Abstract: A logarithmic amplifier calibrator having a signal generator providing an exponentially decaying calibration signal and a pulse generator providing a sample pulse each time the calibration signal has decayed by a predetermined decibel (db) increment. More specifically, the calibrator includes a crystal which is excited to an energy level through a feedback loop having an amplification means whose gain is controlled by a voltage controlled attenuator. The decay characteristics of the crystal when installed in the calibrator are determined so that the time required for the crystal to decay over an entire calibration range is known. This time is then divided into a plurality of time increments, each time increment corresponding to a predetermined db drop in the calibration signal. Sample pulses derived from a high frequency, high stability oscillator in the calibrator are developed to correspond to each of the predetermined time increments.
Abstract: A hand operated tool for assembling electrical cables to an electrical connector which has a cable clamp for clamping a cable in position for termination with conductive contact means on the connector. A connector is properly located in position for receiving an electrical cable, and a pair of jaw members is mounted on the apparatus for movement in a transverse direction toward and away from the connector to engage and crimp the cable clamp onto the cable and provide strain relief therefor. A single hand lever is mounted for pivotal movement in a front-to-rear direction generally perpendicular to the direction of movement of the jaw members. A motion transmitting mechanism is operatively associated between the hand lever and the jaw members for moving the jaw members in response to pivotal movement of the hand lever.
Abstract: Terminal clip and electrode constructions are disclosed for use with lead wires of instruments such as medical monitoring instruments which employ electrodes for attaching to a patient. The terminal clip includes a conductive member having a hook portion for engaging a terminal portion of the electrode. The electrode includes a terminal portion for grasping by the conductive hook portion of the terminal clip, and a loop for embracing the terminal clip housing to hold the terminal clip in position and prevent relative movement between the conductive hook of the clip and the terminal portion of the electrode. The terminal portion and the loop of the electrode are fabricated of a collapsible-memory material, such as heat formed Mylar or the like. The terminal portion of the electrode is coated with a conductive ink for electrical connection between a patient and the terminal clip.
Abstract: A separable in-line fiber optic connector adapted for coupling a pair of optical fibers or a single optical fiber and a light source or detector. The fiber connector includes a terminal plug member having a through hole extending axially therethrough for receiving an optical fiber. The plug member is axially split so as to comprise first and second separate longitudinal portions defining the through hole which are transversely matable for clamping the optical fiber therebetween. The plug portions are interengageable in a manner preventing any relative axial displacement therebetween. A housing member receives the terminal plug member and confines the split portions to a mating position in which they firmly clamp the optical fiber. The separate longitudinal plug portions are transversely ribbed along at least an axial section of the through hole for engaging the optical fiber to prevent axial displacement thereof.
March 24, 1980
Date of Patent:
May 18, 1982
Bunker Ramo Corporation
Kevin J. Monaghan, Russell C. Schwickert, John J. Esposito
Abstract: An apparatus for removing the insulation from the end of an insulated electrical wire. A common disadvantage of this type of apparatus is that by clamping the insulation of the conductor on two sides, indentations and possibly even damage to the insulation may be caused. Further, owing to cutting into the insulation only from two sides, the piece of insulation to be removed cannot be cleanly cut prior to removal from the central conductor core. The present apparatus overcomes the above-described disadvantages and shortcomings and permits various types of insulation to be rapidly, cleanly, and simply, freed from the conductor core. The removal of the insulation is initiated by inserting the end of the wire into the apparatus, without fear of folding the end of the wire even in the case of very small diameters of the conductive core of the wire, whereupon the insulation is removed fully automatically.
Abstract: A novel communication system and means for interconnecting communication trunk lines to multiple communication terminals is disclosed. The interconnection apparatus includes multi-circuit connectors coupled to the trunk lines and connector members coupled to information transmission cables routed from the various terminal stations within the communication network. Means are provided for interconnecting the multi-circuit connectors or trunk lines to the connector members so that any one of the communication channels may be associated with any one of the stations simply by mating one of a plurality of relocatable connectors to any of the various connector members. The components of the interconnection apparatus are characterized by a modular construction and adaptable to factory assembly to thereby provide versatility and reliability beyond that obtained with prior art systems.
Abstract: The invention relates to screw-coupled electrical connectors. It is known to provide screw-coupled electrical connectors with means for providing an indication of the fact that the two parts are approaching or have reached the fully mated condition and for resisting subsequent rotation of the coupling sleeve in the uncoupling direction. However, this has been accomplished only with complex and expensive mechanisms such as movable balls mounted in a flange on the first connector part and a series of holes in a flange on the coupling sleeve.
Abstract: A device for providing strain relief for a cable extending into a connector. The device includes a body having a cable receiving opening extending therethrough and having structure for securing the cable substantially about the periphery thereof. The securing structure restrains the cable against rearward movement and is movable from an inoperative position to an operative position. The device further includes structure for moving the securing structure from the inoperative position to the operative position and structure independent of the securing structure for maintaining the securing structure in the operative position. With these features of construction, a fiber optic cable having an optical fiber terminated in a fiber optic connector can be provided with strain relief utilizing the device.
Abstract: A distributive coupler for use with at least one set of optical fibers includes a fiber optic terminal for supporting the end portions of each set of optical fibers. In a reflective mode, the coupler is adapted for use with one set of optical fibers by directing light transmitted through any one or more of the optical fibers back onto the set of optical fibers. A reflecting element is utilized to reflect transmitted light toward the set of optical fibers and a focusing element is utilized to focus reflected light onto the set of optical fibers. In a transmissive mode, the coupler is adapted for use with two sets of optical fibers by directing light transmitted through any one or more of the optical fibers onto the other set of optical fibers. A shaping element is utilized for shaping light transmitted toward the other set of optical fibers and a focusing element is utilized for focusing transmitted light onto the other set of optical fibers.
Abstract: An apparatus for simultaneously terminating a plurality of insulated conductors in the insulation piercing contacts of a multiple contact electrical connector is disclosed. The apparatus includes means for mounting a connector in conductor receiving position, means for aligning the conductors adjacent individual contacts of the connector, means for positioning the insertion tool adjacent the contacts, the insertion tool being movable in a non-arcuate path substantially perpendicular to the planes defined by the contacts of the connector. The apparatus will accommodate connectors of different transverse dimensions without the necessity of any adjustment and includes uniquely configured conductor aligning means which enhance and facilitate the terminating operations.
Abstract: A method and apparatus for addressing memory locations in a random access memory system having m address lines and 2 Exp(m+n) address locations. The random access memory system is divided into a plurality of 2 Exp(n) memory modules, each memory module having 2 Exp(m) memory locations. Each of the memory modules is divided into 2 Exp(n) groups of 2 Exp(m-n) memory locations. In a specific embodiment in which m=15 and n=4, each memory module contains 2 Exp(15) or 32,768 address locations, and the sixteen memory modules together contain 524,288 address locations. Each memory module is divided into 2 Exp(4) or sixteen groups of memory locations. The first or most significant 4 bits of a 15 bit address word are used to address one of the sixteen groups of memory locations and also to address a particular memory module containing the addressed group.
Abstract: A method and apparatus for high-speed searching of a byte stream for predetermined words or terms. More particularly, the present invention is directed to a method and apparatus for use in combination with a data source supplying a stream of binary signals defining both the identities of alphanumeric characters occurring in an ordered sequence and the position of each such character within a character group for detecting the occurrence of a particularly ordered group of R characters. The apparatus preferably includes a search memory means comprised of multiple (N) sets of R storage locations each of which includes S bit stages, each bit stage being capable of storing a "1" or "0" state. R represents the number of characters within a character group and S represents the number of different characters that can be identified. Each of the R storage locations may store one or more "0" bits, the position of each "0" bit identifying a particular character.
Abstract: An electrical penetration apparatus is described for mounting within a containment wall of a nuclear reactor installation to pass electrical currents while avoiding the outward leakage of radioactive gasses, which can be constructed at relatively low cost. The apparatus includes a pair of cup-shaped casings that face away from one another and have slightly separated base walls, a group of rod-shaped conductors extending through aligned holes in the base walls of the casings and through the separation space between them, and a quantity of potting material disposed in each of the casings and sealed to the conductors and to the inside surfaces of the casings.
Abstract: A coaxial connector for a coaxial cable of the type having an inner conductor encircled by an annular insulating layer, an outer conductor, and an insulating jacket has a metal body with a rear opening for receiving the cable. A rear clamp nut threadingly engageable with the rear opening moves axially within the opening upon rotation to provide an axial force. A clamping ring and a stationary ring securely hold the outer conductor therebetween upon application of the axial force to the clamping ring. A cylindrical rigid member which has compressive material covering its inner surface, outer surface and one end surface and which is coaxial with the cable is disposed between the rear clamp nut and the clamp ring. As a result, when the rear clamp nut is rotated relative to the body, the cylindrical end surface cuts through the compressible material which is compressed by the axial force provided by the rear clamp nut to provide a seal between the rear opening and the cable.
Abstract: Control of skew, bow and yield in circularly knit pile fabric is accomplished by providing the fabric tube as knit and before longitudinal slitting with identification mark means so aligned with respect to selected longitudinally spaced courses that after the fabric tube has been slit and spread out flat for tentering, skew, bow and yield can be readily controlled in response to detecting means for viewing the identification mark means.
Abstract: An improved modular interface connector and connector assembly incorporating such connectors for interconnecting telephones and telephone signal equipment, and particularly for electrically connecting multi-conductor cables to a plurality of conductors electrically coupled to telephone signal equipment. The modular connector assemblies of the invention include improved mounting structures which permit each connector to be slidably mounted on a removable support member within an enclosure. The connectors can be mounted on the support member in at least two alternate orientations and retained in any one of a plurality of positions between spaced shoulders of the support member.
Abstract: A system for synchronizing a clock signal generated by a lower stability clock generator to a received incoming signal whereby a higher stability clock generator is synchronized to the lower stability clock generator when the clock signal is synchronized to the incoming signal, and the lower stability clock generator is synchronized to the higher stability clock generator when the incoming signal is lost. More specifically, in a spread spectrum receiver for receiving a signal phase modulated by a pseudo-random code, a means for synchronizing a receiver pseudo-random code generator to the incoming code modulation is provided. The code generator is clocked by a relatively low stability voltage controlled crystal oscillator (VCXO) whose output frequency is controlled by an error signal created by a phase difference between the received code modulation and the output of the pseudo-random code generator.
Abstract: A channelized receiver system for use in conjunction with a scanning antenna wherein a received rf signal is provided to a plurality of filters each of which has a passband corresponding to a portion of a search bandwidth. The filter output signals are processed to provide a signal related to the frequency of the received rf signal for tuning a narrow band, superheterodyne/receiver to the frequency of the received rf signal. More particularly, the received rf signal is divided so that a first portion is applied to a first group of filters, and a second portion applied to a second group of filters. The filters in each group have passbands defining non-contiguous portions of the search bandwidth. The invention also provides a voting logic circuit in which outputs from each of the filters in each filter group are processed to determine which filter in each group has the highest output signal. Circuitry is provided for comparing these output signals to predetermined amplitude and width criteria.
Abstract: A square root processing apparatus wherein an unknown number is sequentially squared and compared to a number whose square root is to be determined. The result of each comparison determines the state of a bit in the square root being determined. More specifically, the square root processor includes a Y register containing a number whose square root is to be determined, and an X register which is used to develop the square root of the contents of the Y register. The apparatus provides a means for initially setting the most significant bit stage of the X register to one, the remaining bit stages containing zeros. The contents of the X register are then squared by a high speed digital multiplier and compared with the contents of the Y register. If the squared number is greater than the contents of the Y register, the most significant bit stage of the X register is reset to zero. The apparatus then sets the next most significant bit stage of the X register to one and repeats the above-described sequence.
Abstract: The invention is a connector assembly consisting of an elastomeric insert member held within a rigid shell by a retaining ring which engages both the shell and the insert. The assembly includes a passageway between the insert member and the shell permitting access to the retaining ring to allow ready disengagement of the ring and insert from the shell. The retaining ring is composed of two half sections which close about the insert member. The ring includes first retention means for engaging and maintaining the insert member in fixed position within the ring. The first retention means may consist of protuberances extending radially inward from the retaining ring to engage the insert member or it may comprise keying means configured to prevent both axial and rotational movement of the insert member relative to the retaining ring. The retaining ring also includes radially movable second retention means for engaging the shell to maintain the ring and insert member in fixed axial position within the shell.