Abstract: A switch structure comprises a control element, which comprises an alloy piece and a swinging device. The swinging device has an actuating element used to actuate the swinging device when the actuating element is pushed. When the alloy piece is overheated due to overloading of current, it will deform toward the actuating element so as to eject the actuating element, which causes the swing device to swing outwards and is released from the supporting of the stopper in the switch body. Then, the swing device moves towards the original closing position, and the elastic contacting piece is released from the pressing of the swing device to eject upwards. Two joints connected in an electric loop are tripped. The object of rapid response, cutting power source, and safety is therefore achieved.

Abstract: A switch structure which includes an alloy piece, a contact control device, and a push device is disclosed. The contact control device includes an elastic part and connects to an end part so that the end part may reciprocally move with respect to the contact control device in a horizontal direction. The end part normally contacts with the upper side of the stopper placed in the switch body and is used to push the push device towards the end part when the alloy piece is overheated and strain is generated due to the current flowing through the alloy piece. The end part then elastically contracts and escapes from the stopper to fall down so that another end of the contact control device projects upwards and does not press the elastic contact plate. Therefore, the elastic contact plate may escape from the two contact points to cut off the power source rapidly by the elastic force to achieve the purpose of safety.

Abstract: A switch structure comprises a switch case, a switch, a contact reed, a control element, a swinging device, and an alloy piece. The swinging device is assembled with the control element. The switch is coupled with the contact reed. When the alloy piece is overheated due to current overloading, it is deformed towards the control element so as to push the swinging device that is then swung away and released from the support of the switch case. As a result, the control element moves towards to an original off position. An elastic contacting piece is released from the pressing of the control element so as to be ejected upwards and break the power supply.

Abstract: The thermal circuit breaker and switch has fixed and movable contacts, and non-conductive contact and trip actuators. The movable contact is provided on the free end of a lever arm that normally biases the movable contact toward its open position. The contact actuator transfers movement from a rocker or operator to the movable contact arm when no overload condition exists. The trip actuator is L shaped and rotates in a socket when engaged by a thermally sensitive bi-metallic element so as to allow one end of the contact actuator to float freely, allowing the movable contact arm's bias to open the circuit. The bi-metallic element is so positioned as to engage and rotate the trip actuator only when the bi-metallic element is deformed due to an overheat condition that occurs with an overcurrent. A compression spring acts between the upstanding legs of the trip actuator and the underside of the rocker thus biasing the rocker to the `off` position and biasing the trip actuator to the `reset` position.

Abstract: The thermal circuit breaker and switch has fixed and movable contacts, and non-conductive contact and trip actuators. The movable contact is provided on the free end of a lever arm that normally biases the movable contact toward its open position. The contact actuator transfers movement from a rocker or operator to the movable contact arm when no overload condition exists. The trip actuator is L shaped and rotates in a socket when engaged by a thermally sensitive bi-metallic element so as to allow one end of the contact actuator to float freely, allowing the movable contact arm's bias to open the circuit. The bi-metallic element is so positioned as to engage and rotate the trip actuator only when the bi-metallic element is deformed due to an overheat condition that occurs with an overcurrent. A compression spring acts between the upstanding legs of the trip actuator and the underside of the rocker thus biasing the rocker to the `off` position and biasing the trip actuator to the `reset` position.

Abstract: A small-sized simple switch for circuit protection of the present invention is simple in structure and easy to operate, and can be readily switched for safety protection of circuits. An alloy plate of the present invention is highly resilient. When in overload, the alloy plate expands and becomes deformed due to the different thermal expansion coefficient and is deformed upward to become disengaged from a wire connecting pad with which it is originally in contact, causing the switch to be switched from the "ON" condition to the "OFF" condition. The alloy plate pushes a lever pivoted to the moving end of the alloy plate to move up such that the lever pushes one end of a pivoted reset button to move up. A user only has to depress the reset button and the switch will be again in the "ON" condition such that repeated ON/OFF conditions of the protection circuit can be effected.

Abstract: The present invention is a compressor plug with internal thermal overload protection. It simplifies and improves the installataion of, and means of conducting electricity to, a compressor such as is used as a refrigeration compressor. It comprises a housing which contains electrical connections that are molded integral to the housing. The housing further comprises a clearance that accepts a thermal overload protection device. The housing further comprises an insert that serves as a structural member reinforcing said housing. The insert can include a slot which permits mounting of said compressor plug to a top of a shell used to house a refrigeration compressor.

Abstract: A pre-assembled holder (11) for a bimetallic switching device (12) in a temperature-dependent switch (10) comprises a supporting part (13) made of an electrically insulating material and two electrically conductive contact parts (14, 15) which are fastened to the supporting part (13) before the switching device (12) is inserted. The holding ends (24, 25) of the two electrically conductive contact parts (14, 15) protrude beyond the supporting part (13) and are designed to bear and clamp the switching device (12) between them outside the supporting part (13). An insulating cap (31) can be placed over the holding ends (24, 25) after the switching device (12) has been inserted (FIG. 1).

Abstract: A circuit overload protective device includes a body having a button pivotally disposed thereto and a bimetallic strip disposed thereto which has a first contact point disengagably contacting a second contact point on the body. A first member and a second member are respectively connected to an underside of the button, wherein the first member has a leg extending therefrom so as to be shifted into a curved recess defined in a first inner side of the body when the bimetallic strip is deformed, and the second member has a distal end thereof connected to the first contact point. A third member is disposed to a second inner side of the body and a spring is biasedly connected between the first member and the third member.

Abstract: A thermostat having a cup for housing a bimetal blade. A flange extends from the top edge of the cup which receives an insulating layer and cover material on its top surface. The cover is then folded around and under the flange, simultaneously folding the insulating layer, and then crimped. The added layers of material, which previously extended beyond the depth of the cup can now be essentially equal to the extent of the cup's depth, providing substantially no additional thickness to the overall thermostat.

Abstract: An electrode mount with a stationary electrode and a movable electrode facing each other, the movable electrode including a snap-acting and thermosensitive element which comes into contact with and out of contact with the stationary electrode, fixed thereon by a frit glass bead is encased in a glass envelope having an opening at one end thereof. A sealed portion for sealing the frit glass bead and the opening of the glass envelope is formed by melting frit glass therebetween.

Abstract: An electrical circuit breaker has an insulative rigid base on which a circuit breaker assembly is mounted. The base has two long sides with grooves extending the full lengths thereof. A metal cover is crimped onto the base at and along the full lengths of the grooves.

Abstract: A thermal protector housing, for use in mounting an electrical thermal protector on a surface of a device to be protected against undue temperature rise, comprises a housing body of insulating material with an open end for receiving a thermal protector to be housed in it, a stop within a body limiting the distance the protector can be inserted and a securing member for securing a thermal protector between the open end and the stop, which securing member comprises a flexible finger portion of an exterior surface of the housing body.

Abstract: A motor protector having a can and an internal electrical contact is hermetically sealed to a disk-shaped header of conductive material, the header having a flattened edge for orientation in the can during fabrication of the protector and having spaced conductive pins sealed in and insulated from the header. A heater-support having holes for fabrication is bonded to one conductive pin, a bimetallic element on the support has a plane parallel to the axes of the pins and has a contact element normally contacting the can contact. A heater is bonded to each of the electrically conductive pins spaced from the movable contact and in a plane parallel to the axes of the conductive pins. In making the motor protector a fixture has one depression with pins mating with the support apertures and has a second depression receiving the header in an upright position and adjacent the first depression.

Abstract: A snap-action thermostatic switch, having a bimetallic member with a snap-action formed section bearing against a calibration dimple, has an insulative coating provided on the calibration dimple to prevent current flow through the dimple which could disrupt switch operation or cause damage to the bimetallic member.

Abstract: An insulating casing for enclosing a thermal switch, with the insulating casing having a plastic envelope, in which at least one oxide ceramic part is arranged on one side of the thermal switch, between the latter and the envelope.

Abstract: For simplified and more rapid production of a switch component (1) with a bimetallic element (3) and a switch (6) which can be actuated by this via a transmission element (15), the carrier or feed parts (4) are connected to the contact parts (5) by welding. For this purpose, each carrier or feed part (4) has a vertical weld section (8) passed through the insulating body (2) and having a smaller cross sectional surface than the remaining portion of the carrier or feed part (4).

Abstract: A thermally responsive electric switch has an open ended, cup shaped, thermally and electrically conductive housing containing a thermostatic disc. A base of electrically insulative material, mounting a stationary contact arm, is received in the open end of the housing and captures an end of a movable contact arm between the base and the housing. The movable contact arm extends through a window in the stationary contact arm and has an opposite end disposed adjacent to the outer periphery of the disc and is adapted to be moved by the disc when it snaps from an unactuated to an actuated configuration to thereby control switch actuation.

Abstract: A bimetallic disc-actuated thermostatic switch comprising a switching assembly including a housing containing fixed and movable contacts and a cap and disc assembly on the switching assembly for moving the contacts between engaged and disengaged positions. The cap and disc assembly includes a bimetallic disc, a support disc for supporting the bimetallic disc on the housing, and a retainer cap for retaining the bimetallic disc on the support disc. The cap has at least one air circulation opening therethrough, and the support disc is formed so that air from the exterior of the cap can pass through the air circulation opening and across the underside of the bimetallic disc to provide increased responsiveness to ambient conditions.

Abstract: A thermostatic device is provided which is formed from a cup, into which a bimetallic element is placed, and a generally flat lid which is crimped to the cup-shaped member, a layer of insulation being placed between the cup and lid. At least the ends of the lid are slightly formed to increase the pressure in these areas after crimping, so as to prevent leakage, particularly leakage of insulating materials, into the interior of the thermostatic device.

Abstract: A sealed bimetal snap disc thermostat is disclosed which is suitable for use in environmental locations in which severe thermocycling occurs. The thermostat provides a disc cup having an imperforate end wall which is the only portion of the thermostat per se which is exposed. A non-metallic enclosure cup is formed with an aperture closely encircling the disc cup and which defines a cavity surrounding the remaining portions of the thermostat. A sealing compound, such as epoxy, fills such cavity. The disc cup is crimped onto the thermostat body and provides an extended portion which is spaced from the thermostat body so that the sealing adhesive provides an interface of substantial area with the metal disc cup to assure a continuing seal. Because the sealant and enclosure cup surround the entire thermostat except for the disc cup, the thermostat is thermally insulated from its environment except for the disc cup end face.

Abstract: A thermoswitch in which two fixed terminals are provided to a base disposed in a bottomed housing and a movable contact mechanism is provided between the two fixed terminals so that the movable contact is connected or disconnected by the displacement of a thermosensitive member such as bimetal, wherein the basal portions of the fixed terminals projecting from the base after solidifed with a first resin and a recess formed by the housing and base is filled and solidified with a second resin such that lead wires connected to the fixed terminals are embedded in the resin. According to this device, penetration of water coming down along the lead wires is positively prevented by the two resin layers.

Abstract: A cap and bracket assembly for a bimetallic disc actuated thermostatic switch comprises a metallic heat transfer bracket having an aperture therethrough and a metallic cup-shaped cap which is receivable on the housing or body of a thermostatic switch for containing a bimetallic disc. The cap comprises a main portion and a reduced terminal end portion, and the end portion is received in the aperture in the bracket and crimped or swaged to capture the bracket in intimate engagement between the main portion and terminal end portion so that maximum thermal transfer between the cap and the bracket is assured. The method of manufacturing the cap and bracket assembly comprises the steps of assembling the cap with the bracket and crimping or swaging the end portion of the cap to secure the bracket thereto.

Abstract: A thermal switch apparatus includes a housing having an opening with an axially extending face. A first slot extends around at least a portion of the face. A second slot extends around at least a portion of the face. The first and second slots intersect for a portion thereof. The first and second slots each have an axis and the axis of one is disposed in oblique relationship to the other.

Abstract: A thermally responsive switching device suitable for use as a motor protector and the like is disclosed. Such device includes a housing assembly consisting of a thermoplastic base and a shallow drawn metallic cover. The base provides sidewalls extending to a peripheral flange against which a flange on the cover is positioned. The thermoplastic material is deformed inwardly around the cover flange to permanently connect the assembly. The switch includes an elongated bimetal snap element supported at one end on the end of a heater in heat exchange relation therewith. The other end of the heater is connected to an external terminal through an opening in the thermoplastic base. The terminal provides a tubular projection extending through the opening and a plurality of inwardly extending, resilient tabs which are welded to the heater.

Abstract: A standard thermostatic switch, particularly one enclosed within a metallic casing, is provided with an insulating material, in the form of a sleeve, between the contacts or bimetallic elements and the metallic casing of the thermostat to aid in sealing the internal elements. The material is an aramide, particularly a copolymer of metaphenylenediamine and isophthaloyl chloride, particularly one marketed under the trademark "Nomex" by E. I. duPont deNemours & Co.

Abstract: An insulating cradle, in the form of an H, is provided for the mounting of the operative portions of a thermostatic switch. The H shaped configuration of the mounting member allows for operative portions both above and below an insulating center portion. The mounting means is so sized as to allow insertion into a metal case, with a friction fit, so as to assure proper mounting of all portions of the thermostatic switch.

Abstract: A construction is provided for a dead case thermostat which allows for the operating parts and separators of the thermostat to be held in place, within the case, without crimping of the case and with little, if any, danger of breaking of the ceramic insulators.

Abstract: A circuit breaker comprises a hermetically sealed glass envelope having three lead-in wires extending therethrough. Within the envelope, a stationary contact is fastened to one of the wires, a thermostatic element to another of the wires, and a heater to the third wire. The circuit breaker permits simultaneous protection of two windings of a motor, for example, the main winding and the start winding. The thermostatic element provides protection for one of the windings and the combination of the thermostatic element and heater provides protection for the other.

