Abstract: An electrical switching arrangement for an electric contacting system of an airbag having a short circuit bridge arrangement in a plug, which includes a counter-contact casing and a contact sleeve casing of plastic. In the two casings, there are provided chambers in which are seated connectors connected to electric lines. The casings of the plug are hinged with one another, and a short circuit bridge is provided, in each case, between adjacent contacts in such a way that on opening of the plug, the adjacent contacts are short-circuited first before the connectors of the plug are separated. The contact sleeve casing is constructed substantially in slab form and includes a surrounding casing and an inner casing. The inner casing includes side walls and two front walls, as well as a cover wall and a bottom wall.

Abstract: A hermaphroditic self shorting electrical connector including a housing, a plurality of electrical terminals supported within the housing and electrical shunt apparatus including at least one resilient conductive member, positioned and configured such that when the connector is in an unmated condition the resilient conductive member is in electrical contact with at least two electrical terminals and such that mating engagement of the connector with a corresponding connector deflects the resilient conductive member such that it is no longer in electrical contact with at least one of the at least two electrical terminals. A latch mechanism which is resistant to unwanted decoupling and an arrangement for providing a shield grounding connection to a mounting panel are also disclosed.

Abstract: A system and method automatically providing wrap interconnections for wrap diagnostic capability of analog-digital conversion systems obviating the need for wrap cables. A connector system has a first state wherein DAC outputs are automatically internally routed to corresponding ADC inputs thereby closing a wrap loop whereupon automated DAC to ADC loop tests are performed. A second switching state is provided automatically by insertion of connector plugs into the connector system whereby the loop is broken and DAC outputs and ADC inputs are made available externally to respective output and input connectors. In one embodiment the switching system has application to an audio digitizing capture and playback adapter card. In the first state the card is automatically configured for a wrap diagnostic test.

Abstract: Electrical connector jacks of type having a first set of parallel fingers along one side of a cavity, which are provided with a second set of fingers contacting respective fingers of the first set within pockets in the jack body, modules for adding a second set of fingers to conventional jacks, and patch panels employing such jacks.

Abstract: Ends of electrical conductors 5 of an electrical cable are joined to corresponding self terminating, shielded connectors 4, each comprising, a conductive shell 20 connected to at least one corresponding sheath 8, a dielectric support 29 in the shell 20, a conductive switch contact 23 connected to a corresponding signal transmitting conductor 5 and carried by the dielectric support 29 for disconnect connection to an electrical contact inserted into the shielded connector 4, and an electrical circuit element 24 in contact with the shell 20 constructed for disconnect coupling with the switch contact 23 upon withdrawal of the electrical contact from the shielded connector 4, whereby the switch contact 23 is terminated electrically to the shell 20 through the circuit element 24.

Abstract: A safety edge switch for power-actuated devices such as roller gates, roller grilles, etc., and lifting platforms, working platforms and the like, as well as for the guarding of machines or spaces, for example as safety flooring, with a hollow rubber profile (1) within which there is a knife-edge rib (5), the surface of the rib and the opposing surface of the hollow rubber profile being made electrically conductive and the mutual contact of the surfaces leading to a switching pulse. The requisite conductivity of the hollow rubber profile is achieved by virtue of the fact that the rib (5) and the main part of the hollow rubber profile (1) are made wholly electrically conductive, the conductivity arising through the admixture of conductive substances such as carbon black, graphite, metal powder and the like. The rib and the main part of the hollow rubber profile are insulated from each other by virtue of the fact that ordinary nonconductive rubber is present between these parts.

Abstract: An improved device for delivering RF current to the operating tool of an ultrasonic surgical apparatus which comprises a switch module for selecting said RF current, an electrically conducting metal band connected to the switch module and an electrically conductive O-ring in electrical contact with the metal band and located around the acoustic conecting member of the apparatus.

Abstract: In the power socket in accordance with the present invention, the pin and the stationary and movable contact pieces are disposed in a direction along the surface of a circuit board on which the power socket is to be mounted, so that the length of the plug connection portion of the pin may be shortened. The power socket according to the present invention requires no cover for fixing the stationary and movable contact pieces. Provision is made such that the portions for engagingly securing the pin and a lateral wall of the housing are reinforced by the pin, the stationary contact piece or the movable contact piece, thereby to reduce the housing in thickness.

Abstract: A jack with a switch, the body of which is formed of an insulating material and has formed therein a plug receiving hole and a switch housing portion extending from the back of the body in parallel to but separated by a partition wall from the plug receiving hole. The partition wall has a hole through which the plug receiving hole and the switching housing portion communicate with each other. In the switch housing portion there are disposed a fixed contact piece and an elastic movable contact piece which constitute the switch. A separator is interposed between the movable contact piece and the partition wall, and an actuating projection formed at the tip end portion of the separator protrudes into the plug receiving hole through the hole made in the partition wall. By inserting a plug into or pulling it out of the plug receiving hole, the actuating projection is driven to effect ON/OFF control of the fixed and movable contact pieces of the switch.

Abstract: A connector system is described, of the type which includes a connector with a pair of contacts and a spring-operated device that shorts the contacts until the connector is mated with another pair of contacts, which is of simple and reliable construction. The spring-operated device includes a largely Z-shaped spring (24, FIG. 2) lying in a slot (30) in a connector housing, with the middle of the spring supported by the slot walls and with opposite ends of the spring resiliently biased against the contacts. The housing is an integrally-molded part with first and second housing parts (50, 52) joined by a hinge, and with the first part having a pair of elongated holes (64, 65) for receiving first and second contacts (16, 18) and with a second housing part having a pair of elongated holes (82, 84) for receiving the mating contacts.

Abstract: An electrical connector comprises matable connector housings (10,20) having matable electrical contacts (21), a shorting bar (22) in one of the connector housings (20) and having sloped sections (22A, 22B) with one of the sloped sections (22B) engaging the contact (21) in the housing (20) adjacent the shorting bar (22) when the connector housings are unmated, and a push-up projection (12) on the other of the connector housings (10) and having separate push-up projections (12A, 12B) for engagement with the respective sloped sections (22A, 22B) to push up the shorting bar (22) out of engagement with the contact (21) by one of the push-up projections even if the other push-up projection is broken when the connector housings are mated.

Abstract: An electrical jack assembly for connecting a rotary plug is disclosed for use in a cooking range equipped with a turntable and an oven unit, the assembly includes three main units: a sleeve unit, a casing, and a rear cover; the sleeve unit has a cylindrical sleeve with a central bore for insertion of the plug at its front; the casing incorporates two paired leaf spring contact frames, each having a contact angled inward to form two paired contacts on the plug at different longitudinal points on the plug, each contact has an oil-impregnated roller at its end, and the rollers are each arranged to contact the plug at right angles to the longitudinal axis of the plug; the rear cover is mounted with a switch unit at its rear, the switch unit includes two segments which are mounted across a center hole of the rear cover to form a contact point at a head end of the inserted plug, wherein one segment thereof is provided with an insulating plate which is exposed in the central hole to contact to the head end of the pl

Abstract: A self-terminating network of stations connected by coaxial cable segments with each cable segment having ends with cable connectors for coupling to matching device connecters. Each connector has a switchable termination circuit de-activated by coupling to a matching connector. An uncoupled connector will serve as a terminator. The device connector can be a tap connector for mounting on a printed circuit board, for minimizing the length of the tap, and reducing the distrubance to an attached coaxial cable network.

Abstract: For an electrical connector member which has a plurality of pins which mates with a complementary receptacle member, there is provided a shorting member comprising a thin conductive sheet having a base portion fixedly connected with respect to the connector member in spaced relation with respect to the pins and a plurality of thin elongated arm portions each integrally connected at one end to the base portion and cantilevered therefrom to extend past at least a respective one of the pins, the other end of each arm portion extending laterally outward so as to electrically contact a side of the pin past which that arm portion extends, each of the arm portions having an inherent spring bias so as to urge its laterally extending end portion away from the connector member and into electrical contact with a respective pin so as to short a select number of pins upon disconnection of the connector and receptacle members.

Abstract: An improved connector for connection to and identification and testing of electric components such as integrated circuits is described which features a number of spring biased contact elements normally in contacting relation with a shorting bar. When a particular component is placed in a specified physical relation to the connector, a combination of exposed electrical contacts and nonconductive elements on the component to be tested displace specified ones of the contact members away from the shorting bars, providing a connection pattern which can be detected. At the same time, test signals can be applied to the electric component to be tested. The circuit may be identified and its specific parameters identified and characterized in a single operation according to the invention. Advantageously, the shorting bar is grounded so that any static charge on the component to be tested is grounded before the contact elements are displaced from the shorting bar.

Abstract: A connector having an electrically insulating housing (43) comprising electrically conductive connection elements (13, 15, 17) each having two first contact members (1, 3, 5) and a connection member (7, 9, 11) as well as two electrically parallel arranged, normally closed switches each of which in the closed condition forms an electric connection between one of the connection elements (15) and a first terminal (23) of a resistance element (25), the second terminal of which (27) is electrically conductively connected to another connection element (13). Each switch comprises an operating member (39, 41) which is capable of cooperating with a plug to be inserted into the housing (43) so that when the plug is inserted the switch in question is opened.

Abstract: A jack with a switch includes a square-sectioned body of an insulating resin material which has on its front a cylindrical sleeve for receiving a plug, and an open rear end. The body has an internal regulating rib molded integrally therewith and extending from the rear end of the sleeve toward the rear opening of the body through a hole made in a leaf contact piece, for limiting inclination of a plug inserted into the body. An L-shaped lug is inserted into the body through its rear opening so that the tip of the plug is gripped by top and bottom contact pieces extending from the lug. A separator, inserted into the body through its rear opening, has a U-shaped base portion for receiving the tip end portion of the plug and a pair of movable pieces extending from right and left end portions of the base toward the sleeve.

Abstract: An electrical contact unit is provided for a first main member, which has a mainly planar first mounting surface, and for a second main member, which has a mainly planar second mounting surface and is mountable on the first main member. The first mounting surface and the second mounting surface lie against each other when the second main member is mounted on the first main member. The first main member comprises a male contact member, which has an outer surface and carries electrically conductive male contacts, and a maneuvering pin, which extends out from the outer surface. By means of guide elements, the male contact member is mounted in the first main member for motion generally perpendicular to the first mounting surface between an outer position and an inner position.

Abstract: A computer connector with an automatic loop closure device, said device comprising two flexible metal sheets fixed by one of their ends to the printed circuit plate, so that they are operated by the opposed end by means of pins, which, adequately mounted on the support block, are displaced and press the free ends of the sheets as the cable end connector is coupled to the fixed connector, the device being opened in this case, while, when taking out the cable end connector, the sheets, due to their elasticity, recover their initial position, thereby producing the closure of the device which gives the loop continuity.

Abstract: A releasable connector for electric circuits is composed of a male connector housing and a female connector housing adapted to be fittable in each other. One of the connector housings is provided with a resilient short-circuit member while the other is provided with an insulator member. When the two parts are released from each other, the short-circuit member is resiliently urged against the upper surfaces of the terminals in the one connector housing so as to make a short circuit between the terminals. When the two housings are coupled together, the insulator member in the other connector housing wedges in between the short-circuit member and the terminals in the one connector housing so as to break the short circuit made therebetween.

Abstract: A multi-drop type bus line system having a plurality of terminals respectively connected to a common bus line, in which each terminal has a connector interconnecting with the other terminals and the connectors at the respective terminals are interconnected by means of a connection cable. Each connector is provided with a switch which is actuated each time the connection cable is coupled to the connector of the terminal, whereby when the connection cable is coupled to the connector, the switch releases an impedance matching resistor connected between predetermined terminal pins of the connector. Impedance matching is improved and standing waves are reduced.

Abstract: A modular jack assembly includes a bridging card having conductors for establishing the desired bridging connections. An insert carrying the connector wires of the jack is placed in the jack such that the wires are received in edge slots of the bridging card to provide the electrical connections to the conductors on the card.

Abstract: A power receptacle with alarm switch that is actuatable by a standard grounded three-prong plug to output a switch indication. The device consists of at least one three-prong receptacle wherein the third prong contact assures a common or ground connection upon insertion of a three-prong plug. A switch device is secured on the receptacle to extend an actuating arm adjacent the third prong hole in interfering position such that insertion and removal of the plug causes the third prong to move the actuating arm and produce a characteristic switch indication. An improved form of alarm switch uses a hermetically sealed magnetic switch in association with a spring-loaded plunger/magnet assembly to provide corrosion-proof switching.

Abstract: A sliding switch, for example a microswitch, comprises a membrane between an actuating member and a contact chamber, an intermediate sheet provided between the membrane and the actuating member has three tongues of which a middle tongue simultaneously acts on the first two ends of two double-arm contact bridges disposed parallel to one another, so that a double transfer with a close contact chamber is realized.

Abstract: A tap connector assembly (10) for coaxial cable networks includes a receptacle tap connect or (6) incorporated into the cable network and a plug connector (8) mateable therewith to connect external apparatus into the network. Receptacle tap connector (6) includes first and second signal-carrying contacts (122, 123) and a grounding contact (19) adapted to be connected to signal-carrying conductors (24) and conductive outer sheaths (222) of first and second cables (12a, 12b), respectively, in the network. Contact (19, 122, 123) are adapted to be engaged by terminals (186, 187, 188) in plug connector (8) when plug connector (8) is mated with receptacle tap connector (6) to connect external apparatus into the network.

Abstract: An electrical connector assembly (10) includes a receptacle (12) and a plug (14) engageable with the receptacle (12) to form electrical connections between terminals (42,20) carried by the receptacle and plug. A shunt (52) in the plug (14) is in engagement with a pair of socket terminals (42) when the plug is at least partially disengaged from the receptacle; but when the connectors are fully mated, a cam post (90) on the receptacle (12) enters the plug (14) and moves and holds the shunt (52) out of engagement with the socket terminals (42). The commoning connection is broken when the plug is fully mated with the receptacle, and will become reestablished when plug (14) is or begins to become disconnected from receptacle (12).

Abstract: The invention is a switched patch module which provides convenient access to a plurality of communications or data lines, without undesirable mixing of signals. The patch module is formed on a printed circuit board which completes connections between the conductors of two sets of receptacles, such that these receptacles are hard-wired together. The user can connect either the first or second receptacle to a third receptacle, by selecting the position of a manually-operated two-position switch. However, insertion of a plug into the receptacle selected by the manually-operated switch disconnects the third receptacle from the other receptacles, while insertion of a plug into the non-selected receptacle has no such effect. Also, insertion of a plug into the third receptacle dissconnects the third receptacle from the others, and overrides the effect of the manually-operated switch. When the plugs are removed, the connections selected by the manually-operated switch are restored.

Abstract: An electrical connector for a telephone system comprises a housing moulded in one piece from insulating material with a plug receiving cavity opening at a plug receiving mouth at a front mating face of the housing, a row of spring contacts anchored in a housing cavity wall to extend into the cavity so that the contacts will be resiliently engaged by respective contacts of a complementary plug when inserted through the mouth into the cavity. A compartment with a contact set extends alongside and opens into the plug receiving cavity. A cam integrally formed with a wall of the cavity extends into the plug receiving cavity into the insertion path of a plug, which will, on insertion, urge the cam through the opening and into the compartment, moving the contacts of the contact set relatively apart and breaking the circuit.

Abstract: A patch module is disclosed, into which a plug can be easily inserted. In the preferred embodiment, the patch module has two sets of receptacles, the first set having three receptacles and the second set having two receptacles. Both sets are mounted on a printed circuit board which makes the desired electrical connections. The first receptacle of the first set is permanently connected to the first receptacle of the second set. The second receptacle of the first set is permanently connected to the second receptacle of the second set. The conductors of the first and second receptacles of the second set are normally connected together by contacts on a spring-biased, slidable panel, the panel being mounted for movement along the circuit board. When a plug is inserted into one of the first two receptacles of the first set, the panel slides to its other position, breaking the connection between the first and second receptacles of the second set.

Abstract: The invention relates to a modular jack for telephone equipment. The jack has a pair of switch contact springs which are activated only when a plug of a specific shape is inserted into the jack.

Abstract: A phone jack assembly comprising a piggy-back array of two phone jack housings made of moldable dielectric material and having integral walls defining respective axial cavities wherein a phone jack plug may be inserted; and a plurality of pairs of wire terminals extending downwardly from the lower housing of the array for insertion into respective apertures in a connecting device. Each of the wire terminals is recessed within a respective groove molded into the outer side surfaces of the housings and one of each pair has a portion extended into a cavity of one of the housing for electrical engagement with a portion of a phone jack plug inserted into the cavity. Also each of the wire terminals is provided with a laterally bent portion for pressingly engaging side wall surfaces of the respective groove to support the wire terminal when being inserted into or withdrawn from said respective aperture in the connecting device.

Abstract: A circuit device for connection to contacts located near each other in a row of first contacts in a recess or recesses of electrical apparatus along a first contact axis, the device including a printed circuit board carrying electronic components, and a connecting member attached to and extending from the board and sized to be received in and supported by the recess or recesses with the board oriented transversely to the first contact axis. Second contacts are supported by the member and include contact areas spaced from each other along the first contact axis for mating with corresponding first contacts, whereby the device is connected to corresponding first contacts without blocking access to other first contacts.

Abstract: An electrical connector containing a switch which makes or breaks an electrical connection when the connector is plugged into or unplugged from a mating connector. The switch is located in an aperture in the electrical connector. It is capable of limited reciprocal motion parallel to the longitudinal axis of the aperture. The switch includes at one end a pair of normally touching contacts and a dielectric finger. Electrical connection is broken when the switch reciprocates so that the dielectric finger is interposed between the normally touching fingers and, likewise, electrical contact is made when the reciprocation movement of the switch removes the finger.

Abstract: An electrical double plug and socket connector includes a socket component, a plug component and a short-circuit bridge. Each of the socket and plug components includes an insulating material housing. Metallic contacts are arranged in the socket component housing, and associated metallic connecting elements are arranged in the plug component housing. The plug component housing bounds a receiving space located between the connecting elements. The short-circuit bridge includes a U-shaped spring accommodated in the receiving space but having two arms which project axially out of the receiving space toward associated insulating material lugs of the socket component housing to such an extent that the connecting elements project beyond the arms by more than the distance by which the lugs extend beyond the contacts.

Abstract: A jack having a structure in which a movable contact is driven and separated from a fixed contact when a plug is inserted thereinto and the movable contact is brought into contact electrically with the plug. A free-end part of the movable contact is formed as the plug receptor which is in contact with the inserted plug and is driven by the plug, and both marginal sides of the plug receptor are extended and bent towards the fixed contact to form a pair of holding parts which are provided with flaps extending rearwardly to approach each other. These flaps resiliently hold therebetween the inserted plug. Contact parts are defined at the marginal portions of the holding parts on the side of the fixed contact so as to be in resilient contact therewith.

Abstract: A security system for motels and other properties such as offices and rental properties where small appliances such as television sets, radios, lamps and others are plugged into electrical outlets within rented rooms and which are easily removed by the rentor consists simply of a small disc placed between the appliance's electrical plug and the outlet and if removed, causes the breaker in the circuit feeding that outlet to blow. If a tenant tries to cut the wires without removing the electrical plug, the circuit breaker will also blow. With the circuit breaker blown the tenant must contact the motel manager in order to see what he is removing from the room. An alarm attached to the circuit breaker at the fuse panel sounds when that circuit has no power. The potential signals for separated breakers can be accumulated through a telemetry circuit and are sent to the central office, which will immediately dispatch a house security officer to stop the removal of the appliance or other piece of equipment.

Abstract: A shorting bar assembly is mounted in an electrical connector housing so as to selectively short at least pairs of terminals thereof. Each shorting bar assembly has at least one shorting bar member having at least two integral depending tines extending at an angle with respect to a body of the shorting bar and to the longitudinal axis of an associated terminal. In an unmated condition of the connector the free end of the respective terminal engages the shorting bar tine in a loaded condition. During mating or unmating of the connector, the resilient portion of the terminal is deflected so as to cause a relative wiping movement between the free end of the terminal and the tine of the shorting bar moving between loaded and unloaded conditions.

Abstract: A make-before-break switch arrangement and a circuit element are disposed in a connector shell, the shell having an electrically conductive connector contact and being adapted to couple to a coaxial cable having a shield conductor and a center conductor whereby when disconnected from a compatible connector, an electrical signal passes through a first circuit path comprising the shield conductor, the circuit element, the connector contact and the center conductor, but when connected to the compatible connector, the electrical circuit path does not include the circuit element but passes through the center conductor, the connector contact and a contact in the compatible connector with EMI shielding being maintained through the shield conductor, the shell and the barrel of the compatible connector.

Abstract: A circuit breaker connector (100) for joining the ends of a pair of cables (10, 20) and passing an electrical signal therethrough, including a contact arrangement comprising an input contact (38) and an output contact (44) electrically connected to an internal switch contact (70) with the contacts cooperating to define a first electrical circuit path, and make-before-break switch means (72, 60) allowing insertion of an external circuit element (90) without interrupting the first circuit path for completing a second electrical circuit path including the circuit element (90) before breaking the first electrical circuit path.

Abstract: A programmable shunting strip stamped and formed from sheet metal comprising of web (12) from which a series of contact fingers (13) have been stamped to extend transversely of the web substantially in its plane. Selected contact fingers 13' can be bent to extend transversely of the plane of the web (12) and received in an electrical connector socket (25) to common selected terminals (32) in the socket (25).

