Improvements relating to Automatic Action Pumps for Inflating Pneumatic Tyres for Cycles and other Vehicles.
Year: 1893

page_text: Date of Application, 13th Nov., 1893
Complete Specification Left, 13th Aug., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements relating to Automatic Action Pumps for Inflating
Pneumatic Tyres for Cycles and other Vehicles.
I, WILLIAM DYSON WANSBROUGH, of St. Catherines, Lincoln, Engineer, do
hereby declare the nature of this invention to be as follows :—
This invention relates to a novel method and appliances for charging pneumatio
tyres of cycles and other vehicles with air in an automatic manner while the wheel
is running.
The invention consists of a pump cylinder affixed to the rim, said cylinder having
perforations covered internally by an india rubber tubing which opens and closes
the perforations alternately from the action of a plunger, the rod of which is
operated by a weight preferably of ring shape carried by the hub of the wheel, and
on which it is free to fall during the wheels rotation. The ring may have wood
or other liner to reduce noise and prevent rattling but it can be guided by side
checks. In any case, a ball or universal joint between rod and plunger will cause
the parts to adjust themselves to the pressure of the weight in falling whether in
a direct straight line, or at an angle.
The pump may also be worked from the ring weight through a lever, or
otherwise, such as by using a larger ring of lighter weight. The lever points,
or either of them may be regulated for the purpose of varying the stroke when
required.
The weight of the ring may be so adjusted to the resistance that when the
desired maximum air pressure is attained, pumping will wholly, or partially cease,
or for effecting the same purpose a relief valve adjusted to blow at the maximum
pressure may be applied, or the ring may be locked in a fixed position when it is
desired to stop pumping.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said William Dyson Wansbrough.
COMPLETE SPECIFICATION.
Improvements relating to Automatic Action Pumps for Inflating
Pneumatic Tyres for Cycles and other Vehicles.
.1, WILLIAM DYSON WANSBROUGH, of St. Catherines, Lincoln, 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 a novel method and appliances for charging pneumatio
tyres of cycles and other vehicles with air in an automatic manner while the wheel
is running.
The invention consists of a pump cylinder affixed to the rim the plunger of which
pump is operated by a weight of ring shape carried by the hub of the wheel, and
on which it is free to fall during the wheels rotation.
My invention will be clearly understood by reference to the annexed drawings.
Figures 1 and 2 show a cycle wheel with a heavy weight ring, and Figures 3
and 4 a cycle wheel with a light weight and larger ring for operating the pump.

page_text: A is a wheel of the usual inflated tyre kind, B a ring hanging loosely on the
hub between the two sets of spokes. C, Figures 1 and 2, ball and socket joint
between ring rod D and pump plunger which is within the pump barrel E, this
being connected to the rim F and having a branch tube G leading to the inflatable
tube.
The ball and socket joint, or it may be any other kind of joint that will allow
of the ring rod D assuming any angle will answer the purpose.
According to Figures 3 and 4, the ring rod D is affixed to a lever H by
which the pump rod or plunger can be operated, the motion being from the pivot
arm I.
I have shown my invention applied to a diamond frame cycle, but it can be fitted
to the wheel or wheels of any other cycling machine having inflated tyres or
tubes as tyres, it being always in or attached to a wheel independently of the
framing.
The action is as follows:-The wheel while rotating takes the pump round with
it and also the ring but since the ring is loose it constantly varies its position on
hub, and by reason of its weight it always keeps itself at the lowermost position,
the centre of gravity of the ring being during the rotation below the centre of the
bub and consequently effects the motion of the pump plunger to keep the tube
inflated to the proper degree.
The ring may have wood, leather, or other liner to reduce noise and prevent
rattling.
The weight of the ring may be so adjusted to the resistance that when the
desired maximum air pressure is attained, pumping will wholly or partially cease,
or for effecting the same purpose a relief valve adjusted to "blow" at the maximum
pressure may be applied, or the ring may be locked in a fixed position when it is
desired to stop pumping.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The herein described improvements relating to automatic action pumps for
inflating pneumatic tubes of cycles, as set forth.
2. The employment of a loose ring or rings, on the hub of a cycle, or like wheel
having an inflated tyre, for automatically operating the inflating pump or pumps
by which the tube or tyre is inflated during the wheels rotation, as set forth and
substantially as shown.
3. The employment of a weight having an opening of larger diameter than the
hub on or by which it is carried, and its connection to a pump for the purpose
set forth.
The 12th low of An 2001
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said William Dyson Wansbrough.