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| Number | Title | Issue Date |
| 4814663 | Fluorescent lamp for unipolar mode of operation For far-reaching reduction of cataphoresis of a fluorescent lamp for unipolar mode of operation, the anode thereof is such that in order to decrease anode current density its surface effective for the formation of the electric field of discharge amounts t... | 03/21/1989 |
| 4806817 | Filament supporting multi-planar wire insert for electric incandescent lamp A multi-planar, one-piece wire insert for supporting a coil filament body in an electric incadescent lamp in which the wire insert includes a top leg disposed in a plane out of the main plane of the insert so as to permit the coil filament body, as wound,... | 02/21/1989 |
| 4779739 | Method and apparatus for conductive film detection The apparatus is used for detecting the proper conductivity of a conductive film enclosed within a nonconductive substrate or envelope such as a fluorescent lamp without requiring physical contact with the fluorescent lamp. The conductive film detector co... | 10/25/1988 |
| 4680509 | Method and apparatus for starting high intensity discharge lamps A light source including a spiral line pulse generator having an output coupled to one electrode of a high pressure discharge lamp and having an input for coupling to a source of lamp operating power for providing high voltage lamp starting pulses. The pu... | 07/14/1987 |
| 4678968 | High intensity discharge lamp starting and operating apparatus Starting and operating apparatus for high intensity discharge lamps includes first and second pairs of terminals formed for connection to an AC source and a discharge lamp respectively, a series connect ballast means and inductor connected to one of said ... | 07/07/1987 |
| 4605981 | Industrial or domestic overvoltage protective device The device includes two detectors of overvoltage (8, 9) each connected between a respective one of a pair of power line conductors (1, 2) and a respective input of an arrester (7). The outputs of the detectors are connected to an OR-gate (10) the output s... | 08/12/1986 |
| 4596681 | Method of forming capsules containing a precise amount of material A method of forming a sealed capsule containing a submilligram quantity of mercury or the like, the capsule being constructed from a hollow glass tube, by placing a globule or droplet of the mercury in the tube. The tube is then evacuated and sealed and i... | 06/24/1986 |
| 4482799 | Evaporation heater An evaporation heater having a wire wound into a coil and a support wire which extends from one arm of the wire outside of the coil, in spaced proximity therewith, to a central position within the coil but out of electric contact therewith is disclosed. A... | 11/13/1984 |
| 4480296 | Two-filament lamp for automobile headlight A tungsten-halogen lamp for use in an automobile headlight comprises a tubular sealed glass capsule containing two coiled tungsten filaments for high and low beam operation, respectively. The low beam filament is disposed substantially orthogonal to a ver... | 10/30/1984 |
| 4470801 | Photoflash unit with circuit pattern for redundant switching of lamps A photoflash unit comprising a plurality of 2n flashlamps attached to a printed circuit board and disposed in a linear array with the longitudinal axes of respective lamps aligned in parallel. Circuit patterns on the circuit board include a plurality of n... | 09/11/1984 |
| 4437966 | Sputtering cathode apparatus A sputtering cathode apparatus for the deposition of thin films which are produced at a relatively high deposition rate. A relatively large planar magnetron sputtering system or apparatus is provided with a preferred single convoluted electron path so as ... | 03/20/1984 |
| 4434386 | Process and apparatus for forming lamp capsules A process for forming lamp capsules such as in the manufacture of miniature arc lamps wherein the bulb portion of the capsule is formed by blowing molten glass into a mold while simultaneously press sealing the lead assembly. The molding and sealing proce... | 02/28/1984 |
| 4415836 | Lamp with improved fuse wire In an incandescent lamp having a glass envelope joined to a base member and a filament mounted within the envelope, an improved fuse wire comprises a portion of one or both of the lead-in wires connecting the filament to the base member. The fuse wire is ... | 11/15/1983 |
