Abstract: To provide a high tension connection portion structure for an ignition device for an internal combustion engine, which may prevent an instantaneous breakdown of the connection even if an external force is applied to a high tension connection portion, may enhance a connection property of the high tension connection portion by suppressing a sliding movement between metal terminals of the connection portion and may be applied to the path of a minute current such as an ionic current or the like, a connecting structure of a high tension connection portion used in an ignition device for an internal combustion engine, includes: a first high tension connection terminal 2; a second high tension connection terminal 4 for electrically connecting with the first high tension connection terminal 2; a locking mechanism 2a provided between the first high tension connection terminal 2 and the second high tension connection terminal 4 for restricting the separation therebetween in the axial direction; and a spring member 7 dis

Abstract: Disclosed are an improved probe pin assembly and a method of making the same. Each probe pin uses a sleeve which is formed by stamping and deep-drawing a thin sheet of metal with dies. The sleeve has a contact pin slidably fitted therein, a resilient member contained therein to spring-bias the contact pin with its tip end appearing from the sleeve and a cover plate fastened to and closing the rear opening of the sleeve.

Abstract: A high pin count electrical connector assembly for electrically connecting a set of first conductors to a set of second conductors according to a predetermined connective scheme. The connector assembly includes a male-half connector that has an array of spring-loaded pins, each of which is connected to a separate first conductor, and further has a male half connective bracket. A female-half connector has an array of contact regions positioned in matching arrangement to the array of spring-loaded pins, and each connected to a separate second conductor, and further has a female-half connective bracket configured to releasably mate with said male-half connective bracket so that when said male-half bracket and said female-half bracket are correctly mated together said spring loaded pins are held in contact with said contact regions so that said first conductors and said second conductors are electrically connected according to said predetermined scheme.

Abstract: An integrated BEDC and PCB provided through a low cost, highly reliable interconnect system. The upper and/or lower half of the main insulation assembly of a BEDC is provided with a recess for accommodating at least an edge portion of the substrate of a PCB. The PCB is provided with apertures such as holes for receiving therethrough a bus wire and/or terminal slots through which terminals having wire slots are fixedly staked. The apertures on the PCB are arranged in a predetermined pattern so as to align with corresponding respective apertures in the form of corresponding holes and/or terminal slots on the BEDC at the recess thereof. Accordingly, with the PCB seated in the recess, as the bus wires are laid, they will pass through the holes in the PCB and/or pass through the wire slots of the terminals and thereby provide interconnection therebetween when the two halves of the main insulation assembly are united and the PCB is sandwiched therebetween.

Abstract: A reflex bend in a notched elongated plate member forms a compact terminal structure of a connector without requiring soldering, caulking, or crimping. This contact connects to a connecting pin in a three point contact structure. Two contact points are made by a groove near the terminus of the connecting pin that fits into a slot in the contact. A reflex bend in the contact provides resilient force to the bottom of the connecting pin, thereby forming the third contact point. This connector structure is especially useful for small electric contact where insufficient space is available for mechanical and electrical connections.

Abstract: A snap lock connector particularly well suited to optical fiber systems, is composed generally of a receptacle body having a socket and a plug body having a number of collet fingers. A first fiber optic cable is connected to a first ceramic terminus having a first face inside the socket. A second fiber optic cable is connected to a second ceramic terminus having a second face inside the collet fingers. The first ceramic terminus is fixedly connected to the receptacle body in axial alignment therewith; and the second ceramic terminus is resiliently biased with respect to the plug body in axial alignment therewith. The exterior of the receptacle body has a circumscribed groove for engaging the tips of the collet fingers. The plug body has a locking sleeve slidably mounted thereon for being selectively slid over the collet fingers.

Abstract: A system for bypassing a signal tap that includes a pair of plug ports which are aligned with a pair of contact terminals that connect the conductors to the tap. The system generally comprises a pair of contact plugs adapted to be inserted into the plug ports and a jumper. Each plug includes a generally hollow body and a plunger. The hollow body is substantially open at a first end and terminates in a head surface, having an aperture therethrough, at a second end. Each plunger is moveable between a non-contact position and a contact position. The jumper includes at least two pins which are conductively interconnected and adapted to be inserted into the apertures to allow a signal flowing through the tap to flow through the jumper.

Abstract: An electrical contact test probe for use in providing electrical continuity between diagnostic equipment and a test point of an electrical circuit under test is provided. The test probe includes an elongated plunger slidably mounted within an elongated tubular barrel and extending outwardly therefrom for contacting the test point of the circuit under test. A spring is seated in the barrel and is interposed between the barrel and the plunger for biasing the plunger axially and outwardly of the barrel. The barrel consists of an elongated body having an inner bore, a generally closed end, and an open end. The barrel also has at least one cantilevered tab struck from the body and having a free end projecting into the inner bore toward the generally closed end of the barrel. The tab is located on the barrel such that the free end engages a shoulder of the plunger when the plunger is in an extended position so as to prevent outward biasing of the plunger beyond the extended position.

Abstract: An electrical connector including a support member having a socket or opening to receive a contact member including facing and contacting male and female elements. At least one of the male and female elements comprises a head and integral corrugated resilient tab portion which urges the head into contact with the contact member. The contact member and one of the male and female elements includes a body portion integral with the tab portion forming a hollow tubular guide for the head portion, and a connecting portion remote from the head portion, for connection to an electrical conductor.

Abstract: A tool is described for shunting a multi-tap for an RF cable system by connecting a low-pass filter between an unused input port and an unused output port of the multi-tap. The components of the filter are such as not to interfere with the circuits of the multi-tap when both are in the circuit. A light is provided for indicating when the tool is in operative position.

Abstract: A connector pin which has a structure wherein a pin which can be moved by a spring is kept in contact with a casing by way of connecting member, an electrically conductive magnetic fluid is sustained in the casing, and the casing and the connecting member are magnetized. Owing to this structure, the connector pin is capable of extremely reducing production of metal powders in the casing and has a prolonged service life. Since the electrically conductive magnetic fluid can be sustained by magnetizing the parts composing the connector pin, no sealing member is required for sealing the electrically conductive magnetic fluid and the connector pin has a remarkably simplified structure.

Abstract: A one-piece electrical terminal (10) includes a strip (44) of conductive metal material having a contact portion (14) and a terminating portion (16). The contact portion (14) is fabricated of a relatively soft metal drawn into a shaped contact (18). The terminating portion (16) is integral with the contact portion (14) and is fabricated of a relatively hard tempered metal formed into a spring arm (16) supporting the contact (18).

Abstract: A female power contact which is energized only upon insertion of a male plug. The contact includes a plunger which is biased toward a position which blocks accidental finger insertion into the contact. The plunger also contains sharp points on its outer edge to further prevent accidental finger insertion into the contact. However, insertion of the male plug into the female power contact, against the spring bias, causes the plunger to depress the spring in order to produce an electrical connection between the male plug and female contact.

Abstract: In accordance with the present invention, two types of polymeric dielectric systems useful in construction of a high-temperature electrostatic chuck are disclosed. Further, a high temperature power connection for transmitting power from a supply source to a conductive extension from the electrostatic chuck conductive layer is described. The first polymeric dielectric system provides for the use of polyimide films which do not require an adhesive to adhere to an underlying substrate support platen. The self-adhering polyimide film comprises from one to three layers of polyimide material, wherein at least one outer layer of polyimide material is thermoplastic in nature, for the purpose of adhesion and/or encapsulation. When the film comprises two layers, one of the layers is a non-thermoplastic polyimide having an increased glass transition temperature of about 350.degree. C. or greater.

Abstract: A spring-loaded ball contact device having a housing, a spring disposed in the housing, a moveable plunger disposed in the housing that contacts the spring, a freely moveable ball contact disposed at an end of the plunger, and a lubricant stored within the housing for lubricating the ball contact. A rotary connector using the spring-loaded ball contact devices has first and second printed wiring boards that rotate relative to each other that are electrically interconnected using a plurality of spring-loaded ball contact devices disposed on the first printed wiring board. The spring-loaded ball contact devices are used to transfer electrical signals or power to conductive contacts formed on the second printed wiring board.

Abstract: A butt terminal in which the number of component parts is small, and a small-size design can be achieved, and a sufficient fitting displacement amount can be obtained, and a stable electrically-connected condition can be obtained. In the butt terminal of a two-part construction of the invention, a female terminal, having a sliding contact piece, and a male terminal are butted to be electrically connected together. The female terminal includes a box-like body of an electrically-conductive material which has a stamped piece portion which is formed on at least one of first opposed walls of the box-like body, and is bent inwardly to be slanting rearwardly, and sliding grooves formed respectively in second opposed walls.

Abstract: A solid spring electrical connector includes an elongated metal bar of sufficient cross sectional area to carry high electrical current loads. The bar is contained in a barrel with terminals of the bar projecting from opposite ends of the barrel. The bar is an integral piece which includes a spring section extending most of the length of the bar. The spring section is formed by axially spaced-apart, parallel, linear, narrow-profile notches of generally uniform width having alternating open ends facing toward opposite sides of the bar progressively along its length. Each notch extends across a major portion of the diameter of the bar thereby forming a resilient spring section in which the metal between adjacent notches forms the equivalent of long narrow flexible beams with alternating pivot points. In an alternate embodiment, electrical connectors adapted for mounting to printed circuit boards include a plurality of spring contacts in a row along the length of the connector.

Abstract: A radiotelephone includes front and back housings, a printed circuit board disposed between the housings, and a battery having a pair of terminals secured to the back housing. A pair of fasteners secure the front and back housings together while sandwiching the printed circuit board therebetween and at the same time, provide an electrical connection between the battery terminals and conductive strips formed on the printed circuit board.

Abstract: A test probe contact comprises a plunger 1 having a pointed tip 4 formed into a pyramid configuration having an apex 9 and a plurality of slant faces 10--10 meeting at the apex 9 so as to form a ridge 8 between adjacent two slant faces 10 and 10. The pointed tip 4 is connectable with a check land 11 of a test member. A barrel 2 holds the plunger 1 therein so that the plunger 1 slides in an axial direction thereof. A sliding movement of the plunger 1 causes the ridge 8 of the pointed tip 4 to cut the surface of the check land 11 along a ridgeline of the ridge 8. A spring 3 resiliently supports the plunger 1 in the axial direction of the plunger 1 for giving an elastic reaction force to the plunger 1 when plunger 1 is pushed against the check land 11, thereby breaking through the surface of the check land 11 by the ridge 8 so as to establish an electrical connection between the pointed tip 4 and the metal portion of the check land 11.

Abstract: A connector in which the sliding movement of a movable contact member is stabilized, thereby securing a positive electrical connection. In the connector of the invention, a hollow connection terminal is fitted in a connector housing, and a coil spring and the slidable, movable contact member are received in this connection terminal. When the two connectors are fitted together, the coil spring urges the movable contact member toward a front end of the connector, thereby providing a sufficient contact load. A resilient, electrically-conductive contact band is provided in a gap between an outer peripheral surface of the movable contact member and an inner peripheral surface of the connection terminal. The connection terminal and the movable contact member are electrically connected together through this contact band, and this contact band prevents the movable contact member from being displaced in a direction perpendicular to the direction of fitting of the connection (that is, the axial direction).

Abstract: A power source socket includes a casing fixed to a vehicle. The socket has a contact coupled to a power supply. The contact of the socket is electrically connected to a contact of a plug of an electrical device when the plug is inserted into the casing. The socket has a contact fixed to the casing. The socket also has a movable contact movably accommodated in the casing. The movable contact has a first contact portion and a second contact portion. The first contact portion contacts the fixed contact. The second contact portion contacts the plug contact. The first contact portion also contacts the fixed contact in accordance with the engagement of the plug contact and the second contact portion of the movable contact when the plug is inserted into the casing. The contact portion of the movable contact is separated from the fixed contact in accordance with the movement of the plug contact away from the movable contact when the plug is removed from the casing.

Abstract: An image forming apparatus of the type having a rotary developing device or revolver, and a power supply device. When the revolver is rotated to bring one of its developing sections to a developing position, the end of a developing roller disposed in the developing section faces a bracket mounted on a rear wall included in the apparatus body. A retractable rod-like terminal is mounted on the bracket and constantly biased by a spring. A bias for development is applied from a bias circuit to the developing roller via the retractable terminal.

Abstract: Telescoping spring probes include a barrel having a hollow cylindrical body with a passageway extending from a closed barrel end to an open barrel end. The open barrel end is crimped radially inward into the passageway. A plunger axially disposed within the barrel passageway comprises a hollow body having an internal cavity extending from an open plunger end to a closed plunger end. The open plunger end disposed within the barrel passageway faces the closed barrel end. The plunger body has an outside surface portion with a diameter greater than the crimped barrel open end to prevent the plunger from exiting the barrel. A spring is disposed axially within the barrel passageway and the plunger cavity. In a first embodiment, the plunger body includes an inwardly deflected detent contacting one end of the spring to imposes a spring force which biases the plunger body against the barrel passageway.

