An Improved Construction of Paving with Moulded Slag Blocks.
Year: 1886

page_text: Date of Application, 6th Dec., 1885.
Complete Left, 28th Feb., 1887.
Complete Accepted, 29th Mar., 1887.
An Improved Construction of Paving with Moulded Slag Blocks.
I, CHARLES JAMES DOBBS, of Middlesborough in the County of York, do hereby
declare the nature of this invention to be as follows:-
In constructing paving with slag blocks it is usual to lay the blocks in rows with
narrow spaces between cach two rows, which spaces are then run in with cement,
pitch or other suitable material, for consolidating the paving. For forming the narrow
spaces strips of wood are placed against the rows of blocks as they are formed, which
strips are afterwards removed. My invention has for its object to obviate the labour
and expense involved in placing and removing the said wood strips. For this purpose
I form on one or both sides of the slag blocks small fillets, ribs or stud-like projections,
which, when the blocks are placed in position, come in contact with the flat sides or
with the corresponding projections of the previous row of blocks and thus keep the
two rows a sufficient distance apart to form the before mentioned narrow channel,
which is then filled in with the cementing material. By preference I form the blocks
with the said projections on one side only, for which purpose corresponding recesses
are formed in one side of the mould in which the block is cast.
Dated this 6th day of December 1886.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Construction of Paving with Moulded Slag Blocks.
I, CHARLES JAMES DOBBS of Middlesborough in the County of York 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 :-
In constructing paving with slag blocks it is usual to lay the blocks in rows with
narrow spaces between each two rows, which spaces are then run in with cement,
pitch or other suitable material, for consolidating the paving. For forming the narrow
spaces, strips of wood are placed against the rows of blocks as they are formed, which
strips are afterwards removed. My invention has for its object to obviate the labour
and expense involved in placing and removing the said wood strips. For this
purpose
I form on one or both sides of the slag blocks small fillets, ribs or stud-like projections,
which, when the blocks are placed in position, come in contact with the flat sides or
with the corresponding projections of the previous row of blocks and thus keep the
two rows a sufficient distance apart to form the before-mentioned narrow channel,
which is then filled in with the cementing material. By preference I form the blocks
with the said projections on one side only, for which purpose corresponding recesses
are formed in one side of the mould in which the block is cast.
Fig. 1 of the accompanying drawing shews a perspective view of a slag paving
block A with a fillet a cast on its lower edge; a similar fillet may be formed on the
other side as shewn in dotted lines at a¹.
In Fig. 2 the block is shewn with an upright fillet a² a² at each end, and at Fig. 3
the block is provided with projecting studs a³ a³.. Fig. 4 shews a plan of several rows
of such blocks A placed in position, with narrow spaces B formed between each two
rows by means of the said projecting fillets.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
Constructing paving of moulded slag blocks having projections, ribs or fillets
formed on one or both sides thereof, whereby narrow spaces are made to intervene
between the consecutive rows of such blocks, substantially as herein described.
Dated this 28th day of February 1887.
ABEL & IMRAY,
Agents for the Applicant.