Isaac L Flory

47630442, Aug 9, 1988

Apr 6, 1987

7/035243

Joe A. Nuckolls - Blacksburg VA
Isaac L. Flory - Harrisonburg VA

Hubbell Incorporated - Orange CT

H05B 4126
H01J 6196

315176

A starting, hot restarting and operating circuit includes a pulse circuit for applying high voltage pulses to an HID lamp for starting or hot restarting. After a set interval of pulses if the lamp has not ignited, the pulse circuit is turned off for a selected inactive interval after which pulses are applied to the lamp again. If ignition does not occur after several active/inactive cycles, the circuit is deactivated until reset by turning the power off and on.

48109363, Mar 7, 1989

Dec 1, 1986

6/936231

Joe A. Nuckolls - Blacksburg VA
Isaac L. Flory - Harrisonburg VA

Hubbell Incorporated - Orange CT

H05B 3700

315119

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.