Electric lamp and discharge devices: systems – With automatic shunt and/or cutout
Patent
1986-12-01
1989-03-07
Boudreau, Leo H.
Electric lamp and discharge devices: systems
With automatic shunt and/or cutout
315120, 315129, 315136, 315289, 361 93, H05B 3700
Patent
active
048109363
ABSTRACT:
A discharge lamp monitoring and deactivating circuit includes a normally closed switch in series with the discharge lamp and its ballast and a detector circuit connected across the lamp to monitor lamp operating voltage. The detector circuit includes a capacitor which is charged and discharged through separate paths so that a lamp electrical waveform change waveform can be detected, resulting in a net charge. The charge is used to open the switch after a time delay which is only manually resetable.
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Flory Isaac L.
Nuckolls Joe A.
'Hubbell Incorporated
Boudreau Leo H.
Farley Walter C.
Presson Jerry M.
Razavi Michael
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