Coaxial cable connector

May 26, 1953

2,640,118

E. G. WERNER

COAXIAL CABLE CONNECTOR

Filed Dec. 15, 1950

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Distribution Device

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T.V. Receivers

INVENTOR

EDWIN G.WERNER

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ATTORNEY

Patented May 26, 1953

2,640,118

UNITED STATES PATENT OFFICE

2,640,118 COAXIAL CABLE CONNECTOR Edwin G. Werner, Park Ridge, N. J.

Application December 15,1950, Serial No. 200,979 receptacle 14 is connected to a rigid conductor 16 which extends through the aperture in the bushing 10 into another portion of the housing H. Between the base of the receptacle 14 and the ⁵ base of the cavity 12 and bearing against both is a spring 17. A contact member !8 is carried by the conductor 16, and a second contact member 20 is secured to the opposite end of the bushing 10. A fixed resistor 22 is electrically con¹⁰ nected to the contact member 20 and the wall of the housing H. A flexible conductor 24, such as a length of copper braid, is electrically connected to the rigid conductor ί 6 within the housing H and to a terminal 26 in an insulating ¹⁵ closure 28 in the housing H. The electrical conductors 27, 29 of a coaxial cable or an antenna lead-in may be attached to the terminal 26 and to the housing H in conventional manner. Screw threads 30 are provided on the portion of the housing H in which the receptacle 14 is located.

In the use of the connector of the invention, when the male plug 32 of a connector 34 attached to a device to be connected to a coaxial cable distribution system provided with such connectors is inserted into the female receptacle 14, the latter is urged into the cavity 12 of the bushing I il against the action of the spring 17 and is held in that position so. long as the connectors are screwed together. This causes the rigid conductor 16 to move into the housing H thus moving the contact member 18 into the position shown by the dotted portion of the drawing and thereby breaking the contact between the contact members 18, 20 and cutting the resistor 22 out of the circuit. On the other hand, when the device is disconnected, the spring 17 causes the receptacle 14 and the attached rigid conductor 16 to move in the opposite direction, outwardly of the cavity 12, and thereby to bring the contact members 18, 20 into contact with each other and thus to place the resistor 22 in the circuit. The use of the flexible conductor 24 within the housing H permits this movement of the receptacle 14 and the rigid conductor 16 without disturbing the electrical connection to the coaxial cable.

The connector of the invention is particularly advantageous for use in connection with a master antenna system to which several television receivers are connected, for instance in a multipleunit dwelling. Such a system is shown diagrammatically in Fig. 2 of the drawing. There an antenna is connected through a conventional distribution device to a plurality of outlets each of which is provided with a connector embodying the invention. To each outlet may be connected

This invention relates to a device for connecting an electrical appliance to a coaxial cable and refers more particularly to a connector for use in a system where a plurality of such devices as television receivers, microphones, amplifiers, and the like are connected to a coaxial cable distribution system.

The proper, interference-free operation of a television receiver depends in part on its being in balance with its antenna from the standpoint of impedance. In the case of a multiple installation where several receivers are connected to a master antenna through a coaxial cable system, the proper matching or balance of the system is disturbed if a receiver is disconnected from or added to the system. The subtraction from or addition to such a system of one or more receivers consequently may cause faulty operation of other receivers connected to the system. Similar difficulties are encountered in systems where microphones, amplifiers, and similar devices are interconnected through a coaxial cable system.

It is the principal object of this invention to overcome these difficulties. More specifically, it is an object of the invention to provide a connector for a multiple-outlet coaxial cable distribution system which maintains the impedance balance of the system whether or not a device is connected to it.

The invention by means of which this object ₃₀is achieved comprises a coaxial cable connector provided with a fixed resistor of such value as to maintain in the distribution system the proper impedance whether or not an appliance is connected to it and is automatically placed in the ₃₅circuit when an appliance is disconnected and removed from the circuit when the appliance is connected.

In the drawing:

Fig. 1 is a sectional view of a connector em- 40 bodying the invention; and

Fig. 2 is a diagrammatic representation of a master television antenna system to which are connected several television receivers each connected to the system by means of a connector 45 embodying the invention.

Referring to Fig. 1 of the drawing, a connector embodying the invention comprises a metallic housing H adapted to be mounted for example in a conventional outlet box in wall or floor. 50 Secured within one portion of the housing H is an insulating bushing 10 having a central aperture therethrough. Concentric with this aperture is a cavity 12 within which is movably mounted a female receptacle I”. The closed end of the 55

2,640,118 a receiver, and. any one of these receivers, or any number of them, may be removed without causing the system to become unbalanced. Similarly, additional receivers may be connected to the system without disturbing its balance, pro- 5 vided connection is made through a connector of the invention.

The value of the resistor used in the connector of the invention will depend upon its intended field of use. For instance in a, television master io antenna installation the resistor should have a value of 300 ohms.

Although the invention has been described with particular reference to its use in multi-unit television receiver installations, it is not limited to 15 such use but is suitable for use in any coaxial cable distribution system to which a plurality of devices is removably connected. Similarly, although specific details of construction have been described, such description is illustrative only, and 20 equivalent construction within the scope of the invention will occur to those skilled in the art.