Circuit arrangement for power windows

Details Circuit arrangement for power windows Circuit arrangement for power windows

1980-07-07

1982-08-31

Weldon, Ulysses

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318286, 318466, H02P 122

Patent

active

043474659

ABSTRACT:
A safety control circuit for electric motors of power windows of automotive vehicles and which differentiates between a tight fitting of the window pane and an obstacle blockage. The motor current is selectively detected to provide a signal representative of the instantaneous rather than static current values. The detected signal is compared to a reference signal. When the detected signal exceeds the reference signal by a given value or longer than a predetermined interval, which indicates that an obstacle blockage has occurred, the motor current is switched off or reversed.

REFERENCES:
patent: 3513374 (1970-05-01), Koment
patent: 3581174 (1971-05-01), Hammer
patent: 3611099 (1971-10-01), Kuroyama
patent: 3624473 (1971-11-01), Robbins
patent: 3644811 (1972-02-01), Robbins
patent: 4220900 (1980-09-01), Mintz
patent: 4272708 (1981-06-01), Carle et al.

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