Locks – Operating mechanism – Using a powered device
Patent
1983-03-21
1985-08-27
Smith, Gary L.
Locks
Operating mechanism
Using a powered device
70278, 70 95, 70264, E05B 4700
Patent
active
045370494
ABSTRACT:
A power door lock control for vehicles includes a manually operable member which may be the conventional lock-unlock button. One door contains an electrically powered mechanism which operates a locking bolt. Connected to the mechanism is a contact which is cooperable with a second contact on the vehicle body when the door is closed. A pulse circuit in the vehicle is actuated when the driver presses the lock button toward its "locking" position, and supplies spaced pulses to the body contact. The pulses continue at a very low duty cycle, so as to draw minimal current, until the door is closed at which time the door contact and body contact engage one another, thereby completing a circuit from the pulse generator to the powered mechanism. This in turn operates the locking bolt to secure the door. At the same time, a current sensing circuit in the vehicle detects that a pulse of current has flowed through the powered mechanism. Once the pulse of current is sensed, the pulsing circuit is completely shut off, drawing virtually no additional power. With this device the driver, in leaving, can operate the "lock" button, and at any later time merely close the door. This latter will then be automatically locked by the pulse generator, which will then be disabled, all automatically and with minimal use of power.
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Berlow Cynthia
Bittman Mitchell D.
Dubnicka Thomas J.
Smith Gary L.
Sun Chemical Corporation
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