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GB1395420A - Thermal actuator - Google Patents

Thermal actuator

Info

Publication number
GB1395420A
GB1395420A GB3475772A GB3475772A GB1395420A GB 1395420 A GB1395420 A GB 1395420A GB 3475772 A GB3475772 A GB 3475772A GB 3475772 A GB3475772 A GB 3475772A GB 1395420 A GB1395420 A GB 1395420A
Authority
GB
United Kingdom
Prior art keywords
medium
piston
chamber
temperature
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3475772A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of GB1395420A publication Critical patent/GB1395420A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
    • F03G7/06112—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using the thermal expansion or contraction of enclosed fluids
    • F03G7/06113—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using the thermal expansion or contraction of enclosed fluids the fluids subjected to phase change

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Thermally Actuated Switches (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1395420 Temperature responsive actuating elements TEXAS INSTRUMENTS Inc 25 July 1972 [3 Aug 1971] 34757/72 Heading G1D A thermal actuator which converts electrical energy to mechanical movement comprises a casing 12 open at one end to allow movement therethrough of a piston 24 which is biased to the retracted position (as shown) by a spring 36. A portion of the piston 24 enters a chamber 16 holding a thermally expansible medium 20, an O-ring 84 being provided to sealingly mount a floating head piston 78 in the neck 18 of the chamber 16. Alternatively the portion of the piston entering the chamber may be in direct contact with the medium and itself bear the sealing ring, Fig. 1 (not shown). The medium 20 is heated by means including an element 22 which has a steeply sloped positive temperature coefficient of resistance above an anomaly temperature so as to generate heat which maintains the medium 20 at a predetermined temperature in response to continuous electrical energization. The heating element may comprise a ceramic wafer of semi-conducting barium titanate, the medium 20 may be oil, wax or polyethylene and the casing 12 may be integrally formed of phenolic plastics, or be in two parts (as shown) of aluminium 12a and phenolic plastics 12b. An aperture 38 allows initial calibration, excess medium 20 venting therethrough. A heat radiating element 70 may be employed to effect a more rapid expansion of the medium 20. The actuator may operate a valve or a switch.
GB3475772A 1971-08-03 1972-07-25 Thermal actuator Expired GB1395420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16865771A 1971-08-03 1971-08-03

Publications (1)

Publication Number Publication Date
GB1395420A true GB1395420A (en) 1975-05-29

Family

ID=22612397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3475772A Expired GB1395420A (en) 1971-08-03 1972-07-25 Thermal actuator

Country Status (8)

Country Link
US (1) US3686857A (en)
JP (1) JPS553650B2 (en)
BR (1) BR7205229D0 (en)
CA (1) CA949638A (en)
DE (1) DE2238076C2 (en)
FR (1) FR2149877A5 (en)
GB (1) GB1395420A (en)
IT (1) IT961763B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171517A (en) * 1985-02-14 1986-08-28 Larkeagle Limited Thermal linear actuator
GB2443261A (en) * 2006-10-26 2008-04-30 Starbridge Systems Ltd Wax micro actuator with semiconductor heating element
WO2009079785A1 (en) * 2007-12-21 2009-07-02 Messier-Dowty Inc. Landing gear uplock mechanism employing thermal phase-change actuation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225841A (en) * 1977-07-21 1980-09-30 Behr-Thomson Dehnstoffregler Gmbh Temperature-dependent switch
US4311653A (en) * 1977-11-10 1982-01-19 Texas Instruments Incorporated Fast idle carburetor system
US4253304A (en) * 1978-06-23 1981-03-03 A. W. Cash Valve Manufacturing Corporation Thermal element
US6152376A (en) * 1997-02-21 2000-11-28 Heat-Timer Corporation Valve modulation method and system utilizing same
IT1314176B1 (en) * 1999-01-08 2002-12-04 Eltex S P A IMPROVED SPEED ACTUATION DEVICE.
TW551735U (en) * 2002-10-08 2003-09-01 Polytronics Technology Corp Over-current protection device
DE102004023019A1 (en) * 2004-05-06 2005-12-01 Willy Vogel Aktiengesellschaft Dosing pump, in particular for lubricants, with expansion drive, lubricant reservoir for the dosing pump and lubrication method
DE102013208412A1 (en) * 2013-05-07 2014-11-13 Behr Thermot-Tronik Gmbh thermostat
US10006642B2 (en) 2014-05-09 2018-06-26 Jerritt L. Gluck Systems and methods for controlling conditioned fluid systems in a built environment
US20180286617A1 (en) * 2017-03-28 2018-10-04 Management Sciences, Inc. Method, System, and Apparatus to Prevent Electrical or Thermal-Based Hazards in Conduits

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266235A (en) * 1964-11-02 1966-08-16 Honeywell Inc Control apparatus
US3330480A (en) * 1964-11-09 1967-07-11 Dole Valve Co Thermal responsive actuator
DE1296011B (en) * 1966-07-02 1969-05-22 Danfoss As Fa Servomotor
US3404530A (en) * 1967-03-01 1968-10-08 United Carr Inc Heat motor
US3500634A (en) * 1968-01-02 1970-03-17 Texas Instruments Inc Control system and actuator used therein
US3505809A (en) * 1968-05-20 1970-04-14 Thermal Hydraulics Corp Thermal motor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171517A (en) * 1985-02-14 1986-08-28 Larkeagle Limited Thermal linear actuator
GB2443261A (en) * 2006-10-26 2008-04-30 Starbridge Systems Ltd Wax micro actuator with semiconductor heating element
GB2443261B (en) * 2006-10-26 2009-04-22 Starbridge Systems Ltd Wax micro actuator
GB2456681A (en) * 2006-10-26 2009-07-29 Starbridge Systems Ltd Therapeutic liquid pump with different valve actuation pressures
GB2456681B (en) * 2006-10-26 2009-11-11 Starbridge Systems Ltd Pump
AU2007310635B2 (en) * 2006-10-26 2014-01-16 Insulet Netherlands B.V. Wax micro actuator
US8784403B2 (en) 2006-10-26 2014-07-22 Cellnovo, Ltd. Wax micro actuator
WO2009079785A1 (en) * 2007-12-21 2009-07-02 Messier-Dowty Inc. Landing gear uplock mechanism employing thermal phase-change actuation
US8567716B2 (en) 2007-12-21 2013-10-29 Messier-Dowty Inc. Landing gear uplock mechanism employing thermal phase-change actuation

Also Published As

Publication number Publication date
JPS4825180A (en) 1973-04-02
FR2149877A5 (en) 1973-03-30
DE2238076C2 (en) 1984-04-12
IT961763B (en) 1973-12-10
CA949638A (en) 1974-06-18
BR7205229D0 (en) 1973-08-09
US3686857A (en) 1972-08-29
DE2238076A1 (en) 1973-02-15
JPS553650B2 (en) 1980-01-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee