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Slide Rule

2019/008

Keuffel & Esser N4041 10 in Mannheim slide rule in a black leather on cardboard case

c.1930

SKU: 2019/008 Categories: , ,

Description

Keuffel & Esser N4041 10 in Mannheim slide rule in a black leather on cardboard case with flap and stud fastener (c.1930). Equivalent tables on reverse. It is a generic slide rule with scales A and D on the stock and B and C on one face of the slide, with scale S,L and T on the reverse side representing cine, logarithm and tangent respectively.

The slide rule was passed down to the donor from her grandfather Alec Gilbertson FICE FIMechE who was a chartered civil and mechanical engineer with world-wide experience. To see a copy of his extensive CV click here.

Additional information

Acquisition Number

2019/008
Item Type

Short Description

Keuffel & Esser N4041 10 in Mannheim slide rule
Manufactured by

Date of Manufacture

c.1930
Sub-items

Board and leather case
Supporting Items

Self Teaching Manual (Breckenridge WE. The Mannheim Slide Rule Nos. 4031S, N4035S, N4041 and 4051, Keuffel & Esser Co, 1938)
Makers Number

768766
Marks

KEUFFEL & ESSER CO. NY”, “PAT.1,934,232”, “MADE IN U.S.A.” and “768766”
Dimensions (mm)

268 x 34 x 10. Weight: 60 g (slide rule only)
Donor

Date Donated

June 2019
Materials

Celluloid laminated mahogany
Condition

Good. Some discolouring on rule and case shows some wear.
Display Location

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