US2457722A - Connector for coaxial cable - Google Patents

Description

Dec-'28, 1948- c. Mm. PUCKETTE, JR O 2,457,722

CONNECTOR FOR CO-AXIAL CABLE Filed March 23, 1,945

' I NVENTOR @mM/@M74 ATTORNEY Patented Dec. 28, 1948 CONNECTOR FOR COAXIAL CABLE Charles McDonald Puckette, Jr., Ridgewood, N. J., assigner to Allen B. Du Mont Laboratories. Inc., Passaic, N. J a corporation of Delaware Application March 23, 1945, Serial No. 584,274

This invention relates to a device by which one or more wires may be easily and quickly attached to the central and outer conductors, respectively, 4

of a coaxial cable connector.

In carrying out the invention one of the wires is connected to a binding post which is provided with a stud that extends into a tubular male contact member to which it maybe soldered and which is the inner member of the connector. The wire which is to be grounded may be connected to a sleeve that may be grounded by installing the device. l

The invention may be understood from the description in connection with the accompanying drawing, in which:

Fig, 1 is a longitudinal section through a socket and part of a metal chassis wall to which it is connected; and

Fig. 2 is a longitudinal section through the device.

Although this invention is suitable for connecting two wires or a pair of wires to a connector for a coaxial cable, it will be specifically shown and described with the cable connector connected to the inner and outer Wires of a coaxial cable. From this it will be obvious that the connector can be connected to other pairs of wires.

In the drawing, reference character I indicates a coaxial cable that may, for example, be connected to the connector -of this invention. This cable I is made up of insulating material containing a center lead 2 and the stranded cylindrical lead 3 which is twisted as indicated at 4 after a portion of the insulation material has been removed at the end of the cable Reference character 5 indicates a portion of a. wall of a cabinet in which a device is located that is provided with a terminal 6 into which the center lead of the coaxial cable is to be electrically connected. The wall 5 may be grounded in any convenient way. A metal socket 1 is attached to this wall by screws 8 passing through the ilange of the socket. A sleeve 9 of insulating material is located inside of the socket 1. The parts just described are old and well known.

A metal shell or sleeve I 0 that is -knurled at one end, as indicated at Il, and is threaded on the inside of that end, as indicated at I2, has an internally extending rim I3 at its other end. A hollow metal disc or washer I4 is placed at the end of the shell I0 when two separate wires are to be connected to the connector.' A disc I5 of insulating material of the'same diameter as the shell I0 and washer I4 has an annular extension 7 claims. l (C1. 174-19) 2 IB with a thick metal disc I1 anchored in the end thereof.

A metal binding post 20 has a reduced inner end portion 2| and a threaded outer enlarged portion 22 terminating in an outer disc or head 23. A thumbpiece or button 24 of rigid insulating material is provided with an internally threaded nut 25 which is rmly secured therein and fits the threaded portion 22 of the binding post 20.

A metal tube or sleeve 21 having an enlarged end portion 28 with sharpened lugs 28 along its outer edge is loca-ted coaxially with the binding post 20. The enlarged end portion 28 has an annular inwardly extending rib 29 which extends into a corresponding groove 30 in the solid cylinder 3| of insulating material so that this cylinder is securely anchored in place in the portion 23. 1

A metal tube 32 is provided into which the end 2| of the binding post 20 extends and is securely attached or fastened both electrically and mechanically to this binding post by solder 33.

The inner end of the tube 21 is enlarged and thickened as indicated at 3l and is externally threaded as indicated at 34' to nt the threads I2.

A cylindrical extension 35V is providedon the thickened portion 34 and has spaced lugs 36 that extend through holes I4' in disc |4 and into holes I5 in the disc I5 to prevent relative rotation of these parts.

