Abstract: A solid imaging apparatus is provided that includes a replaceable cartridge containing a source of build material and an extendable and retractable flexible transport film for transporting the build material layer-by-layer from the cartridge to the surface of a build in an image plane. An operator using the device needs merely to remove a spent cartridge and replace it with a fresh cartridge to continue solid imaging virtually uninterrupted. The apparatus also includes the capability of withdrawing and inserting an imager without the operator having to perform a separate alignment step. A brush attached to the transport film and forming part of the cartridge provides for intra-layer removal of excess uncured build material. If desired, the apparatus can produce a fully reacted build. A high intensity UV source cures the build between layers. An injection molded build pad is designed to hold a build in an inverted position for improving the build.

Abstract: A method and an apparatus for casting concrete products substantially with a horizontal slipforming process, the concrete mass in said method being fed by means of at least one feed element (2) through a limited cross section (13, 7, 8) for forming a concrete product, whereby the feed elements (2, 5, 15, 16) produce a two-directional compacting motion for compacting the concrete mass.

Abstract: A reusable apparatus and method for forming a composite part through vacuum assisted resin transfer molding (VARTM). The reusable apparatus may be configured to vacuum seal a curable material, such as composite material, against a tool and disperse a permeating substance such as liquid resin through the curable material. The reusable apparatus may comprise a sheet of material such as rubber having a plurality of surface deviations facing the curable material and the tool. The surface deviations may provide paths for evenly distributed air flow as air is evacuated from between the sheet of material and the tool. Additionally, the surface deviations may allow the permeating substance to be evenly dispersed throughout the curable material. A vacuum outlet of the tool may be positioned between two sealing apparatuses to provide continuous vacuum suction proximate a perimeter of the sheet of material to prevent air from leaking in.

Abstract: An apparatus for forming shaped bodies from a thermoplastic film has a stationary support, a downwardly directed upper tool fixed on the support, means for feeding the film in a transport direction in steps underneath the upper tool, a lower shaft pivotal in support below the traverse, a frame carried on the shaft and pivotal therewith about an axis of the shaft, an upwardly directed lower tool shiftable on the frame toward and away from the axis, a pair of arms extending radially from the shaft, a link extending between one of the arms and the lower tool, and a crank drive element. A connecting rod extends between the other of the arms and the crank drive element. A stationary cam adjacent the frame has a nonstraight cam formation, and a cam follower on the tool engages the cam formation. A drive rotates the crank drive element.

Abstract: An apparatus and method for releasing a lens moulded in a cavity between posterior (21) and anterior mould (22) sections and adhered thereto. A post (30) is configured to support a flange (20) of the posterior section whilst the anterior section remains spaced from the post. Posterior section is compressed between a pin (40) applied to, an outer concave surface (29a) of the posterior section and the post, thereby initially releasing peripheral regions of the posterior section and subsequently the remaining portions thereof. Upon separation, the anterior section together with the lens (10) drops onto the post so that its outer convex surface (29a) rests on the post. A collar unit (50) with gas channels (53) presses against a flange (200) of the anterior section whilst blowing jets of gas towards an interface between a “monomer” ring (11) formed around the lens. In this manner, initially the “monomer” ring and then peripheral regions of the lens are separated from the anterior section.

Abstract: A mould housing for apparatuses for expanding plastic containers has at least two mould parts which can be assembled together and which in an assembled state have an interior space for accommodating the plastic container that is to be expanded. The housing has at least one insulating element which can be placed against an outer wall of at least one mould part. The insulating element has a curved profile, wherein the curvature of the insulating element is matched to a curvature of the outer wall.

Abstract: An apparatus comprises a blow-moulding mould arrangement arranged for expanding a preform to obtain a container, said blow-moulding mould arrangement comprising a die arrangement cooperating with a punch arrangement, the apparatus further comprising a compression-moulding mould arrangement comprising a further die arrangement cooperating with said punch arrangement for compression-moulding plastics to obtain said preform.

Abstract: A bottom plug retract mechanism for use in a blow mold having a top die and a bottom die defining at least a portion of a mold cavity, the mechanism including a plug that is operable to move away from the mold cavity at an angle to the parting plane when the mold cavity is opened.

