US4150786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature sensor means with integral temperature limit functions
Assignee: GUIDECO Corp
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Filing: 1977-07-15
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Granted: 1979-04-24
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Expires: 1997-07-15
Abstract
Abstract A temperature control system, shown as a differential temperature control system, uses a special temperature sensor means. The temperature sensor means includes a resistance temperature responsive element that is paralleled by one or more temperature responsive switches that act as a limit, or are connected in series with an additional temperature responsive switch that also acts as a limit.
Inventors
- 👤 Donald E. Sable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:45
CPC Classifications
G; G01; G01K; G01K7/00; G01K3/00; G01K3/08; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1924; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
Temperature sensor means having integral temperature limit functions adapted to be connected to a temperature control system, including: temperature responsive resistance means including connection means adapted to be connected to said temperature control system; temperature responsive switch means connected to said connection means with said temperature responsive switch means responsive to a limit temperature to override the control of said temperature responsive resistance means in the event said limit temperature is reached; said temperature responsive switch means including at least a temperature responsive switch in series with a resistor with said resistor having an ohmic value selected to be parallel connected with said temperature responsive resistance means to cause said sensor means to safely limit the operation of said temperature control system at said limit temperature; and enclosure means enclosing said temperature responsive resistance means and said temperature responsive switch means in a common temperature environment.
Claim 2
Dependent Claim
146 words
Temperature sensor means having integral temperature limit functions adapted to be connected to a temperature control system, including: temperature responsive resistance means including connection means adapted to be connected to said temperature control system; temperature responsive switch means connected to said connection means with said temperature responsive switch means responsive to a limit temperature to override the control of said temperature responsive resistance means in the event said limit temperature is reached; said temperature responsive switch means including at least a temperature responsive switch in series with a resistor with said resistor having an ohmic value selected to be parallel connected with said temperature responsive resistance means to cause said sensor means to safely limit the operation of said temperature control system at said limit temperature; and enclosure means enclosing said temperature responsive resistance means and said temperature responsive switch means in a common temperature environment.
Claim 3
Dependent Claim
38 words
Temperature sensor means as described in claim 1 wherein said temperature responsive switch is a thermal ferrite type of switch using a Curie point temperature responsive material to cause said switch means to operate at said limit temperature.
Claim 4
Dependent Claim
30 words
Temperature sensor means as described in claim 2 wherein said temperature responsive resistance means is a positive temperature coefficient resistor and said temperature responsive switch is a normally open switch.
Claim 5
Dependent Claim
72 words
Temperature sensor means as described in claim 1 wherein said temperature responsive switch means includes a plurality of temperature responsive switches each responsive to a different temperature and including a series connected resistor with said resistors each having an ohmic value selected to be parallel connected with said temperature responsive resistance means to cause said sensor means to change the control of said temperature control system as said temperature responsive switches operate.
Claim 6
Dependent Claim
43 words
Temperature sensor means as described in claim 4 wherein said temperature responsive switches are a thermal ferrite type of switch using a Curie point temperature responsive material to cause said switch to operate as said different temperatues are reached at said sensor means.
Claim 7
Dependent Claim
92 words
Temperature sensor means as described in claim 1 wherein said temperature responsive switch means includes a plurality of temperature responsive switches each responsive to a different temperature and each including a series connected resistor with said resistors each having an ohmic value selected to be connected to said temperature control system when said temperature responsive switches operate; and said connection means including three conductors so that said temperature responsive switches can be connected in series with one another between said three conductors to provide a differential control of said temperature control system.
Claim 8
Dependent Claim
39 words
Temperature sensor means as described in claim 6 wherein said temperature responsive switches are thermal ferrite types of switches using a Curie point temperature responsive material to cause said switch means to operate to control said temperature control system.
Claim 9
Dependent Claim
29 words
Temperature sensor means as described in claim 7 wherein said temperature responsive resistance means is a positive temperature coefficient resistor and said temperature responsive switches are normally open switches.
Claim 10
Dependent Claim
50 words
Temperature sensor means as described in claim 8 wherein said temperature responsive switch means includes said temperature responsive switches and their associated resistors connected with said temperature responsive resistance means to cause said sensor means to change the control of said temperature control system as said temperature responsive switches operate.
References Cited (Backward Citations)
US2949237A
Cited
US3838811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |