Improvements in Pneumatic Tyred Wheels to Facilitate the Inflation of the Tyre.
Year: 1896

page_text: Date, of Application, 21st Sept., 1896-Accepted, 13th Mar.. 1897
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyred Wheels to Facilitate the
Inflation of the Tyre.
1, KELSO KING, of No. 120 Pitt Street, in the City of Sydney and Colony of
New South Wales, Underwriter, do hereby declare the nature of this invention for
"Improvements in pneumatic tyred wheels to facilitate the inflation of the tyre,"
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention refers to those wheels which have an inflatable tyre or as they
are called pneumatic tyred wheels and it relates to certain improvements in the
wheel in the axle aud in the inflators or pumps by means of which the tyres are
automatically inflated while the wheel which retains the characteristics of a
"balanced" wheel is revolved around its non-revolvable axle.
These improvements in pneumatic tyred wheels to facilitate the inflation of the
tyre relating to the wheel consist in the construction upon or integral with the hub
or boss of a central hollow box or casing adapted to completely close around a cam
or other device upon the non-revolvable axle and to support at its periphery a
pump or pumps or other inflators operated by said cam or other axle device.
These improvements in pneumatic tyred wheels to facilitate the inflation of the
tyre relating to the axle consist in the combination and arrangement with or upon
said axle of a central balanced cam or eccentric or the like adapted to gear with or
operate inflating mechanism carried upon a central enlargement of the bub or boss
of the wheel and they further consist in the combination and arrangement with said
axle and said central balanced cam or the like of devices hereinafter particularly
set forth for engaging and releasing' said cam from the axle and for holding said
cam in either position.
These improvements in pneumatic tyred wheels to facilitate the inflation of the
tyre relating to the inflators consist in the special construction of air pumps of
relief or safety escape valve and in the special construction of parts whereby the
air pumps may be easily and quickly attached to an enlargement of the boss and
to the inflating valves of the tyre and be operated by a cam or the like on the
non-revolvable axle.
Not that this invention may be confined to any particular arrangement or
construction of parts within the limits of its nature and scope but that it may be
clearly understood by those skilled in the art to which it appertains drawings
illustrating the manner now best known of carrying it into practical effect are
hereto attached and the said invention will be fully described and explained by
reference thereto.
Figure 1 is a side elevation of a pneumatic tyred wheel constructed according to
these present improvements. Figure 2 is a longitudinal elevation of the hub or boss
of the same and Figures 3 and 4 are respectively central longitudinal sectional
elevation and central transverse sectional elevation of said hub or boss.
Figures 5 and 6 are respectively elevation and central sectional elevation of an
inflator or air pump and connections and the other figures are transverse sectional
plans of the air pump and connections at the points on Figure 6 denoted by
corresponding numbers.
The wheel otherwise than as hereinafter mentioned is of ordinary construction

page_text: and has a hub or boss a spokes and rim and a pneumatic. tyre e while it revolves
upon an axle b. When as shown the wheel is for a cycle the axle has attaching
screws or threads and the hub or boss has a gear wheel a'. The tyre c is
provided with ordinary inflating valve c' and for facility in balancing the wheel
and in operating the inflators or air pumpe this is duplicated and said valves placed
diametrically opposite one another.
The hub or boss a of the wheel is made with a central enlargement or casing A
enclosing or surrounding a cam B on the non-revolvable axle b. In order to effect
the easy making of the casing A the hub or boss is made in two parts each
terminating centrally in half of such casing which are brazed or bolted or preferably
screwed together as at A'. On the outer periphery of this casing A are screwed
sockets A for receiving attaching. ends of the inflators or air pumps and for
allowing the engaging part of the operating mechanism of the inflators to pass or
protrude through to the axle.
Centrally of the axle band within a casing A as hereinbefore described is
balanced cam B on the edge of which normally rest the ends of air pump piston
rods passing through the sockets A' of casing A though said ends might otherwise
engage with said eam as well understood. The cam B might be permanently keyed
or otherwise fastened to the axle as when the piston rods are adapted to be held
out of reach thereof but as shewn it is free to revolve on said axle until it is desired
to make it non-revolvable. In the axle b is a boring or chamber and a slot B' the
inner end of said chamber containing a helical spring the slot holding and guiding a
key piece B upon which said spring presses and the outer part of said chamber
being filled by the screwed-in spindle or shank B of the key piece B and a screw
push piece B having a cap or ornamental head over the axle end. The key
piece B guided and held by slot B' (when the screw B moves outwardly on its cap
being revolved) is forced by the spring into the key way or slot B' of the cain B
and so fastens said cam to the axle until the screw Be is revolved against the
sbank B and against the power of spring pushes the key piece B clear of the key
way B¹ when the cam is again free to revolve.
The inflators or air pumps are preferably in duplicate placed diametrically
opposite one another. Each pump C is in socket A³ of casing A by screwed
end D of distance piece or annulus D whose other end D forms the hend of the
pamp and a thrush for the end of spring D' inserted between snid head and a
flange or recess on the piston rod C so as to keep said rod C¹ normally extended
and the piston at the outward end of its stroke. The outer end of the rod C
carries friction roller Cs and has flanges or shoes C so that said roller will easily
travel on the edge of cam B and will be retained squarely on said edge and will be
guided by ways or slots A in the inner faces of the casing A. The annulus C
protects the spring D³ from injury and the annulus D also is a protector not only
from injury but from dust and dirt as well as a distance piece. The piston is
formed of bucket-shaped leather E between uuts E and E on the end of rod C
the former nut E having admission ports or holes E. Tho inner and discharge
end of the pump has bottom formed of two nuts F and F between which is held
the joint making leather F and through the whole of which is the discharge port
or passage F. Over the outer end of port F' is flap leather F kept to its work
by flat spring F. Inwards of this bottom is cap G screwing into pump end and
making joint ou leather G. A perforated screw G retains a leather or joint
piece G centrally in this cap to receive thereon the end of the connecting pipe H
to the inflating valve c' of the tyre c which is of any ordinary approved self closing
pattern and preferably of that kind known as the "Pneumatic Company's Patent."
This pipe H terminates in a stuffing box H' which in turn screws upon the end of
the stem of the valve c and compresses upon the end of said stem the leather or
packing piece H. When the pump is secured in place on the enlargement or
casing A us before described the pipe H joins it to the inflating valve c. This
junction is effected by slackening the fastening nut 3 of the valve c¹ so that the
stem may be pushed backwardly into the tyre and the stuffing box H screwed

page_text: upon said stem and the nut being then tightened the whole of the joints are
made air-tight. A relief or escape exit is made by a spring clip H' over a leather
or packing H closing a port or hole H3 so that when the tyre is sufficiently inflated
the pump forces the air through said port H' instead of into the tyre.
To inflate the tyre c of the wheel by the above-described devices it is only
necessary to key the cam B to the axle b as before explained and then to revolve
the wheel either with axle held at rest or as generally would be done by propelling
or drawing the cycle or vehicle of which the wheel forms part. The motion of
the wheel causes the piston rods C' (pressed against the edge of the cam B) to
reciprocate the piston in the pump barrel and so force air through the port F
into the tyre.
under flap valve F through the pipe H and through the valve
When the tyre is sufficiently inflated the key B is released from the cam B as
before explained and the wheel will then revolve without operating the air pumps
or inflators.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
First. In a
pneumatic tyred wheel the hub or boss constructed with a central
hollow enlargement or box or casing for the purposes set forth substantially as.
herein described and explained.
Second. In a pneumatic tyred wheel the combination and arrangement with the
axle and midway of the journal thereof of a cam or eccentric or the like for the
purposes set forth substantially as herein described and explained.
Third. In pneumatic tyred wheels the combination and arrangement with the
tyres having inflating valves of one and preferably two air pumps or inflators
connecting to the said inflating valves a central enlargement or casing of the boss.
or bub supporting said pumps and a cam or eccentric or other device on the axle-
within said enlargement or casing adapted to operate said air pumps or inflators
substantially as herein described and explained.
Fourth. In pneumatic tyred wheels the combination and arrangement with an
axle such as 6 having thereon a cam such as B of a sliding spring key such as B
and devices adapted to be externally operated to engage or disengage the said key
and said cam substantially as herein described and explained and as illustrated in
the drawings.
Fifth. In pneumatic tyred wheels the combination and arrangement with a
central hollow enlargement and a central axle cam or operating device of the
mechanical parts forming a spring air pump or inflator and its connections with the
inflating valves of the tyre substantially as herein described and explained and as
illustrated in the drawings.
Sixth. In pneumatic tyred wheels the special combination and arrangement of
mechanical parts all together forming automatic inflating apparatus upon revolution
of the wheel substantially as herein described and explained and as illustrated in
the drawings.
Dated this Fourteenth day of August One thousand eight hundred and