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Maker | Model | Type | Material | Comments | Thumbnail |
A.W. Faber | 380 | Desktop Enhanced Mannheim | wood/celluloid veneers | Gold lettering + cm scale in well of stock - INCHES to METER printed conversion scale on back |
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A.W. Faber-Castell | 3/11 | Desktop Structural Engineering | wood/celluloid veneers | special tables on back |
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A.W. Faber-Castell | 3/31 | Desktop Reinforced Concrete | wood/celluloid veneers | Nomogram on slide and scales in well of stock |
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A.W. Faber-Castell | 342 (ver. 2) | Desktop Columbus Business long-scale - System Rohrberg | Wood/celluloid veneers | Co-branded (box & rule) with KLAWUN + 1st F-C specialist rule for Merchants - extra wide body |
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A.W. Faber-Castell | 385N | Desktop Rietz | wood/celluloid veneers | Popular desktop model + table on constants & 2 cursor windows in back |
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A.W. Faber-Castell | 4/22 | Desktop Business | wood/celluloid veneers | Cursor not shown in image - conversion table on back |
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A.W. Faber-Castell | 4/38 | Desktop Stadia Topography - 360g | wood/celluloid veneers |
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A.W. Faber-Castell | 4/54 | Desktop Darmstadt - early | wood/celluloid veneers | Conversion tables & factors on back | |
A.W. Faber-Castell | 4/54 | Desktop Darmstadt | wood/celluloid veneers | No blind date stamp - coversion tables & factors on a plastic book-mark |
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A.W. Faber-Castell | 4/60 | Desktop Enhanced Mannheim | wood/celluloid veneers | 6 slide tension adjustment screws in bottom edge + table of conversion factors on back with 2 cursor windows |
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A.W. Faber-Castell | 4/87 | Desktop Rietz | wood/celluloid veneers | ||
A.W. Faber-Castell | 4/92/382 | Desktop Log-Log | wood/celluloid veneers | 3-digit model no. suffix was added as the 3/xx series transitioned into the 4/xx series + 6 slide tension adjustment screws in bottom side edge + table of conversion factors on back with 2 cursor windows |
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A.W. Faber-Castell | 4/98 | Desktop Electro | wood/celluloid veneers | V & W scales in well of stock |
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A.W. Faber-Castell | 44/87 | Desktop Rietz | laminated wood/celluloid veneers | Part of unusual limited series made from high pressure laminated (HPL) wood with metal inserts - patent no. DE892693 |
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A.W. Faber-Castell | Heine Realzeitscheibe | Desktop Network Planning | plastic | Special commission for Georg Heine, Stuttgart + front disc doubles as erasable notepad |
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A.W. Faber-Castell | Laukhuff Orgelpfeifen | Desktop Music Organ Pipes - System Rensch | thick plastic | Special commission for German organ builder Laukhuff (still operating) for scaling organ pipes (wood/metal flues & reeds) based on copyrighted design by German Richard Rensch (1923-1997) but preceded by German Wolfgang Adelung’s earlier (simpler) version - extremely complicated to use (cursor extension + graph paper needed for interim calculations) - superb quality but only 500 ever made - Orgelbau-Verlag started selling their own (inferior) version in 1986 |
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ALRO (All-Round) | 400 D (AC-1.nn) | Desktop Darmstadt | metal/paper/plastic | See also smaller sibling - conversion table of fractions also on back |
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ALRO (All-Round) | 500 N (AC-1.nn) | Desktop Basic | plastic/metal/paper | N = Normaal (normal) + personally enhanced (lighter plastic outer baseplate & peripheral cursor hairlines) model of last ALRO Technical Director Han Wanders - see also smaller sibling |
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ALRO (All-Round) | KLIMAATKONTRAKT (AC-2.19) | Desktop Energy Saving | plastic | Slide chart made for & © designed by KK/TRD consisting of consisting of 4 rings of energy saving tips ranked by low/medium/high investment levels for: (i) heating systems (front) or (ii) lighting, energy & sanitation (back) |
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ALRO (All-Round) | Klinische Rekencirkel (AC-1.39) | Desktop Medical - System Lips | metal/paper | Highly complex specialised layout of scales designed by Dr. A. Lips + facilitates 26 medical based calculations (metabolic-related on front & blood ph/gasses on back) - read more … or try out Andries de Man's two online simulations: (i) front & (ii) back |
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ALRO (All-Round) | KLM SYST ALRO - System van Roon (AC-1.35) | Desktop Aviation | metal/paper | Desktop version of smaller GoA with high-precision goniometric layout (double length Trig scales) by van Roon + specially commissioned flight computer for Dutch airline KLM for calculating course & wind correction |
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ALRO (All-Round) | PHILIPS DATA SYSTEMS (AC-3.11) | Desktop Electronics for computer programmers | plastic/metal | Slide chart made for Dutch electronic multinational Philips with © design for their P300 bookkeeping minicomputer showing available functions according memory sectors A to S |
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ALRO (All-Round) | PLANISFEER (AC-6.05) | Desktop Astronomy - Northern Hemisphere | plastic/card | Slide chart designed as planisphere by Dutchman R. Walrecht to calculate star positions & star signs at latitude 52º North & longitude 5º East for given date & time + just 1000 made but later versions made by PlantijnCasparie |
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ALRO (All-Round) | SYNRES (AC-2.23) | Desktop Paint Conversion | plastic | Slide chart converting viscosity values between various standardised units + SYRES = Dutch company (still operating) specialising in commercial coatings & resins for buildings, boats, cars, etc |
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Aristo | 01068 Studio | Desktop Technical/Log-Log | plastic | Extra wide - 25cm (no. 0968) & 12.5cm (no. 868) versions also made |
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Aristo | 01070 MultiLog | Desktop Technical/Log-Log | plastic | Extra wide - Multilog v/s Studio = extra LL00 & LL0 scales - 25cm (no. 0970) & 12.5cm (no. 870) versions also made |
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Aristo | 1055 | Desktop Commerz I Business | plastic | Series of imperial to metric conversion gauge marks on lower front face - s-d-£ scale is folded - inch scale on back - 25cm (no. 955) & 12.5cm (no. 845) versions also made |
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Aristo | 1067 U (D&P) | Desktop Darmstadt | plastic | Co-branded D&P name in well of stock - inch scale on back |
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Aristo | 1067 U | Desktop Darmstadt | plastic | inch scale on back |
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Aristo | 109 (D&P) | Desktop Rietz | plastic | Co-branded D&P name in well of stock |
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Aristo | 30050 Lindell "55" | Desktop Transversal Planimeter | metal/plastic | No slide - specially commissioned by Finnish stationers Ab Herman Lindell Oy - for measuring distances/areas - cursor extension suggests results were transposed for further working - name Herman Lindell + “import” & “copyrighted” in Finnish on the back |
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Aristo | 60126 RADAR-WIND | Desktop Military Artillery Range Finding/Meteorology | plastic/metal | Modern day mit Strichteilung version (inner scales calibrated in more military favoured 6400 milliradians or MILS) of High Altitude Calculator for German Armed forces (NATO NSN No.: 6660-12-140-6737) for global missile trajectories or possibly jet stream & its effect on missiles or planes flying at high altitude |
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AstroCart | Eise Eisinga Planetarium | Desktop Astronomy - Northern Hemisphere | card | Slide chart made for the Eise Eisinga Planetarium (oldest still working planetarium) to calculate star positions & star signs for given date & time as seen from The Netherlands |
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Billeter, Julius & Ernst | W 4 | Desktop long-scale | metal/wood/paper | Missing chrome turning knob - based on drum-based design patented in 1894 (US513172) & tradition of drum-type Swiss makers |
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Billeter, Julius & Ernst | W 10 | Desktop Basic long-scale | metal/paper |
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Blundell Brothers/Rules Ltd. (BRL) | T.20 Technicians | Desktop Log-Log | Bakelite/PVC (Astralon) facings | No batch number but 4 tensioning pins & 4 chiselled out recesses in each end of top & bottom side edges to combat Bakelite shrinking problems + plain Bakelite back - read more ... |
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Casella, L.P. | (NoName) | Desktop "prototype" | wood/celluloid veneers | Stamped CASELLA but possibly made by UK maker W.H. Harling - upside-down scales on the slide probably a design feature when inverting the slide - read more ...
