Abstract: A damper for controlling fluid flow may include a main body, a stator that includes a plurality of stator blades, and a rotor moveably connected to the stator and including a plurality of rotor blades. The damper may also include a rotation mechanism mounted to the main body to move the rotor between an opened position and a closed position. The shape of each of the plurality of stator blades and rotor blades may combine to form a shape such that the velocity of the fluid is increased thereby reducing or eliminating back pressure when the rotor is in the opened position.

Abstract: A damper for controlling fluid flow includes a main body, a stator and a rotor. The stator may be carried by the main body and include at least one blade having a predetermined shape. The rotor may be moveably connected to the stator and carried by the main body. The rotor may include at least one blade having a predetermined shape and may be moveable between an opened position and a closed position. The predetermined shape of the at least one stator blade and the at least one rotor blade may form a converging-diverging nozzle, and the stator and the rotor may be carried by the main body so that fluid flows through the main body substantially perpendicular thereto. The opened position may be defined as the at least one stator blade being aligned with the at least one rotor blade, and the closed position may be defined as the at least one stator blade being offset from the at least one rotor blade.

Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.

Abstract: A damper for controlling fluid flow includes a main body, a stator and a rotor. The stator may be carried by the main body and include at least one blade having a predetermined shape. The rotor may be moveably connected to the stator and carried by the main body. The rotor may include at least one blade having a predetermined shape and may be moveable between an opened position and a closed position. The predetermined shape of the at least one stator blade and the at least one rotor blade may form a converging-diverging nozzle, and the stator and the rotor may be carried by the main body so that fluid flows through the main body substantially perpendicular thereto. The opened position may be defined as the at least one stator blade being aligned with the at least one rotor blade, and the closed position may be defined as the at least one stator blade being offset from the at least one rotor blade.

Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.

Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.

Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.

Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A conductive H-shaped impedance matching element matches a source impedance to an antenna impedance. The impedance matching element having a feed terminal at the center thereof from which current is supplied to the two filars of each filar pair disposed about an edge of the impedance matching element and symmetric with respect to a center of the impedance matching element. The impedance matching element further comprises a reactive element for matching the antenna and source impedances.

Abstract: An antenna providing circular polarization for received and transmitted signals. The antenna comprises a vertical conductive surfaces oriented to form a closed structure and horizontal conductive surfaces forming a top face of the closed structure. Connection of selected vertical panels to a feed and ground, causes current flow in the vertical and horizontal surfaces that results in a circular polarized signal.

Abstract: An antenna providing circular polarization for received and transmitted signals. The antenna comprises a vertical conductive surfaces oriented to form a closed structure and horizontal conductive surfaces forming a top face of the closed structure.

Abstract: An electrical overstress protection apparatus and method includes the provision of an overstress element (22) comprised of a lamination including a conducting ground path (26) and a dielectric sheet (30) engaging discrete signal paths (16) connected to contacts (44), the sheet (30) containing holes (32) or pores or thread or fiber interstices filled with an electrical overstress protection material (36) with the sheet thickness and hole area in conjunction with area of signal and ground paths and characteristics of the material adapted to provide breakdown and clamping voltages via a path to ground from signal contacts to ground to protect components from excessive voltage levels. Electrical connectors (40,40', 40") incorporate the apparatus in different embodiments of housing (42,42') and contact (44) configurations.

Abstract: An electrical connector (2) comprising rows of terminals (6) therein has capacitance filter elements (36,38) bonded to side walls (14,16) thereof. The filter elements are comprised of a thin dielectric film laminated on either side with conductive material, the one side serving as a ground electrode and the other side divided into a plurality of signal electrodes separated by gaps formed by conventional etching process. The filter elements also have connection tabs (48,49) extending from a lower end (50) thereof, each tab connected to a separate electrode (42,44) and electrically connected to corresponding terminals (6) of the connector (2). The invention therefore provides for a readily manufacturable and cost effective filtered connector for filtering unwanted frequency components of a signal to be carried, the filter being mountable to the connector housing in an unobtrusive and compact manner.

Abstract: The filtered tap connector 10 includes a body member 12, having a pair of contact members 40 secured therein; a pusher member 50 receivable into a large recess 18 of the body member 12, the pusher member 50 having wire engaging surfaces 52 adapted to engage portions of wires 92 and urge them into electrical engagement with contact members 40; a pair of electrical components 60 of the type having a pair of spaced exterior electrodes 62, 64 disposed within cavities 26 of the body member 12 such that one of the component electrodes 62 is engaged with the corresponding contact member 40; and a biasing member 70 securable to the body member 12 remote from the large recess 18 and including a pair of arm portions 82 for engaging respective ones of the second 64 of the pair of electrodes 60, the biasing member 70 including a conductive path extending from component engaging surfaces 84 to an exposed outer surface portion and means for maintaining the biasing member 70 in the closed position.

Abstract: An electrical connector assembly 10, and method of assembling, comprising a front electrical connector 12 and a rear electrical connector 23 secured together at a separable interface, the front electrical connector 12 including securing means 19 and guiding means 68 and a rear electrical connector 23 including receiving means 56 and aligning means 74. The securing means is engaged by the receiving means to assemble the electrical connector assembly 10 by drawing the front electrical connector 12 relatively toward the rear electrical connector 23, and the guiding means 68 being engaged by the aligning means 74 to maintain the front electrical connector 12 in a precise spatial relationship with respect to the rear electrical connector 23 during assembly and disassembly.

Abstract: A device (24) for protecting against electrical over stress (EOS) of electrical components includes first contacts (50, 56) that interconnect to signal contacts (18) of a connector (12) and second contacts (68) that connect to the ground circuit (20) of a connector with a rigid plastic housing (26) holding the device contacts so that ends (55, 65) have a precise spacing gap (71), the gap being filled with a material matrix (72) of insulating and conductive materials having characteristics in conjunction with the gap to define transit voltage suppression by grounding the signal contacts of a connector. The device is made bendable to fit onto connectors and conform to the connector geometry.

Abstract: The present invention discloses a filtered cable harness connector assembly 10 including a multiterminal connector 12 having at least one row of terminals 18 therein terminated to conductors 28 of a cable 26, at least one filter subassembly 30 secured to the conductors 28 rearward of the multiterminal connector 12 and means covering the connector 12 and subassembly 30. The cable conductors are arranged in at least one planar array 29 and extend rearwardly from the connector 12 in a given lateral spacing. One filter subassembly 30 is associated with each at least one array of conductors. The subassembly 30 has plurality of contact members 32, a purality of filter members 58, means 50 housing the contact members 32 and filter members 58, and bus means 46.

Abstract: Modular electrical connector assemblies and filtered connector inserts therefor. The assembly includes one or more filtered connector inserts releasably mounted within an outer conductive shell. A plurality of filtered contact assemblies are releasably retained within the insert. Each filtered contact assembly includes an electrical contact, a filter electrically coupled to the contact, and a first grounding means electrically coupled to said filter. The filtered contact assemblies are releasably and electrically coupled to the insert when the assemblies are releasably mounted to the insert, and to the outer shell when the insert is mounted within the shell. With the invention, a grounding path is automatically provided from the filter associated with each filtered contact assembly to the outer shell to dissipate filtered interference, while allowing individual removal and replacement of each filtered contact assembly from the insert, and removal and replacement of each insert from the shell.

Abstract: An electrical connector is provided which has both transient suppression and filtering means for protecting electronic equipment from energy generated by RFI, EMI, EMP and ESD. The connector is comprised of a conductive housing member having an axially extending passageway therethrough, and a circuit assembly disposed therein, the circuit assembly including a transient suppression subassembly and a pi-network filter assembly in electrical engagement with a plurality of electrical terminals. The transient suppression subassembly is comprised of a dielectric substrate having conductive path disposed thereon, a plurality of apertures extending therethrough for receiving electrical terminal members and preferably a bidirectional diode electrically connected to the terminal members and conductive path means and grounding means. The filter assembly, comprised of capacitor and inductor members is electrically engageable with the terminal members and ground.

Abstract: A transient suppression assembly for protecting individual circuits on printed circuit boards and for retrofitting existing electrical connectors is disclosed. The assembly is comprised of a dielectric substrate means having terminal engaging means disposed thereon, a grounding means and transient suppression means such as diodes electrically connecting said terminal engaging means and said ground means for suppressing voltages outside a specified level as they are conducted through terminals of the connector and said terminal engaging means.

Abstract: Modular electrical connector assemblies and filtered connector inserts therefor. The assembly includes one or more connector inserts removably mounted within an outer shell. The filtered insert comprises a housing means, at least a portion of which is electrically conductive; at least one electrical contact within the housing means; and filter means within the housing electrically coupled to the contact for filtering interference, and electrically coupled to the conductive housing portion for providing a grounding path from the filter means to the conductive housing portion. Means are also provided for electrically coupling the conductive housing portion of the insert to the outer shell automatically when the insert is positioned in and mounted to the shell to provide an external grounding path from the conductive housing portion to the shell.