Year: 1895

page_text: Figure 2, and between the covers q and slides d d¹¹ by means of wearing pieces d
fitted on either side of the slides and held in position by springs d (Figures 7, 8, 9.
and 10). Moreover the longitudinal joints between the piston a and each of the
slides is also rendered airtight by means of a packing plate d (Figures 1, 7-9)
and spring (not shown).
The slides d are provided with a narrow passage de (Figures 2, 7, 8 and 10)
establishing communication between the spaces above and below the slides in order
to facilitate their movement in the slots a' of the piston by permitting the fluid to
pass from the upper to the lower space or vice-versa.
Operation In the position shewn on the drawings, one of the slides dis
projected from the piston a whilst the other d" is entirely withdrawn into the body
of the piston, owing to the pivots d' of the upper slide d being held by the eccentric
groove c¹ of the cover in the most remote position from the axle 6 of the piston,
whereas the pivots d' of the other slide d¹ occupies a position in the groove c¹
'nearest to the axle b. The fluid, steam or water, under pressure entering the
apparatus by the inlet port p in the direction of the arrows (Figure 1) pushes
before it the slide d (shewn at the top of its traverse) and causes the piston a to
.rotate with its axle b. At the same time the pivot d' of the slide d" is moved
along the grooves c¹ of the covers q and when it has passed the inlet port p, it is
moved so as to partially and then entirely close the free space between the cylinder
and piston. Simultaneously the pressure of the fluid acts upon the slide d" whilst
on the other hand the slide d remains in contact with the cylinder c and closes the
space between it and the piston. As the piston continues its rotation the pivots d'
of the slide d travelling in the eccentric grooves c', withdraws the slide gradually
within the piston, allowing the fluid behind it to escape through the outlet r.
When the slide d has passed the outlet it is entirely withdrawn into the piston
and so passes over the bearing piece g. The piston remains in contact with the
bearing piece g so as to close the passage. When the slide d has passed the
bearing-piece g in the direction of the inlet port p it is in turn operated by
the eccentric grooves c¹ and spring d' so as to close the space between the piston
and the cylinder. Motion may be transmitted by the axle 6 of the piston to any
desired machine. A screw g¹ operated from outside enables the position of the
bearing piece 9 to be regulated. The eccentric grooves c¹ of the covers may be
replaced by projections on the interior of the covers (indicated by dotted lines on
Fig. 1) for the purpose of operating the slides.
In the modification shewn on Figure 13 in order to compensate automatically for
wear of the piston c and slides d d", the pivots d' of the latter are movable and
made in a piece with an extensions projecting into and guided in a slot s¹ in each
of the lateral arms of the slides. This extensions is provided with a recess s² in
which is arranged a spring 3 bearing at its upper end upon the slide and pressing
it against the cylinder c. A pin fixed below the extensions prevents the latter
from falling out and allows the slide to be moved away from the axle b so as to
compensate for wear. The pivots d' of the slides are, as in the previously described
arrangement, guided in the grooves c of the covers.
If the apparatus is used as a suction and force pump, the axle operates the
piston a instead of the reverse.
Dated this 29th day of October 1895.

page_text: gure 12, a section through nine 1-1 (or Figure 11) or an adjustable bearing
piece.
Figure 13, a vertical section of a modification of the apparatus.
Figures 14 and 15 are an enlarged vertical section and an enlarged plan of a
part of one of the slides in a modified form.
Figure 16 is an enlarged view of the movable pivot of one of the slides.
As shewn on the drawings my improved apparatus comprises a solid or hollow
piston a keyed upon an axle b and arranged to rotate within a cylinder or casing c.
The piston a has a narrow annular flange a on either side (as shewn on Fig. 4)
arranged to engage in corresponding circular grooves provided on the two
cylinder covers (Fig. 3) in which it forms a close joint by means of a metal
ring (Figure 2) capable of adjustment from the outside by screwed studsz, the
piston a is provided with two or more rectangular slots a¹ (Figure 5) to receive
slides d d of corresponding form. These slides are forced against the outer
cylinder c by springs d¹ (Fig. 1) seated in suitable recesses d² in the body of the
piston a (Figure 5) and are of less depth than those, recesses, they are provided
with pivots d' upon their opposite sides having friction rollers d' (Figures 9 and 10)
arranged to travel in the eccentric grooves c¹ in the two covers q. An adjustable
bearing piece Figs. 1, 2, 11 and 12 is arranged between the inlet port p and
outlet or exhaust r of the cylinder c to close the annular space between the piston
and cylinder and for this purpose it is furnished with a wearing piece g² held by
springs g³ in a longitudinal slot formed on the upper face against the piston
whereby a closure of the passage is ensured.
a
The piston a and slides d. d are of the same width as the interior of the
cylinder c so as to be movable therein without great friction. Air tight closing is
effected between the cylinder covers q and piston a by means of metallic rings c
(Figure 2) and between the covers q and slides d. d" by means of wearing pieces d³,
fitted on either side of. the slides and held in position by springs d' (Figs. 7. 8. 9
and 10). Moreover the longitudinal joint between the piston a and each of the
slides is rendered air tight on the face of the slide approaching the inlet port p by
neans of a packing plate d' (Figures 1. 7 and 9) and spring-(not shown).

