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1. (WO2001038789) STEPPER MOTOR DRIVING A LINEAR ACTUATOR OPERATING A PRESSURE CONTROL REGULATOR

Pub. No.:    WO/2001/038789    International Application No.:    PCT/US2000/031200
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Wed Nov 15 00:59:59 CET 2000
IPC: F23N 1/00
F23N 5/10
Applicants: HONEYWELL INC.
Inventors: KEMP, Stephen, J.
Title: STEPPER MOTOR DRIVING A LINEAR ACTUATOR OPERATING A PRESSURE CONTROL REGULATOR
Abstract:
An apparatus for and method for controlling the gas supply of a gas appliance. The gas appliance has a main burner with a main valve controlled by a linear actuator. A stepper motor positions the linear actuator under control of a microprocessor. The stepper motor and microprocessor are powered from a thermopile having its output converted to the appropriate voltages by a DC-to-DC converter. Changes in valve position permit changes of fuel type and flame intensity.