Patents Represented by Attorney Lawrence R. Kempton

Find this attorney in the Justia Lawyer Directory

  • Color improvement of high pressure sodium vapor lamps by pulsed operation
    Patent number: 4137484
    Abstract: High pressure sodium vapor lamps containing sodium or both sodium and mercury are raised in color temperature and improved in color rendition by pulse operation. During the pulse there is considerable enhancement and broadening of the sodium lines at 449, 467, 498 and 568 nm and the development of a continuum from 400 to 450 nms, and also the appearance of visible mercury lines in lamps containing mercury. Optimum results with lamps in size ratings from 50 to 1000 watts are obtained with pulse repetition rates from 500 to 2000 Hz and duty cycles from 10 to 35%. The color temperature may be increased from the common value of 2050.degree. K to 2500.degree. K with reduction in lamp efficacy of only about 20% from conventional 60 Hz operation. Even higher color temperatures may be obtained if further reduction of efficacy is acceptable.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: January 30, 1979
    Assignee: General Electric Company
    Inventor: Mitchell M. Osteen
  • Photoflash lamp array circuit board having electrical insulation
    Patent number: 4136376
    Abstract: An electrically insulative adhesive coating for a circuit board used with a photoflash lamp array to provide sequential firing of the flash lamps. The circuit board includes the lamp firing circuitry along with switching elements connected in said circuitry and the insulative coating prevents electrical shorting of the circuitry. In a preferred embodiment, the coating material may be an organic polymer and may be provided with openings to permit radiation transfer from the flashing lamps to the underlying switches which are radiation-responsive.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventors: David H. Green, Edward J. Collins, Vaughn C. Sterling
  • Photoflash lamp array having reflector at rear of transparent circuit board
    Patent number: 4136378
    Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of transparent electrically insulating material having a light-reflecting coating on its rear for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventor: Harihar D. Chevali
  • Shield connection in photoflash array
    Patent number: 4136375
    Abstract: Flash lamp lead-in wires are embedded in a circuit board and are in contact with circuit runs carried by the board. The end of one lead-in wire of at least one of the lamps extends from the circuit board and makes electrical contact against a sheet-like shield member. In a preferred method the lead-in wires of a lamp are driven through the circuit board by ultrasonic drivers offset from each other so as to drive against one lead-in wire closer to its end than is the other.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventor: Norman E. Kewley
  • Electrode-inlead for miniature discharge lamps
    Patent number: 4136298
    Abstract: An electrode-inlead assembly comprises a small tungsten pin which is joined on axis to a fine molybdenum wire adapted to sealing through fused silica. The join is effected by a laser butt weld which permits a symmetric compact seal thereby making possible very small discharge envelopes having minimum end losses. The seal may be effected either by a foliated portion in the wire which is wetted by fused silica, or by a glass bead formed around the wire which wets both wire and fused silica.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventor: Richard L. Hansler
  • Photoflash lamp array having reflective circuit board
    Patent number: 4136379
    Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of an electrically insulating material having a light-reflecting surface for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventor: Harihar D. Chevali
  • Photoflash lamp array circuit board having radiation sensitive fuse elements
    Patent number: 4133631
    Abstract: Fuse elements are used with a circuit board to provide more reliable sequential firing in a flash lamp array. The circuit board includes the lamp firing circuitry along with radiation switches connected in said circuitry and the fuse elements cooperate with said radiation switches in the circuit operation. Fuse elements are deposited on the circuit pattern adjacent to the flash lamps for actuation by radiation being emitted therefrom and the activated fuse elements interrupt the circuit path by thermal action. In a preferred embodiment, the circuit board is constructed from an organic polymer and the fuse elements are deposited at circuit locations wherein the underlying substrate has a thickness less than the substrate thickness elsewhere to produce holes in the circuit board by melting or thermal decomposition.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: January 9, 1979
    Assignee: General Electric Company