Abstract: A stream of hot oxygen is formed by providing a duct and a fuel lance movable axially within the duct, flowing gaseous fuel out of the lance into the duct, mixing it in the duct with gaseous oxidant, flowing the mixture out of the duct into an atmosphere which is hot enough that it ignites the mixture without aid of an ignition source other than said atmosphere, and combusting said mixture in a flame that does not extend into said duct; then moving the lance so its fuel outlet approaches the duct exit orifice so that the base of said flame moves inside said duct to the fuel outlet; and then moving the lance to draw the fuel outlet and the flame attached thereto away from the exit orifice into the duct; and increasing the flow rate of gaseous oxidant in said duct, so that combustion of fuel within the duct heats uncombusted oxygen which emerges as a stream of hot oxidant.

Abstract: To enable a significant flow of liquid, gas or mixed hydrocarbons to be eliminated cleanly and safely, particularly during a well test phase, a burner comprises two concentric apertures, rotationally symmetrical about a common axis, enabling a hollow flame to be generated. The central aperture (20), intended for liquid or mixed products supplied by a conduit (12), consists of 2 concentric male (22) and female (21) conical parts, with the spacing (25) therebetween being continuously adjusted by the axial movement of the rod (23) which carries the male component (22) and which is centered by a centring component (24) in the conduit pipe (12), which carries the female component (21). The peripheral aperture (60), intended for gas products or an auxiliary airflow, also consists of two concentric male (62) and female (61) conical parts, between which the spacing (65) is not necessarily continuously variable during burning.

Abstract: A radiant tube heater with a burner assembly, a radiant tube assembly and a combustion air pre-heater; wherein the burner assembly comprises: a burner fuel nozzle; a plenum chamber and a pre-mixer chamber; the plenum chamber having a combustion air inlet; wherein in use: combustion air flows from said plenum chamber through an orifice to said pre-mixer where said air is mixed with burner fuel entering said pre-mixer through said nozzle prior to being combusted at a burner head; said pre-mixer being at least partly located within said radiant tube assembly; and where in use at least part of the combustion air supplied to said plenum is preheated in said air pre-heater using residual sensible heat of the hot combustion gas products of the heater.

Abstract: An operating and control package for at least one pressurized burner. The operating and control package comprises a controller and a gas control device. The controller is an integrated packaged unit for supplying and controlling a pre-mixed air/gas pressurized burner. A housing is provided for containing the controller. The housing is preferably located at the end of the burner manifold. The gas control device comprises a gas control valve for receiving gas entering the control package and a premix blower located within the housing for receiving gas from the gas control valve and air entering the control package. The gas control device mixes the air and gas to form a pressurized combustible mixture which is fed into the burner.

Abstract: A heat treatment jig for semiconductor silicon substrates is configured such that a cristobalitized oxide film is formed in a region where the cristobalitized oxide film is in contact with a silicon substrate backside. When said heat treatment jig is used, generation of a slip can be prevented during heat treatment. In the case where the heat treatment jig is used in combination with a shielding plate, particles are further prevented from adhering to the silicon substrate surface to maintain quality characteristics of the semiconductor silicon substrate at a higher level, and device production yield can largely be improved. The heat treatment jig can easily be manufactured by introducing a cristobalitization promoting agent to a surface or in the vicinity of a surface of the heat treatment jig, performing the heat treatment at temperatures in the range of 1000 to 1380° C., and repeating the introduction of the cristobalitization promoting agent and the heat treatment.

Abstract: An orthodontic appliance 1 for promoting development of a dental arch form in a patient who has an underdeveloped dental arch form is disclosed. The appliance 1 includes an arch-shaped base member 2 that is made of a resiliently flexible material, and a teeth engaging member 5 that encloses at least part of the base member 2. The teeth engaging member 5 defines upper and/or lower dental arch receiving channels 46, 47 and is made of a resiliently flexible material that is softer than the base member and is deformable. The appliance 1 has a resting form in which the resilient materials of the base member 2 and the teeth engaging member 5 are in their resting condition. The appliance 1 can be flexed or deformed out of the resting form to fit the underdeveloped dental arch form into the dental arch receiving channel 46, 47.

Abstract: A computer is used to create a plan for repositioning an orthodontic patient's teeth. The computer receives an initial digital data set representing the patient's teeth at their initial positions and a final digital data set representing the teeth at their final positions. The computer then uses the data sets to generate treatment paths along which the teeth will move from the initial positions to the final positions.

