Year: 1897

page_text: Date
Application, 14th Dec., 1897
Complete Specification Left, 25th Aug., 1898-Accepted, 10th Dec., 1898
I, JAMES SCOTT, of 73, Motomachi, Hakodate, Japan, Millwright and
Machinist, do hereby declare the nature of this invention to be as follows:
This invention has for its object to construct an improved rotary engine worked
by both steam and water, the steam and water being used in a continuous cycle,
and which can be easily reversed and which is simple in construction, and consists
essentially in causing steam to pass through a nozzle and, on the principle of
the injector, to draw water with it the resulting mixture of hot water and steam
then acting by impact upon suitable vanes or buckets upon a wheel, the said wheel
being thus caused to rotate and impart motion to the engine shaft. The mixture
of hot water and steam may be passed through a condensing coil to condense the
steam and is then used as the water supply to a second injector nozzle and is
caused by means of live steam to act upon the vanes or buckets a second time.
This may be arranged to take place several times, so as to give several impacts
per revolution to the engine.
According to one method of carrying this invention into practical effect, four
injector nozzles or throat pieces, similar in construction to those used in ordinary
injectors, are arranged, in proximity to a wheel provided with vanes or buckets,
the injector nozzles being in pairs, each two being in line and on opposite sides
of the vane or bucket wheel.
Steam and water supplies are provided for all the injector nozzles but those on
the same side of the vanes or bucket wheel are in each case taken as branches
from main steam and water supplies. Valves are provided, by which the steam
and water are admitted to one or other injector nozzle on each side of the vane
or 'bucket wheel so that the engine will rotate in one direction or the other.
will be seen that the two sets of valves must be connected, to ensure them being
in the same relative positions.
It
The working of the apparatus is as follows: Live steam from the boiler passes
under pressure to the first injector nozzle and there draws water from the water
supply as in an injector, the mixture of steam and water then acting by impact
upon the vane or bucket wheel and causing it to rotate, the resulting mixture of
hot water and steam then passing away through the second injector nozzle which
acts as outlet and through a cooling coil for condensing the steam, and then to
the water supply for the third injector nozzle. Here a further supply of live
steam draws the water and acts again upon the vane or bucket wheel and then
away through the fourth injector nozzle, which acts as outlet. The water and
steam may then pass away or may be used as water supply to the first injector
nozzle the action continuing as before. It will thus be seen that the water is used
in a continuous cycle, the only additional supply being taken as water leaks away
or passes away through the overflow fitted to each injector nozzle.
:
It will readily be seen that by simply reversing the steam and water supply
valves so that the live steam passes to the second and fourth injector nozzles

page_text: instead of to the first and third the engine will rotate in the reverse direction the
first and third injector nozzles then acting as outlets.
Instead of four injector nozzles. being used six or eight or more may be used
and worked in a continuous cycle so that three or four or more impacts may be
given to the vane or bucket wheel per revolution, or even one set of nozzles only
may be used: ff reversing is not necessary outlets only may be provided in the
place of the second and fourth injector nozzles.
The apparatus is arranged within a suitable casing but there is no necessity
for very close joints as the leakage if any, is only of water and is immaterial.
The vanes or buckets are preferably provided with small passages at the base
so that any water carried round with the wheel may easily pass away.
The various places from which water may leak or overflow
together and water may be taken therefrom to feed the boiler.
are connected
It will thus be seen that a continuous rotary motion is communicated to the
vane or bucket wheel and thence to the engine shaft from which power may be
taken to actuate machinery or the like.
Dated this 14th day of Decomber 1807
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.
I, JAMES SCOTT, of 73, Motomachi, Hakodate, Japan, Millwright and
Machinist, 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:-
This invention has for its object to construct an improved rotary engine worked
by both steam and water, the steam and water being used in a continuous cycle,
and which can be easily reversed and which is simple in construction, and consists
essentially in causing steam to pass through a nozzle and on the principle of
the injector to draw water with it the resulting mixture of hot water and steam
then acting by impacts upon suitable vanes or buckets upon a wheel the said wheel
being thus caused to rotate and impart motion to the engine shaft. The mixture
of hot water and stean may be passed through a condensing coil to condense the
steam and is then used as the water supply to a second injector nozzle and is
caused by means of live steam to act upon the vanes or buckets a second time.
This may be arranged to take place several times so as to give several impacts
per revolution to the engine.
In order to clearly describe this invention reference is had to the accompanying
drawing which illustrates in section a rotary engine constructed according to this
invention.
Upon a suitable base plate and casing A the shaft a is mounted and upon this
shaft a is arranged the vane or bucket wheel B having a series of vanes or
buckets upon its periphery. Small passages 61 are formed below each of the
vanes or buckets b. The casing A encloses the whole of the wheel B.
Adjacent to the wheel B and at suitable places injector nozzle C1 C2, C3, C+ are
fitted these being similar in construction to those used in ordinary injectors, the
steam supply being through the pipes D1, D2, D3, 14 and the water supply from
the pipes E, E, E, E. These nozzles are arranged in pairs C C and C² C³
on opposite sides of the wheel B and each two being in line. The steam pipes D¹ D4
and D2 D3 are in each case connected together by valves F.F' so that either the

