Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 5218575 | Acoustic transducer A flexural mode acoustic transducer system for use in pulse-echo ranging systems has a radiating plate of which even-numbered antinodal zones, counting from a drive connection to a driving element at the center of the plate, are formed with rings of apert... | 06/08/1993 |
| 5202290 | Process for manufacture of quantum dot and quantum wire semiconductors Quantum dot and quantum wire semiconductors in the nanosize range are produced by a process which utilizes a microporous aluminum oxide surface layer on an aluminum metal substrate as a template for the semiconducting material. The microporous surface lay... | 04/13/1993 |
| 5199526 | Lightweight high performance road racing vehicle A small and ultralightweight vehicle, especially for automobile racing, is provided having a driver's cockpit laterally offset from the vehicle's longitudinal axis; an engine laterally oppositely offset from the vehicle's longitudinal axis, laterally adja... | 04/06/1993 |
| 5191998 | Brush housing for bulk vendor A coin operated bulk vending apparatus is provided with brushes, preferably tension springs, extending over the aperture above the dispensing wheel. One end of each brush is anchored to a brush housing adjacent a periphery of the dispensing wheel, and the... | 03/09/1993 |
| 5191183 | Apparatus for processing ceramics using microwave oven with resistance heating unit An apparatus for calcining and/or sintering ceramic materials comprising a kiln having a heating chamber formed from a microwave impermeable material separated from abutting secondary chambers containing conventional heating means by perforated walls, per... | 03/02/1993 |
| 5188017 | Natural gas cylinder fitting and solenoid valve A natural gas cylinder fitting and solenoid valve includes a solenoid-actuated poppet co-operating with an O-ring clamped to the floor of the valve cavity to selectively prevent or permit the passage of gas between a gas line and a natural gas cylinder. I... | 02/23/1993 |
| 5185261 | Twin-unit composting apparatus A composting apparatus is provided comprising two similar units arranged side-by-side each provided with a wire mesh basket structure as its lowermost extremity. The units are installed in a hole in the ground, with the wire baskets underneath and allowin... | 02/09/1993 |
| 5178902 | High performance composite coating Two methods are provided for applying and forming a protective composite coating on a metallic substrate. In the first method, the substrate is heated to a temperature between about 175° C. and 275° C. and a powdered coating of epoxy resin between 100 a... | 01/12/1993 |
| 5176290 | Coin operated vending machine An improvement in a coin operated vending machine for vending bulk articles comprises means for deflecting loose articles away from the entrance to the dispensing aperture. The means comprises a resilient rolling member, extending across an entry notch to... | 01/05/1993 |
| 5175032 | Heat shrinkable closure sheets and sleeve structures and methods employing the same A longitudinally heat shrinkable closure sheet has a hold-down adhesive portion adjacent each longitudinal end for application on the exposed end portions a heat shrinkable wrap-around sleeve applied around a pipe or other article to be covered. Heat is a... | 12/29/1992 |
| 5161797 | Outdoor billiards table An outdoor billiards table comprises supporting legs, a supporting frame, a playing surface and side and end rails formed from concrete. Main levellers are disposed between the supporting frame and the supporting legs to level the table, and slate levelle... | 11/10/1992 |
| 5154960 | Drapeable soft odor absorbing sheet material Odor absorbing sheet material is formed from a thin flexible substrate sheet on which discrete spaced areas, for example dots, of bonding agent such as latex adhesive are applied. Odor absorbing granules are bonded to the surface of each adhesive area. Si... | 10/13/1992 |
| 5155474 | Photographic security system An intrusion detection apparatus for detecting the presence of an intruder in a forbidden space comprises a sensor, an illumination system, a sound system and a still camera. When the sensor detects the presence of an intruder, it switches on the illumina... | 10/13/1992 |
| 5142798 | Downhill ski boot assembly A downhill ski boot assembly combines a flexible walking boot with a boot brace insertable into a standard ski binding to provide a skier with the control and feel of a conventional hard ski boot. The boot brace has a sole plate insertable into the ski bi... | 09/01/1992 |
| 5144416 | Video display and imaging devices having liquid crystal scanning A vacuum tube video display screen and imaging device utilizing waveguides to disperse a horizontal line of image over the vertical area of the viewing screen and an array of closely spaced liquid crystal lines to permit passage of light from the disperse... | 09/01/1992 |
| 5142730 | Liquid spill clean-up devices An apparatus for sucking up liquid spills of relatively small volumes is provided, comprising a container to which vacuum can be applied pneumatically, and a pick-up hose and wand. The apparatus is totally free from electrically operated components, so as... | 09/01/1992 |
| 5141074 | Lineman's pole strap assembly In a lineman's pole strap assembly for use on utility poles and the like, the assembly comprising an outer strap and a cross strap attached at its ends to the outer strap so as to define a closed loop encircling the pole, the cross strap is connected to t... | 08/25/1992 |
| 5137390 | Connection means for suspended ceiling grid A connector member for connection to a T-bar is in the form of a plate with a lug extending from one side. The T-bar has an aperture which snugly receives the lug when the plate is applied on the side of a web of the T-bar. The lug extends through the ape... | 08/11/1992 |
| 5136855 | Heat pump having an accumulator with refrigerant level sensor A ground source heat pump comprising an indoor coil circuit and an outdoor coil circuit utilizes a scroll compressor to pressurize the refrigerant. The outdoor coil may comprise ground coils formed from copper tubing into a spiral configuration. A charge ... | 08/11/1992 |
| 5135165 | Device for aligning and clamping a rail A rail clamping device is provided for aligning and clamping the flange of a rail to a support surface. A slotted clip is fitted over an anchor bolt or other suitable connector, a plate cam washer having an eccentric hole is placed upon the clip, and a nu... | 08/04/1992 |
| 5134000 | Heat shrinkable protective sheets and methods for their manufacture A heat shrinkable wrap-around sleeve comprises a heat shrinkable sheet with a heat stable strip welded on one end. The free end of the heat stable strip is overlapped on the outer side of the opposite end of the sheet and welded thereto by heating applied... | 07/28/1992 |
| 5130094 | Liquid-liquid contact apparatus having fire control capability A liquid-liquid contacting apparatus is provided having the capacity to control and contain a fire occurring within a separator vessel. Mixing of two liquid phases such as an organic and an aqueous solution may be advantageously conducted when the two pha... | 07/14/1992 |
| 5122781 | Hazard warning light A hazard warning device for use in place of a conventional flare has a lamp assembly using a long shelf life battery to over-run light emitting diodes under control of a low duty cycle low frequency oscillator. The lamp assembly is built into a lens at on... | 06/16/1992 |
| 5120558 | Process for the supercritical extraction and fractionation of spices A process for extracting spice to obtain oleoresin and fractionating the oleoresin into fixed and essential oil components is described. The extraction is performed on the ground spice using supercritical fluid carbon dioxide under a pressure of from abou... | 06/09/1992 |
| 5118951 | Radioluminescent light sources A radioluminescent source is provided by a radioactive element entrapped in an amorphous semiconductor. A preferred light source comprises a beta-emitting radioactive element, such as tritium, occluded within a matrix of amorphous semiconductor material, ... | 06/02/1992 |
| 5114105 | Electrical box support bracket An electrical box support bracket for adjustably supporting one or more electrical outlet boxes of the kind having parallel mounting flanges on the top and bottom sides. The bracket consists of a plate with a rectangular opening having channels at the top... | 05/19/1992 |
| 5115100 | Purification of hemoglobin and methemoglobin by bioselective elution A method for purifying hemoglobin, mixed with other proteins is described, wherein the mixture is contacted with an ion exchange matrix so that the hemoglobin is adsorbed to it. The matrix is washed to remove unadsorbed components, and the hemoglobin is t... | 05/19/1992 |
| 5115491 | Tempering system for storage tank water heaters utilizing inlet and outlet heat exchanger A fluid tampering system for use with a standard water heater storage tank includes a heat exchanger which interposed between the outlet means for conveying heated fluid from the storage tank to a distribution system and the cold fluid inlet means, so tha... | 05/19/1992 |
| 5105453 | Wood pole decay detector A manually operable device for detecting wood pole decay and a method of using the same are disclosed. A gamma ray emitter is provided with guide means enabling it to be piloted longitudinally along the wooden pole so that gamma rays from the emitter pass... | 04/14/1992 |
| 5104152 | Welded pipe joint A welded pipe joint for pipes which are internally lined for carrying corrosive fluids is formed by an internally lined insert extending into the belled end sections of the pipes to be joined and engaging the belled end sections with a mechanical interfer... | 04/14/1992 |
| 5102618 | Vapour phase catalytic exchange apparatus A reactor for use in the separation of tritium from tritiated water by the vapor phase catalytic exchange process comprises an evaporator section, a superheater section, a catalytic reactor section and a condenser section serially arranged within a common... | 04/07/1992 |
| 5102615 | Metal-clad container for radioactive material storage A container for storing and transporting radioactive material is provided comprising: a vessel, having an upwardly open cavity for accommodating radioactive material; and a cap covering the top surface of the vessel to seal the cavity. The vessel and cap ... | 04/07/1992 |
| 5090034 | Dual channel ionization counter An event counter has dual counting channels, each employing a ripple counter, and a timing generator supplying square wave switching signals of opposite phases to gates at the inputs of the two counters, the switching signals having a much greater periodi... | 02/18/1992 |
| 5086206 | Support arm A support arm for welding operations having outlets at the outer end of the arm providing access to compressed air, fume and dust extraction, and electrical power. All utility conduits such as electric welding power supply conductors, air hoses, extractio... | 02/04/1992 |
| 5082493 | Processing of carbon steel furnace dusts In a process for the hydrometallurgical treatment of electric arc furnace dusts which includes an acetic acid leach, the acetic acid solution used to perform the leach is made strong enough to dissolve heavy metal residues in the dusts, the iron-containin... | 01/21/1992 |
| 5083233 | Surge protection assembly for insulating flanges A protective device for an insulating flange of a high voltage transmission system comprises a varistor unit in combination with a spark gap. The varistor unit is clamped between a pair of radially extending stub plates connecting the unit in shunt with t... | 01/21/1992 |
| 5079751 | Acoustic ranging systems In an acoustic pulse-echo ranging system, the transmitter and receiver, which respectively generate pulses of acoustic energy and receive reflections of the same, are electronically tuned to determine their operating frequency, the electronic tuning being... | 01/07/1992 |
| 5076101 | Liquid level measurement system for tanks A system for sensing the level of contents in a container is disclosed. A tubular member is vertically disposed in the container and sealed from the contents of the container. A marker located in the tubular member and generating a peripheral polarized ma... | 12/31/1991 |
| 5070659 | Retractable roof for stadium structure A structure is provided having two opposing nested pairs of outwardly convex roof arches mounted for rotation about a generally horizontal axis. Each pair of nested roof arches can be rotated about its axis from a lowered nested condition to a raised cond... | 12/10/1991 |
| 5070792 | Multi-position travelling carriage with flexible track The invention relates to the use of a thin flexible track of spring steel having a series of perforations therethrough for use in conjunction with a variable speed travel carriage having a carriage drive sprocket which is studded about the periphery with ... | 12/10/1991 |
