Improvements in and relating to Bricks for Building Flat Arches and the like.
Year: 1899

page_text: Date of Application, 31st Oct., 1899
Complete Specification Loft 27th July 1900 Accented 20th Sent 1000
PROVISIONAL SPECIFICATION.
Improvements in and relating to Bricks for Building Flat Arches
and the like.
I, JAMES MARSHALL, of Bryn Mawr, Cleland, Lanarkshire, Jomer, do hereby
declare the nature of my invention to be as follows · —
This invention has reference to improvements in and relating to bricks for
building flat arches of buildings, floors bridges, and the like
According to my improvements the bricks are formed with a projecting
tapered or wedge surface for about one half of their length, or, height, and with
a correspondingly shaped recessed or grooved surface for the other part, the
projecting and recessed surfaces being formed on correspondingly opposite faces,
that is the same shaped parts being diagonally opposite
By this means the bricks are taken and put together and the projecting pait
of the one brick fits on to the recessed part of the adjacent brick and they are
thus jammed or wedged together
The centre brick or a few of the bricks at the centre of arch would preferably
be formed of plain or ordinary shape, and the bricks adjacent to them would
preferably be formed with projecting or wedge surfaces at the recessed parts
In some cases the improved bricks would only be formed with the projecting
surfaces for about half of their length and fit into the recessed corresponding
part of the adjacent bricks, leaving the other or lower half or portion of each
brick with a plain or flat surface or this single wedging may extend the whole
length of the bricks
The projections and recesses would preferably only be formed at the central
parts of the bricks, that is leaving a marginal plain surface on each side
Deted the 30th October 1800
Improvements in and relating to Bricks for Building Flat Arches
and the like.
I, JAMES MARSHALL, of Bryn Mawr, Cleland, Lanarkshire, Joiner, do hereby
declare the nature of my invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement in writing:-
This invention has reference to improvements in and relating to bucks for
building flat arches of buildings, floors, bridges, and the like

page_text: And in order that my said invention and the manner of carrying same into
practice may be properly understood, I have hereunto appended a sheet of
explanatory diawings in which Figure 1 18 a side elevation of a single buck
showing the projecting and recessed tapered parts on opposite surfaces, and
extending to only half the depth of buck Figures 2 and 3 are similar views of
bricks in which the tapered and recessed surfaces extend the whole depth of
the bucks, the bricks being angled to suit for opposite sides of the key stones,
the bricks marked 1 and 2 being of similar formation but of different angles
so as to wedge or jam with each other when being built together
Figure 4 is an elevation of a structure with the bucks set in arch, and
Figures 5 and 6 show plan views to an enlarged acale showing the bricks arranged
as for a single arch and a multiple or broad arch respectively
Referring to these drawings
According to my improvements the bricks are formed with a projecting
tapered on wedge surface a for about one half of their length, or height, as shown
in Figure 1, and with a correspondingly shaped recessed or grooved surface b
for the other part, the projecting and recessed surfaces being formed on corre-
spondingly opposite faces, the lower half or portion of each buick being formed
with plain or flat surfaces
As shown in Figures 2 and 3 the projecting parts a and recessed parts b may
extend the whole depth of the bricks for being wedged to the adjacent bricks
The projections a and recesses 6 would preferably only be formed at the central
parts of the bricks, that is leaving a marginal plain surface a¹ and 6¹ on each side
By this means as shown in Figure 5 the bricks are taken and put together and
the projecting part a of the one brick fits on to the recessed part 6 of the adjacent
buck and they are thus jammed or wedged together
The centre brick A would preferably be formed of plain or ordinary shape, and
those on each side of like shape on the adjacent surfaces and have their
opposite surfaces recessed to receive the projections on the next set of bricks as
shown in Figure 5 But in the arrangement shown in Figure 6 the marginal
parts of the bucks marked 2 fit within the recessed parts 6 of the bricks,
and vice versa the parts of the bricks 1 fit within the recessed parts 6 of the
bricks 2 while the central projecting parts a wedge or jam or lie in the same
transverse straight line In the bricks marked 3 Figure 6 the small or half
bricks marked 3 are formed with the tapered projections a and the corresponding
recessed or flat parts b on opposite diagonal faces
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim 18 —
Fust The torming of bricks for building flat arches and the like, with pro-
Jecting and recessed parts or surfaces, substantially as set forth
Second The arranging of bucks with tapered projecting and recessed surfaces
to wedge and be held together to form flat arches and the like, substantially as
herem described in reference to and shown in the accompanying drawings
Third Structures formed with flat arches built from bricks with tapered pio-
jecting and recessed parts, substantially as set forth
Doted the 28th July 1900
W. R M THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents