San Francisco : Architect and Engineer, Inc · leaf 445
h button elevator, in order to preventthe opening of a door from the corridorside unless the car is opposite that door. Insome localities the law requires door locksas well as interlocks on car switch eleva-tors. This feature of preventing the car frommoving away from a floor until the door… … ELECTRO-MECHANICAL DOOR LOCK, INTERLOCK OPEN AND DOOR HOOK IN POSITION OF ENTER- INC7 THE LOCK DOOR LOCK IN CLOSED POSITION—IN THIS POSI-TION DOOR IS FULLY CLOSED AND INTERLOCK ISALSO CLOSED ebruary, 1929 AUCHITLCT AND ENGINEER. 105
Architecture · Building
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