Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 4920858 | Numerical control apparatus for a mechanical hydraulic servo valve A servo system includes a tubular drive shaft journalled in a housing. A screw is engaged threadably with a nut which is fixed in the drive shaft. A driven body is secured to an end of the screw so that the screw can effect a rectilinear movement with the... | 05/01/1990 |
| 4920859 | Radial piston pump and motor A hydraulic radial piston power transmitting assembly including a hoursing and a back plate with a fixed pintle attached to the back plate which rotatably supports a cylinder block with radially spaced bores and pistons therearound, a drive shaft which dr... | 05/01/1990 |
| 4920860 | Device for biasing a cylinder drum of a variable-displacement axial piston machine against an associated slide valve member A device for biasing a cylinder drum in a variable-displacement axial piston machine against an associated slide valve member comprises a compression spring means, the axial piston machine having between the cylinder drum and the drive disk a synchronizin... | 05/01/1990 |
| 4920861 | Load piston reset control mechanism Fluid systems for controlling clutch engagement of a vehicle drive train normally have modulating pressure relief valves to aid in smooth clutch engagement. It is desired in such systems to ensure that the system pressure is reduced during a shift so that... | 05/01/1990 |
| 4920862 | Trunk piston compressor The cylinders of the compressor each have a guide piston connected with a work piston with each being reciprocally mounted within a guide cylinder and work cylinder. In addition, seals are provided between the guide piston and the guide cylinder within a ... | 05/01/1990 |
| 4920863 | Plunger pump A plunger pump comprises a cylinder (1); a plunger (2) reciprocating within said cylinder; a sucking chamber (1a) formed upon a top of said plunger; a sucking pipe (4) and a discharge pipe (5) communicated with said sucking chamber; and slidable means (1b... | 05/01/1990 |
| 4920864 | Reinforced piston A reinforced lightweight metal piston having fibers within the piston crown to reinforce the crown surface to improve the thermal properties and wear resistance of the crown surface. The reinforcing fibers are embedded in the piston metal using a pressure... | 05/01/1990 |
| 4920865 | Device for extracting air from an automobile interior A device for extracting to atmosphere the air from the interior of an automobile passenger compartment, comprising at least one air outlet aperture (12) provided in a wall (11) of the luggage compartment (10), and at least one non-return valve (14) engage... | 05/01/1990 |
| 4920866 | Anti back draft device for flue Back draft is prevented in a conventional furnace or woodstove system in which the combustion gases are generally sufficient to generate the positive draft for combustion but occasionally fails due to pressure differences, combustion conditions or outside... | 05/01/1990 |
| 4920867 | Chimney screen A chimney screen device for covering the open end of a chimney to prevent access into the chimney by squirrels, birds and the like includes a rigid frame sized and constructed to be disposed upon and about an exposed end of a chimney flue liner, the frame... | 05/01/1990 |
| 4920868 | Electrically operated machine for making hot beverages An electrically operated coffee maker wherein the outlet of a water tank is separably connected with the lower end of a riser for hot water by a conduit which has an inlet fitting directly into the outlet of the tank and an outlet fitting directly into th... | 05/01/1990 |
| 4920869 | Household coffeemaker Coffeemaker comprising a filter 20 which is dripped on by a head 18 having a principal opening 30 adapted to drip on the central region of the filter, as well as a series of holes 34 spaced apart about said opening 30 and adapted to drip on the peripheral... | 05/01/1990 |
| 4920870 | Method for preparing beverages and beverage preparing machines A beverage is prepared employing a package (10) having a compartment (111) containing at least one beverage ingredient, e.g. roast and ground coffee. The package is located at a brewing station, an aqueous medium, e.g. hot water, is introduced into the pa... | 05/01/1990 |
| 4920871 | Beverage making appliance A beverage (tea and coffee) making appliance of the type having a reservoir wherein a supply of hot water for brewing is maintained and from which a volume of the hot water is displaced by an equal volume of a batch of cold water discharged by gravity fro... | 05/01/1990 |
| 4920872 | Apparatus for cooking corn on the cob A method of cooking corn on the cob wherein the corn is partially cooked in a parboiling assembly, removed, and then roasted, grilled or broiled on a roasting assembly. The roasting assembly comprises a heat source disposed adjacent a gridiron composed of... | 05/01/1990 |
| 4920873 | Stackable chafer assembly A stackable, portable chafer assembly comprising a stack of chafter units in which a first lowermost unit has a frame which supports a water pan and the other units of the first unit nest within that pan in compact fashion. The frame of the first unit is ... | 05/01/1990 |
| 4920874 | Method and apparatus for cooking and advertising food products A combination food cooking and advertising machine has a deep fat fryer, mechanical food manipulators in the fryer for dispensing, flipping and removing the food product, and motionless advertising signs which are mechanically connected to and are given m... | 05/01/1990 |
| 4920875 | Machine for skinning or slicing bacon or the like A bacon slicing or skinning machine has a housing for a set of conveyors including a traction wheel located beneath an elongated path for the products which are to be skinned or sliced. A blade holder is pivotably mounted at a level above the path adjacen... | 05/01/1990 |
| 4920876 | Refuse compactor A refuse compactor includes a refuse container housing an upright compaction ram actuated by a vertically oriented scissors mechanism. The scissors mechanism is actuated by vertical movement of a horizontal crossbar connected to one set of scissors arms. ... | 05/01/1990 |
| 4920877 | Wringer device An improved wringer device is provided for squeezing water from a cloth or chamois when fed between a pair of adjacent rollers. Each roller is made from thermoformed plastic, or molded elastomeric material with an outer surface defining a plurality of axi... | 05/01/1990 |
