Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 4607275 | Semiconductor element with disk-shaped housing A disk-shaped housing for a semiconductor element comprising a cup (1) of insulating material with an opening (2) at the bottom. Through this opening (2) passes a contact surface (4) of one of two plate type connecting bodies (3), between which lies a pre... | 08/19/1986 |
| 4599484 | Box for electrical components Boxes for electrical components are provided with elongate grooves (3, 26) to receive self-tapping or thread cutting screws for securing the components in the box. The grooves may extend above or below the bottom of the box.... | 07/08/1986 |
| 4591657 | Tamper-proof equipment securing housing A housing for securing equipment such as TV cable connection equipment in a substantial tamper-proof manner. The housing includes a bottom member having a base with sides extending upwardly therefrom. A cover corresponding in size with the bottom extends ... | 05/27/1986 |
| 4559699 | Method of constructing a padmounted distribution transformer A method of constructing a top-loaded padmounted distribution transformer in which closing of the transformer tank by welding on a top cover is one of the final manufacturing operations. Weld damage to the painted surfaces, which occurs when the cover is ... | 12/24/1985 |
| 4560827 | Electric fencer utilizing a sealed plastic housing The electric fencer includes two plastic components having an interfitting groove and rib, as well as integral pins on one component which are pressed into recesses in the other component. The two components are sonically welded together to form a complet... | 12/24/1985 |
| 4556758 | Padmounted transformer A padmounted transformer having an improved terminal cover-to-tank interface, which improves tamper resistance, improves corrosion resistance, and reduces manufacturing costs. The interface is formed by two equal, opposite facing acute angles in the cover... | 12/03/1985 |
| 4533786 | Padmounted transformer enclosure A padmounted transformer enclosure including a tank, terminal cover and sill which cooperatively define a composite structure having no pointed upper corners. The tank-terminal cover interface, and the terminal cover-sill interface, are both square, requi... | 08/06/1985 |
| 4530949 | Housing for electrical or electronic equipment A housing for electrical or electronic equipment is made by moulding under heat a composition comprising an organic thermosetting resin which includes exfoliated graphite in an amount which is enough to impart to the moulded article an electrical resistiv... | 07/23/1985 |
| 4486621 | Housing for a coaxial directional coupler A housing for a coaxial directional coupler has a channel-section body (20), each of the flanges of said channel-section body having two openings (2) with the opening in each flange being opposite to the corresponding opening in the other flange. A cover ... | 12/04/1984 |
| 4467136 | Drainable enclosure for explosion-proof electrical systems A hazardous location sealing fitting is provided with a multipart assembly so that the fill and drain opening may be maintained in a vertical orientation irrespective of the conduit orientation. The main body member comprises a "T" with a service port thr... | 08/21/1984 |
| 4420651 | Proximity switch operable without physical contact A proximity switch, operable without physical contact and having an elongated columnar housing which has, perpendicular to its principal axis, a cross-sectional shape with two orthogonal axes of symmetry. The housing is divided into at least two parts and... | 12/13/1983 |
| 4403277 | Industrial lighting illumination An industrial lighting luminaire including a ballast housing, a reflector and a reflector support securing the reflector to the ballast housing. The transformer forms a portion of the outer surface of the ballast housing which is adapted to accommodate tr... | 09/06/1983 |
| 4371593 | Pressure energized portable power source, and apparatus incorporating same This invention is directed to a combined battery holder means and pressure-switch plate formed from a unitary piece of electrically non-conductive, thin, flexibly resilient flat sheet material such as, but not limited, to plastic-coated carstock of betwee... | 02/01/1983 |
| 4365108 | Secondary power pedestal for electrical equipment A tubular housing and cover therefor, forming a secondary power pedestal, have a tapered construction and are arranged to nest together in shipment, storage and handling. The lower end of the housing is open and has substantially straight walls at its low... | 12/21/1982 |
| 4339629 | Junction box for housing cable connections In an improved junction box for housing cable connections or the like including in combination a receptacle adapted to house cable connections or the like and having an opening thereinto; a closure lid for releasably closing said opening, said closure lid... | 07/13/1982 |
| 4322702 | Electromagnetic relay A housing for an electromagnetic relay is disclosed which has the shape of a trough and is closeable by means of a flat cover. For fastening the cover on the housing, two holding lugs are shaped on the housing. The mounting of the cover proceeds by means ... | 03/30/1982 |
| 4313025 | Unitary die-cast assembly for electronic circuits A unitary die-cast for housing electronic circuits includes one or more compartments or cavities adapted to receive a circuit boards therein. A compartment with a cavity includes a post centrally located in the bottom and extending upwardly in the middle ... | 01/26/1982 |
| 4311996 | Hand held type electronic calculators In a hand held type electronic calculator wherein a display section and a key board are mounted on the surface of an insulative substrate, a driving circuit for driving the display section and an operation circuit operated by the key board are also mounte... | 01/19/1982 |
| 4291817 | Weatherproof panel enclosure The panel enclosure is used to house electrical equipment and not only shields the equipment from stray RF fields but also protects the equipment against water, moisture and the like. The enclosure is in the form of a shallow rectangular box having an ope... | 09/29/1981 |
| 4270833 | Reinforced electrical connector junction means A reinforced electrical connector junction means for flat conductor cable lying along a floor. The electrical connector junction means includes a base having a substantially flat support surface for mounting of the base on the floor adjacent a flat conduc... | 06/02/1981 |
| 4246436 | Junction enclosure assembly A junction enclosure assembly including an enclosure having a pair of vertically spaced rails mounted upon the inner surface of the back panel thereof in forwardly spaced relation and a junction mounting panel having a mounting bracket at each of its uppe... | 01/20/1981 |
| 4216349 | Fill control for sealing chamber in drainable enclosure for explosion-proof electrical system An electrical fitting for use in a conduit run which includes a sealing chamber into which a compound is placed to prevent the passage of gasses, vapors, or flames from one end of the fitting to the other. The fitting includes a drainage port to prevent t... | 08/05/1980 |
| 4213018 | Explosion-proof contact assembly and method of forming the same A method of making an explosion proof contact assembly and the resulting contact assembly are described wherein the electrical contacts are first rigidly mounted on a contact unit or subassembly prior to the molding operation. This approach allows complet... | 07/15/1980 |
| 4190732 | Electrical apparatus Fluid-filled electrical apparatus suitable for use in harsh environments. The electrical apparatus includes a tank having bottom and side members whose configuration provides corrosion protection for the electrical apparatus. A plurality of radially space... | 02/26/1980 |
| 4172212 | Submarine housing for submarine cable system repeater components or the like A device for use in submarine cable systems, particularly for fiber optic cable systems. A water-tight enclosure or housing is provided which is accessible for maintenance purposes. The device, which is of generally tubular shape, provides termination cha... | 10/23/1979 |
| 4158102 | Enclosure for equipment A lightweight tubular housing open at both ends is specially constructed so as to be buried in the earth to almost its full height and yet withstand thrust forces of fill material. For this purpose the housing has outwardly curved side walls, it is tapere... | 06/12/1979 |
| 4156998 | Equipment shelter An equipment shelter is disclosed for housing delicate apparatus such as electronic equipment, and which reliably protects the same not only against physical damage, but also against corrosive or thermal damage as might result from excessive exposure to t... | 06/05/1979 |
| 4142179 | Safety warning lamps for adverse or hazardous atmospheres A warning lamp for use in hazardous atmospheres including three air-filled volumes interconnected by a passageway between screw threads whereby, in the event of an explosion, each of the volumes stores a quantity of explosive gases prior to permitting esc... | 02/27/1979 |
| 4120545 | Housing for an electrical or electronic apparatus A housing for a self-supporting interior structure of electrical or electronic apparatus has a front panel and a casing formed of two U-shaped casing members detachably connected with one another via side spacing members. The side spacing members are form... | 10/17/1978 |
| 4113291 | Security locking system A combination door handle and security locking system in which the conventional door latch is actuated by turning the five-sided head of an operating shaft with a special socket wrench. A hinge plate having a slot for a padlock bail and a flat index tab o... | 09/12/1978 |
| 4112248 | Terminal box for a lifting magnet A terminal box for a lifting magnet has a bottom mounting surface to be secured to the casing of the lifting magnet over a pair of apertures in the casing through which the coil conductor leads pass. An arcuate protective shield of the box extends upwardl... | 09/05/1978 |
| 4051414 | Missile adaptation kit assembly A high density component assembly package for a missile including a pluray of circular bulkheads axially supported by rigid spacing members to form a cylindrical adaption kit. Electronic components are mounted on and/or between the bulkheads with the ele... | 09/27/1977 |
| 3983311 | Auxiliary gutter with lay-in end walls and universal cover An auxiliary gutter to receive, secure and house cable for connecting to an adjacent load center. The end walls of the gutter have a recessed edge region or notch intermediately thereof with cooperating clamp means to lay-in and secure lengths of cable wi... | 09/28/1976 |
| 3974933 | Explosion proof and watertight enclosure with inspectable means for verifying validity of reclosure When electrical equipment is used in a hazardous atmosphere, it must be enclosed in an explosion proof enclosure so an electrical spark cannot cause a fire or explosion. The present invention provides a means for assuring that an explosion proof enclosure... | 08/17/1976 |
| 3950603 | Enclosure case for potless immobilization of circuit components An enclosed modular circuit component is immobilized against deleterious movement due to high impact, shock and vibration movement. A two-piece enclosure case for securely immobilizing a wide variety of readily available modular circuit components is easy... | 04/13/1976 |
| 3944718 | Enclosure for pad mounted equipment An enclosure including a housing open at the bottom and arranged to conceal pad mounted equipment such as electrical equipment. The housing has one or more doors for access to the interior and includes at least one lateral rib in its walls for reinforceme... | 03/16/1976 |
| 3943272 | Dual preset service fitting or insert for underfloor wireway systems The fitting is mountable on a cellular steel floor or deck prior to pouring of the concrete of a completed floor and comprises a separable flat base plate, a box-like housing, and a cover plate. Two self-grommeted openings in the base plate are axially al... | 03/09/1976 |
