Patents Represented by Attorney Oliver E. Todd
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Patent number: 4206164Abstract: A pipe insulation is made between an inner and outer mold core from a liquid which foams and then forms a solid. The foaming action may cause movement in the inner mold which is detected and then adjusted accordingly to maintain concentricity between the inner and the outer wall of the pipe insulation. The insulation may be used alternatively as pipe.Type: GrantFiled: October 25, 1978Date of Patent: June 3, 1980Assignee: Owens-Corning Fiberglas CorporationInventor: Sheldon A. Canfield
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Patent number: 4206415Abstract: An audio signal amplitude detector for applying stereo audio signals above a predetermined amplitude to at least one pair of speakers. The audio signal for each channel is amplified and compared with two reference voltages. When the amplified audio signal is below a lower one of the reference voltages, the signal is blocked to the connected speaker amplifier. As the amplitude of the audio signal increases between the first and second reference voltages, an increasing portion of the audio signal is applied to the connected speaker amplifier until a maximum signal is applied when the amplitude is above the second reference voltage.Type: GrantFiled: July 31, 1978Date of Patent: June 3, 1980Assignee: Eprad IncorporatedInventors: Angelo Boudouris, Edwin F. Peters
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Patent number: 4204447Abstract: An apparatus for perforating the minor diameter or inner corrugation of a transversely corrugated thermoplastic drainage pipe. A plurality of perforations are simultaneously formed in the inner corrugations of the pipe by reciprocally moving heated punches radially into the pipe, removing the punches and then translating the pipe to another position for the next punching step. In an alternative embodiment, the punches are carried by a rotating ring which positions them opposite an inner corrugation and a cam device drives the punch radially into the pipe.Type: GrantFiled: December 16, 1977Date of Patent: May 27, 1980Inventor: David W. Slaughterbeck
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Patent number: 4202094Abstract: A grass cutting attachment for an electrically powered handyman's drill is disclosed. A length of flexible filament extends radially from a body rotatable by the drill. The rotating filament end is able to cut both edges of lawn and expanses of lawn. A handle attachment which prevents stooping and bending by an operator is also disclosed.Type: GrantFiled: June 28, 1978Date of Patent: May 13, 1980Inventor: Irene Kalmar
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Patent number: 4200165Abstract: The present invention relates to an improved independent suspension system for vehicle wheels which may be used either for driven or non-driven wheels including dirigible wheels of a vehicle having front wheel drive. One of the independently suspended driven wheels is mounted on an end of a transversely extending stamped metal suspension arm pivoted about the other end for movement relative to a point on the vehicle chassis. The other driven wheel is mounted on a second transversely extending stamped metal suspension arm which also is pivoted for movement relative to a point on the vehicle chassis. The second arm mounts a differential which is connected through axle shafts to drive the wheels.Type: GrantFiled: October 16, 1978Date of Patent: April 29, 1980Assignee: Dana CorporationInventors: Miles A. Bowman, Jr., Jack A. Schaeffer
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Patent number: 4193710Abstract: The present invention is a self-transportable truck mounted roller for paving or repairing paved roads. The invention comprises a lightweight roller and roller assembly mounted to the front end of a truck, and includes hydraulic cylinders or other means for raising and lowering the roller. In operation, the roller is lowered enough to displace the weight of the truck from the front wheels onto the roller, thereby providing a highly compressive paving force.Type: GrantFiled: June 22, 1978Date of Patent: March 18, 1980Inventor: Anthony Pietrowski
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Patent number: 4186493Abstract: A straight edge comprising a plurality of longitudinal members that are positioned together in slidably telescoping relationship. At least one longitudinal edge of the members forms a substantially straight edge throughout the telescoping range of the longitudinal members. The extended members preferrably are marked with graduations along the straight edge.Type: GrantFiled: August 16, 1978Date of Patent: February 5, 1980Inventors: Amir U. Khan, Habib U. Khan, Ahamed A. Amid
