PAINTING SIGNALS TO BE USED FOR RAILWAY PURPOSES
Year: 1884

page_text: We HORACE WILMER of 9 Grove Crescent Woodford in the County of Essex
Engineer and THOMAS BOLAS of 8 Grove Terrace Chiswick in the County of
Middlesex Analytical Chemist do hereby declare the nature of our Invention for
PAINTING SIGNALS TO BE USED FOR RAILWAY PURPOSES to be as follows:-
We dissolve resinous materials in Ethylic Alcohol, Methylic Alcohol, or the
mixture of the two Alcohols ordinarily known as Methylated Spirit and with
this we incorporate a sufficient quantity of the red Sulphide of Mercury, known
as Vermilion, so as to form a paint of a convenient consistency.
The resinous material which we use is lac, this lac being shell lac, seed lac
button lac or stick lac, whether in its original condition or after bleaching; with
the addition of Burgundy Pitch or its equivalent-We regard as equivalents of
Burgundy Pitch such resinous substances as will communicate pliability to the
film left on the evaporation of the alcohol or spirit.
The proportions we prefer are the following but it will be well understood that'
these may be varied more or less according to circumstances.
Lac
Alcohol
-
· Burgundy pitch or its equivalent
Vermilion
1000 parts by weight
1530 parts by weight
200 parts by weight
800 parts by weight
Our Invention consists in the use of such a Composition as that above described
for the purpose of painting such signals as are used on Railways; such a compo-
sition having a much greater permanence under such atmospheric conditions as
Railway signals are ordinarily exposed to than any of the paints hitherto employed
for Signal painting.

page_text: We HORACE WILMER of 9 Grove Crescent Woodford in the county of Essex,
Engineer and THOMAS BOLAS of 8 Grove Terrace Chiswick in the county of
Middlesex, Analytical Chemist do hereby declare the nature of our invention for
AN IMPROVED COMPOSITION FOR USE IN PAINTING RAILWAY SIGNALS
" and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
55
We dissolve suitable resinous materials in Ethylic alcohol, methylic alcohol,
or the mixture of the two alcohols, ordinarily known as methylated spirits, or
such other suitable vehicle, as will act as equivalent to these alcoholic mixtures,-
and with these we incorporate, a sufficient quantity of the red sulphide of mercury
known as vermilion, so as to form a paint or mixture, of a convenient consistency.
The resinous material which we use by preference is lac, this lac being shellac,
seed lac, button lac, or stick-lac, either in its original condition, or after bleaching,
with the addition of Burgundy pitch, or its equivalent. We regard as equivalent
of Burgundy pitch, such substance or substances as will communicate pliability
to the film left on the evaporation of the alcohol or other vehicle used.
The proportions we prefer are the following but we wish it to be well understood,
that these may be varied, more or less, according to circumstances, and that we do
not confine ourselves to the following proportions.
Lac
Alcohol
Burgundy pitch or its equivalent
Vermilion
-
1000 parts by weight
1530 "
"
"
-
200
"
27
"
-
800
"
"
او
In carrying our invention into practice, we apply such a composition as that
above described to such signals. as are used on Railways, we having found that
"such a composition has a much greater permanence under such atmospheric condi-
tions, as Railway signals are ordinarily exposed to; than any other paints or
compositions hitherto employed for signal painting or similar purposes. The
composition may be applied to signals with a brush in the usual manner.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed. We declare that
what we claim is
The manufacture of a composition, consisting of certain resinous materials,
dissolved in suitable alcoholic mixture and incorporated with vermilion, substan-
tially as and for the purposes hereinbefore described and set forth.
Dated this fifth day of January 1885
i
WAUGH & CHAPMAN,
Agents for Applicants,
70, Chancery Lane, W.C.