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168,472 · Foley · "Improvement in Vault-Lights" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

168,472: 2 of 3

iron by which the plug is operated, I make a stout rim around the lower end of the plug; but this rim does not perform any of the functions of a screw-flange, because it is not inclined, and it does not or should not touch the internal projection a' at any time. I have in the drawings marked this lower rim or flange B²; and the recesses thereon, which receive the iron T, allow the passage of the rim past the internal projection a' in entering the plug into its hole.     The upper face of the plug is rounded or convex. The lower face may be similarly convex, or otherwise formed, as convenience and economy may dictate.     I claim as my invention--     1. A vault-light having an overhanging head, B¹, and a body, B, having its surface formed with two or more volute curves, m m, as and for the purposes herein specified.

2. The circular groove in the body B, adapted to receive the inner edge of the packing C and hold it centrically, in combination with the overhanging head B¹, and with the curves m m below, adapted to lock the glass in the iron frame, as herein specified.     3. The glass B B¹, having a ridge or projection, b', on the under surface of the head, adapted to serve in combination with the soft packing C, and with the volute or equivalent locking-curves m m on the body B, as and for the purposes herein specified.     In testimony whereof I have hereunto set my hand this 13th day of August, 1875, in the presence of two subscribing witnesses. JOHN F. FOLEY. Witnesses:     E. G. THOMPSON,     J. K. OULAHAN.