Improvements, in. Trunks or Pipes for the, Conveyance of. Waste. Products of' Combustion and Steam from the Locomotives of Underground Railways.
Year: 1892

page_text: Date of Application, 8th Sept., 1892-Accepted; 15th Oct., 1892
-TR
COMPLETE SPECIFICATION.
4717
Improvements, in. Trunks or Pipes for the, Conveyance of. 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 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 :-
Our invention relates to the material employed in the manufacture of exhaust.
trunks or pipes for conveying the products of combustion and exhaust steam
separately or combinedly from the locomotives of underground railways; also to
the methods of construction, jointing and mounting of the said trunks or pipes;
and our invention is especially applicable to the method and means of exhaustion
described in Specifications No. 10851 dated July 26th 1888 of A. Anderson and
No. 4797 dated March 11th 1892 of George Dalton and George Bray. Hitherto
cast iron trunks or pipes only, have been used for the purpose named and these
having been found heavy and costly to manipulate and expensive to produce, it is
desirable to have cheaper and lighter methods and material, and our invention
consists in part of making the said trunks or conduit pipes of sheet steel or other
sheet metal whereby lightness in handling and lower cost is secured.
Also our invention consists of making the sides of the said trunks with pressed
flanges formed out of the same sheet as the web or body of the trunk sides; and
the joints of the ends of the trunks of the form of a double groove and tongue at
the top and bottom and a cross lapped or covered joint at the sides, all with
sufficient clearance and elasticity to form an efficient expansion joint to compensate,
for the varying lengths of the trunks due to varying temperature. The said end
joints of the trunks are secured by side bolts passing through lugs rivetted onto
the sides of the trunks at a position by preference of about half the depth of the
trunk and in such a manner that wooden or other wedges driven down between the
body of the said bolts and the trunk side joints, engage with, and press onto suitable
metal plates over and onto the sido laps of the india rubber or other packing strips
which form the tongues of the top and bottom joints. Sufficient elasticity of the
side bolt fastening of the joint is secured by placing an elastic or spring washer
under the head or nut of the bolt and next its bearing on the lugs aforesaid. The
ends of the packing strips which form the tongues of the top and bottom joints are
of sufficient length to pass completely down and up the trunk sides and are so laid
diagonally in jointing that they pass each other covering respectively half each of
the side joints, the ends passing out of suitable notches in the side plates, which'
are provided for the purpose of pressing upon and covering the packing strips on
the side joints. The grooves of the top and bottom joints are formed by the top
and bottom trunk plates and Z irons rivetted onto them inside the trunks and com-
pletely across the top and bottom plates. The top and bottom plates are rivetted
to the side plates or otherwise sufficiently well secured. The air valves are, seated'
under the top plates and are mounted on springs which are rivetted or bolted also
under the top plates. The striking piece of the air valve by which it is opened in
action is formed of a large nut which also secures the valve plate to the mounting
spring.
The bolt is keyed into the spring to prevent turning and the nut striking piece
secured from turning off accidently by a split pin passing through both nut and
bolt.
And further our invention consists of an improved chair for the support of the
joint ends of the air trunks, the said chair being formed of a single plate of

page_text: metal bent over at the ends so as to embrace and tighten onto the lower flanges
of the trunk sides; the chair being secured to the sleeper of the railroad by a
spike or fang bolt which passes through both the bent end and bottom plate of the
chair, thus securing and tightening the chair to the trunk flauge and also both to
the sleeper.
For the purpose of making the foregoing description more clear thie accompany-
ing sheets of drawings are provided in which the letters and figures refer to the
same parts in the different views.
Figures 1, 2 and 3 (Sheet 1) are a side elevation plan and end elevation of a
valve length of trunk. The top plate of the trunk is marked by (a) the bottom
plate is shown by (b) and the sides of the trunk by (c. c.). The flanges of the sides
are shown by (cc). The top and bottom joints are shown at (d) the Z irons
being (d) (2). The packing strip is (³) on Figure 4. which is a full size view of
the top and bottom joints. The side bolt of the trunk ends is shown by (e) and
the lugs which are connected by it by (f). The wooden wedges are shown by (g)
and metal shields for the same by (g) Figure 6 Sheet 2. The side plates onto
which the wedges bear are marked (h) the packing strips (3) being next the trunk
sides and under the side plates. The spring washers are shown by (E¹). The
diagonal positions of the packing strips on the side joints are shown by (d). The
Figures 1, 2 and 3 (Sheet 1) show a valve length of air trunk, the valve being (i)
and the valve spring (¹). The nut striking piece of the air valve is (). The
chair for supporting the trunk ends is shown at () with the bent ends at (¹) and
the fastening bolt or spike (2).
Sheet 2 shows isometrical views of a trunk end Figure 1., a pair of trunk ends
brought together for jointing Figure 2, a pair of trunk ends showing the cross
lapped joint of the packing strip Figure 3., a complete trunk joint Figure 4., a
detail view of the cover plate of the side joint Figure 5., the wooden wedge and
one of the metal shields for the same Figure 6. All the letters and figures refer
to the same parts as in (Sheet 1).
Having now fully shown and described the nature of our said invention we wish
it to be distinctly understood that what we claim as novel and secured to us by the
hereinbefore in part recited Letters Patent are:-
First. Making the said trunks of sheet or plate metal.
Second. Making the said trunk sides of pressed plate or angle flanged plate,
and fixed to the top and bottom by rivetting, bolting, or welding, producing tubes
of rectangular or other convenient section, substantially as shown and described.
Third. The double groove and tongue joint at the top and bottom of the trunk
and the cross lapped covered joint at the sides of the same and of forming the top
and bottom joint grooves by rivetting, bolting, or welding strips of metal of Z or
other suitable section to the top and bottom plates of the trunk substantially as
shown and described.
Fourth. Making the joint between the trunk ends by inserting in the grooves
aforesaid strips of india rubber or other packing and covering the side joints by
passing the said strip ends diagonally down and up the sides of the trunk ends,
under joint plates and secured by the lugs bolts and wedges as shown and
described.
Fifth. Making the supporting chair of a single plate of metal, bent over at the
ends or with a piece rivetted on, in such a manner that one bolt or fastening will
secure both the chair to the sleeper and to the trunk flanges substantially as shown
and described.
Sixth. The combination of all or any of the before mentioned details as shown
and described.
Dated this 8th day of Sentember 1809
JOHN HANDSLEY DALES,
Agent for the Applicants.