| Patent Number |
Title Of Patent |
Date Issued |
| D309956 |
Front lens for high intensity strobe flash lamp |
August 14, 1990 |
|
| 5523654 |
Flashtube trigger circuit with anode voltage boost feature |
June 4, 1996 |
| This circuit facilitates the triggerability of a remote three wire flashtube and trigger coil assembly at a much lower than normal anode power supply voltage. The discharge of the trigger capacitor produces the usual trigger-event in the trigger coil. Simultaneously, a trigger boost |
| 5519389 |
Signal synchronized digital frequency discriminator |
May 21, 1996 |
| A digital frequency discriminator processes input pulses including first and second time separated input pulses to determine if the frequency of any two sequential pulses lie within a predetermined frequency band with upper and lower frequency limits and that they are received for at lea |
| 5060131 |
DC to DC converter power supply with feedback controlled constant current output |
October 22, 1991 |
| A power supply includes a coupled inductor having a primary winding, a secondary winding and a feedback winding. A rectifier/filter is coupled to the secondary winding for supplying the load with a DC current. A power switch is coupled in series with the primary winding for switching bet |
| 4956584 |
Strobe trigger pulse generator |
September 11, 1990 |
| A strobe trigger pulse generator includes a power supply, an energy storage capacitor coupled to the power supply and a trigger pulse generator which intermittently energizes a trigger pulse transformer to ionize the gaseous interior of a strobe flash lamp. The trigger pulse generator in |
| 4954753 |
Strobe flash lamp power supply with input voltage feedthrough afterflow prevention circuit |
September 4, 1990 |
| The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching |
| 4953062 |
Strobe flash lamp with focussed front beam and collimated lateral beams |
August 28, 1990 |
| A light fixture includes a parabolic reflector, a light source positioned at the focal point of the parabolic reflector and a lens assembly. The lens assembly includes a front lens for transmitting the primary beam reflected from the parabolic reflector. The lens assembly also includes a |
| 4949017 |
Strobe trigger pulse generator |
August 14, 1990 |
| A strobe trigger pulse generator includes a power supply, an energy storage capacitorcoupled to the power supply and a trigger pulse generator which intermittently generates trigger pulses to energize a trigger pulse transformer. The pulse generator includes a trigger capacitor having fi |
| 4870551 |
Strobe flash lamp with focussed front beam and collimated lateral beams |
September 26, 1989 |
| A light fixture includes a parabolic reflector, a light source positioned at the focal point of the parabolic reflector and a lens assembly. The lens assembly includes a front lens for transmitting the primary beam reflected from the parabolic reflector. The lens assembly also includes a |
| 4839782 |
Weatherproof lighting fixture with hermetically sealed base plate |
June 13, 1989 |
| An optically transmissive, substantially cylindrical enclosure surrounds a light source. A generally circular base includes a vertically oriented first flange section dimensioned to fit coaxially within a vertically oriented lower section of the enclosure. The base includes a horizontall |
| 4805077 |
Lighting fixture having a sealed, weatherproof secondary cover |
February 14, 1989 |
| A light source is positioned within a substantially cylindrical, optically transparent enclosure having a load supporting base. The exterior surface of the enclosure includes a light converging lens having a plurality of jagged edges subject to contamination by dirt and moisture. An opti |
| 4800323 |
Single-ended self-oscillating dc-dc converter for intermittently energized load having V.sub.BE |
January 24, 1989 |
| The converter delivers current to an intermittently energized load and includes a coupled inductor having a primary winding, a secondary winding and a feedback winding. A switching transistor is coupled in series with the primary winding of the inductor and switches between conductive an |
| 4779027 |
DC to DC converter with overvoltage protection circuit |
October 18, 1988 |
| An overvoltage protection circuit limits the output voltage of a DC to DC converter to a maximum desired output voltage. An output voltage sensing circuit includes a semiconductor device such as a sidac having a normal resistive region of operation as well as a negative resistance region |
| 4775821 |
Variable input voltage DC to DC converter with switching transistor drive current regulator |
October 4, 1988 |
| The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching |
| 4755723 |
Strobe flash lamp power supply with afterglow prevention circuit |
July 5, 1988 |
| A variable frequency DC to DC converter generates a pulsed, variable magnitude output voltage where the frequency of the pulsed output voltage varies with changes in the magnitude of the output voltage. An energy storage capacitor is coupled between the converter coupled inductor and |
| 4701672 |
Strobe flash monitor |
October 20, 1987 |
| The operation of a strobe lighting system is electronically monitored from a remote location to verify proper operation of all of the individual elements of the system. A current sensor is coupled in series with the flow of current between the strobe power supply and the strobe lamp and |
| 4682081 |
Single-ended, self-oscillating DC-DC converter for intermittently energized load having V.sub.BE |
July 21, 1987 |
| The converter delivers current to an intermittently energized load and includes a coupled inductor having a primary winding, a secondary winding and a feedback winding. A switching translator is coupled in series with the primary winding of the inductor and switches between conductive an |
| 4648781 |
Automatic control system for a releasable vehicle locking device |
March 10, 1987 |
| A vehicle to loading dock releasable locking unit includes a hook for engaging a coupling on the vehicle, a motorized drive system for rotating the hook back and forth between locked and unlocked positions, and a hook position sensor for sensing whether the hook is in the locked, the |
