Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 4280557 | Sonic apparatus for cleaning wells, pipe structures and the like An oscillator for generating sonic energy in a rotary progression vibration mode about a longitudinal axis, i.e., having quadrature related lateral vibration components, is lowered into a tube or pipe member, which may comprise an oil well casing. Attache... | 07/28/1981 |
| 4280558 | Sonic technique and system for facilitating the extraction of mineral material A first casing is sonically driven into an earthen formation bearing a mineral such as oil. A second casing is similarly sonically driven into the same zone of the formation at a location spaced from the first casing. Water is pumped from the first casing... | 07/28/1981 |
| 4280559 | Method for producing heavy crude A process for the in situ recovery of viscous oil from a subterranean formation is disclosed. Steam is injected into the formation via a well, permitted to soak, and heated fluids including heated viscous oil are produced sufficient to create a substantia... | 07/28/1981 |
| 4280560 | Potassium hydroxide clay stabilization process An aqueous solution having potassium hydroxide dissolved therein is injected into a subterranean sandstone formation containing water-sensitive fine particles, including clays. Potassium hydroxide stabilizes the fine particles for a substantial period of ... | 07/28/1981 |
| 4280561 | Valve A sleeve valve which may be made up as a part of a tubing string in which the valve member has two positions. Dogs carried by the valve member alternately cooperate with spaced grooves in the body in said positions. The dogs are alternately engageable by ... | 07/28/1981 |
| 4280562 | Distributor for fire protection sprinkler head A fire protection sprinkler head construction comprises a frame having at one end a water passage therethrough which normally is closed by a seal maintained in passage sealing position by a thermally sensitive strut which collapses in response to a predet... | 07/28/1981 |
| 4280563 | Auxiliary shovels for agricultural implement An auxiliary shovel operatively mounted on each side of an agricultural implement, each being laterally disposed relative to the usual rows of shovels. A ground marker laterally extending from each side of the implement and being automatically operable in... | 07/28/1981 |
| 4280564 | Earthworking machine A cultivating machine includes a forward row of subsoil tools and a pair of elongated cultivating rollers having support plates to which soil penetrating T-section bars or knife edged bars are attached. To the rear of the cultivating rollers, a trailing s... | 07/28/1981 |
| 4280565 | Soil working machine A soil cultivating machine includes a frame and a plurality of cultivating members in one or more groups journalled to said frame. Each group is driven to rotate about a horizontal shaft extending substantially transverse to the direction of machine trave... | 07/28/1981 |
| 4280566 | Agricultural disk having non-directional fracture properties A hardened agricultural disk, which is manufactured from a straight rolled steel, is provided with concentric rows of softened oblong areas or oblong openings, which are arranged radially inwardly of the periphery of the disk in non-diametrical alignment ... | 07/28/1981 |
| 4280567 | Device for driving root supports of poles into the ground The invention relates to a device for driving root supports of poles into the ground by a weight that is guided by a guide. The weight is lifted up by a rope that passes over a pulley on the guide. The lower portion of the guide is provided with an instal... | 07/28/1981 |
| 4280568 | Sidewall sampling apparatus Apparatus for taking a sample of earth formations surrounding a borehole. A core sampling projectile is provided which has a core-taking barrel with a frontal cutting edge and is releasable secured to a base member of relatively more mass than the barrel.... | 07/28/1981 |
| 4280569 | Fluid flow restrictor valve for a drill hole coring tool An apparatus operable on a wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises a hydraulically operated backup shoe for wedging the apparatus at a selected location in the drill hole, a hydraulic motor with a drillin... | 07/28/1981 |
| 4280570 | Drill hammer An impact and rotary rock drilling tool for operation by compressed air fed through a three-part control unit that contains a valve and duct system and is housed in a cage mounted to an outer tube. A central spindle tube is positively connected to the con... | 07/28/1981 |
| 4280571 | Rock bit An improved lubrication and seal system for a rock bit that includes a bit body arranged to be connected to a drilling string or the like and having an axle portion thereon. A cutting member is journaled on the axle portion and provides a cavity between t... | 07/28/1981 |
| 4280572 | Chisel for a percussive tool A percussive tool, particularly a chisel for percussive working in rock, has a body portion, and a nozzle arrangement in the body portion, which is operative for forming a high-speed flow of a high-pressure fluid, particularly liquid, and directing the sa... | 07/28/1981 |
| 4280573 | Rock-breaking tool for percussive-action machines A rock-breaking tool for preferable use in self-propelled percussive machines for boring wells, comprising a casing with a pointed portion and an end face. The casing has an annular cutting edge formed by the pointed portion and inner tapered surface ther... | 07/28/1981 |
| 4280574 | Balance with selectable multiple reading scales Disclosed is a weighing balance having a material-receiving pan (3) and an indicator (4) that moves in a slot (5) of housing (1) to indicate the weight of the material along the graduated scale (6). On the opposite side of the slot (5) from the graduated ... | 07/28/1981 |
| 4280575 | Apparatus for cutting and metering slabs or bales of unvulcanized rubber Apparatus is provided for cutting and metering slabs or bales of unvulcanized rubber to be fed to a single rubber mixing machine. The apparatus includes a conveyor belt and a carriage arranged to transport bales of rubber along parallel paths. A cutting m... | 07/28/1981 |
| 4280576 | Low profile tension mounted load cell industrial scale An industrial scale including a plurality of tension mounted load cells disposed along and spaced outwardly from the longitudinal side of the weighing platform. Retractable support structures are spaced along the longitudinal sides of the weighing platfor... | 07/28/1981 |
