US1870790A - Connecter - Google Patents

Description

v 9, 1932- G. M. BARROW 1,870,790

CONNECTER Filed Jan. 22. 1931 E U /Z'-f 8 ./Z

WITNESSESI 'NVENTOR m firm. George M Barrow LMW M ATTORNEY Patented Aug. 9, 1932 UNITED STATES PATENT OFFICE enoaen M. BARBOW, or DERBY, PENNSYLVANIA, ASSIGNOR 'ro WESTINGHOUSEELEC- TRIO & MANUFACTURING COMPANY, A. CORPORATION OF PENNSYLVANIA CONN ECTER Application filed January 22, 1931. Serial No. 510,451.

My invention relates to connecters and particularly to means for connecting highvoltage suspension insulator units.

An object of my invention is to reduce corona formation in high-voltage insulators.

Another object of my invention is to provide a combined load-resisting'and connecter-elementpositioning means for an insulator.

Another object of-my invention is to provide a clevis structure, the cooperating pin for which may be inserted-from, and held in predetermined position at, either side of the clevis.

Another object of my invention is to provide a pin-and-clevis structure that shall ensure assembly of the parts thereof only in a predetermined relation.

Another object of my invention is to provide pin-and-clevis elements for predetermined relation to each other that shall be interchangeable with clevises and pins, respectively, that are not so adapted.

A further object of my invention is to provide a device of the above-indicated character that shall be simple and durable in construction, economical to manufacture and effective in its operation.

In high-voltage suspension insulators of the cap-and-pin type embodying eyes and clevises for connecting the series-related units thereof, it is customary toemploy cotters or, as more commonly called, cotter-pins for preventing the withdrawal of the main connecting pins that connect the eyes and clevises between the units. The cotter, in the form of a return-bent wire, has a rounded head or loop at one end. The free ends of the two-part shank are adapted to be spread apart, after insertion of the cotter through a transverse or radial opening in the main or connecting pin.

Since the main pins have plain cylindrical shanks, in the structures of the usual type,

the cotters may assume any angular position about theatres of the main. pins, either at the time of insertion or afterwards, as a result of vibration of the structure.

When the bipartite cotter shanks assume a vertical position or a position in the direcears at right angles The tangent plane shoulder surfaces may be tion of the insulator axis, since the free ends thereof are relatively sharp and directly in the strong electrostatic field of the insulator,

they initiate corona which charges the atmosphere immediately adjacent to the insulator and causes ultimate breakdown before it would otherwise occur.

It is my aim to-overcome the above-mentioned objection in a manner in which I have found the flashover characteristics of an in- 6b sulator to be substantially improved and, accordingly, in practicing my invention, I construct the clevis and the pin so that they and,

consequently the cotter, may each assume but one position in which the electrostatic field isleast disturbed. v

Figure 1, of the accompanying drawing, is a side view, partially in elevation and par tially in section, of an insulator structure embodying my invention, and

Figs. 2 and 3 are similar views at right angles to Fig. 1, of opposite sides of a portion of the structure shown in that figure.

The insulator proper, constituting no'part of my present invention aside from its gen eral cooperation with the parts thereof, is ofa usual type, comprising a metal cap 2, a dielectric member 1 and a metal pin 6.

The closedor transverse end-wall 8 of the cap 2 constitutes a base to which are preferably integrally united clevis ears 10 extending in the direction of the insulator load axis. Elements 12, also preferably integrallyunited to the wall 8 and to the cars 10, reinforce the base ends of the ears and have preferably plane surfaces substantially tangent to' the cylindrical openings in the clevis to the insulator axis.

at other angles, disposed farther away from the clevis openings and the parts otherwise shaped andrelated. Also, one of the elements 12 may be omitted.

A connecter pin comprises a preferably 7y cylindrical shank portion 14: having an opening for the reception of a cotter 16, adjacent to one end, and a flange or head portion. 18 at its other end. The head 18, for the greater portion of 7 its perimeter, is greater in radlus than the distance from the axis of 1G9 the clevis apertures to the plane surfaces of the elements 12, but has a plane transverse surface of slightly less than this distance which may be placed over, or in register with, the plane surfaces of one of the elements 12. The opening in the shank 14 for the cotter 16 is, in this instance, parallel to the abovementioned plane surfaces, in the operative position of the parts. The cotter, in such position, is transverse to the longitudinal axis of the insulator and both ends of the cotter are in a mid-position farther removed from the next adjacent upper insulator unit than they would be in the vertical or longitudinal position of the cotter. The electrostatic field of a series of such insulators is usually stronger just beneath its units and it is the ends of the cotter, particularly the free or spread ends 20 thereof, which disturb this field.

By the construction, the elements 12 reenforce the ears 10, the shank 14: may be placed in the clevis from either side but may not be so placed except in proper position, and the cotter 16 is initially placed, and maintained, in its most advantageous position both for its reception into the shank 14 and for offering minimum disturbance to the field.

The pin 14 may be employed as an ordinary pin in other devices and an ordinary pin may also, beemployed in the clevis for supporting the insulator in emergency.

anddescribed a par- While I have shown tioular form of my invention, changes may be effected therein without departing from the spirit and scope thereof, as set. forth in the appended claims.

I claim as my invention:

7 1. In combination, a member having an aperture therethrough and a shoulder at one side adjacent, to said aperture, and a pin in said aperture having a head at said side and an opening at the other side of said member, said head having a shoulder cooperating with said first shoulder to maintain a cotter in said opening in predetermined position.

2. In combination, a member having an aperture therethrough and shoulders disposed one at each side of the member adjacent to said aperture, and a pin for insertion in either direction through said aperture having a head at one side and an opening at the other side of said member, said head having a shoulder for cooperation with either of said first shoulders to maintain a cotter in said opening in predetermined position.

3. In combination, a clevis having shoulders associated one with each ear thereof, and a pin for insertion in either direction through the clevis having a head at one side and an opening at the other side thereof, said head having a shoulder for cooperation with either of said first shoulders to maintain a cotter in said opening in predetermined position.

4. In combination, an insulator including a member having an aperture therethrough transverse to the insulator axis and a shoulder at one side adjacent to said aperture, and a pin in said aperture having a head at one side of said member and an opening at the other side thereof transverse to said axis and to the axis of the pin, said head having a shoulder cooperating with said first shoulder to maintain a cotter in said opening in predetermined electrical relation to the insulator.

5. In combination, a suspension insulator including a cap, a clevis on the cap and a shoulder adjacent to one side of the clevis, and a pin in the clevis having a head at one side and an opening at the other side thereof,

said head having a shoulder cooperating with,

said first shoulder to maintain a cotter in said opening in position transverse to the insulator axis.

6. In combination, a suspension insulator including a cap having an integral clevis and an integral shoulder, said shoulder having a plane surface, and a pin in the clevis having a head at one side and an opening at the other side thereof, said head having a plane surface cooperating with the plane surface of said shoulder to hold a cotter in said opening at substantially right angles to the in sulator axis.

7. In combination, a suspension insulator including a metal cap of substantially cupshape having an integral clevis on the closed end of the cap and integral shoulders associated one with the outside of each ear of the clevis, said shoulders extending between theapertures in the clevis and the closedend wall of the cap and having plane surfaces at substantially right angles to the insulator axis next to said apertures, and a cylindrical pin substantially filling said apertures having a head portion at one side of apertures and a radial through opening at the other side of the clevis, said head having a transverse plane surface parallel to said through opening for adjacent parallelplane relation to one of said first plane surfaces to maintain a cotter in said through opening at substantially right angles to said axis.

8. In combination, a suspension insulator including a cap having an integral clevis and an integral shoulder, said shoulder having a plane surface transverse to the pin apertures'in the clevis adjacent to one of said apertures at one side of the clevis, and a pin in the clevis having a head at said side and an opening at the other side of the clevis, said head being in the form of a lateral flange extending a greater distance from the axis of v the clevis preventing its passage through said said opening than said shoulder surface and having e plane surface for disposition over said shoulder surface in an operative position of the pin.

In testimony whereof, I have hereunto subscribed my name this 19th day of January,

GEORGE M. BABROW.

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