Abstract:
A stiffener in the form of a metal-cored stiffener plate is temporarily secured to the underside of a printed circuit (PC) board having a series of integrated circuit (IC) chips and other electronic components and metallization interconnect traces on the upper or top surface of the board. Securing of the stiffening plate and PC board is provided by segments of a hook/mushrooms-containing flexible tape adhered to the PC board underside by suitable adhesive. A complementary sheet of a hooks-containing flexible material is adhered to the stiffening plate such that upon pressing of the complementary material and segments together the respective hooks and loops interlock binding the PC board assembly and stiffening plate assembly together. The securement can be easily undone by grasping and levering the edge of the stiffening plate from the PC board and breaking the interlock of the hooks and loops. The hooks and loops may be reversed on the stiffener plate and on the solder-side of the PC board. They may be the well-known complementary Velcro.RTM. materials.
Abstract:
A circuit board is aligned with the housing so that a mounting pin may be inserted through a circuit board mounting hole into a housing mounting bore. The pin is heated when inserted into the bore so that solder at the bottom tip is in a melted state. After the pin is in the bore, the solder fuses and secures the pin in the bore. Accordingly, the pin head secures the electrical circuit board to the housing.
Abstract:
A conforming heat sink assembly including a heat dispersive element is mounted in spaced relationship to a surface from which heat is to be conducted. A thermal interface is provided for coupling the heat dispersive element to the surface from which heat is to be conducted. The thermal interface includes an elastomeric member which occupies only a portion of a volume defined by mounting the heat dispersive element proximate the surface from which heat is to be conducted. The unoccupied volume allows the elastomeric member to easily conform to the irregular surface from which heat is to be conducted to enhance thermal conductivity from the surface to the heat dispersive member.
Abstract:
An electronic circuit component housing assembly adapted to be mounted mechanically on a printed circuit, using a single mechanical fastener to attach the circuit component housing assembly in a unique alignment with the printed circuit, and simultaneously using the fastener to provide force to press physically compliant electrical contacts included in the circuit component housing assembly into electrical contact with terminal contact pads on the printed circuit. Several electronic circuit components may be housed in separate hermetically sealed cavities and can be biased independently of one another. Thermal conductors are included in the base member and a convection cooler is mounted atop the assembly. The mechanical fastener also acts as a thermal conductor. A test probe assembly including multiple contacts mounts on the electronic circuit component housing.
Abstract:
An inlet type noise filter which can be directly mounted to a substrate or the like includes a casing, a pair of output terminals, a ground terminal projecting from a surface of the casing and a retaining portion projecting from the same surface of the casing that the terminals project from. The retaining portion extends through bores in the substrate and engage the substrate to secure the noise filter to the substrate. The terminals can then be operatively electrically connected by soldering or the like to conductive patterns on the substrate.
Abstract:
A method of connecting a coil as mounted in an electric watch or clock in which a lead wire of the coil is made to cross a conductor near the terminal portion of the coil. The lead wire is drawn so as to traverse beyond a conductor to which it is to be attached, and the lead wire is anchored by an anchoring device so as to hold it against the conductor. The lead wire is then bonded to the conductor at the point of traverse.
Abstract:
A substrate which serves as an element for building an electronic module for ordnance applications comprising a body portion, for receiving electronic components, and a plurality of tab means extending therefrom for interlocking with complementary tab means on another similar substrate. The tab means may extend from the top, bottom, and/or sides of the substrate, and serve to mechanically and electrically interconnect with complementary tab means or apertures on adjacent substrates to form an electronic module of high mechanical strength and reliability. Such an electronic module may be assembled from at least three substrates. Each substrate has at least two tab means on each side edge thereof.
Abstract:
The assembly includes at least two pieces of material, each having a hole therein aligned with the hole in the other piece of material, and a plastic eyelet positioned in the holes and having a radially extending flange on one end thereof which engages one piece of material and a rolled over rim at the other end thereof which engages the other piece of material to hold the pieces of material together. The method includes the steps of: assembling the pieces of material with a plastic sleeve positioned in the holes, the sleeve having the radially extending flange on one end with the other end of the sleeve extending beyond one piece of material; holding the flange against one piece of material while raising the temperature of the extending end of the sleeve above its softening temperature; and simultaneously shaping at least a part of the extending end of the sleeve into the rolled over rim which extends radially from the extending end of the sleeve and in abutment with the other piece of material.
Abstract:
A package including at least one hole extending through the entire package and hermetically isolated from the package contents, the package being formed by stacking a plurality os subassemblies between two face sheets of impervious material and aligning the contents by at least one vertical pin through which the hole passes. The package is bonded subsequent to stacking and is clamped together during bonding by a pair of pressure plates, the plates being removed upon completion of bonding to allow the final package to be positioned and aligned in an external apparatus.
Abstract:
An electric motor assembly includes a stator, a rotor, a motor housing, a rotatable shaft, a radial fan, and an air scoop. The motor housing at least partly houses the stator and rotor and presents an exterior motor surface. The rotatable shaft is associated with the rotor for rotational movement therewith, with the rotatable shaft extending along a rotational axis. The radial fan is mounted on the rotatable shaft exteriorly of the motor housing and is rotatable with the shaft to direct airflow in a radially outward direction. The air scoop extends radially outwardly relative to the radial fan and axially to receive radial airflow from the radial fan and turn the airflow axially to flow along the exterior motor surface. The air scoop includes spaced apart axially extending airflow vanes to guide the airflow as the airflow is turned axially.