| 4415427 | Thin film deposition by sputtering The deposition of thin films is carried out by a co-sputtering cathode technique particularly suited for deposition of doped thin films on large area substrates. A relatively large planar magnetron sputtering apparatus having a rectangular (picture frame ... | 11/15/1983 |
| 4413206 | Metal halide arc discharge lamp having electrolysis prevention means A high-pressure metal halide arc discharge lamp having an arc tube with a pair of main electrodes disposed within the tube at opposite ends and a starting electrode located adjacent one of the main electrodes. A tubular sleeve of insulating material, such... | 11/01/1983 |
| 4401913 | Discharge lamp with mount providing self centering and thermal expansion compensation A high pressure sodium vapor discharge lamp having an arc tube coaxially mounted within an outer glass envelope by means including a coiled spring engaging one end of the arc tube and coaxially disposed in the partially compressed state between that end o... | 08/30/1983 |
| 4392089 | Isolator for use with frequency responsive switching circuit A frequency responsive power control system includes an improved isolator in series electrical connection with respect to a ballasted lamp load. The isolator has a high inductive impedance at low current for blocking ballast induced noise signals from int... | 07/05/1983 |
| 4384563 | Apparatus for redirection of fuel-air mixture in carburetion system In an apparatus for preheating a fuel-air mixture mounted in the flow of that mixture between a carburetor and the intake manifold of a combustion engine wherein such mixture is passed through a multi-passaged PTC resistor heater into such engine manifold... | 05/24/1983 |
| 4373146 | Method and circuit for operating discharge lamp A method of operating a high intensity discharge lamp having a pair of electrodes hermetically sealed within an arc tube, the method comprising frequency modulation of a carrier waveform in the kilohertz range to provide a variable frequency AC output, an... | 02/08/1983 |
| 4371915 | Photoflash unit with reflector recesses for circuit board switches A photoflash unit comprising a plurality of 2n flashlamps attached to a printed circuit board and disposed in a linear array with the longitudinal axes of respective lamps aligned in parallel. The circuit board has a substantially rectangular portion with... | 02/01/1983 |
| 4371914 | Photoflash unit with circuit board radiation switches for selective pairing of lamps A photoflash unit comprising a plurality of 2n flashlamps attached to a printed circuit board and disposed in a linear array with the longitudinal axes of respective lamps aligned in parallel. Circuit patterns on the circuit board include a plurality of n... | 02/01/1983 |
| 4369028 | Photoflash lamp A high-voltage type photoflash lamp having an ignition structure including an improved primer material for the reliable ignition of filamentary combustible material distributed within the oxygen-filled envelope of the lamp. The primer material comprises a... | 01/18/1983 |
| 4359665 | Filament support for tubular lamp A wire support for the coiled-coil filament of a tubular double-ended incandescent lamp in which the support is formed of a single wire which extends longitudinally along a portion of the inner wall of the lamp envelope, with each end of the support wire ... | 11/16/1982 |
| 4355261 | Discharge lamp with integral starter A low wattage high intensity discharge lamp having a quartz arc tube and a glow starter disposed within a bulbous glass envelope containing an inert gas, such as argon, at subatmospheric pressure. The starter within the envelope comprises a first bimetal ... | 10/19/1982 |
| 4355264 | Starter circuit for discharge lamp A starter circuit for a high power discharge lamp connected to an AC source via a series inductor. The starter circuit comprises a capacitor connected in series with a triac across the lamp, and a branch including a first resistor connected in series with... | 10/19/1982 |
| 4355265 | Discharge lamp starting and operating circuit A circuit for starting and operating a low wattage high intensity discharge lamp from a source of AC line voltage. The circuit includes a glow starter device having a first terminal connected to a first bimetal, a second terminal connected to a second bim... | 10/19/1982 |
