Improvements in Combined Gas and Blowing Engines.
Year: 1899

page_text: Date of Application, 30th Jan., 1899
Complete Snanification Loft 24th Oct 1900 Accented
25th 1000
PROVISIONAL SPECIFICATION.
Improvements in Combined Gas and Blowing Engines.
We, BENJAMIN HOWARTH THWAITE, of 29, Great George Street, Westminster,
in the County of London, Civil Engineer, FRANK LACROIX GARDNER, of 32, Old
Jewry, in the City of London, Mining Engineer, and SAM HARTLEY, of 19, Marion
Street, Bingley, Yorks, Engineer, do hereby declare the nature of this invention
to be as follows:-
-
The waste gases of blast furnaces when suitably purified are sometimes utilised
for working gas motor engines. This invention relates to the combination of
such engines with blowing cylinders to provide blast for the furnace.
For this purpose, a twin gas motor engine having the cycles of its two cylinders
arranged so that in every revolution one of the pistons performs its working
stroke, has the cranks for the two pistons which coincide in their setting, or
a separate crank connected to the piston of a single acting blowing cylinder,
in such a way that the early part of the working stroke of the engine corres-
ponds with the latter part of the stroke of the blowing piston. Thus the gas
imotor piston which is performing its working stroke has the greatest pressure
acting on it when the resistance due to the greatest compression in the blowing
cylinder has to be overcome. In order that the blowing piston may work at
the speed of the gasmotor pistons, the suction and discharge valves for the air
are worked positively from the engine shaft, without the loss of time which
occurs when they have to open and close automatically.
According to a modified arrangement, adapted to cases where there is a con-
siderable supply of gas and a considerable volume of blast is required, we place
two horizontal gas engine cylinders in line one on each side of a common crank
to which both their pistons are connected, and we place vertically above the
crank shaft a pair of blowing cylinders, the one some distance above the other.
The piston rods of both the blowing cylinders are fixed to one cross-head which
works in guides in the space between the two cylinders and has its end linked
by connecting rods to a pair of cranks on the shaft of the gas engines.
Dated this 30th day of Lenue 1800
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Combined Gas and Blowing Engines.
We, BENJAMIN HOWARTH THWAITE, of 29, Great George Street, Westminster,
in the County of London, Civil Engineer, FRANK LACROIX GARDNER, of 32, Old
Jewry, in the City of London, Mining Engineer, and SAM HARTLEY, of 19, Marion
Street, Bingley, Yorks, Engineer, do hereby declare the nature of this invention
Price 8d.1

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement; -
The waste gases of blast furnaces when suitably purified are sometimes utilised
for working gas motor engines. This invention relates to the combination of
such engines with blowing cylinders to provide blast for the furnace, as we shall
describe referring to the accompanying drawings.
Fig. 1 is an elevation and Fig. 2 is a sectional plan on the line 2-2 of Fig. 1
of one arrangement of blowing engine according to our invention.
.......
Fig. 3 is a central vertical section, l'ig. 4 is an end view and Fig. 5 is a plan
of a modified arrangement.
1
Referring first to Figs. 1 and 2, we employ a twin gas engine of which a a
are the cylinders, their pistons being connected to cranks c c in line with each
other on a shaft b, having a fly wheel d. We set the valve gear of the two
cylinders, which work on the four stroke Otto cycle, so that in each revolution
one of the pistons performs its propelling stroke. In the middle of the shaft b
is another crank e set at about right angles to the cranks c and this crank is
connected to the piston of the blowing cylinder f which is mounted above on
columns g.
This cylinder is single acting, having suction and discharge valves arranged
in a casing h. These valves may be self-acting or they may be worked from the
shaft b in any suitable known manner.
In each revolution of the shaft, when the cranks e have moved about 45° from
the left hand dead centre, the propelling power of the piston then operating is
about its maximum. At the same time the crank c being about 45° from its
lowest dead centre, has then to effect the maximum compression of the air, that
is to say, to a pressure of about 4 or 5 lbs. per square inch, suitable for blast.
Thus, by the arrangement of the gas and air cylinders and their cranks, the
maximum of work that has to be performed in each revolution is met by the
maximum of power for performing it.
According to a modified arrangement shewn in Fig. 3, 4 and 5, adapted to cases
where there is a considerable supply of gas and a considerable volume of blast
is required, we place two horizontal gas engines each having a pair of cylinders a
in line one on each side of a common crank c to which both their pistons are
connected, and we place vertically above the crank shaft ba pair of blowing
cylinders f, the one some distance above the other. The piston rods of both the
blowing cylinders are fixed to one crosshead h which works in guides in the
space between the two blowing cylinders and has its ends linked by connecting
rodsk to the cranks of the gas engines.
Having thus particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that we claim
is:―
1. The combination of a horizontal twin gas motor engine and a vertical blow-
ing cylinder, worked from a crank at about right angles to the cranks on the
same flywheel shaft worked by the gas engine, substantially as and for the pur-
pose set forth.
2. The combination of a pair of horizontal twin gas motor engines and a pair
of vertical blowing cylinders having their pistons worked together from the
cranks of the gas motor engines, substantially as described.
Do thi
dave of Octahan 1QU0