Abstract: A thermal protector has superiority in current responsiveness or thermal responsiveness with a simple configuration that does not need a separate manufacturing step of incorporating a resistor. At a stage of press processing for cutting from an original material, a movable plate body part 16 of a movable plate 4 is partitioned into a narrow-width part 17 and a wide-width part 18 by a slim hole 19. The movable plate 4 is assembled to a fixed conductor 2 with columns 9 of an insulator 3, a bimetal 5 is assembled to the movable plate 4, the entire configuration is pressed down by a resinous block 6, and the entire fixing part is fixed by melting tips of the columns 9. The wide-width part 18 serves as a normal movable plate, whereas the narrow-width part 17 serves as a conductor in a normal state and as a resistor against an overcurrent.

Abstract: An overload release is disclosed, in particular for a circuit breaker, including a metal strip which is made of at least two different types of metal and around which a heat conductor is wound, wherein an electrical insulator is arranged between the metal strip and the heat conductor. In an embodiment, the heat conductor is welded onto the metal strip by way of arc welding.

Abstract: The present invention relates to an external operation thermal protector incorporating two thermal plates, each having a first resistance element module having a first polymer PTC element and a second resistance element module having a second polymer PTC element fixed to a body casing together with the fixed end of a movable plate interlocked with a bimetal and a second terminal. Two gaps for absorbing the volume expansion caused when each polymer PTC element generates heat are provided between the plates and the inner walls of the body casing. The current for an external load between a first terminal and the second terminal is interrupted by externally energizing the second terminal and a second connection unit, the current interruption is self-sustained.

Abstract: A self-hold type thermal protector according to the present invention includes a movable contact of a movable plate rises and separates from a fixed contact when a bimetal of the thermal protector inversely warps at a predetermined temperature, an electric current between the contacts, namely, an electric current between a movable contact side terminal and a fixed contact side terminal is disrupted, and the disrupted current flows into the polymer PTC element, which is then made to produce heat and is thermally expanded to increase a resistance value. A second terminal member on a side opposite to a first terminal member where the polymer PTC element is positioned and fixed forms a bowing part, and a gap h is formed between an upper inner wall of a housing and the upper surface of the second terminal member.

Abstract: A thermally responsive switch includes a hermetic container including a housing and a header plate hermetically secured to an open end of the housing, a conductive terminal pin inserted through the header plate, a conductive pin, a thermally responsive plate having one of two ends fixed to the terminal pin, a movable contact secured to the other end of the thermally responsive plate, and a fixed contact fixed via an electrical conductor to the terminal pin, the conductor having a fuse part and a heater. The fixed contact is fixed to a ceramic member disposed between the container and the fixed contact. The housing includes a bottom surface including both lengthwise ends between which the conductive pin is interposed. Both ends of the housing bottom surface are deformed axially relative to the conductive pin from an initial state, so that an operating temperature of the switch is calibratable.

Abstract: Embodiments relate to an external operation thermal protector incorporating a polymer PTC element that is operable in a safe state in which a hot spot does not occur even under volume expansion due to thermal expansion at the time of heat generation. A terminal plate of a resistance element module having a polymer PTC element is caulked above a column and fixed to a body casing together with the fixed end of a movable plate interlocked with a bimetal and a second terminal. Another terminal plate of the resistance element module is arranged with a gap, for absorbing the volume expansion caused when the polymer PTC element generates heat, with respect to the inner wall of the body casing. The current for an external load between a first terminal and the second terminal is interrupted by externally energizing the second terminal and a third terminal.

Abstract: A miniature safety switch is used in motor vehicle electronics. The miniature safety switch has a housing base, from which a fixed contact arm and a bimetallic contact arm, which has a moving contact and a bimetallic snap disk attached thereto, are led out. A PTC resistor is brought into direct contact with the bimetallic snap disk by a compression spring and is electrically integrated in such a way that, as a result of the heat generated by the PTC resistor, the bimetallic snap disk remains in the open position thereof in the event of triggering.

