Continuous lighting systems for gaseous-discharge lamps with incandescent lamps on standby

Claim 2

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source connected to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; and control means responsive to the extinguishment of said gaseousdischarge lamp for lighting said incandescent light means, said control means further responsive to the magnitude of the voltage across the gaseous-discharge lamp and the phase difference between said lamp voltage and said AC source voltage for extinguishing said incandescent light means after the gaseous-discharge lamp reignites and reaches a predetermined intensity.

Claim 3

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source connected to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first switch means responsive to a first predetermined voltage for lighting said incandescent light means; first integrator circuit means having an input connected to said voltage source and an output connected to said first switch means; second integrator circuit means having an input connected to said gaseous discharge lamp and an output; and second switch means responsive to the output of said second integrator circuit means having a second predetermined voltage and phase angle for preventing said output from said first integrator circuit from reaching said first predetermined voltage.

Claim 4

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source connected to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first switch means responsive to a first predetermined voltage for lighting said incandescent light means; first integrator circuit means having an input connected to said voltage source and an output connected to said first switch means; second integrator circuit means having an input connected to said gaseous discharge lamp and an output; and second switch means responsive to the output of said second integrator circuit means having a second predetermined voltage and phase angle for preventing said output from said first integrator circuit from reaching said first predetermined voltage.

Claim 5

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source connected to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means responsive to the source voltage and the voltage across the gaseous-discharge lamp being in phase for lighting said incandescent light means; and second circuit means responsive to the voltage across the gaseous-discharge lamp reaching a predetermined magnitude and leading the source voltage for disabling said first circuit means to extinguish said incandescent light means.

Claim 6

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source connected to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means responsive to the source voltage and the voltage across the gaseous-discharge lamp being in phase for lighting said incandescent light means; and second circuit means responsive to the voltage across the gaseous-discharge lamp reaching a predetermined magnitude and leading the source voltage for disabling said first circuit means to extinguish said incandescent light means.

Claim 7

A continuous lighting system as described in claim 3 wherein said first circuit means includes: first gated switch means connected in series with said incandescent light means and said voltage source; first integrator circuit means having an input connected to said voltage source and an output, and second switch means responsive to a predetermined output from said first integrator circuit means for applying a gating voltage to said first gated switch means to light said incandescent light means.

Claim 8

A continuous lighting system as described in claim 4 including: means for amplifying the gating voltage applied to said first gated switch means.

Claim 9

A continuous lighting system as described in claim 3 wherein said second circuit means includes: second integrator means having am input connected to said gaseous-discharge lamp and an output; and bypass circuit means responsive to an output from said second integrator means of a predetermined magnitude and phase angle for disabling said first Circuit means.

Claim 10

A continuous lighting system as described in claim 1 wherein said control means includes: first gated bilateral switch means connected in series with said incandescent light means and said voltage source; a first resistance and a first capacitance forming a first series combination, said first series combination connected in parallel across said first gated bilateral switch means; second bilateral switch means connecting the gate electrode of said first gated bilateral switch means with the juncture of said first resistance and said first capacitance; a voltage divider means connected across said gaseous-discharge lamp; third gated bilateral switch means connected across said first capacitance; fourth bilateral switch means connected to the gate electrode of said third gated bilateral switch means; a second resistance and a second capacitance connected in series with said fourth bilateral switch means; and means for connecting the juncture of said second resistance and said second capacitance to a preselected point on said voltage divider means.

Claim 11

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; power means for applying an AC voltage to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means responsive to a first voltage for applying voltage from said power means to said incandescent light means; second circuit means, connected to said gaseous-discharge lamp and said first circuit means, responsive to a second voltage greater than and leading said first voltage for disabling said first circuit means to extinguish said incandescent light means, said second leading voltage being applied when said gaseous-discharge lamp is lit and has reached a predetermined intensity.

Claim 12

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; power means for applying an AC voltage to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means responsive to a first voltage for applying voltage from said power means to said incandescent light means; second circuit means, connected to said gaseous-discharge lamp and said first circuit means, responsive to a second voltage greater than and leading said first voltage for disabling said first circuit means to extinguish said incandescent light means, said second leading voltage being applied when said gaseous-discharge lamp is lit and has reached a predetermined intensity.

