摘要:
A safety device is included in a circuit comprising a power source and a user device. The power source has one terminal connected to ground, as does the user device, with the safety device connected in a conducting path leading to the ground in the user device. In the event of an incorrect polarity connection between the power source and user device, a current path through the safety device and to ground is established.
摘要:
A circuit fuse assembly comprising a plurality of fuse elements which are simultaneously formed using printed circuit or through hole plating techniques and including means for easily substituting a different one of the plural fuse elements when the in-circuit fuse element burns out due to an overload current condition. In the preferred embodiment, the fuse assembly is (a) integrally formed with the printed circuit of the fused electrical apparatus and (b) formed with a common electrical connection such that a single electrical bridge of solder or other means enables substitution of a replacement fuse element. Other embodiments of the present invention provide a restorable printed circuit fuse for use in standard fuse holders, in-line plug connectors, conventional three prong plug connectors, edison bases, and plug-in triple outlets.
摘要:
A fuse is described in which two fusing modes provide protection at low and high overcurrent conditions. The fuse comprises an oriented plastic substrate with a conductive layer adhered thereto.
摘要:
A current-distributing arrangement for electrical components includes an electrical circuit board having opposite sides, and conductive paths at one of the sides. A mounting member is mounted at the other of the sides. This mounting member has first wall portions which bound first sockets, and second wall portions which bound second sockets and which are raised relative to the first wall portions in direction away from said one side of the board. Spring contact members each having resilient contact portions are located in the second sockets for receiving electrical components therein with which electrical contact is made. Each spring contact member has a solderable portion connected with the contact portions and extending away from the latter in direction from the other side of the board towards and beyond said one side thereof so that solder contact may be made with the conductive paths only at said one side of the board.
摘要:
A junction box for a motor vehicle electrical system for coupling electrical conductors extending from the rear of a vehicle with conductors extending to the front of a vehicle, comprising an integrally moulded body having removable end, top and bottom walls and an intermediate plate which can be slidably engaged in guides in the side walls of the body. The removable end and bottom walls are provided with connector units for connecting electrical conductors of the external circuit to the junction box. These connector units are interconnected internally by flexible printed circuit connectors which also make contact with actuating elements, such as relays, and with printed circuit fuses mounted in sheets on pivoted support plates by means of which fuse changing is facilitated.
摘要:
A rectangular sheet of flexible insulation has metallic ribbons diagonally disposed thereon with the ends of adjacent ribbons aligned for juxtaposition when the sheet is formed into a cylinder and the ribbons form a helical fusible element for interconnecting end terminals of an enclosing insulating fuse housing.