Paul B. Patton

Microcomputer-controlled system with redundant checking of sensor outputs

Method and apparatus for testing signal quality in a burner control system

Dynamic self-checking safety circuit means

Method and apparatus for monitoring and calibrating damper position

System for redundantly processing a flame amplifier output signal

Gated multi-drop communication system

Display apparatus for a first out type of fault status annunciator having a series of interlock switches

Manual damper motor control

Flame safeguard sequencer having safe start check

Control logic safety monitoring circuit means