US1246303A - High-tension line-switch. - Google Patents

Description

E. A. MUCKEY.

HIGH TENSION LIINE SWITCH. APPLICATION FILED MAR. 26, 1917.

Patented Nov. 13, 1917.

IN VEN TOR. 5a); [4, kixcfl ey WITNESS:

A TTORNE YS.

UNITED STATES PATENT l -FFICE.

EARLE A. MUOKEY, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO EDWIN W. IBEARDSLEY, OF SAN FRANCISCO, CALIFORNIA.

HIGH-TENSION LINE-SWITCH.

Specification of Letters Patent.

Patented Nov. 13, 1917.

Application filed March 26, 1917. Serial No. 157,319.

To all whom it may concern:

citizen of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in High-Tension Line- Switches, of which the following is a specification.

My invention relates to high-tension electric line switches of the type known as poleswitches.

The object of the invention is to provide a switch, of simple and strong construction, which may be inserted in a high-tension aerial line for the purpose of opening or breaking the circuit. Switches of this type are usually mounted upon poles or towers, or the cross-arms thereof, and are operated by means of a handle or rod extending downward to a convenient position. By the present invention, I have provided a switch of this type which may be inserted in the line without any additional strain insulators, and without otherwise supporting the line than by the switch itself. This is accomplished by constructing the switch so that the axis of the movable member thereof is in alinement with the line wire, thus permitting the switch to be entirely selfcontained as regards. end strains due to the pull of the wire.

Further advantages of my switch are the provision for a double break, so that the movement of the movable member need be only half that of a single break switch; provision for fusing the line in combination with the switch; and adaptability to lines of any number of wires or arrangement, by providing a complete self-contained switch unit for each line wire, and connecting all together for simultaneous operation. Moreover, the insulating members of my switch are standard articles of line construction, are interchangeable, and are readily removable for replacement.

The invention will hereinafter be described, and is herewith illustrated, in its preferred form, but it is to be understood that changes, within the scope of the claims hereto appended, may be made in the form and construction of the device without departing from the spirit of the invention.

With this in View, the invention will now be fully described with reference to the accompanying drawings, wherein-- Figure l is an and elevation showing my switches as applied to a three-phase line.

Fig. 2 is a side elevation, enlarged, of one of my switch units.

Fig. 3 is an end elevation of the same.

In the drawings, the reference numeral 1 designates any suitable support, as for example the crossarm of a pole or tower 1. Upon said cross-arm I mount a base plate 2, which has a bearing cap 3 removably secured to its upper side. Said base plate and cap form a support for a rotatable rod or shaft 4, preferably hollow for the sake of lightness, and provided with thrust collars 5 to prevent lineal movement with respect to said base.

Into the ends of the hollow shaft 4 are secured, as by means of rivets or pins 6, short projecting shafts 7, whose outer ends are secured, in any well known manner, to bell strain insulators 8 of any suitable and well known form. In the switch herewith illustrated, I have shown two of such bell insulators 8 at each end of the shaft, but it is to be understood that any number thereof may be used, depending mainly on the voltage of the line.

The two ends 9 of the line wire in which the switch is to be inserted are fastened to the outer faces of the bell insulators 8, preferably by being tied to transversely dis ports an inclined post insulator 11, of any' well known form. Secured to the top of said insulator, as by means of clips 12, is a fuse stick 13, set parallel with the shaft 4. This fuse stick preferably comprises a hollow bar of wood or other insulating material, through which is run a fusible conductor 14. At the ends of said fuse stick are mounted contact clips 15, with which the ends of the fuse 14 are connected. Said clips are properly positioned to receive contact blades 16 carried by the ends of the arms 10, so that electrical connection is normally established between the two ends of the line wire 9 by means of said arms 10, the contact members 16 and 15, and the fuse 14.

When it is desired to open the switch, the shaft 4, carrying the strain insulators 8 and the armslO, is rotated to move the blades 16 out of contact with the clips 15, as shown in the drawings. For this purpose, a lever 17 is secured to said shaft 4:- Where two or more switches are to be operated simultaneously, the levers 17 are all connected together by a bar 18, as shown inFig. l, and a second lever 19 is preferably fixed upon the switch shaft nearest the pole 1', from which lever arcd 20 is extended downward to a position for convenient operation.

The advantages of my switch will at once be apparent to those skilled in the art. The fact that the strains due to the lineal pull of the line wire 9 are entirely balanced, and that said wire is entirely supported by the switch itself. without in any manner interfering with its operation, constitutes an important feature of the invention. Moreover, each switch is entirely self-contained, so that said switches may be used singly or in groups without any change in constructtion, and any one switch of a group may be repaired or replaced without disturbing the others.

The conductor 14, which has been described in its preferred form as a fuse, may, of course, be made of non-fusible material, or may be made of sufficient capacity to have no function as a fuse, if no fuse be desired. In this case the fuse stick 13 may be replaced by a solid conductor bar, such form being an obvious modification of the invention, and not shown in the drawings.

Finally, the use of standard articles of manufacture for the insulators 8 and 11 greatly simplifies the construction and repair of the device.

I claim:

1. A high-tension line switch comprising a shaft; a bearing in which said shaft is rotatably mounted; limiting collars on the shaft at each end of the bearing; an insulator disk on each end of the shaft; a conducting arm secured diametrically to the outer face of each disk, providing for the attachment to the arm, in line with the axis of the shaft, of the ends of the line wire in which the switch is interposed, said arms projecting radially from the disks; a fixed conductor sup-ported parallel with and insulated from the shaft; contact clips carried by each end of the conductor; a contact blade carried by the free end of each disk arm, adapted to make'and break electrical connection with the contact clips, by the rocking of the shaft on its axis; and means for rocking said shaft.

2. A high-tension line switch comprising a shaft; a bearing in which said shaft is rotatably mounted; limiting collars on the shaft at each end of the bearing; an insulator disk on each end of the shaft; a conducting arm secured diametrically to the outer face of each disk, providing for the attachment to the arm, in line with the axis of the shaft, of the ends of the line wire in which the switch is interposed, said arms projecting radially from the disks," a fixed hollow fuse stick supported parallel with the shaft; a fusible conductor passing through said stick; contact clips carried by each end of the fusible conductor; a contact blade carried by the free end of each disk arm, adapted to make and break electrical connection with the contact clips, by the rocking of the shaft on its axis; and means for rocking said shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EARLE A. MUGKEY.

W'itnesses:

WM. F. BOOTH, D. B. RICHARDS.

copies of this patent may be obtained for five cents each, by addressing the tomniisstoncr of Patents,

Washington, D. G.

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