Abstract: A fine pitch test clip is provided, which assures accurate alignment of the test lead contacts with the IC (integrated circuit) device leads. The test clip includes a center for lying over the IC body and four arms (e.g. 41 in FIG. 4 ) pivotally mounted on the center, with each arm including a row of contacts (52) mounted in the arm housing. Lower portions of the contacts, which engage the IC device leads (30), are separated by barriers of the housing with endmost barriers (106, 108) being positioned so they can engage the endmost leads (30E) of the IC device to assure alignment of the lower contact portions with the IC device leads. A rigid board (204, FIG. 11) with connectors (211-214) thereon is mounted on the center of the test clip frame, above the arms, and flexible resilient circuit boards (231-234) each extend in a horizontal loop between the top of the contacts that lie at the top of an arm, to the rigid board where they are coupled to terminals of one of the connectors on the rigid board.

Abstract: An electrical connector is provided, whose housing is securely connected to the shields of shielded cables while conductors of the cables are connected to contacts of the connector, in a low cost arrangement. A ring (52, FIG. 3) is installed under the braided shield of the cable to provide a bulged shield portion 54 which is pressed against a conductive cable-supporting surface (76, FIG. 4) of the housing. The ring is preferably of elastomeric material, and a simple tie (100, FIG. 6) can surround the cables and a housing retainer (66) to securely hold them together, the tie lying in slots (81-83) of the retainer.

Abstract: A heat stake press apparatus is described for fixing a connecter to a circuit board by heat staking pegs of the connector, which facilitates alignment of the circuit board holes with forming tips in a low cost press. A pair of aligners (110, 112, FIG. 6 ) is provided that are each mounted at a forward edge of the board in alignment with a peg hole (22) of the board. The board is mounted on support guides (62, 64) of the press, and the board is slid forwardly until a pair of forming tips (52) are received in slots (124) of the aligners to sidewardly align the board. The support guides are then moved sidewardly so board guide pins (74A, 76A, FIG. 2 ) move against side edges (80, 82) of the board. Thereafter, the aligners are removed, a connector (14) is placed on the board with its pegs projecting down through the board holes, and the board is again placed in the press on the support guides.

Abstract: A connector is described which uses a prior art standard housing but which uses a modified socket contact to enable reception of a long pin contact. The standard housing (7, FIG. 8) has a horizontal passage (28) with a rear end portion that has four ribs (9). The socket contact (4, FIG. 5) is a substantially cylindrical tube having a plurality of projections (13) on its outside that can pass between the housing ribs, with the socket contact then turned so the projections lie forward of the ribs to lock the socket contact in place. The projections permit the inside of the tube to be of substantially constant diameter to receive a long pin contact.

Abstract: A sampling device for a batch or continuous pulp digester for reduction of pulp sampling errors such as during a digester "blow" and for improving a pulping process based on the obtained samples.

Abstract: A helmet mounted night vision device for a pilot that is automatically propelled away from the pilot before the pilot ejects from an aircraft, thereby preventing injury to the pilot caused by the night vision device striking the ejecting pilot. In a preferred embodiment, the present invention night vision device is a binocular device, having a right optical assembly and a left optical assembly that are viewed by the right and left eyes of the pilot, respectively. The right and left optical assemblies are each attached to elongated arm members. Each of the arm members, supporting the optical assemblies, are pivotably coupled to a common mounting plate that is removably attachable to the helmet of the pilot. Prior to ejection, the left and right optical assemblies are joined in front of the eyes of the pilot, thereby forming the binocular device.

