STANDBY POWER SOURCE FOR AN AC ALARM SYSTEM

• US 3,746,878 A
• Filed: 03/15/1972
• Issued: 07/17/1973
• Est. Priority Date: 03/15/1972
• Status: Expired due to Term

• Current Assignee: George P. Viger Jr
• Original Assignee: George P. Viger Jr
• Inventors: Viger, George P. Jr.
• Primary Examiner(s): Hohauser, Herman J.
• Application Number:
  US05/234,906
• Time in Patent Office: 489 Days
• Field of Search: 307/66,64 340/276
• US Class Current: 307/66
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A standby power source connected to AC power mains for supplying AC power to an AC alarm system when there is a main power failure comprises a source of DC power, inverter means for converting DC power to AC power and controlled switching means for connecting the source of DC power to the inverter means and for transferring the connection of the AC alarm system from the AC power mains to the inverter means at the time of a power failure.

Claims

1. Apparatus for supplying AC power to an AC load comprising AC input means for receiving AC power from AC power mains, a battery, a battery charger having an input connected to said AC input means and an output, a battery having terminals, an inverter means for converting DC power to AC power and having an input for receiving DC power and an output for transmitting AC power, said inverter means including a solid state oscillator means which is energized to generate AC power upon the receipt of DC power, a first controlled switching means normally connecting saiD AC input means to the AC load, and when switched opening such connection a second controlled switching means normally connected the output of said battery charger to the terminals of said battery and when switched opening such connection, a third controlled switching means which is normally open and when switched connecting the terminals of said battery to the input of said inverter means for energizing said solid state oscillator means, fourth controlled switching means which is normally open and when switched connecting the output of said inverter means to the AC load, and control means connected to said AC input means and operative in the absence of AC power on the AC power mains for switching each of said switching means.

2. The apparatus of claim 1 wherein said control means is the winding means of a relay means and each of said controlled switching means is a contact means of said relay means.