James I. Bartels

Full duplex communication system with power transfer on one pair of conductors

Microcomputer-controlled system with redundant checking of sensor outputs

Automatic firing rate control mode means for a boiler

Control system apparatus and method using a controlled device for manual data entry

Apparatus and method for monitoring the operating condition of a burner system

Firing rate control system for a fuel burner

Method and apparatus for monitoring and calibrating damper position

Adaptive low fire hold control system

Control system apparatus for loading a value of a system parameter and preventing change thereto after a period of time

Failsafe monitoring system for potentiometers