Xircom, Inc.

Pertron Controls Corporation

Monte A Pooley

Dirk I Gates

James K Matthews

David B Rosen

Gary A Jones

David C Bacon

Jerome Czerwinski

A multiplexor for use with a computer having a parallel port, for providing multiple separately addressable auxiliary parallel ports.

Parallel port multiplexor for PC parallel port

Parallel port multiplexor for use with a computer

Adapter for connecting an electronic computer to a local area network

A precision key pad controlled controller for a resistance welding machine is provided which may be set to deliver welding power to each of a multiplicity of welding operations on a precisely controlled repeatable basis. The controller incorporates circuitry for assuring that an accurately controlled amount of power is delivered for each welding operation by providing precise phase angle control despite variations in line voltage and line disturbances. The controller is constructed to incorporate selected numbers of steps to be performed automatically in sequence by the controlled welding machine in carrying out a particular welding operation. The duration of each step of the welding machine, the amount of welding power to be delivered, and other parameters are set for each particular welding operation by the key pad, and displayed on an associated alphanumeric display.

Microprocessor-controlled controller for resistance welding machines

Growing community of inventors

Newbury Park, CA, United States of America

Monte A Pooley