Mannheim Slide Rule: Model K & E, 4051

L. E. Jones

Accession Number: 2010.lej.12


A 20″ Mannheim type slide rule, made of celluloid framed on a mahogany surface. The glass cursor is missing. This slide rule has scales only the top surface and includes metric and imperial rulers on either side. Comes in a black cardboard case. Scales: Front: A, B, C, D. Also has rulers on either side. Back: Conversion tables, equivalents and settings. Markings: 185432; <4051>, Pat, June 5, 1900

Alternative Name:

Primary Materials: Celluloid, Mahogany

Markings: Old inventory number = 12.

Dimensions (cm):

Length = 52.2 cm, Width = 3 cm, Height = 1.4 cm

Function: Facilitating calculations.


Item is in poor condition. The glass slide is missing. The slide does not move. Part of the mahogany top surface has split. The bottom of the cardboard case is missing.

Associated Instruments:

Manufacturer: Keuffel and Esser Co., New York

Date of Manufacture: c. 1901-1937


Donated to UTSIC: Yes

Historical Notes: