Improvements in Blowing and Pumping Apparatus.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Blowing and Pumping Apparatus.
THOMAS DUNCAN 305 Manchester Street, Oldham, Lancaster, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
I make a cylinder with a mouth piece attached to the side of said cylinder, and
the mouth piece is proposed to be made of a tapered shape fitting on to the side of
cylinder, and the full width of the length of the cylinder. Cylinder to have an
opening corresponding with the mouth piece attached to said cylinder; then I
nake two sides of the required size to cover each end of cylinder, and side of
mouth piece attached to cylinder: on one of the sides of covering for cylinder an
mouth piece I place a bearing or boss opposite centre of cylinder, for carrying a
shaft the one end of which projects through the said side or covering for cylinder
and mouth piece sufficiently for to carry a crank securely fastened on end of said
shaft and made of a diameter corresponding with the diameter of inside of said
cylinder and I affix a pin or stud as near the outside of crank, on end of shaft as is
practical with its requirements, and said pin or stud has to be made the same
length as depth of cylinder, and on the said pin or stud I place a plate
corresponding with the full length of cylinder-plate having a boss on one end
bored out to fit pin or stud in said crank in the inside & planed so as to fit inside
of said cylinder. As the plate revolves the end fitted on to the pin will revolve
inside cylinder, and the other end of the plate will be sliding backwards and
forwards on the bottom side of mouthpiece that is attached to said cylinder, and
when in motion it will make its discharge through a valve or valves fixed on the
top side of mouthpiece affixed to said cylinder, or any other part that may be most
convenient.
Dated this Seventh day of Sontember 1895
Improvements in Blowing and Pumping Apparatus.
I, THOMAS DUNCAN Mechanical Engineer of 305 Manchester Street Oldham
in the County of Lancaster, 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 :-
My invention relates to improvements in blowing and pumping apparatus.
My improved blowing and pumping apparatus consists of a machine in which a
plate moves inside a chamber consisting of a cylinder with an angular opening on
one side of it, the plate being fitted close up to the sides of the said chamber an
moves in such a manner that the end of the plate inside the cylinder has a rotatory
motion given to it in any suitable manner and fits always close up to the bore of the
cylinder. The other end of the plate has in the angular opening a straight line
motion to & fro and by means of this compound motion of the plate, air or other
fluid is drawn through a suitable opening or openings into the chamber and
expelled through a valve or valves placed in a suitable position or positions.

page_text: In the accompanying drawings I have shewn how my said invention may be
conveniently carried into practice.
Fig. 1. is a vertical central section perpendicular to the axis of the cylinder.
Fig. I is a vertical section through the axis of the cylinder.
A is the chamber consisting of the cylinder B and angular opening C, E the end
of the plate D, moving inside the cylinder B, having a rotatory motion given to it by
means of the disc crank G, the disc of which may revolve in a recess of the side I
of chamber and is driven either by hand or power. F the other end of the plate D
moves inside angular opening C in a straight line motion to & fro parallel to the base
of the said angular opening C. The better to keep a tight joint, the end F is placed
inside a block H in such a manner that it can swivel inside said block, the block H
having only a straight line motion without angular motion. The plate D fits close
up to the sides II of the chamber A as also to the disc G in order that as little as
possible of the fluid which is being forced through the machine may escape, J is
the inlet opening for the fluid, while K is the outlet valve.
Fig. III is a vertical section through the axis of cylinder showing an alternative
method of driving and supporting the disc crank G. The disc G is carried on the
end of the shaft L. which revolves in bearings M. M. driven by pulley N. The
bearings being substantially connected to chamber A either by bed plate O or
other means.
The disc G may either move in a recess or as shewn in Fig. III fit
close up to bore of cylinder only.
The apparatus may be modified by using a disc placed on either side of machine
and supported in central bearings to carry the crank motion.
And also these arrangements may be worked single or double as circumstances
require.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed what I claim is.
I. The improved apparatus consisting and combined substantially as described
with reference to the accompanying drawings and operating as and for the purpose
above specified.
II. A plate having such a motion as specified working in a chamber composed of
a cylinder and angular opening.
III. The method of communicating and supporting the disc crank motion
described in Fig. 1. for the purpose of giving motion to the end of plate inside
cylinder.
11. The application of the block to end of plate working in angular opening.
Dated 16th January 1896.
THOMAS DUNCAN.