Patents Represented by Law Firm Larson, Taylor and Hinds
  • Patent number: 4273980
    Abstract: An electrical apparatus such as a switch comprises a housing and a push-button. A spring-loaded catch mechanism holds the push-button alternately in a rest position and in a working position for which the push-button protrudes more or less from the housing. The catch mechanism comprises a catching lever which is mounted through an integral pivot accommodated in a hole of a wall of the housing and which has a depressed area receiving a pin carried by a wall of the push-button. The depressed area is bounded by ramps which are successively engaged by the pin for oscillating the catching lever about its pivot. A resilient finger, integral with the catching lever, brakes the latter by pressing against the wall of the housing. The catching lever, the housing and the push-button are made of plastic material.
    Type: Grant
    Filed: October 24, 1979
    Date of Patent: June 16, 1981
    Inventor: Jean Rogero
  • Patent number: 4271748
    Abstract: The invention disclosed is a safety device for preventing premature firing of a rocket due to radiation directed at the aft-end of the rocket. The safety device which is attached to the aft-end of a rocket comprises an electrical contact ring which is electrically connectable to the rocket igniter, a shielding means, also electrically connected to the igniter, for shielding the igniter and firing circuit from electromagnetic radiation, insulating means between the electrical contact ring and shielding means and electrical switch means connected between the shielding means and the electrical contact ring.
    Type: Grant
    Filed: March 20, 1979
    Date of Patent: June 9, 1981
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: Frederick D. Ward
  • Patent number: 4271733
    Abstract: A rotary tool for working in a cramped and possibly hostile environment. The tool can be clamped into position and left to work automatically. The tool has a resiliently biased pin and a ratchet driven cam for ensuring that the working unit cannot become overloaded. Working cannot go beyond a preselected level owing to the action of the ratchet driven cam which is only stepped to a certain level on a flange which strikes a lever when that level is reached. The work done can be cutting, welding preparation or trepanning.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: June 9, 1981
    Assignee: United Kingdom Atomic Energy Authority
    Inventor: Ronald L. Stone
  • Patent number: 4272474
    Abstract: A process for producing articles of ultra high molecular weight high density polyethylene is disclosed which avoids long heating and cooling cycles, and compacting pressures in the order of 3,000 to 4,000 lbs/sq. inch. The resin is intensively mixed and thermokinetically heated in an enclosed container with a plurality of blades attached to arms rotating about an axis with a blade tip speed of at least 18 m/sec. until the resin reaches a desired discharge temperature of at least 135.degree. C. After being discharged from the mixing step, the ultra high molecular weight resin is formed into the desired shape within a time such that degradation does not occur.
    Type: Grant
    Filed: November 6, 1979
    Date of Patent: June 9, 1981
    Assignee: Synergistics Chemicals Limited
    Inventor: Zenas Crocker
  • Patent number: 4268924
    Abstract: A syphon-operated closet bowl flush tank of the kind comprising an inverted bell (10) containing a liftable plunger disc (12) to initiate syphon action has a flush control valve (14) comprising a tubular body part (16) mounted vertically in the top (18) of the bell and extending above the bell. The valve further has a stem (20) movable in and guided by the body part, is shaped to define a flow path (22) through the body part, and has lower (24) and upper (26) portions extending respectively below and above the top of the bell. The body part has a downwardly facing valve seat (25) inside the bell and the stem has an upwardly facing valve seat (31) co-operating with the downwardly facing seat to make a valve closure. An inverted bell float (38) is provided on the top of the stem. The body part includes a spring ring (30) carried in a flange (23) of the tubular body part so that the valve can be fitted to an existing bell by access from only the top of the bell.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: May 26, 1981
    Inventors: William Price, Howard W. Ellison
  • Patent number: 4268989
    Abstract: A floatable toy has a body which even when filled with water is inherently buoyant, has an aperture for readily filling with water and when floating in the level of the water within is higher than the level of surface upon which the body floats and having restrictive flow passages from the interior to the exterior to below the surface to produce rotational or other movement.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: May 26, 1981
    Inventor: David J. Wickham
  • Patent number: 4269189
    Abstract: A disposable skin conducting electrode assembly and electrode is disclosed for use on a patient wherein the electrode assembly comprises a gel pad, an electrode and an adhesive pad. The electrode is a thin conductive plate containing an interior area or aperture. In one particular embodiment, the electrode is doughnut shaped. The gel pad covers one side of the conductive plate and is similarly shaped. The adhesive pad covers the other side of the electrode and extends over the aperture and beyond the periphery of the gel pad. The adhesive provides good contact around the external edges of the gel pad, and due to the aperture, the adhesive pad provides good adhesive contact to the patient around internal edges of the gel pad as well. An external conductor is connectable to a conductive, single piece solid metal stud or post attached to the electrode and extending through an orifice in the adhesive pad.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: May 26, 1981
    Assignee: Consolidated Medical Equipment Inc.
    Inventor: William W. Abraham
  • Patent number: 4269874
    Abstract: A spray of ink, paint, or other marking liquid is formed and sprayed through a stencil member for marking a part with a stencil character. Various means are provided to periodically move the stencil member for removal of marking fluid to keep the system clean. In one system, the stencil member is rotatable and marking fluid is removed periodically by centrifugal force by rotating the member at a sufficient speed. Removal of the marking fluid may be facilitated by the application of solvent or fresh marking fluid. In another embodiment, the stencil member is moved to a marking liquid removal location where the marking liquid is removed by suction, solvent action, and the like. The removed marking liquid may be collected by providing an absorbent member positioned to receive the removed liquid, or by providing collecting gutters or the like.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: May 26, 1981
    Assignee: Diffracto Ltd.
    Inventors: Timothy R. Pryor, David M. Alway, Omer L. Hageniers
  • Patent number: 4269318
    Abstract: An improved sheet metal shelf is disclosed which may be made without welding, thus allowing prepainted or finished metal sheet to be used. The shelf is a one piece metal shelf having a top panel, side walls and end walls extending down from the sides and ends respectively of the top panel, and co-operating means on the side and end walls for mechanically joining the side and end walls together at the corners of the shelf.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: May 26, 1981
    Inventors: Ben Levitt, Irving Levitt
  • Patent number: 4269235
    Abstract: Method and apparatus for sequentially winding a plurality of windings on a winding form and for transferring the windings sequentially from the winding form to a collecting tool such that the plurality of windings are disposed on a collecting tool for subsequent collection axially through an aperture of a stator sheet packet positioned in adjacency with said collecting tool. In accordance with the invention, during the transition from winding one winding on the form and winding the next winding on the form, the winding wire is held clamped at a point within the peripheral region of the windings disposed on the collecting tool to be drawn through the aperture during subsequent collection.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: May 26, 1981
    Assignee: Balzer & Droll
    Inventor: Willi Muskulus
  • Patent number: 4269725
    Abstract: The present invention provides washing compositions in which all or part of the detergent builder salt is provided by a mixture of zeolites 13X and 4A. Preferably the weight ratio of 13X to 4A is in the range of 50:50 to 85:15 and especially from 65:35 to 85:15. Especially in the preferred ranges of weight ratios the mixtures are generally more effective at total hardness removal from the wash water than would be expected from the hardness removing capabilities of the zeolites 13X and 4A by themselves, leading to improved washing performance of the composition. In some particularly desirable embodiments part of the builder salt comprises STPP, and in others a minor part of the builder salt comprises a glassy phosphate, preferably together with an ethyleneamine (methylenephosphonic acid) complexing builder salt.The compositions of the present invention are suitable for cleaning, in particular, fabrics or hard surfaces.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: May 26, 1981
    Assignee: Laporte Industries Limited
    Inventors: Eileen Smith, David A. Morgan
  • Patent number: 4268381
    Abstract: A rotary pulp screening device is disclosed which is less sensitive to variation in pulp flow, pulp consistency and pressure than existing pulp screens. The device is of the vertical pressure type and includes a cylindrical housing having an upper inlet chamber and a lower screening chamber with a disc ring dividing the upper chamber from the lower chamber, an inlet aperture in the upper chamber, a cylindrical screen mounted within the lower chamber, a rotary impeller mounted for rotation about a central vertical axis within the screen, the impeller being approximately in the form of a paraboloid, means for rotating the impeller, impeller blades radiating from the impeller and extending to within a short distance of the screen over the length of the screen, at least two dilution systems for diverting dilution water into different areas of the screen and a pulp discharge outlet from the lower chamber outside the pulp screen.
    Type: Grant
    Filed: May 3, 1979
    Date of Patent: May 19, 1981
    Assignee: Uniweld Inc.
    Inventor: Anthony W. Hooper
  • Patent number: 4267982
    Abstract: A bark shredder is disclosed for shredding bark and other waste wood products into small pieces. The shredder rotates in either direction unlike existing bark shredders which allows twice the normal operating time between servicing. The shredder has a casing defining a cylindrical working chamber with a top inlet and a bottom symmetrical outlet. A rotor is mounted axially in the chamber and a plurality of fixed shredding elements are attached to the casing in a circle at one level of the chamber intermediate the inlet and outlet, the fixed elements extend radially inwards. The rotor has a plurality of rotating shredding elements pivotally attached thereto and located above but adjacent to the fixed elements. The fixed and rotating elements are shaped to co-operate with each other to shred material in the chamber when the rotor is rotated in either direction.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: May 19, 1981
    Assignee: Uniweld Inc.
