Improvements in or relating to Devices for Locating Punctures in Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 12th Nov., 1898
Complete Specification Left, 5th July, 1899-Accepted, 5th Aug., 1899
PATIONAL DILUITIVATION.
Improvements in or relating to Devices for Locating Punctures in
Pneumatic Tyres.
I, ALFRED GEORGE MACKLIN, of 35, Railton Road, Brixton, in the County of
London, Cycle Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to certain improvements in devices for ascertaining the
exact location of punctures in pneumatic tyres, or air tubes, or the like, the
usual method for finding which has been by running the air tube through water,
the puncture being found by the bubbles which are caused where the air
escapes.
In consequence of water not being always available when it is required for the
purpose of ascertaining the whereabouts of a puncture and the difficulty oft-
times experienced in locating punctures by other means, the method I adopt is
to take a piece of finely interlaced netting, made of wire or any other material,
which can be roughened or spiked to retain powder or any fine material between
the meshes and make of it an instrument semi circular in shape, so as to fit over
the air tube, or any other shape as may be found desirable, and to insert powdered
chalk, or any other substance that could be used for a similar purpose, between
the meshes of my device. On this instrument, thus prepared, being run round
the air tube, the puncture is instantly found by the chalk or other substance
being forced from the "locator" where the air is emitted from the puncture.
My instrument can be made of any material through which the air from the
puncturo could penetrate.
Improvements in or relating to Devices for Locating Punctures in
Pneumatic Tyres.
I, ALFRED GEORGE MACKLIN, of 35, Railton Road, Brixton, in the County of
London, Cycle Agent, 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 certain improvements in devices for ascertaining the
exact location of punctures in pneumatic tyres, or air tubes, or the like, the
usual method for finding which has been by running the air tube through water,
DQ11

page_text: the puncture being found by the bubbles which are caused where the air
escapes.
In consequence of water not being always available when it is required for the
purpose of ascertaining the whereabouts of a puncture and the difficulty oft
times experienced in locating punctures by other means, the method I adopt is
to take a piece of finely interlaced netting, made of wire or any other material
which can be roughened or spiked to retain powder or any fine material between
the meshes, and make of it an instrument semicircular in shape, so as to fit over
the air tube, or any other shape as may be found desirable, and to insert powdered
chalk, or any other substance that could be used for a similar purpose, between
the meshes of my device. On this instrument thus prépared being run round
the air tube, the puncture is instantly found by the chalk or other substance
being forced from the locator where the air is emitted from the puncture.
In the accompanying drawings Fig. 1 represents the " puncture finder" bent
to conform it to the shape of the air tube. Fig. 2 is an end elevation of the
same.
The gauze A is made of fine steel wire through which the air from the puncture
can penetrate and which is roughened or barbed so as to effectually hold any
finely powdered substance that is rubbed over it. The gauze A is provided with
a case or binding B to keep the device the required shape.
In use a little French chalk or the like is placed on the inside surface of the
locator and is rubbed in with the thumb and fingers, the roughened or barbed wire
ensuring that it is retained between the meshes. When this device is passed over
a puncture or leak in a slightly inflated tube the escaping air will blow away
the chalk over the puncture and show a distinct line on the locator. The chalk
may be afterwards shaken out and used over the repaired puncture.
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
The puncture finder as hereinbefore described and illustrated in the accompany-
ing drawings, Figs. 1 and 2, consisting of the barbed or roughened wire gauze.
Dated this 4th dox of July 1800
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.