Abstract: A plug element (1) for connecting supply lines of an articulated train with at least one line element (3) including a fluid contact (4) located in the housing (2) of said train, that is able to be brought into functional engagement with a second plug element (5). The plug element (1) remains in an operationally safe position without the pre-stressing force of a spring element (11a, 11b). The housing (2) of the plug element (1) can be moved laterally relative to a connection socket (6) that is fixed in space and the cross sectional area (AD1, AD2) for pressurization of the line element (3) is configured such that upon impingement with compressed air a force acts in the direction of insertion (8).

Abstract: A GPU connection apparatus for an aircraft towing vehicle comprising a vehicle-mounted ground power unit (GPU). The GPU includes a GPU cable having a first end which is connected to the GPU and a second end which includes a GPU connector that is configured to be plugged into a GPU receptacle on an aircraft to be towed. The GPU connection apparatus includes an intermediate cable having a first end which comprises a cable plug and a second end which comprises a cable receptacle. The cable plug is configured to be plugged into the GPU receptacle. In addition, the cable receptacle is configured to receive the GPU connector. In use of the GPU connection apparatus, the cable plug is plugged into the GPU receptacle and the GPU connector is plugged into the cable receptacle to thereby electrically connect the aircraft to the GPU.

Abstract: A silicon wafer for a photovoltaic cell is produced by a debinding step of a self-supported film formed of at least one main thin layer comprising at least 50% volume of silicon particles, devoid of silicon oxide and encapsulated in a polymer matrix protecting them against oxidation, followed by a sintering step to form the silicon wafer.

Abstract: A wiring substrate connects an electrical system of a towed vehicle to an electrical system of a towing vehicle and includes a wiring connector configured to connect to a connector from a wiring harness of the towed vehicle, a first set of connections to connect to tail light assemblies in the towed vehicles, a second set of connections to connect to vehicle signal connections in the towed vehicle, the first and second sets of connections electrically coupled on the wiring substrate by at least one diode, and a third set of connections to connect to the towing vehicle.

Abstract: The present invention provides a retractable adapter for connecting a towed vehicle to a towing vehicle. The retractable adapter may include a lower housing, an upper housing and a retractable mechanism to store the wiring harness when not in use with the towed vehicle. The lower housing may be attached to the towing vehicle. The adapter may include a rotating disc assembly, a wire guide assembly and an electrical connector or wiring harness that may be coiled around the wire guide assembly. The adapter may also include a circuit tester with light emitting diodes (LEDs) and a backup alarm. In addition, the adapter may mate a seven-way blade connector to a four-flat connecter harness.

Abstract: A mounting bracket for a trailer wiring connector is described. The mounting bracket may attach the electrical connector to a cross bar of a towing vehicle. The mounting bracket may include an upper housing and a lower housing. The upper housing may include a mounting aperture and a plurality of slots. The lower housing may include a threaded aperture and a plurality of tabs. The tabs may be capable of engagement with the slots to secure the upper housing to the lower housing. The lower housing may also include a clamping fastener, such as a set screw, that may be capable of engagement with a threaded aperture, wherein the set screw may be capable of clamping engagement with the electrical connector. The mounting bracket may also include a cover capable of engagement with the electrical connector.

Abstract: In a method for driving electronic devices connected to a vehicle trailer tow connector a trailer electronic device control signal is receiving from a vehicle data communication network. In response to the received control signal, a solid state power control device is switched to connect electrical power to a selected pin of the trailer tow connector. The trailer electronic device control signal may be received from a wiring harness connector connected to a vehicle data communication network. A vehicle trailer tow connector module includes a module housing. A vehicle wiring connector and a trailer wiring connector are coupled to the module housing. A power control circuit is connected to a selected pin in the trailer wiring connector. A controller circuit is coupled to the vehicle wiring connector for receiving communication data from a vehicle data bus, and coupled by control lines to the power control circuit.

Abstract: A plug element (1) for connecting supply lines of an articulated train with at least one line element (3) comprising a fluid contact (4) formed thereon located in the housing (2) of said train, said fluid contact able to be brought into functional engagement with a second plug element (5). The object of the invention was to provide a plug element (1) that remains in an operationally safe position without the pre-stressing force of a spring element (11a, 11b). The object is met according to the invention by a plug element (1) in which the housing (2) can be moved laterally relative to a connection socket (6) that is fixed in space and the cross sectional area (AD1, AD2) for pressurization of the line element (3) is configured such that upon impingement with compressed air a force acts in the direction of insertion (8).

