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Lawrence Engineering Services:250-BT OEM

Lawrence Engineering Services 250-BT OEM

Details of: Lawrence Engineering Services - 250-BT OEM

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. CHARVOZ-ROOS SR31 Enhanced Mannheim
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. 25cm
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. A / B,CI,C / D,K
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). / S,L,T /
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus all plastic - 1 hairline
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 1947-1967
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc blue plastic pouch
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

Conversion tables on back

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known 06-2011/

All of:  Lawrence Engineering Services new search?

ModelType
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-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
B.F. Grizzle Water Line Capacity
B.F. Grizzle Gas Pipe Line
B.F. Grizzle Gas Displacement Meter Calculator
B.F. Grizzle Pipe Open Flow Capacity
B.F. Grizzle Pipe Orifice Meter Calculating Rule
B.F. Grizzle Gas Low Pressure Line Flow Capacity Slide Rule
Canadian Radium & Uranium Gamma-Ray Radiographic
Caprock Concrete Quantity Calculator
Code-Maker Pocket Beich
Code-Maker Pocket (boxed pair)
Code-Maker Pocket Dick Tracy
Fun Incorporated Pocket Poker Meter
Ideas Unlimited Poker Meter
MIT Antenna radar beam patterns
Madison Cutting Speed Calculator
Miller Motor Air and Hydraulic Cylinder Calculator
Murphy & Murphy Concrete Quantity Calculator
Pioneer TV coverage calculator
Plaza Express Traffic Manager's
RCA F.M. coverage calculator
Taylor Publishing Copyfitter printing
Tenbrook L.P. Gas
Thomas Music Composition & Transposition
Tokheim 92 "K" Factor fuel oil supply calculator
US Army (DeYOE) Artillery Range Finding
US Aviation Underwriters Insurance actuarial