Abstract: A fluorescent lamp with spring-loaded terminal pins includes a tube having an inner surface and an outer surface; an amount of electrically excitable gas disposed in the tube; a fluorescent chemical coat disposed on the inner surface of the tube; a pair of electrodes with each electrode positioned within the tube near each end thereof; a pair of base caps each sealed to a separate end of the tube such that the length of the tube including base caps is about four feet; and a pair of spring-loaded terminal pins extended through each base cap and coupled to the nearest electrode for delivering electrical energy thereto.

Abstract: An inner conductor for a high frequency microwave coaxial connector comprising a cylindrical conducting member with a central bore and slots that form fingers, and a cylindrical pressure contact member that is inserted in the cylindrical conducting member. The cylindrical pressure contact member has a tapered end so that when the fingers of the cylindrical conducting member contacts the tapered end, axial pressure is produced along a central axis of the cylindrical pressure contact member to force the cylindrical pressure contact member out of the central bore of the cylindrical conducting member to thereby produce an axially resilient coaxial connection with another microwave device.

Abstract: A spring is wound on a connection terminal with one end thereof fixedly secured to the connection terminal. A spiral protuberance is formed on a bore wall of a holder hole and is engaged with the spring. With this construction, when the connection terminals are to be fitted together, the spring is guided by the spiral protuberance to be angularly displaced, and at the same time, the connection terminal fixed to the spring is also angularly displaced in synchronism therewith. Therefore, even if dust or the like deposits on connection terminals, it can be removed by the rotation of one of the connection terminals during the fitting operation to maintain a good electrical connection.

Abstract: A termination system for a solar panel of the type in which the photoactive material and a silver terminal pad are covered by a protective layer of an insulative material includes a hole through the protective layer exposing a portion of the silver pad and further includes a terminal body having a base that is bonded to the protective layer and having a bore extending through the terminal body and concentric with the hole in the protective layer, and further including a compression spring inserted into the bore in the terminal body and bearing against the silver pad and urged against the silver pad by a sphere that is moved toward the silver panel through the bore in the terminal body by advancing a set screw. The sphere ensures that as the set screw is turned no torque is imparted to the spring. The resulting termination is inexpensive and easy to make, and it provides a good solderless contact with the silver pad and is mechanically robust and hermetically sealed.

Abstract: An electrical contact is disclosed in which a contact pin having a head portion is reciprocated relative to a contact housing between upper and lower positions. The contact housing has a cylindrical portion with two oppositely opposed diagonal slots formed in the wall of the housing. A dowel pin is inserted through the slots and connected to the lower portion of the contact pin. When the contact pin is pushed to its lower position, as by placement of a corresponding contact on the contact pin, the dowel pin slides down the slots, including rotation in the contact pin about its axis. The rotation causes the contact pin head portion to be wiped against the corresponding contact, cleaning the head portion and preventing the build-up of undesirable oxides, dirt or other debris on the surface of the head portion.

Abstract: Pin-and-socket signal cable connectors of the type exemplified by D-SUB series connectors can be quickly mated and unmated many thousands of times without damage to their terminals and without misalignment errors, by so forming the terminals of one or both of the connectors of a connector pair that they can move with respect to their connector body against a spring bias, and that the pins and sockets mate in abutting relationship rather than in frictional engagement. Modified connectors and adapters for standard connectors are disclosed.

Abstract: A high current connector for electrical plug-in contact devices is disclosed which has a sleeve or tubularly-shaped press-fit portion, which is provided with a relatively long jacket area, which is bulged in a barrel-shaped manner, between two short cylindrical jacket areas. A press-fit portion of the connector member is located on the bulged jacket area.

Abstract: A high voltage contact assembly comprising two dielectric housing members adapted for fastening together, the first dielectric housing member having a first conductor inserted therein, the second dielectric housing member having a second conductor inserted therein and spring means sandwiched between the first conductor and the second conductor, the second conductor fastened to a high voltage cable member, such that, when the dielectric housing members are fastened together, the first conductor member extends above the surface of the first housing member. The contact assembly of the invention is useful for mounting in a base plate support for an electrostatic chuck in an etch chamber.

