Abstract: A clamp for electrical cables including a body portion of stamped metal. The body portion has two end walls extending at right angles to the base. At least a first pair of arms spaced intermediate along one edge of the base. The arms also extend outward at essentially right angles to the base such that they are parallel to the end walls. An arm and an associated end wall form a first channel. The movable jaw interfits below the arms and when tightened comes into compressive engagement with the cables in the channel.

Abstract: A scale plate with one or more load cell structures formed integrally therewith. Each load cell includes a flexure beam with strain sensing means mounted thereon and a fixed end merging with the plate. A support member has a free end and another end that is fixed to and merges with the other end of the beam. The load is applied between the plate and the support member. The support member permits the point of load application to be selected for improved output response of the load cell. A second flexure beam may be provided to counter any torsion effects on the first mentioned beam. The beam and support member are formed by cutting slots in the scale plate.

Abstract: A credit only paystation for allowing a user to place telephone calls therefrom without having to use coinage coins. The paystation includes a reader to read the users credit information which may be encoded on the magnetic stripe of a conventional credit card. The paystation uses a microcomputer to process the credit information and the dialing information entered by the user. The paystation also allows the user to dial a plurality of nonrestricted numbers without having to use a credit card. The paystation is powered solely from the central office to which it is connected and keeps the transmitter turned off until it is needed.

Abstract: A power supply is provided for supplying regulated power to an output from an unregulated DC voltage source. The supply includes low and high power series resonant converters, each including a pair of power switches which are alternately turned on and off for completing a series resonant circuit with the source and with a primary winding of a transformer coupled to the output. A switch control responds to loading of the output and drives the switches on and off at an operating frequency that varies with the loading. A converter control monitors the operating frequency and controls operation of the converters such that one or both converters operate in dependence upon loading to avoid operation within a particular frequency range.

Abstract: A locking system for a flood cover having a rigid mouth. The system has a pair of oppositely opposed locking mechanisms. Each leg mechanism includes a stiff leg portion whose length is greater than the air space that would result if the closure over which the cover is to be placed were centered in the cover. A spring holds the stiff leg essentially parallel to the mouth before the cover is placed over the closure. As the cover is placed over the closure the stiff leg pivots and the tension of the spring increases.

Abstract: A circuit arrangement for FETs connected in parallel. In the arrangement the same electrode of N FETs (N>1) is connected by associated metallic conductors to a central conductor. A further metallic conductor is also connected to the central conductor. The shape of the central conductor is such that the FETs are mechanically equidistant from the connection of the further conductor. This equalizes the fall times between the FETs without the need to add any physical inductors to the circuit.

Abstract: A seal for a bearing having a housing with an opening therein for receiving a shaft in which a bearing assembly is mounted in the housing and has an inner race for receiving the shaft. A seal consisting of a ring having a radially extending, outwardly facing flat surface is disposed in the housing opening adjacent the inner race, and a seal which may be of the V-ring type is mounted on the inner race and has a lip which seats on and rubs against the radial surface of the ring. Collars may be used on the race to retain the lipped seal in proper relationship with the ring on the inner race. The relationship of the lip to the metal ring is such that the bearing assembly can be purged by the outward flowing of the lubricant yet protected from the ingress of foreign matter. In some modifications, an auxiliary seal, which is disposed externally with respect to the lipped seal, may be used.

Abstract: The present invention relates to an improved scale arrangement comprising three or more load cells which are compensated for both lateral and longitudinal displacement of the load on the scale platter or platform and to a method of accurately compensating the scale so that the output of the scale is independent of the position of the weight on the scale. Only two strain gages are provided for each load cell which gages are connected in a single bridge circuit. Compensating resistor networks are connected to at least certain of the strain gages.

Abstract: Circuitry for use in a power supply of the type which includes a power switching means and uses a waveform of predetermined shape to control the power switching means such as in a first mode the supply regulates its output voltage and in a second mode controls the current in the power switching means. The circuitry attempts to turn the supply off in response to an overvoltage condition at its output and failing that provides a short circuit path so that current sufficient to cause the fuse in the output to open will flow therethrough.

Abstract: An arrangement of distribution and feeder field terminal blocks for mounting in an enclosure of a cross-connect terminal. The arrangement encourages and facilitates minimal routing of jumpers connecting cable pairs in the feeder field to cable pairs in the distribution field. The feeder fields are arranged in two parallel columns located substantially in the center of the enclosure. The distribution fields are located along the periphery of the enclosure in two columns and/or rows which are parallel to each other and separated from each other by the feeder fields.

