US1246461A - Strain-insulator. - Google Patents

Description

B.A.'P1|MP10N.

STRAIN INSULATOR. APPLICATION FILE'D JUNE 28.19I7.

Patented Nov. 13, 1917.

2 SHEETS-SHEET I.

' B. A. PLIMPTON.

STRAIN xNsuLAToR.

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` APPL C 1917. v1,246,461 Patented Nov. 13, 1917.

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.is turned upon the insulator section, the

' locking ring 13 is also turned. In assemblin the parts, the cap is placed over the insu ator section with the locking ring 13 positioned thereon. Having rst spread the ends of the shoulder 7 of t e locking member v5, upon moving the cap downwardly upon the insulator section and then turning it to the right, the parts initially take the position shown in Fig. 5, where the ring 13 has just entered under the shoulder 7. Additional relative turning of the insulator section and cap carries the locking ring 13 farther under the shoulder 7 until it reaches the position shown in Fig. 6 where the ring 13 is almost entirely engaged with the shoulder. A. very slight- J.urther turning movement, after the parts are positioned, as in Fig. 6, brings the two locking rings into coincident position, with the ring 13 underneath the flan e 7, as shown in Figs. 1 and 3. Upon re easing the ends of the locking ring 5, the spring action of the latter returns them to the normal position illustrated in Figs. 1, 3 and 7. The flange 7 is substantially continuous and adords practically a continuous engaging `surface for holding the locking ring 13, which cannot be removed .without considerable diiiiculty, after it is once locked in place.

I claim as my invention:

1. The combination with an insulator section having a separable locking member thereon embodying a locking shoulder, of a cap coperating with the insulator section and carrying a locking device thatv is brought into engagement with said shoulder by being threaded on the insulator section.`

2. The combination with an insulator secjtion having a metallic locking member thereon embodying a locking shoulder, of a capcoperating with the insulator section and carrying a locking device that is brought into engagement with said shoulder by being threaded on the insulator section.

3. The combination with an insulator sectionhaving a separable split locking meinlator section and carrying a locking device' that is brought into engagement with said shoulder by being threaded on the insulator section.

5. The combination with an insulatorsec-` tion having a separable split locking member thereon including a shoulder which is substantially continuous when in normal locking position, the ends of which shoulder can be spread to forni a thread, of a cap cooperating with the insulator section and carrying a locking device in the form of a split ring that is brought into engagement with said shoulder by threading it thereon when the ends are spread.

6. The combination with an insulator section having a reduced portion affording a shoulder, of a split locking member arranged ,in said reduced portion normally resting against said shoulder and itself provided with a substantially continuous shoulder, the ends of which can be spread to form a thread, of a cap cooperating lwith the insulator section and carrying a locking device in the form of a split ring that is brought into engagement with said continuous shoulder by threading it thereonwhen the ends are spread.

7. The combination with an insulator sec tion, of a cap, and locking means, ior holding the cap on said insulator section coin- Erising coperating split rings, one carried y the insulator section and the other by the cap, the ends of which rings are separable by spreading to afford threads whereby the cap may be threaded on the insulator section.

BENTLEY A. PLIMPTON.

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