A NEW PLASTIC COMPOUND SUITABLE TO BE ROLLED INTO SHEETS AND USED AS A SUBSTITUTE FOR PROVISIONAL SP AND USED AS A SUBSTITUTE FOR EBONITE ALSO TO MAKE BATTERY CELLS AND OTHER ARTICLES
Year: 1883

page_text: LETTERS PATENT to Willoughby Smith of Wharf Road City Road in the
County of Middlesex for an Invention of "A NEW PLASTIC COMPOUND
SUITABLE TO BE ROLLED INTO SHEETS AND USED AS A SUBSTITUTE FOR
PROVISIONAL SPECIFICATION left by the said Willoughby Smith at the
Office of the Commissioners of Patents on the 27th February 1883.
WILLOUGHBY SMITH of Wharf Road City Road in the County of Middlesex
"A NEW PLASTIC COMPOUND SUITABLE TO BE ROLLED INTO SHEETS AND USED AS
A SUBSTITUTE FOR EBONITE ALSO TO MAKE BATTERY CELLS AND OTHER ARTICLES
"
This Invention has for its object a new plastic compound suitable to be rolled
into sheets and used as a substitute for ebonite also to make battery cells and other
articles.
On the 28th day of December last I filed an application for Letters Patent for
improvements in insulating conductors for electric lighting and other purposes,
which improvements consist in coating the conductors with a certain composition
for which composition I now also desire to obtain Letters Patent.
My present application does not include either the insulation of conductors or
the preparation of materials for that purpose.
For rolling into sheets, and for use as a substitute for ebonite and for making
battery cells and other articles I take gutta percha such as can be obtained in the
market at a comparatively cheap rate and I mix it with finely powdered bituminous
coal. The coal, which should be of good quality, is ground, and sifted through fine
sieves as flour is prepared.
The gutta percha is brought to a plastic state by means of heat and the powdered
coal is incorporated with it whilst the gutta percha is being masticated in an
ordinary masticating machine or by the aid of rollers or otherwise. The proportions
may be varied, equal weights of gutta percha and coal dust form a useful compound.
My experiments prove that this compound is easily rolled into sheets and may be
used with advantage as a substitute for ebonite; also that it can be moulded in
moulds and is very suitable for making battery cells and like articles.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Willoughby Smith in the Great Seal Patent Office on the 27th August
1883.
WILLOUGHBY SMITH of Wharf Road City Road in the County of Middlesex
"A NEW PLASTIC COMPOUND SUITABLE TO BE ROLLED INTO SHEETS AND USED AS
A SUBSTITUTE FOR EBONITE ALSO TO MAKE BATTERY CELLS AND OTHER ARTICLES
"
This invention has for its object a new plastic compound suitable to be rolled
into sheets and used as a substitute for ebonite also to make battery cells and other
articles.
On the 28th day of December last I filed an application for and in due course I
obtained, Letters Patent for improvements in insulating conductors for electric
lighting and other purposes, which improvements consist in coating the conductors
with a certain composition.
My present Patent is for the composition itself but does not include either the
insulation of conductors or the preparation of materials for that purpose.
For rolling into sheets and for use as a substitute for ebonite and for making
battery cells and other articles I take gutta percha such as can be obtained in the
market at a comparatively cheap rate and I mix it with finely powdered bituminous
coal. The coal which should be of good quality is ground and sifted through fine
sieves as, flour is prepared.
The gutta percha is brought to a plastic state by means of heat and the powdered
coal is incorporated with it whilst the gutta percha is being masticated in an
ordinary masticating machine or by the aid of rollers or otherwise. The proportions
may be varied, equal weights of gutta percha and coal dust form a useful compound.
My experiments prove that this compound is easily rolled into sheets and may be
used with advantage as a substitute for ebonite; also that it can be moulded in
moulds and is very suitable for making battery cells and like articles.
1 claim the plastic compound consisting of gutta percha and finely powdered
bituminous coal and suitable to be rolled into sheets and used as a substitute for
ebonite and also to make battery cells and other articles.
In witness whereof I the said Willoughby Smith have hereunto set my hand
and seal this 16th day of August in the year of our Lord One thousand eight
hundred and eighty three.
WILLY SMITH (10)