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Title Manual: Cooke Radio Slide Rule. Supplementary Manual. Published by Keuffel & Esser, N.Y. & Hoboken, cpyrt 1942 (issued 1943 or later.)
Object Name Manual
Catalog Number 2012.001.0068
Collection Keuffel & Esser Company Collection
Credit Museum Collections.
Scope & Content Manual: Cooke Radio Slide Rule. Supplementary Manual. Published by Keuffel & Esser, N.Y. & Hoboken, copyright 1942. (Not issued issued before 1943.)

Printed booklet, pp [iii], 62.

The Cooke Radio duplex slide rule, model 4139, was apparently first offered in a 1943 catalog; see notes for history on this rule. Back cover code: 12,043.

Cover text:
COOKE RADIO
Slide Rule
A SUPPLEMENTARY MANUAL
BY
NELSON M. COOKE
Chief Radio Electrician, U. S. N. Member, Institute of Radio Engineers.

NOTE: This booklet is written primarily for the radio or electrical student. It explains only special applications of basic scales, and the uses of scales found only on the Cooke Radio Slide Rule. A discussion of the powers of ten is also included. The booklet is a supplement to the instructions covering the Polyphase Duplex Decitrig Slide Rule No. 4071. Be sure that you receive the manual for No. 4071, which explains the general use of this slide rule.
PUBLISHED BY

KEUFFEL ESSER CO.
NEW YORK • HOBOKEN. N. J,

CHICAGO • ST. LOUIS • DETROIT
SAN FRANCISCO • LOS ANGELES • MONTREAL
Notes Text found 2012 at:
http://www.mccoys-kecatalogs.com/KEModels/ke4139family.htm

(see full website: http://www.mccoys-kecatalogs.com/KECollection/collection.htm)
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Collection of pages from K&E catalogs for the 4139 Cooke Radio Slide Rule

Description:

Page from the 1943 catalog

The 4139 Cooke Radio Rule is a variant of the 4071-3. The K scale was replaced by the 2pi scale, the L scale was moved, and a LC scale was added.

This slide rule was constructed on a mahagony frame with celulite laminated to the surface. The markings are engine divided. The scales on the 4139 as it was released in the 1943catalog are as follows:

Front: L DF = CF CIF C C = D 2PI
Rear: LC A = B T ST S = D DI

The 1962 catalog shows that the ST scale was replaced with the SRT scale. The change actually happened some time between 1956 and 1958 before the 68 xxxx series of numbers. This new scale set is as follows:

Front: L DF = CF CIF CI C = D 2PI
Rear: LC A = B T SRT S = D DI
The various model numbers of the Cooke Radio Rule are as follows:

4139
68 1460
68 1465
History:

The 4139 first appeared in the 1943 catalog. The 4139 last appeared in the 1967 catalog. The following is a brief history of the 4139 slide rule as is told in the K&E catalogs that are available at this time. Exact timing is not possible because of the time between catalogs.

1942 - The price list for the 1942 catalog mentions the 4139 while the catalog does not. This price list is dated Jan. 1, 1939.
1943 - The 4139 was introduced.
1956-1958 - The ST scale on the 4139 was replaced with the SRT scale. There is no documentation of this in catalogs however there are actual examples in the field.
1962 - The model numbers were converted to the 68 xxxx series of numbers.
1972 - Last appearance in catalogs.
Links to catalog pages for the 4139 slide rule:

1942 1943 1944a 1944b 1947 1949a 1949b 1952 1954 1955a 1955b
1959 1962 1967 1972
====
Date 1942-1943
Year Range from 1942.0
Year Range to 1943.0
Search Terms Keuffel & Esser Co.
K & E
Caption front cover
Imagefile 151\20120010068.TIF
Classification Manufacturing
U.S. Navy
Military
Business & Commerce