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Color Wheel Company | 3459 Watercolor Wheel | Desktop Colour Mixing - early | card | Slide chart (still sold) designed to assist artists in mixing watercolours & to achieve colour harmonies |
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David Chandler Co. | The Night Sky | Desktop Astronomy - Southern Hemisphere | plastic | Slide chart to calculate star positions & star signs for given date & time + designed to be read at night |
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Dennert & Pape (D&P) | GWR | Desktop Military Naval Artillery | plastic | Instruments for German armed forces during WWII used codes to hide maker’s identity - gwr = D&P + besides solving normal artillery-related distance problems, this naval version also takes into account drift of a moving vessel |
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Dennert & Pape (D&P) | IV | Desktop Enhanced Mannheim | wood/celluloid veneers | IV = model with 4 adjustment screws in bottom edge - railway track scales - cm scale in well of stock |
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Dennert & Pape (D&P) | QR 41 | Desktop Military Artillery Squaring | plastic | QR = “Quadrat-Rechenschieber” - commissioned by “Gebr. Wichmann” (stamp in well) - probably classroom training aid for anti-aircraft gunners - layout consists of two pairs (upper set 0 - 50 & lower set 0 - 15.8) of non-logarithmic independent root scales (no interaction) derived from a set of tables by German Peter Timpenfeld & first published in 1888 - non-conventional use of a cursor purely for positional summing of the squared values |
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Dietzgen | 1752 | Desktop Maniphase/Enhanced Mannheim | wood/celluloid veneers | Going by style of π gauge mark probably made by D&P + Maniphase = Dietzgen name for an Enhanced Mannheim + slightly longer slide + 6 adjustment screws & conversion table on back |
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Dietzgen | 1797A Atlas | Desktop Business long-scale - Type III | metal/enamelled | Affectionately known as a “circular Gunter” - OEM version made by Gilson with novel clutch design & two cursors meaning a single D scale (effective length: 1067 cm) was sufficient + Trig scales + fraction/decimal conversion scale on back act as lookup “tables” |
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Dring & Fage | Carpenter Timber | Desktop Coggeshall | wood/brass | Rare duplex Coggeshall with 4–40 GIRT LINE for volumes of round timber + 2 sets of brass gauge pins (marked 0,16, 8 & 8,16, 0 respectfully) for round, 8 or 16 sided timber + INVERTED LINE (AI scale) for volumes of rectangular timber - compared to Langley version layout front & back reversed |
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Dring & Fage | Customs & Exercise D-F-52 | Desktop Alcohol Gauging Head Rod | wood/brass | Seg Ly. scale on front face is for gauging when the cask is lying on its side + SPH’D scale on back face is for calculating the spheroid |
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Dring & Fage | Mark VI | Desktop Artillery for Indirect Fire | aluminium/nickel silver | Serial no. = 36 - called Apparatus for the Observation of Fire was intended for use by lance-corporals & corporals in the field & not on a desk - issued by Min. of Defence (inventory no. 302SB) |
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Dring & Fage | (NoName) | Desktop Alcohol Gauging | wood/brass | Post 1824 because of IM B & IM G gauge marks signify change from Winchester to Imperial based measurement - bottom Seg Ly. scale is for gauging when the cask is lying on its side |
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DUVAL, Roger | (NoName) | Desktop Rietz | plastic | Little known French maker (Drancy, Paris) - plastic models similar to Graphoplex - unusual wide body + top LL scale not standard for a Rietz making the layout somewhat unconventional |
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Farmar, F.C. | Wine & Spirit Merchants Rule | Desktop Standard for Wine & Spirit Trade | wood/ivorine verneers/brass bindings | Trade rule calculating over/under proof alcohol, gauging, blending, stocktaking, discount & profit + later Gloucester Terrace address = possibly made by Lucas |
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Gebr. Wichmann | 1919R | Desktop Rietz | wood/celluloid veneers | OEM by Nestler - cm scale in well of stock + hand-written list of formulas on back |
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Geo. W. Richardson | Slide Rule Model of 1917 | Desktop Artillery Range Finding | brass/wood/celluloid veneers | Robust military grade OEM for J. H. Weil & Co. - Trig scales are in Mils (6400 mils = 360 degrees) |
