Abstract: A thin film bar resistor comprises: an insulative substrate, a pair of conductive thin film resistor terminals spaced apart on the substrate, an approximately square thin film resistance body disposed on the substrate between the terminals to be separated from them by guard margins, the body consisting of lower and upper layers of unanodized and anodized tantalum nitride, thin film regions of unanodized tantalum nitride in the guard margins to connect such body to the terminals, and thin film conductive leads connected to the terminals.

Abstract: A circuit for selectively lighting one of a pair of light-emitting diodes (LEDs) arranged in a parallel, back-to-back, circuit configuration also known as an anti-parallel circuit configuration. One side of the configuration is connected with ground connecting means through a first photon-emitting device which device is optically coupled to a first photon-responsive device connected between the other side of the configuration and a current source. The other side of the configuration is also connected with a ground connecting means through a second photon-emitting device which device is optically coupled to a second photon-responsive device connected between the first side of the configuration and the current source.

Abstract: There is disclosed a control system for stopping a punch press and comprising first and second proximity sensor-amplifier combinations responsive to the cyclical movements of respective parts of the press to generate respective cyclical signals having respective recurrent digital waveforms which remain invariable while the press and such combinations operate normally. A device responds to a misfeed in the stock strip to change the waveform of the first signal. The two signals are fed to logic circuits which respond either to a change in waveform indicative of such fault or to a change in waveform indicative of malfunction of either combination to produce a signal for stopping the machine.

Abstract: Electrical contact tape having a base portion of nickel, copper or nickel-copper alloy and an overlay of metallic material on said base portion is improved by utilizing for such overlay a gold-nickel alloy of which the precentage by weight of nickel is in the range of from about 1.8% to 2.3%, the balance of the alloy being gold with or without one or more other metals other than nickel in trace amounts insufficient to produce precipitation thereof out of solution in the gold. Nibs of such tape are bonded to a leaf spring to form an electromechanical junction therewith, the gold-nickel alloy overlay of the nib being on its side away from the spring to provide an improved electrical contact surface for the spring contact assembly formed by such nib and spring.

Abstract: There is disclosed a switch-hookless telephone set having a housing in the configuration of a handset housing, a cord, a plug and, within the housing, circuitry comprising: a ringing network including a ringing oscillator, a voice network, a receiver, a magnetic transducer performing during voice mode operation of the set as an electroacoustic transducer, and a bistable snap-action OFF-ON switch having an actuating button exposed outside the housing. The switch is coupled to the network and transducer so as, when in a first or "ringing mode" position, to connect the ringing network to, and disconnect the voice network from, the leads in the cord while connecting and disconnecting the transducer to and from, respectively, the ringing oscillator and the voice network, and so as, when in a second or "voice mode" position, to effect the converse connections and disconnections. When the transducer is connected to the ringing oscillator, the transducer is responsive to tone signals therefrom to emit ringing sounds.

Abstract: Method and apparatus for providing a timed sequence of different recorded announcements to an incoming caller to hold the caller's attention in a telephone system when no operator is available to answer the incoming call. During intervals in the timed sequence when no announcement is connected to the incoming caller, music is transmitted. When an operator becomes available to answer the call, the incoming caller is disconnected from the recorded announcement or music, whichever is applicable, and connected to the idle operator.

Abstract: There is disclosed a releasable lock mechanism for an extension ladder comprising a bell crank lever attachable to a fly rail of the ladder through a first pivot, and having first and second joined arm segments extending generally forward and downward, respectively, from their juncture. The first arm segment has at its front a head movable by pivoting of the lever between first and second positions at which the head will and will not, respectively, engage base rungs of the ladder. A tongue with a tip is attached to a lower part of the lever's second arm segment through a second pivot. Attachable to the rail is a frame operable during downsliding of the ladder's fly section to guide translatory movement of the tongue so that strikings of its tip by base rungs of the ladder are effective to pivot the lever to permit its head to pass by such rungs. When the lever head engages the top of a base rung to lock the fly section from downsliding, the tongue is held against flapping about the second pivot.

Abstract: A method and apparatus for testing a plurality of electrical circuit devices (100a . . . 100n FIG. 4) to determine individual device failures wherein the input, (110-117) output (118-121) and power leads (130) of each device are interconnected with corresponding input, output and power leads of the other devices to form common input, output and power leads. The ground lead (140 . . . 140n) from each device is individually connected with test apparatus (102). Test signals are introduced onto the common input (110-117), output (118-121) and ground leads (130) and signals, responsive to the test signals, are monitored on the individual ground leads (140 . . . 140n) by test apparatus 102 to determine individual device failure.

Abstract: Test equipment for measuring the amplitude of certain a.c. signals and comprising, a signal processing means responsive to each of such a.c. signals for transforming that signal into a d.c. level signal of a magnitude proportional to the r.m.s. amplitude of the a.c. signal, an analog to digital converter responsive only to those of such d.c. signals having magnitudes within an acceptance range for the converter to provide binary indications representative of such magnitudes of those signals, and circuit means for causing only d.c. level signals derived from a.c. signals with r.m.s. amplitudes in a subrange of a full range of such amplitudes to fall within the acceptance range of the converter.

Abstract: There is disclosed a click disc switch assembly comprising a plate-like base having on it copper foil paths including (a) "row" paths each including a respective row of contact pads in a row-and-column matrix of such pads on the base, and (b) "column" paths corresponding to the columns of the matrix and including respective bonding pads. Overlying the columns of the matrix are click disc strips having end tabs welded to the bonding pads. Interposed between the strips and the "row" paths is an originally liquid and subsequently solidified coating deposited on the base to cover portions of the row paths while leaving uncovered their contact pads. The base and the strips include holes used to align the latter on the former.

Abstract: A section (21) of tape (20), having an adhesive side (22), is advanced from a roll (18) and is held tautly beneath a plurality of tubes (86). The section (21) of tape (20) is vacuumly gripped on the adhesive side (22) by the tubes (86) and is thereafter severed from the roll (18). The tubes (86) are then moved to accurately place the severed section (21) of the tape (20) onto a tape support surface (44). Vacuum is removed from the tubes (86) and is applied to the surface (44) to facilitate the transfer of the severed section (21) of the tape (20) to the surface.

Abstract: An inductor coil comprises a main winding of insulated wire on the barrel of a bobbin having two axial lugs salient from one of the bobbin's end flanges, and having two recesses formed in the outer surface of the other of such flanges. A coaxial array of such bobbins is mounted on a rotatable spindle axially salient from a rotatable driving head such that the bobbins are, by such lugs and recesses, mechanically coupled together and to said head. The head is rotated to produce through such lugs and recesses a rotation of such bobbins utilized to form such main windings thereon. The lugs of each such bobbin supported elongated plastic arms having bifurcated outer ends around which are formed wire windings providing terminals for the main winding of the coil.

Abstract: There is disclosed an electroplating apparatus in which a plurality of anodes and twice-as-large plurality of first and second cathodes are disposed in a cell such that each anode has on its opposite sides a first cathode and a second cathode, respectively. First and second adjustable constant current sources supply current to, respectively, all first cathodes and such anodes and all second cathodes and such anodes. A plurality of current adjusting units respective corresponding to the anodes are connected on the positive side of each such current source between that source and each respective anode. The anodes are permanently installed in the cell, while the cathodes are carried by a holder fitting over the top of the cell and removable therefrom. The cathodes may be selectively inserted into guideways in their holder and then locked in place in these guideways until removal of the cathodes is desired, when they are unlocked.

Abstract: Apparatus for effecting a drop wire splice comprises an enclosure having a pair of channels with each channel extending from an entrance end to an exit end. A partition is located between the channels and a ramped surface is located on a wall of each channel opposite the partition with the ramped surface widening each channel as it extends from its entrance to exit end. Embedded in the partition are a pair of electrically conductive terminals each of which comprises tangs extending into each channel at an angle inclined toward the exit end. The apparatus further comprises a pair of wedges for insertion into the exit end of each channel.

Abstract: An electrical connector pin is formed from a unitary piece of strip so as to be in the shape of an elongated tubular member with terminal and contact sections at opposite ends, and with an unbonded seam extending between those sections. The terminal section has in it a scoop depression adapted to receive a lead and solder for bonding the lead to the pin, the wall portion which bounds the scoop being interposed between the scoop's interior and the seam to prevent solder in the scoop from reaching the seam and wicking therealong. The pin is adapted to be inserted into the insulating support member of a multi-pin connector, and the pin has forward and reverse motion stop tabs for locking the pin in place in such member. The contact and terminal sections of the pin are selectively coated with, respectively, a corrosion resistant layer and a solderability promoting layer.

Abstract: Apparatus 30, FIG. 2 for severing an article 12 from a carrier strip 10 and for positioning the severed article is disclosed. The apparatus includes a die 33 having an aperture 32 exiting therethrough from an entrance end 35 to an exit end 36. A ramped shaped wall 37 is located on one surface of the aperture to taper the aperature as it extends from the entrance end to the exit end such that the exit end has a rectangular block "C" shaped opening. A punch 31 in axial alignment with the aperture for entering into and extending through the aperture, has a cavity 43 on one surface to accept ramped shaped wall 37 as punch 31 extends into aperture 32 and to form a block "C" shaped surface on the bottom face 42 of punch 31. When an article 12 is placed between punch 31 and aperture 32 and punch 31 is moved into the aperture, article 12 is severed from carrier strip 10 and is pushed by face 42 into the aperture.