Control system for closure means
United States Patent 2499889
US Patent References:
Apparatus for moving objects
- - 1957509

Dosimeter
- - 2036072

Relay
- - 2041079

Circuit control mechanism
- - 2095688

Well surveying method and apparatus
- - 2303688


Inventors:
Teichmann, Charles F.
Publication Date:
03/07/1950
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Assignee:
TEXACO DEVELOPMENT CORP
Primary Class:
60/459
Other Classes:
361/170, 250/374, 361/179, 70/336, 70/277, 49/25, 378/1, 292/1
International Classes:
E05F15/20
US Patent References:
2323128Method and apparatus for determining liquid level
2456233Liquid level measurement and control
Foreign References:
FR832674A