A threaded integral, radialextension 31 is provided on the shell I0 to serve as a binding Apost upon which tlie button 38 of insulating material is mounted when two leads are to be connected 35 to this connector.

l The operation is as follows:

The tube 21 is introduced into the shell I0 by screwing the external threads 34' through the internalthreads I2, and then moving the tube 21 to the position shown in Fig. 2 with the lugs 33 extending through the holes I4' in disc Il and into holes I5 in disc I5. Good electrical contact is made between tube 21 and disc I4 when-this disc is present in the device.

The binding post 23 is inserted so that the end portion 2| extends through the metal tube 32 and this end portion is soldered in place as shown at 33. This keeps the binding post 20, tube 32,

cylinder 3|, tube 21, disc Il when present. disc 5 and disc I1 from turning or moving axially with respect to one another, but leaves the'shell I0 free to move on the cylindrical portion 35.

For example, when a coaxial cable is to be connected to this connector, the insulation is removed from the end of the cable exposing the leads 2 and I and the ilne wires oi lead 3 are twisted together to'iorrn lead I, and the leads 2 and 4 are kepti'rom contacting in any convenient way. Lead 2 is wrapped around binding post 2li and nut Il is screwed up to clamp the wire 2. VLead 4 is wrapped around the metal of the other binding post Il when a second or ground wire is used and the button il is screwed up.

The shell Il is brought up to screwing the threaded portion l2 upon the outer threaded portion oi this socket 1 and making contact between the lead 4 and socket 1 through extension 31, disc Il and tube il. The rim il bearing against the enlarged end I4 of tube 21 carries the cylinder 3i, tube I2 and binding post ,2l to the left to make contact between tube I2 -)y threaded portion.

2. An electrical connector comprising a shell having an internally threaded portion near one end thereof and an inwardly extending rim at the other end thereof. a tube in said shell having an externally enlarged threaded portion thereon adapted to engage said internally threaded portion, said shell extending axially of and being revoluble on said tube,` and a binding post rigidly attached to said tube and extending entirely therethrough.

3. An electrical connector comprising a shell having an internally threaded portion near one end thereof and an inwardly extending rim at the other end thereof, a tube in said shell having an externally enlarged threaded portion thereon adapted to engage said internally threaded portion, said shell extending axially oi' and being revoluble on said tube, a binding post rigidly attached to said tube and extending entirely therethrough and another binding post electrically ccnnected to said shell.

the socket 1 and v turned by grasping the knuried portion Il, thus Number 4. An electrical connector comprising a shell having an .internally threaded portion near one end and an. inwardly extending rim at the other end thereof, an externally threaded socket for engagement by said internally threaded portion, a tube in said shell having an externally enlarged threaded portion thereon adapted to engage said internal threaded portion, said shell extending axially of and being revoluble on said tube, and a binding post rigidly attached to said tube and extending entirely therethrough.

5. An electrical connector, comprising a binding post having two separated smooth portions and two separated threaded portions, insulating material fixed on said binding posta metal sleeve around said binding post, means to prevent relative rotation between said sleeve and said insulating material, a metal sleeve around said iirst named metal sleeve, a metal disc between the main portion of said sleeve and said insulating material and a different binding post connected tosaid disc.

6. The device of claim 5 in which a projection on the upper end of said 'ilrst named metal sleeve extends axially of it.

7. The device of claim 5 in which a metal disc tosupport a binding post is provided between the major portion of said first named sleeve and said insulating material, and a projection cn said first named sleeve that extends into said disc to provide electrical contact with said disc.

CHARLES McDONALD PUCKETTE, Jn.

REFERENCES CITED Thefollowing references are of record in the ille of this patent:

UNITED STATES PATENTS Name Date 740,952 Van Aller Oct. 6, 1903 893,880 Smith July 21. 190B 1,101,939 Knaui'i June 30, 1914 1,410,251 Hoegg Mar. 21, 1922 1,167,232 Trood Jan. 4, i916 1,701,666 Diener Feb. 12, 1920 1,862,097 Riemenschneider June 7, 1932 2,095,254 Holliday et al. Oct. l2. 1937 2,376,725 Richardson et al. May 22, 1945 2,405,081 Frei Aug. 13, 1946

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