Abstract: The breaker is provided with a fixed contact, a movable piece having an elastic portion and a movable contact, a thermally-actuated element deforming with a change in the temperature so as to shift the movable piece from a conduction state to a cut-off state, a case main body housing the movable piece and the thermally-actuated element, a lid member attached to the case main body, and a plate-shaped cover piece embedded in the lid member. The case main body is provided with a first fixing surface fixed to the lid member, and the lid member is provided with a second fixing surface fixed to the case main body. The second fixing surface is provided with a protruding portion protruding toward the first fixing surface, and the protruding portion and the cover piece are overlapped with each other in the plan view as viewed in the thickness direction of the cover piece.

Abstract: An apparatus including a first electrical connector; and a second electrical connector. The first and second electrical connectors have magnets to provide a magnetic holding force with each other and provide alignment of the electrical connectors to hold the second electrical connector against the first electrical connector at a predetermined position. Magnetic poles of the magnets are configured to limit orientation of the second electrical connector on the first electrical connector. The second electrical connector includes two power contacts and an interruption detector contact, where the power contacts are movably mounted on the second housing and configured to disconnect from electrical contacts of the first electrical connector, when the second electrical connector is being disconnected from the first electrical connector, only after the interruption detector contact of the second plurality of electrical contacts disconnects from an electrical contact of the first electrical connector.

Abstract: A breaker (1) is provided with: a fixed piece (2) which has a fixed contact; a movable piece which has a movable contact at a front end portion and pushes the movable contact against the fixed contact to bring same into contact with each other; a thermally responsive element that deforms in accordance with a change in temperature and thereby actuates the movable piece so that the movable contact separates from the fixed contact; and a case body (71) of a resin case that accommodates the fixed piece (2), the movable piece, and the thermally responsive element. The case body (71) has recess portions (75, 77) which are recessed from a peripheral portion, and the fixed piece (2) has a withdrawal portion (25) that withdraws from the recess portions (75, 77) of the case body (71) by a predetermined first distance (D1) or more, and is embedded in the case body (71).

Abstract: A protection element is provided which is capable of stably retaining a flux on a soluble conductor at a predetermined position, enabling a speedy and precise blowout of the soluble conductor in the event of an abnormality. This protection element includes: a soluble conductor 13 which is disposed on an insulation baseboard 11 and is connected to a power supply path of a device targeted to be protected, to cause a blowout by means of a predetermined abnormal electric power; a flux 19 which is coated onto a surface of the soluble conductor 13; and an insulation cover 14 which is mounted on the baseboard 11 with the soluble conductor 13 being covered therewith. In addition, the protection element is provided with a protrusive stripe portion 20 which is formed on an interior face of the insulation cover 14 in opposite to the soluble conductor 13 and in which a stepped portion 20a for retaining the flux 19 is formed at a predetermined position while in contact with the flux 19.

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 protection element and a secondary battery device employing the protection element are provided for stably retaining a flux on a soluble conductor at a predetermined position, so as to enable appropriate blowout of the soluble conductor in the event of an abnormality. The protection element has a soluble conductor which is disposed on an insulation baseboard, and which is connected to a power supply path of a device targeted to be protected, and which causes a blowout when a predetermined abnormal electric power amount is supplied. A flux is coated on a surface of the soluble conductor, and an insulation cover member is mounted on the baseboard and covers the soluble conductor. The protection element also includes a stepped portion for retaining the flux at a predetermined position in contact with the flux, and the stepped portion is formed opposite to the soluble conductor on an interior face of the insulation cover member.

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 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 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 h is formed between an upper inner wall of a housing and the second terminal member.

Abstract: A temperature sensor for a radiant heater has a first tubular expansion element which is connected to its housing and contains a second rod-like expansion element, the two expansion elements having different coefficients of thermal expansion. The temperature sensor has two switching springs for different switching points. In order to adjust a second switching spring, which is fastened to a second switching spring base, the second switching spring base can be moved in the longitudinal direction of the rod and is then permanently fixed by bending or welding.

Abstract: A trip device is disclosed, the device comprising: a power source side heater connected to a power source side of a molded case circuit breaker (MCCB) to receive current; a load side heater connected to a load side of the MCCB to receive the current; and a bimetal including a direct heat unit contacting the power source side heater and an indirect heating unit facing the power source side heater, wherein the bimetal is partially fixed between the power source side heater and the load side heater and is curved when over-current or short-circuited current flows in the MCCB.

Abstract: An appliance assembly includes an appliance and an appliance member. The appliance includes a wall defining a plurality of holes. The appliance member is carried by the appliance. The appliance member includes a housing which includes a snap-fit arrangement coupled with the appliance. The snap-fit arrangement includes a first plurality of ears and a second plurality of ears, the first and second plurality of ears snap-fittingly engaging the plurality of holes.

Abstract: The micro-electromechanical (MEMS) actuator comprises a hot arm member and a cold arm member. The cold arm member comprises at least two longitudinally spaced-apart flexors. The actuators may also be constructed with at least one among the hot arm member and the cold arm member comprising at least one spring section. The stress in this improved MEMS actuator is more uniformly distributed, thereby reducing the mechanical creep and improving its reliability as well as its operation life.

Abstract: An electrical switching device includes a housing, a base attached to the housing, two non-actuated electrical contacts supported in the housing, and an actuator assembly contained within the housing. The actuator assembly includes a movable contact for engaging the non-actuated electrical contact and a wire element formed of a shape memory alloy. Applying an electric current to the wire element causes the actuator to either pivot or rotate the movable contact to either engage or disengage the non-actuated electrical contacts.

Abstract: 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: An overheating protection device id disclosed for electrically coupling an electrical power source to a fluid propulsion device. The fluid propulsion device includes a propelling member within a manifold for pressurizing a fluid. The propelling member is keyed with a motor. The overheating protection device comprises a housing including a back plate, a top plate, a bottom plate, a first side plate and a second side plate for defining a cavity. The back plate, the top plate, the bottom plate, the first side plate and the second side plate define an aperture. A thermostat switch is positioned within the cavity and is electrically coupled between the electrical power source and the motor. A cover engages the aperture for sealing the thermostat switch within the housing. The cover includes a bore for relieving the thermostat switch. A thermo-conductive layer has an interior surface and an exterior surface.

Abstract: A temperature sensor for radiant heating units with a heating coil disposed in a cup includes a tube with a first end connected to a housing of a switch with a movable contact cooperating with stationery contacts in the housing. A two-section rod, which extends into the housing of the switch and operates the movable contact, is supported inside the tube. The tube and the rod have different thermal expansion coefficients. To prevent a shift in the switching point, the section of the rod that operates the contact terminates outside the hollow space of the cup, and the temperature-induced length changes of this section and of the housing are matched to each other.

Abstract: A thermal switch apparatus having an adapter mount that snaps to a modular thermal switch by hand or with the use of a simple tool. The thermal switch apparatus of the invention is embodied as a thermal switch apparatus including an adapter having a mounting apparatus and a receptacle, the receptacle having a female portion structured internally with a retainer. A modular thermal sensing device includes a male portion sized to enter the female portion of the receptacle, the male portion having an external relief structured to interlock with the internal retainer of the female portion. The male portion of the modular thermal sensing device is installed into the female portion of the receptacle, the retainer of the receptacle being mated with the external relief of the modular thermal sensing device.

Abstract: A protective device fitted to an electromagnetic coil to prevent damage to a thermal protective switch installed in the electromagnetic coil beneath the winding. In a preferred embodiment there is a subsequent encapsulation process following manufacture of the coil. Preferably, said device comprises a protective cap shaped to conform with the shape of the thermal switch and closely fitting the thermal switch and wiring connected thereto.

Abstract: A switch head is disclosed that can be attached to a temperature sensor having elongated expansion elements with different thermal expansion coefficients. The switch head further includes a device for measuring the displacement of the expansion elements relative to each other. Attachment means are provided for attaching at least one additional switch head. At least one opening for receiving a transfer member to transfer the relative displacement of the expansion elements to the at least one additional switch head is provided.

Abstract: A plug or grommet fits into the opening in the back plate of a thermostat and blocks or diverts intrusion air from entering the interior of the thermostat housing from the wall penetration for the thermostat wires. The thermostat wires are fed through the grommet, which is a soft rubbery material that closes over the wires and blocks the intrusion air. Alternatively, a wall plate can be used between the back plate of the thermostat and the wall where the thermostat is mounted.

Abstract: An electrical functional device for use in the field of aviation, for example, a safety switch, is described. The functional device has a housing out of which a cylindrical fixing neck projects. The fixing neck contains, on an outer circumference thereof, a fine-pitch threading for screwing on a nut, and carries, at a distance from the end thereof that is attached to the housing, a radially protruding bearing flange. The bearing flange serves to hold the device in a fixed position, in which the fixing neck projects through a fastening hole of a wall element and is held therein against the bearing flange by a nut. The fixing neck is a one-piece part made out of plastic. It contains, between the end of the threading thereof and the bearing flange, an unthreaded shaft area, which is coaxial in relation to the fixing neck.

Abstract: A switch head is disclosed that can be attached to a temperature sensor having elongated expansion elements with different thermal expansion coefficients. The switch head further includes a device for measuring the displacement of the expansion elements relative to each other. Attachment means are provided for attaching at least one additional switch head. At least one opening for receiving a transfer member to transfer the relative displacement of the expansion elements to the at least one additional switch head is provided.

Abstract: According to the invention a switching device (11) for an electric heating device is provided with a rod-shaped temperature sensor (15) formed by a ceramic rod (17) and an extension tube (16). The temperature sensor (16) operates a snap-action switch (22) located in a base (12) by means of an actuator separate from the said switch, which has at least one actuating part (41), which is loaded in the actuating direction by a leaf spring (34), the actuating part (41) and leaf spring (34) being in one piece. In a further development of the invention the leaf spring (34) or actuating part (41) can be a receptacle for an adjusting device, preferably an adjusting screw (38).

Abstract: A temperature actuated switch having a resilient switch blade that is movable between open and closed positions and extends perpendicular to an elongated actuator of shape memory alloy. The actuator has an elongated deformed shape at normal temperatures and a contracted recovered shape at an elevated temperature. An end portion of the actuator is attached to the switch blade to provide movement of same between open and closed positions as the actuator changes between its deformed and recovered shapes.

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: The present invention provides preferably one or optionally two printed circuit boards that project from supports on a single cover plate into the wall opening formed preferably for a standard 3.5 inch by 2 1/16 inch junction or outlet box. Screw holes are provided in the cover plate to match the standard screw holes in the single junction box and a high degree of functionality is provided in the programmable thermostat via the components on the printed circuit board such that the printed circuit boards are about only as long as the distance between those screw holes and still fit within the width of the single junction box.

Abstract: A thermostat that includes a subbase having a back surface designed to be mounted conformal with a surface and an inner surface that has a portion of selected electrical components mounted thereon, including a first electrical communication device. The subbase has first mechanical connectors formed integral therewith. A cover that has a front surface designed to carry selected components for communication with an operator and an inner surface that has a portion of selected electrical component supported thereby, including a second electrical communication device. The inner surface has second mechanical connectors formed integral therewith. During installation, the cover is brought into registry with the subbase to form a thermostat housing that has a reduced profile and that substantially encloses the electrical components of the thermostat.

Abstract: An electric switchgear having at least one switching element that is a semiconductor with a temperature-dependent resistance, which includes a housing joined together from a metal cap and a closing element made of plastic. Contact tabs of the switching element are inserted into recesses of the closing element, and the metal cap and the closing element are connected with one another by a joining element made of plastic which is cast on on the outside and which surrounds the edge of the metal cap and surrounds the closing element at least partially.

Abstract: A base (1) provided with movable and mechanically loaded operational parts has a planar, plate-like base body (3), to which are fixed support bodies (5 to 9) located on an assembly side (4) with plate-like connecting parts (17, 18) exclusively by means of adhesive connections (10), such as melted joints, so as to be closely engaging and correctly operationally positioned. This construction is suitable for numerous switching, control and regulating devices and permits simple manufacture, low weight, high strength, good accessibility and high operational reliability.

Abstract: A thermal cutoff is mounted adjacent a bleed opening in a hot air duct. Hot air flowing through the bleed opening mixes with ambient air before contacting the thermal cutoff. If a predetermined air temperature is exceeded, the thermal cutoff operates, and de-energizes the air heater.

Abstract: An expansion box heat regulator for an electric cooker, using a switch housing containing both a control circuit snap switch and a mains switch in respective recesses in the housing, and permitting the switch terminals to be mounted on the housing to extend therefrom on each lateral side of the expansion box parallel with the axis of the box, thus providing a low-profile structure requiring minimal installation dimension in the axial direction of the expansion box.

Abstract: A fire sensing device for actuating associated fire alarm system having a heat receiving plate member of improved heat receiving efficiency for rapidly transmitting any abnormal heat received from environmental atmosphere to a heat-responsive switching means thermally connected to the plate member to actuate the alarm system promptly and reliably is provided. In order to enlarge surface area, the heat receiving plate member has many fins comprising elongated bridging parts defined by adjacent ones of many parallel slits made in the plate member and twisted about elongated axis preferably by an angle of 40.degree. to 60.degree. with respect to the plane of the plate member so as to be raised at both longitudinal edges from the member on its both sides, whereby abnormally heated air passing along a surface or surfaces of the plate member is caused to flow along the fins through or into the slits to rapidly and efficiently transmit its heat to the plate member.