Remote equipment control system with low duty cycle communications link
US4245347A · kind A · utility
Inventors
Key dates
| Filing date | Jan 18, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jan 18, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C19/28
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a remote equipment control system having a low duty cycle communications link between a remote command transmitter and a remote receiver. The remote receiver is controllingly coupled to the equipment. The remote command transmitter includes a means to transmit a message signal of set time duration at a preselected message separation interval. The message signal has a unique address portion and a command portion. The remote receiver includes a decoding unit and a timing circuit. The decoding unit is responsive to the unique address portion of a received message to provide an enabling signal to be delivered to the timing circuit. The timing circuit upon receipt of the enabling signal provides an output to the decoding unit to prevent entry of any message signal to the decoder for a time duration matching the preselected message separation interval and allowing entry of a message signal for a time duration matching the time duration of the message signal. The enabling signal also conditions the decoder to accept the next arriving message signal allowed entry which has the unique address, whereupon the message signal command portion is decoded and a command…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.