Patents by Inventor Thomas Clifford

Thomas Clifford 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).

  • Emergency alarm method and system utilizing cross cueing and ranging techniques
    Patent number: 4746912
    Abstract: An alarm signalling method and system utilizing cross cueing between radio, audio and visible alarm signals which are emitted by an alarm signalling unit. A method and system for measuring the range between the alarm signalling unit and a receiver carried by a rescuer wherein the differences in the time of receipt at the receiver of simultaneously emitted radio and audio signals is used as a measure of range.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: May 24, 1988
    Inventors: Thomas Clifford, Carl E. Schwab, Bernard L. Jansen
  • Method of regenerating a lead monoxide target layer of a camera tube
    Patent number: 4090758
    Abstract: The method comprises the steps of providing a camera tube having an evacuated envelope, a photoconductive layer primarily of lead monoxide, an activated getter and an unactivated getter within the envelope. After a period of operation or storage the tube exhibits a deterioration in spectral photosensitivity of the layer. The characteristic ratio of blue light photosensitivity is measured and when the ratio is less than about 80% the unactivated getter is activated to regenerate the tube.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: May 23, 1978
    Assignee: RCA Corporation
    Inventors: Chih Chun Wang, Thomas Clifford Lausman, Ronald Frank Bates
  • Perforating apparatus for articles
    Patent number: 4061148
    Abstract: A cigar perforator comprises opposing sets of perforating needles which reciprocate at right angles to the cigar to perforate and withdraw from it. The cigar is held during perforation between apertured plates, each aperture having a stripper plate mounted therein which supports the cigar while the perforating needles are withdrawn.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: December 6, 1977
    Assignee: Imperial Group Limited
    Inventors: John Keith Goslin, Thomas Clifford Tomlinson
  • Scale reducer for zinc phosphating solutions
    Patent number: 4057440
    Abstract: The hard rock-like scale formed on zinc phosphating equipment is rendered soft and dispersible by adding a scale-reducing amount of dialkyl triamine pentakis methylene phosphonic acid or its alkaline salt in the zinc phosphating solution.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: November 8, 1977
    Assignee: Pennwalt Corporation
    Inventors: Thomas Clifford Atkiss, William Elgin Keen, Jr.
  • Preparation of unsaturated polyester compositions
    Patent number: 4016131
    Abstract: Admixture of unsaturated polyester and finely ground powder particles of soda-containing silicate glass, preferably soda-lime-silicate glass, e.g. below about 40 mesh and in an amount of between about 1 to 60% based on the weight of the polyester-glass particle admixture, providing improved properties in the ultimately cured resin at lower material costs and having special application as a composition for use in fabricating fibrous glass (i.e. fiber-glass) reinforced plastics composite products.
    Type: Grant
    Filed: April 4, 1975
    Date of Patent: April 5, 1977
    Assignee: Vitrofil Corporation
    Inventors: Thomas Clifford Shutt, L. Wayne Snider
  • Photosensitive camera tube target primarily of lead monoxide
    Patent number: 4001099
    Abstract: A photosensitive layer comprising primarily lead monoxide is deposited on a signal electrode of a vidicon camera tube target. The deposition is carried out in an atmosphere containing oxygen and deuterium oxide. The vidicon target formed exhibits improved transient response leg properties and hole transport characteristics.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: January 4, 1977
    Assignee: RCA Corporation
    Inventors: Chih Chun Wang, Thomas Clifford Lausman, Ronald Frank Bates
  • Fired construction shapes and process and binder therefor
    Patent number: 3963506
    Abstract: Structural clay products such as bricks, tile and blocks are made using waste soda lime glass, other inorganic materials and ball clay. The products are produced at the relatively low firing temperatures between 1300.degree. and 1900.degree.F and are of minimum porosity.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: June 15, 1976
    Assignee: Glass Container Manufacturers Institute, Inc.
    Inventors: Thomas Clifford Shutt, Howard Campbell