Improvements in Soldering or Brazing Hearths or Pans.
Year: 1896

page_text: Date of Application, 28th Dec., 1896
Complete Specification Loft 16th Cont 1007
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2
PROVISIONAL SPECIFICATION.
Improvements in Soldering or Brazing Hearths or Pans.
We ELKINGTON & CO. LIMITED, of Newhall Street, Birmingham, in the County
of Warwick, Silversmiths and Electro Platers, and HENиY THOMAS FELLOWS, of
Shirley Road, Acock's Green, in. the County of Worcester Manager of Works, do
hereby declare the nature of this Invention to be as follows:-
The said invention consists of the improvements hereinafter described in solder-
ing or brazing hearths or pans of the kind described, represented and claimed
in the complete specification of our application for Letters Patent No. 4921
year 1896, the said improvements having for their principal objects to simplify
the construction of the said hearths or pans and to increase their efficiency as
well as to obtain a more uniform distribution of the bottom blast by which the
combustion of the coke or charcoal in the rotary pan is maintained than is effected
in the arrangements described in the specification referred to.
In applying our present improvements to a circular undivided pan, we fix
at a short distance above the bottom of the said pan perforated plate or
diaphragm constituting a false bottom to the said pan, the perforations in the
said false bottom being countersunk or tapered from the underside; that is to
say, while the said perforations are of a large size at bottom they are small at
top. By making the perforations in the way described the choking of the said
perforations by the dust and ash in the pan is prevented.
The space between the false bottom and the true bottom of the pan constitutes
an air chamber into which the blast is introduced by the axial pipe on which the
pan is supported and rotates.
The ignited coke or charcoal rests on the perforated false bottom the air enter-
ing the ignited coke or charcoal through the perforations in the said false bottom in
a series of fine jets and thereby maintaining the combustion of the said coke or
cliarcoal.
In applying the said improvements to one arrangement of a divided pan or
hearth, we divide the air space or chamber by radial fins or webs into four or
other number of compartments, each compartment forming a separate air chamber.
We supply air to the several compartments by a four way nozzle, where four
compartments are employed, terminating the top of the axial supporting pipe of
the pan.
Or the axial supporting pipe instead of being connected directly with the pan
may terminate in four or other number of radial arms or branch pipes, vertical
pipes from the ends of which enter the series of chambers at or about their middle.
In the last described arrangement each of the branch supply pipes may be pro-
vided with a stopcock by which the supply of air may be regulated or cut off.
Where the said hearths or pan are to be employed in the soldering or brazing
of the tubes of cycle frames in their lugs we prefer to make the hearths or pans
of an oblong figure in plan and to employ two pans joined together end to end,
the blast being conveyed to the air chambers or spaces of the said pans by vertical
1.

page_text: pipes passing from the ends of diverging or radial branch pipes carried by the
axial pipe of the apparatus. Each branch pipe is preferably provided with a
stopcock.
7
Or four or other number of oblong pans may be combined together, the said
pans when four are employed having a figure in plan resembling a cross.
We wish it to be understood that we do not limit ourselves to the shapes
described of the single or compound brazing hearths or pans as these may be
varied without departing from the nature of the said invention.
We further wish it to be understood that the process of soldering or brazing is
conducted on the rotary hearths or pans hereinbefore described in the ordinary
way, that is, by the use of a gas blow pipe the rotary pans or hearths hereinbefore
described having for their objects the preliminary heating of the parts of the
articles to be soldered or brazed and facilitating the soldering and brazing process
generally.
Dated this Twenty-eighth day of December 1896.
W. T. WHITEMAN,
Agent for the Applicants:
Improvements in Soldering or Brazing Hearths or Pans.
We ELKINGTON & Co. LIMITED, of Newhall Street, Birmingham, in the County
of Warwick, Silversmiths and Electra Platers, and HENRY THOMAS FELLOWS, of
Shirley Road, Acock's Green, in the County of Worcester, Manager of Works, do
hereby declare the nature of the said invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the
following statement:-
The said invention consists of the improvements hereinafter described in solder-
ing or brazing hearths or pans of the kind described, represented and claimed
in the complete specification of Letters Patent granted to us No. 4921 year 1896,
the said improvements having for their principal objects to simplify the con-
struction of the said hearths or pans and to increase their efficiency as well as
to obtain a more uniform distribution of the bottom blast by which the com-
bustion of the coke or charcoal in the rotary pan is maintained than is effected
in the arrangements described in the specification referred to.
In applying our present improvements to a circular undivided pan, wb fix
at a short distance above the bottom of the said pan a perforated plate or
diaphragm constituting a false bottom to the said pan, the perforations in the
said false bottom being countersunk or tapered from the underside; that is to
say, while the said perforations are of a large size at bottom they are small at
top. By making the perforations in the way described the choking of the said
perforations by the dust and ash in the pan is prevented.
The space between the false bottom and the true bottom of the pan constitutes
an air chamber into which the blast is introduced by the axial pipe on which the
pan is supported and rotates.
The ignited coke or charcoal rests on the perforated false bottom the air enter-
ing the ignited coke or charcoal through the perforations in the said false bottom in
a series of fine jets and thereby maintaining the combustion of the said coke or
charcoal.
In applying the said improvements to one arrangement of a divided pan or
hearth we divide the air space or chamber by radial fins or webs into four or
other number of compartments, each compartment forming a separate air chamber.
We supply air to the several compartments by a four way nozzle, where four

page_text: compartments are employed, terminating the top of the axial supporting pipe of
the pan.
Or the axial supporting pipe instead of being connected directly with the pan
may terminate in four or other number of radial arms or branch pipes, vertical
pipes from the ends of which enter the series of chambers at or about their middle,
In the last described arrangement each of the branch supply pipes may be pro-
vided with a stopcock by which the supply of air may he regulated or cut off.
Where the said hearth or pans are to be employed in the soldering or brazing
of the tubes of cycle frames in their lugs we prefer to make the hearths or pans
of an oblong figure in plan and to employ two pans joined together end to. end;
the blast being conveyed to the air chambers or spaces of the said pans by vertical
pipes passing from the ends of diverging or radial branch pipes carried by the
axial pipe of the apparatus. Each branch pipe is preferably provided with a
stopcock.
Or four or other number of oblong pans may be combined together, the said
pans wlien four are employed having a figure in plan resembling a cross.
Figure 1 of the accompanying Drawings represents in elevation, partly in
section à bottom blast circular undivided rotating soldering or brazing hearth con-
taining the said improvements and Figure 2 represents in section and Figure 3
in plan, the pan or hearth proper detached.
The same letters of reference indicate the same parts in Figures 1, 2 and 3.
a is the circular pan of the hearth to the underside of which pan the axial
pipe on which the pan a is supported and rotates is bolted by the flange c.
The arrangement of parts by which the axial pipe b is made capable of rotating
on its supporting stand is the same as that described and represented in the
specification of the patent before referred to; d is the perforated plate or diaphragm
constituting a false bottom to the pan the said false bottom being supported by
the flange on its underside resting on the true bottom of the pan as represented
in Figure 2. The flange d besides supporting the perforated false bottom also
serves to prevent wholly or mainly the passage of the blast betweon the edge of
the false bottom and the sides of the pan. It will be seen that the perforations
in the false bottom d are countersunk or tapered from the underside for the
purpose of preventing the choking of the said perforations by dust and ash. The
space between the false bottom d'and the true bottom of the pan constitutes an
air chamber e into which the blast is introduced at f by the axial supporting
pipe 6. The blast from a blower or fan is introduced into the support of the
axial pipe bat g and is delivered into the air chamber e, the blast being controlled
by the stop-cock h. The ignited coke or charcoal rests on the perforated false
bottom of the pan, the air entering the ignited coke or charcoal through the
perforations in the said false bottom in a series of fine jets. A very uniform
distribution of the 'blast through the whole of the ignited coke or charcoal on
the false bottom and the efficient maintenance of the combustion of the said coke
or charcoal is thereby obtained.
PT
Figure 4 represents in vertical section and Figure 5 in plan a circular divided
rotating pan or hearth containing the said improvements the stand or base part
of the hearth being omitted. The section Figure 4 is taken on the line i, 1
Figure 5. In this arrangement the lower part of the pan or hearth a is divided
by radial fins or webs i (see Figure 5) into four compartments and into each com-
partment a sector shaped perforated plate or diaphragm or false bottom k is
dropped, each of the said perforated plates or false bottoms being provided with
a supporting flange as before described. By the fitting of the perforated plates k
into the compartments formed by the radial fins or webs i four separate air
chambers are formed in the hearth the said chambers being marked respec-
tively l, m, n, p. The blast passes from the axial supporting pipe to the
several air chambers of the hearth by the four way nozzle q. Or branch pipes r
indicated in dotted lines, may terminate the axial supporting pipe beach branch
pipe entering its chamber at about the middle (see the plan Figure 5). Each

page_text: of the branch pipes is provided with a stop-cock by which the supply of air
is regulated or cut off so that each division or compartment of the hearth is
made independent of the others. Instead of supporting the sector like perforated
false bottoms by flanges on their undersides they may be supported by shoulders
or ledges on opposite sides of the radial webs or divisions i, i; we prefer however
the arrangement shown in the Drawing.
Figure 6 represents in longitudinal section; Figure 7 in cross section and
Figure 8 in plan a rotating divided pan or hearth having an oblong form con-
taining the said improvements. The cross section Figure 7 is taken on the dotted
line y, y Figure 8. This hearth consists of two oblong pans joined together end
to end at u and each is provided with a perforated false bottom or diaphragm .
.Blast is conveyed to the air chambers of the divided hearth by the vertical
pipes z on the horizontal branch pipes carried by the axial supporting pipe b
of the hearth.
Four or other number of the oblong pans Figures 6, 7, and 8 may be joined
together each air chamber of the compound hearth being supplied with an
independent blast pipe.
When four of the said oblong pans are joined together the hearth has a figure
in plan resembling a cross:
We wish it to be understood that we do not limit ourselves to the shapes
described of the single or compound brazing hearths or pans as these may be
varied without departing from the nature of the said invention.
We further wish it to be understood that the process of soldering or brazing
is conducted on the rotary hearths or pans hereinbefore described in the ordinary
way that is, by the use of a gas blow pipe, the rotary pans or hearths hereinbefore
described having for their objects the preliminary heating of the parts of the
articles to be soldered or brazed and facilitating the soldering and brazing process
generally.
Having now particularly described' and' ascertained the nature of the said' inven-
tion and in what manner the same is to be performed we declare that we
claim as the said invention of "Improvements in soldering or brazing .hearths
or pans."
The combination with or adaptation to the undivided or divided pans. of rotary
soldering or brazing hearths having a bottom blast, of a false perforated bottom
or diaphragm on which the ignited coke or charcoal rests, thereby forming
between the said perforated bottom or diaphragm and the true bottom of the
pan an air chamber or series of air chambers into which the blast is delivered,
the blast from the said air chamber or air chambers entering the ignited coke
or charcoal through the perforations of the said false bottom or bottoms in a series
of fine jets for the purpose and substantially as hereinbefore described and illus-
trated in the accompanying Drawings.
Dated this Fifteenth day of September 1897.
ELKINGTON & Co., LIMITED.
Frederick Elkington,
H. G. Elkington,
} Directors.
Robert Smith, Secretary.
HENRY THOMAS FELLOWS.