Master clock standby switching circuitry

Claim 2

A power system for energizing a load comprising: a bias network means; means for connecting a main source of power to energize said bias network means; means for connecting a standby source of power to energize said bias network means in the event of main power failure; an output line means, connected to said means for connecting a main source, for transmitting a signal indicative of the presence of power from the main source of power; oscillator means energized by said bias network means for generating a first repetitive output signal; means, connected to said oscillator means and said output line means, for generating a second repetitive output signal in accordance with said first repetitive output signal and the presence of energization on the output line means due to main power presence and a third repetitive output signal in accordance with said first repetitive output signal and the lack of energization on the output line means due to main power loss; and means, responsive to said means for generating the second and third repetitive output signals, for producing controlled output pulses for energizing the load.

Claim 3

The invention of claim 1 further including a diode and adjustable resistor connecting the bias network means to the means for connecting a main source of power, the polarity of the diode being such as to enable energization of the bias network means and charging of the standby source of power by the main source of power during operation.

Claim 4

The invention of claim 1 wherein the second repetitive output signal takes the form of a pulse train having a frequency which is less than the frequency of the first and third repetitive output signals.

Claim 5

The invention of claim 3 whErein the frequencies of the first and third repetitive output signals are equal.

Claim 6

The invention of claim 1 wherein the means responsive to said means for generating the second and third repetitive output signals includes a bistable flip-flop connected to the bias network means and having a pair of outputs for energizing the load.

Claim 7

The invention of claim 1 wherein the means responsive to said means for generating the second and third repetitive output signals includes a frequency divider.

Claim 8

The invention of claim 6 wherein the frequency divider produces an output pulse in response to a given number of input pulses or after a predetermined time.

Claim 9

The invention of claim 1 wherein the means for generating the second and third repetitive output signals is a switching and synchronizing circuit comprising a transistor stage having an input connected to the oscillator means and an output and means responsive to the presence of a signal on the output line means for shorting the input of the transistor stage.

Claim 10

The invention of claim 8 wherein the means for shorting comprises a transistor having its collector and emitter connected across the intput of the transistor stage, and its base connected to the output line means.

Claim 11

The invention of claim 9 including differentiator means connected between the output of the transistor stage and the means for producing controlled output pulses for energizing the load.

Claim 12

The invention of claim 10 wherein the means for producing controlled output pulses includes a frequency divider responsive to the differentiator means and a bistable flip-flop motor driver stage controlled by the frequency divider.

Claim 13

A power system for continuously pulsing a load at a given frequency during switch-over between main and standby sources of power comprising: a bias network means; means for connecting a main source of power to energize said bias network means; means for connecting a standby source of power to energize said bias network means in the event of main power failure; an output line means, connected to said means for connecting a main source, for transmitting a signal indicative of the presence of power from the main source of power; oscillator means energized by said bias network means for generating a repetitive signal at a frequency greater than said given frequency; means, connected to said oscillator means and said output line means, for generating pulses at a lesser frequency than said greater frequency in accordance with the greater frequency repetitive output signal from said oscillator means and the presence of energization of the output line means due to main power presence and at said greater frequency in accordance with the greater frequency repetitive output signal from said oscillator means and the lack of energization on the output line means due to main power loss; and means responsive to said pulses for producing controlled output pulses at said given frequency for application to the load.

Claim 14

A power system for continuously pulsing a load at a given frequency during switch-over between main and standby sources of power comprising: a bias network means; means for connecting a main source of power to energize said bias network means; means for connecting a standby source of power to energize said bias network means in the event of main power failure; an output line means, connected to said means for connecting a main source, for transmitting a signal indicative of the presence of power from the main source of power; oscillator means energized by said bias network means for generating a repetitive signal at a frequency greater than said given frequency; means, connected to said oscillator means and said output line means, for generating pulses at a lesser frequency than said greater frequency in accordance with the greater frequency repetitive output signal from said oscillator means and the presence of energization of the output line means due to main power presence and at said greater frequency in accordance with the greater frequency repetitive output signal from said oscillator means and the lack of energization on the output line means due to main power loss; and means responsive to said pulses for producing controlled output pulses at said given frequency for application to the load.

Claim 15

The invention of claim 12 wherein the means responsive to pulses for producing controlled output pulses comprises a frequency divider which generates an output pulse in response to a given number of input pulses or after a perdetermined time.