An Improved Air Pump and Couplings for Inflating Pneumatic Tyres for Bicycles and Tricycles.
Year: 1890

page_text: Date of Application, 24th June, 1890
Complete Specification Left. 23rd Mar., 1891-Accepted, 25th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Air Pump and Couplings for Inflating Pneumatic
Tyres for Bicycles and Tricycles.
JAMES MECREDY, M.A., 28, Westmoreland Street, Dublin, do hereby declare
the nature of this invention to be as follows:-
The air pump, or blower, which consists of a brass tube, piston rod, & valve, is
fitted at the nozzle with a movable collar and washer similar to those used in
coupling a garden hose, the pump itself being surrounded by a rubber tube as a
protection from dinges or other injuries. Into the rubber tube through which the
air is pumped into the tyre a small brass tube terminating in a screw head and
protected by a brass cap is inserted & permanently fixed. When the tyre requires
to be inflated a connection can be at once made between the pump and the fixed
tube by means of the couplings and the whole can be as easily & expeditiously
disconnected the cap which screws on to the end of the small brass tube being
fitted with a rubber pad effectually prevents any leakage of air from the inflated
tyre should the valve get out of order.
11
اسين
1
CI
1000
JAMES MECREDY.
COMPLETE SPECIFICATION.
An Improved Air Pump and Couplings for Inflating Pneumatic
Tyres for Bicycles and Tricycles.
I, JAMES MECREDY, M.A., of 28, Westmoreland Street, Dublin, 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 an improved air pump, and also to the method of
applying same, for the purpose of facilitating the inflation of pneumatic tyres for
bicycles, and tricycles.
In carrying out my invention 1 take an ordinary air pump, consisting of a brass
tube, piston, rod, and valve, and at its nozzle I arrange a movable collar, or union
joint, similar to that used in coupling a garden hose.
I then insert in the tube, through which the tyre is inflated a brass tube or
nipple, provided with an outer screw thread at its head to receive a cap, and also a
screw thread on its inner circumference, for the purpose hereinafter described.
This brass tube or nipple may be secured, and made air-tight by binding round
with wire, or other suitable means.
A modification of my said invention consists in simply providing the nozzle of an
ordinary air pump with a male screw thread, and screwing same into the interval
screw thread above referred to, formed in the head of the brass tube or nipple.
The nature and application of my said invention, will be more readily understood
on reference to the accompanying drawings.
Fig. 1, shows (half size) an ordinary air pump provided as described with a
movable collar, or union joint a, in the base of which is placed an india-rubber or
leather washer for the purpose of securing an air tight joint, when charging the
tyre.
Fig. 2, represents in section (full size) the pneumatic tyre, showing brass tube,
or nipple, inserted in position in connection with the air charging valve.
Fig. 3, shows in detail (full size) the brass tube or nipple and cap, the latter

page_text: containing an india-rubber or leather disk to prevent any escape of air when
screwed home to the nipple.
A spiral groove or screw thread is formed round the shank to facilitate its
introduction, and fixture in an air tight manner in connection with the tyre.
Fig. 4, illustrates a modification of my invention, showing an ordinary air pump,
provided with a screw thread at its nozzle, which is simply screwed into the head
of nipple as already described.
According to my invention, when it is desired to inflate the tyre, it is only
necessary to remove the cap from the nipple, and screw on the movable collar, or
union joint of the first described air pump, whereupon a perfect airtight joint is
effected.
The pump being then used in the ordinary manner, the union joint is unscrewed,
and the cap restored.
Or, in the case of the modification of my invention, on the removal of the cap
the nozzle of the pump (Fig. 4) is screwed into the nipple, and the pump used as
before.
It is obvious that the shank of the brass tube or nipple may be dispensed with,
and the head of same secured to, or connected with the pneumatic tyre by any
suitable means; for instance the nipple or head of tube may be secured immediately
to the air valve, or direct to the metal rim of the wheel. This feature however
forming no part of my invention, which consists essentially in the use and applica-
tion of an air pump, constructed and operated as described.
It is also obvious that it is immaterial, to what system of valve, or valves my
said invention may be applied.
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:-
:-
First. In the operation of inflating pneumatic tyres for bicycles, and tricycles,
the use and application of an air pump, provided with a movable collar or union
joint, substantially, as herein described and set forth.
Second. In the operation of inflating pneumatic tyres for bicycles, and tricycles,
the use and application of the modified form of air pump, provided at its nozzle
with a screw thread, substantially, as herein described and illustrated in Fig. 4, of
drawings attached hereto.
Third. In the operation of inflating pneumatic tyres for bicycles, and tricycles,
the use and application of an air pump, provided at its nozzle with either a movable
collar, or union joint, or a screw thread in combination with a brass tube, or nipple,
and cap, arranged, and operating substantially, in the manner as herein described
and set forth.
….ו ...
3001
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicant.