US1306670A - Insulating-support - Google Patents

Description

S. H. LANYON.

INSULATING SUPPORT.

APPLICATION FILED JUNE I2 1910.

1,306,670. Patented June 10, 1919.

ATTY

SAMUEL H. LAN'YON, OF OAKLAND, CALIFORNIA.

IN SULATIN G-SUPPORT.

Application filed June 12, 1916. Serial No. 103,144.

To all whom it mag concern Be it known that I SAMUEL H. LANYoN, a

subject of the King of Great Britain, re-

ments in insulating supports for electrical conductors.

The insulating portions of these supports, which are generally made of porcelain, are at present generally cemented to the metal portions. But, owing to the coe'flicients of thermal expansion of the insulating material and metal being unequal, minute cracks are formed in the insulatin material, and when said cracks become lled with water, the efiiciency of the insulator is completely destroyed.-

It is the object of the present invention to provide an insulating support which will not depend upon cement as the means of connection between the metal and porcelain parts, and which will allow of expansion and contraction without injury to the support.

In the accompanying drawing, Figure 1 is a broken side view of one form of my improved insulating support; Figs. 2 and 3 are cross-sectional views on the llnes 22 and 3-3 respectively of Fig. 1; Fig. 4 is a broken vertical sectional view of a modification; Fig. 5 is a view, of a further modification.

Referring to the drawing, 1 indicates a similar to Fig. 4.,

hanger, in general of the usual form, formed integral with a cap 2. 3 indicates a porcelain shell, in general of the usual form, and 4 a drop-forged eye-pin, the head 5 of which is received within a cavity 6 To secure the porcelain shell 3 to the cap 2 I form the cap and the upper portion or head 7 of said shell each with one ormore' grooves 8, said circumferential circular grooves being approximately semi-circular in cross section and the grooves of the cap registering with those of the shell, forming circular channels. The cap 2 is formed with holes 9 by which access can be had from the outside to the respective channels. Retainers, ascoils 10 of spring brass wire,'are

of said shell.'

inserted in a tangential direction through said holes 9 and are pushed inwardly throughout the entire nels, completely filling the same. A lug 11 on the cap, on the outer side of the hole at which the coil enters, is then bent inward to retain the coil in place.

To attach the eye-pin to the porcelain shell there are formed in the wall 12 of the cavity of the shell and in the surface of the head 5 of the eye-pin registering conical helical grooves 14, 15 forming a conical helical channel, and a coil 16 of spring wire is inserted between the eye-pin and the porcelain shell and moved in the conical helical channel formed by the two grooves until said channel is completely filled. Said channel, at its narrow end, is extended through the eye-pin in a straight line, as shown at 17, the better to retain the coil in place.

A modification of this mode of attaching the eye-pin to the porcelain shell is shown in Fig. 4:, in which there are formed in the inner surface of the cavity of the porcelain shell circumferential circular grooves 18, ap-

proximately semi-circular in cross-section, in which are received coils 19 of spring brass Wire, approximately one-half of said coil being contained in said grooves 18 and approximately one-half lying outside the grooves. A soft copper thimble 20, of nearly the same dimensions as the cavity, is then inserted therein and is spun or rolled so as to form in its outer surface circumferential grooves 21 approximately semi-circular in cross section, in which are contained the inner portions of the coils 19. The portions of said thimble not so grooved lie close to the inner wallof the cavity. The eyepin 22 is formed with circumferential ribs 23, and the parts are of such dimensions that when in position the surface of the eyepin is spaced from the interior surface of the thimble. into the space bGtWGGIbthG eye-pin and the thimble. When the lead cools the device is ready for use.

In the form of the invention shown in Molten lead 24 is then poured Specification of Letters Patent. Patgnted June 10, 1919.

length of the chan- Fig. 5, the eye-pin, as in the other modifications, is of a general conical form, and has somewhat deep circumferential circular grooves 25. The cavity in the porcelain shell is also of conical form and has shallower circumferential circular grooves 26. Compressed spring metal wire rings 27 in said grooves are interposed between the shell and the eye-pin. Q

The grooves 26 in the porcelain shell are each formed with a lower wall 28 extending almost horizontally and preventing the dropping of the compressed spring wires, and, if said spring wires are released from pressure between the surfaces of the porcelain shell and eye-pin, they immediately expanel, and, if possible, assume higher positions in the grooves in the porcelain shell.

ll claim 1. In an insulating-support, an insulating shell having a circumferential groove, a metal portion of the insulating support having a registering groove, the two grooves forming a channel, and a coil of spring wire in said channel. 2. In an insulating support, an insulating shell, a metallic cap, said shell and cap .having registering circumferential grooves eoaero 4. In an'insulating. support, an insulating shell, a metallic cap, said shell and cap having registering circumferential grooves forming a channel, and a horizontal coil of vertically coiled wire in said channel, the cap having an opening into said channel from the outside to permit said flexible wire to be inserted.

5. In an insulating support, an insulating shell, a metallic cap, said 'shell and cap having registering circumferential grooves forming a channel, and a coiled spring in said channel, thecap having an opening into said channel from the outside to permit said flexible wire "to be inserted.

SAMUEL H. LANYoN;

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