US1505730A - Insulator and support therefor - Google Patents

Description

H. O. ROCKWELL INSULATOR AND SUPPORT THEREFOR Filed April 3, 1922 i I INVENTOR. fqrfierlafiaafwell A TTORNEY Patented Aug. 19, 1924.

UNITED STATES PATENT OFFICE.

HERBERT O. ROCKWELL, OF NEW BRITAIN, CONNECTICUT, ASSKGNOR 'IO BRADY ELECTRIC 8: MANUFACTURING COMPANY, OF NE'W BRITAIN, CONNECTICUT, A.

CORIORAIION OF CONNECTICUT.

INSULATOR SUPPORT THEREFOR.

Application filed April 3,

T all whom 1' 2 may concern Be it known that I, HERBERT O. RoonwnnL, a citizen of the United States, and a resident of New Britain, county of Hartford 5 and State of Connecticut, have invented certain new and useful Improvements in Insulators and Supports Therefor, of which the following is a specification.

This invention relates to combination insulators and supports and more particularly to an improved form of split insulator and support for holding an insulated wire or cable at a distance from pole, wall or other surface.

One object of the invention is to provide a split insulator comprising a pair of interlocking sections which may be readily as sembled and taken apart.

A further object is to provide an insulator of the above nature which will be automatically drained and ventilated under all weather conditions.

A further object is to provide a tubular insulator of the above nature, having a series of longitudinal ribs which will exert a firm grip upon the conductor carried therein.

A further object is to provide a tubular insulator of the above nature having a series of relatively wide ribs on its inner surface whereby there will be little tendency for weakening the glass or porcelain of the insulator as is the case with the narrow ribs which have been used on such insulators in the past.

A further'obj ect is to provide an improved form of clamp for a split-insulator provided with a pair of detachable hinged aws.

A further object is to provide a split in sulator and clamp therefor which will be composed of relatively few parts and which will be simple, cheap to manufacture, and highly efficient and durable in use.

With these and other objects in view, there has been illustrated in the accompanying drawing one form in which the invention may be conveniently embodied in practice.

Fig. 1 represents a perspective view of the split insulator clamp showing a duplex insulated wire in position therein.

Fig. 2 is an elevational view of one section of the split insulator.

1922. Serial No. 549,347.

Fig. 3 is a similar view of the other section of the split insulator.

Fig. 4 is a. sectional view of the section of the split insulator shown in Fig. 3, taken along the line 4l, looking in the direction of the arrows.

Fig. 5 is a perspective view, partly broken away. of the screw-bolt, as it appears in one stao e of its manufacture.

d 6 is a perspective view of the stationary jaw of the insulator clamp, as it appears in one stage of its manufacture before the screw-bolt has been secured in position.

'Fig. 7 is a perspective view of the movable jaw of the insulator clamp shown in detaehed position.

Fig. 8 is perspective view of the machine bolt and nut employed to adjustablv hold together the hinged jaws of the in sulator clamp.

Referring now to the drawings in which like reference numerals denote corresponding parts throughout the SBVBZll views, the numerals 10 and 11 denote the two complementary split sections of a tubular insulator composed of any suitable insulating mall rial, but preferably of porcelain. Each of the split sections 10 and 11 is provided on its inner surface with three longitudinal relatively wide ribs 12 and 13, respectively These ribs 12 and 13 are adapted to firmly grip the surface of an insulated wirc 14 which may be carried therein, and by rea son of the grooves between said ribs. the surface of the insulation will at all times be exposed to the atmosphere, thereby pen mitting automatic drainage and ventilation to take place.

The insulator sections 10 and 11 are provided with intermediate cylindrical neck portions 15 and 16, and end flanges 1'2" and.

18 respectively. Moreover, on the flat inner.

faces of the insulator sections, interlocking?- ribs and grooves 19, 20, 21, and 22 are provided so that the parts will be accurately held in alinement when assembled.

In order to hold the split insulators and the wire carried therein in position spaced from a pole, wall or other surface, a pair of clamping jaws 23 and 24 are provided.

These clamping jaws are provided with semicylindrical central sections and 26 respectively. They are also provided with flat free end sections 27 and 28 having bolt holes 29 and 30 to receive an adjusting bolt 30. As clearly shown in Fig. 8, the adjusting bolt 30 is threaded throughout its length and is provided with a head 30 and nut 30 The stationary jaw 23 has a slightly curved end section 31, which is provided with a longitudinal hinge-slot 32, as clearly shown in Fig. 6. This hinge-slot 32 is adapted to detachably receive the tip 33 of the tongue 34. formed on the movable clamping jaw 24., so as to permit said jaws 23 and 24 to be readily opened and closed as desired.

As clearly shown in Fig. 6, the central portion 26 of the stationary clamping jaw is provided with a rectangular aperture 35 whose sides make angles of forty-five degrees with the sides of the aw 23. In order to secure the insulator and wire to a pole, wall or other surface, a screw bolt 36 is provided. This screw bolt 36 has a squared inner end 37 adapted to be inserted into the aperture 35 of the jaw 23, where.it is then upset to form an enlarged head, the outline of which is indicated by the dotted circle in Fig. 6. The stationary jaw 23 will thereby be permanently locked to said bolt 36. The opposite end of the bolt 36 is provided with screw threads 38 adapted to be screwed into the pole. The bolt is also provided with a flanged shoulder member 39 held against rotation by a pair of diametrically opposed ribs 40, and held against translation by said ribs 40 and an upset portionnot shown of the rod behind the shoulder. The clamping member and screw bolt are preferably constructed from iron or steel which may be later galvanized, but it will be understood that other suitable metals may be employed if desired.

WVhile there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only and that the invention is not to be limited to the specific disclosure but: may be modified and embodied in vari ous other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent, is:

1. A self-draining and ventilating insulator for holding an insulated wire or cable, comprising in combination, a pair of interfitting complementary sections adapted to enclose said wire or cable, each of said sec tions being provided with a plurality of wire engaging longitudinal ribs on its inner surface to grip the insulated wire or cable and adapted to permit drainage and ventilation thereof, said sections being adapted to be held together by a clamp.

2. In a self-draining insulator for holding an insulated wire or cable, a pair of semi tubular complementary sections, each of said sections being provided with a plurality of longitudinal ribs for gripping said insulated wire or cable and permitting drainage and ventilation thereof, said sections being adapted to be held together by a clamp.

In a self-draining and ventilating insulator for electrical conductors, a plurality of inter-fitting sections adapted to be clamped together to form a tubular body, each of said sections having a rib on its inner surface for gripping the outer surface of a conductor, the spaces between said ribs serving as channels to permit drainage and venti lation.

4. In a self-draining and ventilating insulator for an electrical conductor, a tubular insulating member composed of a plurality of intertitting sections adapted to be clamped together, said member having a plurality of longitudinal ribs on its inner surface, said ribs serving the double purpose of gripping the conductor and permitting drainage and ventilation thereof.

In a self-draining and ventilating insulator for electrical conducting wires, a pair of identical interfitting insulator sections adapted to be clamped together into the form of a tube, each of said sections having a plurality of longitudinal ribs on its inner surface, said ribs being adapted to grip the outer surface of said conductor, and the channels between said rigs permitting drainage and ventilation thereof.

6. In a self-draining and ventilating insulator for an insulated conducting wire, a pair of complementary semi-tubular wire engaging sections adapted to be clamped into tubular form for enclosing said con-- ducting wire, each of said sections having longitudinal ribs to grip said conductor and also having a rib and groove adapted to interfit with a similar groove and rib on the opposite section.

In testimony whereof, I have affixed my signature to this specification.

HERBERT O. ROCKWELL.

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