Circuit controller
United States Patent 2672889
US Patent References:
/0438301.html
- - 0438301

/0883992.html
- - 0883992

Signaling system
- - 1627685

Electromagnetic switch mounting
- - 2174086

Pressure and flow relay
- - 2214616


Inventors:
Swanson, Grant A.
Publication Date:
03/23/1954
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Assignee:
Swanson, Grant A.
Primary Class:
92/39
Other Classes:
340/611, 335/177, 345/211, 200/81.500, 200/81.90R, 137/497, 91/47, 200/83Y, 92/163
International Classes:
G01F1/20
US Patent References:
2258835Flow switch
2417788Rotating contactor relay