IMPROVEMENTS IN COMPOUND LOCOMOTIVES.
Year: 1884

page_text: "
I, ALFRED JAMES BICKMORE of Walter Alfred Barlow's Patent Agency,
6 St Pauls Churchyard in the City of London, do hereby declare the nature of the
said invention for "IMPROVEMENTS IN COMPOUND LOCOMOTIVES .a communi-
cation to me from abroad by August von Borries of Hanover in the Kingdom of
Prussia, to be as follows:-
This invention relates to improvements in compound locomotives, and consists in
the interposition of a valve between the receiver, and the large cylinder of com-
pound locomotives, by which arrangement the slide box, of the cylinder will be
shut in the direction of the receiver, and the hereinafter described special working
of the machine will be obtained or secured.
The construction and arrangement of the valve is as follows.
A union pipe, is in communication with the receiver, and a second union pipe is
in communication with the slide box, of the large cylinder, and the narrow opening
or port in the regulator body is in communication with the chief inlet pipe Before
the starting of the engine an intermediate valve or disc valve or clack valve
mounted between the first and second union pipes is closed, and thereby the
regulator is opened whereupon the steam enters not only into the small cylinder
but also into the large one, but the steam also enters into this latter through the
narrow opening communicating with the chief inlet pipe, with a tension which is
diminished in accordance to the larger area of the piston of the large cylinder.
The intermediate valve remaining as previously, closed by the tension in the space
of the lower union pipe, and the entrance of the steam into the receiver or first
union pipe being consequently intercepted, the latter rests in the first place void
and the small cylinder receives no back pressure. The starting takes place there-
fore with the entire power of the two pistons, quite in the same manner as in the
ordinary locomotives with separated cylinders.
As in consequence of the motion caused by the escape of the steam out of the
small cylinder into the receiver, the steam pressure in the latter has become a little
stronger than that in the slide box of the large cylinder, the intermediate valve,
D...5ll

page_text: opens automatically, and at the same time comes in contact with the regulator so
stopping the direct admission of the steam through the small opening in the
regulator body, so that the locomotive continues working as a compound engine.
In this open position, the valve is retained by the steam pressure acting out-
wards. By interposing the above described valve an engine will therefore be
obtained which begins working with separated steam pistons but continues working
as a compound engine.
WALTER A. BARLOW,
6, St. Paul's Churchyard, E.C. 10
COMPLETE SPECIFICATION.
Improvements in Compound Locomotives.
"
I ALFRED JAMES BICKMORE of Walter A. Barlow's Patent Agency 6 St Pauls
Churchyard in the city of London do hereby declare the nature of the said
invention for "IMPROVEMENTS IN COMPOUND LOCOMOTIVES a communication to
me from abroad by August von Borries of Hanover in the Kingdom of Prussia"
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This invention relates to improvements in compound locomotives and consists in
the interposition of a valve between the receiver and the large cylinder of com-
pound locomotives, by which arrangement the slide box of the cylinder will be
shut in the direction of the receiver and the hereinafter described special working
of the machine will be obtained or secured.
The construction and arrangement of the valve is illustrated in Figs. 1, 2 and 3
of the accompanying sheet of drawings and may be modified if required according
to the circumstances.
The union pipe a is in communication with the receiver, the pipe b with the
slide-box of the large cylinder and the passage or port e in the regulator body is in
communication with the chief inlet-pipe. Before the starting of the engine an
intermediate or disc valve c Figs. 1 and 2 or clack valve k Fig. 3 is closed and
thereby the port e is opened whereupon the steam enters not only into the small
cylinder, but also into the large one." The steam entering into the large cylinder
through the passage e communicating with the chief inlet pipe, is of diminished
tension in accordance to the larger area of the piston of the large cylinder. The
intermediate valve c remaining as previously closed by the tension in the space
of the lower union pipe and the entrance of the steam into the receiver or first
union pipe a being consequently intercepted, the latter rests in the first place void
and the small cylinder receives no back pressure. The starting takes place there-
fore with the entire power of the two pistons, quite in the same manner as in the
ordinary locomotives with separated cylinders.
b

page_text: As in consequence of the motion caused by the escape of the steam out of the
small cylinder into the receiver a the steam pressure in the latter has become a
little stronger than that in the slide box 6 of the large cylinder, the intermediate
valve c opens automatically and at the same time stopping by means of the cone d
the direct admission of the steam through the opening e so that the locomotive
continues working as a compound engine.
In this open position (see fig. 2) the valve is retained by the steam pressure
acting outwards upon the rod g. By interposing the above described valve an
engine will be obtained which begins working with separated steam pistons, but
continues working as a compound engine.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
Firstly. The interposition in compound locomotives of a stop valve (c or k)
between the large cylinder and the receiver, by which arrangement on the starting
of the locomotive the entrance of the steam from the slide box of the large cylinder
into the receiver is stopped, so that the small piston receives no back pressure.
Secondly. The combination of the valve (c or k) with a second valve d in such
way that by opening the first the second will be closed and thus the direct
admission of the steam to the large cylinder be stopped the same constructed and
operating as and for the purpose herein set forth.