Improvements in Steam Engines.
Year: 1892

page_text: Date of Application, 7th Apr., 1892
Complete Specification Left, 4th Feb., 1893—Accepted, 7th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Engines.
I, WILLIAM BRUCE THOMPSON, of Ellangowan, Dundee, in the County of
Forfar, N.B. Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its objects to improve the construction and action of triple
and quadruple expansion steam engines.
In carrying out my invention according to one modification, as applied to triple
expansion engines, I place the three cylinders side by side, and transmit the power
to the crank shaft by means of beams, a separate beam being used for each cylinder,
thus allowing a three throw crank to be employed. The engine is preferably self
contained, that is to say the crank shaft, entablature for the beams, and the
cylinders are all fixed to a common sole plate. The whole is so designed and
arranged as to give the maximum strength and stiffness. In case the engine
foundations should settle at any time, and thus throw the crank shaft out of line, I
may employ a flexible coupling between the said crank shaft and its continuation.
It is obvious that a somewhat similar modification may be employed in connection
with quadruple expansion engines.
Dated thig 5th day of Anvil 1909
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Engines.
I, WILLIAM BRUCE THOMPSON, of Ellangowan, Dundee, in the County of
Forfar, N.B. 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 :-
This invention has for its objects to improve the construction and action of triple
and quadruple expansion steam engines.
And in order that my said invention may be properly understood, I now proceed
more particularly to set forth the system, mode, or manner in or under which the
Bame is, or may be used, or practically carried into effect, reference being made to
the accompanying drawings, and to the letters and figures marked thereon, that is
to say:
Figure 1. is a side elevation of a triple expansion steam engine, looking on A.
(Figure 2.) showing the valve gear applied at the sides of the cylinders.
Figure 2. is a back elevation of same, looking on B. (Figure 1.).
Figure 3. is a back elevation of a similar engine, showing the valve gear applied
at the backs of the cylinders.
Figures 4. and 5. respectively illustrate a side and an end view of the flexible
coupling.
In carrying out my invention according to one modification, as applied to triple
expansion steam engines, and illustrated by Figures 1. and 2, I place the three
cylinders 6. side by side, and transmit the power to the crank shaft 7. by means of
beams 8, a separate beam being used for each cylinder; thus allowing a three
throw crank to be employed. The engine is preferably self-contained, that is to
say the crank shaft 7, entablature for the beams 9. and the cylinders 6. are all fixed
to a common sole plate 10. The whole is so designed and arranged as to give the
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maximum strength and stiffness. The valve gear 11, for each cylinder is actuated
by individual eccentrics 12, on the crank shaft 7.
In another modification, as illustrated by Figure 3, the valve gear 11. is situated
at the backs of the cylinders, the gear for each cylinder being actuated by
individual eccentrics 13. on a shaft 14. rotated by the crank shaft 7. by means of
bevel wheels 15. and 16. and shaft 17, or their equivalent.
In other modifications, four cylinders may be employed for quadruple expansion
steam engines, arranged in a similar manner to those for triple expansion engines,
as hereinbefore described.
In case the engine foundations should settle at any time, and thus throw the
crank shaft out of line; I may employ a flexible coupling, as illustrated by
Figures 4. and 5. between the said crank shaft 7. and its continuation, in which 7.
is, or may be the crank shaft and 18. its continuation. 19. are arms or levers
keyed or otherwise fixed to or part of the shafts, each carrying two pins 20. coupled
singly by means of the link 21. as shewn, or in pairs if need be, the journals of such
link or links being partly spherical, in order to form ball and socket joints.
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 :-
:-
(In triple and quadruple expansion steam engines, the construction and
arrangement of parts, as herein before described with reference to Figures 1. and 2.
of the accompanying drawings.
(2) In triple and quadruple expansion steam engines, the construction and
arrangement of parts, as herein before described with reference to Figure 3. of the
accompanying drawings.
(3) In beam engines, the construction and arrangement of crank shaft,
entablature for the beams, cylinders and soleplate as illustrated and described.
(4) In triple and quadruple expansion steam engines of the type hereinbefore
described, the arrangement of valve gear, with reference to Figures 1. and 2. of the
accompanying drawings.
() In triple and quadruple expansion steam engines of the type hereinbefore
described, the arrangement of valve gear, with reference to Figure 3. of the
of the accompanying drawings.
(6) In connection with steam engines and shafting, the flexible coupling as
hereinbefore described with reference to Figures 4. and 5. of the accompanying
drawings.
Dated this 3rd day of February 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.