US3859562A — Flash device

Claim 1

Independent Claim 144 words

A flash device, comprising a power source, a main capacitor charged by said power source, a discharge circuit for said main capacitor, a flash discharge tube which is provided in the discharge circuit, said discharge tube having a trigger electrode for triggering discharge, a diode in said discharge circuit, a transformer having a primary winding and having a secondary winding connected in series with the diode in the discharge circuit, a synchronizing contact switch connected to the primary winding for triggering said discharge tube, trigger means having a trigger capacitor and a trigger coil coupled with the trigger electrode, and an auxiliary capacitor connected in parallel with said diode and the secondary winding for charging during trigger operation to add to the magnitude of the voltage applied by said main capacitor to the discharge tube and for discharging during discharge of the discharge tube.

Claim 2

Dependent Claim 144 words

A flash device, comprising a power source, a main capacitor charged by said power source, a discharge circuit for said main capacitor, a flash discharge tube which is provided in the discharge circuit, said discharge tube having a trigger electrode for triggering discharge, a diode in said discharge circuit, a transformer having a primary winding and having a secondary winding connected in series with the diode in the discharge circuit, a synchronizing contact switch connected to the primary winding for triggering said discharge tube, trigger means having a trigger capacitor and a trigger coil coupled with the trigger electrode, and an auxiliary capacitor connected in parallel with said diode and the secondary winding for charging during trigger operation to add to the magnitude of the voltage applied by said main capacitor to the discharge tube and for discharging during discharge of the discharge tube.

Claim 3

Dependent Claim 37 words

A flash device as in claim 1, wherein said trigger coil includes a primary winding and said synchronizing contact is connected in both the primary winding of the trigger coil and the primary winding of the transformer.

Claim 4

Dependent Claim 132 words

A discharge system for operating a flash unit from a power source, comprising discharge capacitor means for coupling across the power source, circuit means for coupling said capacitor means across the flash unit and for applying the voltage appearing at said capacitor means across the unit, triggering means to be coupled to said flash unit for applying a trigger pulse to the flash unit, said circuit means including a capacitor to be connected in series with the flash unit and control means coupled to said trigger means for charging the capacitor with a voltage that increases the magnitude of the voltage applied by said capacitor means across the unit, said control means including a path means for forming a discharge path for current through the unit, said path means including a diode.

Claim 5

Dependent Claim 132 words

A discharge system for operating a flash unit from a power source, comprising discharge capacitor means for coupling across the power source, circuit means for coupling said capacitor means across the flash unit and for applying the voltage appearing at said capacitor means across the unit, triggering means to be coupled to said flash unit for applying a trigger pulse to the flash unit, said circuit means including a capacitor to be connected in series with the flash unit and control means coupled to said trigger means for charging the capacitor with a voltage that increases the magnitude of the voltage applied by said capacitor means across the unit, said control means including a path means for forming a discharge path for current through the unit, said path means including a diode.

Claim 6

Dependent Claim 23 words

A system as in claim 3, wherein the diode is poled for discharging current from said capacitor means when the flash unit discharges.

Claim 7

Dependent Claim 18 words

A system as in claim 3, wherein said control means includes a transformer coupled to said triggering means.

Claim 8

Dependent Claim 32 words

A system as in claim 3, wherein said control means includes a transformer coupled to said triggering means and said transfoRmer has a secondary winding forming a part of said path means.

Claim 9

Dependent Claim 13 words

A system as in claim 6, wherein said path means includes a diode.

Claim 10

Dependent Claim 17 words

A system as in claim 7, wherein said secondary winding and said diode are connected in series.

Claim 11

Dependent Claim 40 words

A system as in claim 7, wherein said secondary winding and said diode are connected in series with each other as well as in series with the unit, and wherein said capacitor is connected across said diode in said secondary.

Claim 12

Dependent Claim 26 words

A system as in claim 9, wherein said diode is poled for producing easy current flow for discharge of said capacitor means when the unit discharges.

Claim 13

Dependent Claim 32 words

A system as in claim 10 wherein said transformer secondary is wound to cause said trigger capacitor to increase the magnitude of the voltage applied by said capacitor means to the unit.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-01-06	1978-07-08	1979-01-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-01-06	1982-07-08	1983-01-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-01-06	1986-07-08	1987-01-07	$7700.00	Window Closed / Lapsed

Flash device

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