US3715699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat with reset pin
Assignee: Fasco Controls Corp
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Filing: 1971-07-15
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Granted: 1973-02-06
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Expires: 1991-07-15
Abstract
Abstract A reset pin is mounted to reciprocate in one end of a thermostat, and a pair of terminals project from the opposite end. A switch in the thermostat is normally held closed by a bimetallic, temperature-responsive disc, which is positioned between the reset pin and switch arm to operate both. A compression spring normally holds the reset pin in a retracted position in the thermostat, when the switch is closed. When the ambient temperature of the thermostat exceeds a predetermined value, the disc snaps against the reset pin to drive it outwardly to an extended position, and to allow the switch to open. The disc can be reset by pushing the pin inwardly when the ambient temperature falls to normal.
Inventors
- 👤 C Hire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:02
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/54; H01H37/5409
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
A thermostat, comprising a cup-shaped base having a pair of spaced electrical terminals projecting from one side thereof, a normally-open switch mounted on the opposite side of said base and operative electrically to connect said terminals, when closed, and to disconnect said terminals from each other, when open, a cover secured over said base, a bimetallic disc mounted on the rim of said base beneath said cover normally to bow at its center into said cup-shaped base to close said switch, and operative to flex at its center outwardly to allow said switch to open, when the ambient temperature of the switch exceeds a predetermined value, means insulating said disc electrically from said switch, a reset pin mounted to reciprocate in an opening in said cover coaxially of said disc between a retracted position in which said pin is located substantially wholly within said cover and an extended position in which said pin projects at one end thereof outwardly beyond said cover readily to be viewable from the exterior of said cover, and a spring interposed between said cover and a projection on the iNner end of said pin resiliently to hold the inner end of said pin against the side of said disc remote from said switch.
Claim 2
Dependent Claim
208 words
A thermostat, comprising a cup-shaped base having a pair of spaced electrical terminals projecting from one side thereof, a normally-open switch mounted on the opposite side of said base and operative electrically to connect said terminals, when closed, and to disconnect said terminals from each other, when open, a cover secured over said base, a bimetallic disc mounted on the rim of said base beneath said cover normally to bow at its center into said cup-shaped base to close said switch, and operative to flex at its center outwardly to allow said switch to open, when the ambient temperature of the switch exceeds a predetermined value, means insulating said disc electrically from said switch, a reset pin mounted to reciprocate in an opening in said cover coaxially of said disc between a retracted position in which said pin is located substantially wholly within said cover and an extended position in which said pin projects at one end thereof outwardly beyond said cover readily to be viewable from the exterior of said cover, and a spring interposed between said cover and a projection on the iNner end of said pin resiliently to hold the inner end of said pin against the side of said disc remote from said switch.
Claim 3
Dependent Claim
208 words
A thermostat, comprising a cup-shaped base having a pair of spaced electrical terminals projecting from one side thereof, a normally-open switch mounted on the opposite side of said base and operative electrically to connect said terminals, when closed, and to disconnect said terminals from each other, when open, a cover secured over said base, a bimetallic disc mounted on the rim of said base beneath said cover normally to bow at its center into said cup-shaped base to close said switch, and operative to flex at its center outwardly to allow said switch to open, when the ambient temperature of the switch exceeds a predetermined value, means insulating said disc electrically from said switch, a reset pin mounted to reciprocate in an opening in said cover coaxially of said disc between a retracted position in which said pin is located substantially wholly within said cover and an extended position in which said pin projects at one end thereof outwardly beyond said cover readily to be viewable from the exterior of said cover, and a spring interposed between said cover and a projection on the iNner end of said pin resiliently to hold the inner end of said pin against the side of said disc remote from said switch.
Claim 4
Dependent Claim
208 words
A thermostat, comprising a cup-shaped base having a pair of spaced electrical terminals projecting from one side thereof, a normally-open switch mounted on the opposite side of said base and operative electrically to connect said terminals, when closed, and to disconnect said terminals from each other, when open, a cover secured over said base, a bimetallic disc mounted on the rim of said base beneath said cover normally to bow at its center into said cup-shaped base to close said switch, and operative to flex at its center outwardly to allow said switch to open, when the ambient temperature of the switch exceeds a predetermined value, means insulating said disc electrically from said switch, a reset pin mounted to reciprocate in an opening in said cover coaxially of said disc between a retracted position in which said pin is located substantially wholly within said cover and an extended position in which said pin projects at one end thereof outwardly beyond said cover readily to be viewable from the exterior of said cover, and a spring interposed between said cover and a projection on the iNner end of said pin resiliently to hold the inner end of said pin against the side of said disc remote from said switch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |