Section 101.—DRAWING AND ROLLING METALS, &c.
(See also [p. 234].)
[2581]. Bending block, for bar iron.
Section 106.—DOORS, MANHOLES AND COVERS.
(See also [p. 242].)
[2582]. Screw plug, with two lugs to screw it up by a plain bar placed between them.
[2583]. New form of manhole door.
[2584]. Screw fixing for a plug, door, or valve, quickly released or secured.
[2585]. Hollow plug, with square recess for a key or spanner. Flush plug.