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:
May. 29, 1979
Filed:
Feb. 28, 1978
Charles M Miller, Detroit, MI (US);
Systems Technology Corporation, Detroit, MI (US);
Abstract
A central processor exercises on-off power control over a number of widely spaced loads and determines the status of the loads through a system which includes a transmitter-receiver terminal at each load and a common data bus connecting the central station to all of the transmitter-receivers. Each receiver has a unique address and the processor addresses one of the receivers by sending a message consisting of the receiver's address plus a command signal over the bus. A valid message consists of two sequential transmissions of the unit's address and the combination of command signals that accompany these addresses determines the function that is enabled at the receiver. All transmissions are serial and repeaters interposed in the bus restore signal levels and provide power to nearby terminals.