UNITED STATES PATENT OFFICE.
STEPHEN WATERMAN AND CHARLES LEARNED, OF CHARLESTON, SOUTH
CAROLINA. MACHINE FOR MOLDING AND PRESSING BRICKS.
Specification of Letters Patent No. 694, dated April 14, 1838.
To all whom it may concern:
Be it known that we, Stephen Waterman and Charles Learned, of the
city of Charleston, in the State of South Carolina, have invented
an Improved Machine for Molding and Pressing Brick; and we do
hereby declare that the following is a full and exact description
We usually mount the works of our press in a quadrangular frame,
A, A, A, Figure 1, in the center of which there is a vertical
revolving shaft B, which is to be turned by horse power, by means
of a sweep, or in any other way. Two arms C, C, extend
horizontally from the revolving shaft, carrying at their outer
ends pieces D, D, which are in the form of inclined planes on
their under sides, for the purpose of depressing the pistons E,
E, and the slides F, G, by means of which the brick is to be
pressed, the piston raised, and the brick carried off the piston
and slides are furnished with friction rollers on their upper
H is the pressing box, into which the clay passes from the mixing
tub, which is formed by the body of the machine; the shaft B
having knives upon it which are fixed obliquely, so as not only
to mix the clay, but at the same time to force it down and cause
it to enter the pressing box H, through an opening for that
purpose, a device well known in brick machines.
The pressing box is divided at bottom so as to supply molds for
the pressing of four, or any other convenient number of bricks,
at one operation, the follower, of course, being adapted in size
to the number.
The divisions at the bottom of the box are triangular bars, with
one angle uppermost for dividing the clay as it descends.
Under the pressing box there are ways I, I, made of stout timber,
as they are to sustain the force of the pressure, the mold being
laid upon them, immediately beneath the pressing box.
The piston E may be lengthened or shortened, by the aid of blocks
which may be inserted between its two segments, at o, o, and the
force of the pressure will be thus regulated. The inclined planes
D, D, as they pass over the piston E, cause it to descend and to
press the bricks, and immediately after freeing itself from this
it comes into contact with the top of the slide F, which slide
has a tappet J upon it, which comes into contact with the lever
K, forces it down and raises the piston E, the lower part of the
slide F, Figs. 2 and 3, is connected by a jointed piece with an
arm M, projecting from the horizontal shaft L, which it
consequently turns in descending, drawing back the arm M, which
is attached to a slide M1 on the ways I, I, Fig. 1, which serves
to bring the mold under the pressing box, and to carry it off
again when the bricks are formed. The inclined planes come into
contact with the slide G, immediately after its escape from the
slide F, and this by its descent serves to raise the slide F and
to operate the slide which carries the brick molds upon the ways.
The manner of raising the slide F, by the intervention of the
lever N, will be manifest upon inspection. As there is a
considerable amount of upward pressure upon the shaft B,
occasioned by the oblique position of the mixing knives, it is
necessary that it should have stout shoulders on the under side
of the collars within which its upper and lower ends work. The
two sides of the frame opposite to those shown in the drawing
contain a pressing box, piston, slides, and all the other devices
described, for performing similar movements at the same time.
The application of inclined planes to the forcing down the piston
for pressing brick in the manner described.
We do not claim the mixing, or press boxes, or the oblique
knives; these and other parts having been previously known and
used; all that we claim as our invention being the inclined
planes for forcing down the pistons, and slides, the particular
combination and arrangement of the two vertical slides, with
their connecting parts, for lifting the piston and causing the
molds to traverse upon the ways.
STEPHEN WATERMAN. CHARLES LEARNED.
Witnesses: Henry Goldsmith, Oliver M. Smith.