Key, telegraph

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Ingenium, 1978.0494.001
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OBJECT TYPE: OPEN CIRCUIT
DATE: 1935–1945
ARTIFACT NUMBER: 1978.0494.001

MANUFACTURER: TELEGRAPH APPARATUS CO.
MODEL: Unknown
LOCATION: Chicago, 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: STEEL/ EBONITE/ METAL/ PLASTIC

Dimensions

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

Length: 30.6 cm
Width: 20.4 cm
Height: 9.5 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Communications
Category: Telegraphy
Sub-Category: N/A

Manufacturer

AKA: TELEGRAPH
Country: United States of America
State/Province: Illinois
City: Chicago

Context

Country: North America
State/Province: Unknown
Period: C 1935 TO 1965
Canada: Unknown
Function: A DEVICE FOR OPENING OR CLOSING AN ELECTRIC CIRCUIT TO TRANSMIT TELEGRAPH OR WIRELESS SIGNALS
Technical: .2: DESIGN CHANGE, TO BETTER FACILITATE THE OPERATOR, RESULTING IN GREATER SPEED.
Area Notes: Unknown

Details

Markings: .2: INCISED MANUFACTURER'S PLATE: 'TELEGRAPH APPARATUS CO./ NOT INC./CHICAGO, ILL. U.S.A. [LIGHTENING BOLT LOGO] TAC' PARTIALLY ENCLOSED IN A CIRCLE/ RESISTOR ON.2: 'AEROVOX/ MADE IN CANADA' IN RAISED LETTERING/ '.005' RAISED ON RESISTOR ATTACHED TO BASE/ RIGHT FRONT CONNECTION NUMBERED: '7 6 4 2'ON ONE SIDE & 'THORDARSON/ 20C62' ON THE OTHER/ INCISED BACK CONNECTION: 'K27J688-5/ 5MFD/ 600VDC-N10S/ INCISED ON PLUG: 'AMPHENOL UG-203/11/CPH-49482'.
Missing: From CA of 09/23/1996 by Kevin Machan: Undetermined
Finish: .2: NICKEL PLATED
Decoration: N/A

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

TELEGRAPH APPARATUS CO., Key, telegraph, circa 1935–1945, Artifact no. 1978.0494, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1978.0494.001/

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