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:
Mar. 02, 1976
Filed:
Jan. 31, 1975
Ian A Whyte, Pittsburgh, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A distribution network power line communication system including a central communication terminal at a distribution substation in signal communication with a plurality of remote communication terminals via the electrical distribution power lines. The central communication terminal uniquely addresses a selected remote communication terminal with an interrogation signal which requests the performance of a selected distribution automation function. The selected remote communication terminal performs the requested function and sends a response signal back to the central communication terminal. Signal amplifying repeaters are disposed in signal communication with the electrical distribution power lines, which ensure that the interrogation and response signals are at usable signal levels when they reach their intended destinations. The signal amplifying repeaters include delay devices which provide a signal delay time interval selected such that a repeater will not apply a signal to the electrical distribution power lines at the same time a signal is to be received by the repeater. In one embodiment, the message elements or bits of a signal word are spaced such that each bit of the word is delayed and transmitted by a repeater before the repeater receives the next bit of the word; and, in another embodiment the complete signal word is received by a repeater before the transmitter portion of the repeater is operated.