Abstract: A method of operating a mechanical switching device is disclosed. The switching device includes a housing, an assembly disposed in the housing, and a body. The assembly is thermally deformable and comprises a beam held in two different places by two arms secured to edges of the housing. The beam is remote from the body in a first configuration and in contact with and immobilized by the body in a second configuration. The assembly has the first configuration at a first temperature and the second configuration when one of the arms has a second temperature different from the first temperature. The method includes exposing an arm of the assembly to the second temperature, and releasing the beam using a release mechanism. The release mechanism includes a pointed element comprising a pointed region directed towards the body. The pointed element limits an open crater in a concave part of a projection.

Abstract: A printed circuit board (PCB) assembly according to one embodiment of the present disclosure includes a first pad; a second pad disposed to be spaced apart from the first pad; and a thermal fuse provided with a first terminal and a second terminal which are each coupled to the first pad and the second pad by soldering. Here, a contact area between the first pad and the first terminal is smaller than that between the second pad and the second terminal.

Abstract: A gas assist flare tip for enhancing smokeless combustion of a flare gas. The assist tip which has a shroud positioned on a flare stack, the shroud having an outer annular portion and an inner tubular portion which fits over the riser. There is an annular plenum which is partially formed by the tubular portion and the outer portion and has an annular vent proximate the open end of the riser. There is at least one air jet eductor having a discharge outlet opening into the plenum.

Abstract: A circuit protection device includes a substrate with first and second electrodes connected to the circuit to be protected. The circuit protection device also includes a heater element between the first and second electrodes. A sliding contact is connected by a sensing element to the first electrode, second electrode, and heater element, thereby bridging and providing a conductive path between each. A spring element is held in tension by, and exerts a force parallel to a length of the substrate against, the sliding contact. Upon detection of an activation condition, the sensing element releases the sliding contact and the force exerted by the spring element moves the sliding contact to another location on the substrate at which the sliding contact no longer provides a conductive path between the first electrode, second electrode, and heater element.

Abstract: The invention relates to a thermal safety device intended to be fixed to a substrate (2), comprising a strip fuse (20) comprising a metal strip provided with a first contact zone (23) electrically connected to a first pad (8) on the substrate (2) and also provided with at least one other contact zone (22) capable of being soldered to another pad (7) on the substrate (2), said strip fuse (20) also comprising a lever (30) having a free end (36) not connected to the metal strip (21). According to the invention, the lever (30) generates a tilting moment of the soldered contact zone (22) about at least one pivot point disposed between the two contact zones (22, 23) when the end (36) of the lever (30) is pressed.

Abstract: A new type of high temperature thermal disconnect has been developed to protect electrical and mechanical equipment from damage caused by operation at extreme temperatures. These thermal disconnects allow continuous operation at temperatures ranging from 250.degree. C. to 450.degree. C., while rapidly terminating operation at temperatures 50.degree. C. to 150.degree. C. higher than the continuous operating temperature.

Abstract: The connection structure of a circuit protection element for securely connecting at least two lead terminals of the circuit protection element to a circuit board includes terminal connection elongated holes each provided in the circuit board for connecting the lead terminals to the circuit board by soldering. The circuit board is positioned in such a way that the elongated direction of the elongated terminal connection hole is positioned in a downward direction. When an abnormal current is applied to the circuit, or when the circuit protection element fails to heat itself up to a high temperature, the solder melts. Thereby, the lead terminals easily disengage from the terminal connection holes so that the circuit protection element falls freely from the circuit board. Thus, the circuit is surely cut off easily.

Abstract: Between a relay terminal of a direct current motor and a contact terminal of an electromagnetic switch, there is provided a fuse which is melted to cut off an electric current upon reaching a predetermined temperature. By properly setting the predetermined temperature at which the fuse melts, it is possible to make the fuse heated to a high temperature and melted in a relatively short time to cut off the electric current in the event of, for example, a continuous operative condition caused due to such a failure as fusion adhesion of a movable contact point with a B-terminal and an M-terminal or fusion adhesion of a contact point mechanism outside a starter, or an overcurrent supply condition caused upon a rotor being locked.

Abstract: A fusible element is provided that includes cooperating interfitting parts surrounded by fusible material. The cooperating interfitting parts are arranged so as to place compressive force on the fusible material in response to attempted separation of the interfitting parts. Further, the arrangement also reduces the forces on the fusible material. In response to a predetermined time-current condition, the fusible material softens sufficiently to permit the release and separation of the interfitting parts.

Abstract: The thermal fuse has a spring clip (1) with solder locations (5, 6) at both ends as well as a bending section (4) in the region between the solder locations. Given a tension-free spring clip, the spacing between the solder locations (5, 6) corresponds to the regular spacing of the appertaining circuit contacts (15, 16) of the substrate. After the spring clip has been soldered onto the circuit contacts (15, 16), the bending section (4) is deformed such by applying force that a pre-stress arises in the spring arms (2, 3) of the spring clip.

Abstract: This invention provides a switch adapted to close upon pressing by an actuator of a movable piece initially in an open switch position, the actuator being made of a material which melts at a predetermined temperature. The switch opens when melting of the actuator by the heat generated from an overcurrent allows the movable piece to return to its initial position. The movable piece is made of a material which fuses at a predetermined temperature, such that the switch opens upon fusion of the movable piece by the heat generated from the flow of an overcurrent through the movable piece.

Abstract: A thermal overload fuse (1) for fixation to a circuit substrate (17) comprising at least one spring arm (13) which is solderable, under fixed pre-stressed, to a contact location on the substrate, characterized in that the spring arm (13), which is fixed to an at least substantially planar frame part (2), adopts, in its relaxed state, a position which is spaced in a perpendicular direction relative to the substrate (17), in particular relative to the contact location (16); and in that the free end of the spring arm (13) is held down by at least one auxiliary web (7) onto the substrate (17), in particular onto the contact location (16); and in that the auxiliary web (7) is detachable from the frame part (2) along a predetermined line.

Abstract: An improved temperature fuse is provided for electrical equipment having a heat transmission plate for holding a solder pellet and a control rod supported on, and prestressed against, the solder pellet. The improvement includes a solder pellet having a metal coating disposed on the entire periphery thereof. The metal coating has a higher melting point than the solder.

Abstract: The invention is directed to a fuse (1), in particular for electric motors (3), which includes a sensor (13) taking support upon the stator winding (14) of the electric motor (3), the sensor being made of a fusible material the melting of which on undue heating of the stator winding (14) causes opening of a switching device (18) connected in the supply circuit of the motor.

Abstract: A heat-recoverable article which can be connected to a power supply and a switch unit which comprises a thermally-responsive member which can be thermally coupled to the article. The thermally-responsive member, when so coupled, regulates the passage of current through the article. The article heats and recovers and current through the article is regulated automatically.

Abstract: An overtemperature protector for an appliance having an electrical heating element, the overtemperature protector being formed basically of just a spring blade positionable to bring a contact on the surface of the blade into circuit-energizing engagement with a fixed contact, and an insulator-capped fusible pin retaining the blade in that position. Excessive heat in the appliance softens the pin, allowing the spring blade force on the insulator cap to shear the pin and interrupt the circuit. The overtemperature protector is preferably incorporated in a thermostatic control, the fixed contact being supported on a lateral extension projecting from one circuit element of the thermostat assembly and the spring blade being supported within the assembly with an insulating spacer separating it from the thermostat element having the lateral extension. The spring blade is preferably sickle-shaped for compactness despite having a long length for low force to minimize effects of creep of the fusible pin.

Abstract: A container is partially filled with a meltable body that has a predetermd melting point. An actuating member is arranged to translate through the container and displace the meltable body upon its melting.

Abstract: An apparatus activates an alarm when the heat and temperature provided by a kiln reach a predetermined level. The apparatus includes a tube extending through the wall of the kiln. An integral mounting surface at the end of the tube inside the kiln provides a surface upon which can rest a pyrometric cone. An elongated member extends through the bore of the tube resting on the pyrometric cone at one end and secured to a pivot point at the other end outside of the kiln. An alarm switch is mechanically coupled to the elongated member. When the elongated member descends because the cone deforms an alarm is activated.

Abstract: An apparatus activates an alarm for a kiln operator when the heat and temperature provided by a kiln reach a predetermined level thereby activating a kiln shut-off weight and switch. The kiln shut-off weight rotates to engage a rod coupled to a switching means for activating an alarm.

Abstract: A re-usable electrical fuse having an elongaged, non-electrically conductive, normally vertically extending capsule and a pair of electrical switch contacts extending inwardly of the capsule at each end thereof, the upper pair of contacts being normally close-circuited by a charge of fusable metal within the capsule and adapted to open circuit and close-circuit the lower pair of contacts by gravity action upon melting of the fusable metal charge due to a current overload being imposed upon an electrical circuit to be fuse-protected in series connection with the upper pair of electrical switch contacts, thereby permitting the re-use of the fuse by rotating the capsule through 180 circular degrees so that the now close-circuited lower pair of electrical switch contacts is in the upper position and in series circuit connection with the protected circuit.