Abstract: A shaft alignment device for use in aligning two opposed, rotatable shafts connected by a shaft coupling is disclosed, having magnetic base portions adaptable for mounting on the shafts, hubs, or on auxiliary structures secured to the shafts or hubs. The device includes fixed bracket members with pivotally mounted swivel blocks therein. Extension beams project across the coupling from each swivel block to a reference surface on the facing bracket, and measurement indicators measure the degree of deflection of the swivel blocks. A leveling device indicates the relative position of the alignment devices for taking measurements at 0.degree., 90.degree., 180.degree., and 270.degree., and the coordinates obtained are used to plot the aligned positions of the shafts.

Abstract: A compensated circuit for use in interfacing a transmission device to a cable facility. The circuit includes a transformer one winding of which is connected to the cable facility and the other winding of which is connected through an impedance generating device to the transmission device. The circuit provides a predetermined one of a number of selectable impedances to the cable facility. The impedance generating device allows the desired impedance to be elected and includes a negative resistance generating circuit which responds to the current flowing in the loop formed by the winding and the impedance generating device.

Abstract: A circuit for use in a power supply of the type which regulates the voltage at a load remotely connected to the output of the supply. The circuit allows the voltage at the load to be sensed so that the voltage control loop of the supply can control the load voltage in a relatively accurate manner. The circuit also provides means to detect the breakage of any one of the sense leads.

Abstract: A demodulator for demodulating a received signal which has been modulated in accordance with a modulation scheme which falls within the class of APK modulation. The demodulator uses a phase locked loop (PLL) to recover the carrier. A ROM in the demodulator provides information in both the sweep and locked modes of operation of the PLL to control the PLL. The ROM also provides at its output the digital data which has been encoded at the modulator in accordance with the selected APK scheme. The information stored in the ROM is uniquely determined by the signal points associated with the selected scheme. A modulator for generating the modulated signal received by the demodulator is also disclosed.

Abstract: An elastomeric shear shaft coupling is disclosed for connecting two rotatable shafts in end-to-end relationship. The coupling includes hubs for mounting on the opposed ends of the shafts and a flexible element extending between the opposed hubs. Clamping members and suitable fasteners are used to secure the element to the hubs for transmitting the torque developed by the driving shaft to the driven shaft. The flexible element has a bead of harder material than the body of the element, disposed within or at the margins of the element in the locus of clamping, and is reinforced with a matrix of plies or layers of a suitable fabric material.

Abstract: A coupling alignment system for use in aligning coupled, rotatable shaft members. The system includes coupling hubs mounted on the opposed shafts and modified to receive bracket members. A pivotally mounted beam extends from one bracket member to the opposite bracket member or coupling hub, and a measurement indicator, mounted on the bracket member, registers the degree of deflection of the beam relative to the bracket or hub on the opposite side. No shaft access is required, since the brackets are secured directly to the coupling hubs, and the measurement indicator mass is firmly supported by the bracket, minimizing indicator sag. The present system includes angular, radial, and axial bracket mounting embodiments, the system, thereby, greatly facilitating alignment procedures in the field.

Abstract: A bearing lubrication device for use in ring-oiled journal bearings and the like in which a generally circular ring member is disposed around the rotatable shaft in the bearing assembly and has a circumferential groove in its inner surface. A cantilevered leaf member projects into the groove in the ring member to separate the lubricant from the ring as rotation occurs, thus providing greater lubricant delivery, improved bearing performance capability, and stabilized performance at high journal speeds.

Abstract: Water-resistant weighing apparatus comprising a load cell having a plate, one or more beams with fixed ends connected to the plate and strain sensing means on the beams. A platter is supported by the beams for receiving a load applied between the plate and the beam. The platter encloses the top and sides of the load cell and a shield is connected to the bottom of the platter and encloses the bottom of the load cell. A gasket is provided to seal the interface between the platter and the shield. A plurality of feet are provided for contact with a support surface. Bushings extend through the shield and connect the plate to the feet and sealing boots are provided to seal the openings in the shield for the bushings. The shield may include a vent to expose the load cell to atmospheric pressure and a sub-base plate may be provided to deflect moisture from the bottom of the shield and the vent.

Abstract: A split, circular flanged bushing for securing driving or driven elements such as sheaves, pulleys, and the like to a rotatable shaft, having an integrally formed key in the center opening of the bushing for insertion in a corresponding keyway in the shaft. The bushing is formed in a sintering operation and increased density is imparted to fillets or junctions between the flange and the outer wall of the body, thereby providing increased resistance to stress fatigue in these critical areas. Fillets between the key and the inner wall of the body are provided to distribute the stress concentration inherent in these areas.

Abstract: Circuitry for use in a power supply of the type which includes a power switching means and uses a waveform of predetermined shape to control the power switching means such as in a first mode the supply regulates its output voltage and in a second mode controls the current in the power switching means. The circuitry synchronizes the frequency of the waveform to the master clock frequency of the load connected to the supply.