Abstract: A farm implement towed or pushed by a vehicle includes at least one electrically actuated device mounted for operation and a high capacitance capacitor connected in circuit with the device and with a source of electricity on the vehicle. Electric power is supplied from the vehicle to the implement at a nominal rate to charge the capacitor and/or operate the device. The capacitor is selectively discharged to either supplement the electric power supplied by the vehicle to the device or to completely power the device such that the device is provided with electric power for operation at a peak rate exceeding the nominal rate electric power is supplied from the vehicle to the capacitor and/or the device.

Abstract: A trailer hitch apparatus for mechanically and electrically coupling a towing vehicle to a towed vehicle includes: a receiver and a trailer mount. The receiver has a receiver tube with an open end; a first electrical connector having a plurality of electrical contacts for attaching to the towing vehicle electrical system; and a second electrical connector having a plurality of electrical contacts electrically connected to the plurality of electrical contacts of the first electrical connector.

Abstract: A signal transmission device is used for connection between a first electrical connector at a truck-tractor of a towing vehicle and a second electrical connector at a trailer of the towing vehicle. The signal transmission device includes first and second magnetic holders, third and fourth electrical connectors mounted to the first and second magnetic holders respectively, a stretchable coil tube, and a cable. The first magnetic holder is adapted to be attached to the truck-tractor and the second magnetic holder is adapted to be attached to the trailer. The third electrical connector is adapted for connecting the first electrical connector at the truck-tractor and the fourth electrical connector is adapted for connecting the second electrical connector at the trailer. The cable is spirally inserted through the stretchable coil tube and provided with two ends electrically connected with the third and fourth electrical connectors.

Abstract: An electrical connector including a first connector portion and a second connector portion. First and second covers are pivotally attached to the body about a common axis for covering the first and second connector portion.

Abstract: An electrical connector including a first connector portion and a second connector portion, and interface electronics for providing an interface between terminals associated with the first and second connector portions and a vehicle bus.

Abstract: A personal mobility vehicle includes a first vehicle unit and a second vehicle unit. A connection assembly, for electrically coupling a first electrical plug-in unit fixedly mounted to the first vehicle unit and a second electrical plug-in unit fixedly mounted to the second vehicle unit, includes a guide disposed on the second vehicle unit intermediate the first electrical plug-in unit and the second electrical plug-in unit. The first electrical plug-in unit has a first plurality of electrical wires and has an outer configuration. The second electrical plug-in unit has a second plurality of electrical wires. The guide has an aperture sized to accept the outer configuration of the first electrical plug-in unit.

Abstract: In a method for driving electronic devices connected to a vehicle trailer tow connector a trailer electronic device control signal is receiving from a vehicle data communication network. In response to the received control signal, a solid state power control device is switched to connect electrical power to a selected pin of the trailer tow connector. The trailer electronic device control signal may be received from a wiring harness connector connected to a vehicle data communication network. A vehicle trailer tow connector module includes a module housing. A vehicle wiring connector and a trailer wiring connector are coupled to the module housing. A power control circuit is connected to a selected pin in the trailer wiring connector. A controller circuit is coupled to the vehicle wiring connector for receiving communication data from a vehicle data bus, and coupled by control lines to the power control circuit.

Abstract: An apparatus is provided for simultaneously coupling a towing vehicle energizing circuit to a tow-dolly lighting circuit and a towed-vehicle lighting circuit. The apparatus includes a unitary connector body having a first portion for mating with an output plug of the towing vehicle energizing circuit, a second portion for mating with an input plug of the tow-dolly lighting circuit, and a third portion for mating with an input plug of the towed-vehicle lighting circuit. The connector body includes a plurality of conductors, each of which connects a terminal in the connector body first portion to corresponding terminals in each of the connector body second portion and third portion. The apparatus of the invention can be used to simultaneously connect the towing vehicle energizing circuit to two trailer end 4-flat plugs, one to power-tow-dolly lights and a second to power vehicle-in-tow lights.

