An Improved Reversible Rotary Motor with Variable Speed.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Reversible Rotary Motor with Variable Speed.
I, LE VICOMTE PIERRE ROGATIEN DE LAMBILLY, of 6, Rue de Sully, Nantes, in
the Republic of France, Engineer, do hereby declare the nature of this inven-
tion to be as follows:
-
This invention has for its object an improved rotary motor having a variable,.
speed and which may also if desired be reversed or run backwards.
Hitherto the drawbacks presented by rotary motors were (1) the want of tight-
ness (2) the rapid wear of the parts.
With my rotary motor on the contrary, I obtain a perfect tightness by means
of pistons with hermetical joints and by the arrangement of these pistons them-
selves in movable parts I avoid the great wear which is found in ordinary rotary
motors.
Independently of the two results hereinbefore mentioned I have arranged my
motor in such a way as to enable it to be reversed or run backwards by changing
the feed of steam for the exhaust and vice versa.
The body of the motor is formed of two parts connected by screw bolts. The
left hand part which forms the foot receives a plate or plug having stuffing
boxes. One of these stuffing boxes is traversed by a spindle attached to the dis-
tributing valve and the other stuffing box is traversed by the motor shaft which
has a collar with a peripheral groove running half round and which shaft also
carries at one end the piston tube or ring. This left hand part of the motor..
comprises also a steam inlet which conveys steam to the grooved collar from
whence it escapes at each revolution of the latter by means of a certain number
of holes in the valve according as it is desired to obtain a movement forward.or
backward of the pistons and consequently of the motor shaft.
As hereinbefore stated the valve holes serve alternately and at will for the
admission or discharge of steam. Supposing that steam be admitted by one set
of holes, it will penetrate into the left steam passage of the right hand part of
the motor, will actuate the pistons of the tube or ring which it will cause to
turn and will escape by the opposite steam passage and then by the other set of
holes in the valve which are in communication with the steam exhaust passage.
arranged in the left hand part of the motor.
;
For the reverse movement the distribution is effected by means of the valve
holes in the opposite way (the valve having been adjusted for this purpose by
means of the valve spindle) the steam being admitted into the right hand steam
passage and passing through the valve holes which in the previous case acted for
feed but which have now become exhaust holes, and escapes at the exhaust.
passage as in the preceding case.
The construction and the movement of the tube or ring having the pistons and
which is mounted in the right hand part of the motor will be now described.
The tube or ring is closed at one end by a plate having a groove in which slide
.:

page_text: (either with slight friction or by means of roller bearings or ball bearings) the
head of the pistons. In order to maintain the pistons and their heads in the
respective bearings a cap or cover is placed over the plate. To admit of the
pistons moving towards the centre of the motor, the piston tube or ring is pro-
vided with two cross groves diametrically opposite one another.
The pistons or pallets may be formed in various ways but comprise in all cases
a head or piece travelling in the grooves previously mentioned, and two or three
joints or packing pieces movable in the pistons, the lateral ones bearing against
the walls of the frame and the others bearing against the bottom of the recess or
groove formed in the frame for the revolution of the piston tube or ring.
The movable joints or packing pieces are maintained in contact with the frame
by antagonistical springs lodged and held in grooves formed in the walls of the
pistons.
Independently of these joints or packing pieces the plate of the piston tube or
ring may also bear against packing pieces suitably arranged for this purpose and
based on the same principle as the preceding joints and partially mounted in the
wall of the frame. After long use if a little wear is produced in the joints or
other parts this wear may be compensated by drawing the parts together by
means of a screw engaged in the cap of the right hand part of the motor.
The rotary motor hereinbefore described may with some small modifications
be arranged for working by means of petroleum or gas, the right of which is
reserved.
Total 1441
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
An Improved Reversible Rotary Motor with Variable Speed.
I, LE VICOMTE PIERRE ROGATIEN DE LAMBILLY, of 6, Rue de Sully, Nantes, in
the Republic of France, Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:―
This invention has for its object an improved rotary motor having a variable
speed and which may also if desired be reversed or run backwards.
Hitherto the drawbacks presented by rotary motors were (1) the want of tight-
ness (2) the rapid wear of the parts.
With my rotary motor on the contrary, I obtain a perfect tightness by means
of pistons with hermetical joints and by the arrangement of these pistons them-
selves in movable parts I avoid the great wear which is found in ordinary rotary
motors.
Independently of the two results herein before mentioned I have arranged my
motor in such a way as to enable it to be reversed or run backwards by changing
the feed of steam for the exhaust and vice versa.
In the accompanying drawings, a rotary motor on a reduced scale is shown,
in which,
Figure 1 is a vertical section of the complete motor;
Figure 2, a transverse section on the line 1-2 of Figure 1 showing the action
of the pistons;
Figure 3, a view of the right hand part of the motor and its cap or end with a
screw for adjusting or regulating it in case of wear; in this same figure the