Abstract: A contact pin subassembly including a plurality of contact pins, a contact pin holder which holds the contact pins and which is provided with a plurality of insulation ring portions in which the associated contact pins are slidably fitted, and springs which are held in the contact pin holder to bias the contact pins outward from the insulation ring portions. The contact pins subassembly may be combined into an assembly with a camera body, a lens, or some other subassembly of a device or instrument which requires contact pins, by mounting to the respective subassembly.

Abstract: A system is provided for effectively and efficiently interconnecting a first rigid circuit with a second rigid circuit. The interconnected circuit system includes, in addition to the first and second circuits, a compressive conductive member and a rigid conductive member. The first circuit has means for interconnecting engagement with the compressive conductive member. The second circuit has means for interconnecting engagement with the rigid conductive member. The compressive conductive member has a first end for interconnecting engagement with the first circuit and a second end for interconnecting engagement with a first end of the rigid conductive member. The rigid conductive member has a first end for interconnecting engagement with the compressive conductive member and a second end for interconnecting engagement with the second circuit. The first end of the compressive conductive member interconnectingly engages with the first end of the rigid conductive member.

Abstract: An electrical receptacle which has a plastic housing defining a socket lined by a tubular sleeve contact for receiving a conventional electrical adapter plug. The adapter plug has a body supporting a contact tip which is either retractable or non-retractable. This contact tip projects from an end of the adapter-plug body to mate with a central contact located at one end of the receptacle socket. The adapter plug also has another contact which projects from the periphery of the adapter-plug body to mate with the sleeve contact of the receptacle. The central contact of the receptacle is carried on a support fixed to the housing which communicates with the receptacle socket to establish electrical circuit connection with the adapter-plug contact tip in response to the insertion of the adapter plug into the socket. The central contact is spring-loaded and movable relative to its support so as to provide a retracting movement in response to the force applied by an adapter-plug contact tip.

Abstract: A connector for an LGA IC device or a PGA IC device comprises an array of terminals in a housing each with a receptacle portion receiving a contact member mounted on the upper end of an axially extending compression spring for tilting movement into engagement with the receptacle wall at two, axially spaced locations by engagement with a pin or land depressing the spring. The contact member may be retained within the receptacle providing a socket for a pin of a PGA IC device or formed as a pin protruding from the free end of the receptacle for engagement with a land of an LGA IC device, in both cases providing a force assisting disconnection of the device.

Abstract: A female contact having a shell that encloses a collet that has an opening in a first end of the collet and that has a second end that is configured so that, when a male pin is inserted through the first end of the collet, it pushes on the second end of the collet either directly or indirectly through some mechanism such as a spring. This female contact has a small diameter that makes it particularly suitable for certain applications and in some embodiments extends outward from the shell to facilitate inserting a male pin into the collet.

Abstract: An electrical accessory plug for insertion in the socket of an automobile cigar lighter receptacle of the type provided with a grounded shell and live resilient clip contact fingers which have a rigid mounting. The plug has electrical conductor strips for connection to an electrical cord, and has at its inner end a retainer shoulder adapted to engage and to be frictionally embraced and retained by the live clip contact fingers of the cigar lighter receptacle. A spring-biased contact plunger at the inner end of the plug is connected to one of conductor strips. The plunger is adapted for abutting engagement under spring pressure, with the rigid mounting of the contact fingers of the cigar lighter receptacle when the plug body is positioned deeply in the receptacle.

Abstract: An electrical connector which can be panel or inline mounted, and accommodates coaxial, waveguide, or mono-conductor cables. The connector is comprised of two separable halves which mate to form continuous electrical connections. One connector half presents a planar surface carrying two electrically conductive zones, the other connector half carries spring biased electrically conductive protrusions for contact with the zones of the first half to create intimate electrical continuity between the two halves.

Abstract: A tubular body supports an insulator member at its front end which carries a center contact. An electrical lead is connected to the center contact and extends through the tubular body rearward and out of the apparatus. The insulator member and support structure supports a shell or wall spaced from and surrounding the tubular body with an opening facing rearward. A plurality of angularly spaced apart latch openings extend through the shell. A plurality of latches are pivotally supported to the front portion of the tubular body for movement through the latch openings. A sleeve with a cam movable between forward and rearward latching and unlatching positions is located around the tubular body. In the forward position of the sleeve, the cam and a spring move the latches outward through the latch openings and in the rearward position of the sleeve the latches are moved inward through the latch openings. An electrical lead is electrically coupled to the latches by way of the tubular body.

