Selective Mounting Device For In-line Switches

Abstract

The invention provides a mounting for insulator mounted hook-operated in-line air break electric switches whereby the switch can be mounted selectively so that the switch blade swings in a vertical plane or in a plane inclined to the vertical. The mounting comprises a sleeve horizontally mountable on an insulator and having a pair of radial arms-one normal to the axis of the sleeve and the other at an acute angle, preferably about 60.degree. to the axis of the sleeve. The switch supporting clevis which is coplanar with the switch may be secured by a bolt in embracing relation with either of these arms, so that the switch blade will swing in the same plane, vertical or inclined, as the sleeve arm to which the clevis is secured.

Description

The invention relates to electrical switches, particularly to insulator-mounted in-line hook-operated air break switches, and mountings therefor.

2. The Prior Art

In-line hook-operated switches have commonly been mounted on insulators by a clevis in such a way that the switch could only pivot about a horizontal transverse axis whereby the switch blades were swingable only in a vertical plane. While this arrangement would stabilize the switch against rotation about its longitudinal axis and thus facilitate opening and closing it, if switches were arranged in phase-over-phase relation, interference might occur if the blades of the two upper switches were swung directly downward, in the common vertical plane of all three switches.

The invention provides a horizontal or inclined pivot axis for the clevis by which an in-line switch is supported from a pole-mounted insulator whereby the plane through which the switch blade swings between closed and open positions may be fixed vertically or at an angle to the vertical.

FIG. 1 is a side elevation view of a switch provided with a mounting incorporating the invention.

FIG. 2 is a top view of the switch mounting.

FIG. 3 is an isometric view of the selective mounting sleeve.

FIG. 4 is a transverse vertical sectional view through the mounting along lines 4--4 of FIGS. 1 and 2 showing the switch-vertical position.

FIG. 5 is a transverse vertical sectional view along lines 4--4 of FIGS. 1 and 2 showing the switch-inclined position.

FIG. 6 is an environmental view showing three in-line switches in phase-over-phase relation, mounted on a pole in accordance with the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The letter P refers to a line pole, to which is secured a radially extending horizontal insulator 1 by means of mounting bracket 3.

At its outer end, insulator 1 mounts an axially extending horizontal clevis bracket comprising a circular mounting plate 5 fixed to the insulator end and a horizontal arm 7 having its outer extremity 9 bent upwardly and perforated at 11 axially of the insulator to form the outer jaw of a clevis, the inner jaw of which is formed by mounting plate 5. Mounting plate 5 is centrally perforated at 13 in axial alignment with perforations 11 and is internally threaded to receive a bolt 15, which passes through clevis outer jaw 9.

A sleeve 17 is secured within clevis 5, 7, 9 by bolt 15 which passes through the sleeve. In order to accomplish the objectives of the invention, i.e., selective angular positioning of an in-line switch, indicated generally at 19, sleeve 17 is formed intermediate its ends with a pair of platelike arms 21 and 23 spaced apart longitudinally of the sleeve and extending radially in the same direction from sleeve 17. The general plane of arm 21 is perpendicular to the sleeve axis, and the general plane of arm 23 makes an angle preferably in the order of 60.degree. with the sleeve axis.

Each of arms 21 and 23 is formed with a hole 25 in its outer end portions to receive a bolt 27 for securing switch mounting clevis bar 29.

Clevis bar 29 is a flat elongated bar slotted intermediate its ends at 31 to receive sleeve arm 21 or 23 depending on the desired position of switch 19. At one end bar 29 is formed with a hole 34 for attachment of a strain clamp 35 or the like, and at its other end is bifurcated to form clevis jaws 36 formed with aligned holes 37 to receive a pin 39 for securing switch 19 to bar 29.

Switch 19 comprises a strain insulator 41, to the ends of which are rigidly secured short flat aligned bars 43 and 45 terminating respectively in eyes 47 and 49. Eye 47 is received between clevis jaws 35 of bar 29, and is secured therein by pin 39.

Aligned vertically oriented plates 51 and 53 are formed along their upper margins with flanges 55 and 57 secured by bolts 59 to eyebars 43 and 45 respectively, and a switch blade, comprising parallel flat bars 61, is pivotally connected by pin 63 to terminal plate 53 to swing about an axis transverse of plate 53, i.e., in the same plane as plate 53. At its other end, blade 61, 61 is adapted to embrace the lower end of terminal plate 51 which forms the fixed contact of the switch, the blade being held in closed position by a latch 67 pivotally mounted between blade elements 61. The outer or contact end of blade 61, 61 also mounts a loop 69 for receiving the operating hook (not shown) by which the switch blade is swung between the closed horizontal position as illustrated to an open position in which the blade may be vertical.

Eye 45 on the left end of the switch is connected by clevis bar 71 to a strain clamp 73, which is clamped at 75 to the line L.sub.1, thus supporting switch 19 in alignment with the latter. Line L.sub.1 is also clamped at 77 to the top flange of terminal plate 53.

On the right-hand side of the switch, as viewed in FIGS. 1 and 2, line L.sub.2 is secured by clamp 77 to the top flange of terminal plate 51, and, by means of strain clamp 35, to the right-hand end of clevis bar 29.

As described above, clevis bar 29 is mounted on vertical arm 21 of mounting sleeve 17, as shown in FIG. 4, in which it will be seen that blade 61 is swingable vertically from closed position to the open, shown in broken lines.

To permit the switches to be mounted in phase-over-phase relation, as shown schematically in FIG. 6, without interference between the operating hook and the lower lines during operation of blades 61, or the upper lines, clevis bar 29 may be mounted on inclined arm 23 of sleeve 17, as shown in FIG. 5, on the topmost line, and, if desired, sleeve 17 may be secured on the middle line. On the bottom line, clevis bar 29 can, if desired, be mounted on vertical arm 21 so as to provide vertical movement of switch blade 61.

It will be evident that with the mounting sleeve 17 several arrangements of the parts may be effected to avoid interfering vertical swinging movement of the upper switch blades 61.

The invention may be modified in various respects as will occur to those skilled in the art and the exclusive use of all modifications as come within the scope of the appended claims is contemplated.

Claims

1. The combination of a power line stationary support, a bracket thereon, an in-line air break electric switch of the type having an elongated blade pivoted about a transverse axis, and transverse axis means on said switch for connecting said switch to said support with a mounting device positioned transversely of said switch, comprising an elongated element formed with a pair of platelike arms radial with respect to the axis of said element and spaced apart axially thereof, the general plane of one of said arms being perpendicular to the axis of said element and the general plane of the other of said arms being inclined with respect to the axis of said element, said elongated element being secured to said bracket against rotation in its axial plane, said arms being respectively selectively securable to said transverse axis means with the axis of the latter normal

2. The combination according to claim 1 in which said elongated element is

3. The combination according to claim 1 wherein said stationary support

4. The combination according to claim 3 wherein said bracket has spaced jaws defining a clevis carried on the end of said insulator remote from

5. The combination according to claim 4 wherein said elongated element is axially apertured, and an elongated securing element passes through said jaws and the aperture of said element to secure said element within said

6. The combination according to claim 1 including means for selectively securing an in-line switch to one of said arms with the major axis of the switch normal to the axis of said elongated member whereby the switch

7. The combination according to claim 1 wherein said pivotal connector is a flat elongated bar secured to one of said arms with one of its faces parallel to the selected arm and having means at one end for fastening it to the in-line switch against relative movement about the axis thereof.

8. The combination according to claim 7 wherein said elongated bar is formed with an elongated slot intermediate its ends, the selected arm of

9. The combination according to claim 7 wherein said fastening means comprises a clevis and a mating eye on the switch.