US3913048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic switch
Assignee: Individual
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Filing: 1974-02-25
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Granted: 1975-10-14
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Expires: 1994-02-25
Abstract
Abstract A thermostatic switch is disclosed with a resilient and a rigid contact blade and with adjustment of the operating temperature of the thermostatic switch effected by adjustment of the position of a temperature responsive means such as a bimetallic member. This construction permits a thermostatic switch which has much more predictable operating characteristics and much more uniform operating characteristics, one switch to the next in a production run and a switch which has elimination of or minimization of an overshoot in temperature as the controlled electrical appliance comes up to operating temperature. Also, this thermostatic switch may have incorporated therein an attitude responsive means such as a pendulum to open the same switch contacts should the switch be tilted, as in an application of a tilt-responsive switch usable with an electric heater for example. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
Inventors
- 👤 Charles S Mertler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:56
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H35/00; H01H35/14; H01H3/00; H01H3/001
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
123 words
A thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means supported relative to said stack and acting on said first contact blade to actuate said first contact blade with tempeature changes, said temperature responsive means being a composite of a spring blade and a bimetallic blade connected in series and with said spring blade being fastened in said stack, and adjusting means acting between said base and said temperature responsive means for adjustment of the operating temperature of said contacts.
Claim 2
Dependent Claim
123 words
A thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means supported relative to said stack and acting on said first contact blade to actuate said first contact blade with tempeature changes, said temperature responsive means being a composite of a spring blade and a bimetallic blade connected in series and with said spring blade being fastened in said stack, and adjusting means acting between said base and said temperature responsive means for adjustment of the operating temperature of said contacts.
Claim 3
Dependent Claim
29 words
A thermostatic switch as set forth in claim 1, wherein said temperature responsive means is a bimetallic blade having a length less than that of said first contact blade.
Claim 4
Dependent Claim
30 words
A thermostatic switch as set forth in claim 2, wherein said bimetallic blade has a length less than the distance from said stack to the center of said first contact.
Claim 5
Dependent Claim
17 words
A thermostatic switch as claimed in claim 1, wherein said temperature responsive means is a bimetallic blade.
Claim 6
Dependent Claim
34 words
A thermostatic switch as claimed in claim 4, including means cooperating between a movable end of said bimetallic blade and acting on said first contact blade through an aperture in said second contact blade.
Claim 7
Dependent Claim
16 words
A thermostatic switch as claimed in claim 1, wherein said adjusting means is an adjusting screw.
Claim 8
Dependent Claim
22 words
A thermostatic switch as claimed in claim 6, wherein said adjusting screw acts through apertures in said first and second contact blades.
Claim 9
Dependent Claim
28 words
A thermostatic switch as claimed in claim 1, including means including said stack electrically insulating said first and second contact blades except when said contacts are in engagement.
Claim 10
Dependent Claim
51 words
A thermostatic switch as claimed in claim 1, including an extension on said spring blade extending beyond the connection point of said bimetallic blade and said spring blade, and an abutment acting between sAid bimetallic blade and said spring blade extension to act as a positive off means for said contacts.
Claim 11
Dependent Claim
136 words
A thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means supported relative to said stack and acting on said first contact blade to actuate said first contact blade with temperature changes, an adjusting screw acting between said base and said temperature responsive means for adjustment of the operating temperature of said contacts, said temperature responsive means being a bimetallic blade having one end thereof fixed in said stack, a free end of said bimetallic blade acting on said first contact blade, and said adjusting screw acting on a mid-portion of said bimetallic blade.
Claim 12
Dependent Claim
136 words
A thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means supported relative to said stack and acting on said first contact blade to actuate said first contact blade with temperature changes, an adjusting screw acting between said base and said temperature responsive means for adjustment of the operating temperature of said contacts, said temperature responsive means being a bimetallic blade having one end thereof fixed in said stack, a free end of said bimetallic blade acting on said first contact blade, and said adjusting screw acting on a mid-portion of said bimetallic blade.
Claim 13
Dependent Claim
125 words
A slow make and break thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a creep action resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means, means supporting said temperature responsive means from said stack and acting on said first contact blade to actuate said first contact blade with temperature changes, adjusting means connected for adjustment of the operating temperature of said contacts, and attitude responsive means mounted responsive to the attitude of said rigid second contact blade to actuate said contacts in at least one attitude of said second contact blade.
Claim 14
Dependent Claim
125 words
A slow make and break thermostatic switch comprising, in combination, a rigid base, a stack mounted on said base, a creep action resilient first contact blade mounted in said stack, a substantially rigid second contact blade mounted in said stack, first and second contacts on said first and second blades, respectively, and positioned for mutual cooperation, temperature responsive means, means supporting said temperature responsive means from said stack and acting on said first contact blade to actuate said first contact blade with temperature changes, adjusting means connected for adjustment of the operating temperature of said contacts, and attitude responsive means mounted responsive to the attitude of said rigid second contact blade to actuate said contacts in at least one attitude of said second contact blade.
Claim 15
Dependent Claim
23 words
A thermostatic switch as claimed in claim 11, wherein said attitude responsive means is mounted for movement relative to said second contact blade.
Claim 16
Dependent Claim
49 words
A thermostatic switch as claimed in claim 11, wherein said attitude responsive means is a pendulum swingably mounted on said rigid second contact blade, a cam movable in accordance with said pendulum, and a cam follower on the outboard end of said first contact blade cooperable with said cam.
Claim 17
Dependent Claim
117 words
A thermostatic switch as claimed in claim 11, wherein said attitude responsive means is a pendulum swingably mounted on said rigid second contact blade, a cam movable directly with said pendulum, a cam follower on the outboard end of said first contact blade, said cam having a cam null cooperating with said cam follower to establish said contacts in engagement with the pendulum hanging in a first position and with said adjustment means at one limit condition, said thermostatic switch being mountable in an electrical device subject to being tipped over whereat said pendulum may swing and have said cam actuate said cam follower to positively separate said contacts despite all adjustment positions of said adjusting means.
Claim 18
Dependent Claim
38 words
A thermostatic switch as set forth in claim 11, wherein said temperature responsive means is a composite of a spring blade and a bimetallic blade connected in series and with said spring blade being mounted in said stack.
Claim 19
Dependent Claim
17 words
A thermostatic switch as claimed in claim 11, wherein said temperature responsive means is a bimetallic blade.
Claim 20
Dependent Claim
34 words
A thermostatic switch as claimed in claim 16, including means cooperating between a movable end of said bimetallic blade and acting on said first contact blade through an aperture in said second contact blade.
Claim 21
Dependent Claim
26 words
A thermostatic switch as claimed in claim 11, wherein said adjusting means is an adjusting screw acting through apertures in said first and second contact blades.
Claim 22
Dependent Claim
50 words
A thermostatic switch as claimed in claim 28, wherein said temperature responsive means is a bimetallic blade having one end thereof mounted on said base, a free End of said bimetallic blade acting on said first contact blade, and said adjusting screw acting on a mid-portion of said bimetallic blade.
Claim 23
Dependent Claim
35 words
A thermostatic switch as claimed in claim 11, including a stack mounted on said base, and means including said stack electrically insulating said first and second contact blades except when said contacts are in engagement.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |