An Improved Metal Lattice for use in Building Arched Roofs and other Constructions.
Year: 1892

page_text: Date of Application, 20th Dec., 1892
Complete Specification Left, 1st Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
An Improved Metal Lattice for use in Building Arched Roofs and
other Constructions.
I, SEBASTIAN GRUBER of 17ª Herbststrasse Munich in the Empire of Germany
Wire Manufacturer do hereby declare the nature of this invention to be as
follows:-
The purpose of this invention is to provide an improved lattice work made up of
bands of metal, usually iron or steel, and intended to be built into various
constructions of concrete, beton, cement or equivalent materials for the purpose of
giving strength thereto, for instance to walls, arched or other roofs or vaulting,
ceilings or floors, light bridges and other constructions exposed to strains or stresses
due to compression or otherwise.
The improved lattice is intended to combine lightness and cheapness with strength
in a very effectual manner and it is constructed of band metal of suitable breadth
connected as hereinafter explained so that the planes of the bands are perpendicular
to the plane in which the lattice extends.
The bands are alternately straight bands parallel to each other and at certain
distances apart, and bands bent in a trapezoidal or "zig-zag” manner, so as to
occupy the spaces between the straight bands and form connections between them
at numerous points.
These trapezoidal bands are placed symmetrically on each side of each straight
band (other than the first and last straight band which have a trapezoidal bar on
one side only) so that they meet the straight band in the same place the one on
the one face, the other on the other face. The three bands are secured at each
said meeting place by a rivet or, if the breadth of the bands is considerable, by two
or even more rivets.
This lattice or frame presents great rigidity in the plane of its extension and
great strength against compression, it also presents great tenacity and tensile
strength against lateral pressure or pull in direction of its extension.
Datad this 20th do...
R. HADDAN,
Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Metal Lattice for use in Building Arched Roofs and
other Constructions.
I SEBASTIAN GRUBER of 17* Herbststrasse, Munich in the Empire of Germany,
Wire Manufacturer 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 purpose of this invention is to provide an improved lattice work made up of
bands of metal, usually iron or steel, and intended to be built into various con-
structions of concrete, beton, cement, or equivalent materials for the purpose of
giving strength thereto, for instance to walls, arched or other roofs or vaulting,
ceilings or floors, light bridges and other constructions exposed to strains or stresses
due to compression or otherwise.
The improved lattice is intended to combine lightness and cheapness with strength
in a very effectual manner and it is constructed of band metal of suitable breadth
connected as hereinafter explained so that the planes of the bands are perpendicular
to the plane in which the lattice extends.

page_text: 66
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The bands are alternately flat unbent bands parallel to each other and at certain
distances apart, and bands bent in a trapezoidal or zig-zag manner, so as to
occupy the space between the unbent bands and form connections between them at
numerous points.
These trapezoidal bands are placed symmetrically on each side of each unbent
band (other than the first and last unbent bands which have a trapezoidal bar on
one side only) so that they meet the unbent band in the same place the one on the
one face, the other on the other face.
The three bands are secured at each said meeting place by a rivet or, if the
breadth of the bands is considerable, by two or even more rivets.
When the lattice is made to occupy a curved plane, the unbent bars aforesaid are
made curved but flat according to the plane desired.
This lattice or frame presents great rigidity in the plane of its extension
and great strength against compression; it also presents great tenacity and tensile
strength against lateral pressure or pull in direction of its extension.
The annexed drawing illustrates in Fig. 1 the construction of such lattice of
unbent bands a and trapezoidal bands b.
Fig. 2 illustrates such lattice made in an arched form and resting between two
girders.
Fig. 3 shows the same made stronger with two rivets at each meeting place of
the bands.
The thickness and breadth of the bands and the closeness of the meeting places
are according to the strength desired.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
A lattice made up of parallel plane straight or curved bands and trapezoidally
bent intermediate bands rivetted together in the manner hereindescribed.
Dated this 1st day of September 1893.
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.