Abstract: A connector is described, of the type that has a plastic housing with pegs (15, FIG. 2 ) that project through round holes (16) in a circuit board to hold the connector in place, wherein the pegs are shaped to minimize warping of the circuit board and facilitate construction of the pegs. Each peg has an axis (27) and has at least three vertical interference ridges (17-20) each spaced from the axis by slightly more than the radius of the circuit board holes, with the outer surface (28) of each ridge having about the same radius of curvature as that of the board holes. The outer surface of each peg preferably extends by an angle A of at least 15.degree. about an imaginary circle (32) centered on the axis, with the ridges connected by straight sides (21-24), with the straight sides lying on an imaginary regular polygon such as a square (29). Each peg can have a cylindrical lower portion (30, FIG. 4 ) extending below the ridges and closely received in the hole to assure alignment of the ridges with the hole.

Abstract: A cable harness assembly is provided, which has a low profile, is shielded, and can be constructed at low cost. The assembly is of the type that includes a board (12, FIG. 2) coupled to a connector frame (14) that holds multiple contacts (52) and coupled to a cable (16), wherein insulated wires (24) of the cable run along the board and have bared front ends (50) connected at joints (74) to tails at the rear of the contacts. An underlayer (72) of electrically insulative material lies over the wire-to-tail joints and any other exposed areas of the wires and tails lying on the board, the underlayer having undulations (78, FIG. 3) that follow the contours under it. An overlayer (80, FIG. 2) of electrically conductive plastic material lies over the underlayer and the rest of the board, wires, and cable front portion.

Abstract: An equalizer circuit for equalizing RF frequencies implemented as an MMIC or MIC having a series of microstrip transmission lines between an RF input terminal and an RF output terminal and having at least one shunt path comprised of a series combination of a FET able to be switched between a conducting state and a nonconducting state and a stud tuner microstrip transmission line, wherein the FET is used as a voltage variable resistor to selectively de-Q the stub tuner and thereby control the depth of the equalization curve. In a modified embodiment, artificial transmission lines which include a plurality of inductive elements and FETs are coupled to each shunt path, wherein the shunt paths may be selectively shorted by changing the state of the FETs, thereby permitting the center frequency of the equalizer circuit to be shifted as well.

Abstract: A coaxial connector is described, of the type that has a shell (14, FIG. 1 ) with a tubular first portion (16) whose front mates with another connector and whose extreme rear end (64) is initially open, and which has a second portion (22) extending at a right angle to the first portion for mechanically and electrically terminating to the braiding (42A) of a coaxial cable (30). The second portion (22) of the shell forms a tubular ferrule that surrounds the cable inner insulation (40) and which is surrounded by the cable braiding. The connector includes a sleeve (46) which can slide along the cable to a position surrounding the braiding that surrounds the ferrule, so crimping of the sleeve locks the braiding between the ferrule and sleeve. The shell second portion includes first and second parts (50, 52) that extend respectively from the lower and upper sides (60, 62) of the rearward end (56) of the first shell portion, with the second part being bendable and each part forming about half of the tubular ferrule.

Abstract: A pressure sensor is electronically corrected for inherent and temperature induced errors. The sensor is characterized with a four term, third order equation. The sensor behavior coefficients for the four terms are themselves each characterized with a three term, second order equation that tracks how the four coefficients change with respect to temperature. The temperature effect coefficients for the three terms in each of the four equations, twelve coefficients in all, are stored in memory. In operation, a microprocessor measures the temperature, retrieves the 12 temperature effect coefficients, solves the four second order equations to obtain the four sensor behavior coefficients, solves the third order equation using the four sensor behavior coefficients and the sensor output to yield the true pressure. In this way, the full spectrum error map of the pressure sensor can be remembered with just 12 coefficients using only 72 bytes of onboard memory.

Abstract: A quick connector for fast connection of fluid carrying assemblies such as a mating tube and a fluid unit. The connector includes a connector body which houses the connector components and accepts a redundant clip which is adapted to engage an upset bead of the male tube. The redundant clip is generally L-shaped and includes a retaining head which is inserted into the connector body and is adapted to engage the upset bead, a body portion which extends along the side of the connector body and in the preferred embodiment is contoured to mate with the connector body and a base member which includes a camming edge for facilitating the insertion of the retainer head into the connector body.

