Improvements in Pneumatic Cycle Wheels.
Year: 1893

page_text: Date of Application, 6th Sept., 1893
Complete Specification Left, 6th June, 1894-Accepted, 6th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Cycle Wheels.
WILLIAM PHIMISTER Cabinet Maker 61 Hinton Road Herne Hill London do
hereby declare the nature of this invention to be as follows:-
:-
A rim and spokless pneumatic air cycle wheel which will not bulge at sides but
form a direct line from hub to tyer by means of convoluted tapered air tube which
will be inflated to outer cover which will hold all in true circle.
6th September 1893.
WILLIAM PHIMISTER.
Improvements in Pneumatic Cycle Wheels.
I, WILLIAM PHIMISTER of No. 61 Hinton Road, in the Parish of Camberwell,
in the County of Surrey, Cabinet Maker 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 :-
My invention relates to improvements in pneumatic cycle wheels and the object
of it is to increase the speed of the cycle and to prevent jarring when the going
is rough.
In order that my invention and the means by which it is to be carried into
practical effect may be thoroughly understood, I will now describe it and them in
detail, referring in so doing to the accompanying figures which are to be taken as
part of this Specification and read therewith.
-
Figure 1 is a side elevation of a wheel made according to my invention.
Figure 2 is a section on the line 2-2 of Figure 1.
Figure 3 is a detail in section shewing the union of the spiral pneumatic tube
with the pneumatic tyre.
In carrying my invention into effect I provide two discs of a, b of canvas or
other suitable fabric that will not stretch. Each of these discs is of the diameter
of the wheel and has besides an annular margin sufficiently wide to produce a cover
for the pneumatic tyre. The outer edge of the margin is contracted to the internal
diameter of the tyre and strengthened by the insertion of a wire or other equivalent
The latter
piping c, thereby forming two pockets a', 6' equal to a duplex cover.
of these is intended to receive the pneumatic tyre d and the former, to receive both
the said tyre and the pocket or inside cover b'.
Each disc ay bhas incorporated with it a concentric metal disc not shewn in the
figures, preferably, of the same diameter as the respective flange e of the hub f.
The function of these discs is to provide suitable rigid surfaces to which the hub
flanges can be bolted and by which the wheel can be held to the hub flanges.
The wheel itself consists of a combination with the discs a and b, of a pneumatic
tapered tube of rubber or other suitable material. The larger end of this tube g
is blind and the smaller end makes junction with the pneumatic tyre d. The
tube g is sufficiently long to occupy in conjunction with the material of the spiral
pocket next described when it-the tube-is wound spirally about the hub as a
centre and in the plane of the wheel and after inflation, the annular space between
the said hub fand the tyre d. The spiral pocket in question is formed by leading

page_text: a spiral partition h, of the same material as the discs a and b, from the hub up to
the margin of the discs a and b, i.e., up to the material of the pockets a¹, 61. Both
edges of the partition are piped and eyes i are set thereon at equal distances
apart and opposite each other. I fasten to the partition a series of ties by which
it may be held to the discs a and b and they to it. The ties interspace the eyes.
These ties are, preferably, loops ; which are laced together after the manner of
gaiter fastenings. Each may extend across the partition and does so beyond the
piping on each side far. enough to pass through the next eye i.
The eyes and loops; pass through eyeletted holes in the discs a and b.
The various parts of the wheel having been prepared in the manner specified,
are put together in the following way. One of the discs (the one marked b
according to the figures) is bolted to the inside face of the respective hub flange.
The partition is next laced to it by passing the eyes i and loops j on that side of
it through the respective eyeletted holes in the disc and passing the said loops j
through the bights of the loops j respectively behind them and then through the
eyes i respectively in front of them. This method of lacing produces a continuous
spiral lacing from the hub outwards. The tyre d is next laid in its pocket b¹ and
the spiral tube g in the spiral pocket already described. Care must be taken that
the pneumatic tyre d and the tube g are laid down in such a way that the junction
of the latter with the former shall stand in relation to the direction in which the
wheel is to travel as illustrated in Figure 1 on which the direction of travel is
indicated by the arrow.
The opposite side disc is then bolted to its hub flange and laced to the partition h,
and the tyre d and pocket & pushed into the pocket a¹.
The inflation of both tyre and spiral tube is next proceeded with, after which the
wheel is ready for use.
The rigidity produced by the inflation acting against the unyielding material of
the discs a, b, and partition h, in combination with the outwardly diminishing
diameter of the tyre, obviates all risk of the wheel doubling up or buckling.
Having now particularly described and ascertained the nature of my sand inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with a tyre and hub, of a spirally arranged pneumatic tube
and means for retaining it in the plane of the wheel.
2. The combination with a tyre and hub, of a spirally arranged tapered
pneumatic tube having its larger end next to the hub, and means for retaining
in the plane of the wheel.
3. The combination of pneumatic tyre and spirally arranged pneumatic tube
blind at its inner end and making junction with the tyre with its opposite and
outer end.
4. The combination of side discs and pockets adapted to receive the pneumatic
tyre.
5. The general construction of cycle wheel as set forth.
Dated this 4th day of Contrmban 1001
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.