Patents Represented by Law Firm Dugger, Johnson & Westman
  • Patent number: 4095858
    Abstract: A plurality of modules that are generally P-shaped and are of the same size and shape which may be arranged in different stacked relationships to form book cases or the like. As to each module, the closed loop of the P is of a generally rectangular box-shape construction while the leg of the P extends outwardly of the closed loop coextensive and coplanar with one side of the closed loop. The modules are stacked so that the walls thereof are inclined. Optionally shelves may be mounted by the closed loops.
    Type: Grant
    Filed: February 2, 1977
    Date of Patent: June 20, 1978
    Inventor: John L. Hopf
  • Patent number: 4089750
    Abstract: A water distiller arrangement which provides for an efficient distillation process wherein the inlet water supply is controlled as a function of the temperature of the output of the distiller, and inlet water is preheated in an interior chamber surrounded by a passageway through which the water vapor passes after leaving the boiling chamber and while it condenses.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: May 16, 1978
    Inventors: Fred C. Kirschman, Wallace B. Bolte
  • Patent number: 4089036
    Abstract: A capacitive type load cell utilizing a support, a diaphragm member mounted with respect to said support for movement relative thereto, said diaphragm having a conductive surface, and a capacitor plate attached to the diaphragm so that upon deflection of the diaphragm there will be relative movement between the diaphragm and the capacitor plate. The diaphragm is constructed to provide free edge bending characteristics both at its outer peripheral edges, and between the diaphragm and the load support button, to thereby reduce radial bending stresses in the diaphragm during loading.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: May 9, 1978
    Assignee: Rosemount Inc.
    Inventor: Robert L. Geronime
  • Patent number: 4087693
    Abstract: Sensors including radiation detectors and the like for use within the core of nuclear reactors and which are constructed in a manner to provide optimum reliability of the sensor during use.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: May 2, 1978
    Assignee: Rosemount Inc.
    Inventors: William L. Brown, Robert L. Geronime
  • Patent number: 4086908
    Abstract: A highly efficient, low cost, heat transfer sheet providing for transfer of heat from the sheet to a fluid and finding particular use in solar collectors.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: May 2, 1978
    Assignee: Frank D. Werner
    Inventors: Frank D. Werner, Richard C. Greig
  • Patent number: 4087576
    Abstract: A greeting card which includes a folding, three-dimensional hanging ornament that can be punched out of panels of the card while the greeting itself can be separated for reference and saving, and the ornament may be hung for decorative purposes. The combination provides an attractive remembrance and combines the usefulness of a three-dimensional decoration and with the ability to preserve the greeting in card form.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: May 2, 1978
    Inventor: Michael P. Patterson
  • Patent number: 4084597
    Abstract: A collapsible fish house that includes a base having a floor, interior walls inclined upwardly and outwardly of the floor, a perimetric top flange joined to the interior walls, exterior walls extending downwardly and outwardly of the top flange, and a horizontal perimetric flange joined to the lower edges of the exterior walls; a roof having a top wall provided with longitudinal ribs, and of a size and shape to overlay the top flange, roof walls sloped downwardly and outwardly of the roof top wall, and a perimetric portion joined to the lower edges of the last mentioned roof walls that in a fish house collapsed condition seats on the horizontal flange; collapsible walls made of, for example, canvas, having upper edges joined to the roof, lower edges joined to the top flange, and a closable entry; and telescopic poles having lower ends removably mounted by the base exterior of the canvas and upper ends removably mounted in holes in the roof to support the roof in an elevated condition relative the base.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: April 18, 1978
    Inventor: Richard B. Compton
  • Patent number: 4084015
    Abstract: A greeting card which includes an ornament that can be folded into a three-dimensional bird cage, with small paper board birds that protrude partly from the sides, and which card can include a separate panel for containing a greeting that may be separated from the other panels in which the bird cage is contained as a punch out ornament. The combination provides an attractive three-dimensional ornament that can be used for hanging in appropriate places, as well as a remembrance type card.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: April 11, 1978
    Inventor: Michael P. Patterson
  • Patent number: 4080821
    Abstract: An electric circuit includes three matched resistance thermometer sensors and is responsive to changes in rate of heat loss from at least one of them. The sensors are connected in a series-parallel arrangement to form one arm of a bridge circuit. An amplifier detects imbalance in the bridge and controls current flowing in the bridge to restore balance. Twice as much current flows in one sensor than in the other two, so that the one is maintained hotter. Environmental changes effecting a change in the rate of heat loss from the one sensor are detected as a change in current flowing in the bridge.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: March 28, 1978
