US2421456A

US2421456A - Anchor for plural electric conductors

Info

Publication number: US2421456A
Application number: US572661A
Authority: US
Inventors: Carl H Judisch
Original assignee: Whitney Blake Co
Current assignee: Whitney Blake Co
Priority date: 1945-01-13
Filing date: 1945-01-13
Publication date: 1947-06-03
Anticipated expiration: 1964-06-03

Description

June 3, 1947. c JUDlSCH I 2,421,456

ANCHOR FOR PLURAL ELECTRIC CONDUCTORS Filed Jan. 15, 1945 CARL H. JUDISCH ATTQRWEVJ Patented June 3, 1947 ANCHOR FOR PLURAL'ELECTRIC CONDUCTORS Carl H. Judisch, Hamden, Conn, assignor to The Whitney Blake Company, .Hamden, Conn, a corporation of Connecticut Application January 13, 1945,'Serial No. 572,661

'5 Claims. 1

The present invention relates to improvements in anchors for plural electric conductors, i. e., anchor-means whereby plural electric conductors may be firm-1y held against axial displacement.

'Oneof the objects of the present invention is to provide superior anchor-means whereby plural electric conductors may be securely held against axial displacement without requiring the knotting of the conductors.

Another objectof the present invention is to provide 'superior anchor-means whereby plural electric conductors may be anchored to a body of insulating-material, despite poor adhesion between the insulation of the conductors and the said body of insulating-material and without requiring theknotting of the conductors.

A further object of the present invention is to provide superior anchor-means especially suited for anchoring plural electric conductors of the type wherein the individual conductors are each provided with an insulating-coating which is scparably-adhered to the insulating-coating of an adjacent conductor.

With the above and other objects in view, as will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out the present invention are shown for illustrative purposes:

Fig. 1 is a view in side elevation of abushinglike body of insulating-material having double insulated electric conductors anchored thereto, in accordance with the present invention;

Fig.2 is :a central-longitudinal sectional 'view thereof taken on theline 2-2 of Fig. l but with the electric conductors and the anchoring-mem her in elevation;

Fig. 3 is a central-longitudinal sectional view taken on the line 33 of Fig. 2 but with the electric conductors and the anchoring-member in elevation;

Fig. 4 is a transverse sectional view taken on the line 4- of Fig; l; and

Fig. 5 is a transverse sectional view corresponding to Fig. 4 but showing a modified form ofthe present inventionin which the separate anchoring-member is omitted.

The assembly illustrated in Figs. 1 to 4 inclusive of the accompanying drawings, includes a bushing iii, a plate-like anchoring-member H and two electric conductors l2 and Beachcomposed in thejnstance shown, ,oi a plurality :of

relatively-fine strands of wire and respectively provided with coatings of insulation I4 and 15.

The bushing it above referred to constitutes what may be termed a holding-body and'may be formed'of any suitable material, 'thoughit is preferable that it be formed of material which is both resilient and insulating such, for instance, as rubber, synthetic rubber, or any one of the wide variety of synthetic plastics. The said bushing is preferably provided about midway of its length with an annular groove l6 for purposes as will hereinafter appear, The respective opposite ends of the bushing l0 taper away from the groove is and: inwardly to provide two oppositelysloping sonically-contoured portions l1 and I8 each of which has a diameter at its outer "end which is smaller than the diameter of the bottom-wall of the annular groove 16. The proportionin'g just referred to is such that when it is desired to insert the resilient bushing l9 and the attached electric conductors l2 and '13 through an aperture in a panel or'the like, one of the outer endsof the bushing will provide the desired lead-in and-permit the bushing-to be readily inserted'into the aperture so as to compress the resilient material of which the said bushing is formed, until such time as the groove l6 orits equivalent is brought into alignment with the panels, whereupon the resilient material will spring outwardly and the bushing will be firmly held in place in the panel by the entry of the latter into the groove 15.

In-theinstance shown,lthe respective coatings ofiinsnlation l4 and i5 of-theelectric conductors iiZ-and 13, arenonnally adhered together at their adjacent faces in a manner well known in the art, though "obviously other forms of plural conductors may be utilized'in connection with the present invention.

The plate-like anchoring-member ll may be formed of anysuitable material such, for instance, as indurated fiber and is totally embedded withinthebushing t0 for purposes as will hereinafter appear.

In producing the assembly above referred to, an intermediate portion of the assembly comprising the two electric conductors l2 and I3, together withtheir respective coatings of insulation .14 and 15, may be. separated laterally and the anchoring-member H inserted therebetween into substantially the relationship illustrated in the drawings. Now by means of any suitable molding. operation, the bushing ID or its equivalent may be-molded around the spread-apart portions of the electric conductors l2 and t3 and the anchoring-member H and preferably in such manner that the insulating-material of the bushing flows into the voids between the parts ll, [4 and I5.

In the manner above described and illustrated in Figs. 1 to 4 inclusive of the accompanying drawings, the electric conductors l2 and 13 are firmly anchored against axial displacement with respect to the bushing IO, even should there be substantially no adhesion between the coatings of insulation l4 and i5 and the material from which the bushing I 8 is formed. As endwise pull is exerted on the electric conductors l2 and [3, which might tend to axially displace thesaid conductors with respect to the bushing 10, any tendency of the conductors to further separate laterally by being forced apart by the anchoringmember I l is efiectively resisted by the encircling portions of the bushing Hi.

