0-10V dimming interface protection circuit

Apparatus for predicting incipient failure of an X-ray generator

Automatic alarm for fluorescent blinking

Burnout protection for lamps wired in series

Cathode ray storage tube having a target dielectric provided wit

Circuit continuity and function monitor

Circuit for selectively exciting one of a pair of light emitting

Circuit status indicating device with improved switch on/off det

Communication system for single point emergency lighting

Current monitoring

Discharge lamp having a visual-change timer

Disconnection detecting circuit of double-filament spherical lam

Display device having signal lamps

Drive circuit for driving indicators in computer system

Dual LED/incandescent security fixture

Externally mountable discharge lamp ignition circuit having visu

Externally mountable discharge lamp ignition circuit having...

Flash monitor alarm system

Flasher with audible indicator

Flicker detecting system for detecting lamp life differing...