    Inventors: Edward J. Collins, Vaughn C. Sterling
  • Flash lamp array having electrical shield
    Patent number: 4133023
    Abstract: A photoflash lamp array comprising a housing elongated vertically and containing elongated flash lamps lying horizontally and stacked vertically, the flash lamps having lead-in wires extending from ends thereof near the sides of the housing and connected to a circuit board located behind the lamps. A conductive sheet-like shield is positioned between the circuit board and the rear of the housing and is contoured to have side portions extending frontwardly and between the lamp ends and the sides of the housing. Electrically insulative flash indicator material is positioned on the front surface of the shield and extends along the inside surfaces of the shield's frontwardly extending portions so as to prevent the lamp's lead-in wires from becoming shorted against the shield.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: January 2, 1979
    Assignee: General Electric Company
    Inventor: James M. Hanson
  • Lead wires for incandescent lamp
    Patent number: 4131819
    Abstract: Lead wires having a specified stiffness, ie. stress/strain, characteristic are described for use in an incandescent lamp.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: December 26, 1978
    Assignee: General Electric Company
    Inventor: James A. Graves
  • Lamp parts feeding device having rotating reference frame
    Patent number: 4131192
    Abstract: A parts feeder is disclosed in which randomly grouped parts are stored, oriented and discharged at a uniform rate from a rotating or indexing spacer wheel fed by stepwise movable supply apparatus having the rotating spacer wheel as its frame of reference.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: December 26, 1978
    Assignee: General Electric Company
    Inventor: Thomas M. Cipolla
  • Sealed beam lamp unit
    Patent number: 4128864
    Abstract: An improved pressed glass lens member for a sealed beam lamp unit is provided to include an outer sealing rim of varying thickness to compensate for thermal contraction of the lens member when molded in a predetermined manner. Specifically, the ordinary warped condition encountered with thermal contraction of the pressed glass article when initially formed is compensated for so as to permit subsequent heat sealing with a pressed glass reflector member by thermally fusing the glass material of both members in the sealing regions and without encountering the manufacturing defects now being experienced. The preferred embodiments illustrate such controlled thickness variation of the body section in the outer sealing rim region of a pressed glass lens member for both circular-shaped and rectangular-shaped lens configurations.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventors: Warren T. Brussee, William G. Ferris
  • Multiple flashlamp system
    Patent number: 4128858
    Abstract: A multiple photoflash system is provided which employs a high voltage type flashlamp construction, including a shorting primer material. The primer material is converted to a conductive residue upon ignition of flashlamp to provide a short circuit path between spaced apart inleads of the lamp. Further series connection of the individual lamps in the flashlamp system which are operatively associated with switching devices to provide an open circuit condition upon flashing of the associated lamps permits sequential flashing. The particular primer material which enables the flashlamp system to be operated in this manner comprises a solid mixture of a combustible metal fuel and an oxidizer for the fuel such as alkaline metal chlorates and perchlorates, and which further contains particular proportions of various combustion supporting oxides.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: December 5, 1978
    Assignee: General Electric Company
    Inventors: Vaughn C. Sterling, Lewis J. Schupp
  • Ceramic base for glass halogen lamps
    Patent number: 4126810
    Abstract: A ceramic base is added to a glass halogen lamp to improve the electrical performance and ease of use of the lamp.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: November 21, 1978
    Assignee: General Electric Company
    Inventor: Charles W. Cox
  • Photoflash lamp array having high voltage shorting type flash lamps and radiation sensitive switching elements
    Patent number: 4118758
    Abstract: Radiation sensitive switches which undergo thermal decomposition to physically interrupt the circuit path when activated are operatively associated with a plurality of high voltage flash lamps utilizing a shorting primer material to provide an electrical path across said lamps after flashing as the means of enabling the flash lamps to be sequentially flashed in a high-voltage activated multiple flash lamp array. The thermal decomposition of the radiation sensitive switching elements produces self-destruction of the switch elements per se and which can be accompanied by further destruction of the underlying substrate on which the switch elements have been deposited. The switching elements are deposited on a circuit board member and electrically connected in the sequential lamp firing circuitry at circuit board locations adjacent to the associated flash lamps.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: October 3, 1978
