US1238768A - Insulator. - Google Patents

Description

G. (T. HULL.

INSULATOR. V APPHCATHEN. HLEb MAR. 3, 19H- Patented Sept. 4, 1917.

GREGORY C. HILL, OF VICTOR, NEW YORK.

INSULATOB.

Specification of Letters Patent.

Patented Sept. 4, 191 '7.

Application filed March 3, 1917. Serial No. 152,207.

To all whom it may concern:

Be it known that I, GREGORY G. HILL, a citizen of the United States, and resident of Victor, in the county of Ontario and State of New York, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

The present invention relates to insulators, and more particularly to the type in which a plurality of elements or members are connected together in such a manner as to resist the strain or tension thereon tending to separate them, an object of this invention being to provide an improved construction in which a durable locking element is provided which may be positioned between the members of the insulator after the insulator members have been fitted together.

To this and other ends, the invention consists of certain parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings Figure 1 shows an insulator, partially in side elevation and partially in axial section, embodying the present invention;

Fig. 2 is a perspective View of the locking ring between the insulator cap and the mem ber formed of insulating material;

Fig. 3 is a perspective view of the locking ring or sleeve which connects the central pin with the member formed of insulating material; and

Fig. 1 is a detail view showing the mannor in which the locking rings prevent turning movement between the different members of the insulator.

The invention is shown as embodied in an insulator of the type in which there is employed a suspending bell or cap 1 having a pocket receiving the central projection 2 of an insulating member 3 which in turn has a central opening orpocket in which the strain bolt 4 is secured. It is understood, however, that the invention is not limited to use in this type of insulator, but may be used in any insulator where it is desired to connect two elements or members, one at least of Which is made of insulating material.

In the present embodiment the central portion 2 of the insulating member 3 has an annular groove 5, and its diameter is such that it may be fitted readily within the cap or bell 1. The mouth of the cap or bell 1 preferably has an inwardly-extending rib 6 forming an upwardly-preterior wall of the bell or cap 1 so as to move the locking device axially in the manner to be hereinafter described.

The locking device, which is shown in perspective in Fig. 2, embodies a ring 9, preferably split at 10 in order that it may be compressed so as to be introduced within the ell or cap 1 prior to. the introduction of the insulator projection 2. The meeting ends of the ring are preferably formed one with a projection 11 and the other with a notch 12, so that after the ring has been expanded within the bell or cap 1 its ends will be held against relative movement. This ring 9 is preferably slitted at 13 to provide a plurality of tongues 14, the metal ofthe ring being cut or recessed at 15 to the bases of the tongues in order to weaken the tongues at this point so that they may more readily bend. After the ring 9 has been fitted within the cap or bell 1, and the projection 2 has been introduced into the bell or cap 1, the parts occupy the positions shown in Fig. 4. A chisel or other tool introduced through the slots 8 is now employed'for driving the locking ring 9 in an axial direction. This brings the outer faces of the tongues 14 in contact with the inclined faces 7 on the bell or cap 1 and bends the tongues 14 at the points 15, thus causing the tongues to enter the groove 5 and cooperate with the shoulder 16 forming the upper wall of said groove 5. By this arrangement, the insulating member 2 is held against withdrawal from the cap or bell 1. In order to prevent the insulating member 2 from turning in the cap or hell 1, the locking ring is slitted at 17 to provide two tongues 18 and 19. One of these tongues, namely, tongue 18 is bent inwardly, as shown in Fig. 4, into the notch in the projecting portion 2 of the insulating member, while-the other tongue 19 is bent outwardly, as shown in Fig. 4, into one of the slots 8 of the cap or bell 1. By this arrangement, the tongue 18 holds the ring 9 and the insulating member 2 against relative movement, while the tongue 19 holds the cap or bell 1 and the locking ring 9 against relative movement.

For securing the strain pin 4 to the insulating member 23 the latter is provided, as usual, with a central opening or pocket, and this opening or pocket is enlarged at its inner end by a groove 21, the lower wall 22 of which forms a shoulder. The strain pin 4 has a diameter which is materially less than that of the diameter of the opening or pocket of the insulator 23, so that when the strain pin is in position in the pocket a space is provided about the pin. The inner end of the pin is also enlarged at 23 to provide an inclined shoulder 24, the enlargement being such that it may be readily introduced into the pocket of the insulator 2-3. To secure the insulating pin within the pocket of the insulator 23 a locking ring 415 is employed, this ring being split at 26 and having a tongue 27 at one of its ends extending into a notch 28 at the other end to provide an interlocking connection between the ends of the ring. .By splitting the ring it may be forced over the enlarged end 23 of the strain pin 4. That end of the ring in proximity to the enlargement 24 is slit at a 29 at intervals to provide tongues 30, at the bases of which grooves 31 are to weaken the tongues in order that the latter may be bent readily outwardly.

In connecting the strain pin to the insulator 2-3 the split sleeve 25 is first fitted over the strain pin, after which both the split ring and the strain pin are introduced into the pocket of the insulator A suitable tool is then engaged with the lower or exposed end of the locking ring 25 so as to force the ends of the tongues 30 against the inclined shoulder 24, and in this way bend said tongues on the lines 31 so as to make them lie between the shoulder 24 and the shoulder 22, thus preventing the withdrawal of the strain pin 4 from the insulator.

I In order to prevent the turning of the strain pin within the insulator, the split sleeve 25 is provided at its lower end with a number of slits 32 forming tongues 33 and 34, respectively. The tongue 34 is bent inwardly, as shown in Fig. 4, into a notch 35 in the strain pin, while the tongue 33 is bent outwardly into a notch 36 in the insulator there has been provided an insulator inv which at least two members are employed, one with a pocket receiving the other, and at least one having a shoulder arranged to be engaged by bendable tongues on a ring, means being provided for bending said tongues into engagement with the shoulder when the ring is moved axially between the two members. This arrangement makes it possible to unite the elements of an insulator without the use of cement and without the use of complicated. devices which are liable to break easily or get out of order, or cause the breakage of the insulating element of the insulator.

What I claim as my invention and desire to secure by Letters Patent is '1. In an insulator, two members one of which has a pocket receiving a portion of the other, at least one of said members being formed of insulating material and having an annular shoulder, a ring arranged to move axially between said members after the latter have been fitted together and having a plurality of bendable tongues, and means for bending said tongues on said axial movement of the ring to move the tongues into engagement with the annular shoulder so that the two insulating members may be held togetherf 2. In an insulator, two members one of which has a pocket receiving a portion of the other, at least one of said members being formed of insulating material and each of said members having an annular shoulder, and a ring arranged to move axially between said members after the latter have been fitted together, said ring having a plurality of bendable tongues which engage the shoulder on one of said members on said axial movement of the ring to move the tongues into engagement with the other shoulder so that the two members may be held together.

3. In an insulator, two members one of which has a pocket receiving a portion of the other, at least one of said members being formed of insulating material and each of said members having an annular shoulder and also a recess, and aring arranged to move axially between said members after the latter have been fitted together, said ring having a portion which will engage the shoulder on one of said members on said axial movement of the ring to move said portion into engagement with the other shoulder so that the two members may be held together, said ring also having tongues adapted to be deflected into the recess in the move axially between said members after the latter have' been fitted together, said ring being split and having the ends of the split portion interlocking to prevent relative movement between the ends during the axial movement of the ring, and means for bending a portion of the ring on the axial movement of the ring to move said portion into engagement with the annular shoulder so that the two insulator members may be held together.

5. In an insulator, two members one of which has a pocket receiving a portion of the other, at least one of said members being formed of insulating material and each of said members having an annular shoulder, and a splitvring arranged to move axially between said members after the latter have been fitted together, the ends of the split portion of the ring interlocking to prevent relative movement between said ends during the axial movement of the ring, and said ring having a portion which engages'the shoulder on one of said members on the axial movement of the ring to move said portion into engagement with the other member so that the two members may be held together.

6. In an insulator, an insulatormember formed of insulating material and having a pocket enlarged annularly to provide an internal shoulder, a strain pin fitted in said pocket and having an enlarged end of a size to permit its introduction into the pocket, there being provided a space between the pin and the wallsof the pocket when the pin is fitted in the pocket, an axially movable ring arranged in the pocket about the pin in the space between the latter and the walls of the pocket and said ring having a portion lying in the enlarged portion of the pocket between the shoulder formed by the latter and the shoulder formed on the enlarged portion of the pin.

7. In an insulator, a cap member with an internal annular shoulder, an insulating member having a portion received within said cap member and provided with an external shoulder, a ring arranged to move axially between said members after the lat ter have been fitted together, said ring having a portion adapted to engage the shoulder on the cap member on said axial movement to deflect said portion with reference to other portions of the ring into engagement with the other shoulder so that the two members may be held together.

8. In an insulator, a cap member with an internal annular shoulder, an insulating member having a portion received within said cap member and provided with an external shoulder, and a ring arranged to move axially between said members after the latterhave been fitted together, said ring having a plurality of bendable tongues which engage the shoulder on the cap member on said axial movement of the ring to move the tongues into engagement with the shoulder on the insulating member so that the two" members may be held together.

9. In an insulator, a cap member with an internal annular shoulder, an insulating member having a portion received within said cap member and provided with an external shoulder, a split ring arran ed to move axially between said members a er the latter have been fitted together, said ring having interlocking means at its ends to prevent relative movement between said ends on said axial movement and said ring having a portion which will engage the shoulder on the cap member on the axial movement of the ring to move said portion into engagement with the shoulder on the insulatin member so that the two members may be hel together.

10. In an insulator, two members one of which has a pocket receiving a portion of the other, at least'one of said members being formed of insulating material and having an annular shoulder, a ring arranged to move axially between said members after the latter have been fitted together, said ring having a plurality of bendable tongues connected thereto by weakened portions, and

. means for bending said tongues at the weakened portions on said axial movement of the ring to move the tongues into engagement with the annular shoulder so that the two insulating members may be held together.

11. In an insulator, a cap member with an internal annular shoulder, an insulating member having a central portion received within said cap member and provided with an annular groove, and a ring surrounding said central portion to one side of said groove and having portions extending into the groove and cooperating with the internal annular shoulder on the cap member to lock the two members together.

12. In an insulator, a cap member provided with an internal annular shoulder and also with openings in its wall, an insulating member having a central portion received within said cap member and provided with an annular groove, and a split ring receivable within the cap member to expand above the annular shoulder, said ring fitting about the central portion of the insulating memher at one side of the annular groove and having portions extending into the groove and cooperating with the internal annular shoulder on the cap member.

13. In an insulator, an insulating member tween the latter and the pocket of the inhaving a pocket provided with an enlargesulator and having a portion lying between 'ment forming an internal annular shoulder, the shoulder on the enlarged portion of the 10 a strain pin having a cylindrical portion pin and the shoulder formed by the enlarged 5 spaced from the walls of the pocket and an portion of the pocket of the insulating enlarged portion, and a split ring surroundmember. ing said cylindrical portion in the space bo- GREGORY C. HILL.

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