Abstract: The invention relates to an electric interface device (11) for transmitting electric power between a vehicle and an implement that can be coupled to said vehicle (42), which is especially an agricultural or industrial utility vehicle. The inventive electric interface device (11) comprises a vehicle interface (14), an implement interface (24), and electric wires (20, 22, 30, 32, 58, 62), by means of which the vehicle interface (14) can be connected to an electric power source (10) of the vehicle (42) and the implement interface (24) can be connected to an electric consumer (12). The vehicle interface (14) is embodied so as to be complementary to the implement interface (24) and can be reversibly connected to the implement interface (24). The invention further relates to a vehicle (42) and an implement encompassing an electric interface device (11).

Abstract: The present invention provides a retractable adapter for connecting a towed vehicle to a towing vehicle. The retractable adapter may include a lower housing, an upper housing and a retractable mechanism to store the wiring harness when not in use with the towed vehicle. The lower housing may be attached to the towing vehicle. The adapter may include a rotating disc assembly, a wire guide assembly and an electrical connector or wiring harness that may be coiled around the wire guide assembly. The adapter may also include a circuit tester with light emitting diodes (LEDs) and a backup alarm. In addition, the adapter may mate a seven-way blade connector to a four-flat connecter harness.

Abstract: Apparatus for illuminating the lights of an abandoned trailer having a pigtail connector which has been disconnected from a complementally formed pigtail connector on a draft vehicle and more particularly to a plug, stored on the trailer and including a plurality of electrically conductive pins aligned with, and formed complementally, to electrically conductive pins on the trailer pigtail connector to detachably couple the trailer battery to the trailer lights. Switch mechanism is provided for selectively coupling and decoupling the plurality of electrically conductive pins on the trailer pigtail connector to each other so that the trailer mounted battery can be selectively coupled in circuit to the lights when the trailer is unhitched. An electrically non-conductive yieldable housing stows the plug and the trailer pigtail connector in mating engagement on the trailer.

Abstract: A female connector member for a towing connector includes a buzzer mounted in an accommodation chamber of a connector body and electrically connected to the reverse light terminal and grounding terminal to give an audio warning signal when the towing vehicle is moving backwards. A light emitting diode (LED) circuit board is mounted in the accommodation chamber and is electrically coupled to the buzzer for controlling LEDs to flash when the buzzer buzzes.

Abstract: An apparatus provides for coupling a trailer lighting circuit including a light emitting diode to towing vehicle lighting circuit. The apparatus includes a connector having a first contact for coupling to a trailer lighting circuit input and a second contact for coupling to an electrical ground. The connector includes a resistive component coupled between the first contact and the second contact. The connector is configured to couple the first terminal to an output of the towing vehicle lighting circuit. The resistive component can include a resistor, an incandescent light or another component having suitable electrical resistance. The connector can be in various forms, including a trailer harness plug, a towing vehicle harness plug, or an adapter for coupling a towing vehicle electrical harness plug to a trailer electrical harness plug.

Abstract: An electrical connector including a first connector portion and a second connector portion. First and second covers are pivotally attached to the body about a common axis for covering the first and second connector portion.

Abstract: An electric coupler for a camping trailer includes a first connector, and a second connector mounted on the first connector. The first connector has a mounting groove, and the second connector has a mounting block inserted into the mounting groove of the first connector. Thus, the first connector is connected to a first electric power system, and the second connector is connected to a second electric power system, so that the trailer is connected to the first electric power system and the second electric power system respectively for use with a user. In addition, the mounting block of the second connector is inserted into the mounting groove of the first connector to combine the second connector and the first connector together so that the electric coupler is assembled easily and quickly.

Abstract: A signal transmission device is used for connection between a first electrical connector at a truck-tractor of a towing vehicle and a second electrical connector at a trailer of the towing vehicle. The signal transmission device includes first and second magnetic holders, third and fourth electrical connectors mounted to the first and second magnetic holders respectively, a stretchable coil tube, and a cable. The first magnetic holder is adapted to be attached to the truck-tractor and the second magnetic holder is adapted to be attached to the trailer. The third electrical connector is adapted for connecting the first electrical connector at the truck-tractor and the fourth electrical connector is adapted for connecting the second electrical connector at the trailer. The cable is spirally inserted through the stretchable coil tube and provided with two ends electrically connected with the third and fourth electrical connectors.

Abstract: A parking alarm of a towing connector having a buzzer mounted in the housing thereof and electrically connected with the positive terminal and negative terminal of the buzzer to the terminal for parking light and grounding terminal of the male connector at one end of the housing such that the buzzer is electrically to produce an audio warning signal when the parking light is turned on during a backward movement of the truck and the trailer.

