Power conservation circuit

Details Power conservation circuit Power conservation circuit

1995-06-06

1996-10-15

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

307116, 307126, 307125, 307 64, 307 66, 323234, 323236, 361 18, H02J 306

Patent

active

055657141

ABSTRACT:
A power conservation circuit having a low voltage power supply for powering a first and second switch. The first switch connects output terminals to either the low voltage power supply or a powered device. The second switch connects or disconnects power to the powered device. The low voltage power supply provides a sensing current when a load is placed across the output terminals. The current goes to a control switch which causes the first and second switches to switch into the ON state. A sensing circuit detects the continued draw of current from the powered device while a load is present. The sensing circuit maintains the control switch in the ON state. In the absence of any loads on the output terminals, the sensing circuit causes the control switch to switch the first and second switches into the OFF state. In the OFF state, power is disconnected from the powered device thereby conserving power when there is no load requesting the use of the powered device.

REFERENCES:
patent: 4237385 (1980-12-01), Jurgens et al.
patent: 4428015 (1984-01-01), Nesler
patent: 5272382 (1993-12-01), Heald et al.
patent: 5306955 (1994-04-01), Fryer
patent: 5387858 (1995-07-01), Bender et al.

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