Land vehicles – Wheeled – Attachment
Patent
1978-01-18
1980-03-25
Peters, Jr., Joseph F.
Land vehicles
Wheeled
Attachment
24230A, B60R 2110
Patent
active
041947649
ABSTRACT:
A lock coupling for safety belts includes a housing formed with an aperture in the top through which a release button is accessible. The housing has a plug aperture for receiving a coupling part adjustably attached to a safety belt and a coupling pocket having a locking bar is accommodated in the housing and is connected to a tension member secured to a vehicle chassis. The coupling part has a lock latch engageable with the locking bar and the latching is automatically releasable, against the action of the spring force corresponding to a definite minimum pull load of, for example, 75-80 kgs. Automatic disengagement is effected, on one hand, by an electromagnet responsive, with time delay, to an electronic time switch which is switched on responsive to occurrence of a definite minimum pull load, and, on the other hand, by a locking part which is displaceable by the locking bar. The time switch can be triggered recurrently responsive to the minimum pull load, and comprises a recurrently triggerable monostable circuit whose period of quasi-stable state corresponds to the desired time delay and whose stable output is logically combined, through a gate circuit, with the trigger input and connected, through a pulse amplifier, to an electro magnet.
REFERENCES:
patent: 3146846 (1964-09-01), Gutshall
patent: 3311188 (1967-03-01), Gutshall
patent: 3871090 (1975-03-01), Romanzi, Jr. et al.
patent: 3963090 (1976-06-01), Hollins
Huizinga Jan Jakob
Peters Jr. Joseph F.
Smith Milton L.
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