US1871350A - Suspension clamp - Google Patents

Description

Aug 9, 1932.

N. A. WAHLBERG SUSPENSION CL-AMP Filed Aug. 29, 1927 2 Sheets-Sheet I INVENTOR /V 75 H h/ah lerg.

' 'ATTORNEY 2 Sheets-Sheet 2 v INVENTOR MZfi/ h/ah/berg.

/ AT'ORNEY Aug. 9, 1932. N. A. WAHLBERG SUSPENSION CLAMP Filed Aug. 29, 1927 Patented Aug. 9, 1932 j warren stars PATENT Fl N ILS A. WAHLBERG, OI WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTI N ELECTRIC 65 MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA SUSPENSION CLAMP Application filed August 29, 1927. Serial No. 216,144.

My invention relates to suspension clamps andparticularly to clamps for supporting high-voltage transmission-line conductors.

One object of my invention is to provide a device of the above-indicated characterthat shall reduce the fatigue efiects occurring in conductors adjacent to the points of suspension thereof to thereby reduce the likelihood of breakage of the conductors at these. points.

Another object of my invention is to provide a suspension clamp that shall securely hold the conductor, that shall be easy to install and that shall be neat and compact in appearance.

Another object of my invention is to provide a suspension clamp in which cooperating clamping members, as one unit, and a suspension structure, as another unit, shall have substantially universal relative movement to reduce damaging forces in the conductor, in the clamp and in the adjacent insulator and supporting tower or other main supporting parts with which the clamp is associated.

A further object of my invention is to provide a suspension clamp that shall be simple and durable in construction, economi cal to manufacture and eidective in its operation.

In high-voltage transmission-line practice, the conductors are subject to fatigue, sometimes referred to as crystallization, at the positions where they are fixed by the clamps.

It is my aim to reduce fatigue in the conductors at the clamping positions and to provide a clamp for th s purpose that shall have other features of advantages and economy and be an improvement, in general, over clamps heretofore employed.

Accordingly, in practicing my invention, I provide a suspension clamp embodying clamping and suspension elements that are so disposed in disconnected supporting relation and in lost-motion connecting relation about a center of relative movement adjacent to a center of movement of the conductor as to reduce fatigue of the conductor and to provide a clamp that has other features of advantage.

Figure 1 of the accompanying drawings is a side elevations-.1 view of a clamp constructed in accordance with my invention,

Fig. 2 is a sectional view takensubstantially along the line HII of Fig. 1,

Fig. 3 is a view, similar to Fig. .1, of a modified form of my invention, 7

Fig. 4 is a sectional view taken substantially along the line IV-IV of Fig. 3,

Fig. 5 is a view, similar to Figs. 1 and 3, of a it'lurther modified form of my invention, anc

Fig. 6 is a section view taken substantially along the line VIVI of Fig. 5.

Referring to Figs. 1 and 2, a conductorreceiving channel. member 2, for supporting a conductor 3, comprises a lower seat portion 4:, verticallyextending side portions 6 and apertured side bosses 7 A clampin g-shoe member 9,v for disposition over the conductor 3 in the channel 2, has a slightly grooved under surface 10 and seat portions 12 for the reception of U or J-bolts 14 which extend through the bosses and are held in position, as by nuts 15 and lock washers 16. v

A suspension structure, for the cooperating clamping members 2 and 9, comprises side members 18 which, with a lower bolt or pin element 19, constitute substantially a yoke-in which the members 2 and 9 are suspended, the pin 19 cooperating with the seat portion 4 of the channel member 2, whereby the channel member may pivot about the axis of the pin 19- in relatively close proximity to the longitudinal axis of the conductor 3.

The vertical projections 6 of the channel member 2 are provided with arcuate slots 21, about the axis of the pin 19, in which a second pin 22 is disposed. The pin 22 connects the side members 18 and is supported by a clevis or other suitable mounting member,

24 for attachment, as by a pin 25, to a suspension insulator. T

In the above-described structure, the clamping members 2 and 9 are supported in disconnected relation to the pin 19 and connected. in lost-motion relation to the pin 22, by means of the slots 21.

In operation, oscillations of the line conductor 3, by reason of the lost-motion connection, above described, permit the clamping parts 2 and 9 to oscillate freely with the conductor without transmitting violent vibration forces to the clevis member 24.- and to its adjacent connected parts, such as the insulator and supporting tower. The constructionand relation of parts are also such as to render them of ready and economical manufacture and easy assembly.

In Figs. 3, 4, 5 and 6, corresponding parts are designated by corresponding reference characters.

Referring to Figs. 3 and 4, the structure is substantially the same as that above described, with the exception that, instead of being pivotally mounted to rock on the pin 19, as in Figs. 1 and 2, the channel member 2 and its associated fixedly related parts are adapted for limited substantially universal movement relative to the suspension structure. To eifect this movement, the seat portion 4 of the channel member 2 is modified to accommodate a seat member 27 on the pin 19, the portions 6 and 18 are disposed in spaced relation to each other and the portions 6 are also disposed in spaced relation to the clevis member 2& whereby, with the slots 21 of suitable width, the member 2 and its associated parts are permitted a certain amount of lateral movement in addition to the rocking movement about the axis of the pin 19.

In the form of my invention shown in Figs 5 and 6, the structure'is similar to that of Figs. 3 and 4, with the exception that the seat elements 4 and 27, instead of being in direct engagement with each other, cooperate through a ball or other suitable bearing member 28 to permit the above-mentioned limited universal relative movement between the clamping and suspension elements.

While I have shown and described particular forms 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:

1. A clamp comprising a suspension member having a seat, co-operating clamping members disposed on said seat, one of said members having a co-operating portion for position on said seat and one of said members having a slot shaped in accordance with rocking movement of the clamping members on the suspension seat to provide a lostmotion connection to said suspension member, said suspension member being connected to the clamping members only through said slot. f I 2. A suspension clamp comprising a conductor-receiving channel member having an under-side seat and vertical-side projections having registering arcuate slots about a transbers, a member connected between the lower ends of said side members and co-operating with said seat, a member between the upper ends of said side members for mounting the clamp and connecting means extending be tween said side and mounting members through said slots;

3. A suspension clamp comprising a conductor-receiving channel member having an under-side recess and vertical-side projections having registering arcuate slots above said recess about an axis transverse to the channel of said member adjacent to said recess, means for clamping the conductor in the channel, and a suspension structure embodying side members in laterally spaced relation to said projections, a member supported between the lower ends of said side members and disposed in said recess, a member between the upper ends of said side members in spaced relation thereto for mounting the clamp and connecting means extending between said side and mounting members through said slots.

In testimony whereof, I have hereunto subscribed my name this 24th day of August,

- NILS A. WAHLBERG.

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