Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent
1993-12-10
1995-01-03
Tanner, Harry B.
Automatic temperature and humidity regulation
Hot-air furnace
Air and fire control
236 46E, F23N 520
Patent
active
053779096
ABSTRACT:
A control system to control the operation of a furnace (10) having a fuel control unit (26) to supply fuel to a burner (24) includes a limit switch (48) within furnace (10) to detect an overheated condition. The limit switch (48) opens when a reference temperature is reached, shutting down the furnace (10). A logic unit (40) senses the state of the limit switch (48) and measures the shutdown period, and notes whether the shutdown period exceeds a predetermined interval. The logic unit (40) opens a lockout switch (38') that controls the fuel control unit (26) if the furnace is subject to a number of consecutive prolonged shutdowns that exceeds a predetermined limit.
REFERENCES:
patent: 3549088 (1970-12-01), Obenhaus
patent: 3921899 (1975-11-01), Hamilton
patent: 4140274 (1979-02-01), Nabinger
patent: 4408711 (1983-10-01), Levine
patent: 4502625 (1985-03-01), Mueller
patent: 4638942 (1987-01-01), Ballard
patent: 4667874 (1987-05-01), Johnson et al.
patent: 4792089 (1988-12-01), Ballard
patent: 4815524 (1989-03-01), Dempsey et al.
patent: 4887767 (1989-12-01), Thompson et al.
patent: 4951870 (1990-08-01), Ballard
patent: 5197664 (1993-03-01), Lynch
Consolidated Industries Corp.
Libert Victor E.
Spaeth Frederick A.
Tanner Harry B.
LandOfFree
Limit switch control especially for warm air furnaces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Limit switch control especially for warm air furnaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limit switch control especially for warm air furnaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2205893