US926868A - Woven fabric. - Google Patents

Description

R. A. HAMMOND.

` WOVEN FABRIC. APPLICATION FILED SEPI-2.5. 190B.

Patented July 6, 1909.

UNITED STATES PATENT OFFICE.

ROBERT A. HAMMOND, OF SANDWICH, MASSACHUSETTS.

WOVEN FABRIC.

Specification of Letters Patent.

Patented July 6, i909.

Application led September 5, 1908. Serial No. 451,866.

of January 15, 1907, in which a series of parallel, longitudinal strands, each composed of a plurality of wires twisted together and served with marline, are united by similar transverse strands interwoven with them. Such devices possess well recognized merits with regard to strength, durability, and frictional transmitting capacity, but also have certain disadvantages. For example,v the patentees wires making up I n n n each strand, because of thelr twlst, incur acompound bending `action across their com- Eanions which -is liable to result in their reakage; the roughness of the twisted surfac'eto some extent `cuts the covering; and the sharply rounded surface of the longitudinal strands produces intermediate depres-v sions Which decrease the effective frictional surface.

The objectl of the present invention is to overcome these difficulties, and to providek a still more durable and efficient device.

In the accompanying-drawing forming a part of this specification, Figure 1 is a front elevation of a ortion of one embodiment of my invention; ig. 2 is a longitudinal section therethrough on the line 2--2 Fig. 1; and

' Fig. Sis an enlarged transverse section on the line 3-3 of Fig. 1.

Similar characters are applied to like parts in the several figures of the drawing.

The letter A designates a member extending longitudinally of my improved tension device, and consisting of a central portion or core 10 and a covering 11. The core is pref-,

erably provided by a flat wire, of any desired metal, and which is in. section of the eneral form of a arallelogram; that is, having opposite para lel plane surfaces 10a-40a and symmetrically disposed ends IOL-10b, which are, however, slightly curved so that 1 they merge gradually into the plane surfaces.

One dimenslon of this section, that between the curved ends, is greater than any other transverse dimension of the wire. The covering 11 may be of any suitable yieldable material, but is preferably of a fibrous character and waterproof. M arline Wound closely over the wire is excellent i" or this purpose. The longitudinal strands A are arranged in a series side by side, usually in a single layer, with their maximum dimensions or diameters lying in the same plane across the width of the device, and with the curved surfaces of adjacent strands in proximity to 'one another.

The strandsA are maintained in their correct relation to form a flat rope or belt, b'y transversemembers or strands B interwoven with them, and each conveniently consisting of a core 12 of single round wire, having a covering 13 of the same material as the longitudinal strands. The manner in which I prefer to weave together or connect the members is clearly shown in the drawing, where it will be seen that there are two of the transverse strands crossing the device in opposite directions, and passing upon opposite sides of successive strands A. In the crossing the strandsB parallel one another, with their intersections at the outside ol the devlce adjacent to thev outer members A. The retaining strands are thus protected from wear by the longitudinal strands, the latter wholly furnishing the working or friction surface. Moreover, the intersection ot the cross strands at the edge of the device adds to its thickness only that of a single strand, and these cross strands are not forced against and do not wear one another.

Obviously, the devicepresents a large portion of its totalarea for contact with a pulley or like member, for not only do the flat Wires furnish considerable uninterrupted friction surface transversely of the device, but the space between their curved edges is so slight that in use it is so filled by the covering that the surface is practically continuous. In

neither set of strands are there sharp proj ections to cut the covering, and the fact that each strand contains vbut one Wire, bending always in the same direction over a pulley,

reduces the tendencv of the metal to crysbelt for the transmissiona of power and like purposes comprising longitudinal strands of wire having flat working faces, transverse retainin Wire strands interwoven With the longitudinal strands and crossing the flat faces thereof, and a covering of yieldable material enveloping each of the strands.

2. A. fabric adapted for use as a-rope or belt for the transmission of power and like pnrposes comprising longitudinal strands of vwlre having fiat Working faces of greater width than the thickness of the wire, interwoven transverse retaining strands, and a covering of yieldable material enveloping each of the strands.

3. A flat rope or belt comprising longitudi nal strands having flat working faces and curved edges adjacent to one another in successive strands, interwoven retaining strands crossing said nat races and passin between the curved ed es, and a covering o yieldable material enve oping each of the strands.

4. A fabric adapted for use as a ro e or belt for the transmission of ower an like purposes comprising 'longitu 'nal strands of Wire having flat Working faces, and transverse retaining strands interwoven Withthe longitudinal strands, all the strands of the fabric presenting asurface of yieldable mav teiial for contact with the associated strands. Sivned at'Boston, in the county of Suffolk and tate of Massachusetts, this Ythird day of September, 1908.

ROBERT A, HAMMoND.

Witnesses: f

ROBERT T. BRADY, Lor'rin CURRIE.

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