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| Number | Title | Issue Date |
| 4771257 | Ballast transformer with bobbins coils Coil bobbins are disclosed having flanged coil support portions provided with outboard terminal housings projecting beyond the flange rim and defining inwardly extending terminal-receiving cavities. The end walls of the housings are slotted to allow a wir... | 09/13/1988 |
| 4756701 | Method of making a tungsten-halogen lamps having an enhanced temperature gradient Incandescent lamps having an improved light source are disclosed. The light source contains a halogen compound along with a fill-gas at a pressure above atmospheric. The light source has an oblate ellipsoidal shape so as to obtain a desired temperature gr... | 07/12/1988 |
| 4754201 | Magnetic low load factor series ballast circuit A series ballast circuit for operating a gas discharge tube from a constant current alternating voltage source having a fundamental frequency is disclosed. The primary feature of the ballast circuit comprises a ballast transformer having a magnetic core a... | 06/28/1988 |
| 4754373 | Automotive headlamp An improved vehicle headlamp for developing forward illumination and having reduced dimensions relative to prior art headlamps is disclosed. The lamp comprises an enclosed concave parabolic reflector of a rectangular cross section type and having a single... | 06/28/1988 |
| 4749913 | Operating circuit for a direct current discharge lamp A power supply for a metal halide discharge lamp includes a circuit for applying a high voltage starting pulse to the arc tube of the lamp to initiate the discharge, a glow transition current to provide power transitioning the arc tube from its glow to it... | 06/07/1988 |
| 4746075 | Precision coil winding machine and method A method and apparatus for precision winding of coils on bobbins. Ideal positions for all portions of wire on the bobbin are predetermined on the basis of a planned winding profile taking into account number of turns, wire size and bobbin dimensions. Then... | 05/24/1988 |
| 4743803 | General service tungsten-halogen incandescent lamp having improved filament shock resistance A mounting arrangement for disposing a light source comprising an inner envelope within an outer envelope with both envelopes comprising a general service tungsten-halogen incandescent lamp is disclosed. The mounting arrangement has parameters which are s... | 05/10/1988 |
| 4739436 | Surge suppression circuit A voltage surge suppression circuit employs two series connected metal oxide varistors and a power interrupter to provide suppression of all modes of voltage surge while providing protection against failure of either metal oxide varistor. An indicator is ... | 04/19/1988 |
| 4737475 | Arsenic-free lead silicate vacuum tube glass A glass composition specially useful in the glass envelope of TV receiver tubes and which is of the lead silicate type is disclosed comprising in weight percent 30-65% SiO2, 20-40% PbO, 5-20% alkali metal oxides, 0-2% Al2 O3 | 04/12/1988 |
| 4730178 | Bobbins coils with terminal housing Coil bobbins are disclosed having flanged coil support portions provided with outboard terminal housings projecting beyond the flange rim and defining inwardly extending terminal-receiving cavities. The end walls of the housings are slotted to allow a wir... | 03/08/1988 |
| 4723097 | Rapid restrike metal halide lamp and a method of operating such A rapid restrike metal halide lamp and method of operating such a lamp are disclosed which are particularly suitable for sports stadium lighting applications. The rapid restrike metal halide lamp has an arc tube containing constituents which require a wav... | 02/02/1988 |
| 4721935 | Bobbins coils with terminal housing Coil bobbins are disclosed having flanged coil support portions provided with outboard terminal housings projecting beyond the flange rim and defining inwardly extending terminal-receiving cavities. The end walls of the housings are slotted to allow a wir... | 01/26/1988 |
| 4717857 | Fluorescent lamp producing white color illumination with multiple phosphor combination A fluorescent lamp utilizing a four component phosphor combination is provided producing efficient white color illumination at a lower cost than conventional phosphor coatings of the same type. A lamp color temperature of approximately 3500° K. is produc... | 01/05/1988 |
| 4714847 | Advanced piezoeceramic power switching devices employing protective gastight enclosure and method of manufacture This application describes a number of novel advanced piezoelectric ceramic power switching devices which are mounted within protective gastight enclosures that are either evacuated to a high degree of vacuum or filled with an inert gas protective atmosph... | 12/22/1987 |
| 4707636 | High pressure sodium vapor lamp with PCA arc tube and end closures An improved high pressure sodium lamp is described utilizing a polycrystalline alumina arc tube that is hermetically sealed, at least at one end, with a polycrystalline alumina end closure. Said end closure novel member is shaped as a flat disc having the... | 11/17/1987 |
| 4704665 | Corrosion resistant electric luminaire having rigid internal support structure An electric luminaire is provided having an interior comprised of weather and corrosion resistant housing of non-metallic material, such as plastic. The housing defines an internal cavity, in which the electrical components of the luminaire reside, entire... | 11/03/1987 |
| 4704563 | Fluorescent lamp operating circuit A fluorescent lamp operating circuit includes a high frequency electronic ballast circuit for providing a controlled output to a fluorescent lamp load. A control signal is detected from the power line carrier which includes binary data indicative of the i... | 11/03/1987 |
| 4704661 | Faceted reflector for headlamps A multi-faceted reflector for a headlamp of a motor vehicle is disclosed. The motor vehicle headlamp has the desired optics, in the form of facets, placed entirely on the reflective surfaces of the reflector. The reflective surfaces are comprised of a plu... | 11/03/1987 |
| 4698549 | D.C. lamp discharge gas pumping control An amalgam of mercury is placed at the anode end of a low-pressure mercury discharge lamp for D.C. operation to counteract mercury vapor depletion at the anode end of the lamp. The amalgam attracts mercury vapor to the anode end of the lamp when the lamp ... | 10/06/1987 |
| 4695768 | Bimetal switch for electrode heat cutout within an electrically insulating support A fluorescent lamp electrode heat cutout switch is provided for placement within a fluorescent lamp stem and outside the discharge envelope and is configured such that a resistive heater wire is connected to one electrode lead-in and a bimetallic switch e... | 09/22/1987 |
| 4691341 | Method of transferring digital information and street lighting control system Remote control of street lights utilizes a programmable computer which generates wavelike control signals at fundamental frequencies in the voice range and having half periods corresponding in time-duration to the pulses used for binary digits in logic ci... | 09/01/1987 |
| 4690727 | Glaze polishing polycrystalline alumina material Increased optical transmission is provided for a body of optically transparent polycrystalline alumina by coating at least one major surface of said alumina body with a solid glaze coating and subsequently melting said coating at elevated temperatures to ... | 09/01/1987 |
| 4689517 | Advanced piezoceramic power switching devices employing protective gastight enclosure and method of manufacture This application describes a number of novel advanced piezoelectric ceramic power switching devices which are mounted within protective gastight enclosures that are either evacuated to a high degree of vacuum or filled with an inert gas protective atmosph... | 08/25/1987 |
| 4686411 | Incandescent lamp having an improved axial mounting structure for a filament An improved mounting structure for spatially disposing from its long axial conductive member, a filament within the outer envelope of an incandescent lamp is disclosed. The mounting structure offsets the filament from the centerline of the lamp and from i... | 08/11/1987 |
| 4680508 | Load control circuit An electrical load controller includes a combination of switches for selecting a desired load output level, an electronic custom gate array for converting the switch signals to a parallel binary number, a parallel to serial data encoder for converting the... | 07/14/1987 |
| 4678957 | Piezoelectric ceramic switching devices and systems and methods of making the same Improved piezoelectric ceramic switching devices are described along with their method of fabrication. In addition to the devices themselves, novel electric circuits are described for the energization as well as the use of such devices as switching elemen... | 07/07/1987 |
