A Self-acting Inflator for Filling with Air the Tyres of Cycles or other Vehicles and Machines on which Air Tyres are used.
Year: 1892

page_text: Date of Application, 30th Aug., 1892
Complete Specification Left, 30th May, 1893—Accepted, 1st July, 1893
PROVISIONAL SPECIFICATION.
A Self-acting Inflator for Filling with Air the Tyres of Cycles or
other Vehicles and Machines on which Air Tyres are used.
1, JOHN FRANCIS MARIUS KEAN, of 1 Rathdown Terrace, North Circular
Road, Dublin, Ireland, Gentleman, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to a self-acting inflator, whereby the tyres of cycles
or other vehicles or machines may readily be filled by the rotatory motion of the
wheels, and the internal pressure regulated.
The invention consists of an inflator attached to the axle or hub of the wheel,
and in which a piston is worked by an eccentric movement, and the air conveyed
by a conduit tube to the tyre of wheel, and the supply of air can be increased or
diminished by the extent to which the piston is allowed to act and by a safety or
escape valve connected with the conduit tube.
Dated this 20th dor of August 1892
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicant.
COMPLETE SPECIFICATION.
A Self-acting Inflator for Filling with Air the Tyres of Cycles or
other Vehicles and Machines on which Air Tyres are used.
I, JOHN FRANCIS MARIUS KEAN, of 1 Rathdown Terrace, North Circular
Road, Dublin, Ireland, Gentleman, 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 has reference to a self-acting inflator, whereby the tyres of cycles
or other vehicles or locomotive machines may be readily filled or charged with air,
and the internal pressure constantly controlled or regulated by the rotatory motion
of the wheel.
The invention consists of an inflating apparatus attached to the axle or hub of the
wheel, in which the piston is worked by an eccentric movement communicated by
the rotatory motion of the wheel, whereby the air is transmitted through a conduit
tube to the tyre and whereby the supply of air can be increased or diminished
according to requirements.
The accompanying drawings will enable my said invention to be more readily
understood and carried into practice :-
Fig. 1, is an elevation of an ordinary pneumatic tyred cycle wheel showing the
application of my invention; Fig. 2, is an end view of same; Fig. 3, is an enlarged
view of the type of pump I prefer to employ; and Fig. 4, is a detailed view of the
eccentric, the eccentric band, and eccentric rod, and the sleeve which works in
latter as hereinafter more fully described.
Similar letters indicate corresponding parts in each of the views:-a, is the air
pump fixed on the hub of the wheel, the outlet b, of which is connected by a tube c,
to the ordinary inflating valve on the rim of the wheel; e, is the eccentric rod
which is worked by the eccentric e¹, fitted on to the spindle of the wheel. The
upper portion of the eccentric rod is provided with a slot e², in which slides a
sleeve, flanged at one end and threaded at the outer end to receive a suitable nut.
This sleeve works on the crosshead f', and by altering its vertical position the
travel of the piston can be altered at pleasure.

page_text: Thus the position of piston may be regulated so as to give the required pressure
of air to maintain the pressure in the tyre, and in the pump, in a state of constant
equilibrium, and this certain position of piston may readily be fixed upon, which
irrespective of the working of the pump cannot exceed the maximum pressure
required for inflation, so that when the tyre is charged to a pressure equal to that
in the pump no more air can enter, whereas should the pressure in the tyre fall
below the maximum, the pump will supply the defficiency, thereby keeping the
tyre constantly and uniformly inflated, while the wheel is in rotation. In other
words a state of equilibrium is maintained at any desired pressure between the air
in pump and air in tyre ad infinitum.
Should it be desired the pump may readily be thrown out of action by hinging
the eccentric rod at h, and unscrewing the sleeve nut, whereby the rod can be
thrown out of gear, and fixed to a suitable hook in the side of the fork or frame of
the machine.
A suitable valve d, may be provided on the pump tube e, whereby the tyre can
be filled by the ordinary hand inflator.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I would have it understood
that what I claim is :-
:―
First. In the operation of inflating cycle pneumatic tyres, the application of an
ordinary air pump worked by an eccentric on the spindle, whereby the supply of
air is automatically maintained, while the wheel is in motion.
Second. In the operation of inflating cycle pneumatic tyres, the combination
formed by the air pump, the eccentric, the eccentric rol, and the connecting air
tube, all arranged and operating substantially as herein described and set forth.
Dated the 29th day of May 1893.
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicant.