Abstract: A thermally responsive switch includes a container including a metal housing and a header plate, at least one conductive terminal pin inserted through a hole of the header plate, a fixed contact fixed to the terminal pin, a thermally responsive plate having one of two ends conductively connected via a support to an inner surface of the container and reversing a direction of curvature at a predetermined temperature, and at least one movable contact electrically conductively secured directly to the other end of the thermally responsive plate. Each contact is comprised of a silver-cadmium oxide system contact. The container is filled with a gas containing helium ranging from 50% to 95% so that an internal pressure of the container ranges from 0.38 atmosphere to 0.68 atmosphere at room temperature such that arc generated during opening of the contacts moves on surfaces of the contacts without spreading from the contacts.

Abstract: A thermally responsive switch includes a hermetically sealed container including a metal housing and a header plate, at least one conductive terminal pin hermetically fixed in a through hole, a fixed contact fixed-to the terminal pin in the container, a thermally responsive plate having one end connected via a support to an inner surface of the container and reversing a curvature direction at a predetermined temperature, and at least one movable contact electrically conductively secured to the other end of the thermally responsive plate. Each contact includes a silver-tin oxide-indium oxide system contact. The container is filled with a gas containing helium ranging from 50% to 95% so that an internal pressure of the container ranges from 0.3 to 0.6 atmosphere at room temperature.

Abstract: A thermally responsive switch includes an airtight container including a metal housing and a header plate, conductive terminal pins airtightly fixed to the header plate, a fixed contact fixed to the conductive terminal pin, a thermally responsive plate one end of which is conductively connected to and fixed to the inner surface of the airtight container and the bending direction of which is reversed at a predetermined temperature, and a movable contact fixed to the other end of the thermally responsive plate. In the thermally responsive switch, the movable contact and the fixed contact are composed of a silver tin oxide based contact and gas containing 50% or more and 95% or less of helium is encapsulated in the airtight container in such a manner that gas pressure is equal to or more than 0.35 and equal to or less than 0.7 at ordinary temperature.

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: A protector for a three-phase electric motor has a container with a housing and a metal plate secured thereto. A protrusion is provided in the housing. Three conductive terminal pins, each with a fixed contact, protrude into the housing through the metal plate. A thermally responsive plate is connected to the three moveable contacts. The thermally responsive plate is dish shaped and reverses its direction of curvature at a predetermined temperature. Three moveable contacts are secured to the thermally responsive plate. An elastic member extends between the protrusion and the thermally responsive plate. A rotation member prevents the thermally responsive plate from rotating, thereby maintaining the moveable contacts in opposition to the fixed contacts. The conductive terminal pins are located at a neutral point side of phase windings of a three-phase motor so that AC current flowing into the three-phase motor is interrupted.

Abstract: A sealed electric compressor having a normally-off type pressure switch and a fuse element. The pressure switch is placed in a sealed housing, connected parallel to a main winding of an electric motor, and, when the pressure of refrigerant in the sealed housing is abnormally high, activates to short-circuit the main winding. The fuse element is connected in series to the main winding and an auxiliary winding of the electric motor and interrupts conduction of electricity to the electric motor when an excess current that is produced when the pressure switch short-circuits the main winding flows.

Abstract: An acceleration switch includes a closed container further including a cylindrical housing and a substantially circular metal header plate, a conductive lead terminal inserted through a hole of the header plate and hermetically fixed in the hole, a contact member secured to a distal end of the lead terminal and having a plurality of elastically deformable movable contacts substantially concentric about the distal end of the lead terminal, a conductive inertia ball accommodated in the container and caused to roll in the housing thereby to contact the movable contact, whereby the housing and the contact member are rendered conductive, and a braking member disposed between the movable contacts so as to be capable of urging the inertia ball in a direction of a center of the closed container. The braking member includes an elastically deformable braking portion which is extended so as to normally contact the inertia ball.

