US2468035A

US2468035A - Wire retaining device

Info

Publication number: US2468035A
Application number: US596188A
Authority: US
Inventors: Louis W Carroll
Original assignee: International Standard Electric Corp
Current assignee: International Standard Electric Corp
Priority date: 1945-05-28
Filing date: 1945-05-28
Publication date: 1949-04-26
Anticipated expiration: 1966-04-26

Description

April 26, 1949 w. R LL 2,468,035

WIRE RETAINING DEVICE Filed May' 28, 1945 INVENTOR.

Louis W. CARROLL. BY

ATTORNEY Patented Apr. 26, 1949 WIRE RETAINING DEVICE Louis W. Carroll, New York, N. Y., assignor to International Standard Electric Corporation,

New York, N.

Y., a corporation of Delaware Application May 28, 1945, Serial No. 596,188

6 Claims. 3.

This invention relates to the supporting of aerial electrical conductors and has for a principal object to provide an improved supporting or retaining device for attaching the end of the aerial conductor to a support.

Another object of the invention is to provide an inexpensive retaining device which will hold the end of the conductor without the use of tie wires. Another object of the invention is to provide a retaining device for aerial conductors which will permit more efficient and time-saving manipulation of the wires in making the installation.

Still another object of the invention is to pro vide a retaining device for an aerial conductor which may be simply and easily applied to the conductor and which is held in operative relation with the conductor by the weight of the conductor in the span between the points of support.

The invention contemplates the provision of a retainer which, because of its form, provides a snubbing effect which holds the conductor against the strain caused by the weight of the conductor in the span between the points of support.

The retainin device of the invention is particularly adapted for terminating conductors having thermo-plastic insulation which, because of its physical properties, such as its glossy exterior and lack of adhesion, makes the conductor diificult to retain by ordinary methods without damage to its insulating properties.

The retaining device may be constructed of metal or other material having sufiicient structural strength to withstand the strain involved, preference being given to porcelain, glass, or plastic material havin insu ating qualities against electrical current. It may be adapted for use with single or multi-conductor wires by l'ilOCliflcation of the dimensions and contours at the points of contact between the wires and the retaining device.

These and other objects and features of the invention will be better understood from a reading of the following detailed description taken in conjunction with the accompanying drawings in which:

Fig. 1 is a front view of a preferred form of the retaining device of the invention showing the wire in place and also the attaching bail or loop;

Fig. 2 is an end view of the retainin device shown in Fig. l with the wire and bail omitted;

Fig. 3 is a sectional end view of the retaining device/of Fig. 1 taken on the line 3--3 of that figure but with the wire and bail omitted;

Fig. 4 is a bottomv view of the retaining device of Fig. 1 with the wire and bail omitted;

Fig. 5 is a plan view of the retaining device with the wire and bail in place; and

Fig. 6 shows the manner in which the retaining device is attached to a wall or other support at the end of the aerial conducting wire.

The retaining device as disclosed in Figures 1 to 5 .comprises a fiat block I, about twice as long as it is wide, of sufficient thickness to give the required strength to withstand the strains involved. On one side and adjacent to one end is an integral pulley-shaped portion 2 having a groove 3 of sufficient width and depth to accommodate one or more turns of the conductor to be supported. On the same side of the block I and near the center of the block is an oval-shaped integral snubbing portion 4, the upper and lower ends of which are flush with the upper and lower edges of the block 6 and the lower end of which is provided with a groove 5 of sufficient width, and depth to accommodate the conductor to be supported.

On the same side of the block l and near the opposite end of the block to that having the pulley-shaped portion 2 is a second integral pulley-shaped portion ll having a groove l extending completely around it of suihcient width and depth to receive the bail or loop 8 which is used for anchoring the retaining device to a suitable support such as the wall ll shown in Fig. 6. The bail 8 comprises a single elongated loop of heavy wire with the ends joined together, as by spot welding at it). The end ll of the wire of the loop 8 extending towards the block 5 is continued far enough so that it will extend over the top of the oval-shaped snubbing portion As shown, the free portion of the loop 8 is curved about a smaller diameter than that of the groove I of the pulley-shaped portion t and when the bail is snapped over the outer flange of the pulleyshaped member 6 the ball will be retained in the position shown in Fig. 1 except that it is free to rotate about the center of the pulley-shaped portion 6.

