IMPROVEMENTS IN THE MANUFACTURE OF BELTING, STRAPS FOR RAILWAY CARRIAGE WINDOWS AND THE LIKE
Year: 1885

page_text: I GEORGE FREDERICK REDFERN of the General Patent Office N° 4, South Street,
Finsbury, in the County of Middlesex Patent Agent do hereby declare the
nature of the said invention for "IMPROVEMENTS IN THE MANUFACTURE OF
BELTING, STRAPS FOR RAILWAY CARRIAGE WINDOWS AND THE LIKE" a com-
munication from abroad by Gotthard Rettig of Stockholm in the Kingdom of
Sweden Consul General 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 the manufacture of belting, straps for railway carriage
windows, and the like.
Cotton fabrics have been found to be most suitable for treatment according to
this invention, but other fabrics can also be used. In carrying out the invention
the said fabrics are first impregnated in any known manner with a suitable solution
such as a solution of alum or soap, partly with the object of rendering the cloth
supple and partly for making it less liable to the influence of air and moisture,
whereby the belting produced will be more durable.
The belting or straps are then covered with a protecting coating as follows:-
Good raw linseed oil is first carefully boiled and to about 2.6 litres of the said
oil, is added about 01 to 0.5 kilogramme finely divided India-rubber or gutta-
percha, about 0-02 to 0-05 litres of rape-seed-oil or other non-drying oil and about
25 to 85 grammes of litharge of silver, tallow or other suitable fat is also added in
the proportion of about 01 to 0.4 kilogramme to about 262 litres of oil. The
litharge having been well dissolved in the oil, copper smoke is added in about the
proportion of 17 to 51 grammes per 2.6 litres of oil and in very small quantities at
a time and it should also be well mixed with the oil.
Simultaneously with or after adding the copper smoke, borax is added in the
proportion of 0.2 to 0.4 kilogramme per 262 litres. The boiling should occupy
about 1 hour, during which time the oil should be well stirred. After the oil
has been boiled it is strained and then well mixed with suitable pigments,
preferably colcothar and lamp-black. The quantity and extent of mixture of the

page_text: pigments obviously will depend upon the colour desired to be given to the
product.
When the oil has become cold, it is ready for use, but in order to cause it to dry
quickly it should be mixed with turpentine and xeratine.
The coating or colour thus prepared may be used for belting and straps woven
in one piece or made of pieces of cloth or fabric sewn together.
If the belting is to be manufactured in the latter manner, the cloth or fabric,
impregnated in the manner hereinbefore described is folded, stretched sewn
together and pressed into a belting of the required thickness and width, after which
the belting is coated one or more times with the colour prepared in the above
manner. If it is desired to economize the colour or to produce a very pliable
belting, the cloth before applying the colour is covered with a paste prepared from
glue and flour well boiled together.
It will be obvious that the herein before described proportions for the preparation
of the coating or colour may be varied also that the litharge of silver, copper-
smoke and borax only serve as siccatives, and may therefor be substituted by other
suitable materials which will produce a similar effect. The process of coating may
be effected in various ways either by hand or by suitable mechanical means.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The manufacture of belting, straps for railway carriage windows and the like
by coating the surfaces of the same with a composition or colour consisting
substantially of boiled linseed-oil and india rubber or gutta percha together with
smaller quantities of rape oil or other non-drying oil and tallow or other fat
suitable siccatives such as litharge of silver, copper, smoke and borax being added
to the linseed oil whilst the latter is boiling substantially as hereinbefore described.
2. The method of treating belting as claimed in claim 1 in combination with the
described preliminary impregnation or pasting separately or conjointly substantially
as hereinbefore described.
3. The manufacture and use of belting straps and the like as hereinbefore
described.