N.PETERS, PHOTO-UTHOGRAPHER, WASHINGTON. DM.
N.PETERS, PHOTO-LITKOGHAPHER, WASHINGTON. D C.
irniTED STATES PATEKT OFFICE..
GATLORD V. HARPER, OIT FRANKLINVILLE, NEW YORK.
MACHINE EOR MAKING BRICKS.
Specification of Letters Patent No, 439, dated Octo'ber 33, 1837.
2'o all whom it may concern :
Be it known that I, Gatloed V. Hakfee,
- of Franldinville, in the county of Catta-
raugus and State of New York, have invent-
5 ed a new and useful Improvement in Ma-
chines, for Making Bricks, called " Harper's
Improved Brick Machine," which is de-
scribed as follows, reference being had to the
annexed drawings of the same, making part
10 of this specification.
For a double machine I make a platform
A about eight feet in length, five feet in
width and of any required thickness. On
this platform I fasten five pieces of scantling
15 B, each six and a half inches in depth and
three inches in width, placed parallel to
each other as far apart as the width of the
piston hereafter described. Over these and
near each end I frame a plank, C C, sixteen
20 inches in width and in length equal to the
width of the platform and of requisite thick-
ness to give it proper strength.
I make four pistons D D D D, each as
wide as the space between every pair of
25 scantlings, and between which they are
placed against anti-friction rollers repre-
sented by dotted lines at r at the sides-
said pistons being four feet, six inches in
length and about four inches in depth. On
30 the side of each piston is fastened a rack
E, into which a cog wheel F works for mov-
ing the same ; and into the end is bored
longitudinally an aperture covered at the
mouth by a swinging valve, G, opening out-
35 ward, or toward the clay, for preventing it
adhering to the piston on its return; — said
aperture being intersected by a cross aper-
ture H from one side of the piston to admit
air. See Figure 7.
40 I make forty eight bars I each six inches
in length, four in width on the outside or
toward the molds and half an inch in thick-
ness beveled on the side toward the piston s
and placed parallel and vertical as far apart
45 as the thicloiess of the brick or tile to be
molded and let into the before mentioned
plank above and the platform below, far
enough to give them the required strength,
either by dovetailed mortise and tenon, or
60 in any other suitable manner. The plank
and platform are also to be beveled, the
former on the under side u and the latter
on the upper side, v. I cut a horizontal
groove K in the plank an eighth of an inch
55 deep intersected by a vertical aperture from
the top in which is placed a funnel L for
supplying it with water to moisten the clay
and keep the bars always wet. The plat-
form is also channeled as at w, I likewise
form channels on the sides of the vertical 60
bars to communicate with the horizontal
groove before mentioned for conveying the
water to the clay and sides of the bars as
seen at x.
I make my molds with a horizontal plate, 65
M, upon which I raise vertical leaves N in
proportion to the required number of bricks
to be molded, which I place as far apart as
the size of the intended brick or tile.
I have two horizontal cog wheels, F F, 70
about ten inches in diameter placed on ver-
tical shafts working into the racks on the •
pistons. On these shafts I have two other
cog wheels P P each about thirty inches in
diameter, between which and working into 75
them is placed a small cog wheel Q of about
ten inches in diameter on a vertical shaft
extending above the frame about three feet,
having on its upper end a sweep, E, for
the horse to draw by. _ 80
I make use of two Imives S S for cutting
the clay into proper lengths for bricks or
tiles, one working between the molds and
bars and the other on the outer side of the
molds, both attached to a sliding frame T, 85
movecl downward by a treadle t by the foot
of one of the attendants and raised by a
spring U when the foot is removed.
I raise the platform to any desired height
for operating the machine by placing four 90
or more pieces of timber under it.
I frame other planks V on top of suffi-
cient size and strength for the gudgeons of
the vertical shafts.
I form hoppers W W between the planks 95
to receive the clay.
To make a single machine containing only
two pistons I take off the two 30 inch wheels
and the small wheel between them and place
the horse on the line between the two pis- 100
tons. In working the machine, the horse
will travel far enough to carry the clay
through between the bars to make the length
of a brick. He then travels the contrary
way the same distance, which reverses the 105
motion of the pistons.
The method of using the machine is as
follows : I first prepare the clay by grinding
it in a common mixing tub and then put
it into the hoppers of the brick machine by 110
means of wheel barrows or shovels. I cause
the horse or horses to move around, with the
sweep about two thirds of the circle in which
he walks — this carries out two of the pistons
5 and recedes two ; those thus advanced force
the clay between the bars in a condensed
state into the molds. The knives are then
brought down by the attendant bearing his
foot on a treadle, which also contracts the
10 spring to Avhich they are attached — ^the cut
being made, the brick or tile is formed in
the molds — the foot is then raised when the
spring again carries up the knives. The
molds are then removed and discharged.
15 The horse is then driven back which causes
the other two pistons to perform a similar
operation. Water is all the time passing
through the channels for keeping the bars,
plank and platform wet and the clay in a
moist state. The molds are held in place 20
while molding by pins or stops z z.
What I claim as my invention and which
I desire to secure by Letters Patent, is —
1. The combination and arrangement of
the several parts of the before described 25
machine for making bricks.
2. The channels in the plank and bars for
conveying water to moisten the clay and
keep the bars wet.
3. The valves and apertures in the pistons. 30
The principle of forcing the clay through
a grating into the molds and cutting off
the clay by a knife passing between the
molds and the grating, is not claimed.
GAYLOED V. HARPER.