US1277981A - Oil-switch for high-tension electric currents. - Google Patents

Description

H. L. MATHERS.

OIL SWITCH FOR HIGH TENSION ELECTRIC CURRENTS.

APPLICATION FILED SEPT.2!. WW.

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01L SWITCH FOR HIGH TENSION ELECTRIC CURRENTS. APPLICATION FILED SEPT. 2|, m1.

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COMPANY, 01' WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

OIL-SWITCH FOB HIGH IEN'SION ELECTRIC CURREN'I'S.

Specification of Letters Patent.

Patented Sept. 3, 1918.

Application filed September 21, 1917. Serial No. 198,590.

To all whom it may concern:

Be it known that I, HERBER L. MATHERB, a citizen of the United States, residing at Tamaqua, in the county of Schuylkill and State of Pennsylvania, have invented certain new and useful Improvements in Oil- Switches for High-Tension Electric Currents, of which the following is a specification.

This invention relates to oil switches for high tension electric currents and the object of the invention is to provide a very simple and economical oil switch so constructed that it may be used to complete electric circuits carryin high tension currents without danger o arcing and without danger of the operator being shocked while manipulating the switch.

Switches have heretofore been provided in which the moving contact points were immersed in an oil bath to prevent the formation of an arc, or the production of sparks at the moment of making or breaking the circuit. However, these switches have been quite complicated and consequently expensive to manufacture. It is primarily the object of the present invention to secure the desired results, namely, the provision of a are secured will comprise few, simple andinexpensive parts.

Further objects and advantages of the invention will be set forth in the detailed description which now follows.

In the accompanying drawings Figure 1 is a face view of the switch;

Fig. 2 is an elevation of the inside face of the cover of the switch, and the parts carried thereby;

Fig. 3 is a face view of the switch with the cover and the parts carried thereby removed;

Fig. 4 is a vertical sectional view; and

Fig. 5 is a detail sectional view. through a pointer carried by the operating shaft.

Like numerals designate. corresponding parts in all of the figures of the drawings.

Referring to the drawings, 5 designates a box or caslng having a lining 6 of sheet lead which makes the same oil tight. A

cover 7 may be held in lace in any desired manner, as for example y screws 8, as illustrated in Flg. 4 or by straps 9., as indicated m Fig. 1. In the latter case the straps will be provided with locks 10 to prevent unauthorlzed persons from removing the cover. The bottom of the receptacle receives a slate plate 11 and the top 7 carries a slate plate 12. The slate plate 12 supports a plurallty of, in the present instance, three, U- shaped resilient contacts 13, that are secured to plate 12 by countersunk screws 14.. The plate 11 carries a corresponding number of U-shaped sprlng contacts 15 that are secured to said plate 11 by countersunk screws 16.

Journaled in the plates 11 and 12 and in cured thereto for rotation therewith a disk- 1? of insulating material and this disk carrles a plurality of copper buttons 20, there be ng as many of said buttons as there are pairs of contacts 13 and 15 respectively.

When, by a partial rotation of shaft 17, the several copper buttons are caused to move between the members of the pairs of contacts 13 and 15, a circuit will be completed between these contacts. Suitable contacting wires, indicated at 21, lead from the contacts 13, and suitable contacting wires 22 lead from the contacts 15. It is to be understood that when in use the casing is filled with oil to such a point that the several contacts are submerged in the oil so that when the buttons 20 move between the contacts 13 and 15, arcing or the formation of sparks, is posltively prevented. Furthermore, the immersion of the contact points and the buttons in oil prevents corrosion thereof and kee s these parts clean and in condition to ma e a highly effective contact.

Furthermore, it is to be noted that when moving into contacting position a rubbing action between the buttons and the resilient manifestly well within the range of the.

obvious to vary the number of contacts to suit the particular conditions at any given time.

While the elements shown and described are well adapted to serve the purposes forwhich they are intended it is to be understood that the invention is not limited to the precise construction set forth but that it includes within its purview such changes as fairly come within the spirit of the appended claims.

Having described the invention, what I claim is:. 1

1. The combination with'an oil tight casing, of a'shaft mounted to rotate therein, a disk of insulating material carried by said shaft, metallic buttons carried by said disk of insulating materialand projecting therethrough, blocks of insulating material disposed upon opposite'sides of said disk and lying in substantial parallelism therewith, contact members of resilient material .and of U-shape, one of the legs of said contact members being secured to the corresponding block of insulating material and the other and free legs of'said contact members being disposed in the path of movetent acting to stop the same in ment of the buttons of the insulating disk, an indicating pointer carried by the shaft and located outside of the casin and a doat position where the buttons of the insulating disk lie directly between and establishes communication between the op osed contact members.

2'. A device of t e character described comprisin a box-like oil tight casing, blocks of insulating-material secured therein and lying in spaced relation to each other a shaft mounted to turn in said blocks of insulating material, a of insulatin material carried by and turning with sai shaft, a plurality of contact buttons carried by said disk and projecting therethrough and beyond the opposite side thereof, a plurality of contact members secured-to each of the blocks of insulatin material, said contact members being of fi-shape and being formed of resilient material and comprising free legs which lie in the path of movement of'the contact buttons, an indicating pointer carried b said shaft outside of the casing and space detents for engaging said pointer and holding the same in the contact making position of the buttons.

In testimony whereof I aflix my signature in the presence of two witnesses.

HERBERT L. MATHERS. Witnesses:

Wm. H. Woonwmn

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