Keyless entry system for automotive devices with compact, portab

Details Keyless entry system for automotive devices with compact, portab Keyless entry system for automotive devices with compact, portab

1985-04-10

1987-06-09

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082569, 340 52D, 70257, 180287, 307 10AT, G06F 704, B60R 2504, B60Q 100

Patent

active

046723757

ABSTRACT:
A keyless entry system allows operation of various vehicle devices including a door lock without using a mechanical key, such as an ignition key. The system comprises a wireless, portable transmitter adapted to produce a radio signal indicative of a unique code preset in the transmitter, and a controller mounted on the vehicle and associated with the vehicle devices. The controller has a preset code to compare with the unique code indicative in the radio signal transmitted from the transmitter. The controller also detects impending or accomplished locking of the transmitter in the vehicle and produces an alarm and subsequently disables the keyless entry system unless the transmitter is removed from the vehicle within a given period of time after the alarm is given.

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