| 4280577 | Temperature-protected weighing apparatus with bearing enclosure Weighing apparatus of the electromagnetic load compensation type is disclosed including a pivoted transmission lever that connects the compensation coil for movement relative to the stationary permanent magnet field in accordance with the displacement of ... | 07/28/1981 |
| 4280578 | Motorized walker for the disabled A walker device for aiding invalids and other persons having walking difficulties has an upstanding open-bottomed framework toward and within which a person can take steps while holding on and being supported by the framework. The framework is provided wi... | 07/28/1981 |
| 4280579 | Control for tracked vehicle steering mechanism A tracked vehicle includes an engine driven transmission having a pair of output shafts, each of which engages a planetary gear set for driving chain treads. An infinitely variable, hydrostatic/hydrodynamic, superimposed steering mechanism includes a neut... | 07/28/1981 |
| 4280580 | Proximity detector system for a medical diagnostic device A mobile medical diagnostic device having a mobility chassis with two supporting wheels and a central steerable drive wheel. The device has an electrical power steering system controlled by two synchronized handles operable by wrist action of an operator ... | 07/28/1981 |
| 4280581 | Motor and pedal driven bicycles An electrically assisted bicycle is disclosed, including a modified elongated frame, such that the storage battery and motor may be mounted at a low level between the pedals and the rear wheel for a more stable and smooth ride and to lessen the likelihood... | 07/28/1981 |
| 4280582 | Vehicle frame arrangement in motorized two-wheeled vehicle A frame for a motorcycle is disclosed of the type including a main frame which extends rearwardly and downwardly from the journal for the steerable front wheel, and, which at its lower end is rigidly attached to a casing of the drive motor. In order to pr... | 07/28/1981 |
| 4280583 | Automatic differential control apparatus A multi-position clutch is disclosed for use with a between-front-and-rear axle differential of a multiple drive axle vehicle, having an engaged position to eliminate differential action in transmitting power between front and rear axle, normal intermedia... | 07/28/1981 |
| 4280584 | Emergency locking retractor An emergency locking retractor comprises a lock member capable of assuming a position in which it engages an engaging portion integral with a webbing take-up shaft to lock the rotation of the shaft in webbing draw-out direction and a position in which it ... | 07/28/1981 |
| 4280585 | Multi-sound speaker system A speaker enclosure with a multiplicity of sound-openings in which the back sound pressure from a plurality of front radiating speaker-units mounted in a vertical row on a baffle board, is completely divided at the back of the speaker-units by a centrally... | 07/28/1981 |
| 4280586 | Speaker enclosure The invention is an improved enclosure for electronic speakers used in sound reproduction equipment. The enclosure is in the form of a pyramid with the speaker mounted at a precise position within the enclosure to give improved results in sound reproducti... | 07/28/1981 |
| 4280587 | Noise-suppressing jet engine nozzles and method A discharge nozzle of a jet engine has lobes, tubes or deflectors for promoting mixing of the engine discharge flow with ambient air to reduce jet noise. By providing the lobes, tubes or deflectors at only the upper portion of the discharge nozzle, jet no... | 07/28/1981 |
| 4280588 | Anti-pollution manifold for I.C.E. An elongated hollow body closed at its opposite ends is provided and constucted of high heat resistant metal. The body includes an exhaust gas outlet opening outwardly of one side thereof centrally intermediate its opposite ends and extending in a directi... | 07/28/1981 |
| 4280589 | Elevating device An elevating device consists of a base frame, usually mounted on running wheels, a turntable on the base frame, a vertical first post on the turntable and first and second arm means mounted on the post. The first arm means is a parallelogram linkage conne... | 07/28/1981 |
| 4280590 | Stabilizing attachment for ladders A pair of ladder brackets held together by an elastic tie at one end of each having U-shaped clamps at the other ends for engaging the narrow sides of the side rails of a ladder when the brackets are fitted to the outer wide sides of the side rails. The e... | 07/28/1981 |
| 4280591 | Wheel line chain lubricator The chain lubricating system of this invention includes an oil reservoir and a partially submerged sprocket wheel. The sprocket wheel is loosely carried on a stationary axle mounted within the reservoir to permit both rotation and lateral slidable movemen... | 07/28/1981 |
| 4280592 | Full free-lift upright for lift truck A lift truck upright having a fixed upright section, a telescopic upright section, and a load carrier mounted on the latter section. An asymmetric lift cylinder assembly is located adjacent one side of the upright in a position which provides improved ove... | 07/28/1981 |
| 4280593 | Diagonal elevator A diagonal elevator adapted to move in an inclined path between a lower first station and an upper second station spaced vertically and horizontally from the first station, including an elevator car guided for movement along a diagonal path between the fi... | 07/28/1981 |
| 4280594 | Brake wear indicator A disc brake wear indicator which in use is secured within a bore in the carrier member of a pinsliding caliper disc brake comprises electrical conductors which are normally electrically connected by a ring secured to a sleeve. A probe is secured to one o... | 07/28/1981 |
| 4280595 | Positive brake for a vehicle wheel A hand brake for a wheeled vehicle comprises an operating shaft carried within a sleeve affixed to the frame of the vehicle to accommodate axial displacement and rotation of the shaft attendant to shifting the brake between respective braking and non-brak... | 07/28/1981 |
| 4280596 | Air brake arrangement for center sill-less hopper cars A center sill-less hopper car is provided with a body-mounted brake arrangement using a conventional brake beam and brake system. The arrangement includes the mounting of the individual components in a manner which accommodates the operation of the discha... | 07/28/1981 |
