US107232A - Improved roofing-compound - Google Patents

Description

annex sans pawn can,

JOSEPH V. DOUGLAS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND JAMES A.'oRAIe, or SAME PLACE.

Letters Patent No. 107,232, dated September 13, 1870.

iMPROVED ROOIING-I ZOMPOU'N D.

the Schedule referred to in these Letters Patent and'making part of the same To all whom it may concern Be it known that I, Josnrn V. DOUGLAS, of the city and county of Philadelphia and State of Pennsylvania, have invented'a new and improved Roofing- Oomposition andI do hereby declare that the following is a full,clear, and exact description. of the same.

My inventionrelates to preparations for making a water-proof roof, and consists in a compound formed of iron scales, which are produced principally in rolling-mills by the combined action of heat and pressure, and united to such a proportion of tar, or other water repellant, as will firmly connect and cohere said scales, and produce a uniform and homogeneous coating over the roof. These scales possess two peculiar characteristics not observable in filings, turnings, or

other waste. of iron,,namely, that theyare nearly unoxydizable by moisture, and require a much higher degree of temperature to melt them than other ir'on oflal.

The scales and tar may be oonjointly employed in any suitable way, as my invention does not consist in the manner of applying this c0mponnd,"but in the thing itself, however applied.

The mode which I preferably employ, at the present .t-ime, is to mix the scales intimately with hot liquid tar. and apply it directly to the roof in one' or more coats, as may seem desirable. The scale will naturally fall into place and exhibit an incline corresponding to the pitch of the roof.

Iron borings, turnings, filings, and pulverized ore have been employed and patented heretofore in-combination with various other ingredients, but they lack the form and peculiar adaptation to the purpose in view, which is possessed by the principal article in my compound. r I

The first three curl up; have a tendency to stand erect on their transverse edges,'and cannot be made to lie smooth upon the facev of the roof. This constitutes a very serious objection to them. Under these circumstances, they form slight ridges in which the water rests, and is afl'o'rded an opportunity to work through. The ground ore is granulated, and, conse: quently, open to the same objection as sand, namely,

that it will be gradually washed .out bythe operation of heavy rains, while the atoms or pieces do not present a continuous slope to shed the water. v

These rolled scales are so condensed by heavy pressure as to have a high specific gravity, and to He in sheets like slate or shingles. The water is thus enabled to pass freely without any obstruction over the smooth surface formech Having thus described all that is necessary to a clear understanding of my invention,

\Vhat I claim as new, and desire toprotect by Letters Patent, is:-

-A surface coating for roofs, formed of rolled iron 1 scales, applied in hot liquid tar and in one or more successive coats, as set forth.

- JOSEPH V. DOUGLAS.

\Vitnesse's .ALnx. Convnmn, B. F. JARRETT.