Improvements in the Construction of Metallic Girders.
Year: 1892

page_text: Date of Application, 15th Jan., 1892
Complete Specification Left. 15th Oct., 1392-Accepted, 19th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Metallic Girders.
I, WILLIAM ORR, of 109 Saint Vincent Street, Glasgow, in the County of
Lanark, Merchant, do hereby declare the nature of this invention to be as
follows:
This invention relates to metallic girders and it has for its object to provide a
girder light in structure, easily erected at the place where it is to be used and
whose component parts can be packed together into small compass for transport.
To that end the girder is composed of two iron or steel tubes of round, oval,
rectangular or other cross section one of which constitutes the top and the other
the bottom member. The tubes may be close or butt jointed or welded and
between them a web or mid rib extends the said web being composed of a number of
sections cach having a jaw or recess at its upper and lower part shaped to the contour
of the tubes and into which the tubes are entered whilst at its ends each section of
the web is rebatted, morticed and tenoned raggled serrated or waved correspondingly
with the next section so as to give the various sections a hold upon cach other.
The sections of the mid rib are pushed into place one after the other from one end
of the girder and the whole structure is bound together by end plates or flanges
which have holes in them at distances apart corresponding to the depth of the
girder these holes receiving the ends of the tubes or solid plugs screwed into the
said ends.
The end plates are wedged or screwed hard up causing all the sections of the
mid web or rib to bear against each other end wise and constitute at the same time
a light but very rigid structure.
The rigidity of the structure may be further increased by driving pins downwards
through the interlaced joining ends of the sections of the ribs and by filling the
tubes with concrete.
Dated this Fourteenth day of January 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in the Construction of Metallic Girders.
I, WILLIAM ORR of 109 Saint Vincent Street, Glasgow in the County of
Lanark Merchant 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 :-
This invention relates to metallic girders, and it has for its object to provide a
girder light in structure easily erected at the place where it is to be erected and
whose component parts can be packed together into small compass for transport.
The improved girder is illustrated in part elevation and part longitudinal section
by Figures 1 and 2 and in cross sections on the lines - and y-y by Figures 3
and 4 of the accompanying drawings Figure 5 being an end elevation of Figure 1
and it is composed of two iron or steel tubes a of round, oval, rectangular or other
cross section one of which constitutes the top and the other the bottom member.
The tubes may be close or butt jointed or welded and between them a web or mid
rib extends the said web being composed of a number of sections each having a
series of eyes c at its upper and lower part shaped to the contour of the tubes and
го

page_text: through which the tubes pass as shewn by Figure 1 or the web sectious & may be made
tubular at their upper and lower edges so as to enclose the tubes a as at d Figure 2.
The eye c or end of the tubular part d of one section is so formed as to enter the
eye or tube end of the next section as at e and the mid ribs may either be made so
as simply to bear against each other as at for they may be flanged or raggled
as at g and bolted or otherwise secured together. The sections of the web bare
pushed into place one after the other from one end of the girder and the whole
structure may be bound together by caps or plugs j Figure 1 screwed on or into the
ends of the tubes a or as at Figure 2 binding plates may be placed on to the
ends of the tubes a and wedged, pinned, or otherwise secured in position;-in either
case so as to cause all the sections of the web to bear against each other endwise
and constitute at the same time a light but very rigid structure.
The rigidity of the structure, may be further increased by filling the tubes with
concrete.
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 :-
A metallic girder constructed substantially as hereinbefore described with
reference to the drawings annexed.
דשית
1000
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.