Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7256549 | Three electrode arc-discharge lamp A method of operating an arc discharge lamp that has first and second electrodes is described. First, the first electrode is heated with a third electrode with a first arc until the first electrode temperature is sufficiently elevated to allow for thermionic emissio... | 08/14/2007 |
| 7150923 | Chrome coating composition A metallic coating composition and vacuum metalization process for applying the coating composition on various substrates, for example vehicle wheels, hub caps, bumpers and the like. The process is environmentally compatible and produces a decorative, wear-resistant... | 12/19/2006 |
| 7102298 | Integral lamp An integrated lamp/lamp electronics unit includes a lamp having a first end with first end electrical terminals, and a second end with second end electrical terminals. An end cap having an interior section is placed into electrical connection with the first end elec... | 09/05/2006 |
| 6288491 | Metal halide lamp To achieve the foregoing objects and in accordance with the purpose of the invention, as embodied and broadly described herein, the metal halide lamp of this invention comprises a vitreous arc tube containing an ionizable medium and having electrodes seal... | 09/11/2001 |
| 6118222 | Circuit for complementing an AC mains voltage, particularly for resistive loads A circuit for complementing the AC mains supply voltage, particularly for resistive loads, comprising a rectifier inserted between an AC power source and a resistive load and adapted to prevent the reverse flow of a processed portion of the AC supply volt... | 09/12/2000 |
| 5331250 | Thick film resistor for use in a vacuum and a high pressure discharge lamp having such a resistor A high pressure discharge lamp having a thick film resistor comprising a plurality of resistive elements. A first resistive element is included in a starting circuit for the lamp and a second resistive element is in series with the arc tube during lamp op... | 07/19/1994 |
| 5327046 | High pressure discharge lamp having overcurrent fuse protection A high intensity discharge (HID) lamp includes a resistive fuse for overcurrent protection of its associated ballast, which fuse is connected electrically in series with the discharge vessel of the lamp and continuously dissipates power during lamp operat... | 07/05/1994 |
| 5159242 | High pressure discharge lamp having an integral thick film resistor with multiple resistive elements A high pressure discharge lamp having a thick film resistor comprising a plurality of resistive elements. A first resistive element is included in a starting circuit for the lamp and a second resistive element is in series with the arc tube during lamp op... | 10/27/1992 |
| 5017833 | Pilot light assembly The assembly comprises a light-emitting diode (28) and associated circuit components (38, R1-R4) mounted on a printed circuit board (26) all mounted within a housing (10) formed with securement means such as a screw thread (14) for mounting the assembly i... | 05/21/1991 |
| 4988921 | Lamp with integral automatic light control circuit A lamp assembly includes a sealed lamp envelope enclosing a filament, a lamp base affixed to the lamp envelope and including a connector, and an automatic light control circuit located in the lamp base and electrically connected between the connector and ... | 01/29/1991 |
| 4792726 | Fluorescent lamp unit with integral ballast housing A fluorescent lamp unit adapted for use in an incandescent lamp socket includes a tube, a cap member having a base wall in which the tube is fixed, and a ballast housing having a primary cavity which is substantially defined by a circumferential wall and ... | 12/20/1988 |
| 4786842 | Resistor assembly A resistor assembly built into an electron tube, comprising a resistor element having at least one hole, an inner connector fitted in the hole, and an outer connector which formed integrally with the inner connector, or fixed thereto. The inner connector ... | 11/22/1988 |
| 4550275 | High efficiency pulse ultraviolet light source A high efficiency pulsed ultraviolet light source is provided which comprises a flashlamp containing a noble gas, for example xenon, at low pressure, and having a pair of electrodes between which a discharge through the gas may be impressed, and an electr... | 10/29/1985 |
| 4547704 | Higher efficiency incandescent lighting units An improved high efficiency general service incandescent lighting unit is disclosed. The lamp has coaxial outer and inner envelopes. The inner envelope has a low voltage filament coaxially disposed therein, a halogen gas atmosphere and a fill-gas at a hig... | 10/15/1985 |
| 4383204 | Three-level interface control circuit for electronically ballasted lamp An interface control circuit for use with a standard three-way, four-switch-position lamp socket to allow a fluorescent lamp-electronic ballast combination to be controlled to provide a selected one of four light output levels, utilizes a three-input, ful... | 05/10/1983 |
| 4316121 | Integrally ballasted fluorescent lamp unit An integrally connected fluorescent lamp and ballast unit having an elongated ballast of wire wound around and along an elongated magnetizable core and extending alongside an elongated lamp bulb. The elongated lamp and ballast can be straight, or can be c... | 02/16/1982 |
| 4234818 | Electric mixed light lamp Mixed light lamps require a complicated construction so as to be able to suspend the filament and the discharge lamp. In a mixed light lamp according to the invention a bipartite filament of coiled-coil wire is used, the parts of which are each stretched ... | 11/18/1980 |
| 4210838 | Gas discharge display panel In a gas discharge display panel consisting of a matrix of discharge cells defined by gas filled cavities in a block and having cathodes formed by sets of conductors on an end plate sealing the cavities and in which the matrix includes priming cells which... | 07/01/1980 |
| 4115722 | Corona-shield for an image-tube photocathode A hollow cylindrical member composed of a high-voltage potting material is secured adjacent the photocathode to the high-voltage potting material encircling the image-tube. The hollow member is concentric with the axis of the tube and extends away from th... | 09/19/1978 |
| 4020388 | Discharge device A discharge device for igniting a fuel-air mixture whereby fuel droplets in the mixture are electrically charged and, under the influence of an electric field, caused to congregate at a region thereby concentrating the mixture at said region, means being ... | 04/26/1977 |
| 3953808 | Solid state amplifier A solid state amplifier includes at least one junction field effect transistor and an impedance network coupled between a signal input terminal of the amplifier and a gate terminal of the transistor. The network includes a p-n junction device having a reg... | 04/27/1976 |
