emer Bridges and Girders.
Year: 1896

page_text: emer
Bridges and Girders.
JOSEPHI THOMAS ANDREWS and GEORGE EDWARD MONTAGNON both of No. 79
Gracechurch Street in the City of London, Engineers We do hereby declare the
nature of this invention to be as follows:-
The object of this Invention is to construct Bridge or other Girders in such a
form as to lessen the cost of manufacture, increase the strength of the structure,
& to reduce the bulk when packed for transit by Rail, Barge or Steamer.
In order to gain these objects it is proposed to construct the Bridge or Girder
of bent or stamped plates of either of the sections shewn in Figs. 6, 7, 8 & 9 on
accompanying Drawing or any other suitable form which may adapt itself to the
special requirements of the case. By thus forming the Bridge or Girders of these
stamped plates it is easily packed or stored away for transit as these plates are
commonly sent by rail or ship "nested" or packed one in the other thus saving
a great amount of space either on Trucks, Barge or stowed on board ship.
In order to make this clear we annex hereto a drawing shewing some of the
Forms of Lattice Girders or Bridges to which this invention is applicable viz. the
members marked A, B, C, & D on Figs. 1, 2, 3, 4 & 5 are proposed to be made of
the sections or forms above mentioned viz. Figs. 6, 7, 8 & 9 or any other suitable
section or form.
Dated the 7th 1 AT L
1000
JOSEPH THOMAS ANDREWS,
GEORGE EDWARD MONTAGNON,
79 Gracechurch Street, E.C.
Improvements in Bridges and Girders.
We, JOSEPH THOMAS ANDREWS, Engineer, and GEORGE EDWARD MONTAGNON
Engineer, both of 79 Gracechurch Street, in the City of London, 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 object of this Invention is to construct bridges or bridge or other girders
so as to lessen the cost of manufacture and increase the strength of the structure
relatively to the weight of material employed and enable the component parts
of the bridges or girders to be packed for transit in a minimum of space so as
to reduce freightage charges.

page_text: In order to attain these objects the bridges or girders are made of plates of
metal, such as iron or steel, which are bent or stamped or equivalently operated
upon so that whilst when joined together to form the members of the bridge or
girder, they give the requisite stiffness and strength to the structure with the
minimum of weight, they can when separated be "nested" together, or placed one
within the other, or partly within the other, so as to occupy but a comparatively
small space for transit by land or water. Figures 6, 7, 8 and 9 of the drawing
accompanying our Provisional Specification illustrate sections of plates which
have been bent or stamped or equivalently formed to shapes suitable for the
purposes of this Invention, pairs of such plates being shewn in the positions in
which they are placed relatively to each other before being connected to form
the component parts of the bridge or girder, they being, in constructing the
bridge or girder, connected together by bolts or rivets passed through the flanges
formed on each plate. By separating plates of the sectional forms shewn in
Figures 6, 7 and 8 they can be nested together, or placed one within the other,
for transit, whilst plates of the form shewn in Figure 9 will when separated receive
other members sufficiently small to be received in the troughs which the said
plates form. By thus nesting the parts together very considerable space on trucks
barges, ships, or the like, is saved and cost of freight is correspondingly reduced.
The several parts of bridges or girders shewn in Figures 1, 2, 3, 4 and 5 of the
drawing accompanying our Provisional Specification (and some of which are
marked A. B. C and D) can be formed in this manner. The accompanying
drawing shews in Figure 10 in side elevation and in transverse section in
Figure 11 part of a bridge made of plates according to this Invention the upper
and lower members A3 A3 being formed of plates of the character shewn in
Figure 7 and the side members, bracings or ties Bs being made of plates of the
character shewn in Figure 7 with flanges at the sides for joining the two com-
ponent parts together and with flanges at the ends for connecting these side
members, bracings or ties to the top and bottom members by means of the
connecting plates C as shewn in the section of part to a larger scale Figure 12.
The bridge here illustrated is provided with a floor of corrugated or trough shaped
plates D. Figures 13 and 14 are a side elevation and a cross section of part of
a bridge with trough shaped cross and rail girders the top and bottom
members A2 A3 being like those shewn in Figures 10, 11, and 12, and the cross
girders E and rail girders F being made of trough shaped plates placed back to
back when used in the construction of the bridge but separable so that the smaller
parts F can be placed within the larger troughs formed by the parts E for
transit. The side members B are like those shewn in Figures 10 and 11. The
girders E rest on angle pieces secured to the plates C. Strut pieces of semi-
circular cross section formed by stamped or pressed plates are used as struts at G.
Having now particularly described and ascertained the nature of this Invention
and in what manner the same is to be performed we declare that what we
claim is.
The construction of bridges, or girders, of bent or stamped, or equivalently
formed plates; which can be joined together to form the structure and be separated
so as to be "nested" together for transit; substantially as herein before described
and illustrated.
JOHNSONS & WILLCOX,.
47 Lincoln's Inn Fields, London, W.C., Agents.