The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 1995
Filed:
Apr. 07, 1993
Shunichi Nagamoto, Nara, JP;
Takeshi Muramatu, Shizuoka, JP;
Yasuo Yoshimura, Yamatokoriyama, JP;
Masahiro Yamamoto, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
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.