US2461031A - Terminal fitting - Google Patents

Description

Feb. 8, 1949. A. E. B'RICKMAN l t 2,461,031

TERMINAL FITTING Filed oct. 4, 1945 Patented Feb. 8, 1949 p UNITED PATENT "OFFICE i t v f 'l A' '52,461,031

K y TERMINAL FITTING AAi'ari Brickriran,-New Haven, Conn., assignor to l Vvv"lilac ilimericanSteel and Wire Company of New Jersey, a corporation of New Jersey Application October 4, 1945, Serial No. 620,285

1 Claim. 1

This invention relates to a terminal fitting and more particularly to such a fitting for use with stranded wire structures. In certain installations such as in aircraft, it is desirable to use ttings where the full strength of the stranded wire structure will be developed regardless of any angularity between the end oi the fitting and the axes of the stranded'wire structure. Various iittings have been developed with this purpose in mind but none have proved entirely satisfactory.

It is an object oi this invention to provide a terminal fitting in which the full strength of the stranded wire structure is obtained and in which maximum strength of the fitting is also developed.

This and other objects will be more apparent after referring to the following speciiication and attached drawings, in which:

Figure 1 is a View partly in section oi the tting attached to a stranded wire structure;

Figure 2 is a top plan view of Figure 1; and

Figure 3 is a view partly in section of a modification.

Referring more particularly tothe drawings, the reference numeral 2 indicates a stranded wire structure to which a terminal tting is to be attached. The iitting is made in two parts, one being attached to the stranded wire structure and the other being free to move with respect thereto.'

As shown in Figure 1, the end of the wire structure is prepared to receive the attached part of the fitting by brooming it to form a ball portion 4 and a spray portion 6. The method of brooming a stranded wire structure in this manner is disclosed in my copending application, Serial No. 476,588, led February 20, 1943, now Patent 2,389,951. A ball type fitting 8 of a low melting point metal is then die cast or sprayed directly onto the ball portion 4 with a sleeve portion I6 extending over the stranded wire structure 2. The outer portion I2 oi higher strength metal is then cast directly onto the fitting 8 and the spray portion 6 all in the manner described in my copending application, Serial No. 571,918, filed January 8, 1945. While this method of attaching the fitting to the stranded wire structure is preferred since it protects the damage due to heat, parts 8 and I2 may be applied as one unit to the stranded wire structure wire fromv 2. The end of the portion I2 adjacent the sleeve III is preferably spherical with its center at or near the center of portion 8. The movable portion I4, which is slipped on the stranded wire structure 2 prior to casting the portions 8 and I2 thereto, has an opening I6 therein of a greater diameter than that of sleeve I0. Surrounding the opening I5 is a lip I8 which preferably extends toward the center of the spherical end of tting I2. The end 2 of the lip I8 is preferably spherical and of the same radius as the spherical portion of fitting I2. The end provided with holes 22 for attachment'to any desired element.

Figure 3 shows a second embodiment of my inventionfin which that part of the fitting which is attached to the end of the stranded wire structure 2 is swaged thereon. In this embodiment the fitting I4 is slipped over the end of the stranded wire structure 2 which is not broomed. TheV fitting 24 is then swaged on the wire structure 2. Fitting 24 is provided with a sleeve portion 26 and a ball portion 28 having a diameter approximately the same as that of the end 2i! of lip I8.

When the fitting I4 is attached to the desired part and tension is applied to the stranded wire structure 2, the lip I8 will apply a compressor force to the iitting I2 (or 24) which augments the grip on the end of the stranded wire structure 2. There is bearing between the face 20 of iitting I4 and the spherical portion of fitting i2 (or 24) entirely around the periphery. There is also free universal'joint action between the fittings I4 and I2 (or 24) which permits full strength of the stranded wire structure 2 to be developed regardless of any angularity between iitting I4 and the stranded wire structure 2. 'I'he size of opening I6 may be varied to provide for more or less angularity. The sleeves I0 and 25 prevent the lip I8 from damaging the stranded wire structure. 2.

While two embodiments or my invention have Y been shown and described, it Will be apparent that other adaptations and modifications may be made without departing from the scope of the following claim.

I claim:

A terminal fitting for stranded wire structures comprising a member attached to said wire strucof the fitting I4 is ture, said member having a spherical portion, a one-piece clevis member freely slidable over the wire structure, said clevis member having two spaced apart arms and a connecting portion, said connecting portion having an opening therein for passage of said wire structure, and a. frusta-conical ange surrounding said opening and extending radially toward the center of the spherical portion on the wire structure, the rim of said ange bearing against the end of said spherical 10 1,579,414

portion and the base of said flange being spaced from said arms.

ALAN E. BRICKMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 12,770 Sweden Nov. 19, 1'900

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