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Patent number: 4179781Abstract: An improved method for forming a heat exchanger core from a single elongated sheet of metal which is stamped to define longitudinally spaced corrugated sections and then is pleat folded between the stamped sections to define first and second groups of alternating fluid passages for indirect heat transfer between two fluids. During stamping of each corrugated section, edges of such section are clamped in place to define precise exterior dimensions and the corrugations are formed by stretching the metal to conform with a die. The stamped corrugations are shaped with triangular end reinforcements to control the location of the bends as the sheet is folded into the final shape of the core. Edges of the sections defining each passage in the first group are sealed together to prevent the fluids from leaking around such edges.Type: GrantFiled: September 16, 1977Date of Patent: December 25, 1979Assignee: Karen L. BeckmannInventor: Wesley A. Long
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Patent number: 4176401Abstract: An interface for use in serial digital data systems incorporates photo-coupling devices. The interface comprises three photo-couplers in the input and output circuits of a data station. Light emitting elements of two photo-couplers are connected in series with the driven element of a third coupler across a reference power supply. The driven element of the third coupler is connected to the output of one data station and also is shunted by the output from a preceding station. Either output causes a current flow to produce light outputs from the two light emitting elements. The light, in turn, operates the driven elements of the other two couplers. The driven element of one of the two couplers supplies data to the one data station, the driven element of the other coupler retransmits data to the next station. The interface is adaptable for use in a closed loop data system by adding a fourth photo-coupler.Type: GrantFiled: March 1, 1978Date of Patent: November 27, 1979Assignee: Owens-Corning Fiberglas CorporationInventor: John W. Lonberger
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Patent number: 4169566Abstract: An improved film supply and take-up transport for use with a motion picture projector. At least two horizontal film platters are connected through bearing plates to a single vertical drive shaft. A circular film winding core is selectively positioned concentric with the shaft on one platter. The core engages a mechanism for locking the platter through the bearing plate to the drive shaft for operating the platter in a take-up mode. A motor is controlled to rotate the drive shaft for winding the film onto the core at the same rate that the film is advanced through the projector. Film is supplied to the projector from the center of a film coil on another platter which is coupled through its bearing plate to the drive shaft. An auxiliary motor is intermittently operated to initially accelerate the supply platter when the projector is first started and to control the supply platter speed to maintain a desired film supply rate.Type: GrantFiled: February 22, 1977Date of Patent: October 2, 1979Assignee: Eprad IncorporatedInventors: Angelo Boudouris, William D. Petty, Clarence S. Simonds
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Patent number: 4147526Abstract: An improved microcomputer controlled winder for attenuating a plurality of streams of molten glass issuing from a bushing into fibers and for collecting a strand of such attenuated fibers into a package. A constant speed motor drives a winder collet through an electromagnetically actuated clutch. The microcomputer controls the phase angle firing of an SCR circuit which drives the clutch to in turn control the winder collet speed.Type: GrantFiled: December 30, 1977Date of Patent: April 3, 1979Assignee: Owens-Corning Fiberglas CorporationInventor: John W. Lonberger
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Patent number: 4146376Abstract: An improved microcomputer controlled winder for attenuating a plurality of streams of molten glass issuing from a bushing into fibers and for collecting a strand of such attenuated fibers into a package. The microcomputer controls the winder speed in accordance with error between programmed data and a winder collet speed signal from a tachometer. The tachometer signal is modified to compensate for temperature variations in the bushing when a package is started after the bushing has been shut down for a period of time.Type: GrantFiled: December 30, 1977Date of Patent: March 27, 1979Assignee: Owens-Corning Fiberglas CorporationInventors: John T. Beckman, John W. Lonberger
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Patent number: 4146287Abstract: An improved relocatable wiring system for supplying lighting and power to a floor area in a building is disclosed. A plurality of lighting fixtures installed in a ceiling structure for lighting the floor area are connected in one or more branch circuits. Each branch circuit is defined by a plurality of plural conductor branch circuit cables which distribute power to the fixtures. Connectors are permanently attached to the opposite ends of each branch circuit cable. A connector at one end of a cable is joined to a connector on the next cable in the branch circuit by a circuit connector module having two receptacles keyed to receive and interconnect the two connectors. The circuit connector module also has a connector which mates with a receptacle permanently attached to a lighting fixture, which connector is in turn connected to a lighting circuit in the fixture.Type: GrantFiled: October 7, 1977Date of Patent: March 27, 1979Assignee: National Service Industries, Inc.Inventor: Nils G. Jonsson
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Patent number: 4142755Abstract: A truck tractor and trailer combination is disclosed having air deflector shields extending from the cab to the trailer and a drag reducer shield enclosing the rear end of the trailer whereby air drag against the truck tractor and trailer is substantially reduced.Type: GrantFiled: August 12, 1977Date of Patent: March 6, 1979Inventor: Edgar L. Keedy
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Patent number: 4132883Abstract: An improved electric steam vaporizer having a container defining a liquid reservoir and a removable cover for the container. Two parallel electrodes depend into the liquid reservoir from a cap attached to the cover. The electrodes are attached to the cap by inserting into electrode-receiving openings formed in the cap, welding the conductor ends on a line cord to tabs which project through the cap, bending the tab to mechanically lock the electrodes to the cap and in one embodiment potting the tabs and line cord conductor ends with a sealing material. An electrode housing attached to the cap surrounds the electrodes to define an inner-boiling chamber, an outer water-filled insulating chamber, and a small volume annular surge chamber which surrounds the lower end of the boiling chamber.Type: GrantFiled: June 14, 1976Date of Patent: January 2, 1979Assignee: Champion Spark Plug CompanyInventor: Thomas E. Grime
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Patent number: 4132042Abstract: An improved door structure and the method for forming such structure is disclosed. Individual rectangular door panels are formed from glass fiber reinforced plastic with a lip along at least one exterior edge for abutting a surface against which the door panel seals when the door is closed. A seal is attached to the door panel adjacent the lip for resiliently engaging the abutting surface. Internal wood and prestressed steel reinforcement strips extend along at least the long sides of the door panels to prevent the door panels from twisting or sagging. The interior of the door panel is reinforced with a honeycomb formed from a resin impregnated corrugated cardboard. Voids in the honeycomb may be filled with solid or particulate insulation.Type: GrantFiled: January 13, 1978Date of Patent: January 2, 1979Inventor: Vincent Di Maio
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Patent number: 4131159Abstract: An improved heat exchanger is constructed with a core formed from a single elongated sheet of metal which is stamped to define longitudinally spaced corrugated sections and then is pleat folded between the stamped sections to define first and second groups of alternating fluid passages for indirect heat transfer between two fluids. During stamping of each corrugated section, edges of such section are clamped in place to define precise exterior dimensions and the corrugations are formed by stretching the metal to conform with a die. The stamped corrugations are shaped with triangular end reinforcements to control the location of the bends as the sheet is folded into the final shape of the core. Edges of the sections defining each passage in the first group are sealed together to prevent the fluids from leaking around such edges.Type: GrantFiled: July 26, 1976Date of Patent: December 26, 1978Assignee: Karen L. BeckmannInventor: Wesley A. Long
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Patent number: 4119380Abstract: A method for optically determining the stress-optical constants of optically isotropic and anisotropic materials. A collimated beam of monochromatic light is directed at the tip of a crack in a thin plate specimen under plane-stress from a direction substantially perpendicular to the surface of the specimen and to the direction of the stress. Reflected and transmitted stress-optical constants are determined from a ratio of the diameters of transmitted and reflected caustics from the specimen and the known Poisson's ratio and modulus of elasticity for the specimen.Type: GrantFiled: January 21, 1977Date of Patent: October 10, 1978Assignee: The University of ToledoInventors: Demetrios D. Raftopoulos, Stamatios V. Kartalopoulos
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Patent number: 4113809Abstract: An improved ultrasonic nebulizer for administering a medicament aerosol to a patient. Output from an oscillator is connected through a series inductor to a transducer adjacent a reservoir which generates aerosol from the medicament. The inductor is tuned for series resonance with the bulk capacitance of the transducer. An impedance change in the transducer when liquid is removed or consumed from the reservoir reduces the power delivered to the transducer and prevents transducer damage.Type: GrantFiled: April 4, 1977Date of Patent: September 12, 1978Assignee: Champion Spark Plug CompanyInventors: Raymond L. Abair, Stanley J. Kulish, Jr.
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Patent number: D254960Type: GrantFiled: December 29, 1977Date of Patent: May 13, 1980Assignee: Kent-Moore Instrument CompanyInventor: Patrick J. Helm