US1871519A

US1871519A - Insulator suspension yoke

Info

Publication number: US1871519A
Application number: US377237A
Authority: US
Inventors: Kent A Hawley
Original assignee: LOCKE INSULATOR CORP
Current assignee: LOCKE INSULATOR Corp
Priority date: 1929-07-10
Filing date: 1929-07-10
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

Aug. 16, 1932. K, HAWLEY 1,871,519

INSULATOR SUSPENSION YOKE Filed July 10, 1929 Patented Aug. 16, 1932 UNITED STATES v KENT A. HAWLEY, F BALTIMORE, MARYLAND, ASSIGNOR TO LQCKE INSULATOR COR- PORA'I'ION, 0F BALTIMORE, MARYLAND, A CORPORATION OF MARYLAND,

INSULA'IOR SUSPENSION YOKE Application filed July 10,

The invention relates to suspension yokes for a plurality of strings or chains of insulators used for supporting high tension transmission lines.

1 It is well known in the art that it is a common practice to make use of a plurality of tered owing to the fact that when onestring of insulators breaks a severe cantilever or twisting strain will come upon the suspension elements which connect the upper and lower ends of the string of insulators to the yoke arms, This is naturally a serious disadvan tage and it is to remedy this condition that I have devised the present invention which has for its general object the provision of a suspension yoke and connections between the I 2 same and the insulator strings of such charactor as to avoid the brlnglng of any heavy twlstmg or other s1m1lar strams upon the parts, the arrangement being such that the yokes at the 'top and bottom of the strings may move and accommodate themselves to a new line of pull so that the load will be at least substantially equalized and danger of breaking any of the apparatus avoided.-

An important object of the invention is to provide a suspension yoke structure which may include counterpart members at the top I and bottom of the strings of insulators so that only one type of yoke will be necessary to effect installation.

Another object of the invention is to provide a suspension yoke device and insulator connections or suspension elements engaged therewith which may, be very quickly and will be positively maintained in place against accidental detachment while capable of hav- 7 ing free movement to bring about equalization of strains. s

An additional object is to provide a device or structure of this character which will be easily applied and which after application I g gaged with n a hole V16 111- the hub portion 1929. Serial no. 377,237.

simple and inexpensive to make,easy to install,positive in action, eflicient and'durable in service, and a general improvementin the art; e

To the attainment of the foregoing and other objects and advantages, the invention preferably consists in thedetails of construction and the arrangement and combination of parts to be hereinafter more fully described and claimed, and illustrated in the"accom- The upper yoke A is intended to be suspended Om a support, as by means of a clevis D or the like while the lower yokej B is intended to 'carry a conductor holding clamp. or the like, notshown. In the present instance there are three strings of insulators in the installation and it is for use in connection with such that fmy yoke is specially designed. Naturally it is immaterial how the top yoke is suspended and likewise makes no difference In carrying out the invention I form the yoke A or B as a hub'member 10 from which to make the device by casting. The suspension means is represented asicompri'sing an eye bolt l'having its sha'nk15 rotatably enor memberWlO, theextremity of the shank being threaded and carrying a nut 17 which is .preferably cottered at 18 to prevent detachment; At the base of the shank 15 the eye-bolt is disclosed" as having an angular what type of conductor clamp is used as such details vary in diflerent installations.

fill

vof the lowermost insulators.

lower yoke B is inverted with respect to the. upper one. The drawing shows the strings The means for mounting the strings of in sulators is here shown as comprising elongated loops 21 of substantially elliptical shape, these loops being swingably engaged upon the hooks 12 and being shown as .en-

gaged within the clevises of ball head mem-' bers 22 connected with the caps'of the u-ppermost insulators and within the clevises of socket members 22' connected with the pins Of course the as broken away as they are naturally of indeterminate length depending .upon the voltage carried in the transmissionlines. To prevent the links 21 from disengagement from the hooks 12, I may provide pins :23 passing through the-bight portions of the hooks and extending partly across the open portions,

cotters 24 being provided for preventing v claims hereunto appended.

withdrawal of the pins.

