Overview Police lock

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floor-mounted police lock schematic


the first floor-mounted. consists of steel bar running on @ 45° angle center of door floor, on inside of area secured. @ each end of bar slots or fixtures (one in door, 1 in floor) steel bar secured.


this designed emiel fox (1869 or 1870–1941). patents relating versions of lock go @ least 1907. fox set fox police lock company in new emoved frame.



crossbar police lock schematic


another type of lock called police lock , formerly made fox police lock company crossbar police lock. features 2 steel bars across width of door , beyond, held 2 brackets set in doorframe. when door unlocked, bars moved inwards point of being withdrawn brackets.


police locks particularly associated new york city in 20th century, , seen in movies set in place , time. floor-mounted types designed use wooden doors , have been superseded advent of metal doors , doorframes. copy of original crossbar type of police lock still made , imported china.









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