page_text: pipes D D may be supplied with steam from the steam pipe G or the pipes D² D*
according to the positions of the said valves F F¹. The water pipes E¹, È², E³, E
may be similarly connected up. The two sets of valves are preferably connected
together by suitable mechanism so that both sets are operated simultaneously.
Supposing steam to be supplied to the pipes D1 D³ and water to the pipe E E³
the injector nozzles C¹ C³ are in action and on the principle of the injector, live
steam from the boiler draws water from the water supply and the mixture of
steam and water acts by impact from the nozzles C C³ upon the vanes or buckets:b
of the wheel B causing it to rotate in the direction indicated. The mixture of
hot water and steam then passes away through the nozzles C² Cª which act for the
time being as outlets.
In order that the engine may work in a continuous cycle. the mixture of hot
water and steam as it passes away through the nozzle is caused to pass through
a cooling coil (not shown) for condensing the steam and then to the water supply
for the nozzle C where it forms either in conjunction with fresh water or not,
the water which is drawn in with the steam. Similarly the outflow through the
nozzle C is passed through a cooling coil and used in the nozzle C. It will thus
be seen that the water is used in a continuous cycle, the only additional supply
being taken as water leaks away and to supply other deficiences.
By reversing the connections the nozzles CC may be supplied with steam and
water and nozzles C¹ C³ will act as outlets. The wheel B will then revolve in the
opposite direction.
Relief valves H1 H2, are provided for relieving the pressure in the apparatus and
for allowing superfluous water and steam to escape.
The relief valves H1 H2 are connected with the passages h¹h and 3 and 4 and are
of such construction that any of the passages h¹ h h h may be open or closed.
When the engine is running in the direction indicated the relief valves H¹ H²
are open to the passages and when reversed the passages h² ht.
When starting the engine all the valves and cocks should be open to ensure that
all air is driven out of the pipes by the steam which is next admitted for that
purpose. As soon as this has been effected, the valves are closed to the
passages h² hh, the passage alone being open. When the water appears,
the passage is closed and the valve h is opened slightly. By this time, the
engine is moving, the steam and water acting through the nozzles CC3 and the
steam and water and the outlet valves can be adjusted (preferably
under full steam) after which the engine will continue running and
no further attention will be required. The passage may also be opened if
necessary by means of the relief valve H¹.
.
If the engine is reversed the passages h¹³ will be open as will be readily
understood.
To stop the engine, the steam valves should be closed and the outlets and other
passages closed sharply afterwards so that air is prevented as much as possible from
entering. If steam is up the engine can then be readily restarted. Separate
valves may be provided to all of the passages ¹² if desired.
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) An improved rotary engine in which the steam draws water through an
injector nozzle, and the jet of water and steam acts upon a vane or bucket wheel,
to cause it to rotate, the hot water and steam then passing through a condensing
coil and being used as the water supply to a second injector nozzle, so that a
continuous cycle is set up, substantially as described.
(2) An improved rotary engine comprising the wheel, B provided with vanes b
injector nozzles C1 C2 C3 C4 by which a jet of steam and water can be caused to
act upon the vanes to cause the wheel B to rotate, steam pipes D1 D2 D3 D' by
which steam is supplied to the nozzles C¹ C³ C³ C³, water supply pipe E¹²E³

page_text: by which water is supplied, valves F F¹ by which the steam can be directed to the
nozzles CC or C2C according to the direction of motion required the nozzles C² (
or CC³ then acting as outlets by which the hot water or steam passes away after
acting on the vanes b, cooling coils through which the hot water or steam passes
before being used again in a second injector nozzle SO that a con-
tinuous cycle is set up and relief valves H1 H2 by which any of the passages h¹²
can be opened or closed to facilitate the starting and working of the engine
substantially as described with reference to the drawings.
Dated this 25th day of August 1898.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.