US2037543A

US2037543A - Electric cable

Info

Publication number: US2037543A
Application number: US7466A
Authority: US
Inventors: Charles E Seaberg
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1935-02-21
Filing date: 1935-02-21
Publication date: 1936-04-14
Anticipated expiration: 1953-04-14

Description

April 14, 1936.

C. E. SEABERG ELECTRIC CABLE Filed Feb. 21, 1955 InvenCQr: Charles E. Seaberg,

is Attorney.

Patented Apr. 14, 1936 UNITED STATES PATENT OFFICE ELECTRIC CABLE New York Application February 21, 1935, Serial No. 7,466

2 Claims.

more particularly to a low voltage supply cable for outdoor use.

The object of my invention is to provide an improved cable for low voltage supply which is highly resistant to atmospheric conditions, has increased flexibility and will withstand hard usage.

What I consider to be novel and my invention Will be better understood by reference to the fol lowing specification and appended claims when considered in connection with the accompanying drawing, in which the single figure is a plan view of my cable with layers of insulation cut away to expose the layer beneath.

Referring to the drawing, l0 indicates an electric conductor which, as shown, is a solid copper wire though it may be stranded. Over the condoctor [0, a layer of rubber insulation H is provided. Over the rubber a fibrous braid i2 is located. Braid I2 is impregnated with a weather proofing material. A paper tape I3 is wound spirally over the braid l2. A second conductor M consisting of a large number of small diameter strands is Wound with a long pitch spiral over the paper tape [3. The paper tape l3 beneath the stranded conductor It serves to protect the insulation from injury upon the bending of the cable which might result due to the compression of the strands on the under side of the bend which would cut into the insulation and thus reduce the insulation between the two conductors l0 and M which might result in a breakdown of the cable. In addition, the paper tape beneath the stranded conductor l4 permits relatively free movement of the conductor It with respect to the remainder of the cable. This increases the flexibility of the cable. Over the conductor M a paper tape I5 is wound spirally completely covering the conductor It. Over the paper tape l5 a braid N5 of fibrous material is provided. Braid I6 is impregnated with a weatherproofing and fire resistant material I! such as pitch or the like which permeates the braid [6 My invention relates to electric cables, and

and covers the paper tape IS. The paper tape, l5 prevents the weatherproofing compound I! from covering the conductor M which would interfere with the connecting of the conductor to the circuit and would require that the compound ll be washed away by a solvent or scraped from the strands of the conductor. In addition, the paper l5 increases the flexibility of the cable by preventing the sticky compound and the braid l6 from tightly engaging the conductor l4 and limiting the ability of the conductor to slide or slip within the cable upon the bending of the cable. It may be found desirable in some cases in which less free movement of the conductor i4 is required to impregnate either tape l3 or E5 or both of these paper tapes with a sticky substance which will not interfere with the conmeeting of the cable to a circuit but will somewhat limit the movement of the conductor I 4 within the cable.

From the foregoing, it may be seen that an improved cable is provided which is highly resistant to atmospheric conditions which is flexible and easy to install or connect to a supply circuit.

What I claim as new and desire to secure by Letters Patent of the United States, is:-

1. An electric cable comprising a conductor, a rubber covering over the conductor, a fibrous braid over the conductor, a layer of paper over the braid, a conductor wound spirally over said layer of paper, a second paper layer over the conductor, and an overall fibrous covering impregnated with a weatherproofing compound.

2. An electric cable comprising a conductor, a rubber covering over the conductor, a fibrous braid over the rubber, a paper tape wound spirally over the braid, a stranded conductor wound spirally over the paper tape, a second paper tape wound spirally over said last-named conductor, and a fibrous covering over the second paper tape impregnated with a weatherproofing compound.

CHARLES E. SEABERG.