and End Straight Joints.
Year: 1885

page_text: and End Straight Joints.
I HENRY BLYTHE of Bagworth, Leicestershire, Engine Wright, do hereby declare
the nature of this invention to be as follows:-
The object of my invention is to produce bricks and the like in such a shape as
to avoid side and end "straight joints" so common when ordinary bricks are used
in the construction of walls, pit shafts &c., and also so secure tieing and keying to
ensure durability, and soundness of work.
To accomplish this I provide bricks having a projection or lug near the centre
of one side, the other side of the brick being suitably recessed, to receive the lug
or projection of another brick, so that by interlocking or "tieing" there may be
less likelihood of bricks becoming loose and also to be more air and watertight
this being used preferably for 9 in. work thus securing a solid top head or tie
course for 9 work.
Or I may recess one or both ends of bricks at right angles to avoid end straight
joints ih 41 work or J may provide lugs or projections at one end of the brick
with a suitable recess at the other so that they may be readily interlocked.
This latter may be used for 41" brickwork the advantages being obvious.
100K

page_text: and End Straight Joints.
I HENRY BLYTHE of Bagworth Colliery near Leicester 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:-
--
The object of my invention is to construct bricks and the like in such a shape
as to avoid side and end." straight joints" so common when ordinary bricks are
used in the construction of walls, pit shafts etcetæra and also to secure tieing
and keying to ensure durability and soundness of work.
r
To accomplish this I provide bricks having a projection or lug near the centre of
one side the other side of the brick being suitably recessed to receive the lug or 1
projection of another brick so that by interlocking or tieing" there may be less
likelihood of bricka becoming loose and also they will be more air and watertight,
this being used preferably for 9" work thus securing a solid top head or tie course
for 9" work.
Or I may recess one or both ends of bricks at right angles to avoid end straight
joints in 4" work or I may provide lugs or projections at one end of the brick
with a suitable recess at the other so that they may be readily interlocked.
This latter may be used for 41" brick work the advantages being obvious.
In the accompanying drawings Figure 1 represents a single brick having a
projection A formed on one end and on the opposite face of the brick at the same
end is formed a recess B to receive the projection A of another similar brick D is
a projection on the side of the brick and C is a recess opposite thereto made of a
shape suitable to, receive the projection D of an adjoining brick.
Figure 2 represents a number of similar bricks set in position to form 9" wall
work and it will be readily seen that the bricks are so locked together that a firm
and tight wall is secured.
Figure 3 is a single brick with the recess C dovetailed and the projection D
shaped to fit a similar recess in an adjoining briek. The flange A is also provided.
It will be noticed that this modification may be used in the construction of
chimney stacks and the like where firmness and what is known as a firm " bond"
is required.
Figure 4 is a brick with a semi-circular recess C and with a corresponding semi-
circular projection D to suit bricks of this formation. The ledge A is also pro-
vided for the purposes already specified in connection with Figures 1 and 2.
Figure 5 represents a few bricks to be employed in the construction of what
may be termed circular work namely pit shafts headings and tunnelling.
The flange A and corresponding recess B the recess O and the corresponding
projection D are provided and the bricks are tapered as usual for this class of work.
The foregoing relates principally to 9" work and the following modifications
are provided for 41" work. Figure 6 shews interlocking brick with rectangular
projection D and corresponding recess C.

page_text: Figure 7 shews a brick having two recesses C so that bricks having two pro-
jections D as in Figure 8 may be used in conjunction therewith. Figure 9 shews
a brick with a semi-circular projection D and a corresponding recess C.
Figure 10 shews a brick with recesses C at either end on the same side but we
may have similar recesses if desired on one or either sides.
Figure 11 shews a brick with recesses C at both ends on opposite faces and
Figure 12 shews a recess C the whole length of the brick.
Bricks of the foregoing shape and other modified forms of my invention may
be produced by moulds of the required shape and pressed in the ordinary way and
all my bricks may have the ledge A & recess B.
It will also be understood that I do not limit myself to the exact outlines given
herein as my bricks admit of further variation in shape without departing from
the spirit of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same may be performed I declare that what
I claim is:
1. A brick having a projecting ledge or flange such as A at the top or other
part substantially as and for the purpose specified.
2. A brick having a recess or groove such as B to receive the projecting ledge
or flange A of an adjacent brick substantially as specified.
3. A brick having a projection or projections such as D to fit into a corre
sponding recess or recesses such as C of adjoining bricks substantially as specified
and illustrated in Figures 6, 8 and 9 of the accompanying drawings.
4. A brick having a recess or recesses such as C to receive the projections of
adjoining bricks substantially as specified and illustrated in Figures 6, 7, and 9
of the accompanying drawings.
5. A brick having a ledge A & corresponding recess B and a projection D &
corresponding recess C substantially as shewn in Fig. 1.
Dated this 21st day of July 1886.
Witness,
W. M. RICHARDS,
Patent Office,
Market Street, Leicester,
HENRY BLYTHE.