Locks – Portable
Patent
1989-03-23
1989-08-15
Wolfe, Robert L.
Locks
Portable
70 58, E05B 7300
Patent
active
048563048
ABSTRACT:
A security device for preventing the unauthorized use of a cassette tape deck installed in automobiles, or for locking CD players or computer disk drives. The invention is simple in conception and is made of only two asesmblies. One assembly is a transverse block made of rigid plastic, having a readward member projecting from its back surface and incorporating a cylindrical lock. The other assembly is a "T" shaped tongue piece made of stainless steel. The tongue piece is inserted in a horizontal slot cut in the transverse block, and the top of the "T" plus the rearward projecting member is then inserted in the cassette chamber opening. When pulled through by hand, a projecting ridge on the tongue piece hooks on to and bears against the inside surface edge of the cassette chamber opening. Rotating the cylindrical lock with a key causes a key element to engage one of a number of slots that are cut in the tongue piece. The tongue piece and the transverse block are thus locked in place and cannot be removed from the equipment without causing damage to it.
An alternative embodiment does not incorporate a cylindrical lock, but rather uses an external padlock that is attached to the tongue piece through one of a number of 400. holes drilled in it.
REFERENCES:
patent: 4131001 (1978-12-01), Gotto
patent: 4462233 (1984-07-01), Horetzke
patent: 4616490 (1986-10-01), Robbins
patent: 4640106 (1987-02-01), Derman
patent: 4655057 (1987-04-01), Derman
patent: 4685312 (1987-08-01), Lakoski
patent: 4741185 (1988-05-01), Weinert
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