Improvements in Lining Plates for Tunnels or Subways.
Year: 1891

page_text: Date of Application, 23rd July, 1891
Complete Specification Left, 19th Apr., 1892-Accepted, 21st May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Lining Plates for Tunnels or Subways.
We, STEPHEN ALLEY, and JOHN ALEXANDER MACLELLAN, of Sentinel
Works, Polmadie, in the County of Renfrew, North Britain, Engineers, do hereby
declare the nature of this invention to be as follows, that is to say :-
Our said invention has for its object to improve and facilitate the lining of tunnels
or subways with metallic plates; and it consists in making such plates of improved
and special forins, allowing of each ring of plates being completed without using one
or more extra narrow plates different from the rest, as heretofore.
In carrying out our invention we may use hexagonal plates, or lozenge-shaped
plates, or square plates placed diagonally; we however prefer to use plates of a
shape obtainable by dividing a short cylindrical shell by centrally equidistant cuts
having slight inclinations alternately directed opposite ways. Each plate has a
narrow and a broad edge parallel to each other and connected by the inclined
edges. In building in a ring of plates one of the plates having its broad edge
forwards is at first placed a little in advance of the others, and after the other
plates have been adjusted and fixed, is drawn backwards like a wedge into its
proper place. The flange joints between the plates may be such as are ordinarily
employed; our improved construction however admits of the entire surfaces of
each pair of flanges being in contact; or a small rebate may be formed near the
outer edges of the flanges for caulking or packing with wood or other material.
The plates may be formed with corrugations or with buckled or other configurations
giving increased strength.
Dated this Twenty-second day of July 1891.
EDMUND HUNT,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Lining Plates for Tunnels or Subways.
We, STEPHEN ALLEY, and JOHN ALEXANDER MACLELLAN, of Sentinel
Works, Polmadie, in the County of Renfrew, North Britain, Engineers, 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, that
is to say:
Our said invention has for its object to improve and facilitate the lining of tunnels
or subways with metallic plates; and it consists in making such plates of improved
and special forms, allowing of each ring of plates being completed without using
one or more extra narrow plates different from the rest as heretofore.
In carrying out our invention we may use hexagonal plates, or lozenge shaped
plates, or square plates placed diagonally, we however prefer to use plates of a
shape obtainable by dividing a short cylindrical shell by centrally equidistant cuts
having slight inclinations alternately directed opposite ways. Each plate has a
narrow and a broad edge parallel to each other and connected by the inclined edges.
With our improved construction the entire surfaces of each pair of flanges are in
contact; or a small rebate may be formed near the outer edges of the flanges
for caulking or packing with wood or other material. The plates may be
formed with corrugations or with buckled or other configurations giving increased
strength.
And in order that our said invention and the manner of performing the same

page_text: may be properly understood we hereunto append a sheet of explanatory drawings
to be hereinafter referred to and showing examples of our improved lining plates.
Figure, 1, on the accompanying sheet of drawings is an inside-face view and
Figure, 2, is a section at right angles to Figure, 1, of one example of our lining
plates. Figures 3, and 4, are similar views of a second example and Figures, 5,
and 6, are sections of single plates. In these drawings the same reference letters
are used to mark the same or like parts wherever they are repeated.
In the example shown in Figures, 1, and 2, we use plates, P, each of which
has a narrow edge, E, and a broad edge, B, parallel to each other these_edges
being connected by inclined edges, A. In building in a ring of plates, P, one
of the plates having its broad edge, B, forwards is at first placed a little in advance
of the others and after the other plates have been adjusted and fixed, is drawn
backwards like a wedge into its proper place. The entire surfaces of each pair of
the flanges, F, of the plates, P, are in contact.
In the example shown in Figures, 3, and 4, plates, P, are of hexagonal form.
Figure, 5, shows a plate, P, as made with corrugations; and Figure, 6, shows a
plate as made of a buckled shape.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :
The constructing of lining plates for tunnels or subways of improved forms such
as are hereinbefore described and examples of which are shown in the accompanying
drawings.
Dated this Eighteenth day of April 1892.
EDMUND HUNT,
Applicants' Agent.