Claim 13

A continuous lighting system as described in claim 8 wherein said first circuit means includes: first gated bilateral switch means connected in series with said incandescent light means and said power means; first integrator circuit means having an input connected to said power means and an output; and second bilateral switch means connecting the gate electrode of said first gated bilateral switch means with the output of said first integrator circuit means.

Claim 14

A continuous lighting system as described in claim 8 wherein said second circuit means includes: second integrator circuit means having an input connected to said gaseous-discharge lamp and an output; and bypass circuit means responsive to an output from said second integrator means of a predetermined magnitude and phase angle for disabling said first circuit means.

Claim 15

A continuous lighting system as described in claim 10 wherein said bypass circuit means includes: third gated bilateral switch means connected to disable said first integrator circuit means when conductive; and fourth bilateral switch means responsive to the output of said second integrator circuit means for applying a gate voltage to said third gated bilateral switch means.

Claim 16

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; power means for applying an AC voltage to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means, connected to said incandescent light means, responsive to a first trigger voltage for applying voltage from said power means to said incandescent light means; second circuit means, connected to said gaseous-discharge lamp and said first circuit means, said second circuit means normally being conductive and providing a voltage bypass from said first circuit means when said gaseous-discharge lamp is operating at a predetermined intensity preventing said first trigger voltage from being applied to Said first circuit means, said second circuit means being nonconductive in response to the extinguishment of said gaseous-discharge lamp to permit said first trigger voltage to be applied to said first circuit means to light said incandescent light means, said incandescent light means remaining lit until said second circuit means conducts in response to the gaseous-discharge lamp reigniting and reaching a predetermined intensity.

Claim 17

A continuous lighting system comprising: a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; power means for applying an AC voltage to said ballast means to ignite and operate said gaseous-discharge lamp; incandescent light means; first circuit means, connected to said incandescent light means, responsive to a first trigger voltage for applying voltage from said power means to said incandescent light means; second circuit means, connected to said gaseous-discharge lamp and said first circuit means, said second circuit means normally being conductive and providing a voltage bypass from said first circuit means when said gaseous-discharge lamp is operating at a predetermined intensity preventing said first trigger voltage from being applied to Said first circuit means, said second circuit means being nonconductive in response to the extinguishment of said gaseous-discharge lamp to permit said first trigger voltage to be applied to said first circuit means to light said incandescent light means, said incandescent light means remaining lit until said second circuit means conducts in response to the gaseous-discharge lamp reigniting and reaching a predetermined intensity.

Claim 18

A continuous lighting system comprising a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source; incandescent light means; a power circuit connected in series with said incandescent light means and said voltage source, said power circuit rendered conductive in response to a gating voltage; a trigger circuit for applying said gating voltage to said power circuit in response to a predetermined threshold voltage; an integrator circuit having an input connected to said voltage source and an output connected to said trigger circuit; a sensing circuit having an input connected to said gaseous-discharge lamp and an output; and a bypass circuit connected to the output of said sensing circuit; said by pass circuit conducting when said gaseous discharge lamp is lit and operating at a predetermined intensity to prevent said integrator circuit bypass applying the predetermined threshold voltage to said trigger circuit; said bypass circuit being nonconductive in response to the output of said sensing circuit indicating that the gaseous-discharge lamp is extinguished to permit said integrator circuit to apply the predetermined threshold voltage to said trigger circuit to enable said power circuit to light said incandescent light means.

Claim 19

A continuous lighting system comprising a gaseous-discharge lamp; lead ballast means connected to said gaseous-discharge lamp; an AC voltage source; incandescent light means; a power circuit connected in series with said incandescent light means and said voltage source, said power circuit rendered conductive in response to a gating voltage; a trigger circuit for applying said gating voltage to said power circuit in response to a predetermined threshold voltage; an integrator circuit having an input connected to said voltage source and an output connected to said trigger circuit; a sensing circuit having an input connected to said gaseous-discharge lamp and an output; and a bypass circuit connected to the output of said sensing circuit; said by pass circuit conducting when said gaseous discharge lamp is lit and operating at a predetermined intensity to prevent said integrator circuit bypass applying the predetermined threshold voltage to said trigger circuit; said bypass circuit being nonconductive in response to the output of said sensing circuit indicating that the gaseous-discharge lamp is extinguished to permit said integrator circuit to apply the predetermined threshold voltage to said trigger circuit to enable said power circuit to light said incandescent light means.