An Improved Dry Press Brick-making Machine.
Year: 1891

page_text: The decision of the Chief Examiner, acting on behalf of the Comptroller, of the
28th day of September 1894, allowed, under Section 18 of the Patents, &c.
Act, 1883, an Amendment of this Specification.
Date of Application, 4th Feb., 1891-Accepted, 7th Mar., 1891
COMPLETE SPECIFICATION (AMENDED).
An Improved Dry Press Brick-making Machine.
We, GEORGE WALTER BLANKS and BERNARD LEFEBURE, both of Mitchell
Street, Glebe, Sydney, in the Colony of New South Wales, Engineers, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The object of our invention is to construct a dry press brick-making machine
which shall be capable of producing bricks which do not vary in size and which
when being moulded shall be pressed with an equal pressure of many tons, making
them solid, compact, and even in shape.
The dry press brick-making machines at present in use necessitate the use of
heavy framing in their construction as it is customary to use two main shafts; and
when the brick is being pressed owing to the two shafts and the height of the
framing, the various parts of the machine spring, and as a result the bricks vary
in size, and the stampers foul with the edges of the liners wearing them rapidly
away, the steel liners and die plate too are usually so arranged as to cause great
loss of time when replacing with new ones.
.
In our invention we use but one main or cam shaft in the construction of our
dry press brick-making machine and the pressure on the stampers of which we use
two, a top stamper and a bottom stamper, is equally distributed on the cam shaft,
the cams on the shaft forcing one stamper up and pulling the other stamper. down-
wards; there is therefore little tendency to spring or bend the cam shaft and the
pressure on the bearings being equal the framing is not in any way distorted.
Our liners are simply dropped into recesses made to receive them in the table
to which the die plate is screwed and are easily renewed in a short space of
time.
For operating the charger box, we use cams secured to one of the geared
wheels.
Figure 1 is a section at Z Z.
Figure 2 is a plan.
Figure 3 is a longitudinal section at X X.
Figure 4 is an elevation' showing the method of operating the charger box.
Figure 5 is a plan of the die plate.
Figure 6 is a section of the die plate showing the liners.
Our invention consists of a sole plate A to which are bolted the upright
frames B B; on the frames B B and bolted to 'them rests the table Cof cast or
wrought iron, to the table C are bolted the guides D and E; 'on the driving
shaft F are the fast and loose pulleys G and H, on the shaft F is geared the spur
wheel I which gears with the toothed wheel J which is keyed on the shaft K, at
Predi

page_text: the opposite end of the shaft K is keyed the spur wheel L which gears with the
toothed wheel M which is keyed on the cam shaft N.
The cams a and b are rigidly attached to the cam shaft N to actuate the top
stamper O, and c and d are cams rigidly attached to the cam shaft N to actuate
the bottom stamper P, the cams e and fon the cam shaft N are for raising the top
stamper rapidly and for keeping it raised while the charger box travels forward
and deposits its charge of material in the die boxes; while the charger is stationary
the top stamper O drops through the charger box d' on to the material filling the
moulds and thus ensuring a full charge, the top stamper is now raised by the
cams e and fand the charger box is drawn backwards.
The top stamper O is connected by means of the rods g and to the frames Q
and R respectively which are preferably of cast iron and divided into two parts
at and respectively and are held together by the rods and keyed by the
cotters m. The frames Q and R travel vertically in the guides n and o. In the
bottom of the frames Q and R are the rollers ŕ and s respectively which act in
contact with the cams a and b; in the bottom stamper P are the rollers and u
which act in contact with the cams c and d; on the bolts and w are the rollers a
and y which act in contact with the cams e and. The bottom stamper P slides
in the guides - which may be cast on the table C. The liners a' which may be
of steel, cast iron or any other suitable metal fit in recesses in the table C and the
die plate b fits over them and is securely fastened to the table; guide bars c¹ are
bolted to the table C to act as guides for the charger box d' which is operated by
the levers e and 1, the lever el is attached to the spindle g' on which is also
attached the lever at the end of which is the roller j' which acts in contact
with the cam pieces and the latter being securely bolted to the toothed
wheel M.
We will further proceed to describe our invention. Motion is communicated to
the cam shaft N from the pulley H and gearing I. J. L. M. the charger box receives
its charge of material from the hopper and is pulled over the die boxes n¹ and o¹
by means of the levers e¹ and f¹ which are actuated from the cam
pieces ¹ and
on the toothed wheel M and empties itself into the die boxes n' and o' and rapidly
returns-to-its-original-position; in the meantime the bottom stamper P as the
cams c and d revolved has fallen to its lowest position, while the charger is stationary
over the die boxes the top stamper O drops through the charger box d' on to the material
filling the moulds and thus ensuring a full charge; the top stamper is now raised by the
cams e and f and the charger box rapidly returns to its original position, the top
stamper O being held in its highest position by the cams e and funtil the charger
box d has returned; the canise and revolving with the cam shaft N now allow
the top stamper O to fall; as the shaft N revolves the cams a and b acting on the
rollers and s begin to pull downwards the top stamper and press the brick, at
the same time the bottom stamper is forced upwards by the cams c and d and
presses the brick from the bottom; the top and bottom stampers being drawn
towards each other until the limit of pressure is reached. The cams a and b now
release the top stamper O which is raised by the cams e and fand held raised until
the charger box d' returns; and the cams c and d force the now moulded brick to
the surface of the die plate 6, the brick being pushed forward by the charger
box din its next stroke. It is seen that the stampers O and P travelling
towards each other with a constantly increasing pressure and with an equal
pressure on the top and bottom of the brick produce a brick which is even in
form compact solid and smooth. If the liners require renewing by unscrewing
the die plate band lifting it from the table C the liners may be renewed in a short
period.
•
Provision is made for heating the top and bottom stampers as ordinarily.
For regulating the density of the brick a device is attached below the table C,
consisting of a saddle p' and a guide q' through which passes the bar inclined
at sand and having a thread u' at one end, on which is screwed the wheel v¹;
locked by the locknut w¹.