Abstract: A surgical drill guide for installing dental implants with predetermined angular alignment and rotational orientation for a dental prosthesis, formed of: a. a base part formed to correspond generally to the shape and contour of a patient's upper or lower mouth, the base part having peripheral edges and having opposite tissue and mouth sides and at least one drill guide hole extending through the base part from the tissue side to the mouth side, each of the drill guide holes having a central axis at a predetermined angular orientation relative to the mouth side and having lateral location relative to the peripheral edges, and b. a set of rotational position indicators on the tissue and mouth sides respectively of the base part for each of the drill guide holes, the rotational position indicators of each set being at the same rotational position about the central axis of the drill guide hole.

Abstract: Stain-removing oral compositions, such as gum compositions are herein provided. The compositions include a chelating agent and a surfactant. The surfactant includes a fatty acid salt and at least one component selected from nonionic and anionic surfactants. The fatty acid salt may have at least one hydroxyl functionality. The oral compositions may optionally include an abrasive agent.

Abstract: A device for removing stains and polishing a user's teeth including a handle portion and a brushing head mounted on said handle, the brushing head comprises a support member; a pad of melamine foam coupled to the support member, and at least one tooth projecting outward from the melamine foam pad; wherein the at least one tooth, when rubbed against a users teeth, removes stains from the user's teeth.

Abstract: The invention relates to a computer readable medium that includes one or more programs for carrying out a method for restoration of a patient's tooth. The method includes the steps of generating an electronic image of a patient's tooth; providing a preliminary treatment plan for addressing the dental needs of the patient; and forwarding the electronic image and preliminary treatment plan to a dental laboratory so that technician can evaluate the image and treatment plan and in a manner such that the technician and dentist can review and discuss the preliminary treatment plan.

Abstract: An endodontic instrument with an elongate shaft and a plurality of inverted frusto-conical sections with radial cutting edge disposed along a working portion of the shaft.

Abstract: The embodiments herein provide a dental and medical biomaterial and its use for sealing and/or filling the tooth and bone cavities. In the embodiments herein, the calcium salt, calcium oxide, calcium silicate, and calcium phosphate compounds are mixed with a water-base solution, and a bioactive phosphate and calcium enriched mixture is prepared. The mixture comprises high concentration of water-soluble calcium and phosphate, and consequently forms hydroxyapatite during and after setting. The dental/medical biomaterial is biocompatible, antibacterial and capable of forming an effective seal against reentrance of microorganisms into the filled cavity. The biomaterial is compatible to handle and set in an aqueous environment and to stimulate soft/hard tissue healing/generation/regeneration.

Abstract: A system (1) for detecting and recording impacts produced by shock waves and/or by non-lethal projectiles on the surface of a target (2), includes: a) a plurality of sensors (3i) applied to the target (2) and capable of detecting the said impacts and generating and transmitting a signal detectable by a transceiver device (4); b) a transceiver device (4), also fixed to the target (2), and capable of receiving the signals generated by the said sensors (3i), detecting which of the sensors has emitted a signal, and sending the corresponding data to a recording apparatus (5); c) a recording apparatus (5) capable of recording and storing the data received from the transceiver device (4).

Abstract: A cuff for a health managing system includes a strand having first and second terminal ends. A plurality of beads, each presenting a numerical or a non-numerical value, are slidably retainable and movable along the strand. The beads are movable between various positions between the first and second terminal ends for tabulating a health management system or preventing movement of the beads between the first and second terminal ends.

Abstract: A training model for use in training to perform a medical procedure which is invasive of a skull, such as the insertion of an external ventricular drain or the evacuation of a subdural hematoma. The training model may comprise a base component defining a training component receptacle and a training component for mounting in the training component receptacle and comprising a skull section. Alternately, the training model may comprise the skull section or the training component in isolation. The skull section comprises an outer skull layer, a middle skull layer and an inner skull layer. The outer skull layer is constructed of an outer skull material which simulates osseous tissue when penetrated. The middle skull layer is constructed of a middle skull material which simulates marrow tissue when penetrated. The inner skull layer is constructed of an inner skull material which simulates osseous tissue when penetrated.

Abstract: An electrical connector assembly includes a socket and a plug. The socket includes a first main body defining a first longitudinal receiving space. A sidewall of the first longitudinal receiving space defines a helical slot. The helical slot includes at least one entrance formed on an end of the first longitudinal receiving space. The plug includes a second main body and at least one fixing assembly mounted in a peripheral sidewall of the second main body. Each of the at least one fixing assembly includes a ball rotatably connected to and extends partially out of the peripheral sidewall of the second main body. The extending part of the at least one ball being is able to slide in the helical slot through the at least one entrance.

Abstract: An adapter includes a device-side component and a wall-side component. The device-side component has a male socket receptacle to receive an electrical plug and a male socket opposite the male socket receptacle. The wall-side component has a female socket plug to insert into an electrical outlet and a female socket opposite the female socket plug. The male socket is configured to interface with the female socket, regardless of orientation of the male socket with respect to the female socket.

Abstract: An electrical connector assembly is configured to be mounted to a circuit board having opposite first and second sides that are interconnected by a board edge. The connector assembly includes first and second connectors disposed along the board edge. The connectors are configured to mate with at least one of mating connectors and a circuit board of an external device to electrically couple the first and second connectors with the external device. Each of the first and second connectors has a center signal contact and a shield shell that extends around the center signal contact. The center signal contact of the first connector engages the first side of the circuit board and the center signal contact of the second connector engages the second side of the circuit board. The first and second connectors mate with the at least one of the mating connectors and the circuit board along parallel mating directions.

Abstract: An exemplary socket assembly includes a circuit plate and a socket mounted on the circuit plate for fixing an IC. The socket includes a first fixing member and a second fixing member. The first fixing member includes installed portions, elastic connecting portions, and a first buckling portion, the elastic connecting portions interconnects the electric portions and the first buckling portion. The second fixing member includes electric portions, elastic connecting portions, and a second buckling portion, and the elastic connecting portions interconnect the electric portions and the second buckling portion.

Abstract: An electrical receptacle is disclosed. The electrical receptacle includes a housing and at least one socket at least partially disposed within the housing and having at least a pair of entry ports. The at least one socket is controllable by a radio frequency signal. The electrical receptacle also includes an antenna at least partially disposed within the housing configured to at least receive the radio frequency signal used to control the at least one socket. The electrical receptacle further includes at least one tamper resistant device at least partially disposed within the housing. The at least one tamper resistant device is configured to block the entry ports unless a mating electrical plug is inserted into the at least one socket.

Abstract: An electrical connector assembly, for electrically connecting an IC package and a printed circuit board (PCB) (1), comprises an insulative housing (2); an insulator (4) separated with the insulative housing, and comprising a bottom surface and a guiding portion (42) extending downwardly from the bottom surface; a shell (3) covering the insulative housing, and one end of the shell assembled on the insulator; a PCB comprising a retaining hole (11) for receiving the guiding portion of the insulator, and the bottom surface of the insulator attached to the PCB.

Abstract: A cable connector may be disclosed. The connector may include a connector housing having a first threaded portion and an insert having compression voids. The insert may be configured for insertion into the connector housing. The connector may also include a compression nut configured to engage the first threaded portion. The compression nut may be configured to compress the insert to close the compression voids when the compression nut engages the first threaded portion. The cable connector may also include an end stop having an adjustable throat diameter configured to adjust in proportion to an adjustable inner diameter of the cable connector as the connector engages or armor of an armored cable.

Abstract: The present invention provides an electrical blanking plug for a telecommunications socket or jack. The blanking plug having at least one electrical conductor positioned on the body of the plug, which conductor on insertion of the plug into a telecommunications jack or socket electrically connects one or more terminals on the jack to short circuit and/or ground one or more electrical telecommunication circuits terminated at the jack.

Abstract: The automatic loading and unloading of devices for burn-in testing is facilitated by loading burn-in boards in a magazine with the stacked boards in the magazine moved into and out of a burn-in oven by means of a trolley. The trolley can include an elevator whereby a plurality of magazines can be stacked in the oven for the simultaneous burn-in testing of devices mounted on the burn-in boards. Each board has rollers on one end which are engagable by pneumatically actuated cam mechanisms for inserting the board into an electrical contact in the oven for burn-in tests. Preferably, the cam mechanisms allow for extraction of a single board for inspection. The cam mechanisms may be mounted on a door of the oven.

