Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-04-07
1995-08-29
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082569, G05B 2302
Patent
active
054464536
ABSTRACT:
A residential facility control system transmits data as a radio signal between host and subsidiary apparatus. Transmitting and receiving devices of the host and subsidiary apparatus are reduced in power consumption. A transmitting circuit of the transmitting device of the transmitting and receiving apparatus is supplied with power from a transmitting circuit power source control in synchronization with a first timing signal from a first timer for a period of time which is necessary for transmission. A receiving circuit of the receiving device of the transmitting and receiving device is supplied with power from a receiving circuit power source control for a shorter period of time in synchronization with a second timing signal from a second timer which is synchronized with the first timing signal. When the receiving circuit receives a signal for the shorter power supply period of time, the receiving power source control maintains power supply to the receiving circuit for a period of time which is necessary to receive the signal. Synchronization between the first and second timing signals is achieved by initializing the second timer by way of timer synchronization device each time when the receiving device receives an effective signal or by regularly transmitting a forced synchronization signal to the receiving device from a forced synchronization signal generator provided in the transmitting device and by receiving the synchronization signal at the receiving device to initialize the second timer by way of the timer synchronization device.
REFERENCES:
patent: 4577315 (1986-03-01), Otsuka
patent: 4688036 (1987-08-01), Hirano et al.
patent: 4839645 (1989-06-01), Lill
patent: 4843384 (1989-06-01), Ide et al.
patent: 5150954 (1992-09-01), Hoff
Muramatu Takeshi
Nagamoto Shun'ichi
Yamamoto Masahiro
Yoshimura Yasuo
Holloway III Edwin C.
Matsushita Electric - Industrial Co., Ltd.
Yusko Donald J.
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