Patents by Inventor Paul Chalfont Fryer

Paul Chalfont Fryer 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).

  • High temperature tooling
    Publication number: 20030173339
    Abstract: A thermal tool (100) for high temperature work such as plasma welding or cutting has a replaceable nozzle (102) coupled to an elongate support (106) via interengaging threaded portions (108, 110) on each. The threaded portions are tapered and good heat conduction is provided from the nozzle to the elongate support, giving the nozzle a longer life. The nozzle can be readily removed and changed. A fluid-cooling channel (120) is enclosed in the second part adjacent the interengaging threads, which may be buttresstype threads.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 18, 2003
    Inventors: Paul Chalfont Fryer, Richard Paul Fryer, Jeremy Edward Fryer
  • Electrical overload switching relay
    Patent number: 4096465
    Abstract: An overload switching relay for a multi-phase electricity supply responds to the value of the currents in the individual phases and actuates a contact-breaking switch in the event of either (i) the mean value of the currents on all phases exceeding a first threshold, and (ii) any differential arising, above a second threshold, between the currents of any two phases: means are provided to increase the threshold to differential actuation as the mean value of the entire plurality of currents increases.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: June 20, 1978
    Assignee: Cutler-Hammer, Inc.
    Inventor: Paul Chalfont Fryer