Patent Model - Improvement in Brick-Machines
Maker and role
John Thomas, Patentee
Jul 08 1873
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Wood, brass, iron, steel
11 1/2 x 8 5/8 x 4 1/8" (29.2 x 21.9 x 10.5cm)
Thomas claims four parts to his invention, the first being "a mold-cylinder having diametric mortises the length and breadth of a brick in their transverse section, and containing plungers which move the distance of the thickness of a brick or more in the mortises, so as to alternately present a cavity on the opposite sides of the cylinder to receive the clay, which is pressed therein by a follower, whose entrance and pressure of the clay drives the plunger forward and expels the previously-pressed brick from the other side, the cylinder taking semi-rotation between the movements of the follower." (Patent Number 140,742)
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