| 4920878 | Screen printer with plater sifting structure A printing machine for simultaneously performing multiple printing operations in a continuous manner includes: a number of platens supporting thereon articles to be printed; a plurality of printing heads designed to print a desired pattern onto the articl... | 05/01/1990 |
| 4920879 | Printing apparatus having an integral speed pickup wheel A wheel (15) is freely mounted on the shaft (2) of a printing head and is in contact at its periphery with a film which is to be printed. A tachymeter (10) is provided which detects the speed of rotation of the wheel (15) and transmits a corresponding sig... | 05/01/1990 |
| 4920880 | Cleaning machine for a printer A cleaning machine for a printer is provided for cleaning an outer peripheral surface of a cylinder of the printer with a cleaning cloth through a pressure pad mounted through a holder on a mount member supported by side plates of the frame of the printer... | 05/01/1990 |
| 4920881 | Method of cooling hot webs The method for cooling a hot web by passing it across a rotating thermally conductive chill roller having a circulating coolant therein. In accordance with this invention, one introduces as a coolant to the chill roller a liquid refrigerant at a temperatu... | 05/01/1990 |
| 4920882 | Electronic labeler with printhead and web sensor combined for concurrent travel, and assemblies of identification devices therefor An electronic labeling machine is disclosed which includes a printing mechanism with a carriage adapted for horizontal travel across assemblies of identification devices to be imprinted. A web sensor is attached to the carriage for concurrent travel there... | 05/01/1990 |
| 4920883 | Detonation transfer methods and apparatus In a high pressure, high temperature detonator for deep well use, an improved device is disclosed. It includes an elongate housing with axial bore and an electrical conductor at one end. A first explosive initiator is electrically ignited. In turn, a slee... | 05/01/1990 |
| 4920884 | Selectable lightweight attack munition This portable munition system has multiple modes of operation with the sensor inputs, output actuator circuits, and timing requirements determined by the control electronics. A self-check is performed initially before the munition can be armed. An indicat... | 05/01/1990 |
| 4920885 | Explosive charge containing magazine for RAM setting gun A propellant containing device for a power actuated tool used to drive fasteners into concrete and the like. A cartridge member has an inner substantially cylindrical recess. The recess has an inner area and is filled with propellant. A cap closure member... | 05/01/1990 |
| 4920886 | Anti-vehicle grenade Anit-vehicle grenade of the type comprising a head (1) extended by a tubular tail (8), an axial bore (6) going through the head and running into the bore (7) of the tubular tail (9), characterized in that, between the safety device (3), respectively the d... | 05/01/1990 |
| 4920887 | System for maintaining multiple warheads placed in a missile rotating on its longitudinal axis Disclosed is a system for the holding of multiple warheads, placed in a missile rotating on its longitudinal axis and dropped in trajectory through an end of the missile. Each stage of the warhead includes at least two distinct parts which have to be sepa... | 05/01/1990 |
| 4920888 | Subcaliber, finstabilized penetrator projectile A penetrator shell has at least a front and a rear high-density core element each having a front face and a rear and lying in a stack extending along an axis with the front face of the rear element engaging the rear face of the front element. The rear fac... | 05/01/1990 |
| 4920889 | Fin stabilized, subcaliber propelling cage sobot projectile A fin stabilized, subcaliber propelling cage sabot projectile including a projectile body having a high length to diameter ratio, i.e., an arrow projectile, and a discardable propelling cage sabot composed of a plurality of segments which coaxially surrou... | 05/01/1990 |
| 4920890 | Amusement ride A portable amusement ride incorporates a multi-functional trailer which can serve for hauling the amusement ride, when disassembled, and serve as an elevated track portion of the ride, when assembled. Electrically powered vehicles are guided and powered o... | 05/01/1990 |
| 4920891 | Rail conveyor and rail switches therefore Diversion-type switches and cross-type switches are provided for inclusion in suspended rail conveyor arrangements to form a rail conveyor system. Each of the switches includes at least one shiftable rail section movable between a first position of cooper... | 05/01/1990 |
| 4920892 | Portable rope tow A drive unit for a ski tow rope. The unit has a main frame with an engine having an output shaft mounted in the main frame. A drive pulley is driven by the output shaft and has a circumferential channel to receive the rope. Guide pulleys direct the rope i... | 05/01/1990 |
| 4920893 | Axle with magnetic guidance for railroad vehicles An orientable axle with independent wheels comprises a beam perpendicular the axis of the wheels. It also comprises sensors (16, 20) for measuring the position of the beam with respect to the track; a reference position with respect to the track is prede... | 05/01/1990 |
| 4920894 | Modular anti-spin unit for railway car door A modular add-on unit provides (14) anti-spin protection for a gear-operated locking system (13) of plug-in railway freight car doors (12). The unit has an input shaft (26) with a handle (36) attached thereto, and an output shaft (42) with a recess (40) t... | 05/01/1990 |
| 4920895 | Drafting device for the convenient containment of eraser shavings A drafting device connectable to a side of a drafting board having a top surface is disclosed. The device has a housing with a top, a pair of sides, a length, and an interior. A storage tray for drafting tools is affixed to the top of the housing. A remov... | 05/01/1990 |
| 4920896 | Portable game table arm cushion A portable game table arm cushion for providing a comfortable support for a user's forearms, the cushion being removably attachable to the forward edge of a desk or table by means of insertable clips, said cushion being conveniently portable by means of b... | 05/01/1990 |
| 4920897 | Beach and lawn table with umbrella holder A beach and lawn table which is affixed to the ground on which it rests by an auger projecting from the base of the table. The table has a single axially located leg which also provides a holder for the shaft of an umbrella. The table top is removably mou... | 05/01/1990 |
