Improvements relating to Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 12th Sept., 1906
Complete Specification Left, 4th Dec., 1896-Accepted, 27th Feb., 1897
Complete Specification Left, 4th Dec., 1896-Accepted, 27th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements relating to Pneumatic Tyres.
I, THOMAS ROWLEY, of Corporation Street, Manchester, in the County of
Lancaster, Consulting India Rubber Expert, do hereby declare the nature of this
invention to be as follows:-
This invention relates to means for discovering the locality of a puncture in the
air tube of a pneumatic tyre:
The object of this invention is to enable a cyclist or other person to localise any
small puncture, or to determine if the air tube is porous, which is not detected
without considerable trouble and expenditure of time by the methods ordinarily
adopted.
In this invention I apply to the interior surface of an air tube at any convenient
period during the process of manufacture and either before or after vulcanisation
an aniline or other suitable colouring matter preferably in a powdered form but
which may in like manner be applied in the form of paste.
I employ by preference any bright colour such as scarlet, and soluble either in
water or spirit.
In order to detect a puncture in an air tube in which the aforesaid aniline or
other colouring matter is applied as herein before described, the exterior surface of
the air tube is moistened with either water or spirit according to the nature of the
aniline or other colouring matter employed, when the perforation will be indicated
by the discolouration of the tube at the point of puncture, or if the tube is porous,
by the general discolouration of the exterior surface.
T
1
1000
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for the Applicant.
1, THOMAS ROWLEY, of Corporation Street, Manchester, in the County of
Lancaster, Consulting India Rubber Expert, 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 means for readily discovering the locality of a puncture,
leakage, or porousness in the air tube of a pneumatic tyre.
The object of this invention is to enable a cyclist or other person to localise any
small puncture, or to determine if the air tube is porous, which is not detected
without considerable trouble and expenditure of time by the methods ordinarily
adopted.

page_text: In this invention I employ an aniline or other suitable colouring matter, or other
detective substance which I apply to the interior surface of the air tube either in a
powdered form, or as a liquefaction, at any convenient period, which may be either
during the process of manufacture or after vulcanisation."
I employ by preference any aniline or other substance that is of a bright colour
such as scarlet, and which is soluble either in water or in spirit, or any fluid or
substance that will give ready indication of its presence through any puncture or
other defect in the air tube.
In applying my invention, the aforesaid colouring matter or substance is placed
within the air tube in either of the forms herein before named that may be preferred.
If an aniline or other colouring matter in a powdered state is employed, a sufficiency
of said powder is inserted in the air tube to dust over the interior surface of said
tube, and in order to detect the locality of a puncture, leakage, or porousness the
exterior surface of the air tube is moistened with either water or spirit according
to the nature of the aniline or other substance employed, when the perforation or
other defect will be indicated by the discoloration of the tube at the point of
puncture, or if the tube is porous by the general discolouration of the exterior
surface.
If the aniline or other substance is a liquefaction in either a fluid or a semi-
fluid state, I insert in like manner into the air tube a sufficient quantity of said
liquefaction that may be spread, or that will spread itself over the interior surface
of the air tube, and will when the air tube is punctured or otherwise become
defective, indicate the puncture or defect by discoloration appearing on the exterior
surface of said tube at the locality of the puncture or defect.
I do not confine myself, to the precise nature of the an line or other colouring
matter or substance to which I have herein before referred: I may employ
ordinary colouring matter or other substance or liquefaction applied in the manner
herein before described that will exude from a puncture or other defect in the air
tube and thereby indicate the locality of said defect, but
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st. In pneumatic tyres the use of an aniline or other suitable colouring matter or
detective substance, applied to the inner surface of the air tube either during the
process of manufacture or after vulcanisation, in the form of a powder, that will be
emitted through any puncture or other defect in said tube, and be made apparent, by
applying moisture to the exterior surface of the tube at any time thereafter for the
purpose and in the manner substantially as herein before described.
2nd. In pneumatic tyres, the use of an aniline or other suitable colouring matter
or detective substance applied to the inner surface of the air tube as a liquefaction
either in a fluid or semi-fluid state, at any convenient period either during the process
of manufacture or after vulcanisation in such a quantity that it may be spread, or
will spread itself over the interior surface of said tube and will when the air tube is
punctured or otherwise become defective, exude from said puncture or defect and
indicate the locality of the puncture or defect substantially as herein before described.
3rd. In pneumatic tyres the use of an aniline or other suitable colouring matter or
detective substance either in a powdered form or as a liquefaction applied to the interior
surface of the air tube, substantially as and for the purpose herein before described.
Dated this 3rd day of December 1896
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for the Applicant.