Patents by Inventor Paul Mettier

Paul Mettier 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).

  • Method and apparatus for welding current regulation for a resistance welding machine
    Patent number: 4745255
    Abstract: A method and arrangement are described for regulating the welding operation in a resistance welding machine by sensing the welding current and controlling the welding time. A first integrator (20) determines the desired total energy to be supplied to a welding spot from a desired welding current preset by means of a function generator (18) and a preset welding time. An integrating device (25) connected to the welding-current sensor (14) determines the actual energy supplied. A comparator (24) compares the desired total energy with the actual energy in order to switch off the welding current by means of a start/stop module (30) in the event of equality between desired value and actual value. In this manner, fluctuations in the supply voltage are compensated by lengthening or shortening the time during which energy is supplied to the welding spot in order to ensure the quality of the welding from one welding spot to another.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: May 17, 1988
    Assignee: Elpatronic AG
    Inventor: Paul Mettier