US1922276A - High tension switch - Google Patents

Description

Aug. 15, 1933- G. L. CARLISLE HIGH TENSION SWITCH 3 Sheets-Sheet 1 Filed Oct. 14, 1929 g- 1933- G. L. CARLISLE HIGH TENSION SWITCH Filed Oct. 14, 1929 5 Sheets-Sheet 2 Aug. 15, 1933. G. L. CARLISLE 1,922,276

HIGH TENSION SWITCH Filed Oct. 14, 1929 s Sheets-Sheet s Patented Aug. 15,1933 i V UNITED STATES PATENT orrics.

HIGH TENSION swrron George L. Carlisle, Kcnova, VJ. Va., assignor to Delta Star Electric Company, Chicago, 111., a Corporation of Illinois Application October 14a, 1925). Serial No. 399,624 1 Claims. (01. 200-48) This invention is a switch for high tension elecbetween which is pivotally mounted a link memt li i i v 'ber L, provided with a cross bar 28, which projects One of the Objects of the invention is to provide between and is pivotally connected with the arms an air breakswitch forzhigh tension lines conof a yoke member Y. Said yoke member is rigstructed of few parts and easy to operate. A furidly secured to the adjacent end ofth'e switch arm ther object is to provide a switch of the characor blade 29, so that the free ends so of yoke ter mentioned so constructedthat arcing is remember. project rearwardly toward the hub 25, duced to aminimum during operation. A further over and beyond the pivotshaft 31 of said link object is to provide a switch structureso armember L. A roller 32 is revolvably supported ranged that a movable switch arm may be dis between said free ends 30. i

engaged from a fixed contact clip bya preliminary Secured to the pivot shaft 31 is oneend of a rectilinear motion, and a subsequent arcuate torsion arm T, the other endextending under movement imparted to the arm, and said arm may the. switch arm 29, and being provided a bereengaged with said contact clip by areversal widened portion at its extremity which bears of thesemovements. A further object is to proagainst the underside of the blade. Said torsion vide simple means controlling the travel of the member is maintained under spring tension by Switchblade so as to insure the different movesuitable means preferably by the device illustrated merits thereof in predetermined sequence. A furin Fi ure 3. Referring to said figure, t. e torsion ther object is to provide simple torsion means to member T carries a fixed shaft 26o upon the pro-. assist the opening and to cushion the closing jecting portions of which are rotatably mounted movements of the switch. 3 sleeves 27 which .are of angular cross section.

The invention will be hereinafter fully set forth Each sleeve is encircled by a' helical spring and particularly pointed out in the claims. i 35, which may be anchored in any desired manner.

In the accompanying drawings: As shown in the drawings, one end portion of the Figure l is a top plan. view of a switch 0011- spring indicated at 35a is angularly bent to constructed in accordance with the invention. Fig form to the cross sectional contour of the sleeve ure 2 is aside elevation. Figure 3 is a detail secso that it will not rotate with respect thereto. tional view illustrating the torsion means, the The other end portion of the spring is preferother features of the switch being omitted. Figably soldered or brazed to the adjacent portion ores; and 5 are detail views illustrating the conof the shaft 26. The projecting portions of the troller cam." Figures 6 and '7 are detail plan and shaft 26a, and the portions of the sleeves 26 side views respectively, illustrating the operating which are encircled by the springs 35 are enclosed mechanism. 7 in suitable casings 34, all of which are clearly Referringto the drawings, 10 designates a base shown in the drawings. The arrangement is such provided with standards 11 and. 12, upon which that the sleeves 27 and the shaft 26a are so conare mounted insulators l3 and 14 respectively, of necte'd by the springs as to maintain a tension any desired capacity and construction. Also thetorsion T for a reason to be mounted in said base is a tubular standard 15 in later described preferably by the device illustratwhich is rotatably mounted a support 16, on which ed in Figure 3. Referring to said figure, the teris mounted an insulator 17 of any desired capacity sion member T carries a; fixed sl1aft26 of circular andconstruction. P cross section, upon theprojecting portions of Supported by'the insulator 14 is a stationary which are rotatably mounted sleeves 27, which contact clip 20 of any desired construction, are provided with angular peripheries. Each mountedonfl the base which carries said clip are sleeve 27 is encircled bya helical spring 35, which 100 guide members 22. Rigidly mounted upon the inmay be anchored in any desired manner. As

sulator 13 is aplate-like portion. 23, a support shown-in the drawings, one end portion of the member S. Said support member is provided spring indicated at 35 is angularly bent to conwith arms 24, diverging from the plate-like memform to' the peripheral, contour of the sleeve, so

her 239 Said member 23 is provided with a hub that the spring will not rotate with respect there- 105 like portion 25, which is-rigidly attached to the into. The other end portion of the spring is prefersulator 1 7, the standard 16 extending through ablysoldered 'orbrazed to the adjacent portion "said hub 25, as shown. If desired, a static shield of the shaft 26. Theprojecting portions of the 21 may be interposed between the insulators 13 shaft and the portions of the sleeves 27,

a pr vid d wit c p a s 26. olosedin suitable casings 34,'all of which are and lfiand the support member S. Thearms 24 which are encircled by the springs 35 are enclearly shown in the drawings. The arrangement is such that the sleeves 2'7 and the shafts 26 rotate one with respect to the other, and are so connected by the springs as to maintain a counterbalancing tension upon the torsion member T for a reason to be later described.

The yoke member Y is provided with lugs 36 to which one end of a link 37 is pivotally connected. The other end of said link is pivotally connected to a crank arm 38, rigidly secured to the upper end of the standard 16.

Rigidly carried by support member S is a stop member C, which is provided with an abutment 39 in its forward portion, and a curved cam-like surface 40 at the rear thereof. Said member is rigidly supported and has a general hook-like appearance when viewed in side elevation. It will be noted that the abutment 39 is positioned in the path of movement of the cross bar 22.

The assembly above described constitutes a single switch unit and any desired number of said units may be arranged in a row as may be desired.

The standard 16 may be rotated in any desired or well known manner commonly practiced in the art. For purposes of illustration (Figures 6 and 7), the standard 16 is shown as provided with a crank arm 50, to which is pivotally connected one end of a link 51. The other end of said link is movably connected with a crank arm 52, carried by a rotatable shaft 53 which is mounted in hubs 54, carried by brackets 55, which may be secured to a fixed support of any character. The lower portion of the shaft 53 is provided with a second crank arm 56 in which is pivotally mounted a handle 57. By moving said handle from the full line position of Figure 7 to a horizontal. position at right angles thereto, power may be applied to the crank arm 46 to rotate the shaft 53. Obviously, rotation of said shaft will impart rectilinear movement to the link 51. In order to operate a plurality of the switches in unison, each standardlS is provided with a second crank arm 60, which is connected with a link 61, so that rotation imparted to one of said standards 16 will impart corresponding rotation to the other standards 16 of the group.

Assuming the parts to be in the circuit closed condition illustrated in Figure 2, the operation is as follows:-

Rotation of the standard 16 through the medium of the shaft 53 and link 51 causes a horizontal arcuate movement of the crank arm 38, and a consequent pulling tension applied by the link 37 upon the switch arm 29 through the yoke member Y. The tendency of said switch arm to move in an arcuate path tending to raise its free end is prevented during pivotal movement of link member L, and until such pivotal movement is arrestedby engagement of the cross bar 28 with the abutment '39 of control member C. Therefore the initial pull of the link 37 upon the switch arm 29 results in a rectilinear movement of said arm, rearwardly toward the stop member C. This movement causes the link member L to swing upon its pivotal support until the cross bar 28 has moved into engagement with the abutment 39 of the control member, at the same time increasing the tension upon the counterbalance springs 3'5. As the link member L moves to the last mentioned position, the yoke member Y has been elevated, so that the roller 31 passes over the end of the stop member C, and comes in contact with the curved surface 40. By this time, the free end of the switch begins to swing upwardly before it can rotate.

on its pivotal connection 28 with the link member L, and the said curved portion 40 so controls the further movement of the switch arm as to cause it to move in an arcuate path to the final open position. This arcuate movement is greatly assisted by the arm T through the counterbalancing effect created by increased tension of springs 35 caused by the described pivotal movement of link member L. It will be noted that the free end of the arm T slidably engages the underside of the switch blade, so as not to interfere with rectilinear movements of said blade. When the movement of the crank arm 38 is reversed, the cam 40 will first cause the switch arm 29 to move through an arcuate path in the return direction, until said arm assumes a more or less horizontal position, but with the cross bar 28 still in engagement with the abutment 39. Just before said pivot leaves said abutment, the free end or the switch arm will have assumed an approximately horizontal position between the clip members 22, the downward movement being cushioned by arm T, and thereupon the continued movement of the crank arm 38 and the link 37 will cause the switch arm to move in a rectilinear direction toward the clip 20, and slidably over the free end of arm T.

The advantages of the invention will be readily understood by those skilled in the art to which it belongs. It will be particularly noted that the switch arm is caused to travel in rectilinear and arcuate paths in predetermined sequence, and that the stop member is so arranged with respect to the other elements of the switch that to assume the opening of circuit breaking position, the switch arm must first travel in a rectilinear path Likewise, upon operating the switch to close the circuit, it is impossible for the switch arm to move in a horizontal direction until it has first traveled through the predetermined angle of approximately 105 to the horizontal position, after which the supported end of the arm has passed out of engagement with the stop member, and the contact end of the switch arm has engaged the sleet hood. An important advantage is that auxiliary means are provided for aiding the operating mechanism to move the switch to open position, and to cushion it as it moves to closed position. It will also be observed that a very simple form of air break switch for high tension lines is provided, that it is arranged for easy and accurate operation, and that tendency to produce objectionable arcing is reduced to a minimum.