    Assignee: General Electric Company
    Inventors: Dominic A. Cusano, Harold F. Webster
  • Method for preparing thermoluminescent materials utilizing rare earth oxyhalides activated with terbium
    Patent number: 4116865
    Abstract: Thermoluminescent materials have been found suitable for measuring long term exposures to low level ionizing radiation. Oxyhalides of lanthanum, gadolinium and yttrium, including the oxychlorides and oxybromides are activated with terbium and have been found to be most efficient oxygen dominated phosphors having thermoradiant efficiencies with excitation by low level ionizing radiation. Thermoluminescence response increases when the previous materials have elemental hafnium and zirconium additives. The thermoluminescent oxyhalide of the invention is prepared by forming mixed oxalates of the metal constituents, firing the mixed oxalates in air to form an oxide mixture, blending the oxide mixture with an ammonium halide and firing the resultant mixture to form the oxyhalide.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: September 26, 1978
    Assignee: General Electric Company
    Inventor: Jacob G. Rabatin
  • Hydraulic gimbal system for beam projection lamps
    Patent number: 4111562
    Abstract: A gimbal system is disclosed in which low static friction hydraulic motors drive two concentric movable rings in orthogonal planes. For each ring, the drive shaft of the motor is part of one supporting axle. The other supporting axle is coupled to a shaft position encoder. The motor is mounted so that only rotational motion is imparted to the ring, and the encoder is mounted so that only rotational motion is read out.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: September 5, 1978
    Assignee: General Electric Company
    Inventor: Antonin J. Dvorak
  • Lead-in seal and lamp utilizing same
    Patent number: 4110657
    Abstract: A lead-in seal of the type having a metal foil seal member sealed into an envelope, comprising a relatively narrow intermediate foil tab member connected between the foil seal member and a conductor. The result is reduced stress in the seal and less likelihood of cracking.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: August 29, 1978
    Assignee: General Electric Company
    Inventor: John C. Sobieski
  • Gas mixer
    Patent number: 4110067
    Abstract: An improved gas mixer is described in which combustible or explosive mixtures of gases are formed in a confined area on the outside surface of the mixer.
    Type: Grant
    Filed: August 31, 1976
    Date of Patent: August 29, 1978
    Assignee: General Electric Company
    Inventors: Harold G. Anderson, Jeuel E. Guess
  • High-temperature glass composition
    Patent number: 4105826
    Abstract: Aluminosilicate glasses containing BaO and CaO are provided having combined high softening points along with exceptionally low liquidus temperatures. These glasses are within the following compositional limits in percent by weight:______________________________________ Percentage Oxides Range ______________________________________ SiO.sub.2 55-68 Al.sub.2 O.sub.3 15-18 CaO 7-13 BaO 6-16 ______________________________________except for incidental impurities, residual fluxes and refining agents. The weight ratio of Al.sub.2 O.sub.3 to combined weight ratio of CaO and BaO in the present glass composition is maintained in the range 0.6:1 to 1:1. Such glasses provide an improved hermetic seal for high temperature lamp envelopes.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: August 8, 1978
    Assignee: General Electric Company
    Inventor: George L. Thomas
  • Metal halide lamp having open tungsten coil electrodes
    Patent number: 4105908
    Abstract: In a metal halide lamp of the sodium-scandium-thorium iodide type utilizing tungsten electrodes without emission mix, lumen depreciation during life results primarily from blackening of the arc tube wall by electrode sputtering during the glow-to-arc transition phase of lamp start-up. The glow-to-arc transition is speeded up by a lower glow-to-arc transition voltage which is achieved by using electrodes comprising an open tungsten wire coil on a tungsten shank, the coil comprising two layers of a composite wire made by open-winding a 2 mil overwind on a 4 mil core and then close-winding two layers of the composite wire on the shank. This decreases sputtering at starting and improves lamp maintenance.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: August 8, 1978
    Assignee: General Electric Company
    Inventors: Thomas J. Harding, Wayne R. Hellman