An Improved Composition Applicable for Securing Pavement Lights and other purposes.
Year: 1897

page_text: Date of Application, 27th Apr., 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION.
An Improved Composition Applicable for Securing Pavement
Lights and other purposes.
We, FRANK MILLS, of Geraldine Road, Wandsworth Common, Surrey, Sanitary
Engineer, and FRANK TRICKETT, of 3 Wharf, Great Northern Railway, King's
Cross, London, Stone Merchant, 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:-
This Invention relates to an improved damp-proof or watertight composition,
the same being specially applicable for securing pavement lights in their frames,
and such frames in their stone settings, and being also applicable for use as a
dampproof course in the laying of walls, and as a dampproof covering for walls
and for similar purposes, for fixing wood block flooring without the aid or necessity
of dowels or keys and for various other analogous purposes.
The improved composition possesses the advantage of being, when set, both
dampproof and flexible or compressible and expansible, whereby it permits of the
expansion and contraction of its surroundings due to varying atmospheric tem-
perature or other cause, while, nevertheless, also retaining its dampproof and
watertight qualities and effectually preventing leakage of water through or between
it and its surroundings, such, for example, as the pavement light frame, in which
the "lights" are set.
The improved composition consists of an admixture of gas tar, rosiu, pitch and
sulphur, which are preferably compounded in the following proportions, namely,
of gas tar and of rosin, one part each, and of pitch and of sulphur, one half part
each, the whole being boiled together and thoroughly admixed while being boiled.
If the resultant admixture is too thick to run freely or for its intended purpose, a
sufficient quantity of creosote oil or of spirit of tar may be added thereto to
sufficiently liquefy the same.
The composition is applied while hot and liquid, and, when it sets, it will be
flexible, that is to say, it will be compressible and will yield if its surroundings
expand, and will expand if its surroundings contract, and, under both conditions,
will retain its dampproof or watertight capacity unimpaired.
Stockholm tar may be used in lieu of gas tar. We do not limit ourselves to
the exact proportions mentioned, but find those we have mentioned to satisfactorily
answer every purpose.
Having now particularly described and ascertained the nature of our said In-
vention and in what manner the same is to be performed, we declare that what we
claim is:-
1. A flexible dampproof composition composed of gas tar, rosin, pitch and
sulphur boiled together.
2. A flexible dampproof composition composed of gas tar, rosin, pitch and
1

page_text: 3. A flexible dampproof composition composed of gas tar, rosin, pitch and
sulphur boiled together, and admixed in about the respective proportions above
mentioned, and thinned, if required, with creosote oil or spirit of tar.
Dated this 26th day of April 1897.
DAY, DAVIES, & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicants.