Year: 1887

page_text: Date of Application, 23rd Mar., 1887
Complete Left, 22nd Dec., 1887
Complete Accepted, 27th Jan.. 1888
I THOMAS LAMBERT of 79 Lisson Grove, Mutley, Plymouth, Devonshire, Engineer,
do hereby declare the nature of this invention to be as follows:-—
My Invention relates to improvements in rotary engines whereby economy and
other advantages are obtained.
In carrying out my Invention I employ two cylinders mounted on the same line of
axis-with a dividing piece-preferably hollow-fixed between their ends and of the
same width as the crank-disc which works in contact at its periphery with the dividing
piece bored out to suit it, the two forming a division between the cylinders.
On the outer ends of the cylinders are covers cast with central discs or rings of
suitable diameter and extending to the division between the cylinders forming contact.
with the face of the crank disc, thereby constituting between the outer periphery of
central discs or rings annular spaces-The cylinder covers also carry suitable bearings
for the main shaft or axis which extends through both cylinders.
On the main shaft or axis is mounted fast the crank disc to which rotary motion is
to be imparted.
The crank disc is formed with a cylindrical ring cast on each side also extending
the length of each cylinder and working in contact at their ends with the faces of
the cylinder covers-The crank disc with rings being mounted eccentrically to the
centre of the cylinders divides each into two chambers viz.-Inner chambers
comprized within the eccentric ring and the discs cast on the cylinder covers-and
outer chambers constituted by the space between the outside of eccentric rings an I
the bore of cylinders.
The blocks or pistons being recessed for slides which work loose around the pins
fixed on the faces of crank disc are common to both chambers-The eccentric rings
attached to the crank disc being slotted for that purpose.
The steam or other expansive fluid is first admitted to the inner chambers through
suitable ports in the cylinder covers so as to act on one side of the blocks or pistons
which are thus caused to move round in contact with the bore of the cylinders turning
with them the crank-disc and rings attached thereby imparting rotary motion to the
main shaft or axis.

page_text: At a suitable point in the revolution the steam or other expansive fluid is cut off
and the revolution continued by expansion-At a further point of the revolution a
portion of the steam or other expansive fluid is allowed to pass from the inner to the
outer chambers and there also to act on the blocks or pistons. The steam or other
expansive fluid being finally exhausted from the inner and outer chambers into the
hollow division between the cylinders and from there into the condenser or atmosphere
as desired There are two main ports to each inner chamber, one of which acts as
the induction port and the other as the eduction port when the engine is running in
one direction, whilst the induction port becomes the eduction port and vice versa
when the engine is running in the other direction.
There are also two ports connecting the inner and outer chambers of each cylinder-
One port acts for the passage of steam or other expansive fluid from the inner to the
outer chamber during expansion-whilst the other acts as exhaust port from the outer
chamber and vice versa as the engine runs in the other direction.
I employ to control the induction and eduction ports of the inner chambers, also
the ports connecting the inner and outer chambers, rotary valves mounted on spind:s
having their bearings in the ends of valve chests fixed to the outside of the cylind. r
covers The valves receive motion by suitable gearing mounted at one end of the
valve chests and connected to the main shaft or axis-At the other end of valve
chests I place a reversing sliaft to which all the aforementioned valves are connected
and by which they are all controlled.
L 100"

page_text: COMPLETE SPECIFICATION.
Improvements in Rotary Engines.
I, THOMAS LAMBERT of 79 Lisson Grove, Mutley, Plymouth Devonshire, 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 improvements in reversible rotary engines whereby
simplicity economy and other advantages are obtained.
I construct my engine with two cylinders placed on the same line of axis, with a
dividing piece, preferably hollow fixed between their ends, and of the same width as
the crank disc, which works in contact at its periphery, with the dividing
piece (C), which is bored out to suit it, the two forming a division between the two
cylinders.
On the outer ends of the two cylinders are covers cast with central discs or rings
of suitable diameter, and extending to the division between the cylinders forming
contact with the face of the crank disc, thereby constituting between the outer
periphery of central discs or rings, annular spaces.
The cylinder covers also carry suitable bearings (S) for the main shaft, which
extends through both cylinders.
On the main shaft is fixed the crank disc (A) to which rotary motion is to be
imparted.
The crank disc is formed with a cylindrical ring (H) cast on each side, also extending
the length of each cylinder, and working in contact at their ends, with the faces of the
cylinder covers (B). The crank disc (A) with its rings being mounted eccentrically
to the centre of the cylinder, divides the cylinder into two chambers; viz., (1) the
inner chamber (F) comprised within the eccentric rings (H) and the discs cast on
the cylinder covers; and, (2) the outer chamber (I) consisting of the space between
the outside of the eccentric rings and the outer wall of the cylinder.
The block or piston (W) being recessed for slides (E) which work loose around
the pin (D) fixed on the face of the crank disc, is common to both chambers, the
eccentric rings (H) attached to the crank dise being slotted for that purpose.
To prevent leakage in the valves (V) I employ the loose sleeves (e) which form a
loose lining for the ports (P) and which are sprung up against the valves, keeping
them tight, and closing the ports when the valves turn round.
The division between the two chambers is kept tight by means of the two circular
rings (G) and shoes-(G), which are pressed tight against the face of the piston, by a
spring or by a fluid pressure.
The slack and consequent leakage which might arise from the friction of the wearing
parts (A and B), is provided for by set screws (T) which enable the wearing parts
to be tightened up, thus obviating the necessity of employing packing rings for the
crank disc.

page_text: which is then caused to move round in contact with the wall of the cylinder turning
with it the crank disc and rings attached, thereby imparting rotary motion to the
main shaft.
At a suitable point in the revolution, the steam or other expansive fluid is cut off
and the revolution continued by expansion. At a further point in the revolution a
portion of the steam or other expansive fluid is allowed to pass from the inner to the
outer chamber, and there also act on the blocks or pistons.
The steam or other expansive fluid being finally exhausted from the inner and outer
chambers into the hollow division between the cylinders, and from thence into the
condenser or atmosphere, as desired.
There are two main ports to each inner chamber, one of which acts as the induction
port, and the other as the eduction port, when the engine is running in one direction,
while the induction port hecomes the eduction port, and vice versa, when the engine
is running in the other direction.
There are also two ports connecting the inner and outer chambers of each cylinder.
One of these ports acts for the passage of steam or other expansive fluid from the
inner to the outer chamber during expansion, while the other acts as exhaust port
from the outer chamber and vice versa when the engine runs in the other direction.
To control the induction and eduction ports of the inner chamber also the ports
connecting the inner and outer chambers, I employ rotary valves mounted on spindles
having their bearings in the ends of valve chests fixed to the outside of the cylinder
covers. These valves receive motion by suitable gearing mounted at the end of the
valve chests and connected to the main shaft.
At the other end of the valve chests I place the reversing shaft, to which all the
before mentioned valves are connected, and by which they are all controlled.
In the accompanying drawings,
Fig. 1, is an elevation of my Engine, half being shown in section.
Fig. 2, is an end view of same, half being shewn uncovered.
A shows the crank disc.
B
D
F
G
G¹
H
1
K
L
M
N
0
2 2 2 2 2 2 2 2 2 2
"
"
cylinder cover.
dividing piece.
"
crank pin.
slide in which D works.
27
inner chamber.
>>
دو
circular ring.
shoe in which G works.
eccentric ring on crank disc.
main shaft or axis.
steam escape pipe.
"
outer chamber.
"
"
"
"
33
31
reversing motion, shewing motion of valves with reference to ports.
valves of the reversing motion.
shaft pinion for reversing.
hollow passage for steam to valve chest.
„ports between the two chambers.
ports which are connected with the rotary valves V.
exhaust ports.
bevelled wheels which convey motion to the rotary valves.
"
"
">
"
bolt sockets.
22
"}
""
دو
bearing of main shaft.
set-screws for adjusting slack.
rotary valves.
2
loose sleeves.
"
W
Y
"
::
outer wall of cylinder.
"piston block.
packing of cylinder cover B.

page_text: 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 a rotary engine the two cylinders Z and the crank disc A, with the eccentric
rings H, forming a division between the inner and outer chambers substantially as
herein explained and set forth.
2. In a rotary engine the special form of loose piston W, working on the crank pin D,
as herein explained and set forth.
3. In a rotary engine the special form of rotary valve V, acting in combination
with special ports 1", as herein explained and set forth.
4. In a rotary engine the loose sleeve e forming a loose lining for the ports Pl, as
herein explained and set forth.
5. In a rotary engine the arrangement of the parts B and cylinder Z whereby the
slack caused by the wear between the cylinder cover, the crank disc, and the face of
the piston, is taken up, and packing round the disc dispensed with, as herein explained
and set forth.
6. The general arrangement and combination of parts, as herein explained and
set forth.
Dated this 22nd day of December 1887
S. S. BROMHEAD,
97, Newgate Street, E.(.,
Patont Agent.