page_text: movable joints or packing pieces for insuring the tightness in a longitudinal
direction are shown;
Figure 4 is an external view of the piston tube;
Figure 5, an internal view of same;
Figure 6, a section of same with its cap; in this figure the ball bearings of a
piston head are shown;
Figure 7, a longitudinal section and end view of the valve for reversing the
movement;
Figure 8, an elevation and cross section of the collar;
Figure 9 shows the relation of the parts represented in Figures 7 and 8;
Figures 10, 11 and 12 are varieties of pistons which may be employed with
my motor;
Figure 13 is a longitudinal section and end view of a part of the frame forming
a plug and stuffing box and giving passage to the driving spindle of the distri-
buting valve and the lower part forming a passage for the motor shaft:
Figure 14 is an end view of the motor, the end plate being removed;
Figure 15, a partial section of the motor showing the distribution;
Figure 16, a view of the right hand side of Figure 15 showing the distributing
passages.
The body of the motor, as shown in Figure 1, is formed of two parts con-
nected by screw bolts a. The left hand part A which forms the foot receives a
plate or plug B having stuffing boxes BB2. One of these stuffing boxes B' is
traversed by a spindle b attached to the distributing valve C and the other stuffing
box 133 is traversed by the motor shaft 1) which has a collar E with a peripheral
groove running half round and which shaft also carries at one end the piston
tube or ring I. This left hand part of the motor comprises also a steam inlet F
which conveys steam to the grooved collar E from whence it escapes at each
revolution of the latter by means of a certain number of holes u in the valve C
to the valve seat ports cc or d according as it is desired to obtain a move-
ment forward or backward of the pistons and consequently of the motor shaft the
valve C being turned into the required position.
As hereinbefore stated the seat ports c¹ and dd serve alternately and at will
either for the admission or discharge of steam. Supposing that steam be admitted
from the valve holes uu to the one set of seat ports cc it will penetrate through c
into the left steam passage G of the right hand part of the motor, (Fig. 16) and be
discharged through the port ell and actuate the pistons H of the tube or ring I.
which it will cause to turn and will escape through the port d into the opposite
steam passage L and then through the seat port d and valve hole to the central.
exhaust port C which communicates with the steam exhaust passage K (Figure 1).
arranged in the left hand part of the motor.
The steam thus acts on the exterior of the ring but during this time it has
also entered through the port into the passage G¹ (Figure 16) and has dis-
charged into the interior of the ring I by the port g it then actuates the piston
and having caused a revolution to be described, it escapes by the port into the
passage L which it leaves by the seat port d' and enters the central exhaust
port through the other valve hole arranged for this object in order to be dis-
charged as before described.
For the reverse movement the distribution is effected by means of the valve
holes in the opposite way (the valve C having been adjusted for this purpose
by means of the valve spindle b) the steam being admitted into the steam pas-
sages LL (Figure 16) through the ports dd respectively and escapes through
the ports cc which in the previous case acted for feed but which have now
become exhaust holes and escapes at the exhaust passage K as in the preceding
case as shown in Figures 1, 2, 3, 7, 8, 9, 13 and 16.
The construction and the movement of the tube or ring I having the pistons H
and which is mounted in the right hand part of the motor will be now described
with reference to Figures 4, 5, 6, 10, 11 and 12. The tube or ring I is closed

page_text: at one end by a plate H¹ having a groove i in which slide (either with slight
friction or by means of roller bearings, Figure 10, or ball bearings, see Figure 6),
the heads h of the pistons H. In order to maintain the pistons and their heads
in the respective bearings a cap or cover H2 is placed over the plate H¹. To
admit of the pistons H moving towards and away from the centre of the motor,
the piston tube or ring I is provided with two cross grooves j diametrically oppo-
site one another, Figures 2 and 6.
The pistons or pallets as shown in Figures 2, 10, 11 and 12 may be formed
in various ways but comprise in all cases a head or piece H travelling in the
grooves previously mentioned, and two or three joints or packing pieces
movable in the pistons H, the lateral ones 7 bearing against the walls of the
frame A and the others bearing against the bottom of the recess or groove
formed in the frame for the revolution of the piston tube or ring I.
The movable joints or packing pieces are maintained in contact with the frame
by antagonistical springs m lodged and held in grooves formed in the walls of
the pistons.
Independently of these joints or packing pieces the plate H4 of the piston
tube or ring I may also bear against packing pieces n suitably arranged for this
purpose and based on the same principle as the preceding joints and partially
mounted in the wall of the frame A', Figure 3. After long use if a little wear
is produced in the joints or other parts this wear may be compensated by draw-
ing the parts together by means of a screw O engaged in the cap P of the right
hand part of the motor.
The rotary motor herein before described may with some small modifications
be arranged for working by means of petroleum or gas, the right of which is
reserved.
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. In a reversible rotary motor with variable speed, the peculiar arrangement
of a rotary distributor or valve enabling the direction of movement of the motive
fluid to be changed at will and thereby a forward or backward movement of the
pistons and motor shaft to be obtained, substantially as herein before set forth.
2. In a reversible rotary motor with variable speed, the combination of a fixed
cylinder arranged eccentrically as regards the motor shaft and concentrically to
the wall of the encasing cylinder, and a revoluble tube I closed at one end and
traversed longitudinally by two extensible pistons diametrically opposed to one
another, said pistons receiving the action of the motive fluid on the interior and
exterior of said tube I, substantially as herein before described.
3. The method of mounting the body of the cylinder A¹ between the ends A P
of the cylinder to enable it to be adjusted on becoming worn substantially as
described.
4. The general construction and combination of parts, taken as a whole, form-
ing the improved reversible rotary motor with variable speed, substantially as
herein before described and illustrated.
Dotel L
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.