Single pulse generating circuit

Claim 2

A pulse generating circuit for applying a pulse to a device comprising capacitor means having first and second terminals, a charging path, a discharge path including first switching means, normally closed switching means connected between said charging path and said capacitor means first terminal, normally open switching means connected between said discharge path and said capacitor means first terminal, and second means responsive to a first signal for opening said normally closed switching means and for closing said normally open switching means after a predetermined time delay, said capacitor means second terminal being connected to said second means, and means for applying a second signal from said device to said first switching means to complete said discharge path after said time delay.

Claim 3

A pulse generating circuit according to claim 1 wherein said discharge path switching means comprises a transistor having a base, an emitter and a collector, said emitter being connected to a reference potential, said collector being connected to said normally open switching means and said base being connected to said second signal applying means.

Claim 4

A pulse generating circuit according to claim 2 wherein said discharge path comprises diode coupling means having one terminal connected to said device, and said first signAl applying means comprises a switch connected between said capacitor second terminal and the other terminal of said diode coupling means.

Claim 5

A pulse generating circuit for applying a pulse to a device comprising capacitor means having first and second terminals, a charging path, a discharge path including first switching means, relay means having a normally closed contact pair connected between said charging path and said capacitor means first terminal, a normally open contact pair connected between said discharge path and said capacitor means first terminal, said relay means having a third terminal and being operative in response to a first signal being applied to said third terminal to disconnect said normally closed contact pair and to connect said normally open contact pair after a predetermined time delay, said capacitor means second terminal being connected to said third terminal, and means for applying a second signal from said device to said first switching means to complete said discharge path after said time delay.

Claim 6

A pulse generating circuit for applying a pulse to a device comprising capacitor means having first and second terminals, a charging path, a discharge path including first switching means, relay means having a normally closed contact pair connected between said charging path and said capacitor means first terminal, a normally open contact pair connected between said discharge path and said capacitor means first terminal, said relay means having a third terminal and being operative in response to a first signal being applied to said third terminal to disconnect said normally closed contact pair and to connect said normally open contact pair after a predetermined time delay, said capacitor means second terminal being connected to said third terminal, and means for applying a second signal from said device to said first switching means to complete said discharge path after said time delay.

Claim 7

A circuit for generating and applying a single pulse to a device comprising a capacitor having first and second terminals, means for charging said capacitor, means for discharging said capacitor including switching means, a switch connected to said second terminal, relay means responsive to the closing of said switch for transferring said first terminal from said charging means to said discharging means after a predetermined time interval, and means for applying a signal from said device to said switching means to discharge said capacitor whereby a single pulse is applied to said device upon the application of said signal after said time interval.

Claim 8

A circuit for generating and applying a single pulse to a device comprising a capacitor having first and second terminals, means for charging said capacitor, means for discharging said capacitor including switching means, a switch connected to said second terminal, relay means responsive to the closing of said switch for transferring said first terminal from said charging means to said discharging means after a predetermined time interval, and means for applying a signal from said device to said switching means to discharge said capacitor whereby a single pulse is applied to said device upon the application of said signal after said time interval.

Claim 9

A circuit for generating and applying a single pulse to a device according to claim 5 wherein said device signal applying means comprises means responsive to the discharge of said capacitor for terminating the signal from said device whereby the duration of said single pulse is controlled.

Claim 10

A circuit for generating and applying a single pulse to an output lead comprising a voltage source, a capacitor having first and second terminals, a relay, a first path including a manual switch connecting said relay to said voltage source, a second path including normally closed contacts of said relay connecting said voltage source to said capacitor first terminal, diode means connecting the output lead to said switch in said first path, transistor switching means including a control electrode, means including normally open contacts of said relay connected between said capacitor first terminal and said transistor switching means for discharging said capacitor through said transistor switching means and said switch in said first path, and means for enabling said transistor switching means to complete said discharge path, said enabling means including means for applying a signal to said control electrode.

Claim 11

A circuit for generating and applying a single pulse to an output lead comprising a voltage source, a capacitor having first and second terminals, a relay, a first path including a manual switch connecting said relay to said voltage source, a second path including normally closed contacts of said relay connecting said voltage source to said capacitor first terminal, diode means connecting the output lead to said switch in said first path, transistor switching means including a control electrode, means including normally open contacts of said relay connected between said capacitor first terminal and said transistor switching means for discharging said capacitor through said transistor switching means and said switch in said first path, and means for enabling said transistor switching means to complete said discharge path, said enabling means including means for applying a signal to said control electrode.