Improvement in Means for Inflating Pneumatic Tyres of Cycles and the like
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvement in Means for Inflating Pneumatic Tyres of Cycles
and the like,
WILLIAM HENRY BELCHER, Commission Agent, 158, Coventry Road, Small
Heath, Birmingham, do hereby declare the nature of this invention to be as
follows;-
A small air pump of any convenient shape and length, fixed, from the outer
end, to the rim of the wheel by the air valve or by means of wire stays which
are made to grip each side of the rim of the wheel close to the air valve, fastened
also at the inner end by wire stays running from the pump round the hub or
centre of the wheel, these stays have a thread and nut on one end, so that the
length may be varied to suit the wheel, the piston rod of the pump is bent at
right angles so as to nearly reach one side of the fork of the wheel, with a small
wheel on the outer end, so that when the cycle wheel revolves and the piston rod
wheel, strikes an angle plate fixed on the fork of the wheel, it will run up over
the plate, whichever way the wheel revolves, and force the air into the tyre at
each revolution, a spring is fixed so as to force the piston rod of the pump out
to its full extent, as soon as it is clear of the angle plate. When not required
the air pump can be held out of action by a small pin. This pump can also be
worked by a lever rod fixed to the pump at one end, and left free at the other 80
as to come into contact with the striking plate on the fork at every revolution
with the same result as before stated.
Dated this 18th day of November 1897.
COMPLETE SPECIFICATION.
Improvement in Means for Inflating Pneumatic Tyres of Cycles
and the like,
I, WILLIAM HENRY BELCHER, of 6, Thavies Inn, Holborn, in the County of
Middlesex, and late of 158, Coventry Road, Small Heath, Birmingham, Com-
mission 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 pumps or inflators for pneumatic tyres so provided
as to be operated on the rotation of the wheel upon which they are mounted.

page_text: The object of the invention is to mount such a pump or inflator upon a pneumatic
tyred wheel in a simple and convenient manner.
The invention consists in the fixture of a pump or inflator for automatic
operation on the rotation of a wheel by securing one extremity of the pump to
the usual air valve projecting inwardly from the rim of the wheel and con-
necting the opposite extremity of the pump to the hub by means of guide rods
or stays secured to a strap encircling the hub, such stays serving the additional
purpose of guide rods for the cross head of the piston which is reciprocated by
means of a connecting rod operated from a fixed eccentric, or by other suitable
means.
The invention is ilustrated in the accompanying drawings in which
Figure 1 represents a part cross sectional elevation of a pneumatic tyred cycle
wheel having a pump or inflator mounted thereupon in accordance with the
present invention, while
Figure 2 is a front elevation corresponding thereto.
In carrying the invention into effect as illustrated in the accompanying draw-
ings, a pump A is provided with a nozzle A', at one extremity secured by means
of a screwed collar B to the air valve C of any ordinary construction which is
provided upon the rim 1 of the wheel. The opposite extremity A2 of the pump A
has screwed therein a plug E serving to guide the piston rod in its travel and to
exclude dust and dirt from entry within the interior of the pump, such plug E
being provided with an orifice or having its central hole provided of such a
diameter as to unrestrictedly admit air on the outward stroke of the piston.
The inner end A2 of the pump A has provided thereupon a flange F either screwed
¡thereupon or abutting against a shoulder provided on its extremity). This
flange F is secured by two stays G and by a connecting strap H to the hub I of
the wheel, nuts g being screwed upon the extremities of the rods G by which
they are effectively tightened or braced. The stays G serve the purpose of
carrying the cross head J to which the extremity of the piston rod K is con-
nected and to which also the extremity of the connecting rod L is secured by
means of a pin M and nut N. The stays or guide rods G may be maintained
spaced apart by means of a bridge or distanco piece O.
In such a fixture of the pump the strap I will adapt itself to any size of hub,
and a slot provided therein will serve to clear the lubricator usually provided
in the centre of the hub no matter what the position of the lubricator relative
to the air valve of the tyre.
Motion is communicated to the cross head J by means of a connecting rod L
whose extremity may be provided with a series of holes or a continuous slot so
that the stroke of the pump may be thereby adjusted. The connecting rod L
is secured to a strap P running within a peripheral groove in the fixed eccentric
disc such disc being mounted upon a spindle R of the wheel and being secured
to the fork S by means of a strap T.
It will be understood that upon the rotation of the wheel D the strap P will
run round the fixed eccentric disc Q and in so doing cause a reciprocation in
each direction for every revolution thereof, the extent of reciprocation and the
quantity of air forced in the tyre being regulated by the means before described.
In the alternative the fixed eccentric disc Q may be provided with a radial slot
so that the degree of eccentricity with the spindle may be varied, thereby pro-
viding for the variation of the extent of the reciprocation of the pump.
After the pump has been inflated to the required degree the connecting rod
may be unfastened from the pin M and turned over on the pin and then
fastened to the fork S by means of a strap U as indicated in dotted lines in
Figure 1 and 2.
When a puncture of the tyre has been made the connecting rod L may be set
Ro as to give a minimum reciprocation of the piston so that on the rotation of the
wheel a continuous supply of air shall be forced into the tyre. In order to avoid

page_text: too great a pressure of air within the tyre a safety valve may be provided so as
to relieve the pressure on a determined degree being exceeded.
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:—
1. A pump inflator for pneumatic tyres arranged and operated substantially
as herein before described.
2. Means for the fixture of an inflator or pump to a pneumatic tyred wheel
consisting in securing one end of the pump to an air valve provided-upon the rim
and the opposite end to the hub by means of stays and a strap, which stays serve
the purpose of guide rods for the cross head of the piston rod to which motion is
imparted on the rotation of the wheel, substantially as and for the purpose herein-
before described.
Total 1171
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.