US1519402A - High-tension operating switch - Google Patents

Description

Decca 1924- I 1,519,402

' M. E. GRAVES ET AL HIGH TENSION OPER ATING SWITCH Filed Dec. 14, 1921 Patented Dec. l6, 1924-.

UNITE STATES PATENT QFFICE.

MOSS E. GRAVES AND CARL C. SEVERIN, SAN FEANGISCO. CALIFORNIA.

HIGH-TENSION OPERATING- SWITCH.

Application filed. December 14, 1921.

To all iii/ 20m it may concern;

Be it known that we, Moss E. Gnnvns and CARL (I. SEYERIN, citizens of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in High-Tension Operating Switches, of which the following is a specification.

This invention relates to high tension operating switches, and especially to air break switches such as are arranged for mounting on poles, transmission towers and the like.

The object of the present invention is to generally improve and simplify switches of the character described;'to provide a switch which is auapted to make or break contacts directly on the transmission line span; a switch in which both the movable and stationary parts are self-aligning with and substantially supported by the transmission line; a switch which is insulated and supported entirely by suspension insulators; a switch which will make a double break in the line of any length desired, and which may be readily insulated to handle high potential circuits of 100,000 volts or more; a switch in which all movable parts aredead and may be grounded wh'en'the switch is in open position; further a switch which may be readily operated from the ground or a distant point of control and which is not adversely affected by weather conditions.

Other objects will hereinafter appear.

The invention consists of'the parts and the construction, combination and arrangement of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Fig. 1 is a side elevation of the switch.

Fig. 2 is a cross section on line 22, Fi 1.

Referring to the drawings in detail, and particularly to Fig. 1, A indicates a suitable support, for instance such as may be provided by means of a transmission line tower or pole, as here illustrated. The transmission line carried by the support is generally indicated at B and is in this instance dead ended with relation to the pole by means of dead end insulators as indicated at 2 and 3, the insulators provided being of the disk or suspension type and being secured to the pole by means of eye-bolts or the like as here illustrated; the ends of the line being sci-1&1 no. 522.4 15.

similarly secured to the insulators b eyebolts and clamps as indicated'at 4:. *arried directly by the transmission line and suitably secured thereto at any convenientpoint adjacent the dead end insulators 2 and 3 is a pair of stationary contacts, one being shown at 5, and one at 6. These contacts are stationary on the span and may be constructed in any suitable manner; the structure depending to a great extent upon the amount of voltage carried.

F or the purpose of protecting the line against arc-overs or flares, slate deflectors, such as indicated at '7. may be employed, and other protecting means may also'be provided, but are in the present instance neither shown nor described as such features doiijot form a particular part of the present invention.

Secured a suitable distance below the dead end insulators, indicated at 2 and 3, is a cross arm 8., and disposed between the cross arm 8 and the outer ends of the dead end insulators is a pair of guides as indicated at 10 and 11. These guides are secured between insulators of the suspension type, as indicated at 9, 12, 13 and 14:; the suspension insulators 9 and l l being carried directly by the transmission line, while thesuspension insulators 12- and 13 are secured to the cross arm. The guides 10 and 11 are thus held in'a vertical position with relation to the line, and while maintained under suf ficient tension to maintain a fairly rigid position, it is obvious that a certain amount of flexibility and give with relation to the line will be provided as will hereinafter be described.

The guides just referred to are provided for the reception of themovable switch which consists of a cross frame 15, a pair of uprights 16 and 17, and pair of contacts 18 and 19. The cross frame is provided with bushings 20, which form bearings with relation to the guides 10 and 1.1, and as these bushings are faarly free, it obvious that vertical movement of the cross frame with relation to the guides and the stationary contacts 5 and (5 will be permitted. The movable portion of the switch, taken as a whole, is preferably raised and lowered from a distant point, or by a tackle which may be manipulated from the ground or base of a pole, and while a varying form of mechanism may be employed, we have here illustrated a simple form of pulley arrange ment which consists of a block 21 and a cable 22. A suspension insulator is secured to the upper end of the cable and the opposite end of this suspension insulator, which is shown at 23, is again attached to the cross frame 15, thus forming insulation between the cross frame or the movable part of the switch and the cable and block. The cable may otherwise be guided with relation to the pole and in this instance is extended to the base; the lower end of the cable being provided with a counterweight to offset the main weight of the movable portion of the switch. A section of the cable consists of a chain, as shown, and as this passes through a guide indicated at 24, it can be seen that a padlock or the like may be passed through the links of the chain and the guide and thus prevent tampering by unauthorized persons. A pair of collars fixed on the cable will limit the movement of the movable portion of the switch, both in an upward and in a downward direction, thus preventing damage to the suspension insulators at either end if excess movement should be imparted to the switch.

