US3755770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat having improved temperature drift control means
Assignee: General Electric Co
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Filing: 1971-12-07
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Granted: 1973-08-28
•
Expires: 1991-12-07
Abstract
Abstract A thermostat is disclosed comprising a support and a thermally responsive bimetallic member having a peripheral section adjacent the support and a central section adapted for movement with respect to the peripheral section in response to temperature changes of the bimetallic member. First and second switch contacts are mounted for relative movement between switch contact open and switch contact closed positions. A spring is provided biasing one of the contacts. An actuating plunger is mounted between the bimetallic member and the spring for movement in response to movement of the bimetallic central section. Temperature drift control means are also provided which means include an energy absorbent dampener disposed between the bimetallic member peripheral section and the support.
Inventors
- 👤 E Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:18
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/54; H01H2037/5445
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
224 words
A thermostat comprising a support member; a stationary contact mounted by said support member; a resilient switch blade having a first blade section and a second blade section; a movable contact mounted by said first blade section for selective travel between open and closed positions relative to said stationary contact; means for fixedly securing said second blade section to said support member; a thermally responsive member having a bimetallic central section movable with respect to said support member and a peripheral section stationarily mounted by said support member; an actuating plunger mounted for movement with respect to said support member with a first plunger end adapted to engage said resilient switch blade and a second plunger end adapted to engage said thermally responsive member central section in response to changes in temperature of said thermally responsive member; a compressibly resilient washer sandwiched between said thermally responsive member peripheral section and said support member with a first washer planar suface in abutment with said thermally responsive member peripheral section and with a second washer planar surface opposite said first washer planar surface in abutment with said support member to suppress vibrations in said thermally responsive member and thereby damper temperature drift of the thermostat, and terminal means for electrically connecting said stationary contact and said movable contact to electrical conductors extending externally of said thermostat.
Claim 2
Dependent Claim
224 words
A thermostat comprising a support member; a stationary contact mounted by said support member; a resilient switch blade having a first blade section and a second blade section; a movable contact mounted by said first blade section for selective travel between open and closed positions relative to said stationary contact; means for fixedly securing said second blade section to said support member; a thermally responsive member having a bimetallic central section movable with respect to said support member and a peripheral section stationarily mounted by said support member; an actuating plunger mounted for movement with respect to said support member with a first plunger end adapted to engage said resilient switch blade and a second plunger end adapted to engage said thermally responsive member central section in response to changes in temperature of said thermally responsive member; a compressibly resilient washer sandwiched between said thermally responsive member peripheral section and said support member with a first washer planar suface in abutment with said thermally responsive member peripheral section and with a second washer planar surface opposite said first washer planar surface in abutment with said support member to suppress vibrations in said thermally responsive member and thereby damper temperature drift of the thermostat, and terminal means for electrically connecting said stationary contact and said movable contact to electrical conductors extending externally of said thermostat.
Claim 3
Dependent Claim
18 words
A Thermostat in accordance with claim 1 wherein said thermally responsive member is relatively thin and substantially planar.
Claim 4
Dependent Claim
14 words
A thermostat in accordance with claim 1 wherein said thermally responsive member is annular.
Claim 5
Dependent Claim
15 words
A thermostat in accordance with claim 1 wherein said thermally responsive member is a disc.
Claim 6
Dependent Claim
18 words
A thermostat in accordance with claim 1 wherein said compressibly resilient washer is relatively thin and substantially planar.
Claim 7
Dependent Claim
14 words
A thermostat in accordance with claim 1 wherein said compressibly resilient washer is annular.
Claim 8
Dependent Claim
29 words
A thermostat in accordance with claim 6 wherein said annular compressibly resilient washer defines an aperture through which said actuating rod may pass in spaced relation with said washer.
Claim 9
Dependent Claim
19 words
A thermostat in accordance with claim 1 wherein said annular, compressibly resilient washer is bonded to said bimetallic member.
Claim 10
Dependent Claim
30 words
A thermostat in accordance with claim 1 wherein said compressibly resilient washer consists essentially of a material selected from the group of materials consisting of resilient polyesters, polyimides and silicones.
Claim 11
Dependent Claim
16 words
A thermostat in accordance with claim 1 wherein said compressibly resilient washer consists essentially of rubber.
Claim 12
Dependent Claim
17 words
A thermostat in accordance with claim 10 wherein said compressibly resilient washer consists essentially of silicon rubber.
Claim 13
Dependent Claim
17 words
A thermostat in accordance with claim 10 wherein said compressibly resilient washer consists essentially of sponge rubber.
Claim 14
Dependent Claim
16 words
A thermostat in accordance with claim 1 wherein said compressibly resilient washer consists essentially of paper.
Claim 15
Dependent Claim
42 words
A thermostat in accordance with claim 1 including a second compressibly resilient washer mounted in contact with said thermally responsive member peripheral section with said thermally responsive member peripheral section sandwiched between said compressibly resilient washer and said second compressibly resilient washer.
Claim 16
Dependent Claim
224 words
A thermostat comprising a support member; a stationary contact mounted by said support member; a resilient switch blade having a first blade section and a second blade section; a movable contact mounted by said first blade section for selective travel between open and closed positions relative to said stationary contact; means for fixedly securing said second blade section to said support member; a thermally responsive member having a bimetallic central section movable with respect to said support member and a peripheral section stationarily mounted by said support member; an actuating plunger mounted for movement within and with respect to said support member in response to changes in temperature of said thermally responsive member with a first plunger end adapted to engage said resilient switch blade and a second plunger end adapted to engage said thermally responsive member central section; energy absorbent means disposed between said thermally responsive member peripheral section and said support member to suppress vibration in said thermally responsive member and thereby damper temperature drift of the thermostat , said energy absorbent means having a first planar surface in abutment with said thermally responsive member and a second planar surface opposite said first planar surface in abutment with said support member; and terminal means for electrically connecting said stationary contact and said movable contact to electric conductors extending externally of said thermostat.
Claim 17
Dependent Claim
224 words
A thermostat comprising a support member; a stationary contact mounted by said support member; a resilient switch blade having a first blade section and a second blade section; a movable contact mounted by said first blade section for selective travel between open and closed positions relative to said stationary contact; means for fixedly securing said second blade section to said support member; a thermally responsive member having a bimetallic central section movable with respect to said support member and a peripheral section stationarily mounted by said support member; an actuating plunger mounted for movement within and with respect to said support member in response to changes in temperature of said thermally responsive member with a first plunger end adapted to engage said resilient switch blade and a second plunger end adapted to engage said thermally responsive member central section; energy absorbent means disposed between said thermally responsive member peripheral section and said support member to suppress vibration in said thermally responsive member and thereby damper temperature drift of the thermostat , said energy absorbent means having a first planar surface in abutment with said thermally responsive member and a second planar surface opposite said first planar surface in abutment with said support member; and terminal means for electrically connecting said stationary contact and said movable contact to electric conductors extending externally of said thermostat.
Claim 18
Dependent Claim
16 words
A thermostat in accordance with claim 15 wherein said energy absorbent means comprises a metallic washer.
Claim 19
Dependent Claim
27 words
A thermostat in accordance with claim 16 wherein said metallic washer is mounted for restricted movement between said thermally responsive member peripheral section and said support member.
Claim 20
Dependent Claim
31 words
A thermostat in accordance with claim 16 wherein said metallic washer consists essentially of a soft metal selected from the group of metals consisting of copper, tin, lead and alloys thereof.
Claim 21
Dependent Claim
15 words
A thermostat in accordance with claim 15 wherein said energy absorbent meaNs is compressibly resilient.
Claim 22
Dependent Claim
119 words
A thermostat having a support, a thermally responsive member having a planar surface of a first section disposed facing said support and a bimetallic second section adapted for movement with respect to said first section in response to temperature changes of said thermally responsive member, first and second switch contacts mounted for relative movement between switch contact open and switch contact closed positions, a spring biasing one of said switch contacts, an actuating plunger mounted between said thermally responsive member and said spring for movement in response to movement of said bimetallic second section and means for controlling thermostat temperature drift including an energy absorbent dampener disposed between said thermally responsive member first section planar surface and said support.
Claim 23
Dependent Claim
119 words
A thermostat having a support, a thermally responsive member having a planar surface of a first section disposed facing said support and a bimetallic second section adapted for movement with respect to said first section in response to temperature changes of said thermally responsive member, first and second switch contacts mounted for relative movement between switch contact open and switch contact closed positions, a spring biasing one of said switch contacts, an actuating plunger mounted between said thermally responsive member and said spring for movement in response to movement of said bimetallic second section and means for controlling thermostat temperature drift including an energy absorbent dampener disposed between said thermally responsive member first section planar surface and said support.
Claim 24
Dependent Claim
15 words
A thermostat in accordance with claim 20 wherein said energy absorbent dampener is compressibly resilient.
Claim 25
Dependent Claim
19 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of polyethylene terephthalate.
Claim 26
Dependent Claim
19 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of a polyimide.
Claim 27
Dependent Claim
18 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of silicone.
Claim 28
Dependent Claim
18 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of rubber.
Claim 29
Dependent Claim
19 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of silicon rubber.
Claim 30
Dependent Claim
19 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of sponge rubber.
Claim 31
Dependent Claim
18 words
A thermostat in accordance with claim 21 wherein said compressibly resilient energy absorbent dampener consists essentially of paper.
Claim 32
Dependent Claim
16 words
A thermostat in accordance with claim 20 wherein said energy absorbent dampener comprises a metallic washer.
Claim 33
Dependent Claim
31 words
A thermostat in accordance with claim 29 wherein said metallic washer consists essentially of a soft metal selected from the group of metals consisting of copper, tin, lead and alloys thereof.
Claim 34
Dependent Claim
25 words
A thermostat in accordance with claim 29 wherein said metallic washer is mounted for restricted movement between said bimetallic member peripheral section and said support.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |