595results about "Emergency protective device manufacture" patented technology

A printed wiring board includes a substrate (20) on which a wiring pattern (12) has been formed, and a fuse (6) provided on the substrate (20). One end of the fuse (6) is directly connected to a first pad (12a) of the wiring pattern (12), and the other end of the fuse (6) is directly connected to a second pad (12b) of the wiring pattern (12). The fuse (6) is covered by a protective material (7).

The invention discloses a preparation method of a CuW (Copper Tungsten) and CuCr (Copper Chromium) integrated material used for high voltage electric contact. The method comprises the following steps: firstly, a high copper alloy foil strip is prepared by using a rapid solidification melt-spinning method; subsequently the de-coppering treatment is carried out on a CuW pre-combining plane by using an acid dissolving method; a porous W-framework is obtained on the combining plane; the overall sintering infiltration is carried out on the CuW, the alloy foil stripe and the CuCr alloy inside a reducing atmosphere furnace so as to obtain the CuW and CuCr integrated material; and subsequently the solid solution aging treatment is carried out on the material. As the Cr element inside the alloy foil stripe is filled and infiltrated into the porous framework during the infiltration process and is formed into W-Cr solid solution with the W, the metallurgical bonding is realized between the framework and a substrate copper phase; and the boundary bonding strength of the integrated material is improved.

The invention discloses an automatic assembly device of a breaker terminal screw. The device comprises a bench. The device is characterized in that a rotary disk which is driven by a rotary disk drive device to rotate, a terminal feeding device, a screw matching detection device, a screwing back device and a qualified product unloading device are installed on the bench, the terminal feeding device, the screw matching detection device, the screwing back device and the qualified product unloading device are arranged on four stations on the periphery of the rotary disk along the rotary direction of the rotary disk sequentially, at least one terminal positioning hole which rotates through the rotary disk and corresponds to the devices on the stations is arranged on the rotary disk, a screw feeding device and a defective product unloading device which correspond to the screw matching detection device are arranged on the bench, and all devices are connected to a Programmable Logic Controller (PLC). By the aid of the device, the assembly of the breaker terminal screw can be completed automatically, defective products can be removed, the production efficiency is improved effectively, the labor cost is reduced and the assembly quality of the breaker terminal screw is stable and reliable.

A circuit breaker terminal lug cover is structured to mechanically secure to a circuit breaker terminal lug and protect the terminal lug from degradation or corrosion. The terminal lug includes a number of terminal lug screws capable of securing a number of cables to the circuit breaker. The terminal lug cover includes a plurality of sides structured to carry heat away from the terminal lug or deflect ionized gases away from the terminal lug. At least one of the sides includes a number of securing members structured to mechanically secure the terminal lug cover to the circuit breaker terminal lug. One of the sides includes an access hole permitting access to the number of terminal lug screws.

A fuse element (10), in particular suited for use in electric and / or electronic circuits constructed by multilayer technology, including a printed circuit board substrate material (11), which is usable particularly in the multilayer technology and is coated with a metal or metal alloy (15), from which metal or metal alloy the fuse (12) is generated by means of photolithographic and / or printing image-producing techniques and ensuing etching or engraving processes, is proposed. The fuse (10) is distinguished in that the printed circuit board substrate material (11), on which the fuse (12) can be provided, includes at least a high-temperature-stable, electrically insulating material, with a coefficient of thermal expansion that varies essentially analogously to the coefficient of thermal expansion of the metal or metal alloy (15) from which the fuse (12) is made.

The invention discloses a contact finger spring assembly tooling. The contact finger spring assembly tooling comprises a guide rod, the guide rod is matched with a central hole in a contact base in a positioning mode, the guide rod is vertically provided with a guide sleeve and a positioning sleeve, the guide sleeve is sleeved on the guide rod in a sliding mode, the positioning sleeve is fixedly sleeved on the guide rod, pressure rods which are distributed along the circumferential direction of the guide sleeve at intervals are assembled on the guide sleeve in a rotating mode, draw rods are assembled on the positioning sleeve in a rotating mode, support rods are connected between corresponding pressure rods and draw rods, all support rods are matched with each other to form a conical framework used for supporting contact finger springs, corresponding pressure rods, draw rods and support rods are matched with the guide rod to form a four-rod linkage mechanism, the support rods are provided with guiding sections, and each of the guiding sections extends from corresponding draw rod hinge joint position and guides the contact finger springs to the installation position of a petal-shaped contact finger. The contact finger spring assembly tooling has the advantages that the whole tooling is convenient to operate, the installation of the contact finger springs of the petal-shaped contact fingers with different installation diameters is achieved, the contact finger springs are freely slipped to the installation position depending on changes of inclined angle of the support rods, manual shifting is not required, the labor intensity is reduced, and the installation is rapid and accurate.

The invention discloses a jump catch clamp, an integrated tool for jump catch riveting and flanging and a machining method thereof, and the jump catch clamp is a special clamp. The tool disclosed by the invention comprises an upper die, a guide post, a guide post spring, a base plate, sliding block assemblies, a first lower die upright post plate and the jump catch clamp, wherein the guide post is serially connected to the upper die, the first lower die upright post plate and the base plate; the guide post spring is arranged on the guide post in a penetrating manner; the jump catch clamp can be inserted in a drawer groove in the middle part of the base plate; the sliding block assemblies capable of moving horizontally are arranged on the left side and the right side of the jump catch clamp; a riveting punch is arranged on the side, close to the jump catch clamp, of each sliding clock assembly, and an inclined wedge surface is arranged on the other side of each sliding block assembly; an inclined pressing block is arranged above each inclined wedge surface; the inclined pressing blocks are connected with the upper die; and the inclined pressing blocks are provided with inclined wedge surfaces matched with the inclined wedge surfaces of the sliding block assemblies. The jump catch can be assembled at a time, the riveting and flanging quality is reliable, and the production efficiency is improved.

A main body of an electronic part is formed in a rectangular pillared shape having a first and a second axial end surface. A first electrode is formed on the first axial end surface electrically and mechanically connected to a first wiring pattern formed on a board surface of a printed board. A second electrode is formed on the second axial end surface, to which one end of a fuse terminal is electrically connected. The other end of the fuse terminal is connected to a second wiring pattern of the printed board or a wiring member which is formed as an independent member from the printed board. A cut-off portion is formed in a connecting portion of the fuse terminal.