US2829192A

US2829192A - Electric insulators

Info

Publication number: US2829192A
Application number: US331054A
Authority: US
Inventors: Nield Douglas
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-01-13
Filing date: 1953-01-13
Publication date: 1958-04-01
Anticipated expiration: 1975-04-01

Description

A ril 1, 1958 D. NIELD 2,829,192

ELECTRIC INSULATORS Filed Jan. 13, 1953 HGJ. L2

United Stats Pat ELECTRIC INSULATORS Douglas Nield, Cardiit, Wales Application January 13, 1953, Serial No. 331,054

3 Claims. (Cl. 174-168) This invention comprises improvements in or relating to electric insulators of the bobbin or spool type, and has for its object to provide an insulator made from a plastic which is flexible and easily manufactured and in which is provided a comparatively long leakage path, whilst at the same time means are provided for retaining the electric conductor in the insulator without the usual wiring or clips.

Referring to the accompanying drawing:

Figure 1 is a plan view of an insulator according to this invention, partly in section.

Figure 2 is an underside plan of the insulator shown in Figure 1.

Figure 3 is a side elevation of an insulator according to this invention, and

Figure 4 is a side elevation of the insulator shown in position of use supporting a conductor.

Referring to the drawings the insulator may be moulded from polythene or poly vinyl chloride or like plastics, which when sufliciently thin are flexible.

The insulator which is of a bobbin or spool shape is formed with a groove 1 therein, which groove is of a comparatively deep nature so that the

sides

2, 2 of said groove are flexible, thus when a certain amount of side strain is placed on a conductor 3 (Fig. 4-) located in the groove 1 the

sides

2, 2 will flex instead of taking the strain, furthermore, an insulator according to this invention provides a long leakage track, owing to the comparatively large amount of surface which is provided on the

sides

2, 2 of the groove 1.

Formed integral with a face 2 of the insulator is a boss 4 which forms a distance piece between the main part of the insulator and the part (e. g. a port 5, Fig. 4) to which the insulator is secured by means of a screw or bolt 6 or the like which passes through an axial hole 7 in the insulator and boss.

2,829,192 Patented Apr. 1, 1958 ice Moulded on one or both of the

sides

2, 2 of the groove 1 are projections 8 which are undercut at their inner ends which are adapted for retaining the conductor 3 in position on the insulator without the necessity of wiring or otherwise securing the conductor 3 thereto.

The conductor 3 is passed over the top of the projection 8, the sides 2 being flexible readily allow this operation to be effected.

This insulator is particularly adapted for the support of a conductor on electric fencing or any other post where it is desired to support the conductor on insulators of the bobbin or spool type, or said insulators may be secured to a wall or the like, or threaded onto a rod fencing post.

I claim:

1. A plastic bobbin-type electric insulator having comparatively long thin flexible walls which form a comparatively deep groove for a conductor and a projection carried by one of the said walls and nearly spanning the groove to a point adjacent the opposed wall of said groove, which projection acts as a means for retaining a conductor in the groove or the insulator.

2. An electric insulator according to claim 1, wherein the projection is undercut on its inner end to accommodate an electric conductor.

3. A plastic bobbin-type electric insulator having comparatively long thin flexible walls which form a comparatively deep groove for a conductor, a projection integral with one of the walls Within the groove and nearly spanning said groove to a point adjacent to the opposed wall of said groove, which projection acts as a means for retaining a conductor in the groove of the insulator, and a boss integral with the rest of said insulator and which serves as a distance piece between the rest of the insulator and the element on which it is mounted.

References Cited in the file of this patent UNITED STATES PATENTS 415,504 Fowler Nov. 19, 1889 823,820 Steinberger June 19, 1906 879,068 Steinberger Feb. ll, 1908 927,321 Bond July 6, 1909 1,174,002 Ettinger Feb. 29, 1916 1,656,032 Birkholtz Jan. 10, 1928 2,424,687 Greene et al. July 29, 1947 FOREIGN PATENTS 677,785 Great Britain Aug. 20, 1952