In addition to serving as an anchoring-member, the part i l serves during the molding of the bushing H) or its equivalent, to hold the desired portions of the electric conductors l2 and I3 apart, to thus permit the entrance of the material being molded into the voids between the parts H, M and I5.

In Fig. 5, the anchoring-member H has been omitted from between the laterally-spaced-apart portions of the electric conductors l2 and [3, with the result that when the bushing ID or its equivalent is molded around the said laterallyspread-apart portions, an anchoring-web [9 will be formed which is integral with the remainder of the bushing 19 and which will eifectively anchor the electric conductors l2 and 13 against or) axial movement relative to the bushing H) or its equivalent.

The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equ valency range of the appended claims are intended to be embraced therein.

I claim:

1. In combination, a molded bushing comprising a body-portion having a pair of sinuous conductor passages extending longitudinally therethe opposite ends thereof being spaced apart laterally to form a substantially-solid web therebetween within the body of said bushing; and a pair of insulated electric conductors molded in situ in said sinuous passages, each insulated conductor being of a diameter to make continuous peripheral engagement with the walls of its respective passage so as to bind with the walls of said web when said insulated conductors are pulled in the direction of their longitudinal axes, whereby said insulated conductors are anchored in said passages against axial displacement with respect to said bushing.

2. In combination, a molded bushing comprising a body-portion having a pair of sinuous conductor passages extending longitudinally therethrough, the corresponding ends of said pair of sinuous passages intersecting at opposite ends respectively of said bushing and the respective portions of said sinuous passages intermediate the opposite ends thereof being spaced apart laterally to form a web therebetween within the body of said bushing, a pair of insulated electric conductors molded in situ in said sinuous passages, each insulated conductor being of a diameter to make continuous peripheral engagement with the walls of its respective passage so as to bind with the walls of said web when said insulated conductors are pulled in the direction of their longitudinal axes; and an indurated-member molded in situ in said web between the laterally spaced portions of said sinuous passages to hold the outer walls of said web spaced apart laterally, whereby said insulated conductors are anchored in said passages against axial displacement with respect to said bushing.

3. In combination, a molded bushing comprising a body-portion having a pair of sinuous conductor passages extending longitudinally therethrough, the corresponding ends of said pair of sinuous passages intersecting at opposite ends respectively of said bushing and the respective portions of said sinuous passages intermediate the opposite ends thereof being spaced apart laterally to form a web therebetween within the body of said bushing, a pair of insulated electric conductors extending continuously through and molded in situ in said sinuous passages, each insulated conductor being of a diameter to make continuous peripheral engagement with the walls of its respective passage so as to bind with the walls of said web when said insulated conductors are pulled in the direction of their longitudinal axes; and an indurated-member molded in situ in said web between the laterally spaced portions of said sinuous passages to hold the outer walls of said web spread apart laterally, whereby said insulated conductors are anchored in said passages against axial displacement with respect to said bushing.

4. In combination, a molded bushing comprising a body-portion having a pair of sinuous conductor passages extending longitudinally therethrough, the corresponding ends of said pair of sinuous passages intersecting at opposite ends respectively of said bushing and the respective portions of said sinuous passages intermediate the opposite ends thereof being spaced apart laterally to form a web therebetween within the body of said bushing, a plural insulated electric conductor molded in situ in said bushing, said plural insulated electric conductor being split longitudinally and spread apart laterally intermediate the opposite intersecting ends of said sinuous passages to provide a single insulated conductor in each passage, each insulated conductor being of a diameter to make continuous peripheral engagement with the walls of its respective passage so as to bind with the walls of said web when said plural insulated conductor is pulled in the direction of its longitudinal axis; and an indurated-member molded in situ in said web between the laterally spaced portions of said sinuous passages to hold the outer walls of said web spread apart laterally, whereby each insulated conductor is anchored in its passage against axial displacement with respect to said bushing.

5. In combination, a molded bushing comprising a body-portion having a pair of sinuous conductor passages extending longitudinally therethrough, the corresponding ends of said pair of sinuous passages intersecting at opposite ends respectively of said bushing and the respective portions of said sinuous passages intermediate the opposite ends thereof being spaced apart laterally to form a web therebetween within the body of said bushing, a plural insulated electric conductor molded in situ in said bushing, said plural insulated electric conductor being split longitudinally and spread apart laterally intermediate the opposite intersecting ends of said sinuous passages to provide a single insulated conductor extending continuously through each of said passages, each insulated conductor being of a diameter to make continuous peripheral engagement with the walls of its respective passage so as to bind with the walls of said Web when said plural insulated conductor is pulled in the direction of its longitudinal axis; and an indurated-member molded in situ in said web between the laterally spaced portions of said sinuous passages to hold the outer walls of said web spread apart laterally, whereby each insulated conductor is anchored in its passage against axial displacement with respect to said bushing.

CARL H. JUDISCI-I.

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

UNITED STATES PATENTS