Improvements in Fire Proof Floors or Ceilings.
Year: 1898

page_text: Date of Application, 15th June, 1898-Accepted, 20th Aug.,
1898
COMPLETE SPECIFICATION.
Improvements in Fire Proof Floors or Ceilings.
I, FRANZ PULDA, of Gutzkowstrasse, Dresden, Saxony, Architect, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following state-
ment:-
This invention relates to a construction of fire proof floor or ceiling of moulded
building blocks or shaped stones of a rhombic or oblique sided cross section laid
to the right and left of the central line of the floor in such a way as to provide
at or near this line a wedge shaped space which is filled in with a concrete or
cement mass to form a central block and lock the blocks or stones to the right
and left of the same in position. The central locking block is or may be
strengthened with a metal, iron for instance, core in the form of a tube or rod
which is embedded in said locking block.
In the accompanying drawing a fire proof floor or ceiling of this invention is
shewn in cross section and perspective.
a are metal joists and a¹ a wall on which the floor or ceiling is carried. 6 the
side bearing blocks or stones moulded or shaped for bedding against the joists
and building into the wall respectively. Starting from the side bearing blocks
on the right and left hand and in a horizontal plane are placed a suitable number
of blocks or stones c of approximately the cross section shewn, until with the
exception of a central vacant wedge shaped space, the span is filled up. This
space, the blocks being, in position, is filled up with a concrete or cement mass d
as above stated so as to form a wedge locking block which, as shewn on the left
hand side of the figure, may be strengthened by means of a metal core e although
this may not always be considered necessary.
It is claimed that this construction having a central locking block of concrete
or cement renders unnecessary the usual exactness of the size and fitting of the
blocks and further that the construction is suitable for large spans.
Although it is preferred to place the locking block centrally, as shewn, the
same may of course be placed at any other suitable part of the floor or ceiling.
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 fire proof floor or ceiling constructed of moulded building blocks or shaped
stones having oblique meeting surfaces and so placed as to leave between two
sections of a span a wedge shaped space which is filled in with a concrete or
cement mass, substantially as described and shewn.
2. A fire proof floor or ceiling constructed of moulded building blocks or shaped
stones having oblique meeting surfaces and so placed as to leave between two

page_text: sections of a span a wedge shaped space which is filled in with a concrete or
cement mass provided with a metal strengthening core, substantially as described
and shewn.
Dated this 15th day of June 1898
THOMAS R. SHILLITO,
15, Tooks Court, London, E.C.