Leroy Barron Baker

US Patent:

6608900, Aug 19, 2003

Filed:

Oct 1, 1998

Appl. No.:

09/164495

Inventors:

Edwin Glenn Yancey - Burleson TX
Leroy S. Baker - Colleyville TX
William I. H. Chen - Bedford TX

Assignee:

Marconi Communications, Inc. - Cleveland OH

International Classification:

H04M 1900

US Classification:

379413, 307 39, 307 41

Abstract:

A load management system for monitoring the output from a power supply and managing the load on said power supply, said load management system comprising a hysteresis circuit for signaling a load element to stop drawing current when an output voltage at said output falls below a first threshold and for signaling said load element to resume drawing current when said output voltage rises above a second threshold, said hysteresis circuit comprising a first state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than said first voltage threshold, a second state sensing circuit having an input coupled to said output and for signaling whether said output voltage is greater than or less than a second voltage threshold, and a state transition circuit having a first input coupled to the output of said first state sensing circuit and a second input coupled to the output of said second state sensing circuit, said state transition circuit having an output for setting a first control signal to a first state when said output voltage falls below said first threshold and resetting said first control signal to a second state when said output voltage rises above said second threshold.

US Patent:

39683338, Jul 6, 1976

Filed:

Sep 18, 1973

Appl. No.:

5/398448

Inventors:

Frank L. Simokat - Euless TX
LeRoy S. Baker - Grapevine TX

Assignee:

Superior Continental Corporation - Hickory NC

International Classification:

H04H 108
H04M 100

US Classification:

179 16A

Abstract:

A telephone transmission system in which a telephone transmission line connects a central office d. c. power source to a battery charging control circuit to apply an input voltage to the control circuit, in which a battery charger connects a rechargeable battery to said control circuit to draw battery charging current from the transmission line under the control of the control circuit, in which the control circuit is rendered effective by a lowering of the input voltage to at least a predetermined value to effectively disconnect the battery charger and the battery from the transmission line for a period that exceeds the interval in which the input voltage is lowered.