Title:
Magnetically actuated switching mechanism for well working tool
United States Patent 3198904
Inventors:
Ehlert, Harry C.
Application Number:
US28467063A
Publication Date:
08/03/1965
Filing Date:
05/31/1963
Assignee:
CAMCO INC
Primary Class:
Other Classes:
200/404
International Classes:
E21B23/02; E21B41/00; H01H36/00
View Patent Images:
US Patent References:
3121146Position indicating devices1964-02-11
3052778Electric switch1962-09-04
3040143Encapsulated switch1962-06-19
2988916Flowmeter1961-06-20
2927176Magnetic switch mechanism1960-03-01
2671834Level controlled switch mechanism1954-03-09