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Dargue Brothers Ltd / Simplon:S.E.10 (Bilateral)

Dargue Brothers Ltd / Simplon S.E.10 (Bilateral) Electro

Details of: Dargue Brothers Ltd / Simplon - S.E.10 (Bilateral)

Type? Where possible the generic name preceded by the form if not 25cm/10” linear - e.g. Pocket Enhanced Mannheim. For specialty types, often supplemented by its use. Sometimes a suffix is also added to distinguish between versions of the same model. Electro
Sort? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) L
Construction? Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other Duplex
Material? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc wood/paper covered by clear plastic
Length? Mostly length in cm or ” (inches) of the D scale but excluding any scale extensions. But for circular or watch slide rules it is the diameter & for tubular or drum slide rules it is the overall linear scale length. For other mechanical aids it is the physical length. 10"
Scales front? Mostly standardised (not maker’s) symbols for scales on front of stock e.g. A = X² (1-100) but § = generic symbol for any non-standard scale. Scales between solidi (/ /) are on the slide(s) whereas a vertical line ( | ) or reversed solidus ( \ ) + a symbol denotes scale(s) on a straight or bevelled edge. LL2,A / B,CI,C / D,LL3
Scales back? Mostly standardised (not maker’s) symbols for scales on back of stock e.g. S = sine (5° to 90° & 85° to 0°) or sin(x) but § = generic symbol for any non-standard scale. Scales between solidi (/ /) are on the back of the slide(s). / A,S,T,D / - L,D on back of stock
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus white & clear plastic - 1 hairline + 2 periheral hairlines
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C3
Date? YYYY for year(s) of production or an approximation/range 1931-1960
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 English additional instructions
Booklet (PDF)? Downloadable .PDF copy of unusual or uncommon model specific instructions download
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

“Half-duplex” layout with scales on back of closed frame stock & dual cursor tracks - W & V scales in well of stock - degree (<5˚34’) Tan & degree (70˚-90˚) Sin look-up tables on back of extra wide non-reversible slide with chamfered edge cursor as part of well + table of conversion factors on back

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known 07-2014/

All of:  Dargue Brothers Ltd / Simplon new search?

Bilateral Log-Log - early
S.B.10 Bilateral Log-Log
S.B.5 Bilateral Pocket Enhanced Mannheim - early
S.E.10 (Bilateral) Electro
S.M.10 Major (Bilateral) Log-Log
S.P.10 Primary Log-Log
S.P.5 Primary Pocket Mannheim
S.R.10 Bilateral Rietz
SR-2 Sub-Ivory Pocket Mannheim
SR-5 Sub-Ivory Uniface Technical
WR1-A Selecta Mannheim
XL-10 (Bilateral) Log-Log