In the use .of the yoke, it is apparent that theyare arranged in opposed relation and connected with the strings .of insulators as shown, the uppermost yoke being suspended from a tower or other support and the lowermost one carrying a suitable .clampfor holding the conductor. Under ordinary conditions the strain isdivided between the three strings of insulators.

In the event that one .of the strings should break, possibly as the resultof .a mechanical defect in a :casting or the cement which holds the hardware, or .as

the result of an arc burning away the hardware at an intermediate point, the load will then he sustained by the other two strings. .However, when such a contingency occurs it is clear that the yokes will move out of their initial or normal positions as the parts of the installation .must accommodate themselves to the line of strain. With the ordinary type of yoke having .clevis connections with the insulator strings severe twisting strains and bending strains are set up in the connections. However, with this form of yoke and owing to the suspension :of the insulator strings by parts. "movement as it is apparent that the loops can swing freely and also move laterally to "a limited extent with respect tothe hooks 12 and as the insulator strings can swing freely upon the links. There is an additional feameans of the elongated loops all of the parts can turn, twist or move into different lines without bringing dangerous strains upon and over-taxing the mechanical strength of .the This is all due to the freedom of ture of advantage and that is that the plane in which all the hooks lie is spaced considerably below the connection of the suspension eye bolt 14: with the yoke. This reduces the cantilever strains which come upon the equipment in the eventof breakage or other letting go of one of the strings.

From the foregoing description and a study of the drawing it will be apparent that I have thus provided a very s mple and inexpensive yoke structure by means of Which the maximum efliciency in point of equaliza "tion and other features is obtained. Instalas the right is reserved to make all such changes in the details of construction as will widen the field of utility and increase the adaptability of the device provided such changes constitute no departure from the spirit of the invention or the scope of the Having thus described the invention, I claim: I

1. A yoke for supporting a plural ty of strings of insulators, comprising a hub member provided with suspension means and. having a series of inclined diverging arms radiating therefrom and terminating in hooks, horizontal brace elements connecting the intermediate portions of the successive arms and means swingably engaged upon the hooks and adapted for connection with the ends of the insulator strings.

2. A yoke for supporting a plurality of strings of insulators, comprising a hub member provided with suspension means and havingaseries of inclined diverging arms radiating therefrom and terminating in hooks, elongated links swing'ably engaged upon the hooks and adapted for connection with the ends of the insulator strings, and means partly traversing the open portions of the hooks beyond the links for preventing detachment of the latter.

3. A yoke for supporting a plurality of ber provided with suspension means and having a series of inclined diverging arms radiatmg therefrom and terminating in hooks,

elongated links swingably engaged upon the hooks and adapted for connection with the ends of 'theinsulator strings, and pins extending through the hooks and partially obstructing the open portions thereof for preventing withdrawal of the links.

4. A yoke for supporting a plurality of strings of insulators, comprising a hub member having a series of inclined arms radiating therefrom and terminating in upwardly directed portions defining hooks, brace elements extending between and merging into the successive arms, and elongated links swingably engaged upon said hooks for connection with the ends of the insulator strings.

5. A yoke for supporting a plurality of strings of insulators, comprising a hub member having a series of inclined arms radiating therefrom and terminating in upwardly directed portions defining hooks, brace elements extending between and merging into the successive arms, and elongated links swingably engaged upon said hooks for connection with the ends of the insulator strings, said suspension member comprising an eye bolt having its shank passing through said hub member.

6. A yoke for supporting a plurality of strings of insulators, comprising a hub member having a series of inclined arms radiating therefrom and terminating in upwardly directed portions defining hooks, brace elements extending between and merging into,

the successive arms, and elongated links swingably engaged upon said hooks for connection with the ends of the insulator strings, said suspension member comprising an eye bolt having its shank passing through said hub member, the bolt having angular portions and the hub member having spaced lugs located outwardly of said angular portions for limiting rotation of the bolt with respect to the yoke.

In testimony whereof I afiix mysignature.

KENT A. HAWLEY.