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Carbic Ltd / Otis King: Fischer Calculator

Carbic Ltd / Otis King Fischer Calculator Helical long-scale

Details of: Carbic Ltd / Otis King - Fischer Calculator

Type? Usually a generic name preceded by the form if not standard linear length - e.g. Pocket Enhanced Mannheim. For special models often supplemented by its function/use - e.g. meteorology. Sometimes a suffix is needed to distinguish between different versions - e.g. early or late. Helical long-scale
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 & 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. 190" (all 4 scales end-to-end)
Scales front? Standard (not maker’s) symbols for scales on front face e.g. A = X² (1-100) but § = generic symbol 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 A (1 cycle), D, S, T helical
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 for any non-standard scale + scales between solid / / 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 wide plastic tube with 4 black positioning arrows
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 of years 1960s
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc dark mottled green tube with cap - image courtesy of Otto van Poelje photolab
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 (GB778556) by Rafael Fischer in 1957 - 4 equidistantly spaced red positioning arrows on the inner moveable plastic sleeve

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known 03-2014/

All of:  Carbic Ltd / Otis King new search?

ModelType
Fischer Calculator Helical long-scale
Model K 2nd version Pocket 07 helical long-scale white on black
Model K 2nd version Pocket 11 helical long-scale brass
Model K 2nd version Pocket 12 helical long-scale
Model L 4th version Pocket 03 helical long-scale
Model L 4th version Pocket 13 helical long-scale
Model N Pocket 03 Retail & Monetary white on black