| 4355345 | High current draining capacity micro-lightning arrester A lightning arrester including a metallic enclosure with an opening, a first electrode of electrically conducting metal traversing the enclosure opening and having a first discharge surface within the enclosure, a plug of electrically insulating material ... | 10/19/1982 |
| 4348615 | Discharge lamp operating circuit A lamp operating circuit comprising a DC power source, an inverter including step-up transformer inductance windings and a controlled transistor switch connected across the output of the DC source, and a high frequency oscillator coupled to the transistor... | 09/07/1982 |
| 4345178 | High intensity reflector lamp A reflector lamp comprises an arc discharge tube disposed at about the focus of a parabolic reflector. The arc tube is supported by two lead-in support wires which extend through the back of the reflector. The external ends of the lead-in support wires ar... | 08/17/1982 |
| 4336570 | Radiation switch for photoflash unit A photoflash unit having a plurality of flashlamps mounted on a printed circuit board containing circuitry for sequentially igniting the flashlamps in response to successive firing pulses applied thereto. The circuitry includes a plurality of solid-state ... | 06/22/1982 |
| 4334856 | Photoflash array with selective pairing of lamps A photoflash lamp array having a plurality of 2n flashlamps, a common terminal connected to one lead-in wire of each of the lamps, and a plurality of n selective terminal means, each associated with a respective pair of the lamps and directly connected to... | 06/15/1982 |
| 4330821 | Radiation switch for photoflash unit A photoflash unit having a plurality of flashlamps mounted in a planar array on a printed circuit board containing circuitry for sequentially igniting the flashlamps in response to successive firing pulses applied thereto. The circuitry includes a plurali... | 05/18/1982 |
| 4329621 | Starter and discharge lamp starting circuit A glow bottle starter having three lead-in wires and containing two bimetals connected together at one end and a rigid tungsten rod. The bimetals make normally closed contact with the tungsten rod in the quiescent state of the starter, and upon electrical... | 05/11/1982 |
| 4326241 | Multilamp photoflash unit A photoflash unit comprising a horizontal linear array of flashlamps enclosed within a one-piece housing member having a light-transmitting front portion folded over a back portion containing a plurality of lamp-receiving cavities in which respective lamp... | 04/20/1982 |
| 4326242 | Multilamp photoflash unit having secured housing A photoflash unit comprising a horizontal linear array of photoflash lamp enclosed within a one-piece housing member having a light-transmitting front portion folded-over a back portion containing a plurality of lamp-receiving cavities in which respective... | 04/20/1982 |
| 4326240 | Multilamp photoflash unit having engageable connector tab A photoflash unit comprising a horizontal linear array of flashlamps enclosed within a one-piece housing member having a light-transmitting front portion folded over a back portion containing a plurality of lamp-receiving cavities in which respective lamp... | 04/20/1982 |
| 4324543 | Photoflash array with selective pairing of lamps and switching of common circuit A photoflash lamp array having a plurality of 2n flashlamps, a plurality of n selective terminal means, each associated with a respective pair of the lamps and connected to one lead-in wire of each of the lamps of the associated pair, and a common termina... | 04/13/1982 |
| 4325104 | Multilamp photoflash unit with functional label A photoflash unit comprising a horizontal linear array of flashlamps enclosed within a one-piece housing member having a light-transmitting front portion folded-over a back portion containing a plurality of lamp-receiving cavities in which respective lamp... | 04/13/1982 |
| 4323824 | Low voltage fluorescent operating circuit A circuit for starting and operating a low-voltage fluorescent lamp from a 120 volt AC supply. The circuit includes a choke type ballast connected in series with the lamp and inductively coupled to a pulse train generator comprising an RC energy storage c... | 04/06/1982 |
| 4322783 | Lamp with improved mount A tungsten-halogen exposure lamp having a tubular envelope of quartz or high silica glass has a pinch seal at each end with a pair of stiff lead-in wires respectively extending therefrom. Attached to each lead-in wire is an open ended spade lug having a U... | 03/30/1982 |
