Improvements in Pumps.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pumps.
I, HARRY MORRISON 36 Buckingham Road, Stratford, Engineer, do bereby declare
the nature of this invention to be as follows:-
This invention relates to improvements in pumps for inflating tyres and other
purposes and consists in providing the head of the plunger or pistou with a valve
which will open or close ports in the piston head which communicate with the interior
of the piston rod, so that the pump is effective in both directions of motion.
Suitable inlet valves are provided at the ends of the cylinder.
The interior of the hollow piston rod communicates with the exit or delivery tube.
Dated this 21st day of November 1806
E. EATON,
Agent for Applicant,
T, HARRY MORRISON 36 Buckingham Road Stratford London, E., Engineer, do
hereby declare the nature of this invention and in what manner the saine is to be
performed, to be particularly described and ascertained in and by the following
statement:
-
This invention relates to improvements in pumps for inflating tyres and other
purposes and consists of providing the head of the plunger or piston with a valve
which will open or close ports in the piston head which communicates with the
interior of the piston rod so that the pump is effective in both directions of motion.
Suitable inlet valves are provided at the ends of the cylinder.
The interior of the hollow piston rod communicates with the exit or delivery tubes.
In order that my invention may be fully understood, I will refer to the annexed
drawings, in which
Figure 1. is a longitudinal section of my improved pump. a is a hollow piston
hend having apertures b,c,dl being a movable washer of leather or other suitable material
so arranged as to close the apertures b or c according to the direction of the motion of
the piston. e & f are inlet valves for the ingress of air to the cylinder g. The
piston rod a is hollow being the aperture for the outlet of the air. It will be scen
that by moving the piston in the direction of the arrow 1 air will be drawn into the
cylinder through the valves e and at the same time the washer will close the
apertures c and the air which is compressed will pass through the apertures b to
the outlet h through the hollow piston rod aforesaid. Upon moving the piston in the
opposite direction of motion tho movable washer will close the apertures b and the

page_text: compressed air will pass through the apertures c into the hollow piston rod and
thence to the outlet. Although for purposes of illustration I have described my
invention as applied to an air pump it will be readily seen that the construction of
the piston head may be employed. for other purposes and that either a gaseous or a
fluid medium will effect the operation of the valve when same is in use.
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:
1. The combined construction and arrangement of the various parts substantially
as described and illustrated herein.
2. In pumps or the like: a hollow piston head provided with apertures; a movable
washer inside piston head so arranged as to close the apertures in either face of the
piston hend according to the direction of motion of the piston inlet valves upon
the cylinder in which said piston works; said piston being hollow and provided with
an outlet or outlets for compressed air.
E. EATON.
Agent for Applicant.