Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4164792 | Device for tightening the waist of a garment A device for tightening the waist of a garment comprising a sheath provided around the waist of a garment which has an opening near each end thereof and a pair of strings, each of which is secured to one end of said sheath and is passed through the sheath... | 08/21/1979 |
| 4164793 | Lunate implant A flexible implant for replacement of the lunate bone of the wrist includes a one-piece body of resilient material defining a planar triquetrum face having a general U-shape in plan and further including a stabilizing stem extending outwardly from and per... | 08/21/1979 |
| 4164794 | Prosthetic devices having coatings of selected porous bioengineering thermoplastics Prosthetic devices, such as orthopedic, dental and maxillofacial prostheses, are provided which are composed of an inner load bearing, functional component and an outer foamed or sintered porous coating of selected bioengineering thermoplastics. The bioen... | 08/21/1979 |
| 4164795 | Portable urinal The urinal has an inlet tube which, when properly assembled on its container, will not discharge the contents of the container. The inlet tube is removable for emptying and washing the container and a special form of connection is provided to insure that ... | 08/21/1979 |
| 4164796 | Sink strainer assembly A sink strainer assembly includes a hollow strainer body, a molded hollow plastic nipple which is a force fit within a lower hub section of the strainer body and a filtering screen assembled to the nipple in the hub section of the strainer body to prevent... | 08/21/1979 |
| 4164797 | Zipper construction for mattresses and the like A mattress construction comprising a filler with a surrounding mattress cover. The cover defines an opening along at least one of its ends, and a zipper is provided for closing the opening. A fabric section of the cover is positioned in overlapping relati... | 08/21/1979 |
| 4164798 | Seat cushion The present invention comprises a seat cushion for preventing excessive pressure on the coccyx of a person sitting on the cushion; the cushion is made from a seat pad having a casing with a resilient cushioning element positioned within; the cushioning el... | 08/21/1979 |
| 4164799 | Machine for cleaning tubes and pipes The safety of a machine for cleaning tubes and pipes constructed so as to include an elongated cylinder, a piston located within the cylinder, a non-round piston rod attached to the piston so as to extend out of one end of the cylinder and hydraulic compo... | 08/21/1979 |
| 4164800 | Combination mop and wringer A combination mop and wringer comprising a handle and a replaceable strand type mop positioned at one end of the handle. A slide arm reciprocates relative to the handle from an initial position to a wringing position to push a pivotal, split ring member o... | 08/21/1979 |
| 4164801 | Bear claw ice scraper An ice scraper comprising a one-piece body defining a handle section, a downwardly curved intermediate section, and a blade region comprising a plurality of downwardly curved, independently flexible, resilient scraping fingers. In use, the scraping finger... | 08/21/1979 |
| 4164802 | Detergent holder on windshield wiper arm A replaceable cartridge is detachably mounted on a rod which is detachably connected with a windshield wiper arm on a vehicle so as to place the cartridge alongside the wiper blade. The cartridge contains a detergent stick and is arranged to admit rain wa... | 08/21/1979 |
| 4164803 | Paint pan for applying paint to pads and rollers A convertible painting assembly includes a paint roller pan, the pan having a removable partition wall extending transversely between sump and trough portions therein. A removable paint transfer roller is rotatably mounted between the partition wall and t... | 08/21/1979 |
| 4164804 | Latch device Latch for luminaire clamp band comprises hinged link member connected to a latch lever, and a channel-shaped spring catch attached to the link member for holding the link member in engagement with the latch hook.... | 08/21/1979 |
| 4164805 | Apparatus for dividing warps with leases An apparatus for dividing warps by means of leases, which is of the type having divider elements for the momentary edge warp end or thread and a feeder for the divided or separated threads for feeding such threads to tying elements. The divider elements s... | 08/21/1979 |
| 4164806 | Method for attaching an end bead to a musical instrument string A metallic end bead is attached to the main wire of a musical instrument string by providing the bead in apertured form, roughening or otherwise irregularizing its hole surface and then plastically deforming it to press its hole surface irregularities int... | 08/21/1979 |
| 4164807 | Method of forming a coldworked joint A method of coldworking a hole through a work piece which includes placing a seamless tubular member within the hole with a prescribed hoop strength to allow the tubular member to be expanded and prescribed column strength which prevents axial movement of... | 08/21/1979 |
| 4164808 | Apparatus for producing sets of accurately and identically sized wire leads Apparatus for high-speed production of sets of accurately and identically sized insulated wire leads having wire terminals at the lead ends comprises: a feed mechanism including counter-reciprocating wire feed clamps for repeatedly drawing a plurality of ... | 08/21/1979 |
| 4164809 | Machine tool with automatic tool change apparatus In a machine tool with an automatic tool change apparatus, a tool storage magazine for removably storing a plurality of tools is installed, extending within a column which slidably supports a spindle head. The column is formed with an opening. Means are p... | 08/21/1979 |
| 4164810 | Automatic tool changer for machine tool A tool storage drum which is adapted to receive and store a plurality of toolholders is rotatably mounted on top of the upright of a horizontal machining center behind the spindle thereof. A tool changer carriage carrying a tool change arm is pivotally mo... | 08/21/1979 |
| 4164811 | Process for making a semiconductor component with electrical contacts A semiconductor component with electric contacts is formed which includes a semiconductor body having metal contact layers formed in ohmic contact with at least two side surfaces thereof. In the process of making the component, a layer sequence is made in... | 08/21/1979 |
