Abstract: In the wave soldering of terminals of an electrical device, such as a miniaturized printed circuit board assembly, the board is moved along a predetermined path so that it initially engages a first solder wave flowing counter to the direction of the board movement and subsequently engages a second solder wave flowing in the direction of board movement. The velocity of the solder in each of the solder waves is controlled independently by having separate independent pumping systems. Thus, the solder waves can be set at different independent velocities to achieve proper soldering of the terminals and associated conductor paths while reducing crossovers or bridges (i.e., shorts) between the terminals and the conductor paths as a result of the close spacing thereof.

Abstract: A switchable attenuator includes a split housing assembly formed of interlocking cover and support members. A plurality of rocker arms are mounted for pivotable movement between the cover and the support members and each rocker arm has lugs formed on opposite ends thereof which receive respective ones of a pair of shorting bars. Electrical circuit connectors, coupled to an attenuator circuit mounted adjacent to the support member, are aligned in pairs with each pair being positioned to receive a respective one of the pair of shorting bars associated with each rocker arm. The rocker arms are selectively pivoted to cause the shorting bars to move into and out of engagement with the electrical circuit connectors aligned therewith to selectively provide attenuation of different magnitudes to an external circuit.

Abstract: A terminal strip assembly of an electrical conductor terminating system includes a first insulating terminal support block having an essentially M-shaped configuration, with a transverse bight portion, rows of electrical conductor guide portions projecting in a first direction from the same side of the bight portion, and resilient side legs projecting in a reverse direction from locations adjacent an opposite side of the bight portion. A row of U-shaped terminals is mounted on the first support block and each terminal includes bifurcated legs which extend within respective adjacent ones of the guide portions to receive electrical conductors inserted between the guide portions. A connector plug assembly for use with the terminal strip assembly includes a second insulating terminal support block having a row of essentially J-shaped electrical conductor terminals mounted thereon.

Abstract: A terminal strip assembly of an electrical conductor terminating system includes an insulating terminal support block having a transverse bight or body portion and rows of electrical conductor guide portions projecting outward with respect to one side of the bight portion in spaced parallel opposed relationship. A row of U-shaped terminals is mounted on the support block and each terminal includes bifurcated legs which extend within respective adjacent ones of the guide portions to receive electrical conductors inserted between the guide portions. The terminals are retained on the support block by a releasably mounted retaining member. Wires may be connected to the legs of the terminals in the terminal strip assembly individually or in pairs utilizing bulk cable.

Abstract: Each lead frame in a continuous strip of lead frames is formed with opposed pairs of integral and subsequently removable aligning tabs for locating a substrate on the lead frame such that leads of the lead frame and respective terminals on the substrate are in alignment. The aligning tabs initially are formed in the plane of the lead frame and subsequently are bent out of the plane of the lead frame so as to project from the lead frame for the reception of the substrate therebetween. The substrate is placed between the projecting tabs in an inverted position with the terminals on the substrate resting on inner free end portions of the lead frame leads. The lead frame then supports the substrate for movement through a series of processing stations, including a lead-terminal bonding station and a tab-removal station, as the continuous strip of lead frames is indexed in successive steps from a continuous lead frame supply.

Abstract: In a system for processing strips of taped axial lead components of different types and values extending from separate supplies, wherein the leads of the components are joined together by elongated tapes, the strips of the components are advanced linearly through a bank of fluid-operated processing heads of essentially planar configuration arranged in closely spaced side-by-side relationship. As each strip of components is advanced through its respective processing head, each component is automatically centered within the head, regardless of the length of the component's body, and its leads are severed to equal lengths from their respective tapes. As the leads of each component are severed, the component is discharged directly onto a conveyor which carries the component to a test station and then to a station in which the leads of the component are retaped for subsequent use in a component inserting machine.

Abstract: This invention relates to a method of growing a single quartz crystal stone. In particular, a method for hydrothermally growing a quartz stone from a quartz seed is disclosed. A substantially stress-free quartz stone is grown in an autoclave by clamping a quartz crystal seed plate in a clip so as to permit substantially unobstructed growth of the stone in the plane of the seed plate, and growing at least a portion of the stone through at least one aperture formed in the clip.

