US992570A - Insulator. - Google Patents

Description

H. R. MARKEL.

INSULATOR. APPLICATION FILED JULY 1, 1910.

992,570, Patented May16,1911.

mg 3a,

My, Q. I I Gum; 6

I Slabs $70.

' To all whom it may concern:

I particularly to that type of electrical insulator shown in my prior Patent 8-7 8,302, dated- February 4th, 1908, in which the insulator isformed of two sections of porcelain or similar material, said sections being secured together by ascrew. or other fastening device, which also serves to secure the insulator body to a part of a buildingcr other support.

The object oft 'he present invention is to provide a two-part insulator of improved construction, to soconstruct the sections or members that they will efficiently grasp the electrical conductors to be supported thereby, and to so construct them that they will not possess undmirable projections.

Further objects .and advantages of themvention will be set forth in the detailed description whichnow followsz In the accompanying drawing, Figure 1 is a vertical section of an insulator constru'ctedin accordance with the invention,

Fig. 2 is a perspective view of one of the members thereof, and, Fig. '3 is a plan view of oneof said members, illustrating a slightly modified form of retaining groove. Like numerals designate corresponding parts in. all of the figures of the drawing.

Referring to the drawing, the numerals 5'and 6 designate a pair of substantially L- shaped sections, the ends of each of the longer portions" of saidsections bemg provided with grooves"? and 8 adapted to register when said sections are brought together face to face with the grooves 9 and 10, formed in the inner faces of the short portions f said sect ons, said grooves servlng to receive the electrical conductors 12which are supported by the insulator. A passageway 13 is formed partly in the section 5 and partly in the section 6, it being understood that a screwnor other. fastening device may be passed through said passageway in either direction ,to therebysecure the insulator to ianydesired part of a-building or other suppo The-' form of the invention lllustrated 1n exactly like that illustrated in Figs. and 2 except-that the grooves .8 and 9 TED STAWENT HARLEY a. MARKEL, or COLUMBUS, orno, Insura'ron.

Specification of Letters Patent.

Application filed July 1, 1910. Serial No. 569,912,

Patna-my a11- formed in a section 6 are notched'ficor ase-rs rated to more securely graspfthe cnductors l2. I i x From the.foregoing description tavi l l be seen that the insulator hereinwsiowneand described comprises tworidentically'formed sections, either of which is iadapte d to form the upper or lower 'meniber-"'of' 'theicompleted insulator. It. will z-furthermore be seen that the placing in'po'sitionrof theascrew that secures the insulator in place, serves to bind the two sections of the insulator into permanent engagementwitheach other.

There are several reasons why an insulator of this character possesses important advantages over the insulator shown in my prior patent and 'over-otherstructures along the same 'line. In the first. place, the insulator herein shown and, described may be very'economically manufactured. v.The'se in.-

sulators are formed with dies. The fewer.

- each other so that a die with a number of projections and depressions will not wear nearly so long as one having the plain flat surface necessary in making the insulator" herein shown and described. Furthermore,-

an insulator having a number of projections is very often broken in shipment. In ship-' ping these insulators, they are thrown loosely in barrels, sometimes with a. small amount of excelsior or shavings; Since these barrels receive very rough handling in transit any insulator having a number of fragileprojections is likely to be broken. This is not so however, with an insulator constructed with smooth faces and heavily made, as is the present device. The vertical, flat, inside face 14 is desirable for several reasons. First, the top section of the insulator co'mes-vertically down upon the bottom section thereof. This' ren-- ders it easy to insert and drive home the fastening device, whether such fastening device be a nail, screw, or bolt. Furthermore, in pressing out the insulator in thecourse of manufacture, a more even pressure may be applied than is possible with a number of depressions and slanting faces. It is quite necessary that the insulators all have the same pressure applied .in molding, since if too great a pressure is applied they go to pieces under strain of expansion in the kiln and if not enough pressure, they; come from the kiln too porous to be of service.

It is to be understood that the invention'is not limited to the vprecise construction set forth, but includes Within its purview such changes as may be made Within the scope of the appended claims. l

Having described my invention, What I claim is:

1. An insulator comprising two identical L-shaped sections, the central meeting Walls thereof beingfiat and Vertical, and the horizontal meeting Walls thereof having transverse registering grooves formed therein.

2. An insulator comprising two identical L-shaped sections, the central meeting Walls thereof being flat andv vertical, and the horizontal meeting walls thereof having transverse registering grooves formed therein,

there being a central passageway formed through said insulator which lies partly in one of said sections and partly in the other.

8. An insulator comprising two identical L-shaped sections, the central meeting Walls thereof being fiat and vertical, and the horizontal meeting Walls thereof having transverse registering grooves formed therein, there being a central passage-way formed through said insulator which lies partly in one of said sections and partly in the other, said grooves havlng serrated Walls.

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

HARLEY R. MARKEL. \Vitnesses: R. B. CAVA'NAGH, J. P.' EAGLESON.

Images