The present structure involves many important features:

First: It can be seen that the structure is exceedingly simple and substantial; comparatively few parts are employed, and such parts as are employed are of standard construction and readily obtainable. Installation may therefore be made at practically any point as the material required is almost always available.

Second: As the stationary contacts are carried directly by the transmission line and the guides for the movable switch are similarly secured to the transmission line, it can readily be seen that alignment between the movable parts of the switch and the stationary parts is automatically taken care of, thus sag or side sway in the line will in no way affect the operation of the present switch.

Third: The method of dead ending the line withrelation to the support is eXceedinglysimple and is in fact substantially such as employed in standard practice, and as insulators of the suspension type are employed, it can readily be seen that insulation against exceedingly high voltage can readily be taken care of.

I Fourth: The present switch provides two breaks inthe line and as such substantially reduces the vertical height of the switch to one-half. of that ordinarily required. 7

Fifth: All movable parts employed are dead and may be grounded when the switch is in open position; this may be accomplished by employing a chain, which is connected with the groundat one end, for instance through means Of a cable. This chain may be thrown over the cross frame 15, when the switch is lowered or opened, and all movable parts are thus grounded.

Sixth: The mechanism whereby the switch is raised and lowered is insulated bysuspension insulators as indicated at 23, and therefore eliminates all danger as far as the operator is concerned.

Seventh: Another important feature to be taken into consideration is the fact that the present switch structure will not be affected by extreme climatic variations, for instance icing over or freezing of the'contacts shown at 5, 6, 18 and 19, will in most instances not take place due to the fact that there is usually a certain amount of vibra tion and movement in the line. The con tacts are thus working with relation to each other and will therefore effectively prevent freezing or icing over.

While certain features of the present invention are more or less specifically illustrated, we wish it understood that various changes in form and proportion may be resorted to within the scope of the appended claims, similarly that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate or varying uses may demand.

Having thus described our invention, what we claim and desire to secure by Letters Patent is r 1. The combination with a high potential transmission line and a support therefor having insulating units dead ending the line with relation to the support, of a pair of stationary contacts one on each line, a switch member movable with relation to the contacts, and guides therefor supported by the line to maintain substantial alignment between the stationary contacts and the movable switch member.

2. The combination with a high potential transmission line and a support therefor having insulating units dead ending the line with relation to the support, of contacts carried by the line, a cross arm on the support,.a.pair of guide members, suspension insulators connectingthe-opposite ends of the guides with the cross arm and the line respectively, and a switch member movable on the guides to and away from the contacts.

3. The combination with a high potentialtransmissioniline and a support thereforhav-ing insulatory units dead ending the line with relation to the support, of contacts carried by the line, a cross arm on the support, apair of guide members, suspension insulators connecting the opposite ends of the guides withthe cross arm and the line respectively, a switch-member movable on the guidesto and away from the contacts,-

and means for imparting movementto the switch upon the guides.

4. The combination with a high potential transmission line and a support therefor having insulating units dead ending the line with relation to the support, of contacts carried by the line, a cross arm on the support, a pair of guide members, suspension insulators connecting the opposite ends of the guides with the cross arm and the line respectively, a switch member movable on the guides to and away from the contacts, means for imparting movement to the switch upon the guides, and means insulating the switch with relation to the last named means.

5. The combination with a high potential transmission line and a support therefor having suspension insulators dead ending' the line with relation to the support, of

a pair of stationary contacts carried by the line, a cross arm on the support, a pair of guide members, suspension insulators connecting the opposite ends of the guides with the cross arm and the line respectively, a cross frame sliclably mounted on the guides, contacts carried by the cross frame and movable in unison with the cross frame to and away from the stationary contacts on the line, a cable carried by the support adapted to raise and lower the cross frame and the contacts carried thereby, a suspension insulator interposed between the capable and the cross frame, and means for limiting the movement of the cable.

MOSS E. GRAVES.

CARL (l. SEVERIN.

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