公开(公告)号：US3574496A

公开(公告)日：1971-04-13

申请号：US3574496D

申请日：1969-07-11

Applicant: HONEYWELL INC

Inventor： HEWITT WILLIAM LLOYD

IPC: F23N5/08 ,  F23N5/12 ,  F23N5/20

CPC classification number: F23N5/203 ,  F23N5/08 ,  F23N5/12 ,  F23N5/123 ,  F23N2023/26 ,  F23N2027/36 ,  F23N2029/00 ,  F23N2029/12 ,  F23N2029/14 ,  F23N2031/06

Abstract: A direct spark igniter combustion safeguard system having two flame sensors, a first of these being an ultraviolet responsive sensor positioned to observe the ignition spark and the resulting flame and connected in controlling relation to the gas valve, and the second sensor being of the flame rectification type for controlling igniter turnoff and also controlling a safety timer and lockout switch.

公开(公告)号：US3619097A

公开(公告)日：1971-11-09

申请号：US1495670

申请日：1970-02-27

Applicant: HONEYWELL INC

Inventor： CLAY HOMER B ,  HEWITT WILLIAM LLOYD

IPC: F23N5/12 ,  F23N5/20 ,  F23N5/10

CPC classification number: F23N5/123 ,  F23N5/12 ,  F23N5/20 ,  F23N5/203 ,  F23N2023/26 ,  F23N2027/36 ,  F23N2029/12 ,  F23N2031/12

Abstract: A burner control system adapted to be connected to a fuel burner wherein a safety timing circuit is used to assure ignition of the burner fuel and subsequent proper operation of the burner. The safety timer circuit utilizes a capacitive voltage divider network that initially is supplied with energy at start up of the system, and which is subsequently supplied with energy from a flame rectification sensor in order to assure the ignition and continued operation through an ignition control means and a silicon-controlled spark-generating circuit. The sensing of flame also causes the shutdown of the silicon controlled spark ignition portion of the system.