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Lawrence Engineering Services:10-D

Lawrence Engineering Services 10-D

Details of: Lawrence Engineering Services - 10-D

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. Lumber Calculator - basic version
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 Closed/solid frame
Material? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc wood/painted
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. § / §,§ / §
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).
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 based on Herman van Herwijnen’s condition/quality scale C4
Date? YYYY for year(s) of production or an approximation/range 1946-1947
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc black thin cardboard pouch
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed Brief instructions printed on bottom front face of the stock
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

For lumber volume in board feet

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known 06-2010/

All of:  Lawrence Engineering Services new search?

10-B DeLuxe Enhanced Mannheim without Trig scales
10-B DeLuxe How To Use It book
10-B OEM GENE LOEWY Enhanced Mannheim without Trig scales
10-B OEM LARCH Enhanced Mannheim without Trig scales
10-B blue Enhanced Mannheim without Trig scales
10-B original Enhanced Mannheim without Trig scales
10-B standard Enhanced Mannheim without Trig scales
10-C Engraver's and Photographer's Proportion Calculator
10-D Lumber Calculator - basic version
10-D0 Lumber Calculator
10-F Pricing and Inventory Rule
10-G Cutting Speed Calculator
10-I Model Builder's Slide Rule
10-N Printer's Proportion Rule
12-H Copyfitter printing
12-J Pro-Rater
250-BT Enhanced Mannheim
250-BT OEM LIETZ 2974N Enhanced Mannheim
250-BT OEM CHARVOZ-ROOS SR31 Enhanced Mannheim
250-BT OEM DU PONT Enhanced Mannheim
250-BT OEM US NAVY Enhanced Mannheim
250-V Enhanced Mannheim
6-Op Pocket Flashrule for GE or Westinghouse flash bulbs
6-Op Pocket Calculator for Photoflash Lamps
6-Ow Pocket Flashrule for WABASH flash bulbs
8-A Mannheim
8-B Enhanced Mannheim without Trig scales
8-B OEM ANCO Enhanced Mannheim without Trig scales
8-B OEM DU MONT Enhanced Mannheim without Trig scales
8-L Copper Wire Selector
8-L Copper Wire Selector - basic Cedar Valley version
9-K Music Transposer
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B.F. Grizzle Gas Pipe Line
B.F. Grizzle Gas Displacement Meter Calculator
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B.F. Grizzle Pipe Orifice Meter Calculating Rule
B.F. Grizzle Gas Low Pressure Line Flow Capacity Slide Rule
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Code-Maker Pocket Beich
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US Aviation Underwriters Insurance actuarial