Microphone

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Ingenium, 1978.0520.001
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OBJECT TYPE: CRYSTAL/UNIDIRECTIONAL
DATE: 1938
ARTIFACT NUMBER: 1978.0520.001

MANUFACTURER: Shure Bros.
MODEL: 730A
LOCATION: Chicago, Illinois, United States of America

More Information

General Information

Serial #: S5432
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: CAST METAL CASE & MOUNTING/ CONNECTOR ASSEMBLY. PROTECTIVE GRILL CLOTH. CRYSTAL MICROPHONE CAPSULE & FOAM RUBBER MOUNTING MATERIAL

Dimensions

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

Length: N/A
Width: 11.5 cm
Height: 8.5 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

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

Manufacturer

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

Context

Country: North America
State/Province: Unknown
Period: 1938-1950
Canada: Unknown
Function: USED TO PICK UP SOUND, VOICE OR MUSIC, & CONVERT TO COMPLEX ALTERNATIGN CURRENT. THE ALTERNATING CURRENT WOULD BE APLIFIED & USED TO DRIVE SPEAKERS ETC.
Technical: AN EXAMPLE OF THE `CARDIOID' DESIGN IN A CRYSTAL MICROPHONE
Area Notes: Unknown

Details

Markings: MFG'S PLATE: `MODEL/ 730A/ CARDIOID/ Uniplex/ UNI-/ DIRECTIONAL/ CRYSTAL MICROPHONE/ SERIAL/ S5432/ SEE PATENT NOTICE/ INSIDE AND ON CARTON/ MADE IN/ UNITED STATES OF AMERICA/ SHURE BROTHERS CHICAGO USA'
Missing: N/A
Finish: CHROME PLATED
Decoration: RAISED PROTECTIVE GRILL OVER DIAPHRAM OPENING

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

Shure Bros., Microphone, circa 1938, Artifact no. 1978.0520, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1978.0520.001/

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