Locking device
First Claim
1. In an engine-powered vehicle having an ignition circuit and an ignition switch means with a plurality of circuit positions, the improvement which comprises an anti-theft arrangement comprising timing means responsive to said switch means and actuated when said switch means is switched to a first position for transmitting a non-sensible lock release signal after a non-sensible predetermined time interval from the instant of actuation of said timing means, said lock release signal having a predetermined duration, and electronic locking means operable in the locked state to disable said engine, said locking means being connected to said timing means for receiving said lock release signal and being responsive to said switch means, said locking means becoming unlocked only when said lock release signal is applied thereto and said switch means is switched to a second position after said time interval and within said duration of said lock release signal, said locking means remaining locked when said switch means is switched to said second position from said first position before or after said duration of said lock release signal, and said locking means includes means responsive to said switch means for inhibiting the unlocking of said locking means for a second predetermined time interval when said switch means is switched from said first position to said second position outside of said duration of said lock release signal.
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Accused Products
Abstract
An anti-theft lock arrangement for a motor vehicle comprises a lock mechanism that normally disables the motor vehicle and a timing mechanism, actuated when the ignition switch is switched to a first position, for transmitting a lock release signal to unlock the locking device after a predetermined time interval from the instant of actuation of the timing mechanism, the locking mechanism being unlocked only when the lock release signal is applied thereto and the ignition switch is switched to a second position after the time interval and during the duration of the lock release signal, neither the predetermined time interval nor the lock release signal being capable of being sensibly perceived.
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Citations
8 Claims
- 1. In an engine-powered vehicle having an ignition circuit and an ignition switch means with a plurality of circuit positions, the improvement which comprises an anti-theft arrangement comprising timing means responsive to said switch means and actuated when said switch means is switched to a first position for transmitting a non-sensible lock release signal after a non-sensible predetermined time interval from the instant of actuation of said timing means, said lock release signal having a predetermined duration, and electronic locking means operable in the locked state to disable said engine, said locking means being connected to said timing means for receiving said lock release signal and being responsive to said switch means, said locking means becoming unlocked only when said lock release signal is applied thereto and said switch means is switched to a second position after said time interval and within said duration of said lock release signal, said locking means remaining locked when said switch means is switched to said second position from said first position before or after said duration of said lock release signal, and said locking means includes means responsive to said switch means for inhibiting the unlocking of said locking means for a second predetermined time interval when said switch means is switched from said first position to said second position outside of said duration of said lock release signal.
Specification