    Assignee: Rosemount Engineering Company Limited
    Inventor: James Stewart Johnston
  • Patent number: 4079573
    Abstract: Case sealer apparatus for sealing filled cases that have their top flaps extending vertically and that includes flight bars on endless chains for first moving the filled case over frusto conical rolls to slightly open the bottom major flaps and permit the package plate to enter between the major and minor bottom flaps. A guide plate and a flap tucker assembly are provided above the package plate to close the leading and trailing top minor flaps respectively as the case moves forwardly. Glue guns then apply adhesive to the upper minor and lower major flaps. Thereafter as the case moves along the slide plate, the major flaps move into contact with closure members to close the major flaps, and then the flight bars move the case through a compression roller assembly. The package plate includes a hingedly mounted entry portion that is resiliently retained in an entry position while the drive mechanism for the chains includes adjustable stop mechanism to discontinue the chain drive to provide overload protection.
    Type: Grant
    Filed: March 11, 1977
    Date of Patent: March 21, 1978
    Assignee: Bemis Company, Inc.
    Inventors: Ralph H. Livingston, Philip G. Rawlins
  • Patent number: 4077478
    Abstract: A down pressure control for use with furrow openers in grain drills which provides a spring load for maintaining down pressure on the furrow opener during normal operating conditions and which can be at relatively high rate to permit minimum tillage, or work in hard ground, but yet will release upon excessive movement of the furrow opener to prevent overstressing the hold down springs. The down pressure control is used in combination with an individual depth control for each of the furrow openers to insure that each furrow opener is individually controlled as to down pressure and depth.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: March 7, 1978
    Assignee: Haybuster Manufacturing, Inc.
    Inventor: Chester G. Neukom
  • Patent number: 4075698
    Abstract: This invention relates to analog-to-digital conversion systems, and makes use of the properties of cyclic variables such as phase angles. In one form of the invention, an analog signal to be converted into a digital value is applied to an input of a phase modulator. The phase modulator shifts the phase of an oscillator signal in accordance with the value of the analog input signal. A series of alternate frequency doubling and heterodyne frequency conversion steps are used to generate a series of signals with the same frequency as the oscillator output signal, but with phase shifts of 2, 4, 8, etc., times the phase shift of the phase modulator output signal. Binary (two-state) signals are generated whose values correspond to the relative phases of the phase modulator output and multiplied phase shift signals. The values of these binary signals are sampled when an analog-to-digital conversion is to be performed.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: February 21, 1978
    Inventor: Tenny D. Lode
  • Patent number: 4068723
    Abstract: A beam for supporting an earth working tool, such as a moldboard plow, which is made so that it will float vertically over obstacles that do not hook the earth working tool, and which also includes linkage that will trip to provide clearance over obstacles which cause a high resistance to floating. The unit utilizes tension springs placed to insure reliable operation, and yet which provide high holding forces for working conditions. Folding links are used to provide full tripping of the mechanism. The folding links are arranged in relation to the provided tension springs to keep spring expansion to a minimum during tripping and yet permit reliable tripping under high forces. The springs provide adequate pressure for resetting after clearing the obstacle.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: January 17, 1978
    Inventor: Sherman H. Quanbeck
  • Patent number: 4067393
    Abstract: A sod handling machine similar to fork lift truck which permits the handling of pallets of sod without loss of sod from the pallet, and further includes flotation tires arranged to permit the machine to be used for packing the sod after it has been laid. Thus the machine serves as a transport and as a packer.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: January 10, 1978
    Inventor: Raphael J. Szarkowski
  • Patent number: 4065884
    Abstract: An apparatus for collecting and causing evaporation of water that condenses on the interior surfaces of a window, to inhibit water damage to the window sill and lower portions of the frame. The apparatus includes a member comprising an outer housing that has apertures therethrough that is substantially filled with a foam or other absorbent material. The apparatus is applied to the window generally horizontally across the bottom portion, so that any water that runs down the surface of the window will collect on the device, and will evaporate.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: January 3, 1978
    Assignee: Novus Inc.