Having thus explained the nature of the invention and described an operative manner of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what is claimed is:

'1. A switch of the character described comprising a fixed support, a switch blade, a link member pivotally mounted on said support and provided with a cross bar pivotally connected with the switch blade, a movable torsion member engaging said blade, means operated by movement of the link member for applying a yieldable tension to the torsion member, so as to assist the arcuate movement of the blade in the first mentioned direction and to cushion movement of the blade in the opposite direction, and a contact clip cooperating with said switch blade.

2. A switch of the character described comprising a fixed support, a switch blade, a shaft mounted to rotate in said support, a link member connected to move with said shaft and provided 'with a cross bar pivotally connected with the switch blade, movably mounted actuating means connected with said switch blade so as "to rock said link member on its pivot, stop means for arrestingpivotal movement of the link member in one direction, said stop means being positioned to engage said cross bar, so that operation of said actuating means to move the link member in the last mentioned direction will cause the switch blade to first travel rectilinearly and then in an arcuate path, and vice versa during a reversed operation of the actuating means, torsion means connected with said shaft and including a sup port member slidably engaging said switch blade so as to counterbalance said blade during its arcuate movement, and a contact clip cooperating with the switch blade. i

3. A switch of the character described comprising a fixed support, a switch blade, a yoke secured to said switch blade, a link member pivotally mounted on said support provided with a cross bar connected with said yoke, a rotatable shaft provided with. a crank arm, a link connecting said crank arm with said yoke so, as to rock said link member on its pivot, stop means lying in the path or movement of the cross bar, so as to arrest movement of the link member in one direction, said stop means being positioned to engage said cross bar, so that operation of said actuating means to move the link member in the last mentioned direction will cause the switch blade to first travel rectilinearly and then in an arcuate path, and vice Vera during a reversed op eration of the actuating means, counterbalance,

means connected with the pivotal mounting of 'said link member so as to be placed under tension during movement of the cross bar toward said stop means, and a pivotally supported arm having a one end connected with said spring counterbalance meansand having its other end loosely engaging said blade, and a contact clip cooperating with said switch blade.

4. A switch or" the character described compris ing a fixed support, a link member pivoted at one end to said fixed support, a switch blade connected to the other end of said link member, means for applying an: approximately rectilinear pulling force to said blade so as to impart movement to the blade, a stop member mounted on said fixed support'and positioned to arrest-pivotal movement of the link memberin one direction, said pulling means, said stop member and said link being constructed and arranged to impart rectilinear and arcuate movements to said blade in predetermined sequence, and counterbalance means connected with said link and engaging said blade so as to counterbalance the blade during its arcuate movements.

5. A switch of the character described comprising a fixed support, a link member pivoted at one end to said support and having a cross bar in its other end, a switch blade pivotally connected to,

said cross bar, means for applying an approximately rectilinear pulling force to said blade to impart movement to the blade, a-stop member mounted on said fixed support and positioned to engage said cross bar during pivotal movement of the link member in one direction, said pulling means, said stop member and said link being constructed and arranged to impart rectilinear and arcuate movements to said blade in predetermined order, counterbalance means controlled by said link member, and a pivotally supported torsion arm connected at one end with said counterbalancing means, the other end of said torsionarm movably engaging the switch blade, so asto counterbalance said blade during arcuate movement thereof.

6. A switch of the character described comprising a fixed support, a link member pivoted at one end to said fixed support, a switch blade connected to the other end of said link member, means for applying an approximately rectiiinear pulling force to said blade to impart movement to the blade, a stop member positioned to arrest pivotal movement of the link member in one direction,,said pulling means, said stop. member andsaid link being constructed and arranged to impart rectilinear and arcuate movements to said blade in predetermined order, torsion means conof the link in one direction, and a torsion arm connected at one end with said counterbalancing means and having its other end movably engaging said switch blade. '7. A switch of the character described comprising a fixed support, a link member pivoted at one end to said fixed support and having a cross bar at its other end, a switch blade pivotally connected to said cross bar, means for applying an approximately rectilinear pulling force to said blade to impart movement to the blade, a stop member positioned to engage said cross bar during movement of the link member in one direction, said pulling means, said stop member and said link being constructed and arranged to impart rectilinear and arcuate movements to the switch blade ,in predetermined order, spring counterbalance means connected with said link member and so arranged as to be placed under increased tension during movement of the cross bar toward said stop member, and a torsion arm pivoted at one end to said link member and connected with said counterbalance means, the other GEORGE L. CARLISLE.

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