| 4164812 | Termination tool for assembling electrical cables to connectors A termination tool is disclosed for assembling electrical cables, such as ribbon cables or the like, to an electrical connector which has receptacle means for receiving a cable in electrical termination with conductive contacts on the connector. The tool ... | 08/21/1979 |
| 4164813 | Electrically powered knife An electrically powered knife has a handle with projecting removable knifeblades driven from a drive unit containing an electric motor, the drive unit being readily disconnectable from the handle so that this can be cleaned without risk of damage to the m... | 08/21/1979 |
| 4164814 | Personal use device for removing tartar from the inner side of teeth A personal dental care device including a dentist mirror and a flat, stiff tooth scraper projecting substantially perpendicular to the mirror, located at the edge of the mirror and either fixed on the mirror frame or rotatably positionable around the peri... | 08/21/1979 |
| 4164815 | Device for measuring a human foot A device for measuring the human foot comprises: (a) at least one element consisting of a supporting surface for the bottom of the heel and a stop for the back of the heel; and (b) a graduated tape connected to the above element and surrounding the foot i... | 08/21/1979 |
| 4164816 | Electronic measuring tape A device for electronically indicating the measured distance between two points. A flexible tape retained in coiled fashion in a housing is extended therefrom between the two points to be measured. A Moire interference pattern is produced by movement of t... | 08/21/1979 |
| 4164817 | Conduit bending level A conduit bending level comprising a body of molded resilient material which includes a plurality of progressively tapering coaxially stepped frustoconical body portions each having an outer surface adapted to be received by force-fit into the open end of... | 08/21/1979 |
| 4164818 | Method for preventing adhesiveness of a hydrogel of a water-soluble acrylamide-type polymer A method for preventing the surface of a hydrogel of a water-soluble acrylamide-type polymer from being tacky, which comprises coating the surface of the hydrogel with at least one of a higher fatty acid or an alkali metal salt thereof.... | 08/21/1979 |
| 4164819 | Paint drying oven In an oven for drying paints on metal strips or bands travelling continuously therethrough, several incinerators are mounted directly on the oven, and an external incinerator is also provided for incinerating the gases released during the drying operation... | 08/21/1979 |
| 4164820 | Snow remover and vacuum sweeper A fluid containing insulated tank is mounted on a vehicle chassis having an engine driving a hydraulic system and an electric energy generating unit. The roadway cleaning apparatus, including housing contained screw conveyors, is mounted transversely of t... | 08/21/1979 |
| 4164821 | Snow plow blade attachment system By providing a plow and scraper blade assembly with a camming and securing member at one end and a pivotable, blade locking member at the other end, along with a cooperating, interfittingly engageable plow blade, a plow and scraper blade assembly is achie... | 08/21/1979 |
| 4164822 | Portable map reading system A portable map-display system for auto, boat and airplane uses and the like includes a plurality of translucent maps and a compact light box proportioned for back-lighting one map at a time. To prevent unshielded glare from the light-box and to assure pro... | 08/21/1979 |
| 4164823 | Luminous effects device A luminous effects device including a partially silvered mirror, a frusto-conical reflector having a plurality of lights disposed about its inner periphery and a spherical reflector, all of which are disposed within a closed container and aligned in serie... | 08/21/1979 |
| 4164824 | Changeable character sign structure Sign having self-storing characters which are quickly changeable. The face of the sign has a patterned array of openings juxtaposed against a contrasting background. The background may be supplied by color contrast and/or by illumination.... | 08/21/1979 |
| 4164825 | Device for reducing firearm recoil A device for reducing firearm recoil comprises a case having an elongated interior chamber therein, a piston received in the chamber, a plurality of vanes extending from the piston surface, and a liquid substantially filling the chamber. The piston is sup... | 08/21/1979 |
| 4164826 | Salmon jig A salmon jig is disclosed on the slip-hook principle with a shape and related line connection arrangement imparting a unique action not attained by other jigs. It comprises an elongated plate-like lead body tapered in width from its leading end to its tra... | 08/21/1979 |
| 4164827 | Action toy An action toy comprising a housing in the shape of a face. The housing has two spaced openings which form the eyes of the face. A pair of plates are disposed within the housing in juxtaposition with the openings. Each plate bears an eyeball design. A pair... | 08/21/1979 |
| 4164828 | Abrasive machine for stones An abrasive machine for stones, which comprises one or more abrasive units and means for feeding the stones, each of said units having a plurality of abrasive tools each provided with a grindstone rotatably mounted thereto, said abrasive tools being arran... | 08/21/1979 |
| 4164829 | Inflatable structure A self-supporting inflatable structure useful, for example, as an inexpensive, readily assembled planetarium, such structure being made of an extensible material having a plurality of panels, each shaped so as to form, when inflated, a hemispherical dome-... | 08/21/1979 |
| 4164830 | Double-glazed doors or windows and frame assemblies therefor The invention relates to a frame assembly for making double-glazed doors or windows comprising a metal extrusion having a cross-section, preferably an H-section, providing an open channel having oppositely facing abutments along the internal surfaces of t... | 08/21/1979 |
| 4164831 | Heat insulating and sound absorbing concrete wall panel Presented is a concrete wall panel that provides both thermal insulation and sound absorption while possessing the necessary rigidity and strength to permit the panel to be manufactured at a site remote from the point of installation, transported to the p... | 08/21/1979 |