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Graphoplex | 6245 | Desktop Electro Log-Log | plastic | Two closed windows with cursor line in back + see also pocket 643 sibling |
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Graphoplex | 6250 | Desktop Rietz | plastic | Late model as colours have sweated or bleed because cheaper methyl ethyl replaced phenol as etching agent - two closed windows with cursor line in back |
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Graphoplex | 643 | Pocket Electro Log-Log | plastic | Name of NL company Ingersoll-Rand in well of stock - one open window right with 1 hairline in back = see also desktop 6245 sibling |
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Graphoplex | DYNSTAT | Desktop Impact Testing | plastic | DYNSTAT is a mechanical impact/resilience testing method popular in Germany (DIN 53435) for testing small samples of plastic |
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Hemmi | 275 | Desktop Hyperlog Electro (ver 1) | bamboo/celluloid veneers | Desktop version of 25cm model 255 - § scales on front face for converting degrees into radians & vice-versa - supposedly for Advanced Electrical Engineers. |
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Hemmi | 279 | Desktop Expert Mechanical Engineer | bamboo/celluloid veneers | metal end braces - desktop version of 259 |
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Hemmi | 70 | Desktop Improved Rietz | bamboo/celluloid veneers | Branded in well but no discernable model no. + table of conversion factors on back - also sold as Tamaya 4480 |
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Hicks J.J. | Pilot Balloon Mark I | Desktop Meteorology poly-slide (2) | wood/celluloid veneers | Meteorological Office (MO) No. 676/38 - innovatively two slides can be locked together & act as one or when unlocked, move independently BUT even when unlocked, if top slide is moved it takes bottom one with it. |
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J. A. Nicholl & Co. | Mark VI | Desktop Artillery for Indirect Fire | aluminium/nickel silver | Serial no. = 48 - called Apparatus for the Observation of Fire was intended for use by lance-corporals & corporals in the field & not on a desk - issued by Min. of Defence |
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John Davis & Son (Derby) Ltd | Democrat | Desktop Mannheim with trig scales | wood/celluloid veneers | 15” version of Autocrat model with extension of cm scale (16-32) in well of stock. “British Made” - steel back + paper table of conversion factors |
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John Davis & Son (Derby) Ltd | Durocrat | Desktop Mannhiem | wood/celluloid veneers | Unmarked - cm scale extension + 6 slits in well of stock - L scale reversed |
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Keuffel & Esser (K&E) | 4051 | Desktop Enhanced Mannheim | wood/celluloid veneers | Serial no. 322 + 5 adjustment screws & conversion table on back |
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Keuffel & Esser (K&E) | 4080-5 | Desktop Decitrig Log-Log | wood/celluloid veneers/metal straps | Serial no. 445698 |
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Keuffel & Esser (K&E) | 4081-5 | Desktop Decitrig Log-Log | wood/celluloid veneers/metal straps | Serial no. 902506 |
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Keuffel & Esser (K&E) | N-4053-5 | Desktop Polyphase Enhanced Mannheim | wood/celluloid veneers | N prefix for new version + serial no. 740727 + 5 adjustment screws & conversion table on back |
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Keuffel & Esser (K&E) | N-4088-5 | Desktop Polyphase Technical | wood/celluloid veneers/metal straps | N prefix = new/modified version + serial no.: 235840 |
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Keuffel & Esser (K&E) | N-4096 | Desktop Merchants' Business | wood/celluloid veneers | N prefix for new version + serial no. 699855 + stripped back scale layout for just x, ÷ & proportions + 5 adjustment screws & conversion table on back + with the lid open can be used in box! |
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Keuffel & Esser (K&E) | N-4101 | Desktop Stadia Topography - 360g | wood/celluloid veneers | N prefix for new version + serial no. 106473 + 5 adjustment screws & conversion table on back |
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Keuffel & Esser (K&E) | 4012 (type 2) Thacher's Calculating Instrument | Desktop Basic long-scale | metal/wood/paper | Special anniversary gift from Ros - serial no. = 1685 |
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Keuffel & Esser (K&E) | Short Base Triangulation | Desktop Military Artillery Range Finding | wood/painted | Specially produced chunky model with a Mannheim-like layout based on Mils - read more ... |
