US918905A - Insulator. - Google Patents

Description

B. A. POND.

INSULATOB.

APPLIUATION FILED SEPT. 6, 190B.

Patented Apr. 20, 1909.

UNITED STATES PTENT onirica.

BENJAMIN A. PONI), OF BOSTON, MASSACHUSETTS.

INSULATOR. 1

specification of Letters Patent.'

Patented pm 2o, 1909.

l VApplication filed September 5, 1908. S/erial No. 451,768.

To all whom it may concern:

Be it known thatHI, BENJAMIN A. POND, a citizen of the United States, residing at Boston, in the county of Suolk and State of Massachusetts, have invented new and i Improvements in Insulators, of which the following is a specification.

invention relates to improvements 1n insulating devices, andthe object is to provide'an insulating device into which a wire may be quickly and. easily introduced insulator and which shall the swaying of the tree is not apt to break the wire for the reason that the wire is free to slide longitudinally therethrough.

The invention consists in the combination and arrangement of parts set forth in` the following s ecification and particularlypointed out in t e appended claims.

Referring to the drawing: VFigure 1 is an lelevation of `an insulator embodying my invention, the `same being closed asit appears when in use. Fig. 2" is an elevation of the insulator shown in its open position, the upper half of the insulating being removed for the introduction of the Wire. Fig. 3 is a sectional elevation taken Online 3-3 vof Fig. 1, looking toward the left.

Like numerals refer to like parts through- Vout the several views of the. drawing.

ln the drawing, 5 is a holder comprising two parts 6. and 7 provided, respectively, with ears 8 and 9 through which a pivotal pin 10 extends, said parts constituting a ling which is located in an annular groove 11 formed in an insulating bushing 12, said bushing being made up of two parts 13, 13

and said bushing having a central hole 14 adapted to receive a wire such as the wires Y in use in the streets for the transmission of electricity for electric lighting and power purposes. The hole 14 is preferably rounded at both ends so as not to chafe the insulation on the wire. 'The wire, which is not shown, is placed'in the lower half of the bushing 12 bushingY instead of when the parts are in the position shown in Fig. 2, the upper half of the bushing is then .brought in place above the lower half and there is preferably placed between the'abutting faces of both parts an element 1,5 which f'preferably consists of a suitable cement which permanently unites the parts of the bushing ,so that they constitute an unbroken ring, thus reventing any grounding which might possl ly take place were it not for the provision of this element. When the two parts ofthe bushing are thus united, the

vupper part 6 of the holder is then swung down into place into the position shown in Fig. 1 and secured in such position by means of a bolt 16 passing through the parts 6 and 7 and having screw threaded engagement with a'nut 17 by which said parts are securely united, thereby holding the insulating bushing 12 in place.

Without departing from the spirit of my invention, the element 15 might consist of vsoft gutta-percha or rubber of the proper thickness sol that the same would be compressed by ti htening the nut 17 on the bolt 16. It will aso be understood that if desired providing the insulating bushing with the oove, that the holder may be provided wit a groove adapted to receive a correspondingprojection on the bushing.

To secure the hplder to a support, such, for example, as a tree, I provide any suitable means, as for example, a screw 18 which in vthis instance' is formed integral with the part 7 said screw being'adapted to be screwed into the tree.

One ofthe great advantages secured by the device of my invention as compared with other insulating devices is that the Wire may be placed therein without cutting owing to the fact thatl the bushing is made in .two arts and yet the device when assembled orms as erfect an insulator as if the bushing were a so id ring owing to the provision of the elementv 15.- Another great advantage secured bythe use of my device is that the wire is free to slide longitudinally through the hole 14 so that the wire is not subjected to such strain as in the case of insulators in which the wire isrigidly secured thereto and,

therefore, in the use of my device the sway-v ing of the tree to which it may be attached is Anot apt to break the wire as is the case in the other mentioned devices.

The insulating bushing 12 may beformed of any suitable material, but I prefer to employ for this purpose glass, while the holder is, of course, preferably formed of metal.

Having thus described my invention, what lf claim and desire by Letters Patentto secure is: t

1. An insulating device having in combination, a holder, a bushing formed of insu lating material in two parts .held by said holder, and an element located between the abutting surfaces of said parts.

2. An insulating device, having in combination, a holder, and a bushing formed of insulating material in two parts held by said holder, the abutting surfaces of said parts being cemented together, wherebysaid bushing constitutes a continuous unbroken ring.

3. An insulating device, having in combin'ation, a holder comprising two relatively movable parts, a bushing formed of insulating material formed in two parts held by said holder, an element located between the abutting surfaces of said lparts of said bushing,l

and means to impart a relative movement to said parts of said bushing, whereby said elel ment is compressed therebetween. t

4. An insulating device, having in combil nation, a holder, a bushing formed of insulating material formed in two parts held by said l holder, an element located between the abutwhereby said element'is-compressed therebetween. f

5. An insulating device,fhaving in combi-` nation, a holder comprising two relatively movable parts, a bushing formed oi'iinsulating material in two parts held by said holder, an element located between the abutting surfaces of said parts of said bushing, and means to impart a relative movement to said parts of said holder, said parts of vsaid holder in turn imparting a relative movement to said parts of said bushing, whereby said element is compressed therebetween.

6.'` An insulating device, having in' combi nation, a holder, a bushinglformed of insulating materal in two arts held by said holder, an element located etween the abutting surfaces of said parts, and means to secure said holder to a support.

In testimony whereof I have hereunto set my hand in. presence of two subscribing witnesses. Y

' BENJAMIN A. PoND.

Y Witnesses: l

LOUIS A. JONES,

SADIE V. MCCARTHYY.

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