Abstract: A band-pass filter comprising a plurality of coupled electromechanical filters is disclosed. Each electromechanical filter has a frequency pass-band centered about a fundamental frequency and a plurality of higher frequency pass-bands which are centered about overtones of the fundamental frequency. At least one of the electromechanical filters has a fundamental frequency that is different from the other filters and all the filters have a common overtone frequency. The band-pass filter will pass all frequencies falling within the band about the common overtone frequency, while all other frequencies will be suppressed.

Abstract: A wire wrap bit has a rotatable drive member with an axial bore to receive a terminal to be wrapped, and a ridge extending longitudinally along the outer periphery thereof. A hollow rotatable outer member having a longitudinal opening therein to receive the ridge is positioned circumferentially of the drive member. A wire is inserted in a channel formed by the ridge and an edge of the longitudinal opening and is releasably clamped therebetween upon rotation of the drive member. Continued rotation of the drive member causes the wire to be withdrawn from the channel and tightly wrapped on the terminal due to the tension on the wire resulting from the rotational clamping action.

Abstract: A waveguide hybrid coupler having a pair of intersecting, rectangular, waveguides formed in a planar block of material. The coupling region at the intersection of such waveguides has two pairs of opposed corners wherein at least one pair of opposed corners projects into the coupling region.Additionally, a commutating hybrid is formed by connecting two such crossguide hybrid couplers with a pair of rectangular waveguide sections of unequal length. The commutating hybrids are then further connected in cascade to form a channel branching network which will combine and/or separate a plurality of frequency channels presented to the network.

Abstract: This disclosure is directed to a method for enhancing the bondability of a metallized thin film substrate having a conductive material electroplated thereon. Prior to such electroplating of conductive material, the metallized substrate is treated with a liquid photosensitive material which is then entirely exposed to ultraviolet light and developed away to effectuate said enhanced bondability of the resulting conductively coated, metallized substrate.

Abstract: A system for use in a telephone exchange to measure the duration of a telephone call includes an electrical power source from which pulses of constant frequency are applied to first and second pulse generating circuits for generating pulses at selected frequencies representative of a call initial time rate and a call overtime rate, respectively. Each of the pulse generating circuits can be programmed independently to generate pulses at different selected frequencies representative of different call time rates. The pulses from the generating circuits are applied to a plurality of pulse counting circuits through respective pulse count control circuits. At the beginning of a telephone call, one of the pulse counting circuits is seized by associated circuitry of the telephone exchange and the respective count control circuit first passes initial time rate pulses to the counting circuit while blocking overtime rate pulses.

Abstract: Methods of producing consistently uniform and high strength solid-phase (preferably thermocompression) bonds between two mating members and, in particular, between multiple micro-size lead-frame-fabricated electrical ribbon leads and thin film terminals formed on glass or ceramic circuit substrates, for example, through the utilization of at least one, but preferably two or more, interposed and specially contoured compliant contacts per lead.

Abstract: A wound resistor-capacitor network having stable frequency response over a wide frequency range (e.g., 60 cycles to 100 kilohertz), is produced by forming a pair of aligned circumferentially extending resistance paths in one of two strips of metallized dielectric film. Forming of the resistance paths is accomplished as the two metallized strips are being wound to form an R-C network roll, by removing metal from the one strip along a first line to produce a gap in the metal layer in parallel spaced relationship to an adjacent edge of the film. Subsequently, removal of metal from the first strip also is initiated along a second line spaced inward from the first line, to produce another gap in the metal layer, thereby forming an elongated first path of desired resistance between the two lines. Metal removal along the first line then is temporarily interrupted to provide a lead termination area and a current steering path at the adjacent end of the network roll, on either side of the strip midpoint.

Abstract: A protective hood for a cable connector plug is made of a one-piece molded plastic construction. At its forward end the hood includes a resilient tab which snaps into locked relationship with the plug as the hood is slidably assembled to the plug, and at its opposite end the hood can be securely connected to the cable, regardless of the cable diameter, by a self-locking cable tie. The cable is secured to the hood by flexing a pair of integral spaced guide elements projecting laterally from an upper rearward extension of the hood, to position an integral pressure pad beneath the cable jacket, whereafter the cable tie is inserted through an eyelet molded in a top portion of the hood extension. Utilizing the hood portion defining the eyelet as a stop for a head of the cable tie, the tie then is tightened between the guide elements to cause the pressure pad to grip the cable jacket against the upper rearward extension of the hood.