In order to attach an aerial conductor l2 to an end support such as the wall 9 the procedure may be as follows:

The aerial conductor !2 is given one turn in a clockwise direction around the pulley-shaped portion 2, the conductor resting in the groove 3. The conductor is then passed under the oval shaped portion 4 where it occupies the groove 5. The bail 8 is then rotated slightly in a clockwise direction from the position shown in Fig. 1 so that the end I! is separated from. the top of the oval-shaped portion 5. That portion or the conductor 52 which passes under the oval-shaped portion A is then moved into the space between the oval-shaped portion i and the pulley-shaped portion 3 and the bail 8 rotated again in a counter-clockwise direction so that the end i i thereof rests upon the top of the oval-shaped portion i, thus closing the space between the oval-shaped portion d and the pulley-shaped portion 6 and holding the wire l2 therein. ihe bail 3 may then be attached to the wall 9 by slipping it over a hook I3 01' by securing it in any other desired manner to the wall. If desired it may be secured to the wall before the wire is attached.

It will be seen from an inspection of Fig. 6 that the weight of the conductor iii will tend to rotate the block l with respect to the bail 9 so that the end i l of the bail is maintained tightly against the top of the ovalshaped portion i so that the slack end of the conductor i2 cannot move out from under the oval-shaped member. The slack end or" the conductor i2 may then pass through a suitable insulator i i to be connected in any desired manner without any of the weight of the main span of the conductor pulling upon it. A similar retaining device could of course be used at the other end of the wire.

t will be seen from the above description that I have provided a simple, inexpensive retaining device for the end of an aerial conductor which may be easily and quickly applied to the conductor and which is secured in position on the conductor by the weight of the conductor itself. The retaining device also permits taking up slack in the wire because the wire may be removed and replaced from around the retaining portion of the retaining device without disconnecting the end of the wire.

I do not intend to limit my invention to the precise details illustrated in the drawings as many modifications may be made which come within the scope of the invention as defined in the appended claims. For example, provisions may be made for more turns around the pulleyshaped member 2 and if desired additional snubbing portions similar to the oval-shaped portion '3 may be employed arranged so that the conductor will pass under the first, over the second, and under the third, etc. pulley-shaped member 2 and snubbing portion l may also be altered to obtain greater holding efiects.

What is claimed is:

1. A retaining device for aerial conductors comprising a block, first and second closely positioned members on one side of said block provided with wire retaining grooves, the grooves of both members being substantially tangential to the same line, said second member having a groove surface curvature about a materially shorter radius than that of said first member, so that a wire wrapped around said first member may be given a sharp reverse bend around a portion of said second ember, means on the opposite side of said second member from said first member to maintain such reverse bend in a wire so bent around said second member, and bail means to anchor said block to a support.

2. A retaining device as defined in claim 1, in i which the means to anchor the block to a support comprises a bail attached to said block, and

The contours of the in which means is provided on said bail for retaining the wire in position on said block when bail is in operative position.

3. A retaining device as defined in claim 1 in w ii the means to anchor the block to a support comprises a bail movably attached to said block and provided with an end portion adapted to contact the second member at a point on the other side of the wire from the block when said bail is in operative position so as to retain the wire between the end portion of said bail and said block, said end portion, when said bail is moved out of operative position with respect to said block, being adapted to move away from second member so as to permit the insertion and removal of a wire about said second member.

4. A retaining device comprising a block, a first member attached to the side of said block adjacent one end thereof and provided with a wire retaining groove extending around said member, a second member attached to the same side of said block adjacent said first member and having e retaining groove thereon with a surface ature about a materially shorter radius than at of said first member and substantially ngential to a line tangent to the curvature of 1e groove on said first member, whereby a wire ray be wrapped around said first member and ubjected to a sharp reverse bend around said econd member, a third member attached to the side of said block as said first and second veise bend in said wire around said second ember, a bail movably attached to said block for anchoring said block to a support, and means on said bail to close the space between said secand third members to retain the wire therein wb en said bail is in operative position and to open I space to permit the insertion and removal oi said wire when said bail is moved out of operative position.

5. A retaining device as defined in claim 4 in which the bail is pivotally mounted on said third mber and the means to close the space comes an extended end of said bail, said bail being mounted so that the weight of the wire tends to hold it in operative position.

6. A retaining device for aerial conductors comprising a block, a first, second and third positioned members on one side of said block, member provided with a wire-retaining groove, the grooves of the first and third members being tangential to the same line, said second member having a groove positioned on its "nderside, said groove being of a shorter radius the grooves in said first and third members,

mcans to retain the wire in reverse bend between second member and the block, and bail means to anchor said block to a support. LOUIS W. CARROLL.

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

UNITED STATES PATENTS Number Name Date 621,661 Harloe et a1 Mar. 21, 1899 929,878 Ranson Aug. 3, 1909 2,138,571 Dehmel Nov. 29, 1938 2,309,971 McLarn Feb. 2, 1943