Abstract: An electrical connector including a first connector portion and a second connector portion. First and second covers are pivotally attached to the body about a common axis for covering the first and second connector portion.

Abstract: An improved, low profile, surface mounted female electrical connector for mounting to a vehicle. The connector has a flat rear surface that facilitates mounting on many different vehicles in many different locations. The connector may be mounted with or without drilling holes in the tow vehicle. The connector includes easy-to-use wire connectors with LED indicator lights to verify correct electrical connections between the tow vehicle and the electrical connector.

Abstract: A socket for a towing apparatus for releasably coupling a motor vehicle trailer, includes a housing having a front housing section for receiving a trailer-side plug-in connector and a cable outlet for motor vehicle-side cabling. A first axis of the housing extends in the insertion direction of the plug-in connector, and a second axis extends axially with respect to the cable outlet. The two axes enclose an angle which is less than 180°.

Abstract: A connector assembly for supplying power and transmitting signals from a vehicle to a towed trailer or other towed equipment. The connector assembly comprises a trailer hitch having a cross tube extending horizontally behind the vehicle. The cross tube has a wall separating an inside cavity from an outside surface of the cross tube. A first connector attached to the outside surface or mounted in a first opening in the wall of the cross tube has a connecting portion outwardly of the outside surface. Likewise, a second connector mounted at the outside surface or in a second opening in the wall of the cross tube has a connecting portion outwardly of the outside surface of the trailer hitch. One or more conduits extend across the inside cavity between the first and second connectors for interconnecting the vehicle to the towed trailer for supplying power and transmitting signals between them.

Abstract: A connector assembly for supplying power and transmitting signals from a vehicle to a towed trailer or other towed equipment. The connector assembly comprises a trailer hitch having a cross tube extending horizontally behind the vehicle. The cross tube has a wall separating an inside cavity from an outside surface of the cross tube. A first connector attached to the outside surface or mounted in a first opening in the wall of the cross tube has a connecting portion outwardly of the outside surface. Likewise, a second connector mounted at the outside surface or in a second opening in the wall of the cross tube has a connecting portion outwardly of the outside surface of the trailer hitch. One or more conduits extend across the inside cavity between the first and second connectors for interconnecting the vehicle to the towed trailer for supplying power and transmitting signals between them.

Abstract: A nosebox assembly for making electrical connection between a tractor and a trailer comprises a nosebox housing with an interchangeable connector assembly and a terminal plate assembly, both configured to mountable within the nosebox housing. The interchangeable connector assembly includes a plurality of primary conducting pins extending therefrom and configured as a socket, each of the pins being adapted to receive connection to a circuit. The interchangeable connector assembly is detachably mounted inside the nosebox housing and is easily removable for repair or replacement. The terminal plate assembly includes a plurality of secondary conducting pins extending therefrom. Additionally, the terminal plate assembly includes a plurality of auxiliary pins extending therefrom to provide additional connection points to the circuits received from the primary conducting pins.

Abstract: An improved, low profile, surface mounted female electrical connector for mounting to a vehicle. The connector has a flat rear surface that facilitates mounting on many different vehicles in many different locations. The connector may be mounted with or without drilling holes in the tow vehicle. The connector includes easy-to-use wire connectors with LED indicator lights to verify correct electrical connections between the tow vehicle and the electrical connector.

Abstract: An electrical connector including a first connector portion and a second connector portion. Each of the first and second connector interfaces includes several terminals. At least a portion of the terminals of the first connector interface are electrically coupled to associated ones of the terminals of the second connector interface via a multi-level arrangement.

Abstract: A power adaptor includes an elongated and portable body having a pair of axially opposed end portions. The body includes a pair of diametrically offset L-shaped arms protruding outwardly therefrom. Another of the body end portions and the L-shaped arms define a plurality of respective electrical contacts for receiving a corresponding male receptacle associated with an auxiliary power device. The body further includes a flap directly conjoined to another body end portion and repeatedly pivotal between open and closed positions for sheltering the electrical contact associated with another body end portion during non-operating conditions. The power adaptor further includes a mechanism for regulating power distribution to the electrical contacts such that the power distribution can be automatically disconnected from the body when the tractor trailer power supply source drops below a minimum threshold level set at 12-volts.

