Improvements in or relating to Hearths for the Brazing of Band Saws and the like.
Year: 1897

page_text: Date of Application, 14th Sept., 1897
Complete Specification Left, 23rd May, 1898-Accepted, 20th Aug., 1898
Improvements in or relating to Hearths for the Brazing of Band
Saws and the like.
I, WILLIAM JAMES BINGHAM, of Clough Works, Sheffield, in the County of
York, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved hearth for brazing band saws and the like
and has for its object the obtaining of a more consistent and uniform heat.
In hearths as at present constructed for this purpose, there is only one delivery
pipe from the bellows; which when in operation causes heat to be obtained only
on one side, making it difficult to braze."
In my improved hearth I arrange two or more pipes to deliver air or gas from the
bellows into the pan either at opposite sides or otherwise as desired, such an
arrangement enabling a uniform blast and heat to be obtained round the article
to be operated on.
On the present hearth the recess that is used for holding the fuel is generally
placed central to the hearth but in my hearth I arrange that this recess shall be
placed in any suitable position, so that the delivery pipes can be brought into
direct action with one another without being obstructed by the recess.
The delivery pipes are arranged that they preferably deliver underneath into
the pan, in a suitable position, and may be provided with suitable valves, taps,
or the like so that they may be used together or independently.
I
I use the ordinary gates and pans that are usually adopted for the purpose, but
may make suitable alterations in this respect, as found convenient.
Dated this 14th day of September 1897
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Hearths for the Brazing of Band
Saws and the like.
I, WILLIAM JAMES BINGHAM, of Clough Works, Sheffield, in the County of
York, Manufacturer, 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 hearth originally designed for brazing
band-saws and the like but found in practice to be applicable also to the general
'מ

page_text: .
WUIA U1 a sucu anu as T 105 object the tang of a consistent and norm
heating effect.
In the accompanying drawing
Figure 1 is a plan of my improved hearth.
Figure 2 is an elevation of the same.
Like letters indicate like parts throughout the drawings..
In constructing my improved hearth the ordinary bellows A are supported in
the usual manner on the legs B by their trunnions or pins B¹ the legs B being pre-
ferably flattened at their bases to form their feet B.
On the top of the legs B I fix or fasten a hearth C preferably having a recess or
well C therein for holding coke, cinders or fuel as a reserve.
I also provide another recess or receiver D of any desired shape or size receiving
two or more blast delivery pipes E and E' fixed or fastened thereto by any suitable
means and having their other ends socketed or flanged as at E2 and E³ on to the
bellows A. I preferably fix taps F F¹ valves or the like in any suitable position
in the connections E E E¹ and E³.
At the bottom of the legs B I adopt the usual rim G which is fastened or bolted
to the legs B acting as a stay therefor. The usual rocking shaft H is adopted,
with pedal H and arms H2 connected to rods H and H in the usual manner for
the purpose of operating the bellows.
It will be understood that the fuel is placed on the hearth C in the recess D and
by the operation of the bellows A the blast is delivered through the pipes E and E¹
to the recess I) in the hearth C coming in contact with the lighted fuel and operat-
ing thereupon with a constant and uniform blast and so causing a constant and
uniform heat to be generated throughout its mass and uniformly applied to the
article operated upon.
In ordinary, hearths only one blast pipe is used which tends to give a greater
heat on the blast side of the article treated than on the other and consequently
the work cannot be heated uniformly. With the improved arrangement thus
described this is obviated. I may use any suitable number of delivery pipes as E
and E¹ delivering from one bellows and through valves and taps such as F and Fi
so that any one pipe can be brought into operation or shut off at will.
I do not confine the application of this invention to the portable hearth or
bellows as it can be adapted to fixed hearths and also to fan or other blasts where
two or more delivery pipes are used for conducting the blasts into any desired
position in the pan or recess D also stay brackets K may be used for holding the
article to be operated on in position.
Having now particularly described and ascertained the nature of this said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. In smith's hearths and the like the combination of a fire-pan or recessed
portion such as D and two or more blast delivery-pipes such as E E¹ for the pur-
pose described. .
2. In smith's hearths and the like delivering two or more jets of air into the fuel
to render it uniformly incandescent throughout its mass.
3. The combination and arrangement of parts constituting the complete smith's
hearth substantially as described and illustrated in the accompanying drawings.
Dated this 23rd day of May 1898.
WILLIAM JAMES BINGHAM.
Boult & Wade,
Agents for the Applicant.