Title:
Door control apparatus
United States Patent 2900521
US Patent References:
Selenium cell door closer
- - 1822152
Door operating apparatus
- - 1929273
Safety device for vehicle doors
- - 1947079
Counting apparatus operated by radiant energy
- - 2082941
Door control system
- - 2149177
Selenium cell door closer
- - 1822152
Door operating apparatus
- - 1929273
Safety device for vehicle doors
- - 1947079
Counting apparatus operated by radiant energy
- - 2082941
Door control system
- - 2149177
Inventors:
Eames, William F.
Publication Date:
08/18/1959
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Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
Primary Class:
Other Classes:
250/221, 250/208.400
International Classes:
B66B13/26; B66B13/24