- 455 Martinson, Los Angeles
- 8 (043) 567 - 89 - 30
- support@email.com

Type | ? A generic name (e.g. Rietz) or function/use for specialist models (e.g. Meteorology) for grouping similar models across makers. If not “standard” 25cm linear length, preceded by the form (i.e. Demonstration, Desktop, Pocket, Waistcoat, Keyring, Lilliput or Book) + if needed, qualification to distinguish between versions (e.g. early or late). | Child's Multiplication Table Teaching Aid/Pencil Case |
---|---|---|

Sort | ? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) | T |

Construction | ? Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other | Other |

Material | ? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc | metal |

Length | ? Mostly the linear length of the D scale (in cm or inches) excluding any extensions. For circular/watch slide rules it is the diameter but for helical/tubular/drum slide rules it is the overall scale length. For other calculating aids it is the physical length. | 9" |

Scales front | ? Standard (not maker’s) symbols for scales on front face e.g. A = X² (1-100) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the slide(s) whereas scales after vertical line | or after reversed solidus \ are on a straight or bevelled top or bottom side edge | inch |

Scales back | ? Standard (not maker’s) symbols for scales on back face e.g. S = sine (5° to 90° & 85° to 0°) or sin(x) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the back of slide(s) but scales listed after / / - notation are on another surface e.g. back of stock or inside a lid | |

Cursor type | ? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus | none - not needed |

Condition | ? Cn where n = 0-6 condition/quality scale where 0 = brand new in box & 6 = broken | C4 |

Date | ? YYYY for year(s) of production or an approximation/range of years | 1920s |

Extras | ? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc | |

Instructions | ? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed | |

Comments | ? Any special or noteworthy traits + significant use-related facts + pertinent details of scales/tables in well of stock + any significant tables, etc on the back of the stock | Invented & patented (GB167699) as a teaching aid for 1 - 20 multiplication tables by Percy Darnley & Barnett Richards in 1920 - possibly inspired by earlier 1885 German patent (DE33155) of Peter Wiesenmüller - dark-blue & green versions also made + German 4-colour series branded |

In-Out | ? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known | <2005 |

Model | Type |
---|---|

HABS | Child's Multiplication Table Teaching Aid |

(NoName) | Alcohol Proof |

(NoName) | Cheese making - System K. Von Henning |

(NoName) | Enhanced Mannheim |

(NoName) | Hatters Gauge |

(NoName) | Machining Time |

1246 Gevaert Separation Control Chart | Colour Separation |

1410 Planisphere | Desktop Astronomy - Northern Hemisphere |

Atlas Copco | Pocket Pipe Flow - imperial |

Atlas Copco | Pocket Pipe Flow - metric |

Atlas Copco | Pocket Pipe Flow for Compressed Air - metric & imperial |

B.F. Grizzle | Water Line Capacity |

Balkenschuif | Wooden Floor & Ceiling Beams |

BMI Calculator | Pocket Dietary |

Carpenter Timber | Joint 2-fold Large Plate-hinged Coggeshall |

Carpenter Timber | Pocket Joint 4-fold Old Arched-hinged Coggeshall |

"Consul" The Educated Monkey | Replica Child's Teaching Aid/Calculator for simple arithmetic |

Darnley's Rotable Lightning Calculator | Child's Multiplication Table Teaching Aid/Pencil Case |

Dieterle | Dancing |

Easy-Keys! | Waistcoat Music Chord Indicator & Transposer |

Electroflo | Boiler Efficiency & Energy Costs |

Ernst Gerber Heating Calculator | Heating requirements for rooms |

Everard | 4-sided Alcohol Gauging poly-slide(4) |

Flexider Benelux | Pipe Expansion poly-slide (2) |

Forcing Disc | Horticulture |

II3-I05-0I-I3 | Music Guitar Chords |

MAGIC - BRAIN CALCULATOR | Slide Adder - silver/red |

Merchants Calculator | Retail |

MERK-o-GRAAF MERKENZOEKER | Business |

Miraccord | Music Guitar |

Noel-Bentley | Desktop Paper Roll Computor poly-slide (2) |

(NoName) | Desktop Gunter Rule |

(NoName) | Desktop Steel Weight Calculator - imperial |

(NoName) | Gaugung Diagonal Line Rod |

(NoName) | Half Gunter Rule |

(NoName) | Lighting |

(NoName) | Desktop Poly-slide (2) Steel Bars & Sections Weight Calculator - imperial |

Orgelbau-Fachverlag | Desktop Music Organ Pipes - System Rensch |

Orgelpfeifenmensuren-Rechenstab (ver. 2) | Music Organ Pipes |

Petit & Fritsen (ver. F) | Music Carillons |

Petit & Fritsen (ver. GB) | Music Carillons |

Petit & Fritsen (ver. NL) | Music Carillons |

RG-44 | Demonstration Military Artillery Range Finding - System Grigorovich |

Sikkens Blind Color | Colour Blending |

Slide Rule of Music | Music Chord Indicator & Transposer poly-slide(3) |

Smarty Cat | Child's Teaching Aid/Calculator for Simple Arithmetic - early |

Smarty Cat/Skole-Regnestok | Child's Teaching Aid/Calculator for Simple Arithmetic |

Total Stralenschutz | Pocket Radiation |

Twaddell | Strength of liquids |

VISCALEX | Pocket Petroleum Pipes |

Viskositaets-Temperature Kalkulator | Viscosity-Temperature Calculator |

кнп-57 | Aviation poly-slide(2) |