Improvements in Waterproof Slabs and Blocks for Structural Purposes.
Year: 1889

page_text: Date of Application, 18th Sept., 1889
Complete Specification Left, 17th Oct., 1889-Accepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Waterproof Slabs and Blocks for Structural
Purposes.
1. DONALD NICOLL. of No. 12 Buckingham Street, Charing Cross, in the County of
London, Civil Engineer do hereby declare the nature of this invention to be as
follows:-
With one or more of the bituminous substances described in Specifications to my
Patents No. 480 dated 5th Feby. 1866. No. 694 dated 11th March 1867. No. 2480
dated 31st August 1867. No. 1199 dated 25th Jany. 1887. No. 6933 dated 11th May
1887. I mix in suitable proportions grit shingle sand chalk or other substances
ordinarily used for the formation of concrete in the foundation of structures. The
desired compound is best produced by the use of the mixing apparatus described in
my Patent No. 6933 dated 11th May 1887. When thus blended cast the compound
into moulds shaped so as to form tenons and mortises enabling one slab or block to
join into another and form a continuous line the points of junction being by preference
caulked by a combination of fibre and the elastic substance described in my Patent
No. 13,971 dated 28th Septr. 1888. In order to produce waterproof slabs and blocks
of a size and weight hitherto considered impossible especially for the structure of
sea wails I proceed as follows. I take the slabs or blocks formed in the manner herein.
before described and I suspend one over another to correspond in tenon and
mortise allowing only sufficient space between them to permit Haine to extend over
both surfaces and when these are sufficiently heated I lower the upper slab and cause
it to 'he permanently fused or joined to the lower slab and by continuing this process
1 produce a block of great dimensions and strength-to produce the flame herein-
before mentioned I prefer to use the ignited vapour of maptha or mineral oil in the
form of a spray driven by compressed air so as to cover the entire surfaces of the
slabs intended to be joined.
TAJ ME. 101 day of Quiambian 1900
COMPLETE SPECIFICATION.
Improvements in Waterproof Slabs and Blocks for Structural
Purposes.
I, DONALD NICOLL, of 12 Buckinghain Street, Charing Cross, in the City of
London, Civil 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 :-
With one or more of the bituminous substances described in my Patents No. 480
dated 5th Feby. 1866. No. 694 dated 11th March 1867. No. 2,480 dated 31st August
1867. No. 1199 dated 25th Jany. 1887 and No. 6,933 dated 11th May, 1887. I mix
in suitable proportions grit shingle sand chalk or other substances ordinarily used
for the formation of concrete. The desired compound is best produced by the use
of the mixing apparatus described in my Patent No. 6933 dated 11th May 1887.
When thus blended cast the compound into moulds shaped so as to form tenous
and mortises enabling one slab or block to join into another and form a continuous
line the points of junction being by preference caulked by a combination of fibre
and the elastic substance described in my Patent No. 13,971 dated 28th September
1888. In order to produce waterproof slabs and blocks of a size and weight hitherto
considered impossible especially for the structure of sea walls I proceed as follows:
I take the slab or block formed in the manner herein before described and I suspend

page_text: one over another to correspond in tenon and mortise allowing only sufficient space
hetween them to permit Hame to extend over both surfaces and when these are
sufficiently heated I lower the upper slah and cause it to be permanently fused or
joined to the lower slab and by continuing this process I produce a block of great
dimensions and strength to produce the flame hereinbefore mentioned. I prefer to use
the ignited vapour of naptha or mineral oil in the form of a spray driven by com-
pressed air so as to cover the entire surface of the slab intended to be joined.
'
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I state that I do not limit myself to
the exact configuration of the tenons and mortises hereinbefore described as such may
he hollowed out bevilled off or made angular as may best suit any required purpose.
and I do not limit myself to the use of the said slabs and blocks for the construction'
of sea walls as I find that such may be advantageously used in the construction of
tunnels and other and similar works requiring the power to exclude water, but I
declare that what I claim is
Substantially the formation of waterproof blocks by joining slabs together in the
manner herein before described and to be used for structural, purposes.
Dated this Seventeenth day of October 1889.
DONALD NICOLL.