Patent ID: 7781920

Claim:
An electrical switching circuit comprising: a) a power input, which may vary over a large range of voltages, b) a power output, c) an RC circuit that provides a configurable delay, d) a momentary switch, and e) a bistable circuit comprising a first transistor and a second transistor and five resistors, f) each transistor having a positive terminal, a negative terminal, and a controlling terminal, g) said power output being connected to said power input through an electrically controlled switching device, so that said switching device controls current flowing to said output, h) the positive terminal of said first transistor being connected through the first resistor to the power input, i) the controlling terminal of said first transistor being connected through the second resistor to the power input, j) the controlling terminal of said first transistor being connected through the third resistor to the positive terminal of said second transistor, k) the negative terminal, of said first transistor being connected through the fourth resistor to the controlling terminal of said second transistor, and l) the controlling terminal of said second transistor being connected through the fifth resistor to ground, m) the negative terminal of said second transistor being connected directly to ground, n) said momentary switch connecting said RC circuit to the controlling terminal of said first transistor, and o) said electrically controlled switching device being connected to the positive terminal of said second transistor, which is the output of the bistable circuit, whereby said bistable circuit is stable in an on state, with both transistors turned on, and an off state, with both transistors completely off and consuming no power except for a small leakage current, and each time said momentary switch is closed, said power output is alternately connected to said power input and disconnected from said power input through said electrically controlled switching device.