Improvements in Methods and Arrangements for the Conveyance of the Waste Products of Combustion and Steam from the Locomotives of Underground Railways.
Year: 1893

page_text: Date of Application, 24th Apr., 1893-Accepted, 2nd June, 1893
COMPLETE
SPECIFICATION.
Improvements in Methods and Arrangements for the Conveyance
of the Waste Products of Combustion and Steam from the
Locomotives of Underground Railways.
GEORGE DALTON of Regent Villas, Headingley, Leeds, in the County of York,
Mechanical Engineer, and GEORGE BRAY of Wood Lane Headingley, Leeds, in
the County of York Gas Lighting 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 :-
The object of our invention is to prevent the fouling or pollution of the atmo-
sphere of railway tunnels, by the waste gases and steam emitted from the locomotive
engines as ordinarily used.
Our invention consists of an improved method of applying the travelling box
valve or slide, which is mentioned in Specification No. 10851, 1888, by which
method a direct connection is made from the ordinary engine chimney to the said
box slide which is placed with its open side up, above the locomotive instead of
under the same as hitherto.
In performing its functions the box slide is made to travel in contact with the
under side of an overhead air conduit, in which valves are placed at suitable
distances, and are actuated by the said box slide all in a similar manner to those
mentioned in connection with air trunks in Specification No. 10851 1888 aforesaid.
The contact of the box slide and the overhead conduit is maintained by means of
springs which are connected with a joint piece, between the chimney and box slide,
at one end of the same; and at the other end of the same by springs which are by
preference mounted on the cab of the engine. The box slide may be taken out of
contact with the air conduit, and the suction which is maintained in the same,
prevented from taking effect on the boiler fire, by suitable arrangements of levers
or screws or the like.
Also our invention consists of the connecting piece of the chimney and the said
box slide, which piece is formed with a spherical or ball joint at the top, and a sleeve
having a packed stuffing box and gland, on the body of the chimney. The box
slide is carried by the curved surface of the said ball joint, and the whole arrange-
ment is kept in working position by the aforesaid springs which are applied to lift
the said sleeve.
Also our invention consists in fixing the valve fitted air conduits for the system
referred to in Specification No. 10851, 1888, in overhead position, as shewn in the
accompanying drawings, with the valves placed underneath the same, suitable for
combined action with the box slide aforesaid, and our invention includes the
method of carrying or suspending the said air conduits by the rolled metal bows as
shewn.
Also our invention includes the method as shewn of constructing the valve seats
in the said conduits by forming an internal rim on the thin plate bottom of the
same, and of the method of forming the tongued joint between the two parts of the
box slide end chambers lid or trap, which joint provides for the passage of
the striking piece of the air valve, over it, without shock or damage according to
Specification No. 4797, 1892.
The chief advantages possessed by our said improvements are, more economical
construction, greater efficiency of draught, greater railway safety, and greater
general railway convenience, than the arrangements hitherto used for attaining the
said objects by the system referred to in No. 10851, 1888.
For the particular explanation of our said invention we refer to the drawings on
Sheets 1, 2 and 3 in which
Fig. 1 Sheet 1 represents a longitudinal section of a locomotive fitted with a

page_text: travelling box slide (1), and connected to the chimney by the sleeve and ball joint
piece (2). The ball socket is shewn by (3), and fitted to the box slide. The box
slide end chambers are shewn by (4) (4'), and the lids or trap by (42) (43). The
bearing springs of the chimney sleeve are shewn by (5. 5. 5. 5.), whilst those of the
cab end of the box slide are shewn by (6. 6.). The air trunk is shewn by (7. 7. 7.),
and the suspension bows by (8. 8.). The air trunk joints at (71, 71,) are similar to
those referred to in Specification No. 16105, 1892. The internal rim valve seat in
the bottom plate of the air trunk is shewn by (9).
In Sheet 2 Fig. 1 is a cross section of a tunnel fitted according to the invention
and the same letters refer to the same parts as in Sheet 1.
Sheet 3 Figs. 1. 2. & 3 represent a vertical section, plan, and cross section, of
the box slide end chamber, with its lid or trap, the same letters referring to the
same parts as in Sheets 1 and 2, but the tongued joint of the lid or trap is
shewn by (10).
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
First. The overhead position, method of suspension, and form of valve seats of
the valve fitted air conduits, substantially as shewn and described.
Second. The method of connection between the engine chimney, and the box
slide, consisting of a sleeve carried on springs, and fitted with the spherical joint,
substantially as shewn and described.
Third. The form of joint of the lid or trap of the box slide end chambers,
substantially as shewn and described.
Fourth. The combined general arrangement of the overhead air trunk, the
inverted box slide and the method of carrying the same on the springs aforesaid.
Dated this 24th day of April 1893.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.