US3829010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat for power ventilators and the like
Assignee: WIND WONDER Inc
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Filing: 1972-12-14
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Granted: 1974-08-13
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Expires: 1992-12-14
Abstract
Abstract A thermostat for use with a power ventilator which responds to attic or inside temperatures to actuate a motor turning a power ventilator, said thermostat incorporating a first means which is responsive to ambient temperature of the air causing the apparatus to turn on and a second means responsive to temperature of the ambient air in case of fire or overheating which turns the apparatus off. The circuitry connects directly with conventional AC power lines and includes a pair of separate isolated circuit legs, one of which is temperature responsive in the manner described above so that signals are formed therein and the other leg of the circuit including switching means, switching the current off and on for a motor for such a power ventilator.
Inventors
- 👤 J Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:57
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1927; G05D23/1928
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
A thermostat for use in a power ventilator which responds to ambient air temperature wherein the ventilator includes a fan which is rotated by an electric motor, said thermostat comprising: a power connection across such a motor to provide electrical power thereto; switch means having a control terminal and in series with said motor and operable to control current flow through such a motor; temperature sensitive means exposed to the temperature of the ambient air in the near vicinity, said means responding to temperature increase above a predetermined level to attain an altered condition such that an output signal is formed by a signal forming means and applied to the terminal of said switch means to turn said motor on; and, said means further being responsive to increase of ambient air temperature above a second predetermined level which causes the formation of a signal turning said switch means off.
Claim 2
Dependent Claim
149 words
A thermostat for use in a power ventilator which responds to ambient air temperature wherein the ventilator includes a fan which is rotated by an electric motor, said thermostat comprising: a power connection across such a motor to provide electrical power thereto; switch means having a control terminal and in series with said motor and operable to control current flow through such a motor; temperature sensitive means exposed to the temperature of the ambient air in the near vicinity, said means responding to temperature increase above a predetermined level to attain an altered condition such that an output signal is formed by a signal forming means and applied to the terminal of said switch means to turn said motor on; and, said means further being responsive to increase of ambient air temperature above a second predetermined level which causes the formation of a signal turning said switch means off.
Claim 3
Dependent Claim
28 words
The circuit of claim 1 wherein said temperature responsive means includes a circuit component having a positive temperature coefficient which alters operation thereof above the second predetermined temperature.
Claim 4
Dependent Claim
32 words
The circuit of claim 1 wherein said temperature responsive means includes a circuit component having a negative temperature coefficient which alters operation of said circuit at temperatures above said first predetermined level.
Claim 5
Dependent Claim
36 words
The circuit of claim 1 including a pair of series thermistors, one having a positive temperature coefficient and the other having a negative temperature coefficient, said two thermistors determining said first and second predetermined temperature levels.
Claim 6
Dependent Claim
26 words
The circuit of claim 1 wherein said temperature responsive means includes a triac which is exposed to ambient air temperatures which alters the triggering level thereof.
Claim 7
Dependent Claim
17 words
The circuit of claim 5 wherein said triac has a gate connected to an adjustable voltage source.
Claim 8
Dependent Claim
25 words
The circuit of claim 5 including a circuit component having a positive temperature coefficient serially arranged to cause increased voltage drop thereacross on increased temperature.
Claim 9
Dependent Claim
31 words
The circuit of claim 1 including a separate circuit incorporating said temperature sensitive means, and said signal forming means forming a signal applied to said switch means through an isolated connection.
Claim 10
Dependent Claim
12 words
The circuit of claim 1 wherein said switch means is a triac.
Claim 11
Dependent Claim
33 words
The circuit of claim 9 including a light dependent resistive circuit component which is light coupled to said signal forming means, and said circuit component is connected to the gate of said triac.
Claim 12
Dependent Claim
20 words
The thermostat of claim 1 wherein said temperature sensitive means includes a solid state semiconductor having a gate terminal thereon.
Claim 13
Dependent Claim
11 words
The circuit of claim 11 wherein the semiconductor is a triac.
Claim 14
Dependent Claim
17 words
The circuit of claim 12 wherein the triac has a gate connected to an adjustable bias level.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |