An Improved Manufacture of End Connecting Boxes for Tubular Boilers.
Year: 1895

page_text: Date of Application, 14th Dec., 1895
Complete Specification Left, 14th Sept., 1896-Accepted, 21st Nov., 1896
PROVISIONAL SPECIFICATION.
An Improved Manufacture of End Connecting Boxes for Tubular
Boilers.
We CLAUD THORNTON CAYLEY, of Ivy Mount, Leigham Court Road,
Streatham, and REUBEN SAMUEL COURTMAN, of 19 Sibella Road, Clapham,
both in the County of Surrey, Engineers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improved manufacture of boxes for connecting the
ends of the water tubes in tubular boilers and more especially in the Belleville
and similar boilers.
Hitherto such boxes have been made of cast steel or cast malleable iron, but
boxes so constructed are often weakened by blow-holes.
According to our invention we obviate these disadvantages by making the boxes
of wrought steel, by stamping, forging or pressing. The improved box may be
made from a wrought steel plate or from a block.
In carrying our invention into practice, according to one method, a plate of the
required size and shape is "dished" by stamping, pressing or otherwise, the edges
of the plate being turned up all the way round at an angle to the remainder of the
plate. By continued stamping and pressing, the dished plate being held in a
suitable mould or die,-the sides of the plate are gradually drawn out to the
required length for forming the wall of the box. By suitable dies or otherwise
the top edge of the wall of the box is then turned over and inwards so as to form
the end of the box, while leaving the two usual sight holes or cleaning openings.
The joint, where the turned over sides of the box meet, between the sight holes is
welded, either electrically or otherwise.
In order to obviate the necessity of the welded joint between the sight holes,
the box is preferably made with one long sight hole of a suitable size and shape
instead of two. The openings in the other end of the box for the reception of the
boiler tubes are subsequently punched out or drilled.
If the box be made from a wrought steel block it is worked by driving punches
into it while it is held in a suitable die or mould which prevents lateral expansion
of the said block while permitting endwise flow or movement of the metal around
each punch as the latter is driven into the block. In this way a cavity of the
desired dimensions is gradually formed within the block and the block is at the
same time extended endwise so as to form a box of the required length.
The usual lugs, for assisting to hold the tubes in position, on the sides of
the boxes are also formed in the forging or stamping operations hereinbefore
described.
Dated thie 14th day of December 1895
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.

page_text: An Improved Manufacture of End Connecting Boxes for Tubular
Boilers.
We, CLAUD THORNTON CAYLEY, of Ivy Mount, Leigham Court Road,
Streatham, and REUBEN SAMUEL COURTMAN, of 19 Sibella Road, Clapham,
both in the County of Surrey, Engineers, 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 an improved manufacture of boxes for connecting
together in pairs the ends of the water tubes of tubular boilers and more especially
of "Belleville" and similar boilers.
Hitherto such boxes have been made of cast steel or cast malleable iron and
have been liable to be weakened by blow-holes which render them dangerous
in use.
According to our invention we obviate this defect by making the boxes of
wrought steel, or other suitable wrought or rolled metal or alloy, by stamping, or
pressing them from a plate or from a block of the metal or alloy.
The method whereby our invention is carried into practice for the manufacture
of wrought steel boxes for example consists in taking a plate or a block of wrought
steel heated to a proper temperature and treating it in a suitable mould or die by
stamping or pressing the same so as to form a dish and then gradually drawing
out the sides of the dish to the required depth for forming the wall of the box.
By suitable dies or otherwise the edge of the wall of the box is then turned over
or flanged inwards so as to form the front wall of the box in which wall are the
usual sight holes or cleaning openings.
Referring to the accompanying drawings which illustrate our improved
manufacture,
Figure 1 is a transverse section of a mould showing a block therein, and the
plunger for operating on the block.
Figure 2 is a transverse section of the cup produced by pressing or stamping
the block in the mould.
Figure 3 is a view similar to Figure 1 but showing a plate in position for being
treated in the mould to produce a product like that shown in Figure 2.
Figure 4 is a transverse section of the cup after the rim has been turned or
flanged inward to form a box.
Figure 5 is a plan of the box.
Figure 6 is a plan of a modified form of box hereinafter described.
Figure 7 is a plan, and
Figure 8 is a longitudinal section of the finished box having two sight or
hand holes.
Figure 9 is a longitudinal section, and
Figure 10 is a transverse section of a box produced by drawing the same in the
longitudinal direction and then closing the end.
Like letters of reference denote corresponding parts in the several figures.
A is the mould in which the block or plate is treated; B is the plunger or
punch for pressing or squeezing the block or plate; C Figure 1 is the block,
and D Figure 3 is the plate to be treated according to our invention; E Figure 2
is the cup produced by treating the block or plate as the case may be in the mould.
When we begin with a block of wrought steel C we heat it to the proper
temperature and place it in the mould as shown in Figure 1 and then by working
the plunger or punch B we stamp or press the block and bring it to the shape
shown in Figure 2.

page_text: The die or mould A prevents lateral expansion of the block while permittin
the flow or movement of the metal around the punch or plunger as the latter in
driven into the block. Several punches may be used successively beginning with
a small one and finishing with one having the dimensions of the interior of the-
finished box. In this way a cavity of the desired dimensions is gradually formed
within the block and the wall of the block is at the same time extended so as to
form a cup E of the required depth.
°
When we begin with a plate D as indicated in Figure 3 we first dish the plate
by pressing the same into the mould by a suitable plunger thus turning up the
edge of the plate and then by continued treatment with suitable plungers or
punches we work up the dish into the form shown in Figure 2 by the same method
as that above described for working up the block. When this treatment is complete.
we push the cup out of the mould by means of a block a.
The edge or rim of the cup E thus formed is then by suitable_dies or otherwise.
turned over or flanged inward as indicated at e in Figure 4. The opposite sides
of the inwardly turned flange e may be constructed to meet at the centre as.
indicated by the broken line in Figure 5 in which case two holes F, F are formed:
in the front wall of the box, or the said opposite sides of the flange may not meet
in which case one long opening F is formed in the front wall of the box as.
indicated in Figure 6. The openings F are covered by suitable doors or plates.
when the boiler is at work such doors or plates being removable for cleaning and
examination purposes. The inwardly turned flange forming the front wall of the
box indicated in Figure 5 may be welded between the holes F, F and separate
cover plates can then be used for the two holes. The welding may be done
electrically or otherwise. In the construction shown in Figure 6 the welded
joint
obviated, but in that case a long cover plate is necessitated to cover the
G, G Figures 7 and 8 are openings in the rear wall of the box for the reception.
of the boiler tubes. These holes are punched out or drilled subsequently to the
completion of the pressing or stamping operations.
long hole.
H, H are the ears or lugs usually provided at the sides of the boxes to form.
supports for the boxes. These lugs may be formed by the stamping or pressing
operations above described or they may be suitably welded on.
Instead of drawing up the box from the back to the front as above described
we sometimes draw it up end wise or from end to end and then close the end of the
box as indicated in Figures 9 and 10.
Having now particularly described and ascertained the nature of our said.
invention and in what manner the same is to be performed, we declare that
what we claim is :-
1. The method substantially as hereiu described of making a tube connecting
box from a plate or block of wrought steel or other suitable wrought or rolled
metal or alloy, for the purpose specified.
2. A wrought steel connecting box constructed substantially as described with.
reference to Figure 6 or to Figures 7 and 8, of the accompanying drawing, for the-
purpose specified.
Dated this 14th day of September 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants..
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants..