Selective relay
United States Patent 2486394
US Patent References:
Electromagnetic device
- - 2327395

Vibrator
- - 2415691


Inventors:
George, Eannarino
Publication Date:
11/01/1949
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Assignee:
STANDARD TELEPHONES CABLES LTD
Primary Class:
335/92
Other Classes:
335/132, 335/94, 335/90, 310/29
International Classes:
H01H51/32; H01H51/00
Foreign References:
GB488502A
GB557089A