| 4679126 | Miniature lamp arrays having improved lamp retention features A decorative string set used for Christmas lighting is disclosed. The string set comprises various embodiments of clamping means which provide positive retention of incandescent lamps to their respective electrical sockets.... | 07/07/1987 |
| 4677081 | Arsenic-free lead silicate vacuum tube glass A glass composition specially useful in the glass envelope of TV receiver tubes and which is of the lead silicate type is disclosed comprising in weight percent 30-65% SiO2, 20-40% PbO, 5-20% alkali metal oxides, 0-2% Al2 O3 | 06/30/1987 |
| 4675794 | Adjustable mount for a high intensity lamp A fixture for a high intensity discharge lamp includes a support mechanism allowing the adjustable positioning of the lamp relative to the reflector within the fixture in order to control the beam spread of the light output of the lamp and fixture combina... | 06/23/1987 |
| 4675579 | Coupling of carrier signal from power line The AC power line to a street luminaire carries a 200 KHz carrier signal for operating a switching relay that connects a dimming reactor in series with the discharge lamp. A pick-off transformer has a primary winding connected in series with the ballastin... | 06/23/1987 |
| 4674017 | Plastic PAR lamp construction An improved plastic reflector member for a parabolic aluminized reflector (PAR) lamp is disclosed and, in particular, the use of said improved plastic reflector member for an all plastic PAR lamp or a PAR lamp which uses said improved reflector member. Sa... | 06/16/1987 |
| 4670682 | Piezoelectric ceramic switching devices and systems and method of making the same Improved piezoelectric ceramic switching devices are described along with their method of fabrication. In addition to the devices themselves, novel electric circuits are described for the energization as well as the use of such devices as switching elemen... | 06/02/1987 |
| 4665471 | Sealed headlamp An all glass sealed beam headlamp unit is disclosed having polygon shaped lens and reflector members which is capable of being alternately sealed together with an adhesive as well as being fusion sealed by reason of the sealing rim construction being empl... | 05/12/1987 |
| 4661821 | Vandalism-resistant UHF antenna A vandalism-resistant antenna for the UHF band comprises a ring-shaped radiator printed on a dielectric board or disc mounted within a shallow enclosure of insulating material having high impact strength. The radiator is approximately 1/4 wavelength long ... | 04/28/1987 |
| 4658154 | Piezoelectric relay switching circuit To control the operation of a piezoelectric relay, control circuitry is disclosed for direct ohmic connection to a utility AC source to draw the minimal power required to actuate the relay's bimorph member pursuant to selectively switching power current t... | 04/14/1987 |
| 4658178 | Plastics skirt for rigidly interconnecting metallic base and glass envelope of a lamp A lamp is disclosed comprising a light source, an outer glass envelope having at least one dimple, a metallic base having at least one dimple, and a plastics skirt having means for complementary engaging and fastening to each of the dimples of the glass e... | 04/14/1987 |
| 4655536 | Plug arrangement for electric cord set A female plug body for an electric cord set with at least two contact openings, one opening smaller than the other, has an insert made of a more rigid insulating material than the plug body, disposed within the plug body. The insert has a pair of cavities... | 04/07/1987 |
| 4655491 | Luminaire latch A two-part latch comprising hinged bail and crank for latching a globe and ring assembly to a fixed housing requires no screws, rivets or similar discrete fastening means. The crank member is a rectangular link formed from a length of resilient wire havin... | 04/07/1987 |
| 4656386 | R lamp having an improved dome portion for increasing the useful light output A reflector lamp (R) having an improved dome section that increases the useful light output of the lamp is disclosed. The dome section has at least three portions each with a predetermined radius. The overall dimensions of the dome section are decreased r... | 04/07/1987 |
| 4654560 | Three (3)-way lamp having a tungsten halogen inner envelope A three (3)-way lamp having a tungsten halogen-cycle inner envelope and an operating circuit for the inner envelope is disclosed. The operating circuit comprises a ballast element and two diodes lodged within the confines of the base of the lamp. The oper... | 03/31/1987 |
