Abstract: A standoff for mounting two or more printed circuit boards to a chassis in which one keyhole cut printed circuit board may be slidably mounted on the keyhole mount of the standoff and a second printed circuit board may be mounted on the top portion of the standoff spaced away from the first printed circuit board. The second printed circuit board may be affixed to the standoff by either a screw mount, snap lock mount, adhesive, bolt and nut, clamp or other method.

Abstract: There is disclosed a fastener useful for the precise positioning of a plurality of plates in a parallel, spaced-apart array. The fastener has a cylindrical standard with distal fixed abutments and carries a plurality of spacers that are axially adjustable on the standard. At least one spacer is axially extendable, and has a user-adjustable cam to control its axial length, thereby accommodating for variable thicknesses of the intermediate plates. The fastener is disclosed as particularly useful for the precise orientation of the parallel plates of a fixture used in equipment for automated testing of printed circuit boards.

Abstract: A standoff connector for fastening two plates in spaced relation, including a body and a stud for insertion into the body. The body has a base and a trunk projecting upward from the base, and also has a central opening for receiving the stud, with a sleeve carried in the central opening with a plurality of spaced resilient fingers having upper ends fixed in the trunk and lower ends spaced from the trunk for outward radial movement, the lower ends of the fingers having inwardly directed tips for gripping the stud. The stud has a shaft for positioning in the body opening and a handle at one end for rotating the stud, with a shaft having a major diameter adjacent the other end and a minor diameter between the major diameter and the handle for receiving the tips of the body sleeve, with the body and stud having interengaging elements for limiting rotation of the stud in the body.

Abstract: Disclosed is an AC electrical apparatus including a vibrating device and a mounting structure supporting the device. In the improvement, a resilient insulator is interposed between the device and the mounting structure so that vibrations are isolated from the mounting structure. In a highly preferred embodiment, the insulator has a disc-like component between a standoff spacer and the mounting structure. Another such component is between the mounting structure and the head of the bolt which attaching the device to the structure. And a tube-like component of the insulator is between the bolt and such structure.

Abstract: A power semiconductor device having power chips mounted on a metal insulating substrate and terminal plates corresponding to inner connection wiring for a main circuit of the device. Electronic parts forming a control circuit are mounted on a second substrate disposed over the first substrate and supported by the terminal plates. Additionally, it is preferable to use a copper plate as wiring material for the main circuit.

Abstract: A wireholder includes a main body portion, an attaching portion, and a tool receiving portion. The main body portion is arranged to receive a wire to be secured to a structure. The attaching portion is affixed to the main body portion and has a configuration to facilitate the attachment of the main body portion to the structure. The tool receiving portion is arranged to receive an installing tool. The main body portion has a strength so that torque can be transferred from a power tool to the attaching portion through the installing tool and the main body portion. The installing tool is arranged to break if excessive torque is applied to the wireholder by the installing tool.

Abstract: A substrate to substrate interconnect and standoff assembly (10) comprises an electronic coupling (39) between the bottom of a first substrate (14) and the bottom of a second substrate (12), an electronic coupling (24) of the top of the first substrate to the bottom of the second substrate, a stand-off (20) between the first substrate and the second substrate, and a mechanical coupling (16) between the first substrate to the second substrate.

Abstract: The present invention pertains to standoff devices used to hold a circuit board a fixed distance from a mounting surface such as another circuit board. The present invention divides the standoff into two interacting members. The first member has a base and two arms disposed to define a receiving slot between the two arms. The second member is comprised of a head portion, a tapered portion, and a tongue portion. The second member is slidably disposed within the receiving slot of the first member, and is capable of being locked into place in two distinct locking positions within this receiving slot. By sliding the second member from the first locking position to the second locking position, the standoff is locked into place between the circuit board and the mounting surface. The present invention discloses a secure locking system utilizing locking projections and cooperating depressions to accomplish this locking function.

Abstract: A mother board for a computer provided with a plurality of keyhole shaped fitting holes with protective elements extending around and downwardly from the peripheral edges of the large elliptical portions for preventing the annular slots of posts used in securing a PC board to the mother board from seizing the edges of the large elliptical portions during removal of the PC board. An interface rack is integrally formed with the mother board and provided with a plurality of main slots for receiving interfaces therein, each main slot terminating in an insertion slot formed between a positioning plate and the bottom of the interface rack for guiding and securing the interface to the rack.

Abstract: There is disclosed a circuit change pin and a circuit board assembly. The circuit change pin is a termination post which is held in a compliant electrically insulating base. The base is made from a heat-recoverable material which is preferably a poly(aryl ether ketone). When the circuit change pin is used in conjunction with a printed circuit board, there is then a circuit board assembly.

Abstract: An improved electrical terminal designed to eliminate arcing and corona effects has a substantially spherical post with one or more circumferential slots perpendicular to the longitudinal axis of the terminal. In one embodiment, each slot is adapted to receive a wire of predetermined gage in a close-fitting wrapped configuration. The outer diameter of the wire does not extend beyond the circumference of the sphere. The number and size of the slots depends on the number and gage of the wire(s) to be connected. More than one wire can be connected in a single slot, either by wrapping the wires concentrically or in parallel planes within the same slot. Solder is applied to the wrapped wires to form a secure, smooth and rounded connection.

Abstract: An insert of a material to be electrically and thermally insulating enters into and is joined to a socket-shaped metallic base which in turn is fastened to a structure through a hole in the structure. The base is undercut, and the hole in the structure is filled when the base is fastened to the structure. An embossed lip on the socket is deformed inwardly to attach to a shoulder on the insert when the insert is bottomed in the socket.

Abstract: A post type electrical terminal having at one end at least one channel for receiving electrical wires. This channel follows a nonlinear path so as to impose a bend in any wire inserted therein.