Abstract:
An electrical switch formed of a single flexible printed wiring element having a plurality of circuits to be selectively coupled and a shorting circuit. The flexible printed wiring element is folded upon itself such that the circuits to be coupled and the shorting circuit are facing. An actuator is provided to selectively urge the shorting circuit into and out of contact with the circuits to be coupled. Sliding and pushbutton embodiments of the invention are described.
Abstract:
A plurality of printed wiring cards each having a conventional rear connector portion for insertion into one of a plurality of electronic equipment frames and first and second front access connector portions on which a predetermined plurality of electrical contacts at first selected positions on the upper portion are connected by the printed conductor pattern to a corresponding plurality of contacts on the rear connector portion and to a corresponding plurality of electrical contacts at second selected positions on the lower portion. A flat printed cable is connected from the upper connector portion of one wiring card to the lower connector portion of another wiring card in an adjacent electronic equipment frame to thereby couple said predetermined plurality of contacts at the rear connector portion of each of said plurality of wiring cards to a terminating location.
Abstract:
A locking strap fastening device comprising an elongate strap body of a selected dimension and having a plurality of locking fingers extending outwardly from opposed sides thereof, adjacent locking fingers being tapered and spaced apart from one another by a distance no greater than the dimension of the strap body such that in a flexible embodiment the fingers at one portion of the strap may be locked about the strap body at another portion of the strap such as to encircle and retain articles to be bound together. Alternatively the invention may be used in a rigid form as a fastener.
Abstract:
There is herein disclosed a termination card for printed wiring cables wherein the cables are routed through apertures in a pair of cards which are fastened together to provide both cable clamping and strain relief. Electrical coupling is provided by the cables themselves without any electrical connection to the termination card.
Abstract:
A device for connecting the leads of electrical components to plated through holes in a printed wiring card wherein two overlapping lead deflector elements are disposed such as to be laterally translatable with respect to one another. A cam locking post operates to translate the deflector elements which engage the component leads and urge them into electrical contact with the plated through holes in which the leads are inserted.
Abstract:
The invention relates to a cable tensioning device for controllably adjusting the tension in a flexible cable which comprises a spool having a bore extending through its entire length, a cable guide means at its first end face and a rotatable member at its second end face having a bore aligned with the spool bore and a means for bearing against the cable. The cable tensioning device additionally comprises a locking means for locking the rotatable member in fixed relation to the spool so that with a cable threaded through the bores from the first end face and over the outer periphery of the rotatable member bore and spool past the rotatable member cable bearing means and the first end cable guide means, and again through the spool bore from the first end to the second end and through the rotatable member bore, as the rotatable member is rotated relative to the spool, the flexible cable is wound around the spool and thereby placed under controlled tension. In a preferred form the rotatable member is spring loaded in relation to the spool to provide a constant tension on the cable. In an alternative preferred form, the rotatable member in addition to the spring comprises a pawl arrangement to thereby maintain a minimum tension on the cable. In an additional alternate preferred form both end faces are rotatable with either a spring loading or pawl arrangement provided.
Abstract:
A bus system arranged such that the number of interconnection points between subsystems or modules are substantially reduced so that interfacing costs likewise are reduced. The multiple for continuing the bus is located on an interface connector card which provides an interfacing between the bus cable and the subsystem or module, so that the continuity of the bus can be maintained, regardless of the system status of any subsystem or subsystems. Normally, with other similar bus systems, the continuity of the bus is disrupted if a subsystem is taken out of service. Furthermore, unlike many other bus systems, the bus can be extended in vertical and/or horizontal directions. The bus system also is such that the bus can be easily terminated by simply inserting a terminator card on the interface connector card, or it can be extended by withdrawing the terminator card and plugging in a bus jumper cable with a terminator card at the last module.
Abstract:
A planar diode matrix memory includes a pluggable wire strap to couple a diode between an input conductor on a printed wiring card and output bus bar. The rearrangement of the diode couplings is easily made via rearrangement of the wire straps.
Abstract:
A spring clamp for longitudinally securing a cable comprises a housing with a rotatable cammed spring clamp disposed therein at a position adjacent a cable to be secured. Rotation of the spring clamp compresses the cable within the housing to thereby provide the clamping force. A tongue portion on the clamp is provided such that upon complete rotation it seats in a corresponding groove in the housing to lock the clamp on the cable.
Abstract:
A wire terminal includes a longitudinal strip of electrically conductive material having a plurality of longitudinally arranged fingers laterally spaced in two different planes and a pair of identical U-shaped encapsulating members arranged to mate in locking relationship, each having a plurality of longitudinally arranged cavities divided by abutment walls. The cavities are formed to receive the extending fingers and have converging top and bottom walls so that when the members are locked together, the fingers are placed in spring tension by the converging walls to maintain a constant contact force on a wire placed between the fingers to securely hold the wire in place against the abutment wall and to make intimate electrical contact with the wire.