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Control of power supply

  • US 4,237,385 A
  • Filed: 11/03/1978
  • Issued: 12/02/1980
  • Est. Priority Date: 11/04/1977
  • Status: Expired due to Term
First Claim
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1. A control system for a power supply comprising a controlled battery change over switch, a battery connected to said controlled battery change over switch which connects said battery to battery charging means, when a mains supply is operative in association with said change over switch, or to a load to be supplied with battery power when said mains supply fails after having been operatively connected, and wherein when the battery voltage, during discharge through the load, has fallen to a predetermined value, a battery voltage detector generates a signal operative to effect switching of said change over switch to disconnect said battery from said load and connect said battery to the charging means.

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