Patents by Inventor Robert M. Thomas

Robert M. Thomas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5284400
    Abstract: A fastening arrangement for attaching a handgrip knob assembly to a vehicle gearshift lever rod. The knob has a through cavity comprising an upper cavity portion, an intermediate cavity portion supporting a metal insert, and a lower upwardly tapered cavity portion. The insert upper surface defining a bottom wall clamping surface of the upper cavity portion bottom wall. An internally threaded insert through bore is divided from a lower counterbored portion by an internal stop shoulder. The shift lever rod has an upper threaded stem connected by a cylindrical shank portion to an upwardly tapered rod section while the stem portion terminates in a frustoconical pilot end. A rod external stop shoulder divides the stem and shank sections. A spring steel drive washer, having a central aperture intermeshed with an upper crown portion of a locknut, is initially press-fitted in the upper cavity until its outer edge frictionally engages a serrated portion of the upper cavity.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: February 8, 1994
    Assignee: Chrysler Corporation
    Inventor: Robert M. Thomas
  • Patent number: 5034221
    Abstract: A topical agent and method for the treatment and prevention of pseudofolliculitis barbae, commonly known as "razor bumps", is effected by the topical application to beard areas of the face of a combination of acetylsalicylic acid, corn starch, isopropyl alcohol, and aloe vera.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: July 23, 1991
    Inventors: Steven E. Rosen, Robert M. Thomas
  • Patent number: 4996444
    Abstract: A clock recovery circuit includes a resonant circuit which is driven into oscillation at a clock frequency by binary 1 pulses in a data signal supplied thereto, a clock signal being derived from the resonant circuit via a buffer and a limiting amplifier. The resonant circuit has a high Q to accommodate long sequences of binary Os during which it is not driven. In order to prevent over-driving when the data signal has a high density of binary 1s, a level detector detects when the oscillation amplitude exceeds a threshold level, whereupon a flip-flop is set to control a gate to inhibit driving of the resonant circuit until its oscillation amplitude has decayed. The flip-flop is clocked by the data signal to operate in synchronism with the incoming data, and may be followed by a second similarly clocked flip-flop to avoid potential errors.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: February 26, 1991
    Assignee: Northern Telecom Limited
    Inventors: Robert M. Thomas, Joseph P. R. M. Pigeon
  • Patent number: 4887331
    Abstract: A pivot bushing comprises a tubular body defining a bore adapted to receive a pivot pin and includes a radially enlarged peripheral flange and at least one resilient finger extending radially outwardly from one end of the body and facing toward the peripheral flange. The free end of each finger is axially spaced from the annular surface of the peripheral flange so as to receive an apertured support panel therebetween. The tubular body also includes a radially expanded shoulder adjacent the peripheral flange and having a periphery formed with a cone surface dimensioned to matingly engage with the aperture in the support panel in a self-centering manner. The components are unitarily formed from a siingle bearing body.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: December 19, 1989
    Assignee: Chrysler Motors Corporation
    Inventor: Robert M. Thomas
  • Patent number: 4790206
    Abstract: A lost motion link for allowing selective control of the throttle valve of a vehicle engine between accelerator pedal linkage and speed control system linkage comprises:an elongated body having an enclosed longitudinal passage dimensioned to receive an enlarged cable terminus, an integral flange for pivotally mounting the body to the throttle valve actuator, and a restricted portion of the longitudinal passage entraining the terminus in the body.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: December 13, 1988
    Assignee: American Motors Corporation
    Inventor: Robert M. Thomas
  • Patent number: 4785686
    Abstract: A cable mount comprises a tubular body having a radially enlarged flange and retaining fingers axially spaced from and inclined toward the enlarged flange adapted to retain the mount within an apertured panel. The cable mount also includes an axial extension including one part of a two-piece ball and socket connection. A second piece of the ball and socket connection is provided on a cable accessory such as a tubular sheath which can therefore be swivelly mounted with respect to the cable mount. Another cable accessory comprises a barrier cap which covers the opening in the apertured panel and a registering opening in any trim material covering the panel. In addition, an integral cable assembly according to the present invention includes a pair of cable mounts and any mating cable accessories such as sheaths or barrier caps, and these components are entrained between the ends of the cable by an enlarged terminus at each end of the cable.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: November 22, 1988
    Assignee: American Motors Corporation
    Inventor: Robert M. Thomas
  • Patent number: 4320360
    Abstract: The phase of a voltage controlled oscillator (VCO) can be controlled and changed by a series of pulses applied through an isolating element such as a capacitor. A small amount of current injected into the reactive element distorts the waveform of the VCO during the period of injection. Depending on the power of the pulse of injected current, a corresponding phase shift in the output of the VCO will result during the period of injection. The pulses are applied at a frequency equivalent to the desired frequency. Assuming the waveform of the VCO to be sinusoidal or otherwise symmetrical, the injected current pulses result in one point on the waveform where the distortion will be symmetrical and stable. The injection of repeated pulses results in this stable point eventually occurring symmetrically about the peak of the VCO waveform thereby locking the phase of the VCO to correspond to the frequency of the injected pulses.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: March 16, 1982
    Assignee: Hazeltine Corporation
    Inventor: Robert M. Thomas
  • Patent number: 4085294
    Abstract: A control point driver circuit for use in a telephone exchange for energizing and deenergizing a control element such as a control relay in response to set and reset input pulses. The control point driver circuit comprises a transformer having a centertapped primary forming set, reset, and common inputs for receiving the set and reset input pulses and a secondary coupled to a constant control voltage. The control point driver circuit also includes a comparator having a first input coupled to the transformer secondary, an output coupled to the control relay to be energized and de-energized and a second input coupled to the comparator output for receiving first and second reference voltages which are related in magnitude to the constant control voltage to maintain the comparator in the set state or reset state indefinitely until a reset or set input pulse is received.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: April 18, 1978
    Assignee: GTE Automatic Electric (Canada) Ltd.
    Inventors: Robert M. Thomas, John A. Gauthier
  • Patent number: 4077586
    Abstract: This specification discloses simplified wire payout apparatus for paying out wire directly from a box in which the wire is shipped, thus eliminating the necessity of providing mechanical payout equipment such as has been required on utility service trucks. For light-weight and low cost, a corrugated paperboard carton is used as a shipping container; and provision is made for paying out the wire without removing a spool, on which the wire is wound, from the box. The spool is preferably also made of corrugated paperboard.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: March 7, 1978
    Assignee: General Cable Corporation
    Inventors: Robert M. Thomas, John R. Reiser
  • Patent number: 4041327
    Abstract: The disclosure relates to a sense point circuit for sensing the active or inactive condition of an electrical path as represented by the conduction or nonconduction of a solid state device in response to an interrogating signal pulse. The sense point circuit comprises an input for receiving the interrogating signal pulses, a solid state switch such as a transistor, and a transformer having a primary coupled across the base and emitter of the transistor and a secondary coupled across the solid state device and an output coupled to the emitter of the transistor. The sense point circuit additionally includes a first resistor coupled between the input and the common junction of the base of the transistor and the transformer primary, and a second resistor coupled between the input of the sense point circuit and the collector of the transistor.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: August 9, 1977
    Assignee: GTE Automatic Electric (Canada) Ltd.
    Inventor: Robert M. Thomas
  • Patent number: 4011410
    Abstract: Communication system interface circuits for bidirectional transmission of signals between terminal sets, each interface circuit comprising a transformer including first winding means coupled through rectifier means and a low-pass filter to a first terminal set and including second winding means having end terminals coupled through diodes to the output of a high frequency inverter and having a center tap coupled through an inductance impedance to a neutral circuit point, a second terminal set being coupled across the inductive impedance. The first terminal set may be connected to a telephone subset with ringing and bias signals being applied in circuit with the inductive impedance. The indictive impedance includes transistor means controlled by an operational amplifier which is controlled from a resistance-capacitance phase-shift means, the impedance being equivalent to that of an inductance and a series resistance.
    Type: Grant
    Filed: November 13, 1973
    Date of Patent: March 8, 1977
    Inventor: Robert M. Thomas
  • Patent number: 3970805
    Abstract: An active hybrid circuit for providing isolation between a signal receiving line and a signal transmitting line coupled to a two-wire telephone subset. The receiving line is coupled to a receiving amplifier having a differential output coupled to a pair of common terminals. The telephone subset is also connected to the two common terminals. The two common terminals are connected to the two inputs of a transmitting operational amplifier. The transmitting signal line is coupled to the output of the transmitting amplifier. A compensating network is connected between the input to the receiving amplifier and one of the inputs to the transmitting amplifier.
    Type: Grant
    Filed: February 22, 1974
    Date of Patent: July 20, 1976
    Assignee: GTE Automatic Electric (Canada) Limited
    Inventor: Robert M. Thomas
  • Patent number: 3965447
    Abstract: Communication system interface circuits for bi-directional transmission of signals between terminal sets, each interface circuit comprising a transformer including first winding means coupled through rectifier means and a low-pass filter to a first terminal set and including second winding means having end terminals coupled through diodes to the output of a high frequency inverter and having a center tap coupled through an inductive impedance to a neutral circuit point, a second terminal set being coupled across the inductive impedance. The first terminal set may be connected to a telephone subset with ringing and bias signals being applied in circuit with the inductive impedance. The inductive impedance includes transistor means controlled by an operational amplifier which is controlled from a resistance-capacitance phase-shift means, the impedance being equivalent to that of an inductance and a series resistance.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: June 22, 1976
    Assignee: GTE Automatic Electric Laboratories Incorporated
    Inventor: Robert M. Thomas
  • Patent number: 3931274
    Abstract: The compounds bis(2,3-dibromopropyl carbonate) of tetrabromobisphenol A and bis(2,3-dibromopropyl carbonate) of tetrachlorobisphenol A are effective fire retardants and impart enhanced fire-retardant properties to normally-combustible polymers by incorporation therein of a fire-retardant amount of one of said compounds or a mixture thereof. The fire retardancy of such polymer composition is further enhanced by incorporation therein of an additional flame-retardant material, e.g., an arsenic, antimony, or bismuth compound, preferably antimony oxide. Such polymer compositions of enhanced fire-retardancy incorporating a compound of the invention.
    Type: Grant
    Filed: March 27, 1973
    Date of Patent: January 6, 1976
    Assignee: Great Lakes Chemical Corporation
    Inventors: Robert M. Thomas, Rastko I. Mamuzic
  • Patent number: D260661
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: September 8, 1981
    Inventors: Robert M. Thomas, Robert E. Thomas
  • Patent number: D261284
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: October 13, 1981
    Inventors: Robert M. Thomas, Robert E. Thomas