Title:
ADJUSTABLE SPRING TENSION MEANS
Document Type and Number:
United States Patent 3431522
Inventors:
Kryspin, Alfred J.
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Publication Date:
03/04/1969
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Assignee:
AUTOMATIC SWITCH CO
Primary Class:
Other Classes:
267/174
International Classes:
H01H50/34; H01H50/16; H01H3/22
US Patent References:
Foreign References:
| GB638614A | ||||
| FR1252745A |