US1675421A - Covering for cables and the like - Google Patents

Description

Patented July 3, 192.8.

ALLEN D. rE'rTEE, 0E MOUNT VERNON, AND CARROLL :Ls 1 v NEW Yoax.

COVERING FOR CABLES THE LIKE.

Application filed July 2, 1927. Serial No. 203,001.

` This invention relates top improvements in coverings for cables and the like and aims to provide an expansible `and contract1ble sheath adapted to serve as an anchorage or reinforcement forcement or other suitable ireprooing or heat insulating material or other plastic coating. v f

The invention will be apparent from the following specification when read in connection with the accompanying drawings and the featuresof novelty will be pointed out with particularity in the appended claim. In the drawings- Fig. 1 showsl an electric cable having a covering embodying our invention- Fig. 2 is a similar view on a smaller scale showing the application of our covering to a cable having an enlarged joint;

Fig. 3 is an enlarged d tail showin our improved expansible and contractible s eath and the woven arrangement of the strands thereof.

Heretofore, the application of ireproong materials to lead covered cables and the like has always been a laborious process. Several methods are in vogue for applyin the materia1s,'most ofthem involving a te ious handwrapping operation. The common rope and cement .mortar combination involves the spiral wrapping of la. I inch hemp or fjute rope at a 1/1 inch spacing around! the cable to serve as a base and binder forthe cement mortar which is plastered on to a total thickness of Fys to 2% inches. Another type of binder used with cement mortar is a wire lath provided with clay buttons." This is wound on spirally in strips about 3 inches wide. It is not only a laborious process but the ends of the lath wires form a sourceof danger to the hands of the workmen. Another common fireprooing material is asbestos tape in various forms used either with or without a cement mortar. c A fourth method is the use of a cement mortar applied directly to the cable with a binding tape wound spirally around the outside. All of these prior practices involve a tedious handwrapping operation. 1

To overcome the inelicient and time consuming hand-wrapping of cables, we provide a sheath which is so woven that it can be readily eirpanded to permit its being easily and ,freely slipped over the cable orl an joints therein and then contracted by an end wise pull to hug the surface ofthe cable.

v spliced Our improved sheath S is of tubular stock-f HAW, OF'J'ACKSON HEIGHTS,

ably made of asbestos rope and the intersecting ends are bound together with twine as indicated at 14.

The diagonal arrangement of the strands causes the stocking-like tubular sheath S when compressed longitudinally, to expand or enlarge the diameter of the sheath and lenables it to be readily slipped over the end of the cable.

This expansible character of the sheath of particular advantage where a spliced or jointed cable is to be covered with fireproof cement.

Figure 1 shows a 'cable C a portion of which is covered with a layer of cement or ireprooiing compound F which is\ applied over the open-work sheath S. The left part of this figure shows the sheath expanded and illustrates how part of it can be slipped outfof the way'for the purpose of making a joint or splice in the cable.

Fig. 2 illustrates a cable which has been 'spliced at the enlarged joint J. `.The fireproofingcement F is adapted to cover the entire joint as well as the right half. of the cable but the same has been broken away and omitted in the drawing to show the manner 4in which the sheath VS fits snugly over the enlarged joint as well as the cable proper.

The woven sheath shown and described is of tubular or stocking-like form but I contgmplate also using a diagonally woven flat fabric on cables which have. been joined or prior to the time of covering with a fireproo ng coat. On such work, the flat mesh fabric will be wrapped about the cable and the edges drawn together and fastened by a suitable lashing cord. Y

While the ex ansible sheath has been shown and descri ed in connection with the reproofi, of cables, it will be readily understood It connection with the. application of heat in sulation material to pipes for `conve ing fluids, and enerally to the coating of ca les, pi es and t e like with plastic material.'

arious other modifications may be made by those skilled in the art without departing at the same can also be used in V from the invention as defined in the apbedded between said strands and surroundpended claim. ing said sheath.-

What We claim s:- In witness whereof, We have' hereunto 10 In Combination, a lead covered cable havsigned our names. 5 Ving :monter coverngcomprisng astocknglike sheath ofoppositely inclined interwoven ALLEN D. PETTEE. strands and a layer of reproof cement em- CARROLL H. SHAW.

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