Abstract: An electrostatic discharge protected integrated circuit module is disclosed in which an integrated circuit is attached to a flexible circuit board inside a receptacle. Spring action forces the traces of the flexible circuit board against a conducting surface in the receptacle, shorting the traces so that the potential at all contact leads of the integrated circuit will rise uniformly in the event of an electrostatic discharge. A plug connector may be inserted through an opening in the receptacle to interrupt the shorting and to connect the integrated circuit to an electronic device. Protection is restored automatically when the plug connector is withdrawn.

Abstract: An integral switch means on a printed circuit board is provided by a plurality of parallel conductor segments having insulating gaps which are aligned in a column transverse to the conductor tracks. Posts supported on the printed circuit board support and align a rigid support member for an elastomeric member having a plurality of conductor strips positioned to separately bridge the respective gaps of the connector segments on a printed circuit board when the elastomeric member is positioned against the printed circuit board. Spring biasing means extends between support posts and the rigid support member for normally urging the elastomeric member into the printed circuit board in position to close the switches. Actuator means is movably supported relative to the printed circuit board to cooperate with the support member to move the elastomeric member against the bias of the spring away from the printed circuit board.

Abstract: The present invention relates to an assembly forming interfitting socket and plug for connection to a circuit in which the socket is mounted, without the circuit opening. The socket comprises a housing at the bottom of which is housed a switch of the pressure type returned to position of closure by an elastic blade and two first branch contact elements projecting on two sides of the housing; the plug is guided between these sides and has a wide push element which is provided laterally with second branch contact elements coming into contact with the first ones before the end of the push element opens the switch by pushing the elastic blade, so that the continuity of the circuit in which the socket is mounted is preserved when the plug is connected or disconnected.

Abstract: A jack for receiving a plug includes a detachable slide switch operated by a contact strip which engages the plug. Additional slide switches may be nested below the first slide switch, the entire stack being operated by the contact strip as the plug is inserted in the jack.

Abstract: A watthour meter socket assembly of the type which engages the blades of a watthour meter. The blades are frictionally held by pairs of spring-loaded conductive jaws, which form the female contacts of the socket assembly. Helper springs are provided to increase the biasing of the jaws. In order to provide a conductive bypass when the meter is removed for servicing or replacement a reciprocable, conductive blade is mounted on a slide mechanism so that it can be wedged between the jaws. The wedging action simultaneously spreads the jaws apart, allowing removal of the meter.

Abstract: In a tape recorder provided with a power jack which includes a rod-like conductive member, a relay conductive member insulated from the rod-like conductive member, and an elastic conductive member having elasticity and being capable of moving a first position, at which the elastic conductive member is separated from the relay conductive member by inserting a plug to the power jack, and a second position, at which is in contact with and electrically connected to the relay conductive member, a main switch for the tape recorder comprises a cylindrical rotary member having an inner periphery, an outer periphery and a recess formed in the outer periphery.

Abstract: A patch or access module usable with an insertable patch plug having a plurality of electrical contact elements. The patch or access module includes a circuit board, a first electrical circuit electrically connected with a first point on the circuit board, a second electrical circuit electrically connected with the second point on the circuit board and switch contact means for selectively making electrical connection between the first point and the second point and for making electrical connection between the first point and the electrical contact elements of the patch plug upon insertion of the patch plug into the patch or access module.

Abstract: A connector provided in an igniting circuit for connecting an igniting signal generator and a priming device comprises a first connector member and a second connector member which are connectable to each other. The first connector member comprises a pair of signal terminals connected to the priming device and a ground terminal connected to the ground line. The signal terminals are elastically contacted with the ground terminal. The second connector member comprises a pair of signal terminals connected to the igniting signal generator. These signal terminals are insulated from each other. When the first connector member is connected to the second connector member, the signal terminal of the first connector member are automatically separated from the ground terminal and then are contacted with the signal terminals of the second connector member.

Abstract: An earphone jack for tape recorders, into which an earphone plug is inserted, which comprises a housing having an earphone plug insertion hole, an earphone/speaker changeover switch having a fixed contact and a movable contact moved by the insertion of the earphone plug so that it is electrically separated away from the fixed contact to cause the earphone/speaker changeover switch to be turned OFF, and a muting switch disposed in said housing and operated by the operation of the earphone/speaker changeover switch.

Abstract: Apparatus having an integral coaxial antenna coupled via a coaxial connector to its internal circuitry has a coaxial switch/connector for alternatively coupling an external coaxial signal source to the internal circuitry, thus reducing impedance mismatch to a minimum with no impedance matching network required.