Abstract: A shielded electrical computer cable connector that has high strength and resistance to crushing forces includes a shield base and a shield cover formed from die cast zinc which together form a shielded chamber. A shielded cable is received in one end of the shielded chamber and a connector module having electrical terminals is secured to the other end of the shielded chamber. The shield base has several conductor alignment columns which retain cable wiring within the chamber in alignment with the terminals in the connector module, and which also support the shield cover.

Abstract: A thermal vellum medium includes a wood pulp based substrate having a thermal layer, comprising a heat-sensitive, image-forming material disposed on one side thereof and a silicone layer impregnated into an opposite side of the substrate.

Abstract: A voltage regulator for regulation of automotive electrical generators and battery system. A generator is coupled through a rectifier to a voltage regulator and a battery. The regulator is activated by a low voltage level stator signal from the generator. The activation voltage level is set to an improved initial activation time when the generator starts to charge the battery while maintaining tolerance to rectifier leakage current. A feedback is included in the regulator to lower power dissipation during regulation and protect the regulator during a voltage surge.

Abstract: In a vertical sawtooth generator of a D.C. coupled vertical deflection circuit, a vertical deflection amplifier generates a sawtooth signal. Magnitudes of the sawtooth signal in first and second instants of its trace period are determined in accordance with first and second D.C. signals, respectively. The first and second D.C. signals are adjusted during service to control the raster height and the raster centering such that while the raster height is adjusted, raster centering is not significantly affected, and vice versa.

Abstract: The present invention is directed to a telephone unit having a redial capability wherein if the number called is busy and a redialing is desirable, a determination is made as to whether a dialing operation has taken place since the telephone was placed in an "off" hook status. If no dialing operation has taken place, then the telephone will dial the desired redial number which is the last dialed telephone number. If the determination is that a dialing operation has taken place since the phone was placed in an "off" hook status, then an operation is initiated upon initiating the redial order command where the telephone is electronically placed in an "on" hook status in order to release the telephone line of the telephone network, and then is reestablished in an "off" hook status for capturing a line of the telephone network. Upon capturing a line of the telephone network, the redial system redials the desired telephone number.

Abstract: An improved color picture tube includes a shadow mask which has a rectangular periphery with two long sides and two short sides. The mask has a major axis, which passes through the center of the mask and parallels the long sides, and a minor axis, which passes through the center of the mask and parallels the short sides. The mask includes slit-shaped apertures aligned in columns that essentially parallel the minor axis. Adjacent apertures in each column are separated by tie bars in the mask. The widths of the tie bars are graded in dimension. The grading is at least partially related to the amount of tie bar stretch occurring in a similar size mask having different tie bar widths.

Abstract: A modem for use in a simulcast paging system includes a modulator (26) and a demodulator (30), both of which produce very low jitter, enabling the modem to be used at data rates well in excess of 1,200 baud. Both the modulator and the demodulator are implemented in software using a digital signal processor (DSP) (66). The modulator initially samples a non-return-to-zero (NRZ) input at a sample rate of 19.2 KHz, interpolates transitions between logic levels, and produces a frequency shift keyed (FSK) modulated signal at a center frequency different than that used for transmitting the modulated signal. Using an interpolation timer that responds to changes in logic level on the input, the modulator changes the frequency of the FSK modulated signal at the appropriate time with much greater accuracy than would be possible without interpolation. The FSK modulated signal is filtered to substantially attenuate frequencies outside a 3 KHz bandwidth, producing a filtered signal.

Abstract: A socket for carrying an integrated circuit (IC) chip. The socket includes a plurality of opposed contacts which have upper and lower integral beams. The socket also includes a spring-biased movable top with inclined inner side walls to urge the contacts into a latched position with the upper beam contacting a lead or a pod on the IC to establish electrical contact. As the top is pushed down, the resilient nature of the contacts allows the lower beam to ride up the inclined side wall into an unlatched position wherein the IC may be removed from the socket.

Abstract: Baseband chrominace components are time division multiplexed and subjected to vertical and horizontal recursive filtering thereby providing color component noise reduction in which vertical streaking characteristic of the vertical recursive filtering is effectively visually cancelled by horizontal streaking characteristic of the horizontal recursive filter thereby providing the benefits of (1) noise reduced baseband chrominance components (2) with minimal visual artifacts, (3) without requiring duplication of filtering elements whereby (4) reliability is increased and with a minimimum of filtering elements and (5) costs are proportionately reducted.

Abstract: An automatic blood pressure measuring device includes a flexible inflation system which quickly and accurately inflates neonatal, pediatric and adult cuffs without significant pressure overshoot. The device uses an electric pump having two intake orifices. A restricted orifice provides air to the pump for all cuff sizes. An unrestricted orifice, which may be opened or closed by actuating a valve, provides air to the pump only when an adult or pediatric cuff is being used. In addition, the pump is controlled by a motor controller which provides dynamic breaking to stop the pump quickly when the threshold pressure has been reached. An overpressure mechanism, separate from the pressure sensor that controls the pump, removes operational power from the pump when a predetermined cuff pressure level, greater than the threshold pressure, has been reached.

Abstract: This invention discloses a tray for transporting Plastic Leaded Chip Carriers (PLCC's) which provides for secure alignment of a PLCC into an individual cavity of the tray and also holds the PLCC within the cavity so that the PLCC will not become misaligned. The invention accomplishes this without any contact with the leads of the PLCC thereby eliminating lead damage and minimizing the degradation of lead coplanarity. Furthermore, no modification of the PLCC is required.

Abstract: A terminator method and apparatus used with a SCSI bus line for removing noise spikes or transients from data and/or control signals received on the bus line include a voltage regulator, a low voltage regulating circuit, a plurality of pull-up termination resistors, and a suppression network. The voltage regulator is responsive to an input termination power supply voltage for generating a regulated output voltage of a predetermined value. The low voltage regulating circuit is responsive to the regulated output voltage for generating a reference voltage. The plurality of pull-up resistors is interconnected between the regulated output voltage and a plurality of data and/or control signal lines coupled to the bus line for generating termination impedances.

Abstract: A railroad coupler mount includes a hook (20) for contacting the inside upper lip (28) of a coupler head (10) within a single coring hole (12a), a jaw member (22) which engages the rib (18) between a pair of coring holes (12a and 14a), a pad (24) for abutting against an outside surface (26) of the coupler head (10), and a handle (30) for orienting the hook (20) in the transverse or upright positions. In a preferred configuration, end-of-train signalling and monitoring equipment (42) is connected to a railroad coupler mount (44) and the handle (64) which tightens the hook (58) against the inside lip of the coupler head also serves the function of locking a battery compartment door (54) closed.

Abstract: A fastener includes a base plate for permitting the portable equipment to be supported from the apparel of a user. An apparel clip is mounted pivotally to the base plate for moving between open and closed position for securing removably the apparel of the user to the portable equipment. In one form of the invention, the apparel clip is biased by a spring to a closed position in order to permit the portable equipment to be attached to the waistband of the user. In another form of the invention, the apparel clip is locked to the portable equipment so the wearing apparel captured by the apparel clip is incapable of being released from the clip except by the direct action of the user.

Abstract: In a television receiver the voltage applied to the loudspeaker from the audio amplifier is low pass filtered and coupled to a threshold detector. Normal audio is attenuated so that the detector is not tripped, but steady DC is passed through the filter and trips the detector. The output of the detector is coupled to the X-ray protection circuit of the receiver which acts to shut the receiver "off".

Abstract: Two transistors are operated individually as emitter follower buffer amplifiers for R-Y and B-Y input signals and are operated together as an inverting summing matrix for deriving a G-Y output signal from the R-Y and B-Y input signals. All three output signals are "buffered" (i.e., provided by low impedance sources) and are subject to substantially equal delays. Advantageously, the circuit implementation requires only two transistors and three resistors to provide output signals which are (1) buffered, (2) matrixed and (3) delay compensated and which features improved reliability (due to reduced "parts count") and an economic implementation of the buffering, delay compensation and matrixing functions.

Abstract: An improved search and rescue transponder having an improved housing assembly that permits the device to be turned on or off by rotating one segment of the housing relative to the other for ease of use even with heavy or bulky gloves. In addition, the housing assembly exterior surface includes a plurality of longitudinal ridges for ease in gripping. The housing assembly includes an upper housing and lower housing joined by a retaining ring and O-ring seal, eliminating the need for fasteners for manufacturing efficiency. The lower housing includes quick disconnect that attaches to a mounting disk affixed to a ship or life raft. The mounting disk includes a plurality of resilient fingers which act in conjunction with cam surfaces on the flange of the lower housing, which when rotated together allow for a quick disconnect.

Abstract: A magnetic variable resistor has an elongated band of electrically resistive magnetic material, with the side edges tapered to a sharp point so that the skin effect causes current to migrate to the edges to create greater resistance. A layer of insulating material can cover the band as it is coiled. Leads are secured to opposite ends of the band. An alternate form of the invention embeds the coiled band in a magnetic insulating material. Surface mount leads are flush with at least one surface of the insulating material.

Abstract: An improved connector assembly of the type having a receptacle for receiving a connector body in locking relation therewith, the receptacle having one or more flexible locking tab members which cooperate with corresponding steps or detent members formed on one or more sides of the connector body for positive locking of the connector in the receptacle, and a sliding release member which is carried on the connector body and is manually slidable toward the connector to move one or more tab release members so they engage and deflect the flexible locking tabs to release positions.