US1901860A - Transmission line - Google Patents

Description

' A. O. AUSTIN TRANSMISSION LINE March 21', 1933.

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PatentedJy Mar. 21, 1933 UNITED STATES PATENT OFFICE ARTHUR O. AUSTIN, OF NEAR BARBERTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE OHIO BRASS COMPANY, OF MANSFIELD, OHIO, A CORPORATION OF NEW JERSEY Original application filed April 2, 1928, Serial No. 266,584, Patent No. 1,773,659, August 19, 1930. Divided and this application filed July 18, 1930. Serial No. 468,970.

This invention relates to electrical transmission lines, and has for one of its objects the provision of means for reducing vibrations in supported strands or conduct-ors.

A further object is to provide a combined damping device and flux control to damp vibrations in the line without increasing the tendency toward electrical discharge from the line.

A further object is to provide a device of the class named which shall be of improved construction and operation.

Other objects and advantages will appear from the following description.

The invention is exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification, and it is more particularly pointed out in the appended claims.

In the drawing:

Fig. 1 is a vertical, sectional view of one form of the present invention applied to a transmission line.

Fig. 2 is a transverse section on line 2-2 of Fig. 1.

This application is a division of application Serial Number 266,584, filed April 2, 1928, Which has resulted in Patent No. .1,773,- 659 dated August 19, 1930.

In building high voltage transmission lines, it is desirable to string the conductors at a high mechanical tension so that the nuinber of supports may be reduced and ample ground clearance provided. It is also desirable to maintain sufficient tension in the conductor so that danger of the conductors swinging together Will be less for a given spacing or separation. As the tension increases, trouble from vibration, which tends to destroy the conductor or attachments. seems to increase. The tension, mass and size of the conductor are apparently factors in setting up this vibration. In some cases, the conductor has been seriously damaged in a comparatively` short time due to this vibration. The vibration, in general, is in a vertical direction and is apparently caused by the action of wind upon the conductor.

The amount of energy maintaining the vibration is usually very small. Therefore, any slight absorption of energy produced by the oscillation or vibration of the conductor will suffice to dampen it out or maintain it Within safe bounds. While it is possible that a change of mass in the conductor may change the oscillation materially, the only sure means of limiting an oscillation .is through an absorption of energy, producing the oscillation. If, therefore, any attachment having suitable mass is applied to the conductor so that the oscillation of the conductor will tend to cause a movement with respect to this mass so that energy'will be dissipated, the oscillation may be kept Within safe bounds or elimmated. In general, it is advisable to apply the oscillation or vibration absorber in the vicinity of the insulator or tower.

Where this is done, however, any change in the size of the conductor usually results in a much lower flashover voltage due to concentration of electrostatic stress upon the projecting parts. In my present invention, means is provided not only to absorb energy due to vibration but also to prevent the vibration damper from lowering the flashover voltage.

In the form of the invention illustrated in the drawings. a single sleeve 10 is secured to the conductor 11 and a bracket 12 is suspended fiom the sleeve 10 and is free to rotate about the axis of the conductor. Arms 13 are pivotally mounted on a pin 14 carried by the bracket 12. The arms 13 are provided with friction discs 15 which resist pivotal movement of the arms about the pin 14. Springs 16 secured to the brackets 12 support the arms so that the arms are poised in an extended position and free to move about the pin 14 except for the frictional resistance offered by the discs 15. Weights 17 are carried on the ends ofthe arms 13 and the inertia of these Weights tends to hold the arms 13 stationary when the conductor 11 is vibra-ted vertically. The weights 17 are preferably made of dielectric material such as porcelain and completely cover the ends of the arms 13 so that the arms 13 and weights 17 constitute insulated iux control members similar to controls is explained in the patent referred to above. When the conductor 11 vibrates vertically, the inertia of the weights 17 will `cause relative movement of the arms 13 about their pivots so that the friction between the discs 15 will absorb the energy of vibration and thus damp out the vibrations of the conductor. Since the vibration damper is supported\entirely by the conductor 11, it is apparent that the damper may be located at any desirable position along the line. The friction between the discs 15 may be adjusted by a nut 18 on the bolt 14 and a spring washer 19 interposed between the nut and the bracket plate 12.

I claim:

1. The combination with a transmission line, of a weighted arm pivotally mounted on said line, and friction discs located at the pivoted end of said arm for absorbing energy tending to produce movement of said arm upon its pivot.

2. The combination with a transmission line, of a pivotally mounted arm carried by said line, a mass supported by said arm, a spring for floating said arm to move relative to said line, and frictional means for absorbing energy when said line and arm are moved 'relative to each other.

3. The combination with a transmission line, of a sleeve fixed to said line and supported thereby, a bracket journaled on said sleeve and rotatable about an axis extending in the direction of said line and arranged to hang downwardly from said line, a mass mounted on said bracket and movable relativethereto, and means for dissipating the energy of movement of said bracket and line.

4. The combination with a transmission line, of a sleeve iixed to said line and supported thereby, a bracket journaled on said sleeve and rotatable thereabout the axis of said line and arranged to hang downwardly line, of a bearing sleeve fixed to said line, a bracket suspended from said bearing sleeve, a pair of arms pivotally mounted on said bracket and extending therefrom in the direction of the length of said line, weights mountedon the ends of said arms, springs for holding said weights in ioated relation to said bracket, and adjustable friction means for dissipating energy of movement of said arms on said pivot. e

7. The combination with a transmission line, ofweighted spring-supported arms having frictional engagement with each other arranged to be moved by vibration of said line to absorb energyof vibration of said line.

8. The combination with a transmission` line, of an arm pivotally mounted on said line.

frictional means for dissipating energy of pivotal movement of said line, and a dielectric member disposed about the end of said arm to increase the inertia of said arm and to prevent electrical discharge therefrom.

10. The combination with a transmission line, of a sleeve fixed to said line, a bracket carried by said sleeve to swing about the axis of said line, a pair of oppositely extending arms pivotally mounted on said bracket and having friction discs at the ends thereof for dissipating energy when said arms are moved upon their pivotal axis, resilient means supporting said arms and insulators disposed over the ends of said arms for increasing the inertia of said arms and for preventing electrical discharge therefrom.

In testimony whereof I have signed my name to this specification this 16th day of July A. D. 1930.

ARTHUR O. AUSTIN.

from said line, a weighted arm pivotally mounted on said bracket, and friction means actuated by the pivotal movement of said arm to absorb energy of vibration of said line. V

5. The combination with a transmission line, of a bracket suspended from said line and free to move about the axis of said line, an arm pivotally mounted on said bracket, a mass carried by said arm, a support for yieldinglT suspending said arm and mass but permitting movement thereof about the pivotal support for said arm, and frictional means for dissipating the energy of the pivotalmovement of said arm on said bracket.

6,'The combination with a transmission

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