U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Combined signal and electrical power distribution system

Patent 5068890 Issued on November 26, 1991. Estimated Expiration Date: Icon_subject August 6, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3842320

Electrical conductor assembly
Patent #: 4533790
Issued on: 08/06/1985
Inventor: Johnston ,   et al.

Communication and energy control system for houses
Patent #: 4899217
Issued on: 02/06/1990
Inventor: MacFadyen, et al.

Cordless telephone with battery saving function Patent #: 4939770
Issued on: 07/03/1990
Inventor: Makino

Inventor

Application

No. 562897 filed on 08/06/1990

US Classes:

379/90.01, TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE)307/147, CONDUCTOR ARRANGEMENTS OR STRUCTURE307/155, Plural diverse load devices379/397, Wire distribution455/402Over power line

Examiners

Primary: Schreyer, Stafford D.

International Classes

H04M 011/00
H01B 007/00
H04Q 007/04

Abstract

In a combined telephone and electric power distribution system, both telephone signals and electric power are distributed by way of a common distribution system wherein signal conducting means (such as optical fibers) and electric power conducting means are routed alongside each other to/from various utilization points, such as to/from a telephone instrument, a computer, an electric lighting fixture and/or a power receptacle. At some of these utilization points, telephone signal receptacles are provided alongside electric power receptacles. At other points, the signal conducting means is terminated in a radio transceiver and wireless signal radiation/receiving means. In a typical situation, such a transceiver has its antenna mounted at or near a ceiling lighting fixture; which radio antenna interacts with some other transceiver combined with a telephone and/or other information-handling apparatus located nearby. In addition to being used for transmitting telephone and/or other information signals, the signal conducting means is used for controlling the flow and/or usage of electric power, such as control of light from individual lighting fixtures, for distributed protection against electrical circuit overload and/or fire hazards. Also included is a provision for supplying uninterruptible power to selected utilization points.

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