US2696517A - Disk type shield coupling - Google Patents

Description

Dec. 7, 1954 s, p, 1R 2,696,517

DISK TYPE SHIELD COUPLING Filed Feb. 12, 1949 Q IQ- I 2/ 1; R\\\\\\\\\\\\ ac; 2a 16 INVENTOR.-

' Wma United States Patent Office 2,696,517 Patented Dec. 7, 1954 DISK TYPE SHIELD COUPLING Stanley P. Bird, Verona, N. J., assignor to Breeze Corporations, Inc, Newark, N. J., a corporation of New Jersey Application February 12, 1949, Serial No. 76,077 3 Claims. (Cl. 174-36) This invention relates to couplings for use with conduits, particularly such as are employed in radio shieldmg.

Experiments have shown that the ideal radio shielded ignition system should provide a continuous conductive cover for the entire ignition system. However, installation consideration and the necessity for removing portions of the ignition wiring from time to time have made it imperative that certain parts thereof be separable from the entire system. At the points where the shield assembly is separable it is customary to provide threaded couplings or other quickly detachable connecting means. Investigation has disclosed that one of the major sources of radio interference from a shielded ignition system has resulted from electrical leakage emanating from the presently used coupling means.

Accordingly, it is an object of this invention to provide a coupling means for use in a radio shielded ignition system, which will minimize the amount of electrical leakage therethrough.

Another object of this invention is to provide a simplified coupling means while retaining the shielding features of a continuous conductive cover.

A further object of this invention is to provide a coupling means which shall be capable of easy assembly and diassembly.

An object of this invention is to provide a coupling which will operate satisfactorily despite repeated disconnection and reassembly thereof.

A feature of this invention is its flange-like construction.

A further feature of this invention is the provision of means to uncouple and unite the elements with a minimum number of tools and in a short amount of time.

The invention consists of the construction, combination and arrangement of parts, as herein illustrated, described and claimed.

In the accompanying drawings, forming part hereof, are illustrated three forms of embodiment of the inven-' tion, in which drawings similar reference characters designate corresponding parts, and in which:

Figure 1 is a top plan view of a coupling, according to this invention, with a portion thereof cut away to show the inner construction.

Figure 2 is a vertical section, taken on line 22, of Figure 1.

Figure 3 is a vertical section of a second embodiment of this invention.

Figure 4 is a vertical section of a third embodiment of a coupling, according to this invention.

Figure 5 is a fragmentary section of the flange shown in Figure 3, somewhat enlarged.

Figure 6 is a fragmentary section of another embodiment of a coupling, according to this invention.

Referring to the drawings, and particularly to Figures 1 and 2, the reference numerals 10, 11 indicate two sections of a shielded conduit. A ferrule 12, 13 is secured to the adjacent ends of the said conduit 10, 11. as by solder. The end of one ferrule is provided with a flange 14 welded thereto, as shown at 27. The said flange 14 is centrally pierced, as indicated at 15, to allow the passage of an ignition wire (not shown) therethrough.

The opposed ferrule 13 is provided with a flange 16 welded thereto, as shown at 28 having an inwardly turned lip 17 thereon. This flange 16 is also centrally pierced as indicated at 18. A shallow well or seat 19 is machined in the forward face of the flange 16. This seat 19 is slightly larger than the outside diameter of the flange 14, which is received therein. The seat 19 thus maintains the flanges 14, 16 in concentric alignment and permits the conduits 10, 11 to be rotated with respect to each other.

A snap ring 20 completes the assembly of this form of coupling. The ring 20 is compressed and slipped within the lip 17. When the ring 20 is released it looks the flanges 1'4, 16 together and presses them into a firm electrical contact with each other. In order to separate the coupling it is merely necessary to compress the snap ring 20, remove it from the flange 16 and the two sections of conduit 10, 11 may be pulled apart.

A second embodiment of this invention is shown in Figure 3. In this form the flanges 21, 22 are identical in shape and comprise flat washer-like plates secured to the ends of the ferrules 12, 13. The plate 22 is constructed of fairly soft metal and has concentric strips of flat wire 23 incorporated therein. The wire 23, best shown in Figure 5, is of such size as to be coextensive with the width of the flange 22. This coupling is joined by applying silver solder 24 or some other suitably conguctzive metallic medium to the periphery of the flanges When it is necessary to part the coupling, it is accomplished by grasping a loose end 26 of the outermost circle of wires and pulling it. This will sever the flange 22 and enable the coupling to be separated. Each of the wires 23 is provided with an extending end 26 for the subsequent accomplishment of this purpose. Thereafter, if the coupling is to be reassembled, the groove left by the removed wire can be filled with solder or some suitable brazing metal.

Figure 4 illustrates a third embodiment of the present invention, in which the lowermost flange 22 has been provided with an upturned rim 25 to receive and seat the upper flange 21 which is soldered thereto, as indicated at 29. The wires 23 shown in connection with Figures 3 and 5 may be incorporated or omitted from this construction, as desired.

It is also within the concept of this invention to bevel the edges of the opposed flange faces to receive a Wire therebetween. Solder can then be applied over the edges and wire to hold the assembly together. Thereafter, the coupling may be parted by extracting the wire in the manner disclosed in connection with Figures 3 and 5.

It has been found that the use of a coupling having extended plane electrical contact surfaces results in a great attenuation of the leakage signal, with a consequent increase in the shielding efficiency of the assembly. An increase in the size of the flanges employed provides greater shielding properties. Said flange size may therefore be varied in accordance with the ignition and radio requirements desired.

Having thus fully described the invention, what is considered as new and desired to be secured by Letters Patent of the United States, is:

1. A conduit coupling for radio shielded wires comprising, opposed conduits, a disc shaped flange upon each of the ends of the conduits to be coupled, at least one of said flanges being formed of a soft metal means consisting of a strip of solder for securing the flanges together at their peripheries, a wire embedded in the soft metal of one of the flanges so as to define a substantially continuous path around the flange spaced from the outer edge thereof and a depending portion of said wire adapted to be grasped so as to pull the entire wire through the metal of the flange along the path of its embedding.

2. A conduit coupling for radio shielded wires comprising, opposed conduits, a disc shaped flange upon each of the ends of the conduits to be coupled, one of said flanges being formed of soft metal means consisting of a strip of solder for securing the flanges'together at their outer edges, a plurality of wires embedded in the soft metal flange so as to define substantially continuous paths around the flange spaced from each other and the outer edge thereof and a depending portion on each of said wires adapted to be grasped so as to pull the entire Wire through the metal of the flange along the path of its embedding.

3. A coupling for radio shielded wires comprising,

extended disc-shaped opposed flanges carried upon the elements to be joined, one of said flanges being formed of a soft metal, strips of solder secured to the outer edges of the flanges to hold the flanges together in electrical contact with each other, a Wire member imbedded in the soft metal flange concentric with the periphery of said flange, said wire being capable of being pulled from the flange so as to separate the flanges without destroying the usefulness of the said coupling.

References Cited in the file of this patent Number UNITED STATES PATENTS Name Date Wiggins Dec. 17, 1878 Warren Nov. 12, 1912 Rijns Feb. 7, 1928 Field Jan. 8, 1929 Ellingsen Mar. 21, 1933 Cline Aug. 29, 1939 Eaton et al. Oct. 17, 1944 Cork et a1. Jan. 17, 1950

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