"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 4826455 | Terminal contact assembly A terminal contact assembly comprising a dielectric sleeve of flexible material having a midportion provided with a transverse integral partition wherein a keyway slot extends from an open end thereof communicating with a longitudinal slot in a defining w... | 05/02/1989 |
| 4826439 | Self-latching lamp jack A self-latching lamp jack comprising first and second dielectric plates disposed in opposing relationship for forming respective opposing sides of the lamp jack. One of the opposing plates is provided with a plurality of interposed wall portions for formi... | 05/02/1989 |
| 4820200 | Slab-like jack module A jack module having a relatively thin substantially rectangular dielectric housing having collared plug receiving apertures on one end thereof. The housing has a mounting bar parallel with said end, and the mounting bar has a plurality of slots perpendic... | 04/11/1989 |
| 4737843 | Color image display system for producing and combining four color component images each inverted in at least one aspect relative to the other images An image display system comprising a cathode ray type of tube having an electron gun disposed for directing an electron beam onto an output phosphor screen provided with quadrant portions extending from a common point and made of respective different phos... | 04/12/1988 |
| 4632710 | Vapor phase epitaxial growth of carbon doped layers of Group III-V materials An epitaxially grown high resistivity crystalline layer of gallium arsenide is produced in a reactor vessel with a predetermined amount of carbon dioxide introduced during growth of the high resistivity gallium arsenide (GaAs) crystalline layer to provide... | 12/30/1986 |
| 4593383 | Integated circuit memory An integrated circuit memory is disclosed having a power switch circuit which, in response to an enable signal, initially addresses a plurality of rows of memory elements during an initial pre-enable condition and which subsequently places the memory in t... | 06/03/1986 |
| 4435628 | Seed heating microwave appliance An appliance for heating seeds, nuts, grains and the like such as popcorn kernels, for example, by means of microwave radiation, comprising a bowl which is transparent to microwave energy and which has in its lower region an area of restricted size for ho... | 03/06/1984 |
| 4180712 | Slide switch An improved electrical slide switch having a housing portion, a slidable actuator within the housing, and a resiliently engageable and removable cap which may itself be the actuator, the actuator having a pair of precisely spaced integral leaflike element... | 12/25/1979 |
| 4168838 | Bulkhead fitting A bulkhead fitting for use with plastic material for conducting fluid through an aperture in the material and comprising coupling components on either side of the material which interfaces with the plastic material by an abrasive element pressed against t... | 09/25/1979 |
| 4166208 | Corn popper with butter dispenser A microwave corn popper having means for dispensing butter during or shortly subsequent to the corn popping process, and comprising a chamber containing the corn kernels to be popped and having a cover with a recess in which is disposed a butter container... | 08/28/1979 |
| 4166231 | Transverse beam X-ray tube An X-ray generator which produces a beam of parallel substantially non-spreading radiation, the generator including a housing containing a tube having an envelope containing an X-ray generating target and an X-ray transmissive window, the target having a ... | 08/28/1979 |
| 4158464 | Utensil handle for use in microwaves A handle for a small appliance, utensil or other body such as a coffee maker, for example, and particularly designed to be used in a microwave environment, the handle being made entirely of material which will remain cool when subjected to microwave radia... | 06/19/1979 |
| 4158760 | Seed heating microwave appliance An appliance for heating seeds, nuts, grains and the like such as popcorn kernels, for example, by means of microwave radiation, comprising a bowl which is transparent to microwave energy and which has in its lower region an area of restricted size for ho... | 06/19/1979 |
| 4156806 | Concentrated energy microwave appliance An appliance for heating seeds, nuts, grains and the like such as popcorn kernels, for example, by means of microwave radiation, comprising a bowl which is transparent to microwave energy and which has in its lower region an area of restricted size for ho... | 05/29/1979 |
| 4150657 | Solar collector A solar collector which includes a radiation-absorbing panel having a surface provided with integral fluid-conducting conduits whereby heat absorbed by the panel may be efficiently transferred directly to fluid circulating in the conduits.... | 04/24/1979 |
| 4132239 | Fluid valve for microwave devices A fluid valve for utilization in a beverage-making appliance such as a coffee maker subject to microwave energy comprising a valve housing containing the operative parts of the valve, and a metal casing enclosing at least a portion of the housing and havi... | 01/02/1979 |
| 4127477 | High capacity materials separation apparatus A high capacity materials separation apparatus including a conductive metals segregator in the form of a magnetic ramp for receiving commingled materials from an air classifier, the air classifier comprising means for separating materials into heavy and l... | 11/28/1978 |
| 4122830 | Solar heating system A system utilizing solar energy collectors for heating water, which system embodies a piping circuit whereby water from a storage or supply tank is pumped in a continual upward path through the collectors to a peak elevation and thence through sized retur... | 10/31/1978 |
| 4104957 | Microwave coffee maker A coffee brewing appliance for making coffee by the drip method and comprising a reservoir containing a thermally controlled valve adapted to open at a predetermined temperature when heated by water in the reservoir which is subjected to microwave radiati... | 08/08/1978 |
| 4103198 | Rotating anode x-ray tube An x-ray tube including an evacuated envelope having therein a rotatable anode target comprised of a cup-shaped body having a sloped inner wall provided with an annular groove wherein a plurality of pinlike members form an x-ray generating focal track, th... | 07/25/1978 |
| 4075042 | Samarium-cobalt magnet with grain growth inhibited SmCo5 crystals Permanent magnets formed from rare earth cobalt compounds have high energy products. One rare earth cobalt composition, formulated by metallurgical sintering techniques, is a composition of a rare earth and cobalt such as samarium and cobalt containing ab... | 02/21/1978 |
| 4064866 | Flat plate solar heat collector A solar collector which comprises a panel including flat collector plates or absorbers interconnected by integral interfitting members which simultaneously support fluid-conducting tubing and retain the tubing in efficient heat-conductive relation with th... | 12/27/1977 |
| 4063545 | Solar collector thermostat A solar energy collector having therein a solar energy-absorbing panel in thermally-conductive relation to fluid conduits through which fluid is urged by an electrically controlled pump, and a thermostat associated with the collector and arranged to detec... | 12/20/1977 |
| 4063544 | Solar energy collectors A solar energy collector which includes an enclosure within which is located a solar energy-absorbing panel disposed in spaced relation with an overlying glazing, the enclosure being a single sheet of metal fabricated with integral side and end walls, spa... | 12/20/1977 |
| 4046679 | Magnetic drum materials separator Materials separating apparatus comprising an inclined drum rotatable about its longitudinal axis and having an inner surface comprised of an array of permanent magnets arranged in parallel strips extending circumferentially at an angle to the drum axis, a... | 09/06/1977 |
| 4043317 | Vented solar collector A solar collector of the type embodying a collector plate with fluid conduits disposed in heat-conductive relation to the plate, and a transparent cover spaced above the plate-conduit assembly, with venting devices being provided in opposite end portions ... | 08/23/1977 |
| 4033322 | Oven door structure A windowed door structure for an oven such as used for household baking and broiling functions, for example, which door structure assumes relatively low exterior surface temperatures during operation of the oven by virtue of the fact that the window overl... | 07/05/1977 |
| 4029573 | Waste segregating apparatus Waste segregating apparatus for separating selected nonferromagnetic conductive metals from other nonferromagnetic materials in a commingled supply thereof, comprising means for forming a moving supply of shredded nonferromagnetic materials into a plurali... | 06/14/1977 |
| 4029572 | Air drum with drying means A rotary drum air classifier apparatus for separating light and heavy materials introduced into the drum by conveyor means, means for producing a flow of air at relatively high velocity through the drum for entraining light materials, heating means encirc... | 06/14/1977 |
| 4023005 | Laser welding high reflectivity metals A method of welding high reflectivity materials by laser radiation comprising cladding material in the area to be welded with a low reflectivity material and subsequently directing a coherent beam of laser radiation, pulsed or continuous, onto the clad ma... | 05/10/1977 |
| 4016071 | Magnetic separation apparatus Apparatus for separating magnetic materials from nonmagnetic materials in a supply of mixed waste material, comprising an inclined rotary drum having loading means for introducing a continuous flow of mixed waste materials into the drum, means for simulta... | 04/05/1977 |
| 4005322 | Rotating anode target structure A rotating anode target for X-ray tubes comprising a substrate disc provided with an annular marginal portion having opposed bevel surfaces convergent toward an outer peripheral edge of the disc, one of the surfaces being coated with a layer of X-ray emis... | 01/25/1977 |
| 4002559 | Screw conveyor with dewatering means A screw conveyor for moving water-laden materials from one location to another comprising a feeder screw extending longitudinally within an enclosing duct or housing and a dewatering cylinder closely encircling the screw and comprised of closely spaced el... | 01/11/1977 |
| 3970547 | Air classification apparatus A rotary drum air classifier system which includes a side feed hopper by which mixed materials to be separated are fed to a screw feed which deposits the materials inside the drum for major separation into light and heavy materials, the screw feed being l... | 07/20/1976 |
| 3958936 | Plastics sterilizer and melter having an afterburner An appliance for sterilizing and melting plastic items such as found in hospitals or the like, for example, which appliance includes a chamber containing a foil casing within which the items are placed, and means for heating the chamber for a temperature ... | 05/25/1976 |
| 3957629 | Adjustable air classifier drum and conveyor An air classifier drum for receiving mixed materials and separating them into light and heavy materials, the heavy materials being dropped from one end of the drum during operation onto a conveyor, the drum being rotatable about an axis disposed at a sele... | 05/18/1976 |
| 3957421 | Heat injector gas burner A heat injector gas burner having controlled air flow for assuring positive repetitive ignitions, comprising an elongated tubular casing having therein a short tubular flame holder into which gas is introduced, means at one end of the casing for metering ... | 05/18/1976 |
| 3957630 | Adjustable materials feeding apparatus A materials separating apparatus which comprises a conveyor on which materials to be separated are deposited and conveyed to a hopper mounted on an adjustable platform, a rotary drum air classifier mounted on said platform, and transport mechanism connect... | 05/18/1976 |
| 3951335 | Oven stack action control An oven having an air inlet opening in its lower region and an exhaust opening in its upper region, and at least one gas-fueled burner within the oven, one of the openings containing a baffle variably movable into and out of closing relation to the openin... | 04/20/1976 |
| 3949685 | Automatic vacuum system An automatic suction-type cleaning system for apparatus such as a household incinerator, which system comprises a number of air jets spaced at selected intervals along two walls of a compartment being cleaned and directed toward a single common outlet in ... | 04/13/1976 |