Rotary Motor and Pump.
Year: 1889

page_text: Date of Application, 11th Nov. 1889
Complete Specification Left, 8th Sept., 1890-Accepted, 11th Oct., 189u
PROVISIONAL SPECIFICATION.
Rotary Motor and Pump.
EDWARD THOMAS ULEATHERO 34 Malpas Road Brockley in the County of Kent
Engineer do hereby declare the nature of this invention to be as follows:-
In constructing rotary in stors and pumps according to my invention the rotating
shaft is carried in the centre of the cylinder on which a boss with three four or more
projecting arms is fixed. By preference I use four arms divided out in equal parts
round the cylinder. The outer ends of the arms are the same radius as the cylinder.
On one side of each arm near its outer radius I form a recess, hinged joint, or flange.
The other side of each arm is circular being struck to a radius from the centre of the
recess or hinged joint of the opposite arm. A segment fits into the recess or hinged
joint at one end the other end of the segment slides against the radius of the arm
facing. The ends or covers of cylinder have recesses formed eccentric to the diameter
of the cylinder in which one end of the segment is supported by means of projecting
lugs or rollers. The shaft is supported in be rings on the two ends or covers of the
cylinder & the axis of the shaft is concentric with the diameter of the cylinder. I form
each segment by proference the same diameter as the cylinder or may be flat. As the
shaft revolves the segments gradually open inwards as each moves towards the inlet &
close outwards at the outlet at the opposite side of the cylinder. This is done by one
end of each segment being supported on the outer diameter of the arm & the other end
of each segment being supported by projecting lugs or rollers sliding in the eccentric
recess formed in the ends or covers of the cylinder.
In describing it as a motor or pump 1. may also use it as a blower or air pump.
1. 1.:
1000
E. T. CLEATHERO.
COMPLETE SPECIFICATION.
Rotary Motor and Pump.
I, EDWARD THOMas (leathero, 34 Malpas Road, Brockley, Kent, Engineer, 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 an improved construction of rotary motor engines, also
applicable as pumps, which I will proceed to describe with reference to the accom-
panying drawings, in which Fig. 1 shews a transverse section and Fig. 2 a longitudinal
section.
Within a cylindrical casing A is a central shaft B carrying a boss with four curved
arms CCC, the outer ends of which fit against the circumference of the casing.
In the four equal spaces hetween the said arms are four curved flaps D' D³ D³ D+ that
are hinged at H to one of the arms C, and in turning on such hinge, slide with their
other edge against the surface of the opposite arm (, the curvature of which is struck
from the centre of the hinge H; this hinge may be conveniently formed by a
senicylindrical hollow in the arm (, into which fits a cylindrical boss on the flap, as
shewn.
The ends of the flaps fit close against the end covers A' of the cylinder. In these
covers are formed annular grooves which are eccentric to the shaft B, and in these
grooves run rollers F carried by brackets G on the flaps D, so that as the arms C
revolve with the shaft, carrying the flaps D round with them, these will be caused by
the rollers running in the grooves, to move alternately from the extreme inward

page_text: position shewn at D' to the extreme outward position shewn at D³, and thence back
into the position D'.
Assuming the apparatus to be used for propelling or exhausting liquids or gases, and
that I is the inlet branch and J the discharge branch of the casing, then on driving the
shaft in the direction of the arrow Fig. 1, it will be seen that as the flaps approach the
inlet 1, they will move inwards, thus taking in liquid or air &c. until they arrive in
the extreme inward position at D'; they will then begin to move outward again but
only very slightly at first, until the inner edge of the arm 0 begins to pass the edge.J¹
of the discharge opening J. after which in moving outward they will discharge the
liquid into the outlet J, assuming the extreme outward position in which their curved
surface fits against the casing when they arrive in the position D³.
The above described construction is more particularly applicable as a pump, in which
the shaft B is driven. For applying the invention as a steam engine, I prefer to
modify the form of the groove E and the inlet and outlet I and J as shewn at Fig. 3.
It will be seen that the groove E is here made of a cam shape, such that by the time
the flap D has arrived at the position shewn the communication of the space between
it and the casing is nearly cut off from the steam supply I, so that on a slight further
motion it will be entirely cut off, and the enclosed body of steam will then act by
expansion until the arm (has arrived with its left hand edge at the upper edge of the
exhaust port J, whereupon the expanded steam will escape. In this application the
edges both of the armis C and the flaps D may be made with grooves containing
suitable spring packing.
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 :-
In a motor engine or pump the combination with a cylindrical casing A having an
inlet I and outlet J, of a central shaft B with curved arms C fitting the easing and
carrying hinged flaps D, which in moving in and out work with their edges in contact
with the curved surface of the arms and the end covers of the cylinder, the alternate
outward and inward motion of the flaps for taking in and expelling fluid being effected
by rollers or lugs thereon running or sliding in eccentric grooves in the end covers of
the casing, substantially as herein described.
Din 9th day at Sontainer 1800
ABEL & IMRAY,
Agents for the Applicant.