Abstract: A cradle assembly for supporting a pair of switch means adapted for operation at predetermined trip points. The cradle has a pair of means for mounting the switch means pivotally arranged with each other and adjustably movable toward an adjusted position to establish the predetermined trip points of the switch means, respectively. The mounting means include a pair of integrally formed means adapted for fixed interconnection with each other to prevent pivotal displacement movement of the mounting means from the adjusted position thereof and positively maintain the predetermined trip points of the switch means.

Abstract: A motor protector has a thermally responsive contact element mounted inside a flat, rectangular, open-ended metal can. A metal cover mounts a complementary contact and is secured over the open end of the can by can flanges to clamp an electrically insulating gasket between the can and cover. The contact means close a circuit between the can and cover but the thermally responsive contact element is movable in response to increase in temperature for opening that circuit. Integral crimpable terminals are provided on the can and cover. A flat metal heater ribbon having an insulating coating thereon has one end welded to the exterior of the can. The ribbon coating is deformed at selected locations and the coated ribbon is folded at those locations to fit closely against the three exterior sides of the flat rectangular can. The can terminal crimps the opposite end of the coated ribbon in electrically insulated relation to the ribbon for holding the coated ribbon in position on the can.

Abstract: A thermally responsive motor protector device particularly adapted for protecting a small electrical motor against both overcurrent and overtemperature conditions in an environment requiring hermetic sealing of the protector has a structure which provides the device with the desired hermetic seal and with a very small thermal mass for achieving the desired speed of response to overcurrent and overtemperature conditions in a small motor while also permitting mass production and automatic calibration of the device at low cost and inexpensive installation of the device without risk of loss of calibration.

Abstract: The assembly of an enclosure containing a fluid, and a capsule comprising a casing which contains a heat-sensitive element, the capsule being mounted in a wall of the enclosure through a mounting arrangement comprising a metal part forming one end of the casing and engaging the heat-sensitive element, a seat formed in the wall and having a bottom provided with an opening which opens into the interior of the enclosure, a lateral orifice which opens to the outside, and an inner surface having an annular zone between the opening and the orifice, and means for inserting and holding the capsule inside the seat to seal the opening by urging the metal part towards the annular zone with the possible interposition of a seal.

Abstract: A motor protector characterized by low cost, by improved service life and by improved cycling properties has a bimetallic element mounted in a metal housing to move a first contact along a selected axis to engage and disengage a complementary contact in response to changes in element temperature. An electrical resistance heater coil, preferably with less than one full coil convolution, is oriented and secured externally of the housing so that the axis of the magnetic field established by the heater coil is coincident with the axis of movement of the first contact.

Abstract: A thermostatically controlled system is disclosed in which the thermostat is exposed to a zone of high moisture content. In order to prevent the accumulation of moisture within the thermostat which could cause tracking failures or over pressure failures in the device a vent opening is provided which vents the interior of the thermostat to a zone of low moisture content. The vent prevents the occurrence of vacuum within the thermostat and thereby eliminates the pumping of moisture into the thermostat from the zone of high moisture content. Also the vent allows for the escape of any moisture which might penetrate into the thermostat interior.

Abstract: A wedging member, such as a ball, is frictionally engaged with inclined supporting ends of a pair of contact elements at a calibration temperature. The wedging member retains the positioning of the supporting ends as the temperature is changed from the calibration temperature to a hardening temperature for a hardenable material, such as an inorganic-base chemical-setting cement, for rigidly securing the supporting ends.

Abstract: A method of manufacturing sealed thermostats or the like is disclosed in which male and female members are assembled with an interference fit to produce a seal which is maintained through a predetermined operating temperature range. The minimum interference during assembly is selected so that such minimum interference is greater than the difference in the temperature during assembly and the most adverse seal temperature to be encountered within the temperature range, times the difference in coefficients of thermal expansion and contraction between the members times the linear dimension of the seal. In addition, the two members are selected so that the maximum total elastic deformation is greater than the difference in coefficient of thermal expansion and contraction times the difference between the maximum and minimum temperatures within the temperature range times the linear dimension.

Abstract: A thermostat includes a switch and an ambient temperature sensor that controls the switch. Both the switch and the ambient temperature sensor are supported by a support area of a base plate in a calibrated relationship. The base plate includes a pair of mounting strips each of which is parallel to and offset from the support area of the base plate, connected to the support area by a pair of narrow stress-isolating legs at the ends of the strip. The legs extend from integral stiffening parts of the base plate extending upright from the area of the base plate supporting the switch and the temperature sensor.