Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4480152 | Methods and apparatus for protecting line relay contacts in a telephone switching system Line relay contacts (LR11, LR12) are protected from power surges appearing on a telephone line (L1) during connect or disconnect of a station set (S1) from the line, by operating a hold relay (HR1) to place a hold bridge (HB1) across... | 10/30/1984 |
| 4447109 | Connector pin An electrical connector pin is formed from a unitary piece of strip so as to be in the shape of an elongated tubular member with terminal and contact sections at opposite ends, and with an unbonded seam extending between those sections. The terminal secti... | 05/08/1984 |
| 4445360 | Method for ultrasonically determining characteristics of a body An ultrasonic technique for remotely inspecting a body is described. A transducer (14), capable of generating and detecting ultrasonic signals, is coupled to the body. An ultrasonic signal (Ao) is launched by the transducer (14) into the body (... | 05/01/1984 |
| 4444848 | Adherent metal coatings on rubber-modified epoxy resin surfaces A method of forming adherent metallized coatings on a substrate which is useful for the manufacture of printed circuit boards as well as other metal coated articles involves providing the substrate with a rubber-modified epoxy surface or coating, sputter ... | 04/24/1984 |
| 4443305 | Emulsion electrowinning A process of electrodepositing a metal from an organic phase containing a salt or complex of that metal includes the steps of creating a dispersion of the organic phase in a conducting aqueous electrolyte with which it is immiscible and electrodepositing ... | 04/17/1984 |
| 4441124 | Technique for inspecting semiconductor wafers for particulate contamination A laser beam (88) is raster scanned over the surface of a patterned semiconductor wafer (66) at an angle normal thereto. A plurality of detectors, radially spaced from the wafer (66) and substantially coplanar therewith detect light scattered from contami... | 04/03/1984 |
| 4439918 | Methods of packaging an electronic device An electronic device assembly (11) includes a heat dissipating substrate (18) having a seat (16). A device (14) is uniformly spaced from a base surface of the seat (16), and a layer of solder of uniform thickness occupies a gap between the surface of the ... | 04/03/1984 |
| 4441183 | Apparatus for testing digital and analog circuits A high-speed, high-resolution testing circuit for both analog and digital circuit packs is described. The testing circuit, which employs data compression techniques, comprises a shift register (22) having an overall length selectively variable under progr... | 04/03/1984 |
| 4439467 | Methods of coating lightguide fiber and product produced thereby A coating material is applied to drawn lightguide fiber in a manner which substantially prevents the inclusion of bubbles and which causes the fiber to be disposed substantially concentrically within the coating layer. The lightguide fiber is advanced thr... | 03/27/1984 |
| 4439632 | Bonded sheath cable A cable which is capable of being made in a large pair size and yet which has excellent mechanical properties that maintain its integrity notwithstanding extremes in temperature during installation and shipping as well as during the rigors of installation... | 03/27/1984 |
| 4437605 | Methods of and apparatus for pumping solder The formation of dross in a molten solder bath (28) by surface agitation of the bath, and the adverse effects of dross on a solder pumping operation, are essentially eliminated by suspending a pump shaft (36) and an impeller (38) thereon for free rotation... | 03/20/1984 |
| 4437362 | Tools for handling magnetic articles A tool (10) for handling a magnetic article (50) includes a member (12) having a jaw (18) which is movable toward and away from a member (14) having a corresponding jaw (14). A holder (34) is associated with jaw (20) of member (14) for releasably holding ... | 03/20/1984 |
| 4437229 | Methods of marking and electrically identifying an article A hybrid integrated circuit package (11) typically includes a circuit substrate or article (12) on which are formed thin film components (17, 18, 19) of a circuit (22) and to which is bonded at least one semiconductor chip (21). Prior to bonding the chip ... | 03/20/1984 |
| 4436958 | System using the telephone network to control locks at a number of remote locations A number of remotely located locked devices (26 and 27) are selectively operated by sending signals from a central supervisory location (28) through the telephone network (27) to a telephone set 32 and a converter (44) installed at each remote location. I... | 03/13/1984 |
| 4437148 | Peak voltage clamped power supply The cost and energy efficiency of a power supply are optimized in a semi-regulated circuit wherein regulation occurs only under a high voltage, low current condition when peak output voltage would otherwise exceed a maximum specified voltage. The circuit ... | 03/13/1984 |
| 4436474 | Selecting articles from an array thereof An assembly is provided for selecting at least one vertically oriented planate article such as a disc-shaped wafer (10) from an array of such wafers. A carrier (20) holds the wafers (10) in a mutually spaced, substantially parallel relationship along a si... | 03/13/1984 |
| 4435199 | Exhaust system for a vapor deposition chamber An exhaust system (3) for a vapor-phase axial deposition (VAD) system (5) is comprised of the serial combination of an exhaust tube (26), an outlet pipe (27), a soot collection chamber (32) and a discharge line (34). The exhaust tube (26) has a constricte... | 03/06/1984 |
| 4435258 | Method and apparatus for the recovery of palladium from spent electroless catalytic baths A method is described for recovering palladium from spent catalytic colloidal palladium baths by dissolving the palladium to form a true solution followed by electrodeposition employing a nickel anode and a nickel or copper cathode.... | 03/06/1984 |
| 4433970 | Method of heating a lightguide preform This disclosure is directed to an oxy-hydrogen torch (10) comprised of a nozzle plate (16) captured between first and second outer members (12 and 14). Each outer member has a plenum (18) which open towards, and is separated by, the plate (16). The nozzle... | 02/28/1984 |
| 4434012 | Treating articles in an array with streams of a medium Articles such as substantially flat, electronic chips (10) are positioned in an array with surfaces (11) to be treated facing upward along a succession of specially selected tiers. Such tiers may preferably be horizontal rows (20-24) of top rims (19) of v... | 02/28/1984 |
| 4432663 | Cable pulling eye A cable pulling eye assembly comprises a spike (16) having an auger thread (18), a coaxially mounted shell (36) and an eye (31) with a threaded opening (34), which is mounted on a threaded rear section of the spike. The eye is rotated by a power tool to a... | 02/21/1984 |
| 4431474 | Thermocompression bonding apparatus A thermocompression bonding apparatus (10), which is particularly adapted to bond an array of miniaturized electrical leads (36) to a corresponding array of respectively aligned pads (33) of a metallized circuit, supported on a substrate (31), includes a ... | 02/14/1984 |
| 4429454 | Connector terminal spreader A connector (13) having two banks of terminals (16 and 17) is seated in a nest (27) located in a terminal spreading apparatus. A first spreader (36-37) overlies the first bank of terminals (17). A printed circuit board (10) with edge contact pads (12) is ... | 02/07/1984 |
| 4430385 | Compositely insulated conductor having a layer of irradiation cross-linked polymeric plastic material An elongated metallic conductor is insulated with an inner layer of a plasticized polyvinyl chloride composition and an outer layer of a plasticized, irradiation cross-linked polyvinyl chloride composition. The outer layer has a low coefficient of frictio... | 02/07/1984 |
| 4429298 | Methods of trimming film resistors A bar-type film resistor (40) is adjusted to a high degree of precision by longitudinally offset plunge cuts (41, 42 and 43) extending from alternately opposite edges (29, 49) into the resistive layer (13), by a trim cut (46) which extends from the most r... | 01/31/1984 |
| 4429271 | Digital capacitance measuring test set and test circuit incorporated therein A high speed capacitance test set (10 or 60), comprised of a digital test circuit portion (11 or 11') and a multi-pulse train generating portion (12 or 12'), is adapted to make exceedingly rapid, repetitive capacitance measurements, such as required when ... | 01/31/1984 |
| 4428773 | Process for treating spent fluids to recover copper and copper oxide A process for recovering copper and copper oxide for spent ammoniacal etchant, electroless and copper persulfate bath fluids used in the manufacture of copper printed wiring boards such that the treated baths contain no ammonia. The spent solutions are pl... | 01/31/1984 |