page_text: It is seen that by screwing or unscrewing the wheel the bar is raised or
lowered, the bottom stamper P falling on the bar r¹ at each stroke, thus regulating
the density of the brick to suit various materials.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ÷-
1. In a dry press brick-making machine the use or application of a single main
or cam shaft for giving a great pressure on the top and bottom of the brick simul-
taneously and performing the necessary movements as for instance that is to say
lifting up the top stamper twice, drawing it down and pressing the bottom
stamper upwards all in one revolution performing work usually done by two shafts
in other brick-making machines substantially as and for the purpose herein set
forth.
2. The method of securing the liners to the die box cubstantially as and for the
purpose herein set forth.
3. The combination of the cam pieces, levers, and rollers with the charger box
for netnating came substantially as and for the purpose herein set forth.
4. 2. The method of regulating in a machine such as described the density of the
brick substantially as and for the purpose herein set forth.
Dated this 30th day of January 1891.
AYRTON & THOMAS,
Patent Agents.

page_text: Date of Application, 4th Feb., 1891-Accepted, 7th Mar., 1891
COMPLETE SPECIFICATION.
An Improved Dry Press Brick-making Machine.
We, GEORGE WALTER BLANKS and BERNARD LEFEBURE, both of Mitchell
Street, Glebe, Sydney, in the Colony of New South Wales, Engineers, do hereby
declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The object of our invention is to construct a dry press brick-making machine
which shall be capable of producing bricks which do not vary in size and which
when being moulded shall be pressed with an equal pressure of many tons, making
them solid, compact, and even in shape.
The dry press brick-making machines at present in use necessitate the use of
heavy framing in their construction as it is customary to use two main shafts and
when the brick is being pressed owing to the two shafts and the height of the
framing, the various parts of the machine spring, and as a result the bricks vary
in size, and the stampers foul with the edges of the liners wearing them rapidly
away, the steel liners and die plate too are usually so arranged as to cause great
loss of time when replacing with new ones.
In our invention we use but one main or cam shaft in the construction of our
dry press brick-making machine and the pressure on the stampers of which we use
two, a top stamper and a bottom stamper, is equally distributed on the cam shaft,
the cams on the shaft forcing one stamper up and pulling the other stamper down-
wards; there is therefore little tendency to spring or bend the cam shaft and the
pressure on the bearings being equal the framing is not in any way distorted.
Our liners are simply dropped into recesses made to receive them in the table
to which the die plate is screwed and are easily renewed in a short space of
time.
For operating the charger box, we use cams secured to one of the geared
wheels.
Figure is a section at Z Z.
Figure 2 is a plan.
Figure 3 is a longitudinal section at XX.
Figure 4 is an elevation showing the method of operating the charger box.
Figure 5 is a plan of the die plate.
Figure 6 is a section of the die plate showing the liners.
Our invention consists of a sole plate A to which are bolted the upright
frames B B; on the frames B B and bolted to them rests the table C of cast or
wrought iron, to the table C are bolted the guides D and E on the driving
shaft F are the fast and loose pulleys G and H, on the shaft F is geared the spur
wheel I which gears with the toothed wheel J which is keyed on the shaft K, at
the opposite end of the shaft K is keyed the spur wheel L. which gears with the
toothed wheel M which is keyed on the cam shaft N.
0
The cams a and b are rigidly attached to the cam shaft N to actuate the top
stamper O, and c and d are cams rigidly attached to the cam shaft N to actuate
the bottom stamper P, the cams e and on the cam shaft N are for raising the top
stamper O rapidly and for keeping it raised while the charger box travels forward
and deposits its charge of material in the die boxes; while the charger is stationary
the top stamper O drops through the charger box d on to the material filling the
moulds and thus ensuring a full charge, the top stamper is now raised by the
cams e and and the charger box is drawn backwards.
The top stamper O is connected by means of the rods and h to the frames Q

page_text: ?"
t;
C
and R respectively which are preferably of cast iron and divided into two parts
at and respectively and are held together by the rods i and keyed by the
cotters m. The frames and R travel vertically in the guides n and o. In the
bottom of the frames Q and R are the rollers and s respectively which act in
contact with the camsa and ; in the bottom stamper Pare the rollers and u
which act in contact with the cams c and d on the bolts and we are the rollers a
andy which act in contact with the cams.e and f. The bottom stamper P slides
in the guides
which may be cast on the table C. The liners a' which may be
of steel, cast iron or any other suitable metal fit in recesses in the table C and the
die plate b fits over them and is securely fastened to the table; guide bars care
bolted to the table C to act as guides for the charger box which is, operated by
the levers and f', the lever el is attached to the spindle on which is also
attached the lever at the end of which is the roller which, acts in contact
with the cam pieces and the latter being securely bolted to the toothed
wheel M.
We will further proceed to describe our invention. Motion is communicated 'to
the cam shaft N from the pulley H and gearing I. J. L. M. the charger box receives
its charge of material from the hopper and is pulled over the die boxes n' and o
by means of the levers el and which are actuated from the cam pieces.kl and
on the toothed wheel M and empties itself into the die boxes n' and o' and rapidly
returns to its original position; in the meantime the bottom stamper P as the
cams c and d revolved lias fallen to its lowest position; the top stamper O being
held in its highest position by the cams e and f until the charger box d lias
returned; the cams e and revolving with the cam shaft N now allow the top
stamper Oto fall; as the shaft N revolves the cams a and b acting on the rollers.r
and's begin to pull downwards the top stamper O and press the brick, at the same
time the bottom stamper is forced upwards by the cams c and d and presses the
brick from the bottom; the top and bottom stampers being drawn towards, each
other until the limit of pressure is reached.. The cams a and b now release the
top stamper O which is raised by the cams e and fand held raised until the charger
box returns; and the cams c and d force the now moulded brick to the surface
of the die plate ', the brick being pushed forward by the charger box din its
next stroke. It is seen that the stampers O and P travelling, towards each other
with a constantly increasing pressure and with an equal pressure on the top and
bottom of the brick produce a brick which is even in form compact solid, and
smooth. If the liners require renewing by unscrewing the die plate and lifting
it from the table C the liners may be renewed in a short period.
་
Provision is made for heating the top and bottom stampers as ordinarily.
For regulating the density of the brick a device is attached below the table C,
consisting of a saddle p' and a guide through which passes the bar inclined
at sand and having a thread at one end, on which is screwed the wheel v³,
locked by the locknut w¹.
It is seen that by screwing or unscrewing the wheel the bar is raised or
lowered, the bottom stamper P falling on the bar at each stroke, thus regulating
the density of the brick to suit various materials.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim, is:
:-
1. In a dry press brick-making machine the use or application of a single main
or cam shaft for giving a great pressure on the top and bottom of the brick simul-
taneously and performing the necessary movements as for instance lifting up the
top stamper twice, drawing it down and pressing the bottom stamper upwards all
in one revolution performing work usually done by two shafts, in, other -brick-
making machines substantially as and for the purpose herein set forth.
2. The method of securing the liners to the die box substantially as and for the
purpose herein set forth.

page_text: 3. The combination of the cam pieces, levers, and rollers with the charger box
for actuating same substantially as and for the purpose herein set forth.
4. The method of regulating the density of the brick substantially as and for the
purpose herein set forth.
Dated this 30th day of January 1891.
AYRTON & THOMAS,
Patent Agents.