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:
Nov. 29, 1988
Filed:
Sep. 17, 1984
Fritz H Johansson, Mesa, AZ (US);
Other;
Abstract
In a system in which a power supply provides power to a plurality of remote devices and sensoring devices, apparatus for applying an initial control signal to the power source lines activates a clock/logic network associated with each group of remote sensoring devices and load devices. The initial control signal defines and synchronizes a plurality of time intervals following the initial control signal. A sensor associated with a clock/logic apparatus can apply a signal to the power line during a time interval that can be interpreted by the control apparatus as an indication of a state of the associated sensor. Similarly, the clock/logic apparatus can enable a load element during a pre-established time interval following the initial control signal, however, the load element can be activated only if the control apparatus applies a signal to the power lines during the pre-established period. The system thus utilized the power conductors to communicate control information and sensor data between a control apparatus and remote devices.