IMPROVEMENTS IN BRICK PRESSING MACHINES
Year: 1881

page_text: LETTERS PATENT to Hermann Wedekind, of Fenchurch Street, in the City of
London, for an Invention of IMPROVEMENTS IN BRICK PRESSING MACHINES.”
A communication from abroad by Otto Hoffmann and Helmuth Dueberg, both
of the City of Berlin, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Hermann Wedekind at the
Office of the Commissioners of Patents on the 24th May 1881.
HERMANN WEDEKIND, of Fenchurch Street, in the City of London. ❝ IMPROVE-
MENTS IN BRICK PRESSING MACHINES." A. communication from abroad by Otto
Hoffmann and Helmuth Dueberg, both of the City of Berlin, in the Empire of
Germany.
This Invention relates to that class of brick presses usually employed for pressing
perforated facing or other bricks after they have been roughly formed and partially
dried, but before they are burned. The Invention consists in the arrangement and
combination of parts or apparatus by which such pressing may be rapidly and
effectively accomplished, the perforations in the bricks being always filled during
such pressing by stationary or movable mandrils, as hereafter described.
When stationary mandrils are used they enter the pressing cylinder or mould from
one end, and act as guides for the pressing piston, which is provided with openings
corresponding with said mandrils. In this case the weighted piston is carried
and moved by suitable connecting rods or bars operated by means of lever and
double eccentric (or projecting pieces) secured to a common shaft. To said shaft
are also secured a further pair of eccentrics (or a bent shaft may be employed)
carrying connecting rods or bars, which operate and move the cover or lid of the
mould to permit of the removal of the pressed and the insertion of the unpressed
brick. During the pressing the eccentrics hold the cover firmly down on the
mould. With this arrangement of parts, if the lever be moved in one direction, it
causes the piston to travel in the mould and press the brick. If it be moved in
LD 077

page_text: the opposite direction the cover is slid to one side, and the pressed brick forced out
of the mould or press by the piston. When movable nandrils are employed they
enter the mould from the side, while by an arrangement of levers they are
connected and have a simultaneous motion with the cover, that is when the cover
is slid from off the mould to enable an unpressed brick to be placed therein, or a
pressed brick to be removed therefrom; the mandrils are also withdrawn. In
this arrangement after the cover and mandrils have been removed the pressed
brick is forced from the mould by means of the motion of an extra connecting rod
secured to the piston and operated by a crank and a slide piece, which slides in a
slot formed in said connecting rod for the purpose of giving a so called dead
motion when the brick is being pressed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Hermann Wedekind in the Great Seal Patent Office on the
21st November 1881.
HERMANN WEDEKIND, of Fenchurch Street, in the City of London. "IMPROVE-
MENTS IN BRICK PRESSING MACHINES." A communication from abroad by Otto
Hoffmann and Helmuth Dueberg, both of the City of Berlin, in the Empire of
Germany.
This Invention relates to that class of brick presses usually employed for pressing
perforated facing or other bricks after they have been roughly formed and partially
dried, but before they have been burned. The Invention consists in the arrange-
ment and combination of parts or apparatus by which such pressing may be
rapidly and effectively accomplished, the perforations in the bricks being always
filled during such pressing by stationary or moveable mandrils, as hereafter
described. To more clearly explain the nature of the Invention reference is had
to the accompanying Sheets of Drawings, in which similar letters refer to
analagous parts in all the views, and in which Figure 1 represents a section of a
press on the line A, B, Fig. 2; Figure 2 represents a section on the line C, D, Fig. 1;
Figure 3 represents an elevation of a brick pressing machine; Figure 4 is a view of
a pressed brick showing the perforations; Figure 5 is a section of a press with
moveable mandrils on the line A, B, Fig. 6; Figure 6 is a section on the
line C, D, Fig. 5; Figure 7 is an elevation of the brick pressing machine shown
in section in Figs. 5 & 6; Figure 8 is a view of a pressed brick showing the
perforations. When stationary mandrils a, a, are used, as shown in Figa. 1, 2, & 3,
they enter the pressing cylinder or mould P from one end and act as guides for
the pressing piston b, which is provided with openings corresponding with said
mandrils. In this case the weighted piston b is carried and moved by suitable
connecting rods or bars b², b¹, operated by means of lever g and double eccentric or
projecting pieces d, e, secured to a common shaft f. To said shaft are also secured
a further pair of eccentrics K, K (or a bent shaft may be employed), carrying
connecting rods or bars i, i, which operate and move the cover or lid h to permit
of its being slid to one side for the removal of the pressed and the insertion of the
unpressed brick. During the pressing the eccentrics K, K, hold the cover firmly
down on the mould. With this arrangement of parts, if the lever g be moved in
one direction, it causes the piston to travel up in the mould and press the brick.
If it be moved in the opposite direction the cover is raised (and after being slid to
one side) the pressed brick is forced out of the mould or press by the piston.
Where the moveable mandrils a, a, are employed, as shown in Figs. 5, 6, & 7, they
enter the mould P from the side, while by an arrangement of levers n, r, q, they
are connected and have a simultaneous motion with the cover h; that is when
the cover is slid from off the mould to enable an unpressed brick to be placed
therein or a pressed brick to be removed therefrom; the mandrils are also with-
drawn. By this arrangement after the cover and mandrils have been removed,
the pressed brick is forced from the mould by means of the motion of an extra
connecting rod m secured to the piston b, and operated by a crank e and a slide
piece which moves in a slot formed in said connecting rod m, as shown, for the
purpose of giving a so called dead motion when the brick is being pressed. The
entire operation of the machine, as represented in Figs. 1, 2, and 3, being as
follows The cover h having been slid to the left, the brick to be pressed is
placed in the mould P, the stationary mandrils a, a, occupying the perforations in
it; the lever g is pressed, thus turning the shaft f which causes the cam & to raise
the roller c and through it the piston b, which is weighted by a piece of metal 1,

page_text: which serves to give a downward movement to the piston when the roller c is not
in contact with either cams & or e. When the brick has been pressed to the
required size the lever g is reversed, thus causing the cam e to act on the roller c
and raise the piston b at the same time through the eccentrics K, K, and rods i, i,
slightly raising the cover h which is slid on one side, after which the pressed brick
may be forced out. The operation of the press, as shown in Figs. 5, 6, and 7, is
practically the same except that two levers are requisite. After the cover / has
been drawn to the left and the mandrils a, a, simultaneously drawn out of the
mould by means of the lever q acting through the connections r, n, the brick to
be pressed is placed in the mould which is reinclosed by the reverse movement of
the lever q, which at the same time forces the mandrils a, a, into the perforations
in the brick. This being accomplished, the lever g (shewn only in Fig. 6) is
depressed, which action through the cam d and roller c raises the weighted piston b
and presses the brick, and by the motion of eccentrics K, K, brings the cover h
tightly against the top of the mould. While this motion is proceeding it is obvious
that the pin on crank e will move down in the slot on the bar m without acting
on said bar. The lever g is again moved, withdrawing the mandrils and the cover,
when by a reverse motion of the lever g the crank e acting on the bar m through
the pin and slot raises the piston b and forces the pressed brick out of the mould,
the eccentrics K, K, acting, as in Figs. 1, 2, and 3, to first raise the cover h slightly
off the mould, in order that it may be slid to one side by the action of the lever q.
Having thus described the nature of the Invention of my foreign correspondents,
What I claim and desire to secure by Letters Patent is,-
First. In a brick press, the arrangement of one or more stationary mandrils in
the pressing mould used for pressing perforated bricks in combination with a
singly or doubly perforated piston, all as and for the purposes set forth.
Second. In a brick press, the application and use of moveable mandrils passing
through openings in the mould or press and the perforations of unburnt bricks, as
and for the purposes set forth.
Third. In a brick press, the combination of the cover with the moveable mandrils
of said press so arranged that the insertion and withdrawal of the mandrils is done
simultaneously with the opening and closing of the mould, substantially as and
for the purposes set forth.
In witness whereof, I, the said Hermann Wedekind, have hereunto set my
hand and seal, this Twenty first day of November, in the year of our Lord
One thousand eight hundred and eighty one.
Signed, sealed, and delivered
in presence of
AUG. RUMMEL,
158, Fenchurch St.
HERMANN WEDEKIND. (L.S.)