US1631A - Peter nayloe - Google Patents

Description

o como oeQOooooOOQ ooOoQoQo 00006 OO o Qoo ing, A, A, is a root of metal represented as Ifollowing is a full and exact description PETER NAYLOR, OF

NEW YORK, N. Y.

MODE OF SUPPORTING METAL ROOFS.

Specification of Letters Patent No. 1,631, dated June 12, 1840.

thereof.

In Figure 1, 1n the accompanying drawcomposed of sheets united together by riveting, and bent so as to form a series of parallel arches. The metallic roofing may, however, be made in other forms, as my plan of support is independent of the particular shape given to the metal plates constituting the covering. B, B, are iron truss beams placed above the roof, and spanning across the same so that their ends may rest upon the side walls. The upper portion, or arched part, a, a, of these beams I make of cast iron, in any convenient number of pieces which may be united together by screw bolts, in the ordinary way, the ends of the different pieces butting against each other, that they may properly sustain the thrust to which they are to be subjected. The chord pieces Z1, b, are to be of wrought iron, which is to be acted upon by tension alone. These chord pieces may be made in one or more parts; when more than one piece is used the parts are to be secured together by eyes and keys or bolts. These wrought iron chord pieces must be firmly connected at their ends with the cast iron arch pieces. The former should be turned up at each end so as to constitute shoulders, which are, to operate as abutments within which the ends of the arches are received. Intermediate arch pieces c, c, c, of wrought or cast iro-n, are

placed between the arch andk string pieces along the whole beam; or, instead of arches, the pieces c, c, c, may be formed into circles, ovals, or otherwise. f

To sustain the roof upon the suspension principle, there are wrought iron rods, or bolts, e, c, e, which pass through suitable holes in the arch, the string pieces, and the roof plates, said bolts having heads whichV rest upon the arch pieces, and being furnished with screw nuts at their lower ends,

which are tightened beneath the roof plates, there being ilat iron support plates, which operate as washers, and bear against thev under side of the roof plates, as shown at al, Fig. P By the aid of these truss beams so placed, the metal rooiing will be sustained entirely from above,without beams, props, posts, or other devices being used in the apartment which they cover.

Having thus fully explained the nature of my invention, and shown the manner in which I carry the same into operation, what I claim as constituting my improvement, and desire to secure by Letters Patent, is-

The combining of iron truss beams, constructed in the manner herein described, with the plates constituting the metallic rooting, said truss beams being placed above the roong, and sustaining the same upon the suspension principle, substantially as set forth.

f PETER NAYLOR. lVitnesses GEORGE STEVENS, K. S. VAN Vocal-11s.

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