Abstract: A lever connector includes a first connector portion including a first terminal housing with a plurality of first connecting terminals, a second connector portion including a second terminal housing with a plurality of second connecting terminals, a plurality of isolating plates, a connecting member to fix the first and second connecting terminals at the contacts therebetween, and a lever structure including a turn lever provided to hold both sides of either one of the first or second terminal housing. The lever structure includes a housing attaching/detaching mechanism for turning the turn lever to pull and mate the first and second terminal housings together, or pull the first and second terminal housings apart to release the mating, and a connecting member manipulating mechanism for turning the turn lever to manipulate the connecting member to apply a pressing force to each of the contacts or release the applying of that pressing force.

Abstract: The power converter of the invention includes a housing, two conductive pins, a flexible arm and a plug. The housing has a recess. The conductive pins protrude from the recess. The flexible arm is formed with a protrudent plate and a positioning block, which protrude from the recess. The protrudent plate is located beside the conductive pins. The plug includes a disk and two leads. The protrudent plate presses either of the conductive pins when the flexible arm is depressed so that the conductive pins move away from the leads to form a disconnection. The conductive pins connect to the leads when the disk is positioned by the positioning block.

Abstract: A lamp socket has a mover and a supporter. At an open position, the supporter supports the mover so that the mover does not prevent a lamp from being moved to or from a mounting position along a specified direction. When the lamp can be moved from the mounting position along the specified direction, the supporter supports the mover so that the contacts do not make contact with lamp pins, respectively. At the close position, the supporter supports the mover so that the mover prevents the lamp from being moved from or to the mounting position along the specified direction. If the mover is at the close position, and the lamp is in a posture by which it can be moved from the mounting position along the specified direction in case of the open position, the supporter supports the mover so that the contacts make contact with the pins, respectively.

Abstract: An electrical connector for connecting a flat conductive member includes a housing made of an electrical insulating material and including a terminal holding groove, and a terminal held in the terminal holding groove for contacting with the flat conductive member. The terminal holding groove includes a first groove portion and a second groove portion. The groove portion has a first groove width, and the second groove portion has a second groove width smaller than the first groove width. The terminal includes an upper arm portion, a lower arm portion extending in parallel with the upper arm portion, and a combining portion combining the upper arm portion and the lower arm portion. The lower arm portion includes a connecting portion accommodated in the first groove portion and to be soldered to a circuit board. The upper arm portion includes a pressing portion for pressing the flat conductive member.

Abstract: Provided are a ground connecting device occupying only a little space and a wire harness having the ground connecting device. The ground connecting device comprises first and second ground joint connectors to connect a plurality of first and second grounding wires included in a wire harness to a ground site. The first ground joint connector includes a plurality of first wire terminals to be attached to respective terminal ends of the first grounding wires and a first ground conductor having a first ground-side terminal portion and a first connector housing which holds the first ground conductor. The second ground joint connector includes a plurality of wire terminals to be attached to respective terminal ends of the second remaining grounding wires, and a second ground conductor having a second ground-side terminal portion, and a second connector housing which holds the second ground conductor.

Abstract: A socket comprises an insulative base, a movable frame assembled to the insulative base, and at least one latch device pivotally assembled to the insulative base. The movable frame can move up and down relative to the insulative base. Each latch device includes a latching member pivotally assembled to the movable frame and a pressing pad linked to the latching member. The pressing pad can be able to rotate freely relative to the latching member when the movable frame actuates the latch device to rotate.

Abstract: An electrical connector includes a housing and a terminal. The terminal is disposed in the housing. The terminal includes a pressing portion for receiving a wire and a connecting portion extending from the pressing portion. The pressing portion includes two elastic arm portions and a pressing groove portion between the elastic arm portions. The elastic arm portions includes a base portion extending from a connecting portion, a first arm portion extending from the base portion toward an opening portion of the pressing groove portion, a transition portion in a curved shape at a distal end portion of the first arm portion, and a second arm portion extending toward the base portion in parallel to the first arm portion. The elastic arm portions contact with the wire at inner edge portions of the second arm portions when the wire is inserted into the pressing groove portion.

Abstract: A disposable, non servicable, illuminating electrical adapter (205) that quickly illuminates and attaches to a conventional electrical plug (285) and functions to illuminate both an electrical receptacle 220 and the adapter face itself for the purpose of locating and safely inserting electrical adapter between electrical plug and an electrical receptacle. Additional features include opaque 255 and translucent 260 image applications that enable the adapter 205 to function as a combination promotional/awareness generating product and also a safety promoting, useful tool.

