Slide rule

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OBJECT TYPE
special purpose/cardboard/reactance
DATE
1942
ARTIFACT NUMBER
2005.0085.001
MANUFACTURER
Perry Graf Corp.
MODEL
Reactance Slide Rule
LOCATION
Maywood, Illinois, United States of America

More Information


General Information

Serial #
N/A
Part Number
1
Total Parts
2
AKA
N/A
Patents
N/A
General Description
coated cardboard with metal grommets

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length
22.0 cm
Width
9.0 cm
Height
N/A
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Mathematics
Category
Calculating devices
Sub-Category
N/A

Manufacturer

AKA
Perrygraf
Country
United States of America
State/Province
Illinois
City
Maywood

Context

Country
Canada
State/Province
Unknown
Period
after 1942+
Canada
An American made manual calculating device used by a Canadian electronics engineer in the course of his work. The previous owner of this calculating device was Mr. Bob Bennett, who was born in 1920 in Fort William, Ontario. He attended McGill University, graduating in 1942 with a degree in electrical engineering. During WWII he was in the Signal Corps, stationed in Ottawa from 1942-1946, and was involved in radio design and development. In 1946 Mr. Bennett joined the Canadian Pacific Railway but rejoined the Army in 1947 and remained until 1960 working in radio telecommunication research and development. From 1960 to 1979 Mr. Bennett worked in the Public Service in electronics and telecommunication engineering, largely with D&D.
Function
This aid allows the user to solve "resonant frequency, capacitive reactance, inductive reactance, coil 'Q' an dissipation factor problems that cover a frequency range from 5 cycles per second to to 10000 megacycles".
Technical
An example of a specialized slide rule made by Perry Graf Corp. but distributed as a promotional item by Shure Brothers. The ability to do quick calculations is always useful. The ability to advertise in a manner that the client will continue to see a company name is considered effective. Placing a company name on a functional item like a slide rule achieves both aims. Shure Bothers manufactured and designed microphones, pickups, cartridges and the like.
Area Notes
Unknown

Details

Markings
black and white lettering in one side reads 'SHURE BROTHERS, INC. Reactance Slide Rule [script]/ USE THIS SIDE FOR CALCULATION OF RESONANT FREQUENCY PROBLEMS', 'SHURE/ MICROPHONES [logo]', 'Designers and Manufacturers of Microphones/ and Acoustic Devices', and 'SHURE BROTHERS, INC. 225 WEST HURON STREET, CHICAGO, U.S.A.' with black markings and instructions/ black lettering on the other side reads in part 'CAPACITIVE/ REACTANCE' and 'INDUCTIVE/ REACTANCE' with logos reading 'SHURE/ MICROPHONES' and black markings and instructions/ black lettering on slide reads ' Copyright 1942, Shure Brothers, Chicago, Ill./ Printed in United States of America/ Perry Graf Corp., Maywood, Ill.'
Missing
appears complete
Finish
teal blue, yellow, white and black finished cardboard/ plated metal
Decoration
N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Perry Graf Corp., Slide rule, circa 1942, Artifact no. 2005.0085, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2005.0085.001/

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