Lock

Details Lock Lock

1977-06-06

1979-05-08

Wolfe, Robert L.

Locks

Portable

Padlocks

70409, E05B 6736

Patent

active

041529090

ABSTRACT:
A lock for a railroad switch or the like, which comprises a housing providing a socket at one end and an elongated shackle having an enlargement on one end and a recess on the other end for cooperating with locking balls in the housing socket to be received in locking engagement therein, in which the operating means for the locking balls in the housing is a rotatable member having an enlarged head disposed in a recess at the end of the housing opposite the socket end, the interior of said recess being cylindrical, the periphery of the enlarged head being sufficiently out of round to enable it to be rotated by a tool having a suitably shaped recess, yet not sufficiently out of round to be readily apparent from visual observation.

REFERENCES:
patent: 1744984 (1930-01-01), Page
patent: 1805779 (1931-05-01), Metz
patent: 1978781 (1934-10-01), Berger
patent: 1994095 (1935-03-01), Caldwell
patent: 3914965 (1975-10-01), Paxton

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