Abstract: An electrical box is mounted on a wall stud, and a wiring panel is installed within the electrical box so as to partition the interior of the electrical box into a user inaccessible wiring compartment and a user accessible module compartment. A protective cover is attached to the wiring panel so as to protect the wiring panel during a makeup phase of wall panel installation and painting. After the makeup phase, the protective cover is removed from the wiring panel and a module having a user operable electrical function is mounted to the wiring panel within the user accessible module compartment.

Abstract: Disclosed is a docking station for an electronic device comprising a main body which holds an electronic device and voids in the main body to allow for the passage of external connectors directly into the docked device and the securing of the external connectors to the main body.

Abstract: A retaining member includes at least a leg portion having a latch portion, a coupling portion and a spring portion. When the spring portion is displaced, the coupling portion is twisted. Then, the latch portion and the coupling portion are inserted into the opening so that an electric component is retained on a main face of the substrate. In this state, a part of the latch portion is disposed at the periphery of the opening on a rear face of the substrate, a part of the coupling portion is disposed in the opening, and the spring portion is disposed on the main face of the substrate. Therefore, the retaining strength of the electric component to the substrate can be improved, and damage of a side wall of the opening can be decreased.

Abstract: A cage for shielding and handling electrical connectors, the cage has a pair of sidewalls each having a first and second longitudinal portions. A transverse link pierce joins the first longitudinal portions to form a single piece. Support members extend from the sidewalls and disposed in the space between the second longitudinal portions. A portion of the electrical connector is seated onto the support members, with the mounting portions of the contact terminals of the connector exposed. The electrical connector can be carried and positioned onto a PCB during the assembling process, by handling the cage only. The electrical connector is movable relative to the cage along vertical direction when contact terminals are brought into contact with the PCB to ensure the coplanary of contact terminals and PCB circuits. The present invention ensures the positioning accuracy of the connector onto the PCB and eases handling and assembling process.

Abstract: An electrical connector includes an insulative housing having a longitude base with a plurality of contacts retained therein in a first direction, a pair of opposite arms extending from ends of the longitude base in the first direction and a shielding shell includes a top plate and a bottom plate covering on the housing. A receiving space is enclosed with the top plate, the bottom plate of the shielding shell and the pair of arms of the insulative housing. An arm-limited means is unitarily formed on the shell to abut against inside face of the pair of arms.

Abstract: An electrical connector includes a plurality of terminals, a housing and a shield plate. The terminals are arranged and held in the housing. The shield plate is formed by bending a metal plate and attached to the housing. The housing includes a sidewall and an edge wall at an end portion of the sidewall. The shield plate includes a shield portion covering an outer surface of the sidewall and a held. The held portion is supported on a holding portion disposed on the edge wall of the housing. The shield portion includes a regulating portion capable of abutting against the outer surface of the sidewall. The regulating portion regulates deformation of the shield portion when the shield plate is attached to the housing.

Abstract: A fuse adapter adapts coplanar blades of fuse having a predetermined blade spacing to fit a pair of coplanar blade receiving terminal slots in a circuit having a different slot spacing. The fuse adapter includes a pair of adapter terminals. Each adapter terminal has a slotted, planar upper end spaced from the other terminal's slotted upper end by the fuse blade spacing. Each adapter terminal upper end also has an adjusting tab bent away from the upper end substantially perpendicular thereto and substantially parallel to the plane of the coplanar terminal slots. Each adjusting tab is integral with a transition portion that extends to an adapter blade. The two adapter blades are coplanar with and spaced apart to match the fuse blade receiving terminal slots in the circuit.

Abstract: An intermediate electrical connector for connecting two electrical connectors includes a blade assembly formed of a plurality of blades and a ground plate attached to the blades; a plurality of terminals disposed on each of the blades and extending in parallel to each other; and a holding member for holding the blade assembly. The intermediate electrical connector may further include an intermediate portion disposed between the holding members.

Abstract: A housing for a coaxial jack including an opening for receiving the jack, the opening including a guide for preventing rotation of the jack within the opening. The housing also includes a stop to limit sliding of the jack within the opening and a flange extending from an outer surface. An outer face opposite the flange includes a ridge and a groove. A housing for coaxial jacks includes a pair of openings for receiving jacks. Each opening includes a guide to prevent rotation and a stop to limit sliding of the jack within the opening.