Abstract: A self-holding type thermal protector, wherein a movable contact of a movable plate rises and separates from a fixed contact when a bimetal of the thermal protector inversely warps at a predetermined temperature, an electric current between the contacts, namely, an electric current between a movable contact side terminal and a fixed contact side terminal is disrupted, and the disrupted current flows into the polymer PTC, which is then made to produce heat and is thermally expanded to increase a resistance value. A second terminal member on a side opposite to a first terminal member where the polymer PTC is positioned and fixed forms a bowing part, and a gap is formed between an upper inner wall of a housing and the second terminal member.

Abstract: A temperature control switch comprises a switch casing, which contains a springy slice, where the springy slice is provided with a thermostatic bimetal strip on its bouncing end. The thermostatic bimetal strip is provided with an electric heating device, where the first end and second end of the device are respectively connected in series between a first control terminal and the thermostatic bimetal strip. The elevated end of the thermostatic bimetal strip links one end of an uplifted metal slice to form an incompletely fixed link point, while the other end of the uplifted metal slice features a swaying contact, which corresponds to the contact point that a second control terminal joins. When subjected to heat, the one end of the thermostatic bimetal strip deforms, enabling the swaying contact to separate from the contact point, thus preventing the contact point from being damaged by the heat.

Abstract: A thermostat has a movable place where a spring point and a securing plate portion are integrally formed. The spring point is provided with a movable contact at a position that faces a fixed contact, a protrusion with which a bimetal that counter turns comes into contact, a hole for inserting the head of a bimetal holding point, and a protrusion for holding the bimetal, and the spring point is valley-folded at a folding point so as to face the securing plate portion. The securing plate portion is integrally constituted of a terminal point connected to one external terminal, a fixation point for securing an insulating plate, which has the fixed contact in a manner to hold the plate from both sides, and a holding point folded and set up, penetrating a central hole of the bimetal to hold the bimetal.

Abstract: A concealed adjustable temperature switch includes a fixed plate, an adjusting block threadedly engaged with a screw hole of the fixed plate, a bimetal plate, and a metal plate. Mounted on the adjusting block are upper and lower positioning rings and a fixing ring between the positioning rings. The fixed ring includes a hole through which the adjusting block extends. The fixing ring includes a stop projecting toward the fixed plate. The stop includes two sides having a height greater than a thickness of the fixed plate. A distance between the stop and a center of the hole of the fixing ring is greater than that between a front edge of the fixed plate and a center of the screw hole of the fixed plate and than that between either one of two sides of the fixed plate to the center of the screw hole of the fixed plate.

Abstract: A motor protector (10) is shown having an elongated generally cup-shaped metallic housing (12) formed by a top wall (12a) and a side wall (12b) extending down from the perimeter of the top walls, the free end of which is welded to a header (14). The side and top wall have a rounded junction (12c) and a calibration rill (12e) is formed in the top wall from one end of the housing and through the rounded junction. An elongated thermostatic disc (16) is mounted in the housing and has a movable electrical contact (20) mounted at one end to be movable into and out of engagement with a stationary electrical contact (34) that is in turn mounted on a heater (26). A ceramic insulator plate (32) is interposed between the heater and the header.

Abstract: A protector (10) particularly useful for wye-connected three phase electrical motors has a header (12) mounting first and second terminal pins (14) to which L-shaped pin heaters (16) are mounted along with stationary electrical contacts (16b). A generally U-shaped heater and support member (18) has two leg ends welded to the header intermediate to the terminal pins and a snap acting thermostatic disc (20a) is welded through a weld slug to the central portion of the heater and support member. First and second movable electrical contacts (20b) are mounted on the bottom surface of the thermostatic disc positioned to move into and out of engagement with respective stationary contacts upon snapping of the thermostatic disc from one dished configuration to an opposite dished configuration in dependence on temperature of the disc.

Abstract: A protector (1) has a metal header (30) that mounts a first terminal (31) and a second terminal (32) electrically isolated from one another. A metallic housing (10) is fixed to the header (30) and forms a chamber. A stationary contact (40) is electrically connected to the first terminal (31), a heater (50) is electrically connected between the second terminal (32) and the header (30), and an arm assembly (60) is arranged inside the chamber, with an end thereof being fixed to the housing. The arm assembly (60) includes an electrically conductive movable plate (70) having a movable contact (77) engageable with the stationary contact (40), a thermally responsive member (80) arranged at a position where it lies over or under the movable plate (70) and an electrically conductive weld slug (90) that fixes the movable plate (70) and the thermally responsive member (80) to the housing (10).

Abstract: An adjustable bimetal snap disc thermostat is disclosed which provides conventional resistance-type heaters symmetrically positioned adjacent one side of the snap disc to allow adjustment of the operating temperature of the thermostat. The heaters are supported in accurate, very close proximity to the bimetal snap disc to ensure excellent heat transfer thereto. Additionally, the volume of the chamber within which the heaters are supported is reduced by a bridge portion which also serves to further reinforce the outer housing walls. Additionally, guide surfaces for the heater terminals are provided to facilitate assembly.

Abstract: A cooling enhancement device causes rapid cooling of an item placed within a cooling unit. The device includes a temperature simulating arrangement (e.g., including a heat generating element adjacent a temperature sensor of the cooling unit) to simulate an artificial temperature within the cooling unit. In one example, the device includes a control system connected to control the operation of the temperature simulating arrangement. The device also includes a setting component to provide user control. In one example, the setting component is connected to communicate a rapid cooling setting input by the user to the control system.

Abstract: A switching device includes a strip-shaped actuator element including a shape memory alloy, which is connected to a movable contact part of a switching contact. It is intended that an at least largely extended shape has been impressed into the actuator element at an annealing temperature. It is intended that, in the operating state in which the switching function is not triggered, the element rests on a deflecting element with frictional engagement in such a way that the deflecting element exerts, on the concave inner side of the actuator element, a counterforce partially counteracting the curving of the latter in this state.

Abstract: A hermetic compressor is disclosed having an electric motor, a compressor unit, and an overload protector within a hermetically sealed housing. The overload protector includes a thermally activated switching device for selectively providing current to the electric motor, a heater element thermally coupled to the switching device, and a control circuit controlling the heater element. The overload protector allows the disconnection of power to the motor due to factors and conditions specified in the remotely located control circuit.

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.

Abstract: An RF-MEMS device includes a substrate, a coplanar line arranged on the substrate, a movable element disposed above the coplanar line, and a movable electrode arranged on the movable element so as to face the coplanar line. The movable element includes a high-resistivity semiconductor functioning as an insulator for an RF signal and functioning as an electrode for a low-frequency signal and a DC signal. Electrostatic attraction caused by a DC voltage applied between the movable element functioning as the electrode and a fixed electrode displaces the movable element towards the fixed electrode, thereby varying the capacitance between the movable electrode and the coplanar line. The movable element made of a high-resistivity semiconductor has dielectric loss characteristics in which the dielectric loss decreases as the frequency of a signal increases, thus readily reducing the dielectric loss of an RF signal.

Abstract: An adjustable bimetal snap disc thermostat is disclosed which provides conventional resistance-type heaters symmetrically positioned adjacent one side of the snap disc to allow adjustment of the operating temperature of the thermostat. The heaters are supported in accurate, very close proximity to the bimetal snap disc to ensure excellent heat transfer thereto. Additionally, the volume of the chamber within which the heaters are supported is reduced by a bridge portion which also serves to further reinforce the outer housing walls. Additionally, guide surfaces for the heater terminals are provided to facilitate assembly.

Abstract: A first contact portion 10a is projectingly provided at a part of a first terminal 10 in the direction so as to intersect a bimetal plate 90, and a second contact portion 20a is projectingly provided at a part of a second terminal 20 so as to be opposed to the first contact portion 10a. A heat generating resistor 30 is interposed between the first contact portion 10a and the second contact portion 20a so that electrodes on one end face and the other end face of the heat generating resistor 30 are in contact with the first contact portion 10a and the second contact portion 20a, respectively.

Abstract: A hermetic compressor is disclosed having an electric motor, a compressor unit, and an overload protector within a hermetically sealed housing. The overload protector includes a thermally activated switching device for selectively providing current to the electric motor, a heater element thermally coupled to the switching device, and a control circuit controlling the heater element. The overload protector allows the disconnection of power to the motor due to factors and conditions specified in the remotely located control circuit.

Abstract: A current interrupter (10, 10′) includes bimetallic member (18) as a switching member having a formed portion (18a) providing snap action movement between oppositely dished configurations. An integrally formed extended length portion (18b) having a stiffening feature extends from the formed portion and mounts a movable contact at its free end. Stiffening feature embodiments include folded opposed marginal edges and one or more longitudinally extending ribs formed in the extended length portion. In one embodiment, the bimetallic member is cantilever mounted in a housing member (14). In another embodiment, a bimetallic member (18D) has first and second extended length portions (18b) extending from opposite sides of a formed portion to provide a circuit interrupter with a double break system.

Abstract: A device is described for latching an actuator to a substrate where the substrate includes a thermally activated material located on the substrate and a heater capable of heating the thermally activated material until it softens. The actuator includes a contact area that is spaced above the thermally activated material in a non-contact position. The actuator is movable from the non-contact position to a contact position where the contact area contacts the thermally activated material of the substrate. A method of latching actuator is also provided including heating the thermally activated material until it softens and moving an actuator into the contact position.

Abstract: A thermally sensitive, overheat protection control for a thick film electric heater comprises a bimetallic actuator (68) arranged for making good thermal contact with the heater, and a moveable electrical contact (78) for engagement with a contact provided on the heater. The moveable contact (78) is operatively coupled to the bimetallic actuator (68) such that in use upon operation of the actuator, it moves out of engagement with the heater contact to interrupt the electrical supply to the heater. The bimetallic actuator (68) and the moveable contact are mounted on a common generally U-shaped leaf spring (66) which acts in use resiliently to bias the actuator (68) into thermal contact with the heater and the moveable contact (78) into electrical contact therewith. The control also comprises a creep action bimetallic actuator (110) mounting a contact at one end, the actuator acting as a thermostatic control for the heater.

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.

Abstract: A first contact portion 10a is projectingly provided at a part of a first terminal 10 in the direction so as to intersect a bimetal plate 90, and a second contact portion 20a is projectingly provided at a part of a second terminal 20 so as to be opposed to the first contact portion 10a. A heat generating resistor 30 is interposed between the first contact portion 10a and the second contact portion 20a so that electrodes on one end face and the other end face of the heat generating resistor 30 are in contact with the first contact portion 10a and the second contact portion 20a, respectively.

Abstract: A switch 10 has an insulating support 16 on which a first and a second external terminal 11, 14 are arranged, and a temperature-dependent switching mechanism 19 that, as a function of its temperature, makes between the first and the second external terminal 11, 14 an electrically conductive connection for an electrical current to be conducted through the switch 10, and having a switching member 22 that changes its geometric shape in temperature-dependent fashion between a closed position and an open position and in its closed position carries the current. An actuating member is connected electrically and mechanically in series with the switching member 22. The first external terminal 11 is connected to a planar cover electrode 12, to which the actuating member is fastened with its first end 25. The cover electrode 12 has on its inner side 32 a flat self-hold resistor that is electrically connected between the cover electrode 12 and the second external terminal 14.

Abstract: The invention relates to a thermally controlled, electrical switching device 1, which displays a bimetal element 2, an adjustment apparatus 3, and a switch-contact apparatus 6, which, on the one hand, can be adjusted by means of the bimetal element, and on the other hand, with respect to its switching point, works in conjunction with the adjustment apparatus 3. The fixed end 7 of the bimetal element 2, a fastening end 8 of the switch-contact apparatus 6, a support element 9 for the adjustment apparatus 3, and connection contact lugs 10, 11 are arranged on a carrier device 12. In order to improves the switching device 1 with respect to its mechanical characteristics and with respect to the necessary individual parts, the carrier device 12 consists of a single-piece holding block 13, formed of insulating material, with a number of essentially parallel-running reception slots 14, into which can be inserted the individual parts held by the carrier device 12, i.e.

Abstract: A temperature-dependent switch 10 has a temperature-dependent switching mechanism 11; a housing 12, receiving the switching mechanism 11 and having a lower part 14 and an upper part 15; and two stationary contacts 31, 32, provided on the upper part 15 on its inner side 37, each contact being connected to an associated external termina 35, 36. A current transfer member is arranged on the switching mechanism 11 and moved by it, which transfer member is in contact with the two stationary contacts 31, 32 in temperature-dependent fashion. There is arranged physically in the region of the current transfer member and upper part 15 at least one resistor 38 which is electrically connected between the stationary contacts 31, 32 at least when the current transfer member is in contact with them.

Abstract: A temperature-dependent switch has two connection electrodes mounted on an insulating support as well as a switching mechanism that, as a function of its temperature, creates an electrically conductive connection between the two connection electrodes. Also provided is a resistance element that is connected to the two connection electrodes electrically parallel to the switching mechanism and is inserted into the insulating support perpendicular to the connection electrodes, so that it sits inside the insulating support and is retained by it.

Abstract: A temperature-dependent switch 10 has two connection electrodes 12, 13 mounted on an insulating support 11 as well as a switching mechanism 27 that, as a function of its temperature, makes an electrically conductive connection between the two connection electrodes 12, 13. A resistance element 19 is connected to the two connection electrodes 12, 13 electrically parallel to the switching mechanism 27 and sits on the outside of the insulating support 11 and is retained by it.

Abstract: A bimetal 40 is secured at a holding portion 40b to a fixed pin 52 and a snap portion 40a is supported by a support portion 12a. The free end 40a" of the snap portion 40a comes in contact with a movable contact plate 30 to thereby rock the plate 30. The displacement of the snap portion 40a is restricted at a boundary end portion 40a' by the holding portion 40b. Due to this, when the thermal protector carries out a snap action (or is reversed), the snap portion 40a is rocked like a lever around the support portion 12a supporting the snap portion 40a, and the free end 40a" of the snap portion 40a is greatly displaced. Thus, the travelling distance by which the movable contact 32 travels when the movable contact plate 30 is rocked, can be increased. This can prevent a delay in snap.

Abstract: A motor starting device (1) has a thermostatic element (14) of a first switch circuit (11), a first resistive heater (13) serially connected to the first switch circuit, a thermostatic element (22) of a second switch circuit (21) and a second resistive heater (23) serially connected to the second switch circuit. The thermostatic element (22) of the second switch circuit is heated by both the first and second resistive heaters and, after actuation, is closer to the first resistive heater (13), thereby bringing the second switch circuit (23) into a de-energized state. When the second switch circuit (21) and the second resistive heater (23) are employed in the motor starting device, it becomes possible to provide a large electric current to the start winding during the start-up phase and to make the electric current that flows to the start winding zero after the start-up phase.

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.

Abstract: An overheat and overload sensing device includes a thermal sensor (such as a thermal regulator) and a breaker connected in parallel and used to cut off a power supply in case of current overload. The thermal sensor usually disposed near a heat source can respond automatically to cut off a local circuit in time in the case of overheat that will make the breaker become overloaded to break off power supply.

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.

Abstract: A thermostat includes a case, including an exterior, that is made of conductive material. A cover plate is made of a conductive material. The cover plate is connected to the case to define a sealed interior. The cover plate has a contact projecting into the sealed interior. The contact is fixed with respect to the case and has an interior contact position. An insulator sheet is disposed between the case and the cover plate. A blade is disposed in the sealed interior. A second end of the blade moves between a first position where it abuts the contact position of the contact and a second position where it is spaced from the interior contact position of the contact. A resistor is mounted on a first end of the blade. The resistor is disposed between the cover plate and the blade in the sealed interior of the case. The resistor has a first side facing and abutting the cover plate, and a second side facing and abutting the blade so that the resistor is electrically connected between the cover plate and the blade.

Abstract: A temperature-dependent switch has a temperature-dependent switching mechanism and a housing, receiving the switching mechanism, that has a lower part and an upper part made of insulating material. On the inner side of the upper part there are two stationary contacts, each of which is connected to an external terminal associated with it. A current transfer member is moved by the switching mechanism, which electrically connects the two stationary contacts to one another as a function of temperature. A cavity, into which project two contact surfaces which are each connected to one of the stationary contacts, is located in the upper part.

Abstract: A thermostat includes a case having a sealed interior and an exterior. A contact extends from the sealed interior to the exterior. The contact is fixed with respect to the casing and has an interior contact position. A first blade extends from the sealed interior to the exterior and has an interior end. The interior end of the first blade moves between a first position where the interior end of first blade contacts the interior contact position of the contact and a second position where the interior end of the first blade is spaced from the contact position end of the contact. A separator is disposed between the first blade and the contact in the interior of the case. The separator is made of an insulating material. The separator has a first side facing the contact and a second side facing the first blade. A first conductive contact pad is disposed on the first side of the separator. A second conductive contact pad is disposed on the second side of the separator.

Abstract: A switch for opening and closing an electrical circuit comprises a temperature-dependent switching mechanism and a housing containing a switching mechanism. The housing has an electrically conductive lower housing part and an electrically conductive cover part electrically insulated from and closing off the lower housing part. The electrical circuit is to be connected to the lower housing part and the cover part. As a function of temperature the switching mechanism electrically connects the lower housing part to the cover part. At least one resistor is provided directly on an inner surface of the housing such that the resistor is switched in series with the switching mechanism between the cover part and lower housing part, as a function of temperature, when the switching mechanism is in a first switch position.

Abstract: A temperature controller comprises a bimetallic switching mechanism that switches in response to a predetermined temperature, a lower housing part receiving the switching mechanism, a cover part closing off the lower housing part, and a substantially inert film that is arranged between the lower housing part and the cover part. The substantially inert film comprises a polyimide. The film comprises a mechanical seal between the lower housing part and the cover part.

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).

Abstract: A temperature-dependent switch comprises a temperature-dependent switching mechanism having an electrically conductive spring element carrying a movable contact element. A first counter-contact is provided that coacts with said movable contact element to constitute a first switching contact pair that is opened and closed as a function of the temperature of the switching mechanism. A first heating resistor is provided for influencing the temperature of the switching mechanism at least in one switching state of the latter. The first heating resistor is provided on the movable contact element.

Abstract: A component for a demagnetization circuit includes a thermistor with positive temperature characteristic having a first electrode and a second electrode, another thermistor with negative temperature characteristic having a third electrode and a fourth electrode and being disposed such that the first and third electrodes are opposite to each other, a heat-sensitive switch disposed between these two thermistors, a case which contains the thermistors and a heat-sensitive switch, and terminals which extend outward from inside the case.

Abstract: A temperature controller 10 comprises a bimetallic switching device 35 which switches at an excess temperature to protect an electrical device. The bimetallic switching device is accommodated in a housing 12 which has an electrically conductive base and an electrically conductive cover to close this. The cover and the base are connected by an insulation. A first electrical component 17 is connected in series between terminals of the temperature controller at least when the bimetallic switching device is open. A second electrical component 25 being arranged on the bottom of the base is also provided for the bimetallic switching device. The second electrical component 25 is connected in series with the bimetallic switching device 35 between the terminals 37, 39 of the temperature controller 35 at least when the bimetallic switching device 35 is closed. The first electrical component is a he a ting resistor R.sub.H or an insulator 41 with a comparable mechanical construction.

Abstract: A temperature controller 10 with a bimetallic switching device comprising a bimetallic disk and current-carrying spring disk 22, displaying a first heating resistor assigned to the bi-metallic switching device which has the effect of a self-locking function when the bimetallic switching device is actuated. The bimetallic switching device is assigned a second heating resistor which switches the bimetallic switching device when the current flowing through the temperature controller 10 becomes too high to protect a consumer against excess current. The bimetallic switching device is hereby provided as change-over switch and is connected to both heating resistors 53, 54 in such a way that in each of its switch positions is takes over the current flowing through the temperature 10 controller via a current-carrying part 22.

Abstract: A temperature controller (10) having bimetallic switching device (15) which switches at an excess temperature and a heating resistor (23) in the same circuit as this which has the effect of a self-locking function. The heating resistor (23) is designed on a film (22) which is provided for thermal and/or electrical insulation.

Abstract: An overload protective apparatus has fixed contacts connected to at least one pair of fixed terminals secured on the bottom of a case, a dish-shaped polymetallic element, e.g., a bimetal or trimetal having movable contacts bonded thereon so as to oppose the fixed contacts, and an adjusting bolt supporting a central portion of the polymetallic element for maintaining the polymetallic element at a position separate from the bottom of the case, wherein the polymetallic element and the adjusting bolt are accommodated in the case. The polymetallic element used herein is constructed to make a current density around bonding portions for the movable contacts higher than other regions, such that portions around the movable contacts are more susceptible to rupture when an abnormal current flows through the polymetallic element. The polymetallic element is also constructed to prevent degradation of the spring constant thereof.