Abstract: A thermally responsive switch includes an airtight container including a metal housing and a header plate, conductive terminal pins airtightly fixed to the header plate, a fixed contact fixed to the conductive terminal pin, a thermally responsive plate one end of which is conductively connected to and fixed to the inner surface of the airtight container and the bending direction of which is reversed at a predetermined temperature, and a movable contact fixed to the other end of the thermally responsive plate. In the thermally responsive switch, the movable contact and the fixed contact are composed of a silver tin oxide based contact and gas containing 50% or more and 95% or less of helium is encapsulated in the airtight container in such a manner that gas pressure is equal to or more than 0.3 atmospheres and equal to or less than 0.8 atmospheres at ordinary temperature.

Abstract: A structure for mounting a temperature switch on a compressor of a vehicle air-conditioner is disclosed. The switch has a cylindrical metal container and a thermally responsive element disposed on a container bottom. The structure includes a housing recess for housing the switch, a fixing cover including an upper cover and one or plural band-shaped legs downwardly extending from a peripheral edge of the cover and housed in the recess with the switch, and one or plural claws formed on the fixing cover legs. When the switch is housed in the recess, the claws are engaged with an inner surface of the recess to be locked. An adhesive is interposed between the switch and the recess when the switch is housed in the recess. The legs are constructed so that parts of the legs are buried in the adhesive when the switch is housed in the recess.

Abstract: An acceleration switch permits a current to flow between a housing and a contact member when a conductive inertia ball stored in an airtight container composed of a header plate and a housing is brought into contact with a movable contact of the contact member. In the acceleration switch, a braking portion composed of an elastic deformable braking member is arranged between movable contacts.

Abstract: A capacitance type liquid sensor is disclosed which detects a tilt angle and acceleration of an object using the fact that a liquid surface always keeps itself horizontal. Openings (13, 14) are formed in two sides of a hollow cylindrical closed container (6) made of an electrically insulating material, and the container has two parallel sides (2, 3). Plate-shaped main electrodes (4, 5) on at least one face of each of which silicon oxide film is formed are made to be in contact with the sides so as to close the openings, with the silicon oxide film being placed so as to face the inside of the container. A sealing agent (28) is interposed in a gap between the plate-shaped main electrodes and the sides. The container is filled with electrically conductive liquid (27) of an amount equal to substantially one-half of the inside volume of the container. An auxiliary electrode (8) brought into electrical contact with the conductive liquid is mounted in the container.

Abstract: A thermally-actuated switch mounted on an end of a motor coil of a hermetic motor-driven compressor includes a switch body including a metallic pressure-tight hermetic container, a contact mechanism disposed in the container, and an electrically conductive terminal which hermetically extends through the hermetic container and to which a lead wire is connected, and a holder including a base having a mounting face for the coil end and a holding portion located on a face of the base opposed to the mounting face for holding the switch body. The base is sized so as to prevent radiant heat from transferring from the coil end directly to the switch body. The holder has a through hole through which the terminal is inserted. The lead wire is connected to the terminal having been inserted through the hole so that the holder is held between the hermetic container and the lead wire.

Abstract: A thermal protector (1) including two fixed contacts (13A, 13B) provided at the end part of conduction terminal pins (5A, 5B) projecting into a metallic enclosed container (100), a support (6) arranged in a case, an oscillatory heating resistor (8) supported by the support and having two movable contacts (9A, 9B) facing the fixed contacts, and a heat responsive body (10) interposed between the heating resistor and the support and coupled with the heating resistor through a coupler (12). When an overcurrent flows through the heating resistor to generate heat therefrom and the temperature of the heat responsive body reaches a set level, the heat responsive body is inverted. Inverting motion of the heat responsive body is transmitted to the heating resistor through the coupler, and the current path is opened.

Abstract: A free fall sensor includes an electrically conductive container, an electrically conductive pin having an end inserted into the container, and a movable electrode enclosed in the container, the movable electrode including a coil spring cantilevered on the end of the conductive pin and a weight disposed in an inner space of the coil spring so as to be movable and so as to be prevented from falling off. The weight is a sphere having a smaller diameter than the coil spring.

Abstract: A free fall sensor for detecting a falling state of portable electronic equipment such as notebook personal computers includes a movable electrode including a plurality of moving portions disposed on a circumference at regular intervals so as to be equidistant from a central axis, a fixed electrode disposed outside the movable electrode so as to be brought into contact with and separated from the movable electrode, an inertial member located inside the moving portions of the movable electrode, and a buffer preventing the inertial member from contacting the fixed electrode so that the moving portions serving as movable electrodes are held between the fixed electrode and the inertial member thereby to be prevented from being pressed or rolled. The central axis makes a right angle with a direction of gravity.

Abstract: A thermal switch includes a metal header plate having two through holes, two terminals inserted through and airtightly fixed in the through holes of the header plate, a metal housing including a cylindrical portion having an open end and a generally shallow dish-shaped bottom, the open end being welded to the header plate so that the metal housing and the head plate constitute a hermetic housing, and a thermally responsive element formed into the shape of a shallow dish and disposed on the bottom of the metal housing the thermally responsive element reversing its curvature at a first temperature with snap action and re-reversing its curvature at a second temperature with snap action to return to its former state.

Abstract: A thermal protector includes a header plate and a metal housing having an open end hermetically welded to an peripheral edge of the header plate. The housing is formed into a generally slender shape so as to be suited for mounting on end turns of a stator winding of a three-phase electric motor. A thermally responsive element includes a shallow curved portion at which the element changes states of curvature with snap action in response to different ambient temperatures. The thermally responsive element has two movable contacts secured to it to be disposed symmetrically about a center of the curved portion so that the movable contacts are engageable with and disengageable from fixed contacts respectively. A push piece is disposed in the housing to exert a pushing force on a normally convex side of the thermally responsive element. The pushing force is adjusted by deforming the outer surface portion of the housing for calibration of the operating temperature.

Abstract: A thermally responsive switch includes a metal housing formed into the shape of a bottomed cylinder and having an open end, a header plate including a metal plate having a through hole and an electrically conductive lead terminal pin inserted through and airtightly fixed in the hole in an electrically insulated state, the header plate being airtightly fixed to the open end of the housing so that the housing and the header plate constitute a hermetic housing, a thermally responsive element formed into the shape of a shallow dish and having a generally central through hole, a fixed contact section provided on a portion of the lead terminal pin located in the hermetic housing, a movable plate support secured to the metal plate of the header plate located in the hermetic housing, a movable plate formed of a leaf spring-shaped conductive metal plate and having one end secured to the movable plate support, and a movable contact fixed to the other end side of the movable plate.

Abstract: A protecting device for a car air conditioner includes a timer for timing a period of the rise in the level of a rotation signal delivered from a rotation sensor for detecting a rotational speed of a compressor with the signal being distinguished from noise. On the basis of the obtained period, a judgment is made as to whether rotation of the compressor is in an abnormal state. An electromagnetic clutch between the compressor and a car engine is controlled on the basis of the judgment. The protecting device is mounted on a housing of the compressor with the rotation sensor so that wiring is executed only in an engine room. The protecting device includes a state holding device for memorizing the abnormal state of the rotation of the compressor. The air conditioner can restart on condition that a conscious operation is performed to reset the state holding device.

Abstract: A seismosensitive element includes a housing formed from an electrically conductive material and having an inclined face formed on the bottom thereof to gradually rise concentrically outwardly substantially from a center of the inner bottom face, and a header fixed to the housing to close its open end and having through-aperture in which an electrically conductive terminal pin is fixed in an insulated relation. A contact is fixed an end of the terminal pin located inside the housing and has a plurality of feather portions disposed concentrically with the terminal pin, the feather portions having a predetermined elasticity. An inertia ball is enclosed in the housing to be located substantially at the center in the housing in a normal position of the element in a stationary state.