Magnetically actuated switching mechanism for well working tool
United States Patent 3198904
US Patent References:
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- - 2671834

Magnetic switch mechanism
- - 2927176

Flowmeter
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Encapsulated switch
- - 3040143

Electric switch
- - 3052778


Inventors:
Ehlert, Harry C.
Publication Date:
08/03/1965
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Assignee:
CAMCO INC
Primary Class:
335/205
Other Classes:
200/404
International Classes:
E21B23/02; E21B41/00; H01H36/00; E21B23/00
US Patent References:
3121146Position indicating devices