Remote actuating apparatus with long and short operating codes

Details Remote actuating apparatus with long and short operating codes Remote actuating apparatus with long and short operating codes

1996-01-19

1997-06-03

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082569, H04Q 100

Patent

active

056359136

ABSTRACT:
A garage door opening system comprises a receiver which is responsive both to security codes in a first format from existing transmitters and to security codes in a new and more secure format from new transmitters. The old format comprises a synchronization character and ten code words and the new code format advantageously comprises twenty code words with a new synchronization character between the tenth and eleventh code words. The receiver determines from the received synchronization codes the type of format being received and compares the received code words with stored permitted code words of the same type. When a match occurs, an activation signal is generated.

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