Travel alarm system

Details Travel alarm system Travel alarm system

1977-04-08

1978-12-05

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

307 10R, 340 70, 340377, 340384E, 340527, B60Q 500

Patent

active

041288270

ABSTRACT:
A switch connected to a power source is closed automatically in response to a vehicle being conditioned for travel and is opened in response to the vehicle being stopped. First and second apparatuses deliver first and second electrical signals, respectively, to a switching device in response to the switch being closed. The switching device is rendered conductive for connecting the power source to an alarm for energizing the alarm when either one or both of the first and second signals is delivered thereto. The switching device is rendered nonconductive for deenergizing the alarm in response to neither of the signals being present. A timer stops delivery of the first signal to the switching device only after the first signal has been delivered to the switching device for a predetermined period of time. A manual override is provided for manually selectively stopping delivery of the second signal to the switching device.

REFERENCES:
patent: 3439324 (1969-04-01), Kirimoto et al.
patent: 3569927 (1971-03-01), Guyton et al.
patent: 3728676 (1973-04-01), Brown
patent: 3739367 (1973-06-01), Fathauer
patent: 3827024 (1974-07-01), Anderson et al.

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