Improved Constructions of Metal Floorings' or Roofings for Bridges and other Structures.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improved Constructions of Metal Floorings' or Roofings for Bridges
and other Structures.
I, GEORGE ANDREW HOBSON, of Coverdale Lodge, Kings Road, Richmond, in the
County of Surrey, Civil Engineer, 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 :-
My invention relates to improvements in the construction of metal floorings or
roofings such as are described in the Specification to my Patent No. 7878 of 1888
whereby I obtain great strength and facility of construction as every part is easily
accessible to a hydraulic rivetter, or rivets are dispensed with.
In the accompanying drawings Figs. 1 and 2 shew one construction of such metal
flooring or roofing which consists of curved or bent plates A secured together on the
underside by iron or steel bars B of T or other section rivetted between the lower
ends of each plate. When this construction is used for longitudinal railway sleepers,
as shewn at the right hand side of the two figures, they are held by brackets D
rivetted to the crown of the plates and they can be made watertight by filling in the
space C with a small quantity of asphalt. When used for a flooring the troughs are
filled in with concrete or other suitable material, to a uniform level and a little above
the top of the plates, as shewn at the left hand side of the two figures. By preference
the width of the T iron employed is such that the gap of even small hydraulic
rivetters will pass over it.
In the construction shewn in Fig. 3 the curved or bent plates A are secured
together by placing the edges of two adjacent plates in iron or steel bars B of channel
section in which they are retained by the bolts H connecting the channel bars with
stay plates I resting on the curved or bent plates.
In the construction shewn in Fig. 4, I use the iron work as described and according
to another of my improvements I provide it with a fire and sound proof covering
consisting of the symmetrical segments a a so shaped at their lower ends as to hold
the bars 66 and bear upon the ironwork as at c, both the segments and bars being of
any suitable composition and moulded or ornamented as desired.
Above the metal structure the flooring may be formed of a layer of fire and sound
proof composition d over which a covering of cement or concrete may be laid.
An important advantage of these constructions of floorings or roofings is that
ordinary plates and trade sections of iron can be used which are easily obtainable.
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 :-
1. A flooring or roofing for bridges and other structures consisting of curved or
bent plates connected together by bars of T section interposed between the ends of
each two plates and rivetted thereto, substantially as described and shewn with
reference to Figures 1 and 2 of the accompanying drawings.
2. A flooring or roofing for bridges and other structures consisting of curved or
bent plates having their contiguous edges inserted into channel irons supported by tie
polts, substantially as described with reference to Fig. 3 of the accompanying
drawings.
3. The use for protecting the structures referred to in the preceding claims of a
overing constructed substantially as described and shewn.
Dated this 20th love of June 1980
ABEL & IMRAY,
Agents for the Applicant.