1851 Great Exhibition: Official Catalogue: Class IX.: John Whitehead
From Graces Guide
239. WHITEHEAD, JOHN, Preston, Lancashire — Inventor and Manufacturer.
A machine for the manufacture of draining-pipes and tiles, with screening apparatus for separating stones and roots from the clay. It will make pipes or tiles of any form or size, from 1 to 15 inches in diameter, and of any length to 27 inches.
New machine for making and pressing bricks.
Drain-pipe and tile-machine, with a clay-box at each end, so that tiles may be made at one end and clay screened at the other, or vice versa.