Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4524344 | Electric fuse An electric fuse includes a tube of insulating material with first and second open ends. Metallic or electrically conducting end caps are placed on each of the first and second ends. A fuse element is mounted with the tube in electrical contact with the e... | 06/18/1985 |
| 4518185 | Die handling device A die handling device for lifting and moving die sets includes a pair of clamps for holding a die shoe of the die set. Each clamp includes a body with first and second parallel extensions. Each extension includes an aperture. A portion of a die shoe is po... | 05/21/1985 |
| 4517544 | Time delay electric fuse A time delay fuse includes a tubular housing of insulative material with first and second open ends. First and second metallic or electrically conductive ferrules are mounted on the first and second ends, respectively, of the tubular housing. A core is po... | 05/14/1985 |
| 4511874 | Fatigue-resistant fuse strip An electrical fuse comprises a fusible ribbon having one or more weak spots along its axial length which is highly resistant to mechanical fatigue caused by cyclic heating and cooling of the fusible ribbon. The weak spot comprises a series of apertures ar... | 04/16/1985 |
| 4510559 | Lamp and filter mounting assembly A lamp and filter mounting assembly includes a lamp holder with a lamp mounting plate and a back wall for pivotal mounting to a bracket. The back wall of the lamp holder includes an inclined adjustment stop that engages the bracket upon rotation of the la... | 04/09/1985 |
| 4486005 | Side rod tensioning device for preventing misalignment and distortion during assembly of the plunger drive mechanism in a reciprocating pump A tensioning device for prestressing the rod members and transverse members connected thereto and operatively associated therewith has a jack assembly connected between at least two rod members and disposed to engage the transverse member, the jack assemb... | 12/04/1984 |
| 4467266 | Battery overcharge protection system A battery charging system having a charger control circuit which monitors one cell of a battery bank and controls the operation of a charging current source in accordance with the terminal voltage of the monitored cell. The charger control circuit include... | 08/21/1984 |
| 4419619 | Microprocessor controlled voltage regulating transformer A voltage regulating transformer utilizing a microprocessor and a versatile multipurpose set of hardware modules and software modules it is described. A standard tap changing mechanism is driven in response to an analog control signal to change the output... | 12/06/1983 |
| 4402134 | Method of making an integrated display device A high vacuum fluorescent display device contains solid state drive circuitry within a unitary evacuated container.... | 09/06/1983 |
| 4391847 | Coating for halogen lamps The invention relates to a composition for an opaque coating for minimizing the light output from selected areas of an incandescent lamp, particularly a halogen lamp. It has been discovered that a paste comprising a mixture of sodium silicate and manganes... | 07/05/1983 |
| 4385257 | Lamp base The invention relates to a base for a cartridge lamp of the type having at least one filament mounted on filament support legs extending through a seal of the bulb. According to the invention, a plug member has terminals affixed thereto for mounting the f... | 05/24/1983 |
| 4378104 | Fluid-pressure-loaded seal for butterfly valves This disclosure relates to the construction of butterfly valves of the type used for controlling fluid flow and, more particularly, to a seal for use in sealing the periphery of the closure member of such valves. Further, the seal disclosed herein is load... | 03/29/1983 |
| 4367433 | Self ballasted lamp for automotive, aircraft runway, etc. lighting A tungsten filament lamp incorporates arc discharge electrodes for an arc discharge in a gas fill enclosed in the lamp envelope. The tungsten filament is utilized as a ballast resistance for the arc discharge. A method for mounting the filament and electr... | 01/04/1983 |
| 4363085 | Scan synthesized beam headlamp A vehicle headlamp is provided wherein one or more reflectors scan a collimated beam of light to generate a desired light beam pattern and project it to the road. Electrical and mechanical driver means are also provided to change the mode of operation of ... | 12/07/1982 |
| 4360861 | Baseless lamp socket The invention relates to a socket for a baseless cartridge lamp, particularly a two-filament cartridge lamp or a cartridge halogen lamp with contacts at opposite ends thereof.... | 11/23/1982 |
| 4356365 | Air operated DC switch An air-operated switching device includes first and second spaced supports on which an armature is mounted. The armature includes a resilient blade fixedly mounted at a first end on the first support and for sliding movement with respect to the second sup... | 10/26/1982 |
| 4344111 | High efficiency lighting units and systems using same A lighting unit comprising a lamp and a reflector provides high intensity, high efficiency, even illumination over an area of particular shape and size and has a cut-off angle which enables a person to approach close to the lighting unit without seeing th... | 08/10/1982 |
| 4327401 | Rechargeable flashlight with integral variable rate battery charger for automotive use A rechargeable flashlight fits into and draws recharging power from an automotive type cigar lighter socket. A thermally controlled charging circuit within the flashlight adjusts the charging rate according to the ambient temperature. When the flashlight ... | 04/27/1982 |
| 4325734 | Method and apparatus for forming compact bodies from conductive and non-conductive powders Compact bodies for use as contacts in vacuum current interrupters, plasma devices and the like are formed by a vacuum hot press fabrication of suitable powder material. The contacts which may be formed as a button or ring, are operable under high current ... | 04/20/1982 |
| 4320377 | Arc gas control device for a power class fuse having load break contacts A power class fuse comprises an insulative canister having a female load break contact at a closed end of the canister and a male load break contact, coupled electrically to a fuse element. The male load break contact is inserted into the canister for eng... | 03/16/1982 |
| 4314223 | Thermal protective device for lighting fixtures A thermal protective device for interrupting current to the lamp circuit of an electrical lighting fixture when the temperature at a preselected location in the fixture reaches a predetermined level, comprises a receptacle including a pair of female termi... | 02/02/1982 |
| 4312667 | Method of forming large, minimal grain copper billet A recrystallized copper billet in excess of one and one-half inches in diameter is formed as an essentially single-grain or crystal copper. A high conductivity, oxygen-free copper billet is subjected to mechanical surface cleaning and to a "bright dip" ba... | 01/26/1982 |
| 4302798 | Pan for ceiling mounted light fixture A pan for a ceiling mounted light fixture includes a saucer-like canopy defining a mounting hole for receipt of a fastener to secure the light fixture to a ceiling support surface. A first layer of insulative material is received between the canopy and th... | 11/24/1981 |
| 4293895 | Mounting arrangement for recessed light fixture housing An arrangement for the recessed mounting of an enclosed light fixture housing having an open end with a flange formed about the periphery thereof in an aperture defined in a planar member, such as a ceiling, includes a slotted aperture defined in the side... | 10/06/1981 |
