General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

synthetic disk on cardboard mount with synthetic rule/ metal spindle

Dimensions

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

Length

29.7 cm

Width

21.5 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

University

Country

United States of America

State/Province

Illinois

City

Urbana

Context

Country

Canada

State/Province

Unknown

Period

after 1967 +

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

A manual calculator which enables calculations about polarization derived from the Poincaré sphere to be performed.

Technical

A calculating devise made and copyrighted by an American university. The artifact is marked "this chart may be considered as a projection of the Poincaré sphere in a variety of manners."

Area Notes

Unknown

Details

Markings

black lettering on mount front reads in part 'POLARIZATION CHART/ Department of Electrical Engineering, College of Engineering, University of Illinois, Urbana' with black diagrams and lettering/ black markings and lettering on disk/ black lettering on mount back reads in part 'Reference: G.A. Deschamps "Geometrical Representation of the Polarization of a Plane Electromagnetic Wave." Proc. IRE, Vol. 39, May 1951, pp. 540-544' and '(c) 1967 by the Board of Trustees of the University of Illinois' with black diagrams and lettering

Missing

appears complete

Finish

colourless transparent disk/ colourless transparent rule with black ends/ white mount

Decoration

N/A