Abstract: In accordance with the teachings described herein, systems and methods are provided for supplying power to a vehicle trailer. A connection device may be used to connect the vehicle trailer to a vehicle power line and to a control line from a vehicle electrical system. The trailer may include a main trailer electrical system and an auxiliary trailer electrical system. The main trailer electrical system requires power only when the vehicle trailer is in motion, and may be coupled to the connection device to receive power from the vehicle power line. A control unit may be coupled to the connection device, and may receive a control signal from the control line. The control unit may be used to switchably couple the auxiliary trailer electrical system to the vehicle power line based on the control signal.

Abstract: A retractable wiring harness device attaches to the trailer frame near the trailer hitch and contains a length of retractable wiring harness which extends from a housing member to install within the wiring connection on a towing vehicle, the trailer wiring harness wired into the lighting and braking wiring harness of the trailer. When the trailer is disconnected from the towing vehicle and the retractable wiring harness is disconnected from the wiring connection of the vehicle, the wire cable is withdrawn into the housing member to retain the retractable wiring harness, keeping it off the ground and out of the way of the trailer hitch.

Abstract: An apparatus provides for coupling a trailer lighting circuit including a light emitting diode to towing vehicle lighting circuit. The apparatus includes a connector having a first contact for coupling to a trailer lighting circuit input and a second contact for coupling to an electrical ground. The connector includes a resistive component coupled between the first contact and the second contact. The connector is configured to couple the first terminal to an output of the towing vehicle lighting circuit. The resistive component can include a resistor, an incandescent light or another component having suitable electrical resistance. The connector can be in various forms, including a trailer harness plug, a towing vehicle harness plug, or an adapter for coupling a towing vehicle electrical harness plug to a trailer electrical harness plug.

Abstract: The invention relates to a plug-and-socket connection device for the automatic, e.g. multipolar electrical connection of a vehicle trailer, particularly of a semitrailer, to a towing vehicle, particularly to a prime mover. The plug-and-socket connection device comprises a socket and a plug, which can be mounted on the vehicle trailer (e.g. the plug) or on the towing vehicle (e.g. the socket, they can be aligned with one another when coupling the vehicle trailer to the towing vehicle, and can be displaced while being guided by a drive provided in the form of an, e.g. piston/cylinder assembly relative to one another between an (advanced) connecting position and a (retracted) inoperative position.

Abstract: A wire harness for a truck, truck and trailer, a recreational vehicle or bus includes a rear removable connector positioned adjacent to the rear of the vehicle, a first cable attached to the bottom of the vehicle having one end attached to the rear removable connector and the other end attached to the vehicle's electrical load. The vehicle's electrical load is enabled when the rear removable connector is connected to an external power source, which is generally known as shore power.

Abstract: A cable for conducting electric current from a source receptacle to a load receptacle. The cable includes a primary cord including an electrical conductor with a first terminal end and a second terminal end, and a ground cord including an electrical conductor for establishing an electrical connection between a circuit including the cable and ground. A first plug is adapted to conduct the electric current between a contact provided to the source receptacle and the first terminal end, and a second plug is adapted to conduct the electric current between the second terminal end and a contact provided to the load receptacle. At least one of the first plug and the second plug is compatible with a single-prong receptacle.

Abstract: Methods and apparatus are provided for connecting wires from a primary vehicle to a towing vehicle through an improved wire harness connector. There is described an assembly of a vehicle bumper with a connector attached to the bumper. The bumper has a set of holes, snap-fit holes, and locking holes, that allow the connector to attach. The connector includes a set of snap-fits and at least one depressable lock. The snap-fits are configured so as to insert through snap-fit holes thereby restricting movement of the connector. The lock is also configured to pass through the locking hole thereby restricting movement of the connector.

Abstract: A lid (20) and a cover main body (10) are formed with sliding contacts (17, 23) that slide in sliding contact with each other immediately before the lid (20) reaches a lid-closing position for damping biasing forces given from coil springs (30) to the lid (20). Frictional resistance is created by the sliding contact of the sliding contacts (17, 23) and the biasing forces given from the torsion coil springs (30) to the lid (20) are damped by this frictional resistance. In this way, an impact given when the lid (20) reaches the cover main body (10) at the lid-closing position is alleviated.

Abstract: A female connector member for towing connector is disclosed to have a light emitting diode indicator light set installed in the locating frame thereof, keeping the light emitting diode indicator lights respectively electrically connected to the left direction light, right directional light, license light (tail light), stop light, battery charger, and back light of the towing truck and protruded over the front side of the locating frame for easy checking of the functioning of the respective signal lights and the battery charger of the towing truck.

