US3776214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination heating and humidifying system
Assignee: LEWBILL IND Inc
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Filing: 1971-11-16
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Granted: 1973-12-04
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Expires: 1991-11-16
Abstract
Abstract A normally shut off, electrically operated, spray humidifier is provided for humidifying a flow of air produced by a furnace blower controlled by a heat-responsive switch that is independent of the thermostat circuit which controls the furnace burner. The humidifier is connected in the thermostat circuit through a normally open switch that is closed only when a sail, operatively connected with the switch, is moved by the flow of air produced by the blower. Consequently, the humidifier does not start to operate until the flow of air begins, but the humidifier is shut off when the burner is turned off.
Inventors
- 👤 J Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:37
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F6/00; F24F6/12; F24F6/14; F24F2006/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
The combination with a heating system having an electrically operated furnace burner for heating air, a thermostat circuit connected to the burner for turning it on and off, an electrically operated blower, and a heat-responsive switch adjacent the burner electrically connected with the blower for turning it on and off idependently of the thermostat circuit to produce a flow of air; of a humidifying system comprising a normally shut off electrically operated spray humidifier for humidifying said flow of air, an electric circuit for the humidifier deriving electric current from only the thermostat circuit for operating the humidifier, said humidifier circuit including a normally open switch, and a sail actuated by said flow of air for closing said last-mentioned switch to turn on the humidifier after the blower starts, whereby the humidifier starts to operate when said flow of air starts and stops when the burner is turned off.
Claim 2
Dependent Claim
149 words
The combination with a heating system having an electrically operated furnace burner for heating air, a thermostat circuit connected to the burner for turning it on and off, an electrically operated blower, and a heat-responsive switch adjacent the burner electrically connected with the blower for turning it on and off idependently of the thermostat circuit to produce a flow of air; of a humidifying system comprising a normally shut off electrically operated spray humidifier for humidifying said flow of air, an electric circuit for the humidifier deriving electric current from only the thermostat circuit for operating the humidifier, said humidifier circuit including a normally open switch, and a sail actuated by said flow of air for closing said last-mentioned switch to turn on the humidifier after the blower starts, whereby the humidifier starts to operate when said flow of air starts and stops when the burner is turned off.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |