US3840001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air humidifying apparatus
Assignee: Individual
•
Filing: 1973-08-20
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Granted: 1974-10-08
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Expires: 1993-08-20
Abstract
Abstract An air humidifier arrangement for use with forced warm air furnaces, the arrangement having time delay circuitry electrically interconnected with the furnace blower to maintain operation of the blower for a limited time after the blower control switch is opened and the humidifier is shut off.
Inventors
- 👤 D Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F6/00; F24F6/12; F24F6/14; F24F2006/146
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An air humidifying apparatus for introducing moisture into the flow of air from a forced warm air furnace, said air flow being produced by an electrically operated blower associated with said furnace, the apparatus including: a source of voltage; a humidifier electrically interconnected with a blower control switch across said source; a delayed opening relay energizing means connected in series with said switch across the source; contact means operatively related to the relay energizing means and electrically interconnected with said blower across the source, whereby on closure of said switch the humidifier is actuated to introduce moisture into the air flow and the relay energizing means is supplied voltage from said source to actuate the contact means to thereby start the blower, and on opening of the switch the humidifier is shut off and, after a delay determined by said relay energizing means, the contact means is returned to its initial state to stop the blower.
Claim 2
Dependent Claim
156 words
An air humidifying apparatus for introducing moisture into the flow of air from a forced warm air furnace, said air flow being produced by an electrically operated blower associated with said furnace, the apparatus including: a source of voltage; a humidifier electrically interconnected with a blower control switch across said source; a delayed opening relay energizing means connected in series with said switch across the source; contact means operatively related to the relay energizing means and electrically interconnected with said blower across the source, whereby on closure of said switch the humidifier is actuated to introduce moisture into the air flow and the relay energizing means is supplied voltage from said source to actuate the contact means to thereby start the blower, and on opening of the switch the humidifier is shut off and, after a delay determined by said relay energizing means, the contact means is returned to its initial state to stop the blower.
Claim 3
Dependent Claim
27 words
An air humidifying apparatus as set forth in claim 1, further comprising a humidistat joined in the electrical interconnection of the humidifier and said blower control switch.
Claim 4
Dependent Claim
57 words
An air humidifying apparatus as set forth in claim 1, wherein said delayed opening relay energizing means comprises a thermal relay having associated contacts which on closure complete a circuit across said source through a winding of a power relay, said contact means electrically interconnected with the blower being actuated on energization of said power relay winding.
Claim 5
Dependent Claim
57 words
An air humidifying apparatus as set forth in claim 1, wherein said delayed opening relay energizing means comprises a full wave rectifier having a resistance-capacitance circuit and a winding of a power relay connected in parallel acroSs the rectifier output, said contact means electrically interconnected with the blower being actuated on energization of said power relay winding.
Claim 6
Dependent Claim
24 words
An air humidifying apparatus as set forth in claim 1, wherein said contact means is connected in series with said blower across the source.
Claim 7
Dependent Claim
17 words
An air humidifying apparatus as set forth in claim 5, wherein said contact means is normally open.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |