US465888A

US465888A - Island

Info

Publication number: US465888A
Authority: US
Publication date: 1891-12-29
Anticipated expiration: 1908-12-29

Description

(N0 MmlelA T. L. REED. COVERED ELECTRIC CONDUCTOR.

No. 465,888 Patented Dec. 29. 1891.

mvemon W W xi @aa WITNESSESZ ATTORNEY UNlTED STATES PATENT OFFICE.

THOMAS l.. lildldl'), ()l PROVIDENCE, RllOllF ISLAND.

COVERED ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 465,888, dated December 29, 1891.

Application filed November 18,1390. Serial No. 371,834. (No model) To all whom, it may (IO/100171.

Be it known that I, THOMAS L. REED, of l rovidence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Covered \Vire; and I do'hereby declare that the fol lowing is a full, clear, and exact description Strands are held and covered on both their inner and outer surfaces by strands braided in the usual way, the object in combining the longitudinal strands with the braided ones being to avoid the stretchiness, so to braid and which are not easily detected. It

. .is illustrated in the accompanying drawing.

- Figure 1 is a representation of a piece of wire or cable with the improved covering, the strands being made wide apart to show their relative positions and directions, instead of being drawn close together, so as to make a close. covering, as is done in practice. Fig. 2 shows a cross-section of the covered wire or cable taken on dotted lines .2, Fig. 1. Fig. $5 is a part of a diagonal section taken across between two of the threads 0 c on line a: :r, Fig. 1. g

In Fig. 1 one set of the braided strands that run in one direction around the wire s are marked cc, andthose strands that pass around in the other directionare marked 0' 0. These two sets are braided over the wire in the usual way. The warp or lengthwise strands (e a are placed intermediate between the two sets of braided strands c 1:, where they cross each otherin the process of braiding. The order of the strands in the operation is as follows: One of the strands passes, say, first under one of the strands c, with one of the strands a between the two. Then the same strand c passes over the next strand v, with another of the strands a between the two strands, crossing as before, and this order of the strands a strand 0 passing altcrnatel y over strands c, with a lengthwise strand a between them where they erossis continued through the whole covering. By this it will be easily seen that as there isal waysac strand or a c strand under and over the strands a where they cross the strands a will bestraightin the direction of the length of the wire. This combination has a great advantage over the usual braided covering, or even the woven covering, as these straight strands a receive the initial strain of any force exerted on the wires in the direction of its length and add their strength to that of the wire to resist breaking, and as there are a number of them the additional Strength thus afforded to the wire is very great.

As before mentioiied, the diagonal position of the usual braided strands allows them to stretch and prevents them from affording this resistance to the tensile strain, and a woven covering has its warp-strands bent in and out more or less in passing under and over the filling-thread, which prevents these warp-strands from being straight and gives them a certain amount of stretch when drawn on lengthwise, and this straight position of. the lengthwise strands a, not being required tobcnd to accommodate the braided strands, enables me to use a stiffer, harder, and less yielding material with greater strength for that purpose.

Even common wire can be used to form the lengthwise strands where'there is no objection to partially-metallic covering. The number of strands a may be more or less, as it may be found best, as it is riot necessary 10 Pllii 0m! heme-(ll crossing of the strands not braided inclosedbeiween-the two st muds c c. sets of braided strands, substantially as set Having thus descvibqd my improved coverforth.

ing, I claim as my iuvgngiqn THOMAS L. REED. 5 As a new article f manufacture, a wire for \Vitnesses:

elcctrigal purposes having a covering com- E. B. READ,

posed of braided sttands. and straight wire- BENJ. ARNOLD.