Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1979-03-13
1980-12-16
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
Specific condition
340573, 340 64, 180173, 180272, 307 10AT, G08B 2300, B60K 2708
Patent
active
042400716
ABSTRACT:
A digital circuit for the prohibition of operation of a motor vehicle by an intoxicated person may be fabricated by combining an ignition switch with an engine locking and unlocking means, timing means, sensing means and an indication means. The normal ignition circuit of a motor vehicle is interrupted by an engine locking and unlocking means. A timing signal is generated by the timing means in response to signals received from a clock and a sensing means which in turn is responsive to the performance of the operator in a motor ability test such as the ability to maintain a predetermined amount of steady pressure on a brake pedal. If the operator is successfully performing the test, an indication means produces a first cognizable signal which indicates a successful performance. After the operator has successfully performed the test for a predetermined duration as determined by the count stored in a register, a second cognitive signal is produced by the indication means which indicates that the operator is qualified to operate the vehicle. The normal ignition circuit is then completed by the engine locking and unlocking means in response to the timing signal. The motor vehicle may then be started in the conventional fashion.
REFERENCES:
patent: 3312508 (1967-04-01), Keller et al.
patent: 3735381 (1973-05-01), Zadig
patent: 3755776 (1973-08-01), Kotras
patent: 3866168 (1975-02-01), McGuirk
patent: 3886540 (1975-05-01), Sussman et al.
patent: 3942151 (1976-03-01), Takeuchi
patent: 4004290 (1977-01-01), Kobayashi et al.
patent: 4058113 (1977-11-01), Fields
patent: 4158198 (1979-06-01), Ochiai
Caldwell Sr. John W.
Crosland Donnie L.
Toyota Jidosha Kogyo Kabushiki Kaisha
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