Improvements in or relating to Air Tubes or Vessels for Pneumatic Appliances.
Year: 1899

page_text: Date of Application, 5th Dec., 1899
Complete Specification Left, 5th Sept., 1900-Accepted 5th D
PROVISIONAL SPECIFICATION.
Improvements in or relating to Air Tubes or Vessels for Pneumatic
Appliances.
I, WALDEMAR BARTSCH, of 36, Ottostrasse, Breslau, in the Empire of Germany,
Provincial Secretary, do hereby declare the nature of this invention to be as
follows:-
This invention relates to air tubes or vessels for pneumatic appliances such as
pneumatic tyres and the like.
The object of the invention is to provide a method of and means for preventing
as far as possible the escape of air from such air tubes. To this end, according
to my invention a mixture of shellac, spirits and turpentine in suitable propor-
tions, is introduced into the air tube, of a pneumatic tyre for instance, through
the valve. The air tube is then inflated, and the air forced in by the pump
distributes the mixture evenly over the entire inner surface of the air tube and
then forces it to a certain depth into the pores of the material of which the air
tube is made rendering the same air proof to a much greater degree than before
treatment.
Dated this Fifth day of December 1899.
J. C. CHAPMAN & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in or relating to Air Tubes or Vessels for Pneumatic
Appliances.
I, WALDEMAR BARTSCH, of 36, Ottostrasse, Breslau, in the Empire of Germany,
Provincial Secretary, 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 air tubes or vessels for pneumatic appliances such as
pneumatic tyres and the like.
The object of the invention is to provide a method of and means for preventing
as far as possible the escape of air from such air tubes. To this end, according
to my invention I employ a mixture of shellac, spirits (dilute alcohol, C₂H,OH)
and turpentine in suitable proportions, which mixture is introduced into the air
tube, of a pneumatic tyre for instance, through the valve. The air tube is then
inflated, and the air forced in by the pump distributes the mixture evenly over
the entire inner surface of the air tube and then forces it to a certain depth into
[Price 8d.]

page_text: the pores of the material of which the air tube is made rendering the same air
proof to a much greater degree than before treatment.
I have found that the above mentioned mixture answers well for the purpose
specified in or about the following proportions, namely, 43 parts shellac, 56 parts
spirits and 1 part turpentine, but I wish it to be understood that I do not bind
myself to these proportions.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
_
1. The use with air tubes or vessels for pneumatic appliances of a mixture of
shellac, spirits and turpentine, substantially in the manner and for the purpose
herein specified.
2. The composition of matter comprising a mixture of shellac, spirits and
turpentine for use in suitable proportions or the proportions specified and in the
manner and for the purpose set forth.
Dated this Fifth day of September 1900.
For the Applicant,
J. C. CHAPMAN & Co.,
Chartered Patent Agents,
70, Chancery Lane, London, W.C.