    Inventor: Anthony W. Hooper
  • Patent number: 4268156
    Abstract: A washing apparatus for washing photographic materials is disclosed. The apparatus has an aerator which can be adjusted to supply air and water at varying flow and water pressures and overcomes other problems in print and negative washers of this type. The apparatus comprises a tank for holding photographic materials such as prints and negatives, a plurality of fluid entrance holes at the bottom of the tank and a fluid distribution system connecting the plurality of fluid entrance holes to an inlet outside and adjacent the bottom of the tank. A removable aerator means is provided, adapted to fit into the inlet of the fluid distribution system, the aerator means has a connection to a water supply and a water jet within a tubular housing which has an inside cross sectional area that may be changed to vary the flow of water through the jet.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: May 19, 1981
    Inventor: Edward Kostiner
  • Patent number: 4268664
    Abstract: 1-N-Isoseryl- or 1-N-(L-4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B is prepared through a new route starting from 3',4'-dideoxy-3',4'-didehydrokanamycin B, which comprises the steps of protecting all or some of the four amino groups other than the 1-amino group of the starting material with an amino-protecting group, reacting the partially amino-protected derivative or derivatives thus formed with isoserine or L-4-amino-2-hydroxybutyric acid or a reactive derivative thereof having the amino group unprotected or protected whereby to acylate the 1-amino group of the former, eliminating the amino-protecting group or groups from the acylated product and reducing the 3',4'-olefinic double bond of the product by catalytic hydrogenation, the last two steps being effected in order or simultaneously or in the reverse order. Also provided are new, useful intermediate compounds during the process.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: May 19, 1981
    Assignee: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
    Inventors: Hamao Umezawa, Shinichi Kondo
  • Patent number: 4266794
    Abstract: A two-wheeled vehicle similar to a bicycle has a frame comprising four pivotably interconnected frame members of which the lower one is provided with a bearing for a sprocket wheel of a chain drive. A crank arm is connected to the sprocket wheel and cooperates with a connecting rod pivotably connected to the upper frame member carrying a saddle. Pedals are mounted on the lower frame member or the front frame member, the latter guiding the steering handle and the front wheel fork. The driving torque is achieved by alternatively shifting the weight between the saddle and the pedals. The saddle moves up and down reciprocally to the pedals and the steering handle forth and back giving the illusion of riding on horseback. The same structural principle is suitable also for a home-trainer.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: May 12, 1981
    Inventor: Hans G. Bals
  • Patent number: 4267099
    Abstract: This invention provides a process for preparing an aqueous dispersion of a rosin-base material by a so-called inversion method, the process being characterized in that the dispersant is at least one member selected from the group consisting of:(a) salt of sulfonic acid represented by the formula ##STR1## wherein R.sup.1 is a hydrocarbon residue having 4 to 18 carbon atoms, m is an integer of 1 or 2, n is an integer of 4 to 25, X is hydrogen or hydroxyl, and M is a monovalent cation, and(b) salt of sulfuric acid half ester represented by the formula ##STR2## wherein R.sup.2 is hydrogen or lower alkyl, A is straight-chain or branched-chain alkylene having 2 to 3 carbon atoms, p is an integer of 4 to 25, and Q is a monovalent cation.The aqueous dispersion obtained by the process of the invention have excellent sizing effects, very high storage, mechanical and dilution stabilities, and greatly reduced foaming properties.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: May 12, 1981
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Toshiharu Okumichi, Kimio Kawatani
  • Patent number: 4267092
    Abstract: A filler composition consists of 60 to 85% by weight of silica, dolomite and/or calcite of size below 150 .mu.m and of average size above 20 .mu.m, and 40 to 15% by weight of an aqueous emulsion of 40 to 70% solids of a resin binder mixture comprising a quick drying polymer emulsion having a minimum film forming temperature above 5.degree. C. and a flexible polymer emulsion having a minimum film forming temperature below 5.degree. C., the polymer in the emulsion of minimum film forming temperature above 5.degree. C. constituting 60 to 90% by weight of the total polymer in the emulsions.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: May 12, 1981
    Assignee: Polycell Products Limited
    Inventors: Denis V. Glaser, Norman Heeley
  • Patent number: 4266955
    Abstract: A filter assembly for particle-in-gas filtration comprises ducts leading to a filter housing which is removable from the ducts and is provided with covers to prevent egress of material from the housing during transport. Covers may be also provided for the ducts. The surfaces of the duct cover and housing cover which are exposed to the environment when the housing is removed may be shielded while gas is passed through the assembly to minimize the exposure of the surfaces to the gas passing through the assembly.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: May 12, 1981
    Assignee: United Kingdom Atomic Energy Authority
    Inventor: Stanley Hackney
  • Patent number: D259304
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: May 26, 1981
    Inventor: Bryan Ball