Improvements in the Construction of Air Pumps.
Year: 1893

page_text: Date of Application, 4th Sept., 1893
Complete Specification Left, 4th June, 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Air Pumps.
I, ALFRED WOODS, of 40 Bruchköbler Landstrasse Hanau, O. M. in the
Empire of Germany, Manufacturer, do hereby declare the nature of my invention
to be as follows:-
The object of my invention is to construct a small direct acting air pump in
such a manner that it is suitable for inflating pneumatic tyres, and to so arrange
the pump that a direct action is obtained on two cylinders or pump barrels, and
better facilities provided for the handling and operation of the pump.
I accomplish my object in the following manner, one of the cylinders is provided
for attaching to the pneumatic tyre, and is mounted on a hollow rod upon which
is another cylinder or pump barrel both free to slide thereon.
The cylinders or pump barrels are provided at one end with air tight covers,
those at the other end being perforated, as are also the buckets, one of which is
fitted to each end of the hollow rod and provided with suitable valves.
On taking hold of the pump barrels and moving same to and fro on the hollow
pump rod, air is injected into the tyre, the pressure in the same on the return
stroke of the pumps being retained by a suitable back pressure valve.
Dated this 2nd day of September 1893.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Construction of Air Pumps.
I, ALFRED WOODS, of 40 Bruchköbler, Landstrasse, Hanau, O. M. in the
Empire of Germany, Manufacturer, 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 certain improvements in air pumps, and has for its
object, the construction of a small direct acting pump in such a manner, that it is
suitable for inflating pneumatic tyres, and to so arrange the pump that a direct
action is obtained by two cylinders or pump barrels, and better facilities provided
for the handling and operation of the pump.
In order that my invention may be fully understood, I will describe the same in
detail by making reference to the accompanying sheet of drawings in which
Fig. 1 represents a sectional view of my improved pump in the position
immediately before the return stroke of the buckets, and
Fig. 2 a view of my improved pump with the buckets at the opposite end of the
stroke.
The cylinder or pump barrels A. and A¹ are mounted on hollow rod B. provided
at one end with an air tight cover D. D¹ the opposite ends having perforated
covers E. E the cover D being provided with a threaded projection F. for the
purpose of attachment to the tyre, when in use.
At each end of the before mentioned hollow rod B. are the buckets G. G' which
are also perforated and provided with suitable valves C. C'.
Upon taking hold of the pump barrels A. A' and moving same on the hollow
rod B. in the direction of the respective arrows, the air in the pump barrel passes
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page_text: through the perforations in the buckets G. G¹ and passes the valve into the space
between the respective covers D. and D¹ and valves C. and C. Upon the return
stroke of the buckets G. G¹ the air is forced from the barrel A. through the
hollow rod B. into the barrel A' and along with the air in the latter chamber is
forced into the tyre, where it is retained by a suitable back pressure valve.
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 :-
A pump provided with two barrels A. and A¹ having covers at each end, and
mounted upon a hollow spindle or rod B. fitted at each end with a bucket G. G¹
all arranged substantially as shown and described.
Dated this 2nd day of June 1894.
JOHN WAUGH,
Agent.