| 摘要 |
A Door Control designed especially for a service passage in a cubicle disposed, say, at or near the entrance of a quick food establishment or the like, i.e., for serving customers on one side of the passage by an employee on the other side. This application is in part a continuation of my copending applications Ser. Nos. 78,095 filed Sept. 24, 1979, now abandoned, and 179,961 filed Aug. 20, 1980, now U.S. Pat. No. 4,411,102, which disclose and claim mechanism for simultaneously opening a pair of doors mounted on vertical parallel axes. In both of said inventions the door opening mechanism is characterized by a horizontally translatable device, such as a pushrod, by an operator's muscular force applied below the service table, leaving the hands free. Upon release of such muscular force, the doors are automatically returned to their original closed positions by means of energy stored, as in a spring, in the opening action. The present invention further contemplates an improvement in said prior inventions by applying automatic actuating means such as an electrical motor and other elements to the door actuating mechanisms of my prior inventions, and possibly to other mechanisms accomplishing the same purpose.
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