    Inventor: David A. Tenquist
  • Patent number: 4063453
    Abstract: A load frame used for testing purposes which includes means for reacting side loads between upper and lower cross heads of platens of a press or load frame.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: December 20, 1977
    Assignee: MTS Systems Corporation
    Inventor: Martin M. Gram
  • Patent number: 4062489
    Abstract: A heating system that includes a solar collector assembly exterior of a building that is fluidly connected by inlet and return conduits to separate chambers in a heat transfer tank located in the building, a heat pump furnace unit having an evaporation-condensor coil located in the heat transfer tank so that as the liquid flows in the tank from one chamber to the other it flows in heat transfer relationship to the coil, the heat pump furnace unit being located outside of the tank and being provided for supplying heat to the building heating system, and a plurality of vertically elongated ground heat exchangers extended into the earth and connected by conduits so that there is provided a liquid flow path from one of the tank chambers through the ground heat exchangers, and then back to the other chamber. Pumps are provided in the above conduits for pumping the liquid between the tank and the solar collector assembly, and the tank and the ground heat exchangers.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: December 13, 1977
    Inventor: Roland A. Henderson
  • Patent number: 4060175
    Abstract: A digester tank assembly for use in digester systems for anaerobic digestion of waste water sludge comprising a tank having a fixed exterior cover, and a diaphragm member mounted in the tank dividing the tank into upper and lower compartments, said diaphragm member being positioned above the normal sludge level and being movable relative to the sludge level to provide for regulation of gas pressure on the interior of the digestion tank and to allow for substantial variations in gas storage volume at generally uniform pressures. The diaphragm member is connected to a sliding stack that is guided with respect to the fixed cover so that the stack will be allowed to move with the diaphragm as the diaphragm position varies in accordance with the gas storage volume. The diaphragm carries a flowable ballast material that will shift as the diaphragm raises and lowers and which can be varied in volume to maintain the desired pressure on the inside of the digester tank.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: November 29, 1977
    Assignee: Fiberglass Specialty Co., Inc.
    Inventor: John R. Rysgaard, Sr.
  • Patent number: 4060072
    Abstract: Solar heating apparatus that includes a solar panel having a generally rectangular box type frame that is open at the front, glass panes mounted on the frame to close the front opening and provide a dead air space, a plurality of horizontally elongated, generally rectangular tubular channels mounted with the top wall of a lower channel in abutting relationship with the bottom wall of the next higher channel, a water inlet opening through one end of the uppermost channel, a water outlet opening through one end of the lowermost channel, conduits interconnecting the channels to provide a liquid flow path serially through the channels from the uppermost channel to the lowermost channel, a heat storage reservoir, lines including a pump for pumping liquid from a heat exchanger in the storage reservoir to the panel inlet and return the liquid from the outlet to the heat exchanger, control mechanism for operating the pump in response to temperature changes in the panel, and a heat transfer system for transferring hea
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: November 29, 1977
    Assignee: American Solar Energy Corporation
    Inventor: Donald F. Johnson
  • Patent number: 4058105
    Abstract: A safety switch system for use on snowmobiles that eliminates the hazards of previous systems by providing series connected normally closed switches, one connected directly into the throttle control lever which the operator must press for increasing engine speed from idle, and the other mounted directly on the carburetor and controlled by the throttle control arm which is directly connected to the butterfly valve of the carburetor. The two switches are connected to an engine kill system, such as a ground circuit for the ignition. One of the switches must be open for the engine to be running. This means that when the throttle is open (the carburetor control arm is away from idle position) and the operator's hand is off the throttle control lever the engine is dead. However, with the throttle arm in idle position the engine will run whether the operator has his hand on the manual throttle control lever or not.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: November 15, 1977
    Assignee: Scorpion, Inc.
    Inventors: Carl W. Schellin, John P. Lundberg