Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-01-06
1987-08-11
Weldon, Ulysses
Communications: electrical
Continuously variable indicating
With meter reading
34082531, 34082534, 34082572, 34082556, G08C 1900, G06F 704
Patent
active
046865292
ABSTRACT:
A remote-control lock system has a transmitter that can emit any of a set formed of a multiplicity of differently coded signals, a receiver that can be set to respond to any of the signals, and a lock operable by the receiver when it receives a signal it is set to. The set of signals the transmitter can emit includes a subset formed by a succession of different main signals and another subset formed by a succession of different synchronization signals. The transmitter is initially set to emit on normal actuation a predetermined one of the main signals and on special actuation a predetermined one of the synchronization signals and the receiver is set to respond only to the predetermined one main signal and to the predetermined synchronization signal to operate the lock. Thereafter on normal actuation of the transmitter, after each emission by the transmitter and reception by the receiver of the main signal they are both set to, the transmitter and receiver are both reset to the next of the main signals in the succession. On special actuation of the transmitter, after each emission by the transmitter and reception by the receiver of the synchronization signal they are both set to and after reception by the receiver of a main signal the receiver is not set to, the transmitter and receiver are reset to the next of the synchronization signals. When the end of either set of signals is reached the transmitter and receiver are reset to the first of the respective signal sets.
REFERENCES:
patent: 3860922 (1975-01-01), Wagner
patent: 4194201 (1980-03-01), Stein
patent: 4236068 (1980-11-01), Walton
patent: 4492959 (1985-01-01), Mochida et al.
patent: 4529980 (1985-07-01), Liotine et al.
patent: 4535333 (1985-08-01), Twardowski
patent: 4596985 (1986-06-01), Bongard et al.
Dubno Herbert
Kiekert GmbH & Co. Kommanditgesellschaft
Ross Karl F.
Smith Ralph E.
Telefunken electronic GmbH
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