Abstract: A connector assembly includes a connector body having at least one terminal, an electrical conductor connected to and extending away from the terminal, and a one-piece, molded grommet/seal member. The grommet/seal member is injection-molded around a portion of the connector body, the point at which the electrical conductor and terminal are connected, and at least a portion of the electrical conductor. A portion of the grommet/seal member is formed so as to sealingly attach to an opening in a housing. The grommet/seal member is formed of a flexible material, such as neoprene, so as to allow the connector body to be laterally displaced for purposes of alignment with a mating connector assembly.

Abstract: In a frequency modulation system, a modulating signal is split into its low-frequency and high-frequency components. The low frequency component is used to modulate a carrier signal by conventional means in a first circuit and the low- and high-frequency components are used to narrowband modulate the carrier signal in a second circuit. The outputs of the first and second circuits are combined to provide a frequency modulated signal. The modulating and carrier signals can be binary-coded signals.

Abstract: A receptacle connector is described, which has an EMI (electromagnetic interference) shield of low cost construction with many rearwardly-extending tines for engaging a fully mated plug connector and a pair of forwardly extending fingers for grounding the plug connector before contact mating occurs, in a low cost construction. The shield (60) is formed of a piece of sheet metal having an approximately 180.degree. bend (62) resulting in outer and inner legs (66, 64). The outer leg is mounted in a groove (70) on the inside of the connector shell (22), while the inner leg forms multiple tines (50) and a pair of early grounding fingers (80). A region of the inner leg has a pair of vertical slots (84, 86) forming a finger with a rear end (90) supported on adjacent portions of the inner leg and with a free finger outer end (82) that engages a plug connector when it is first inserted into the receptacle connector.

Abstract: A steam and fuel oil supply and purge valve has a steam valve and actuator member which provides for a closed position, a purge operation with communication established between a steam supply line and a discharge line leading to an oil burner, a burner operation position wherein the actuator portion of the member engages and opens an oil supply valve member and thus establishes communication between an oil supply line and an oil discharge line to the burner. Oil recirculation is also provided together with a "cooling" steam feature. The latter is provided by the steam valve and actuator at an additional position where a metered flow of "cooling" steam is provided for inoperative burner tips when other burners remain in operation.

Abstract: A two-phase clock generator generates a nonoverlapping two-phase clock from a unipolar input clock by utilizing gate delays in first and second signal paths. The output of each signal path is fed over a cross-coupled feedback path back to a logic gate in the respective other signal path. Each logic gate is a floating inverter having a first supply terminal connected to a supply voltage, and having a second supply terminal that is the feed point for the respective feedback signal from the output of the other signal path.

Abstract: An offset-voltage-balancing operation amplifier for difference signals includes an auxiliary and a main amplifier, each having a difference input and an auto-zero input. To provide offset balancing, the auto-zero inputs are connected to the potentials of two integrated storage capacitors. The difference input of the auxiliary amplifier can be short-circuited via first and second switching means, and the two storage capacitors are connected to the output of the auxiliary amplifier via third and fourth switching means. The sensitivity of the auto-zero inputs is less than the sensitivity of the difference inputs.

Abstract: A transconductance amplifier is driven by a difference voltage which is coupled through a first input terminal to a first voltage-to-current converter and through a second input terminal to a second voltage-to-current converter of identical design. An identical third voltage-to-current converter has its input terminal connected to the tap of a resistive voltage divider which is connected between the first and second input terminals. The output signal of the transconductance amplifier can be taken from the current outputs of the first and second voltage-to-current converters. The current outputs have a difference current which is proportional to the value of the difference voltage.

Abstract: An electrical connector system is provided, of the type that includes housings of plastic-metal hybrid construction, which provides good moisture-tight sealing between the plastic shells and metal inserts and around grounding springs. The receptacle connector has a front edge to which the plastic shell and metal insert extend, and the plug connector includes a ring-shaped elastomeric first seal (90, FIG. 3) that is compressed by the front edge of the receptacle shell and insert (96, 98), to not only seal the inside of the mating regions of the connector but also to seal any slight gap (100) between the plastic shell and metal insert of the receptacle. The forward edge of the plug presses against a second elastomeric seal (92) which is on the receptacle, with the first and second seals sealing a region containing a grounding spring (80) that electrically connects the inserts of the plug and receptacle.

Abstract: A connector of the plug and socket type comprises a housing (3) having a chamber (4) into which extend, one or more conductive pins (5). A second housing (8) is adapted to be received in the chamber (4). When the housing (8) is fully inserted in the chamber (4) the pins (5) pass through a first aperture (24) and a second aperture (25). Between these apertures, the pins are deformed by a projection (18) and retained thereby. The projection (18) forms part of a contact element (15) which is provided with tines (17) engaging the conductors of an inserted cable (12).

Abstract: An electrical shielding arrangement is provided wherein an edge connector (5) interconnects first and second circuit boards (1, 16). One of the boards (1) on which the edge connector lies includes a metal ground plane (2) and a plated through hole (3) which extends through the board and which makes effective contact with the metal ground plane. The plated through hole receives a metal fixing pin (4) of compliant metal which extends from the connector body (30) and is press fit into the hole (3). The forward end of the pin is positioned to engage a conductive layer (20s) at the leading edge of the second board, which is connected to the ground plane (19) of the second board. Thus, the pin (3) interconnects the ground planes (2, 19) of the two boards.

Abstract: An electrical connector comprises a body accommodating one group of staggered rows of spring contacts for engagement with cone-shaped contacts arranged in correspondingly staggered rows on a printed circuit board. The spring contacts of one row have intermediate flattened parts which slidingly engage with peaks of the corresponding dome-shaped contacts thereby requiring low insertion force while curved parts of spring contacts of the other row are riding up the convex profile of the corresponding dome-shaped contacts requiring high insertion force. Two similar groups of staggered rows of spring contacts may be provided for accommodating boards having staggered rows of raised contacts on both sides of the board.

Abstract: A position encoder for a sliding door power drive system, such as those employed on van type vehicles, enables a positive drive powered operation of the door by a control switch remote from the door while accommodating manual operation of the door without mechanical interference or resistance from the drive or altering of the drive control program. A push/pull cable connected to the door is in positive meshed engagement at all times with a rotary drive gear whose rotative displacement from a rest position is continuously read by the position encoder and transmitted to a control unit as a door position input signal. During powered operation of the door, the control unit controls a bidirectional drive motor which is coupled to the drive gear via a normally disengaged clutch to drive the door to selected positions along its path of movement.

Abstract: An electrical connecting arrangement is provided between an electrical edge connector and a printed circuit board in which contact pads provided near the edge of the printed circuit board have a convex profile at least in the direction of insertion of the board into an opening in the edge connector. At full board insertion, each spring contact (3, FIG. 1A) of the connector engages a board contact pad (5) at a location (64) on the pad that lies beyond the center (66) of the pad.

Abstract: A connecting assembly is described for connecting two printed circuit boards (12, 13) comprising a plug (10) and socket (11). The plug has a dielectric peripheral frame (14), at least one plug block (16) in the frame, and contact elements (e.g. 18) in the plug block. The plug frame (14) extends forwardly beyond the front face (27) of the plug block (16) in order to form a receptacle (48R). The socket (11) comprises a peripheral frame (15), at least one socket block (17) mounted in the socket frame, and contact elements (e.g. 19) in the socket block. The socket block (17) extends forwardly (arrow Fs) beyond the front edge (51) of the socket frame (15) and can be received in the plug receptacle (48R).

Abstract: An electrical coupling is provided which has a dielectric body with numerous contact-holding holes, which provides electromagnetic shielding between contacts in a simple and low cost construction. The body (20, FIG. 3) has through holes extending between its opposite faces, and has a metal plating (34) which covers the walls of the holes as well as at least a portion of a face to interconnect all of the hole platings. A plurality of dielectric bushings (54, 56) lie in many of the holes to prevent contacts (36) in the holes from touching the plating on the walls of the holes. At least one of the holes not occupied by one of the bushings, holds a metal grounding device (60) securely connected to the plating on the hole wall and forming a contact for connecting to a grounded terminal (16G).

Abstract: A connector is provided, of the type that includes a largely insulative insert device (14) that fits closely into a metal shell (24), and wherein the metal shell fits into a diecast housing (32) that can be tightly clamped in place, wherein the insert device and shell are separately held to the housing. The housing has a vertical hole (34) for receiving the insert, and has horizontally-opening slots (46, 48) at opposite ends of the hole. The shell has a casing portion with a vertical hole (26) that closely receives the insert, and has a pair of largely horizontal flange portions (42, 44) that fit into the slots in the housing, until the holes in the housing and shell are aligned so the insert device can be received in both of them. The flange portions are bent in a largely wave-like manner, to provide good electrical connection with the walls of the slots in the housing.

Abstract: A connector is provided of the type that has rows of contacts, which minimizes cross talk between adjacent contacts. An interceptor plate (60, FIG. 2) which is grounded or at another controlled potential, extends along each row of contacts (34), the plate lying close to the row to provide better capacitive coupling between each contact and the plate than between contacts of the same or different rows.

Abstract: A plug and socker connector for a printed circuit board has the socket part open at the bottom so that it can be attached to the board by latches engaging in openings in the board, leaving conductive tracks on the board exposed within the socket part. A plug has external resilient contacts so that when the plug is inserted in the socket, the contacts press against the conductive tracks of the board. Other fastening means for holding the socket against the board are disclosed, and the socket can be double so that a plug can be inserted on either side of the board.