| 4428762 | Vapor-phase axial deposition system A vapor-phase axial deposition system (5) for fabricating a lightguide soot boule (16). The system (5) is comprised of a short cylindrical housing (10) having end plates (26--26) affixed thereto. A starting member (58) is radially directed into the centra... | 01/31/1984 |
| 4428815 | Vacuum-type article holder and methods of supportively retaining articles A vacuum-type holder (10) for retaining fragile articles such as semiconductor wafers (16) during a manufacturing operation, such as an electrolytic treatment includes a vacuum-operated support (36) at each of the seats (23) which exerts a supporting forc... | 01/31/1984 |
| 4427469 | Methods of and apparatus for controlling plastic-to-conductor adhesion of plastic-insulated, tinned conductors A tinned conductor is advanced through each of a plurality of successively smaller die openings in a drawing apparatus to reduce the diameter of the tinned conductor after which it is annealed. After the tinned conductor has been annealed, it is moved thr... | 01/24/1984 |
| 4425708 | Relay cutting tool A power operated tool (20) functions to cut and collect a multitude of precious metal contacts (11,11) from wire spring relays (10). The tool (20) includes a pair of jaws (31,32) that in the open position fit over several rows of contacts (11,11). When th... | 01/17/1984 |
| 4425775 | Methods for extrusion Two elongated gripping members (12,12) cooperate to form a closed pressure chamber about a waxed billet (61). The gripping members are reciprocated relative to an extrusion station (13), such reciprocation first moving the pressure chamber toward and past... | 01/17/1984 |
| 4426255 | Wire insulating method and apparatus Apparatus and method for insulating wires with pulp are disclosed wherein wires embedded in pulp ribbons supported upon an endless transfer belt are passed through radio-frequency electromagnetic fields generated by oscillators tuned to resonate at a high... | 01/17/1984 |
| 4425474 | Pulp-insulated conductor cable A cable of this invention includes a number of pulp-insulated conductor pairs per unit of cable cross-sectional area which is substantially greater than in prior art cables. Each pulp-insulated conductor includes a metallic conductor enclosed in a composi... | 01/10/1984 |
| 4425074 | Methods of and apparatus for transferring articles Articles (18) are transferred from a first position, such as a feed track (37) on which they are located closely spaced, to a second position such as a heat seal apparatus. At the heat seal apparatus the spacing of the articles is to coincide with the spa... | 01/10/1984 |
| 4424899 | Instrument carrying case The invention is for an instrument carrying case comprising an open-topped box, a lid having a substantially planar panel for covering the top of the box, and a flexible hinge joining the rear edge of the lid to the top edge of the rear wall of the box su... | 01/10/1984 |
| 4424617 | Method and apparatus for boxing and encapsulating electrical devices Plate-like carriers (51) having box-receiving slots (54) formed along one edge and rack teeth (58) formed along an opposite edge are fed from a stack (52) and along a trackway (53) where a pair of cog devices (59 and 61) are cyclically operated on fast an... | 01/10/1984 |
| 4425292 | Hybrid extrusion methods A hybrid extruder provides plastic insulation which is as uniformly and tightly disposed about a substrate as that produced in a conventional pressure extruder and accommodates irregular substrates. The hybrid extruder includes a core tube which is positi... | 01/10/1984 |
| 4425482 | Ring armature electroacoustic transducer The disclosure relates to a ring armature electroacoustic transducer adapted for use as the receiver for telephone sets and for other purposes. The exemplary embodiment comprises the following elements coaxial about a common vertical axis: (a) a cylindric... | 01/10/1984 |
| 4423589 | Telecommunication cables and methods of manufacturing same A multi-unit telecommunication cable is disclosed in which the twisted wire pairs of the unit are presented adjacent the conductive cable sheath at irregularly spaced locations. The cable may be made by modulating the amplitude and/or frequency of the osc... | 01/03/1984 |
