Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

2

Ou

S/O

Brevets

S/O

Description générale

coated cardboard with metal grommets

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

22,0 cm

Largeur

9,0 cm

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Mathématiques

Catégorie

Dispositifs à calculer

Sous-catégorie

S/O

Fabricant

Ou

Perrygraf

Pays

United States of America

État/province

Illinois

Ville

Maywood

Contexte

Pays

Canada

État/province

Inconnu

Période

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.

Fonction

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".

Technique

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.

Notes sur la région

Inconnu

Détails

Marques

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.'

Manque

appears complete

Fini

teal blue, yellow, white and black finished cardboard/ plated metal

Décoration

S/O