Improvements in Air Pumps for Inflating the Pneumatic Tyres of Cycles and other Vehicles.
Year: 1897

page_text: Date of Application, 20th July, 1897
Complete Specification Left, 7th Sept., 1897-Accepted, 16th Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Air Pumps for Inflating the Pneumatic Tyres of
Cycles and other Vehicles.
I, CHARLES DISs, residing at No. 231 Fifty-third Street, Brooklyn, in the State
of New York, United States of America, Machinist, do hereby declare the nature
of this invention to be follows:-
such
Bicycle tyres occasionally become imperceptibly deflated and therefore
require additional inflation while in use, and it is common to provide
a pump to be carried by the cyclist for inflating the tyre;
pumps, however, have usually been single acting, and considerable time is
necessarily employed in the inflation of the tyre, and in addition to this the cycle
pump is advantageously light and is hence more liable to be indented or otherwise
crippled for use.
The object of the present invention is to provide a double acting pump with a
surrounding case by which the pump barrel is protected from indentation or
injury, and at the same time an air chamber is provided between the pump barrel
and the case, and the case is removable so as to give access freely to the valves
for cleaning, or repair.
The pump cylinder is of suitable size, and it is provided with end collars, and a
discharge pipe extends out from the case and is provided with a flexible tube and
nozzle for connection with the cycle air valve.
The heads screw upon the end of the case and there are intermediate washers,
and one head is provided with a stuffing box through which passes the piston rod,
and the piston has a double cupPleather.
The inlet valves are upon the inner surfaces of the heads; they are preferably
made of leather and provided with springs.
The exit valves are upon the exterior surface of the pump cylinder; they are
preferably spring tongues with enlarged ends surfaced with flexible material.
The valves and other parts are easy of access for repairing or cleaning.
The pump being double acting is adapted to the rapid inflation of the pneumatic
tyre, and can be used in a house, or factory, or be carried on a cycle.
1000
35 Improvements in Air Pumps for Inflating the Pneumatic Tyres of
Cycles and other Vehicles.
I, CHARLES DISs, residing at No. 231 Fifty-third Street, Brooklyn, in the State
of New York, United States of America, Machinist, do hereby declare the nature
Price Sd1

page_text: of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:
Bicycle tyres occasionally become perceptibly deflated and therefore require
additional inflation while in use, and it is common to provide a pump to be carried
by the cylist for inflating the tyre; such pumps however, have usually been 5
single acting, and considerable time is necessarily employed in the inflation of the
tyre, and in addition to this the cycle pump is advantageously light and is hence
more liable to be indented or otherwise crippled for use.
The object of the present invention is to provide a double acting pump with a
surrounding case by which the pump.barrel is protected from indentation or injury 1
and at the same time an air chamber is provided between the pump barrel and the
case, and the case is removable so as to give access freely to the valves for cleaning
or repair.
1
The pump cylinder is of suitable size and it is provided with end collars, and a
discharge pipe extends out from the case and is provided with a flexible tube
and nozzle for connection with the cycle air valve.
The heads screw upon the end of the case and there are intermediate vashers and
one head is provided with a stuffing box through which passes the piston rod and
the piston has a double cup-leather.
The inlet valves are upon the inner surfaces of the head; they are preferably
made of leather and provided with springs.
The exit valves are upon the exterior surface of the pump cylinder; they are
preferably spring tongues with enlarged ends surfaced with flexible material.
The valves and other parts are easy of access for repairing or cleaning.
The pump being double acting is adapted to the rapid inflation of the pneu-
matic tyre and can be used in a house, factory or carried on a cycle.
In the drawing, Figure 1 is a longitudinal section of the improved air pump.
Fig.
is a cross section at the line 2, 2, of Fig. 1, and Fig. 3 shows one end of
the pump cylinder with a valve upon it.
The pump cylinder A is of suitable size and it is provided with end collars or
flanges 3 fitting closely within the exterior cylinder or case B; but the pump
cylinder is easily removable from the case, and the discharge pipe C extends out
from the case B at any convenient place, and it is usually provided with a flexible
tube and a nozzle to fit the air valve of the cycle.
The heads E and F are screwed upon the ends of the case and there is a washer 4
at each end, so that by screwing on the head the washer is confined against the
end 3 of the pump cylinder and against the end of the case B, so as to make the
parts air-tight at these places, and the piston G is provided with a double cup-
leather, and the rod H passes through. the gland or stuffing box at the head F so
as to make an air-tight connection at this point.
The inlet valves 6 and 7 are upon the inner surfaces of the heads E and F, and
they are preferably made as part of the leather or rubber. of the washers 4 as
illustrated in Fig. 2, and these valves open inward and may each be provided
with a spring 8 to press the valve to its seat, the seat being formed by the interior
surface of the head-E or F, the air inlet being a hole through such head.
The valves 10 and 11. are upon the exterior surface of the pump cylinder A and
preferably in the form of a spring tongue with an enlarged end, and the flexible
surface of rubber or leather in contact with the exterior of the pump cylinder,
the spring tongue being soldered or otherwise firmly attached at the distant end
from the valve so as to hold the valve to its seat, but to allow the valve to yield
by the pressure of the air within the pump cylinder when the piston is
reciprocated.
It will now be understood that the valves 6 and 7" are easy of access by taking
off the heads E and F, and the, valves, 10 and 11 being upon the exterior surface
of the pump cylinder A can be cleaned or repaired when the cylinder A is drawn
+
1.2

page_text: out from the case B, and the parts can be easily put together, and they are
rendered air-tight by the washers when the heads are screwed into position.
This air-pump being double-acting is adapted to the rapid inflation of the
pneumatic tyre, and it is not liable to get out of order and it is easily repaired
because the valves are accessible, and it will be understood that any concussion
that might dent or injure an ordinary pump cylinder, is received by the case B,
and the pump cylinder itself is thereby protected. These air pumps, although
primarily intended for use in a house or factory, may be made sufficiently small
to be carried conveniently on the cycle.
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. The combination in a pneumatic pump, of a cylinder having end collars
and valves on the exterior of such cylinder and near the ends, a case surrounding
the pump cylinder and the collars and forming an air chamber between the case
and pump cylinder, heads screwed upon the case and washers intervening between
the heads and the ends of the case and pump cylinder, and inlet valves within
the heads, substantially as set forth.
Second. The combination in a pneumatic pump, of a case, a pump cylinder and
end collars within the case, valves on the exterior of the pump cylinder and near
the ends, heads screwed apon the case, washers intervening between the heads
and the ends of the pump cylinder and valves formed of the material of the
washers and covering the holes through the respective heads, substantially as set
forth.
Third. My improved double acting pump, substantially as hereinbefore described
and shewn with reference to the annexed drawings.
Dated this 7th day of September 1897.