Improvements relating to the Construction of Water-chambers for Water Tube Boilers, and to Apparatus therefor.
Year: 1896

page_text: Date of Application, 4th June, 1896-Accepted, 5th Sept., 1896
[Communicated from abroad by RUDOLF MÜLLER, of 38 Sandakerveien,
Christiania, in the Kingdom of Norway.]
Improvements relating to the Construction of Water-chambers for
Water Tube Boilers, and to Apparatus therefor.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 relates to water chambers for water tube boilers and consists in a
new method and apparatus for the manufacturing of the same, whereby a greatly
improved product is obtained.
According to the present invention waterchambers are made from a single plate
bent in U-shape, and the edges of which are also bent so that the chamber may be
finished by welding. In this manner a great deal (about 60%) of the usual
welding work is saved, while at the same time a better product is obtained.
The accompanying drawings illustrate the improved method and the apparatus
used for bending the plates.
Figures 1 and 2 show the outlines of plates to be used for two different forms of
chambers.
Figures 3, 4 and 5 show respectively in side elevation, plan and front elevation
a machine by which the plates may be bent in a suitable manner, and
Figures 6, 7 and 8 show details of the same.
The machine preferably used for bending or rolling the plates consists of two
toothed segments C, that together with the driving gear B are journalled in a
suitable frame A, and which may be rotated independent of each other on pivot
pins E. The hubs of the wheels are given an elongated form and are provided
with a slot F, in which a roller H is adjustably mounted by means of screws G.
In a slot I in one of the spikes of the segments another roller J is mounted. On
the cross-beam of the frame is placed an anvil K. The latter may be fastened by
means of screws L, and when the nuts M are unscrewed the anvil may be
suspended on the screws by hoops N (as shown in Figure 5).
The plates after being cut to the required form (as shown in Figures 1 and 2)
and being heated in a long fire, are placed under the auvil in the machine, see
Figure 6, and then the toothed segnients are rotated until the rollers have the
position shown in dotted lines in Figure 6, and the bending of the curved part 1
(Figures 1 and 2) is then finished. For bending the side walls 2, the same
machine is used, but in this case three anvils O, P and R are used. Instead of
the semicircular anvil K the bottom anvil O is placed on the table of the machine.
P is the anvil around which the sides are bent and the whole is secured in the
machine by means of the anvil R and nuts M. The suspending hoop N' serves
in this case together with the links R' and P¹ to keep the middle anvil P and the
uppermost anvil R in the lifted position.
If the remaining top wall (3) were also bent over an anvil, it would be impossible
to get the latter out of the box. When this latter wall is to be bent the anvil
therefore is replaced with a number of flat iron strips, which are laid in and
secured by wedges before the rolling takes place. The plate is not pressed

page_text: completely onto the adjoining edge, but there is left an open space (see Figure 8)
large enough for the strips to be taken out one by one.
The machine described works very easily, while as soon as the segment is
rotated a little, its own weight assists in the further movement.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
1. As a new article of manufacture water chambers for water tube boilers made
out of a single piece of plate cut to the required form and bent and welded so as to
form a closed box of the desired shape, substantially as described.
2. In a machine for manufacturing water chambers for water tube boilers the
combination with a suitable frame or bed plate (A) and an anvil (K) or block
which may be secured thereupon of a pair of toothed segment wheels (C) in gear
with a driving mechanism and of a roller (H) adjustably mounted between the
said segment wheels at a short distance from its pivots.
3. A machine for manufacturing water chambers for water tube boilers sub-
stantially as described.
Dated this 4th day of June 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.