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Klawun, Joe | 1001 Ü (F-C 44/22) | Desktop Business | wood/celluloid veneers | OEM version made by Faber-Castell - British pre-decimal + 6 slide tension adjustment screws in bottom side edge + pictorial instructions & tables of constants on back |
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Koch, Huxhold & Hannemann (KHH) | 1050 | Desktop Rietz | wood/celluloid veneers | On balance probably KHH-made (some but not all of typical KHH traits) but mysteriously “Sistema Rietz” (Spanish) in gold lettering on slipcase & stamped in well of stock - paper data slip missing from back |
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Leningrad Factory | (NoName) | Desktop Military Artillery Range Finding | wood+metal/celluloid veneers | Made in the style of earlier Russian Prometei-made military/pilot slide rules. Intriguingly the military RWTL-2 labelling (in German) on the box stands for Rockets and Weapons Storage - 2 @ Hennersdorfer Heide, Lower Austria. |
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LFAI - Leningrad | (NoName) | Desktop Rietz | wood/celluloid veneers | ROCT (GOST) Russian State Standard No. = 5161-57 + conversion factors & formulas on back |
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LOGA Calculator A.G. | 15m (ver. E) | Desktop Basic long-scale | metal/paper | Serial No. 155202 (“15” correlates to scale length & “5202” = no.) + version “E” = Einfach/elementary |
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LOGA Calculator A.G. | 2.4m (ver. E) | Desktop Basic long-scale - yellow | metal/paper | Serial No. 2237 (possibly correlates to overall scale length) + version “E” = Einfach/elementary |
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LOGA Calculator A.G. | 7.5m (ver. E) | Desktop Basic long-scale - white | metal/paper | Serial No. 751030 (“75” correlates to scale length & “1030” = no.) + version “E” = Einfach/elementary |
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LOGA Calculator A.G. | 75 Praezision 6400 A 0/00 | Desktop Military Artillery/Stadia Topography | aluminium/paper/bakelite | Serial No. 82 with sin, cos & tan scales calibrated in 6400 NATO Mils favoured by the military + sin & cos scales are divided into 4 subscales + see also smaller siblings |
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LOGA Calculator A.G. | 75E | Desktop Basic long-scale | aluminium/paper/bakelite | Model suffix “E” = Einfach/elementary - see also smaller sibling - try out here the online simulation created by Andries de Man |
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LOGA Calculator A.G. | 75EA | Desktop Basic/Monetary/Conversion long-scale | aluminium/paper/bakelite | Serial No. 3474 + model suffix “E” = Einfach/elementary & “A” = additional scales for GBP & imperial/metric conversions - try out here the online simulation created by Andries de Man |
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LOGA Calculator A.G. | 75RZ (ver. 2) | Desktop Retail/Conversion long-scale | aluminium/paper/bakelite | Serial No. 4100 + model suffix “R” = with reciprocal scale & “Z” = extra Zins/interest scale - see also smaller sibling |
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LOGA Calculator A.G. | 75T | Desktop Technical long-scale | aluminium/paper/bakelite | Model suffix “T” = Technisch/technical scales + more accurate later addition to product range marketed to both schools & commerce - see smaller sibling - try out here the online simulation created by Andries de Man |
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LOGAREX | 4542-27501 | Desktop Rietz-like | plastic | Interesting & useable layout of scales |
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Systeem Matthijssen | 370 | Desktop Technical | wood/paper | Use/purpose of the many gauge marks is unknown - SR built into desktop stand for Nederlandse Kabelfabriek (NKF - Dutch cable factory in Delft) |
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Systeem Matthijssen | 386 | Desktop Technical | wood/paper | Possibly a basic model for other specially commissioned designs but use/purpose of the many gauge marks is unknown - SR built into desktop stand |
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Systeem Matthijssen | 412 | Desktop Transport | wood/paper | Commissioned by Coöperatieve Condensfabriek Friesland (CCF a Dutch dairy specialising in condensed milk) - for checking the waybills for shipping/tranporting goods |
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National Rechenwalze, A.G. | 10 | Desktop Basic long-scale | metal/paper | serial no. = 3545 with knurled metal turning knob - stand allows drum to be locked vertically to save desktop space |
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Nestler | (NoName) | Desktop Military | wood/celluloid veneers | Both non-standard scales folded & apart from NESTLER name in well no other markings |
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Nestler | 0215 | Desktop Darmstadt 360° | wood/celluloid veneers | tables of conversion factors on back |
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Nestler | 0235 | Desktop Rietz | wood/celluloid veneers | tables of conversion factors on back |
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Nestler | 0275 | Desktop Technical long-scale | wood/celluloid veneers | Tables of conversion factors + 2 cursor windows in back - long scales (folded @ Pi) & desktop model meant accuracy of 0.03% with smaller sibling 0270 |
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Nestler | 0375 | Desktop Electro | wood/celluloid veneers | Top non-standard scale is for rapid calculation of tension losses in copper wires + bottom non-standard scale is for calculating peripheral velocities (D scale displaced by pi/6 or 0.5326) - table of conversion factors & 2 cursor windows in back + smaller sibling 0370 |
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Nestler | 18 | Desktop Enhanced Mannheim | wood/celluloid veneers | cm scale in well of stock + tables of conversion factors on back |
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Nestler | 21a | Desktop Darmstadt 360° | wood/celluloid veneers | cm scale in well of stock + table of conversion factors on back |
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Nestler | 23a (A/R) | Desktop Rietz - late | wood/celluloid veneers | Unusual scale length - tables of conversion factors on back |
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Nestler | 24 | Desktop Rietz | wood/celluloid veneers | cm scale in well of stock + tables of conversion factors on back - ex Shell (B.P.M.) |
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Nestler | 24b | Extra long Desktop Rietz long-scale | wood/celluloid veneers | Not demonstration type but 10f only 4 engine-divided (only maker capable of desktops >50cm) + early production year from 1908-1911 style of company name - read more .... |
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Nestler | 24R | Desktop Rietz - late | wood/celluloid veneers | cm scale in well of stock + tables of conversion factors on back |
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Nestler | 24R/1 | Extra long Desktop Rietz long-scale | wood/celluloid veneers | Not demonstration type but 1 of only 4 engine-divided 100cm models (only maker capable of engine dividing desktops >50cm) |
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Nestler | 27 | Desktop Technical long-scale | wood/celluloid veneers | cm scale in well of stock+ tables of conversion factors on back - long scales (folded @ Pi) & desktop model meant accuracy of 0.03% + has smaller & later sibling model 0270 |
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Nestler | 28a | Desktop Stadia Universal Topography - 400g | wood/celluloid veneers | Tables of conversion factors on back - model later replaced by 0286 Geometer + see smaller sibling |
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Nestler | 37a | Desktop Electro | wood/celluloid veneers | German silver screws + cm scale in well of stock + Table of constants on back |
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Nestler | 40a | Desktop Retail & Monetary - late | wood/celluloid veneers | Unusual scale layout + British pound sterling (£ s d) scales on back of slide + conversion tables on back |
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Nestler | 45 | Desktop Basic long-scale | metal/paper | Largest of only 3 cylinder/drum models |
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Nestler | 939 Hoehenwindmessung | Desktop Military Artillery Range Finding/Meteorology | plastic/metal | Modern day 360 degree Winkel in Grad version of High Altitude Calculator for German Armed forces (NATO NSN No.: 6660-12-127-6307) for global missile trajectories or possibly jet stream & its effect on missiles or planes flying at high altitude + read more ... |
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Norwood Enterprises | FPB-120 | Desktop Music Composition | card | Slide chart copyrighted design & trademarked DIAL-A-CHORD name |
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PlantijnCasparie | ECLIPS PLANISFEER | Desktop Astronomy - Northern Hemisphere | plastic/card | Slide chart designed as planisphere by Dutchman R. Walrecht to calculate star positions in Northern Hemisphere for given date & time but in a special eclipse of the sun (11/08/1999) edition showing positions of sun, moon, planets & perseids meteor storm + based on version made by ALRO |
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Robson & Co., F. | (NoName) | Desktop Steel & Iron Weight Calculator - imperial | boxwood | One of earliest weight calculators for rectangular & square section bars from little known UK (Newcastle on Tyne) instrument maker/optician |
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Servo Calculator Co. | Boonshaft & Fuchs | Desktop Control Engineering | metal/plastic | After preloading 11 of 25 removeable slides the chosen scale layout can "simply" calculate overall amplitude ratio & phase of a multiterm transfer function |
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Stanley, W.F. (GB) | Gooch | Desktop Gauge for Centering poly-slide (2) | wood/metal | Invented & patented (GB189313940 - 1894) by Charles Gooch as an impoved gauge for centering & mounting photographic prints et al - the 2nd slide is attached on top of the slide in the stock by means of a metal sleeve/clamp |
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Stanley, W.F. (GB) | M3613 Professor Fuller's Type 1 | Desktop helical long-scale | brass/mahogany | Patented (GB187801044 & US219246) design by George M. Fuller - serial No. 4869 with conversion tables, natural sines & Birmingham Wire Gauge on inner fixed cylinder |
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Stanley, W.F. (GB) | Pilot Balloon Mark II | Desktop Meteorology | wood/celluloid veneers | Meteorological Office (MO) No. 1979/43 - possibly made for Stanley by J.J. Hicks or A.G. Thornton - adoption of standard rates of ascent removed need for Mark I poly-slide (2) but 4th cursor needed for “tail method” |
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Stanley, W.F. (GB) | Professor Fuller's Type 0 | Desktop helical long-scale - early production | steel/brass/mahogany | A 48th Wedding Anniversary present from Ros - patented (GB187801044 & US219246) design by George M. Fuller - hand-held early shorter version with no spigot & no serial no. + conversion tables, natural sines & Birmingham Wire Gauge on inner fixed cylinder |
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Stanley, W.F. (GB) | W.H. Glaser | Desktop Textile Conversion poly-slide (2) | wood | Unusual fixed cursor extending the range of a relatively short scale length - read more ... |
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Tavernier-Gravet | (NoName) | Desktop Pipe Flow - System Aisenstadt | wood/celluloid veneers | Narrow body design by E.A. Aisenstadt & date stamped in back |
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Thornton A.G. / P.I.C. / British | A.G. (NoName) | Desktop "prototype" | wood/celluloid veneer | Unbranded but attributable to Thornton (horizontal/flat diamond box identification marks & reversed bottom edge scale) - traditional B scale replaced by upward pointing arrow - read more ... |
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Thornton A.G. / P.I.C. / British | PIC 112 | Desktop Differential Rietz | wood/celluloid veneers | Rietz type without Trig scales but with extra Thornton patented differential Trig scales - conversion tables on back - “big brother” version of PIC 111 |
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Thornton A.G. / P.I.C. / British | PIC 122 | Desktop Differential Log-Log | wood/celluloid veneers | Extra Thornton patented differential Trig scales - conversion tables on back - "big brother" version of PIC 121 |
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Thornton A.G. / P.I.C. / British | PIC 132 | Desktop Differential Electro | wood/celluloid veneers | Extra Thornton mini Y & Z scales for financial calculations + patented differential Trig scales + Vector analysis scale - V & W scales in well of stock (plastic well cursor) - conversion tables on back - “big brother” version of PIC 131 |
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Thornton A.G. / P.I.C. / British | PIC F 3651 | Desktop Electrical & Mechanical Engineer Electro | wood/celluloid veneers | V & W scales in well of stock - conversion tables on back of stock |
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Thornton A.G. / P.I.C. / British | PIC F 3756 | Desktop Mannheim | wood/celluloid veneers | conversion tables on back |
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Tombeur | Radix 2/10 | Desktop Log - System Leibniz | mahogany/paper + perspex | Decimal/10-bit binary (base/2/base 10) rule. Serial no. 019 blind-stamped in back |
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Troeger (Hans) | (NoName) | Desktop Pricing long-scale | cardboard/plastic | Uncannily similar (visual & construction) to much earlier Swiss-made Lightning Calculator (Blitzrechner) of Ernst Billeter - extra % scale for discount &/or profit margin mark-up calculations - son of K. Emil Tröger who took over the company his father founded |
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Troeger (Karl Emil) | Lung Volumes and Breathing | Desktop Medical long-scale | cardboard/wood | Standard values of AG Pathophysiologie d. Atmung - “1” in equilateral triangle = East German (DDR) post 1950 certification mark for “1st or good quality” - Karl Emil founded the company later taken over by son Hans - 8 mini specialist scales overlaid on D scale |
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Troeger (Karl Emil) | Neues Deutschland (ND) | Desktop Typography printing - System B. Burghardt | cardboard/wood | Unmarked but obviously Karl Emil made - Neues Deutschland = East German daily newspaper - Cicero is a typographic unit of measure similar to a pica but with 15th century origins |
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Troeger (Karl Emil) | No. 1 (ver. 37/393/6004) | Desktop Basic+ long-scale | cardboard/wood | “1” in equilateral triangle = East German (DDR) post 1950 certification mark for “1st or good quality” - Karl Emil founded the company later taken over by son Hans |
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Unique | Pioneer Long Scale | Desktop ?? long-scale | wood/paper coated with plastic laminate | Extra wide (3¼") body with mysterious non-standard folded long-scales + 3 extra § scales in well & table of possible constants on back |
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Unknown | 1410 Planisphere | Desktop Astronomy - Northern Hemisphere | plastic | Slide chart to calculate star positions & star signs but apart from being German & having 1410 as a possible model number on the back, its provenance is a bit of an enigma |
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Unknown | Noel-Bentley | Desktop Paper Roll Computor poly-slide (2) | plastic | Robert Noel-Bentley design (patent CA489176 - 1952) for calculating (pre-shipment) physical characteristics of commercially manufactured large & heavy rolls of paper - possibly made by Blundell. |
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Unknown | (NoName) | Desktop Gunter Rule | wood incised/brass pins | Invented by Edmund Gunter (1581-1626) - standard layout for a Gunter i.e. Diagonal scale on front face + full-length scales on back |
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Unknown | (NoName) | Desktop Steel Weight Calculator - imperial | wood/printed paper | Wide-bodied & well made but otherwise no clues as to the maker - scale layout identical to Robson model |
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Unknown | (NoName) | Desktop Poly-slide (2) Steel Bars & Sections Weight Calculator - imperial | thick plastic | Wide-bodied model possibly made by BH |
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Unknown | Orgelbau-Fachverlag | Desktop Music Organ Pipes - System Rensch | thin plastic | Made for specialist German music publisher Orgelbau-Fachverlag for scaling organ pipes (wood metal flues & reeds) but a follow-on cheaper & thinner version of original limited high-quality Laukhuff Orgelpfeifen model by F-C + Table of frequencies on back |
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US Navy Hydrographic Office | 2102-C Rude Star Identifier | Desktop Astronomy - Northern & Southern Hemispheres | plastic | Slide chart A-N Type 1 for aeronautical use based on an original design by Gilbert T. Rude but later modified by Elmer Collins + set consists of a double-sided white base plate (side for each hemisphere) & 6 transparent plastic overlays |
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Van Oosterhout, A. | (NoName) | Desktop Replica Gunter Rule | wood incised | Invented by Edmund Gunter (1581-1626) - replica made by KRING member Ton van Oosterhout - standard layout for a Gunter i.e. Diagonal scale on front face + full-length scales on back |
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W.H. Harling | 702 | Desktop Enhanced Mannheim - early | wood/celluloid verneers | No makers name or logo - catalogued by Colin Barnes as “Lloyds Register Slide Rule” - table of constants on back |
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William Langley | Carpenter Timber | Desktop Coggeshall | wood/brass | Rare duplex Coggeshall with 4–40 GIRT LINE for volumes of round timber + 2 sets of brass gauge pins (marked 0,16, 8 & 8,16, 0 respectfully) for round, 8 or 16 sided timber + INVERTED LINE (AI scale) for volumes of rectangular timber - compared to Dring & Fage version layout front & back reversed |
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