a half-round portion, one side of which is tangent to the plane of the shingle and the other side of which terminates in a reversely curved portionThe turned bottom portion forming a gutter and the reversely curved portion thereof being engageable with a reversely curved top edge portion of a lower adjacent shingle to form a close fit there-between, a fastening tab integral with the shingle and extending from an upper corner of said shingle for securing the same to a roof structure, and a drain slot disposed in the gutter of said shingle for draining water therefrom, said corrugation ridges on the inner face of the shingle adapted to space said reversely turned top edge portion of the lower adjacent shingle from the inner face of saidMay 27, 1941.

Miller claims, inter alid, the following:

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'8. A shingle comprising a rectangular metal sheet having in its central portion a double fold dividing it into upper and lower halves, one half having a plurality of speaced transverse ridges embossed on its upper side dividing it into panels of three different widths, namely, a plurality of relatively small panels of the same width, a plurality of relatively large panels, each approximately twice the width of a small panel, and a plurality of panels of intermediate width, each approximately one-half wider than one of said small panels, the ridges being arranged so that adjacent panels are of different widths and large panels are at the ends of said half, and the other of said halves having a plurality of