Title:
Magnetically controlled switch
United States Patent 2521723
US Patent References:
/1287896.html
- - 1287896

Low-level alarm switch
- - 1529470

Advertising device
- - 1874199

Magnet controlled switch
- - 2004114

Control device
- - 2178839


Inventors:
Harvey, Hubbell
Publication Date:
09/12/1950
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Assignee:
Harvey, Hubbell
Primary Class:
335/207
Other Classes:
310/104, 335/203, 335/202
International Classes:
H01H36/00
US Patent References:
2234982Flush floor electric outlet
2323910Magnetic switch
2384948Telephone switch or telephone contact