Abstract: A push button switch with overload protection is disclosed. The switch comprises a housing, a conducting unit, and an acting unit The conducting unit comprises a normal-opened first conducting leaf and a thermally deformed bimetallic sheet. The bimetallic sheet is of a U-shape having a returning end and an opening end. The returning end can be deformed to an overload position from a normal position in response to overload, and is provided with an enabling rest for supporting a tail of a rocking lever of the actuating unit so as to cause a depression of a nose of the rocking lever on the first conducting leaf, which forces the fist conducting leaf into a closed position, or to release said depression to permit the fit conducting leaf to return to its open position.

Abstract: An overload-protection push-button switch with automatic resetting mechanism is disclosed. The switch is characterized in that a pressing stem actuates a conducting leaf via an enabled rocking lever, and that a wrecking bar is provided to dislocate the position of a positioning unit so that the pressing stem will automatically return back to its reset position in case the rocking lever is disabled due to overload. By means of the above structure, a push-button switch which is capable of exactly functioning and has a simple structure to easily assemble is available.

Abstract: A circuit breaker switch essentially comprising a push button switch, an alloy metal having one end connected to a contact of a circuit of the switch and the other end being mounted to the circuit of the switch. If the current to the switch does not exceed a predetermined current value, the switch functions as a normal switch. That is, the original position of the switch is in the “OFF” position and a depression to the push button changes its position to the “ON” state. A further depression of the push button restores the push button to the “OFF” state. When the current passed to the switch exceeds the predetermined current valve, the alloy metal is thermally deformed and curved upward, which forms a gap to allow an insulating plate to be inserted to cut off the current supply and open the circuit. The switch restores to its function by resetting the push button.

Abstract: A push button current cut-off safety switch comprising a housing having an opening; a push button mounted within the housing and being fitted to said opening; a push rod being mounted below said push button and including a triangular passage and an insulating element; a spring being inserted into and compressed by the push rod; an interlinking rod having one end pivotally connected to the housing and the other end being connected to the triangular passage of the push rod; a first conductive plate; a second conductive plate being connected to the first conductive plate by a resilient plate such that the downward movement of the push rod electrically connects to the first and the second conductive plates and the upward movement of the push button disconnects the first and the second conductive plates; an alloy metal made of a shape memory alloy which is thermally deformable, said alloy metal being linked to the second conductive plate and connected to the interlinking rod; a third conductive plate being connect

Abstract: A power switch device includes a switch body with a switch contact device pivotally connected to a switch cover body. An alloy piece is connected to one of two contact terminals and a second contact joint to which the other contact terminal disengagably contacts when the circuit is closed. The switch contact device has a movable member retractably received therein and the alloy piece contacts one end of the movable member. The end of the movable member is normally supported on a plate in the switch body so that when the current is overloaded, the alloy piece is thermally deformed to push the end of the movable member away from the plate and the switch contact device is therefore pivoted to release a conductive plate pressed by the switch contact device so as to shut the circuit.

Abstract: A circuit breaker with a push button includes an electrical breaker having a casing having an opening defined therein with a hole defined in each side near the opening. A first prong and a second prong each attached to and extending through the casing. An alloy plate is attached to the first prong and has a free end aligning with the second prong. A seesaw switch is pivotally mounted in the opening of the casing with a shaft extending from the center of each side. Each of the shafts is received in the corresponding hole in the casing. A push block is pivotally attached to the bottom portion of the seesaw switch and has a recess defined therein to receive the free end of the alloy plate. An activation block extends from a top portion of the seesaw switch. A push button is attached to the electrical breaker and has an activation rod movable back and forth therein. The activation rod presses on the activation block of the seesaw switch and has an axis at a right angle with the axis of the shaft.

Abstract: A switch structure comprises a control element, which comprises an alloy piece and a swing contact device. The alloy piece includes an actuating piece with a convex part, which has a upper side normally pushing the lower surface of the end part in the swing contact device so that the actuating piece ejects outwards and escapes from the end part when the alloy piece is overheated because of the current flowing through therein overloaded. Therefore, the end part falls down due to no support force and the head part of the swing contact device deforms upwards and does not press on the elastic contact piece. The elastic contact piece is released from the pressing of the swing contact 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 power switch device includes a switch box with a button pivotally connected thereto which is pivotally connected to an actuating member. An engaging member is movably connected to the actuating member and removably engaged with a block. A head connected to the actuating member movably compresses a conduct plate so that when the conduct plate contacts a terminal plate, the circuit is closed. A bimetal plate connected to the terminal plate has a pushing end contacting the engaging member so that when the current is overloaded, the pushing end is thermally deformed to push the engaging member away from the block and the engaging member drops due to gravity. The head is then lifted to release the conduct plate from the terminal plate to open the circuit.

Abstract: A safety switch. The switch includes a housing configured to hold a pivoted lever at the top and three metal contact plates at the bottom. A movable member pivots on the intermediate metal contact plate. A bimetal element with a fixed end is connected to one end of the movable member and a free end of the bimetal element is suspended above one of the lateral metal contact plates. An actuating member is coupled between the lever and the movable member and driven by the lever to tilt the movable member between a first position where the free end of the bimetal element is forced into contact with the corresponding lateral metal contact plate, causing the circuit to be closed, and a second position where the free end of the bimetal element is disconnected from the corresponding lateral metal contact plate, causing the circuit to be opened. The lever can include a light, a conductive end of which contacts the remaining lateral metal contact.

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 device has a conventional fuseless breaker device, a first conductive blade, a second conductive blade, a fixed plate, and a movable plate. The breaker device has a metal bar having two expansion coefficients, an insulator plate, a safety button, and a coiled spring. The metal bar contacts the first conductive blade. A pressing button which is disposed on the switch device has a first portion and a second portion. A lamp assembly is disposed in the pressing button. The lamp assembly has a break display lamp and a dark display lamp. The break display lamp is disposed in the first portion of the pressing button. The dark display lamp is disposed in the second portion of the pressing button.

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 present invention provides an electric device comprising two electric terminals, a button mechanism having a push button that can depressed to toggle between "on" and "off" statuses, and a conductive reed that conducts electric current between the two electric terminals when connected and disables the passage of current when disconnected. When the button is set "on", a reserve space exists between the reed and the button for the reed to spring upward without pushing the button upward. When the current passing through the reed exceeds a predetermined current level, the reed will become heated and spring upward and rest in the reserve space so as to electrically disconnect the two electric terminals.

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: 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 circuit breaker has a body providing a lever pivotally mounted on the upper end thereof. Two terminals are disposed within the body, wherein the first terminal forms a bimetal thereon. The terminals are electrically connected with each other in a normal state. A linkage is mounted on an end of the lever, which forms an isolated member on the lower end of the linkage. Pressing the lever, the isolated member of the linkage will moved upwards to separate the two terminals. When the lever is held by some heavy substances, the bimetal can be deformed to disconnect with the second terminal in over-current for cutting out the circuit.

Abstract: An electrical breaker includes a casing with a pushbutton pivotally connected to the top thereof, an alloy plate extending from one of two inside walls of the casing and connected to a first prong extending from the casing, a push member and an L-shaped member pivotally connected to the first end of the pushbutton, a biasing member biasing the push member to let the protrusion of the push member press against the other inside wall which has a recess defined therein. The distal end of the alloy plate is pushed by the push member to contact the second prong when the first end of the pushbutton is pushed, and the distal end of the alloy plate is disengaged from the second prong by the horizontal portion of the L-shaped member when an overload current passes through the alloy plate which curves to push the first end of the pushbutton upwardly.

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 switchable circuit breaker having a housing, stationary and moveable contacts, a switching member for actuating the contacts to assume a first condition in which the contacts are open and a second condition in which the contacts are closed, and a breaker is disposed within the housing to interrupt current flow through the contacts in response to the current flow exceeding a predetermined level. The switching member includes a pusher moveable between an advanced position in which the pusher acts on the contacts to assume a contact opening condition and a retracted position in which the pusher releases the contacts to assume a contact closing position. The pusher is guided within the housing so as to convert a linear motion of its drive end into a steplike motion of its active end in order to provide a snapping transition between the closing and opening conditions of the contacts, thus assuring "non-teaseability" in the switching operation.

Abstract: A thermal overload relay is formed of a case for retaining the relay and having an insertion hole, an adjusting device for adjusting a working current of the relay and situated inside the insertion hole, and a cover for covering the adjusting device and situated in the insertion hole. The case includes a first coupling device formed around the insertion hole. The cover is formed of a transparent plate and includes a smooth upper surface, a second coupling device formed on a side surface and engageable with the first coupling device, and a handle formed on the upper surface of the cover for handling the cover. When the cover is disposed in the insertion hole, the first and second coupling devices are engaged, wherein the upper surface of the cover is located below an upper surface of the case. The cover can be fixed to the case such that the cover can be removed from the case or permanently fixed to the case.

Abstract: A receptacle including a casing to hold a positive contact metal plate, a negative contact metal plate, which is connected to the negative terminal of power supply, and a ground plate, a T-shaped copper plate mounted inside the casing and connected to the positive terminal of power supply, a bimetal strip connected to the positive contact metal plate and disposed in contact with the T-shaped copper plate, an insulative member turned about a post inside the casing and supported on a spring, and a press button mounted on the outside of the casing, wherein when the press button is depressed, the bimetal strip is forced away from the T-shaped copper plate by the insulative member to cut off power supply; when the receptacle is electrically overloaded, the bimetal strip is heated to deform and to disconnect from the T-shaped copper plate to cut off power supply.

Abstract: A surge absorbing element is parallel connected to an electronic device via a pair of communication lines. A normally closed thermal response switch is serially connected between the electronic device and the signal source on the input side of the surge absorbing element. When a surge voltage is instantaneously applied to the communication lines, the thermal response switch remains in the closed position and the surge absorbing element acts to suppress the surge voltage. When an overvoltage or over current is continuously applied to the communication lines, the thermal response pieces of the thermal response switch open and simultaneously release the movable body. Consequently, the electronic device is disconnected from the signal source, thus stopping the continuous overvoltage or overcurrent from flowing to the electronic device and the surge absorbing element. Simultaneously, the reset pin is projected through the casing.

Abstract: A device for manually controlling a thermal relay associated with a contactor and housed, together with the contactor, in a case having stop and reset push-buttons, comprises levers mounted for rotation in a support fixed to the front of the box of the thermal relay. Each of the push-buttons engages a respective lever so that the latter is applied on a stop pusher or a reset pusher of the thermal relay. A combined stop and reset operation from the actuation of the stop push button alone is possible because the stop lever bears on the reset lever.

Abstract: A device is disclosed for the manual control of thermal relays, comprising a case with a push-button on a front wall and having a transmission member; the latter comprises a rigid support and a resilient lever applicable on the stop and re-set pushers of a thermal relay. A drive element proper to the push-button is applicable on an intermediate zone of the resilient lever.

Abstract: A ganged, multiple pole circuit breaker in which the multiple poles of each circuit breaker are mechanically related to a single operating point on the associated breaker. Their single operating points are pivotally related to a first common pivot point, which is fixed in relation to a common frame which supports both circuit breakers. Their single operating pivot points are additionally pivotally related to a second common pivot point. A guide arrangement, fixed to the common frame, guides the second common pivot point in a predetermined rectilinear path when actuated by an operating mechanism which includes a shaft arranged to extend through a transformer tank wall to a master operating handle. The guide arrangement prevents any motion of the second common pivot point in a direction lateral to the rectilinear path.

Abstract: A power sustaining thermal switch placed in shunt with an existing electrical switch results in the flow of electricity through the thermal switch for a predetermined period of time after the existing switch has been turned off. Thus sustaining power in the thermal switch circuit for supply to an electrical device.