Year: 1896

page_text: Date of Application, 8th Oct., 1896
Complete Specification Left, 6th May., 1897-Accepted, 3rd July, 1897
I WILLIAM WALKER FYFE of 41 Hillside Road, Stamford Hill, London, N,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in pneumatic tyres for wheels such
as are used for cycles, invalid chairs or the like.
For the purposes of my invention I employ interiorly of the inner pneumatic tube
of such tyres a semitube or diaphragm extending from side to side of said tube and
the ends or outer edges of the said semi-tube or diaphragm are to be secured to the
inside on the opposite sides of the said pneumatic tube.
The normal position of the diaphragm will, when the inflation of the pneumatic
tube is established, by way of a nipple and valve, and so maintained, be against or
toward the rim of the wheel inside the tube.
In addition to the said nipple and air-valve a second nipple and valve is provided
leading to the reverse side of the diaphragm, that is, on the side thereof towards the
rim of the wheel, so that air pumped-in through the secondary nipple and valve will
inflate the pneumatic tube and diaphragm so that the diaphragm will be extended to
and cover the inner side of the pneumatic tube toward the road surface.
When by reason of puncture deflation of the pneumatic tube takes place the rider,
dismounting for a time, will connect the air pump to the secondary valve and by
means of the pressure on the upper side of the semi-tube the same will assume
position covering the inside surface of the pneumatic tube towards the road surface
of the tyre so covering the puncture and enabling the rider to continue his journey,
leaving the "patching" of the puncture to be effected at leisure and the tyre again
prepared for a similar eventuality.
поцир
Дейша
угов,
I WILLIAM WALKER FYFE of 41 Hillside Road, Stamford Hill, London N.
Engineer, 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 pneumatic tyres for wheels
such as are used for cycles, invalid chairs or the like.
For the purposes of my invention I employ interiorly of such tyres a semi-tube
or diaphragm extending from side to side of said tube and the sides or outer
edges of the said semi-tube or diaphragm are to be secured to the inside on the
opposite sides of the said pneumatic tube.
The normal position of the diaphragm will when the inflation of the pneumatic
tube is established, by way of a nipple and valve, and maintained, be against or
toward the rim of the wheel inside the tube.

page_text: In addition to the said nipple and air-valve a second nipple and valve are provided
leading to the reverse side of the diaphragm, that is on the side thereof towards the
rim of the wheel, so that air pumped-in through the secondary nipple and valve
will inflate the pneumatic tube and diaphragm so that the diaphragm will be
extended to and cover the inner side of the pneumatic tube towards the road
surface.
When, by reason of puncture, deflation of the pneumatic tube takes place,
the rider dismounting for a time will connect the air pump to the secondary
valve and by means of the pressure on the upper side of the semi-tube the same
will assume position covering the inside surface of the pneumatic tube, towards
the road surface of the tyre so covering the puncture and enabling the rider to
continue his journey, whilst leaving the "patching" of the punctured pneumatic
tube to be effected at leisure and the tyre again prepared for a similar eventuality.
In the accompanying drawings there are represented diagrams, in cross section, of
constructions of pneumatic tube tyres according to this invention and the same
will be referred to in the following description by figures and letters, like letters
indicating similar parts.
Fig. 1 represents the fitting of a pneumatic tyre when same is in normal con-
dition with the diaphragm folded back against the rim of the wheel and against its
valve and air duct.
Fig. 2 is a like view when the semi-tube or diaphragm is inflated and extended to
provisionally repair a puncture.
Figs. 3 and 3 represent a fitting, in like manner to Fig. 2, but showing two
portions of the rim and pneumatic tyre on opposite sides of a wheel, fitted as to one
portion Fig. 3 with the main pneumatic tube inflation nipple, valve and inflator
ducts leading below the diaphragm; and as to the other portion, Fig. 3, with the
emergency nipple, valve and duct leading directly to the rearward side of the
diaphragm.
Fig. 4 shows in general view the main inflator nipple, valve, and its ducts leading
out below the diaphragm el to the main chamber of the pneumatic tube C, three
ducts on each side being shown. Fig. 4 is a plan of the nipple and ducts shown in
Fig. 4. A, indicates the rim of the wheel to which the spokes and the pneumatic
tyre of the wheel are attached. B the outside cover or road-surface covering of a
pneumatic tyre inflation tube C, whatever may be the attachment-fitting employed.
c is the diaphragm of the pneumatic inflation tube C, said diaphragm being
cemented or attached on each side edges at c², to the inside of the pneumatic
tube C.
The valve duct d is provided to inflate the tube C, and diaphragm c¹, and is
formed with a head d¹ flanged to the inside curve of the rim A, to avoid abrasion
of the diaphragm c', when the tube C, is normally inflated and in use.
The air valve for normal inflation of the tube C, consists of a nipple, valve and
duct e, similar to that last before described, and the head of said duct is provided with
an enclosing bulbous cover e¹, provided with tubular ducts e2, which said ducts e
lead outward from the bulbous cover e¹, interiorly of the pneumatic tube C, below the
points at which the diaphragm c¹, is cemented or attached to the sides. In.practice
these ducts are cemented to the inside surface of the tube C, and over them at the
points where said ducts are placed or laid the edges of the diaphragm c¹, are cemented
but leaving the open ends of the ducts free, so as to leave clear passage way from the
nipple and bulbous-valve-cover through the ducts e².
In order to avoid any accidental stoppage of the passage of air to the main
pneumatic tube C, several of the ducts et, leading from the bulbous cover of the main
inflation nipple and valve are provided such as are shown in Figs. 4 and 4*.
When the tyre is to be inflated for normal use, or after "patching" bas been done,
the valve dd, should be slightly opened so as to allow of the gradual escape of the
air contained in the tube C, on the reverse side of the diaphragm. As the inflation
proceeds the diaphragm will be snugly pressed back into its folded position out of
use, and the placing of the valves on opposite sides of the wheels will facilitate this.

page_text: According to a modification of the construction the bulbous air chamber e¹, and its
ducts e, may be made solid with the tube C, ready for the insertion of the head d' of
the nipple and valve so that in the event of failure of the valve another valve and
nipple may be readily applied.
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 [
claim is :-
In pneumatic tyres for wheels the diaphragm c, attached interiorly and extending
from side to side of the inflation tube C, fitted with the main nipple and valve and
air chamber el, and inflator ducts e, for normal inflation and the direct nipple and valve
duct d d', serving to inflate the diaphragm and inner portion of the tube C, constructed
combined and operating as and for the purpose herein described in reference to and
shown by the drawings.
Dated 6th day of May 1897.
In the presence of Walter A. Barlow,
WM, W. FYFE.
Consulting Engineer and Patent Expert, 306, High Holborn, London, W.C.