Title:
Variable standing time control
United States Patent 2758676
US Patent References:
Selenium cell door closer
- - 1822152
Zoned elevator system
- - 2492010
Closure operator control mechanism
- - 2634828
Selenium cell door closer
- - 1822152
Zoned elevator system
- - 2492010
Closure operator control mechanism
- - 2634828
Inventors:
Nikazy, Walter A.
Publication Date:
08/14/1956
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Export Citation:
Assignee:
HAUGHTON ELEVATOR COMPANY
Primary Class:
Other Classes:
187/317, 411/935
International Classes:
B66B1/18