Security key-ring

Details Security key-ring Security key-ring

1975-01-20

1976-07-13

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

242107, A47G 2910

Patent

active

039686701

ABSTRACT:
The invention is concerned with a security key-ring meant in particular for prison turn-keys.
It is composed of two half-shells, one male and one female, fitting together, that contain in the space between them an automatic roll-up mechanism with a strong recall spring in its rolled-up position, which mechanism pulls along a solid small chain sliding over the upper edge of the housing and reliably connected with a ring carrying the set of keys, having as a special feature that the rear face of the housing shows a metal fastening assembly in the shape of a clasp which holds it securely to the housing on a plane for its support.
The invention can be expected to interest all key-ring manufacturers and those of small linear measuring instruments.

REFERENCES:
patent: 1818514 (1931-08-01), Whitaker
patent: 2732148 (1956-01-01), Lummis
patent: 3062478 (1962-11-01), Adachi

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