Abstract: A socket body (20) including a plug socket terminal accommodation chamber (23) and a ground terminal accommodation chamber (24) below the plug socket terminal accommodation chamber (23). The ground terminal accommodation chamber (24) has an aperture (30) formed along a direction substantially orthogonal to an insertion direction of a mating plug and a vertical direction and the ground terminal (31) is accommodated through the aperture (30). A downwardly open draining hole (29) is formed on a periphery of the plug socket terminal accommodation chamber (23). A rib (36) is formed on a peripheral surface so that a distance between the rib (36) and the aperture (30) is shorter than a distance between the rib (36) and the draining hole (29).

Abstract: The trailer electrical connector enclosure may be used for retaining and protecting an electrical connector on towing vehicles. An enclosure may have a first enclosure element and a second enclosure element attached by a fastener. The first enclosure element and the second enclosure element may have a main wall, two side wall elements and a back wall element. The main wall element may have a connector portion, an outwardly expanding portion and a rectangular portion having an open end. A cover may be pivotally attached to a side wall of the enclosure biased by a spring for closure of the open end portions. A clamp pedestal may be attached to an interior surface of the main wall and a back wall may have an aperture.

Abstract: A plug-in connection device for the self-actuating electrical connection of a motor vehicle trailer to a towing motor vehicle with a socket (D) and a plug (S), which can be disposed on the motor vehicle trailer (for example the plug S) or the towing motor vehicle (for example socket D) During the coupling of the motor vehicle trailer to the towing motor vehicle, socket (D) and plug (S) can be aligned with respect to one another and can be moved by means of a drive (10), developed for example as a piston-cylinder configuration, relative to one another between an advanced connection position and a retracted resting position. Preferably a cover (5) of the socket (D) can be opened by displacing the contact insert (1), bearing contact sleeves (11, 12), in the direction of the connection position with the aid of drive (10). When the contact insert (1) is retracted into the resting position, the cover can be closed again.

Abstract: A connection body (41), of a connector for a towing vehicle, to be connected to a wire harness of a to-be-towed object and a connection body (42) of the connector to be connected to a wire harness of a towing vehicle body are approximately cylindrical. Terminals (32, 33) inside the connection bodies (41, 42) are composed of a common metal piece (31). The connector is connected to a wire harness (35) of the towing vehicle body not by using an exclusive cylindrical connector but by directly connecting a core wire to the terminal (32). To prevent water from penetrating into the connector, an O-ring (38), a sealing medium (57), and a rubber plug (59) are mounted on the connector. A protector (37) is installed on an insertion portion of the wire harness (35) of the towing vehicle body into the housing (30).

Abstract: A vehicle trailer male electrical connector 10, especially for use with a vehicle tracking or data logging system and which having an array of connector pins 11-17 for interconnecting electrical power between a vehicle trailer and tractor unit, and which includes an electrical switch 43 in an open or closed condition, and which is changed to the other of said open and closed conditions by engagement with a female connector on a tractor unit. The switch 43 is operated by one of said connector pins 11-17 which is axially displaceable on contact with the female connector.

Abstract: A retractable cable device is disclosed. The housing has a receiving space, and the winding spool has a first spool disk and a spring receiving space. The first spool disk includes a receiving groove and a spool shaft. The communication cable is wound around the spool shaft so that an inner winding is formed. One end of the communication cable passes through the first spool disk of the winding spool so that the communication cable is respectively positioned at the receiving groove and the spool shaft of the first spool disk. Both ends of the communication cable protrude the housing of the retractable cable device. The spiral spring is positioned at the spring receiving space of the winding spool, and one end of the spiral spring is coupled to the winding spool and the other end of the spiral spring is coupled to the housing of the retractable cable device.

Abstract: A cable retracting device including a housing with an interior space bounded in part by a side wall. A spindle projects into the interior space from the side wall and rotatably supports a spindle. A number of electrically conductive rings are affixed to the side wall and are concentrically arranged around the spindle. A number of electrical leads are connected to the rings and extend outwardly from the housing. A number of electrical contacts protrude from one side of the spool. Each of the contacts slidably engages a respective one of the rings. Another number of electrical leads is wound about the spool, each of which is also connected at one end thereof to a respective one of the electrical contacts. The leads wound on the spool have another end extending from the housing that can be selectively pulled from the spool. A coiled spring connected to the spool rewinds the leads on the spool in the event that they become unwound.