Year: 1896

page_text: I, LUDWIG WEISS, Contractor, of Raab, Hungary, do hereby declare the
nature of this invention to be as follows:-
The present invention relates to a new brick for flat and cylindrical structures
which it is possible to lay without the expensive scaffolding bitherto necessary with
that class of bricks.
The brick is produced from a straight parallelopipedon in this way that a short
side face and a long side face are cut into a form of a rounded W that is to say
corrugated while the other two faces are also formed with similar corrugations so
that the first named side faces have a groove-like recess in the middle and the last
named surfaces have ribs corresponding to the said grooves. In this way the
projections on one brick engage with the grooves of the neighbouring brick and
hold it. In order to further the adhesion of the mortar the bricks are formed with
grooves. These bricks are also formed with 3 through passages, of which the
upper and lower serve to diminish the weight whilst the middle one serves to
receive a tie bolt.
The bond of the bricks can be arranged as desired between girders or in walls.
The grooves and ribs can naturally also be of rectangular, oval or any other
desirable section.
When the bricks are bent in the direction of their length so that their parallel
flat surfaces form arcs of circles of equal radii they serve for circular structures.
These of course may have the same cross section as those used for flat structures,
the only difference between them being that the end surfaces generally are not
corrugated but flat conforming to the radius of the curve.
The general form of such a brick for cylindrical structures is therefore a sector
of a circle. The curved surfaces of the bricks as well as the flat surfaces have
small ribs for the better holding of the mortar or bonding material. One of the
flat surfaces of the brick is furnished with a curved groove concentric with the
curved surfaces of the brick while the other parallel flat surface is furnished with
a projecting curved tongue or rib which is so formed as to fit exactly in the groove
of the next brick. The profile of the tongue may be however of any desirable
form or similar to that of the flat brick.
The grooves and tongues may also be so widened that in place thereof the flat
parallel surfaces may have, the one a circular wedge-shape recess and the other a
circular wedge-shape projection without affecting in any way the essence of this
invention.
Finally these parallel surfaces may have also, the one several circular wedge-
shaped recesses and the other several corresponding circular wedge-shaped
projections. Further these bricks are perforated with air holes in the direction of
the curve for the sake of reducing the weight.
When for example a circular channel is built up of such bricks it consists of a
series of rings in which the end surfaces of each brick adjoin while the projecting
tongue of each ring fits into the corresponding groove of the next ring and the
parallel surfaces of the bricks in each ring also adjoin.
It is clear that such a circular channel or similar structure in consequence of the

page_text: rib which fits into the groove cannot be disturbed by any radial pressure from
the inside or be disturbed by similar pressure from the outside.
Dated this 25th day of June 1896.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
1, LUDWIG WEISS, Contractor, of Raab Hungary, 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 present invention relates to a new brick for flat and cylindrical structures
which it is possible to lay without the expensive scaffolding hitherto necessary with
that class of bricks.
Fig. 1 is an end view, Fig. 2 a side view and Fig. 3 perspective view of such a
new brick for flat structures.
Fig. 4 is a cross section Fig. 5 a side view and Fig. 6 a plan view of such a
brick for cylindrical structures.
Fig. 7 is a plan view of a flat structure made with such bricks, and Fig. 8
a section on line - of Fig. 7.
Fig. 9 shews an entirely cylindrical structure made with such bricks.
The brick is produced from a straight parallelopipedon in this way that a short
side face a and à long side face b are cut into the form of a rounded W that is to
say corrugated while the other two faces c and d are also formed with similar
corrugations, so that the first named side faces a and b have a groove like recess e
in the middle, and the surfaces c and d have ribs f corresponding to the said
grooves. These ribs f and grooves e form the most important part of the bricks,
because thereby only the bricks can be joined without the use of a scaffold and yet
not fall down as the projections f on one brick engage with the grooves e of the
neighbouring brick and hold it; without this the bricks would simply slide against
each other. In order to further the adhesion of the mortar the bricks are formed
with grooves g. These bricks are also formed with three through passages of
which the upper and lower k k serve to diminish the weight whilst the middle one j
serves to receive a tie bolt i as shewn in Figs. 7 and 8. The bond of the bricks
can be arranged as desired hetween girders & Figs. 7 and 8 or in walls..
The grooves e and ribs f may of course be of rectangular, oval or any other
desirable section.
When the bricks are bent in the direction of their length so that their parallel
flat surfaces form concentric ares of circles they serve for circular structures.
These of course may have the same cross section as those used for flat structures,
the only difference between them being that the end surfaces generally are not
corrugated but flat conforming to the radius of the curve as shown at e' Fig. 5,
and also Fig. 6. For such a brick the section Fig. 4 is the most advantageous.
The general form of such a brick for cylindrical structures is therefore a sector
of a circle; the curved surfaces a¹ of the bricks as well as the flat surfaces have
small ribs or grooves like g for the better holding of the mortar or binding
material; one of the parallel flat surfaces of the brick is furnished with a curved
groove concentric with the curved surfaces of the brick, while the other parallel
flat surface is provided with a projecting curved tongue c¹ which is so formed as to
fit exactly in the groove b¹ of the next brick. The profile of the tongue may
however be of any desirable form or similar to that of the flat brick Fig. 1.
The grooves and tongues c¹ may also be so widened that in place thereof the

page_text: flat parallel surfaces may have the one a circular wedge shaped recess, and the other
a circular wedge shaped projection without in any way affecting the essence of this
invention. Finally these parallel surfaces may also have the one several circular
wedge shaped recesses and the other several corresponding circular wedge shaped
projections, Fig. 7. Further these bricks are perforated with air holes d' for the
sake of reducing the weight.
When for example a circular channel is built up of such bricks as shewn in,
Fig. 9, it consists of a series of rings in which the end surfaces e' of each brick
adjoin while the projecting tongue c¹ of each ring fits into the corresponding
groove 6 of the next ring and the parallel surfaces of the bricks a' in each ring
also adjoin.
It is clear that such a circular channel or similar structures in consequence of
the rib c which fits into the groove b₁ cannot be disturbed by any radial pressure
from the inside or be disturbed by similar pressure from the outside.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A brick for flat structures made in the form of a parallelopipedon with
through passages such as k k and i and having two wave shaped side faces so that
the projecting parts a and b are provided with grooves e and the receding parts c
and d are provided with ribs corresponding to the grooves e, the through passage i
serving to receive a tie bolt, substantially as described and shewn.
2. A brick for curved structures made in the form of a parallelopipedon but
curved in the length direction and then forming a sector piece of a prismatic ring
one of the parallel joint surfaces having an annular groove such as b₁ of any
suitable profile and the other joint surface having a corresponding rib e', through
channels d¹ being provided, substantially as described and shewn.
Dated this Twenty-fifth day of March 1897.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.