Transmission shifting control system

Details Transmission shifting control system Transmission shifting control system

Filed on

1974-12-23

Date issued

1976-01-06

Examiner

Friaglia, Leo

Patent Class

Motor vehicles

SubClass

Bodies

Other Related Categories

180 82C, 180101, 307 10SB, 340 52E, B60R 2110

Type

Patent

Status

active

Patent number

039305554

Description

ABSTRACT:
A bistable memory circuit is set by a first output signal produced when the driver is absent from his seat of the vehicle to produce an output signal and is reset by a second output signal produced when the driver sits down on his seat but fails to carry out a precautionary safety procedure to protect him to cease to produce the output signal. An AND gate circuit produces an output signal only when an output signal produced when the driver sits down on his seat and the output signal of the bistable memory circuit are concurrently present. An OR gate circuit produces an output signal when at least one of the second output signal and the output signal of the AND gate circuit is present to energize a solenoid to render shifting of the transmission from a parking or neutral position into a driving gear impossible.

REFERENCES:
patent: 1675465 (1928-07-01), Roehrich
patent: 1805088 (1931-05-01), Hardesty
patent: 3438455 (1969-04-01), Redmond
patent: 3729059 (1973-04-01), Redmond
patent: 3859625 (1975-01-01), Eggert
patent: 3864668 (1975-02-01), Bickford
patent: 3870120 (1975-03-01), Blinkilde

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