Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1977-11-03
1979-06-12
Smith, Jr., David
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
H02P 200
Patent
active
041581601
ABSTRACT:
A driver's seat is automatically adjustable for height in response to the weight of the person sitting in it. The seat is carried by a spring suspension which is displaceable by a reversible servo-motor. Scanning means for controlling the motor comprise an actuating member and two vertically spaced sensors, either the actuating member or the sensors being secured to the seat for movement therewith and the other being stationary. If the seat carries a lightweight person, the spring suspension permits it to descend to a position where the actuating member and the upper sensor co-operate to activate the servo-motor to displace the suspension for lowering the seat still further, whereas in the case of a heavy person the actuating member and the lower sensor are effective to raise the seat.
REFERENCES:
patent: 2983545 (1961-05-01), Garvey et al.
patent: 3236033 (1966-06-01), Adams et al.
Grammer Willibald
Smith Jr. David
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