Abstract: A high-speed, high temperature electrical heater construction, including an elongate air-tunnel, and a plurality of PTC resistance members insulatedly mounted in the walls of the air tunnel, and extending transversely thereof. The PTC resistance members have oppositely disposed terminal portions for connection to an electrical supply, for energization of the members.

Abstract: A high-speed high temperature electrical resistance heater and method of making the same, said heater being in the form of a uniquely configured composite, non-homogeneous body having an esentially electrical-conducting material and an essentially electrically insulating material, wherein one of the materials is constituted as a porous matrix, and the other of the materials permeates the matrix of the one material. The electrically-conducting material has nodes and connective threads interconnecting the nodes, and electrical connections can be made to different places on the electrically-conducting material. The method involves forming a sintered matrix and impregnating the same with a ceramic substance, then sintering the impregnated matrix.

Abstract: A one-piece clamping shell for electric cigar lighters, which comprises a rolled sheet-metal body of tubular configuration, having open ends and a reverse-bend clinched seam extending longitudinally between its ends. At one of its ends the body has a radially inwardly extending flange means configured as a one-turn helical thread, said flange means having notches in it, one of which is bounded by edges that are located in planes spaced axially apart an amount essentially equal to the pitch of said thread, thereby to constitute in effect a nut adapted to be screwed onto an externally threaded shell at the rear of the cigar lighter.

Abstract: A composite clamping shell for securing the socket of an electric cigar lighter to a panel of an automobile, has a rolled sheet-metal body of tubular shape, with open ends and a clinched seam. Attached to the body is a drawn, sheet metal sleeve having a rolled screw thread. The body has inwardly displaced stop shoulders to position the sleeve, which latter has an annular out-turned flange abutting the stop shoulders. Edge portions of the body end are laid over the out-turned flange of the sleeve to hold it captive and prevent relative movement. The body is stamped out of a piece of flat sheet metal stock and thereafter rolled into the desired cylindrical shape. The sleeve is produced by drawing operations, from flat stock, reduced manufacturing cost is thus realized.

Abstract: A composite clamping shell for securing the socket of an electric cigar lighter to a panel of an automobile, has a rolled sheet-metal body of tubular shape, with open ends and a clinched seam. Attached to the body is a drawn, sheet metal sleeve having a rolled screw thread. The body has inwardly displaced stop shoulders to position the sleeve, which latter has an annular out-turned flange abutting the stop shoulders. Edge portions of the body end are laid over the out-turned flange of the sleeve to hold it captive and prevent relative movement. The body is stamped out of a piece of flat sheet metal stock and thereafter rolled into the desired cylindrical shape. The sleeve is produced by drawing operations, from flat stock. Reduced manufacturing cost is thus realized.

Abstract: A chime generator circuit of the type employed to monitor the condition of parameters associated with an automobile, such as warning functions involving headlight operation, fastening of a seat belt, or indications of the ignition key having been inadvertently left in place as the driver is leaving the vehicle, etc. The circuit employs an oscillator which is modulated at a relatively low frequency, on the order of one or two cycles per second, and a unique coupling arrangement for exciting one of the existing speakers of the automobile radio to provide the necessary audible sound. In the disclosed device, the output of a signal generator is fed directly to one speaker, and a switch is interposed in the line extending between the radio output and the speaker. When the switch is open, the radio and speaker are isolated from one another and the generator feeds the speaker directly, producing the desired sound and warning the driver that a certain condition exists.

Abstract: A glow-plug ignitor for diesel engines and the like, comprising a tubular body having external screw threads and an adjoining hexagonal formation by which a tool such as a wrench can be applied to the body to screw it into the threaded cavity of a cylinder. Next to the hexagonal formation is a spade lug connector for bringing current to the plug, the connector being so arranged as to permit the application of either a socket-type wrench or else a box-end wrench. The inner end of the body has an elongate projecting pin on which there is a tightly wound resistance coil that becomes incandescent when excited with the proper electric current. The valleys of the coil show higher temperatures, for a given heating current, due to the radiation and reception of radiated heat involving the opposed surfaces; therefore, starts at lower engine temperatures are improved.

Abstract: A glow-plug .[.ignitor for diesel engines and the like,.]. comprising a tubular body having external screw threads and an adjoining hexagonal formation by which a tool such as a wrench can be applied to the body to screw it into .[.the.]. .Iadd.a .Iaddend.threaded cavity .[.of a cylinder.].. Next to the hexagonal formation is a spade lug connector for bringing current to the plug, the connector being so arranged as to permit the application of either a socket-type wrench or else a box-end wrench. The inner end of the body has an elongate projecting pin on which there is a tightly wound resistance coil that becomes incandescent when excited with the proper electric current. The valleys of the coil show higher temperatures, for a given heating current, due to the radiation and reception of radiated heat involving the opposed surfaces.[.; therefore, starts at lower engine temperatures are improved.]..