Abstract: A thin film, intagliated phosphor screen structure includes an optical fiber bundle in which each of the fibers has its glass core etched below the level of its cladding sheath at the internal surface of the screen, and a phosphor layer is deposited as a thin film which fills in the core recesses. Preferably, the upper surfaces of the phosphor layers are formed with a spherical or parabolic shape, which is obtained by surface tension when the phosphor film is annealed. The upper surfaces of the phosphor layers may also be finished by polishing. An aluminum reflective layer may also be coated on the phosphor layer. The bottom walls of the cores are preferably etched to be convex or concave to provide a lens effect. The intagliated phosphor screen can transmit 90% to 95% or more of the light generated in the phosphor layers, for an output gain factor of 5 or more over conventional phosphor screens.

Abstract: An apparatus and corresponding method for converting static data, obtained for a simulated theoretical logic circuit, into a dynamic visual display. The present invention selectively reads static simulated data produced for a theoretical logic circuit, divides the data into smaller time intervals, synchronizes the time intervals and recursively converts the data contained in each time interval into a graphical waveform image. The waveform images are recursively updated in real-time, thereby creating a dynamic visual display for the waveform.

Abstract: A grounding spring is provided for discharging static electricity on a card as the card is inserted into an electronic device and for thereafter grounding the card, which minimizes electromagnetic radiation during electrostatic discharge in a simple and easily mounted construction. The grounding spring (60, FIG. 3) is formed of sheet metal and has a card-engaging part 64 lying within a recess of a card-guiding track (72). The grounding spring has a downwardly extending leg (90) that extends down into a hole (92) of a circuit board lying under the card-receiving mechanism, and has a substantially 180.degree. loop (112) connecting the card-engaging part to the downward leg.

Abstract: A low pressure accumulator assembly for use with a fluid pump comprises a pump housing with a longitudinally extending chamber having a base with a fluid flow opening. An accumulator is secured in the pump housing chamber. The accumulator includes an accumulator housing with a longitudinally extending bore. A piston is biased outwardly of the bore to selectively engage the base of the pump housing chamber. A protrusion extends outwardly from the piston to limit an area of engagement between the piston and the base so that fluid flowing from said opening into the chamber may engage a greater area of the piston.

Abstract: A quick connect connector for fast connection of fluid carrying assemblies such as a mating tube and a fluid unit. The connector includes a connector body which houses the connector components and accepts a redundant clip which is adapted to engage an upset bead of the male tube. The redundant clip is generally L-shaped and include a retaining head which is inserted into the connector body and is adapted to engage the upset bead, a body portion which extends along the side of the connector body and in the preferred embodiment is contoured to mate with the connector body and a base member which includes a camming edge and pivot points for facilitating the insertion of the retainer head into the connector body.

Abstract: A negative electron affinity device has acceptor dopant concentration increased proximate the emitter face of the III-V semiconductor layer and within the depletion zone effected by an overlying CsO negative electron affinity coating. Methods to accomplish dopant concentration include diffusion, ion implantation and doping during crystal growth.

Abstract: An electrical connector assembly includes two connectors (22, 24), wherein the first connector has a pair of contacts (46A, 46B, FIG. 9 ) which rapidly break engagement as the connectors slowly approach each other. An actuator (60), has a ridge deflector (72) for moving back a contact end portion (52A), the actuator being urged rearwardly (R) by a first spring (100). However, a pair of rearwardly bowed trigger springs (82) press against surfaces (96) to resist rearward (R) actuator movement. As the connectors progressively approach each other, the first spring (100) is progressively compressed, causing increasing deflection of the middles of the trigger springs (82), until resistance offered by the trigger springs suddenly decreases. The actuator then moves rapidly rearward, so its deflector (72) moves back the contact end portion (52A) to rapidly open the switch. The actuator is rapidly moved back by the now-compressed first spring (100).