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Hemmi: 279

Hemmi 279 Desktop Expert Mechanical Engineer

Details of: Hemmi - 279

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. Desktop Expert Mechanical Engineer
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 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. 50cm
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 LL/1,LL/2,LL/3,DF / CF,CIF,CI,C / D,LL3,LL2,LL1
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 L,K,A / B,T,S,ST,C / D,LL0,LL/0
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus duplex metal/plastic - 1 hairline + scale codes in green
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C2
Date? YYYY for year(s) of production or an approximation/range of years 1963
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc original Hemmi grey case - image courtesy of ISRM
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

Desktop version of 25cm model 259​

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

All of:  Hemmi new search?

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