Abstract: A spring contact twisting electrical contact spring probe for testing electrical printed circuit boards includes a barrel having a spring seating end and an open end, a compression spring seated in the closed end of the barrel, and a plunger inserted into the barrel. The plunger includes a tail section, connected to a twister section comprising a square rod twisted along its longitudinal axis, and a shaft or probe section that protrudes from the barrel and includes the probe tip. Four crimps in the barrel retain the plunger inside the barrel and interact with the helical crests on the twister section to cause the plunger to rotate along its longitudinal axis as it reciprocates within the barrel. The twister section is retained entirely within the barrel at all times. The rotating plunger tip has edges that scrape off contaminants or coatings on the test sites of the circuit boards to obtain a sufficient electrical connection.

Abstract: An electric connecting clamp for an ignition unit of a model engine has a cell casing which is threadably coupled with a fixed clamping member at the front end thereof. The fixed clamping has a forwardly extending first clamping portion of arc-shaped cross-section. A movable clamping member is pivotally attached to the fixed clamping member. The movable clamping member has a second clamping portion of arc-shaped cross-section which has a front end to define a mouth with the front end of the first clamping portion. An inclining portion extends rearward and radially outward from the second clamping portion and is pivoted to the fixed clamping member. A conductor extends from the cell casing to a contact member provided adjacent the mouth. The contact member is biased to the mouth and the second clamping portion is biased to the first clamping portion.

Abstract: A low impedance, spring loaded electric connector which comprises a cylindrical body receiving a conductive wire, a plunger guided by the body and having a tip for electrically contacting with an external conductive surface, a spring compressed between the body and the plunger. The plunger can slide along the body, and is biased by the spring to assure reliable contact with the conductive surface. This connector, further, includes a resilient and conducting cantilever making sliding contact between the plunger and the body for establishing an electric path bypassing the spring. The cantilever may be formed as a portion of the plunger, or alternatively may be made as a separate one attached to the plunger or the body.

Abstract: In a system for the programming of a measuring instrument which is installed in an automotive vehicle and has a front plate and a cover glass and within which an electric circuit is arranged, openings which are aligned with each other are provided in the front plate and the cover glass. Within the region of the opening there are provided in the front plate contacts which are connected with the electric circuit. The contacts can be formed of conductive paths of a circuit board which is arranged parallel to the front plate. A plug which can be introduced into the openings has axially resilient contact tips, at the end of the plug facing the circuit board, and it is provided with a device for locking the plug within the opening in the cover glass.

Abstract: A moveable contact plunger assembly for interconnection of electrical wires between adjacent railway cars. The assembly has a plunger with a shoulder which fits in abutment with a mating shoulder in an aperture of a dielectric connector block. A follower element is arranged for electrical contact with the plunger. A spring is arranged to allow axial deflection of the plunger relative to the follower element and of the follower element relative to the dielectric block shoulder. Electrical continuity between the plunger and the follower element is obtained by means of a wire which is crimped to the follower and to the plunger. A guide pin mounted on the follower element and a guide slot on a spring barrel portion of the plunger coact with the spring so as to allow axial travel of the follower and of the plunger as well as a rotating motion of the plunger during its axial travel.

Abstract: The invention relates to a connection unit of universal type. This comprises two complementary connection elements (1,2) with a coaxial structure having at least one peripheral part and a central conductive core. The peripheral part(s) of one of the connection elements (1) are in sleeve form. The sleeves (10) and the contact (11) are mounted movably in translation in the direction of the longitudinal axis .DELTA. of the male element (1). The sleeves (10) and the contact (11) are mechanically independent. The connector of this invention has application to connectors for radio frequency and/or numerical or analog signals.

Abstract: An electrically heatable fixed rear window of a motor vehicle has resistance heating strips extending over part of the window area and a bus bar which electrically connects the resistance heating strips to each other and provides a contact on the window which cooperates with, and a counter-contact on the motor vehicle body which is connected to an electrical power source such as the motor vehicle battery.The counter-contact on the motor vehicle body comprises a compression spring-loaded pin which moves in the direction perpendicularly of the window surface, which is connected at its rear end to a power cable connected to the electrical power source and which is operatively connected to the bus bar at its front end surface.