page_text: The slides d d are provided with a narrow passage d' (Figures 2, 7, 8 and 10)
establishing communication between the spaces above and below the slides in order
to facilitate their movement in the slots a¹ of the piston by permitting the fluid to
pass from the upper to the lower space or vice versa.
Operation: In the position shewn on the drawings one of the slides d is
projected from the piston a whilst the other d" is entirely withdrawn into the body
of the piston, owing to the rollers ds on the pivots d' of the upper slide d being
held by the eccentric groove e¹ of the cover in the most remote position from the
axle 6 of the piston whereas the rollers d³ on the pivots d' of the other slide d"
occupy a position in the groove c¹ nearest to the axle b. The fluid steam or water
under pressure entering the apparatus by the inlet port p in the direction of the
arrow (Figure 1) pushes before it the slide d (shewn at the top of its traverse) and
causes the piston a to rotate with its axle b. At the same time the pivot d' of the
slide is moved along the grooves c' of the covers q and when it has passed the
inlet port p it is moved so as to partially and then entirely close the free space
between the cylinder and piston. Simultaneously the pressure of the fluid acts
upon the slide d" whilst on the other hand the slide remains in contact with the
cylinder c and closes the space between it and the piston. As the piston continues
its rotation, the pivots of the slide d travelling in the eccentric grooves c¹
withdraws the slide gradually within the piston, allowing the fluid behind it to
escape through the outlet r. When the slide d has passed the outlet it is entirely
withdrawn into the piston and so passes over the bearing piece g, the piston
remains in contact with the bearing piece g so as to close the passage.
slide d has passed the bearing piece g in the direction of the inlet port p it is in
turn operated by the eccentric grooves and spring so as to close the space
between the piston and the cylinder. Motion may be transmitted by the axle 6 of
the piston to any desired machine. A screw g¹ operated from outside enables the
position of the bearing piece g to be regulated. The eccentric grooves c¹ of the
covers may be replaced by projections on the interior of the covers (indicated by
dotted lines on Figure 1) for the purpose of operating the slides.
When the
In the modification shewn on Figure 13 in order to compensate automatically for
wear of the piston a and slides d. d the pivots d' of the latter are movable and
made in a piece with an extension s projecting into and guided in a slot s¹ in each
of the lateral arms of the slides (see Figs. 14. 15 and 16). This extension is
provided with a recess ² (Fig. 16) in which is arranged a springs bearing at its
upper end upon the slide and pressing it against the cylinder c.
A pin s¹ fixed
below the extensions prevents the latter from falling out and allows the slides to
be moved away from the axle 6 so as to compensate for wear. The pivots d' of
the slides are as in the previously described arrangement guided in the grooves c¹ of
the covers.
If the apparatus is used as a suction and force pump, the axle b operates the
piston a instead of the reverse.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In rotary motors or pumps provided with slides for closing the space between
the piston and cylinder, the arrangement in each slide of a passage d establishing
free communication between a slot or recess a¹ under the slide d and the fluid, in
combination with a spring packing-plate d³ provided on the face of the slide
opposite to the fluid inlet.
2. In rotary motors or pumps provided with slides for closing the space between
the piston and cylinder, the combination of eccentric grooves c' in the cylinder
covers for guiding and operating pivots d' of the slides d, d", with a bearing
piece 9, arranged between the inlet port and the exhaust, as and for the purposes
specified.
3. In rotary motors or pumps having pivoted slides d operated by eccentric

page_text: grooves in the cylinder covers, the combination of movable pivots d' arranged upon.
the slides and actuated in a contrary direction thereto by a spring so as to
compensate for wear between the slides and cylinders as well as between the pivots,
of the slides and their guiding grooves.
For the Applicant,
GEDGE & FEENY,
60 Queen Victoria Street, London, E.C., Chartered Patent Agents.