With Spring Or Other Energy Storage Means Patents (Class 337/342)
  • Patent number: 11158471
    Abstract: Provided is a breaker capable of further downsizing without impairing rigidity and strength of a case. The breaker 1 comprises a fixed contact 21, a movable piece 4 having and pressing a movable contact 41 to the fixed contact 21, a thermally responsive element 5 for moving the movable piece 4 to separate the movable contact 41 from the fixed contact 21 by deformation thereof responding to temperature change, a case for containing the fixed piece 21, the movable piece 4 and the thermally responsive element 5, and a cover piece 8 attached on the case 7. The case 7 has an end face 72 on which the cover piece 8 is disposed, a containing recess 73 caved from the end face 72 and forming a space to which the movable piece 4 and the thermally responsive element 5 are contained, and a first protrusion protruding from the end face 72 and to which the cover piece 8 is fitted.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 26, 2021
    Assignees: BOURNS KK, POLYPLASTICS CO., LTD.
    Inventors: Masashi Namikawa, Shinichi Hirota
  • Patent number: 8847725
    Abstract: A temperature-dependent switch comprising a temperature-dependent switching mechanism having a snap-action disc, a housing having a lower part and an upper part which accommodates the switching mechanism, at least two stationary contacts provided on the inner surface of the upper part, each of which is connected to an outer connection, and a current transfer member arranged on the snap-action disc that is moved by said snap-action disc. The snap-action disc presses the current transfer member, in a temperature-dependent manner, against the two stationary contacts which serve as bearing areas for the current transfer member. A third bearing area for the current transfer member is provided on the inner surface. The current transfer member is an approximately round contact plate having on its surface facing the stationary contacts, a contact area closed in a circumferential direction around an axis of symmetry of the switch.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: September 30, 2014
    Assignee: Thermik Geraetebau GmbH
    Inventor: Lutz Buettner
  • Publication number: 20120293296
    Abstract: A thermostat includes a temperature sensitive element that is responsive to temperature variations to selectively move between at least a first position and a second position. The transfer pin is movable with the temperature sensitive element and is configured, upon movement of the temperature sensitive element from the first position to the second position, to supply a force to a switch that moves the switch from a first switch position to a second switch position. A spring is coupled to the switch and is configured to selectively supply at least a first retainer force to the switch that, when the switch is in the second switch position, retains the switch in the second switch position when the temperature sensitive element moves from the second position back to the first position.
    Type: Application
    Filed: May 17, 2011
    Publication date: November 22, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Senthilkumar MK, Chandrashekar Srinivas, Rajesh Narayanan, Phaneendra Govindasetty Tirumani, Balaji K. Krishnaswamy
  • Patent number: 7292131
    Abstract: A heat-sensitive switch includes a first terminal, a second terminal away from the first terminal, a reverse spring reversing at a set temperature and having an opening part and positioned between the first and second terminals, and a junction spring positioned between the reverse spring and the second terminal without being fixed, integrally having a junction part protrusively positioned and in contact with the first terminal via the opening part, and also having an outer peripheral part in contact with the second terminal. An electric connection between the first and second terminals is formed, and when the reverse spring reverses at the set temperature, a force is applied to the junction part of the junction spring in the direction away from the first terminal, whereby the electric connection is cut.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: November 6, 2007
    Assignee: Fuji Electronics Industries Co., Ltd.
    Inventor: Masaji Masuda
  • Publication number: 20040217843
    Abstract: A steam-responsive switch for use in an electrical water boiling appliance comprises a main body (12) from which extends a tubular portion (13) having at or near its leading end a heat responsive bimetal (16) extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body (12) an electrical contact pair, the bimetal (16) engaging on its rear face a slidable pushrod (20) which extends through the main body (12) in a sealed manner to act on the electrical contact pair, the tubular portion having a steam/air vent (64) at one side thereof adjacent the rear face of the bimetal (16).
    Type: Application
    Filed: May 28, 2004
    Publication date: November 4, 2004
    Inventor: Martin J. Shepherd
  • Publication number: 20030169145
    Abstract: An apparatus is described for mounting a bimetal coil in a thermostat having an anticipator operable via an anticipator circuit. The apparatus includes an insulating member configured to insulate the coil from the anticipator circuit. The apparatus also includes a conductive shaft configured for mounting the coil and anticipator thereon. The insulating member is further configured for mounting between the coil and the shaft. This apparatus allows an inner end of a bi-metal coil to be secured easily in a thermostat, thus eliminating a need for more expensive mounting methods and costly insulating parts. The apparatus also simplifies calibration while reducing costs of assembly and materials.
    Type: Application
    Filed: March 7, 2002
    Publication date: September 11, 2003
    Inventors: William D. Rhodes, Bartholomew L. Toth
  • Patent number: 6597273
    Abstract: A thermal projector includes a switching mechanism section having a fixed contact, a movable contact disposed so as to face the fixed contact. There are first and second external connection terminals projecting sideward and connected electrically to the fixed contact and movable contact, respectively. The switching mechanism section is constructed so that the movable contact is displaced by a deforming operation of a thermally-actuated element so as to be separated from and brought into contact with the fixed contact. A resin bottomed case having a peripheral wall is located around the switching mechanism section in a manner so that the first and second external connection terminals penetrate the peripheral wall, and the penetrating portions are adhesively sealed by molding the peripheral wall integrally with the connection terminals. There is a film formed member of an electric insulating material.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: July 22, 2003
    Assignee: Uchiya Thermostat Co., Ltd.
    Inventor: Hideaki Takeda
  • Publication number: 20030122650
    Abstract: There is disclosed a thermal protector, which comprises an insulating resin-made flat case having a case body and a cover body joined with the case body; a fixed electrode having a fixed contact located on an inner bottom portion of the case body and a terminal part exposed to the outside of the case body, the fixed electrode being fixed to the case body; a movable electrode having, on a tip end thereof, a movable contact, while having, on a basal end thereof, a terminal part fixed to the cover body and having a portion exposed to the outside of the cover body, the movable electrode being placed such as to allow, by a spring action thereof, the movable contact to make contact with the fixed contact, the basal end of the movable electrode being fixed to the cover body; and a thermo-reactive element housed in the case so as to allow the movable electrode to operate to disconnect the movable contact from the fixed contact when a predetermined operating temperature of the thermo-reactive element is reached.
    Type: Application
    Filed: December 6, 2002
    Publication date: July 3, 2003
    Inventors: Kiyoshi Yamamoto, Takeshi Nagai
  • Publication number: 20030095029
    Abstract: A steam-responsive switch for use in an electrical water boiling appliance comprises a main body (12) from which extends a tubular portion (13) having at or near its leading end a heat responsive bimetal (16) extending across the mouth thereof which changes shape above a predetermined temperature defining a chamber behind the member and at the opposite face of the main body (12) an electrical contact pair, the bimetal (16) engaging on its rear face a slidable pushrod (20) which extends through the main body (12) in a sealed manner to act on the electrical contact pair, the tubular portion having a steam/air vent (64) at one side thereof adjacent the rear face of the bimetal (16).
    Type: Application
    Filed: November 8, 2002
    Publication date: May 22, 2003
    Inventor: Martin J. Shepherd
  • Patent number: 6515571
    Abstract: A thermal protector is configured so that a raised portion 23 and a lowered portion 27 with the attachment face of a movable contact 21 being the reference are provided at the rear of and close to the movable contact 21 on a movable plate 20, and a tongue 31 projectingly provided in a front end portion of a bimetal element 30 is fitted in a gap 24 formed by the raised portion 23 and lowered portion 27. Therefore, a thin shape can be realized without impaired stability of operation.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: February 4, 2003
    Assignee: Uchiya Thermostat Co., Ltd.
    Inventor: Hideaki Takeda
  • Patent number: 6448883
    Abstract: A switch has a temperature-dependent switching mechanism with a stationary contact element; a movable contact element coacting with the stationary contact element; and a bimetallic element, having a predetermined functional service life, that as a function of its temperature lifts the movable contact element away from the stationary contact element, the two contact elements being, in one switch position, in contact with one another in order to carry a current that is to be guided through the switch, and in a second switch position, lifted away from one another so that the switch is open. The two contact elements are arranged and coordinated with one another in such a way that when the functional service life of the bimetallic element is reached, the switching mechanism is welded in the second switch position.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: September 10, 2002
    Inventor: Marcel Hofsäss
  • Patent number: 6396381
    Abstract: The central portion of a movable plate 40 is cut into a U shape to form a tongue 43 provided along the longitudinal axis of the movable plate 40, the tongue 43 is brought into close contact with an upper electrode face 31 of a heating resistor 30, a lower electrode face 32 of the heating resistor 30 is brought into contact with a fixed plate 10, and portions of the movable plate 40 located on both sides of a cut 46 operate as an elastic arm 47.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: May 28, 2002
    Assignee: Uchiya Thermostat Co., Ltd.
    Inventor: Hideaki Takeda
  • Patent number: 6091316
    Abstract: A switch is described, having a housing 12 which receives a temperature-dependent switching mechanism 11 and which has a first housing part 15 on whose inner base 25 a first electrode 24 connected to a first external terminal 23 is arranged, as well as a second housing part 14, closing off the first housing part 15, that comprises a second electrode 20 connected to a second external terminal 22. The switching mechanism 11 creates, as a function of its temperature, an electrically conducting connection between the first and the second electrode 24, 20. A series resistor 34 is arranged in the housing 12, geometrically and electrically between the switching mechanism 11 and one of the two electrodes 20, 24.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: July 18, 2000
    Inventor: Marcel Hofsass
  • Patent number: 6078246
    Abstract: A method and apparatus for setting striker pin length and armature spring force in a thermal switch. An armature support structure is deformed in order to adjust armature spring force with the result of a spring force which remains constant over time and thermal cycling.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: June 20, 2000
    Assignee: AlliedSignal
    Inventors: George D. Davis, Byron G. Scott
  • Patent number: 6064295
    Abstract: A temperature-dependent switch (10) comprises a bimetallic switching mechanism (12) that is arranged in a housing (11) having a first housing part (14) made of insulating material and a second housing part (17). The bimetallic switching mechanism (12) is connected to a first electrode (16) that is guided out of one housing part (14), and coacts with a second electrode (19) that is provided internally on the other housing part (17). The bimetallic switching mechanism (12) comprises a spring element (23), working against a bimetallic disk (29), which carries a movable contact (28) that coacts with the second electrode (19). There is provided laterally on the spring element (23) a retaining extension piece (25) at which it is attached to the first electrode (16).
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: May 16, 2000
    Assignee: Thermik Geratebau GmbH
    Inventors: Michael Becher, Edwin Guttinger
  • Patent number: 6054916
    Abstract: A switch has a housing which receives a temperature-dependent switching mechanism and comprises a lower part on whose inner bottom a first countercontact for the switching mechanism is arranged, and a cover part, closing off the lower part, on whose inner side a second countercontact for the switching mechanism is provided. The switching mechanism has an electrically conductive spring disk which carries a movable contact element and operates against a bimetallic snap disk which sits approximately centeredly on the movable contact element, the spring disk being braced at its rim against the countercontacts and pressing the movable contact element against the countercontact when the switching mechanism is below its response temperature. The countercontact against which the spring disk is braced at its rim below the response temperature is magnetic.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: April 25, 2000
    Inventor: Marcel Hofsass
  • Patent number: 6031447
    Abstract: A switch has a housing 12 which receives a temperature-dependent switching mechanism 11, a first housing part 15 on whose inner base 25 a first electrode 24 connected to a first external terminal 23 is arranged, and a second housing part 14, closing off the first housing part 15, that has a second electrode 20 connected to a second external terminal 22. The switching mechanism 11 creates, as a function of its temperature, an electrically conducting connection between the first and the second electrode 24, 20. A parallel resistor 33 is arranged in the housing 12, geometrically and electrically between the two electrodes 20, 24.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: February 29, 2000
    Inventor: Marcel Hofsass
  • Patent number: 5903210
    Abstract: A temperature-dependent switch has first and second external terminals arranged at an electrically conductive lower housing part and an insulating cover part, respectively. Within said lower housing part there is arranged a temperature-dependent switching mechanism having a bimetallic snap disk and an electrically conductive spring disk carrying a movable contact element that is configured integrally with and as a dome on the spring element. Depending on the temperature of said bimetallic snap disk said spring element is in electrical contact with said first terminal and via said movable contact element with said second terminal.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: May 11, 1999
    Inventor: Marcel Hofsass
  • Patent number: 5894260
    Abstract: An actuator (144) for initiating a trip of a circuit breaker. Load current passes through a conductor (66) that is electrically coupled to a contact arm (56) by a braid (62). A thermally responsive bi-metal (64) has a first end portion which is disposed against a portion of the conductor (66) and through which at least a portion of load current carried by the contact arm, the braid, and the conductor passes. The bi-metal further has a second end portion that is disposed in spaced relation to the conductor and is cantilever-mounted on the portion of the conductor via the bi-metal's first end portion. The bi-metal is nominally flat and straight, but increasingly warps as thermal energy in the bi-metal increases. Upon attaining a certain degree of warping, the bi-metal initiates a trip of the circuit breaker by causing the contact arm to swing from a circuit-making to a circuit-breaking condition.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: April 13, 1999
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Stephen D. Cella, Andrew J. Kralik
  • Patent number: 5864279
    Abstract: An apparatus (10) for protecting an electrical device (11) from overtemperature comprises a temperature-dependent switch (22) with a housing (23) on whose base (28) a first connecting contact (51) is provided. A second connecting contact is provided on the housing (23). Also provided is a holder (14) which carries the housing (23) and has an external terminal (27) connected to the second connecting contact. The holder (14) is electrically insulated with respect to the base (28) of the housing (23) and is designed, in the state as mounted on the device (11), to press the base (28) of the housing (23) onto a contact surface (29) provided on the device (11).
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: January 26, 1999
    Assignee: Thermik Geratebau GmbH
    Inventors: Michael Becher, Edwin Guttinger
  • Patent number: 5847637
    Abstract: A thermal protector includes a bimetal plate which is prevented from being vibrated by a magnetic field produced by a transformer or a motor. A member made of magnetic material is disposed in the vicinity of the bimetal plate. The fixed member for loosely holding the bimetal plate may be made of magnetic material. The fixed metal fitting for connecting a first fixed plate with a movable plate is extended near to the bimetal plate and is made of magnetic material.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: December 8, 1998
    Assignee: Uchiya Thermostat Co., Ltd.
    Inventors: Hideaki Takeda, Katsuya Sakamaki
  • Patent number: 5847636
    Abstract: A user adjustable switching controller for duty cycle regulating flow of current to an electrical load such as a resistance heater, particularly for cooking appliances. A load current switch, when closed by a user operated cam also energizes a heat motor which includes a resistive strip attached to one active leg of a U-shaped bi-metal member. The load current switch snap spring is attached to the heated leg of the bi-metal. The other leg of the U-shaped bi-metal is anchored to one of the load connecting stationary terminals and serves to provide ambient temperature compensation. User rotation of the cam deflects a bias spring which acts on the portion of the bi-metal attached to the load switch snap spring to effect closing of the load current switch and energization of the heat motor. Heating of the bi-metal causes warpage which overcomes the bias spring to open the load switch and shut off the heat motor. Cooling of the bi-metal allows the load current switch to re-close repeating the cycle.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: December 8, 1998
    Inventor: Scott B. Sehlhorst
  • Patent number: 5844465
    Abstract: A time-delay switch responsive to a sensor 36 having a temperature compensation feature including bimetallic creep-type strip elements (10, 11). Additionally, the switch has an alarm function (A) with a manual reset button (9).
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: December 1, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: Eduardo Armenio, Giancarlo Attena, Giuseppe Notaro
  • Patent number: 5796327
    Abstract: A thermally-responsive current-sensitive switch having a molded plastic body containing first and second terminals in the form of metal stampings and having an internal chamber wherein a leaf spring and a snap-acting bimetallic blade of the same shape are together spot-welded to one of the terminals with the leaf spring underlying the bimetal in registry therewith and at its other end carrying a sliver contact which cooperates in switching operations with the other switch terminal. In one embodiment, the spring bias of the leaf spring tends to open the switch and the force generated by the bimetal in its contacts-closing movement is sufficient to overcome the spring bias of the leaf spring, whereas in another embodiment the leaf spring develops either a neutral force or a contacts-opening force. The leaf spring electrically shunts the bimetal, whereby the current-carrying capability of the switch is increased and different switch specifications can use the same bimetal with different leaf springs.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: August 18, 1998
    Assignee: Otter Controls Limited
    Inventor: David Andrew Smith
  • Patent number: 5790010
    Abstract: An electrical switch incorporating a snap-acting M-blade is actuated by a lever requiring a low actuation force and is actuated by a bridge engaging a critical region of the M-blade's double-loop end to provide an extremely low differential. Together, the means for actuating cover a broad range of applications. Additional features include a snap-acting M-blade actuated by a second snap-acting device, and the lever comprising an integral tab that serves as a pivot point.
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: August 4, 1998
    Inventor: Pierre P. Schwab
  • Patent number: 5696479
    Abstract: An energy regulator includes a pivotally mounted, U-shaped bimetallic element, one limb of which acts as an actuator for a microswitch arm, which is pivotally mounted to one end thereof. The other limb acts as a compensating bimetal and has a cam follower that engages a control surface of a control cam. The stressed C spring formed by the microswitch acts to bias the element into a pivotal mount in the housing, to bias the contact arm onto a pivotal seat on the end of the actuator and also generates a moment to bias the cam follower into engagement with its control surface.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: December 9, 1997
    Assignee: Strix Limited
    Inventors: Dominic Michael Anthony Oughton, John Crawshaw Taylor
  • Patent number: 5670930
    Abstract: A temperature-dependent switch (10) to close or open an electric circuit depending on the temperature of a bimetallic part (26) comprises an electrically conductive housing (12) with an underside (13). An electrically conductive cover (16) is provided to close the housing (12). There is an insulating disk (17) between the housing (12) and the cover (16) which electrically isolates the housing (12) from the cover (16). The housing (12) contains a switching device (15) which makes or breaks an electric contact between the housing (12) and the cover (16) depending on the temperature of the bimetallic part (26), whereby the electric circuit can be connected on the one hand to the cover (16) and on the other to the housing (12).
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: September 23, 1997
    Inventors: Peter Hofsass, deceased, by Ulrika Hofsass, legal representative, by Marcel Peter Hofsass, legal representative, by Denise Petra Hofsass, legal representative, by Henrik Peter Hofsass, legal representative, by Carola Rika Hofsass, legal representative, by Benjamin Michael Hofsass, legal representative
  • Patent number: 5604338
    Abstract: A temperature compensating low pressure sensor for verifying loss of gas from an inflator of a vehicle restraint safety system. The sensor includes a housing and a pressure diaphragm in communication with the fluid in the inflator. A temperature sensitive bimetallic thermostat is disposed within the housing. The thermostat expands with relation to a change in temperature of the fluid at the same rate as the pressure diaphragm. A retainer in communication with the pressure diaphragm is movably disposed in the housing. A stack of spring washers is disposed between the retainer and the thermostat for counteracting the pressure of the fluid acting upon the diaphragm. A contact arm in contact with the thermostat moves with the retainer.
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: February 18, 1997
    Assignee: Morton International, Inc.
    Inventors: Donald J. Paxton, Marcus T. Clark, Brian H. Fulmer
  • Patent number: 5483216
    Abstract: A fixing method and assembly of a temperature responsive element capable of detecting variation in temperature of discharge cooling medium of a compressor exactly and rapidly and preventing the compressor from being burned. A through hole is formed in a cover 6 which covers a path 7B for discharge cooling medium of the compressor. A plug 9 is fixed to the through hole from the side of the path by a fixing member 13. In this case, it is sealed airtightly by means of a packing. Lead terminal pins penetrating the plug 9 is insulatively fixed in the plug airtightly. Leads are connected to one ends of the lead terminal pins projecting outside and the temperature responsive clement 8 is connected to the other ends of the lead terminal pins projecting on the side of the discharge path. The temperature responsive clement 8 is disposed not to come into direct contact with a vessel and the cover 6 of the compressor and is exposed to discharge cooling medium as a whole.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 9, 1996
    Assignees: Ubukata Industries Co, Ltd., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Yasukazu Mizutani, Shigemi Sato, Hideki Koseki, Ryuhei Tanigaki, Takayuki Iio
  • Patent number: 5320162
    Abstract: A thermostat is disclosed having a bimetallic strip actuating a single pole, double throw switch, one throw to sense temperatures below the lower limit of a set point range and the other throw to sense temperatures above the upper limit of the set point range. In typical applications one throw for actuating heating and the other throw for actuating cooling. The bimetallic strip is provided with typically a cantilever support at one end and extends between dimensional spaced double throw contacts at the opposite end. Spacing of the contacts determines magnitude of the set point range. An intermediate beam type support is provided between the cantilever support and double throw contacts. This beam support consists of an adjustment screw acting on one side of the bimetallic strip and a spring directly opposing the adjustment screw.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: June 14, 1994
    Inventor: William E. Seaman
  • Patent number: 5159308
    Abstract: A thermostatic switch has a contact arm which is adapted for reducing contact pressure and maximizing wiping action between fixed and movable contacts. The switch includes a housing, a pair of terminals mounted in the housing, a resilient contact arm connected to one of the terminals, a movable contact on the contact arm, a stationary contact connected to the other terminal, and an actuator assembly for opening and closing the switch. The contact arm is integrally struck from a resilient, electrically conductive metal and it includes a base portion, and a pair of supporting members extending outwardly and upwardly from the base portion and then bending back thereover merging into a main portion. The main portion includes a peripheral edge portion having a contact area, and a plurality of finger portions which converge inwardly therefrom and merge into an actuator portion.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: October 27, 1992
    Assignee: Elmwood Sensors, Inc.
    Inventors: Thomas H. Bowder, Michael F. Donais
  • Patent number: 5043690
    Abstract: A thermal actuator utilizes a bimetallic snap action member such as a disc to actuate a member such as the armature of a switch to effect opening and closing of the switch. A resilient biasing member, such as an elongated curved spring member or a compressible member, engages the bimetallic member on a side opposite that of the actuated member to oppose the force exerted by the actuated member during the operation of the actuator.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: August 27, 1991
    Assignee: Sundstrand Data Control, Inc.
    Inventor: Karl H. Wahls
  • Patent number: 4646054
    Abstract: A thermal switch for breaking an electrical circuit to prevent overheating s described. The thermal switch includes a bimetallic thermocouple in the form of a snap disc and a leaf spring. The leaf spring supports an electrical contact. When the leaf spring is in its stressed position, the electrical contact keeps an electrical circuit closed. When the temperature rises too high, the snap disc snaps in a direction which causes the leaf spring to move into its unstressed position, thereby opening the circuit. When the temperature has decreased, the switch can be reset.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: February 24, 1987
    Assignee: Electrovac, Fabrikation Elektrotechnischer Spezialartikel GmbH
    Inventor: Helmut Bayer
  • Patent number: 4528541
    Abstract: In a bimetal controlled snap disc thermal switch for controlling the heating current to an electrical heating member, the switch including: a support plate arranged to be in thermal communication with the member; a bimetal snap disc which rests against the support plate to be in thermal communication therewith and which is formed to undergo a deformation dependent on its temperature; a switch element supported in the housing and operable for controlling the heating current, the switch element having a fixed contact and a movable contact; a contact spring carrying the movable contact and mounted for pivotal movement in the direction of the deformation of the snap disc; a movement transfer member movable in the direction of deformation of the snap disc and interposed between the snap disc and the contact spring for acting on the contact spring with play to pivot the contact spring in a direction to separate the movable contact from the fixed contact in response to a deformation of the snap disc; and a compressi
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: July 9, 1985
    Assignee: Inter Control Hermann Kohler Elektrik GmbH & Co.
    Inventors: Walter Hollweck, Kurt Marz, Herbert Eschenbacher