Improvements in Portable Forges.
Year: 1889

page_text: Date of Application, 7th Oct., 1889-Accepted, 9th Nov., 1889
COMPLETE SPECIFICATION.
Improvements in Portable Forges.
I, THOMAS HIRST THWAITES, of the firm of Thwaites Brothers Limited, Vulcan Iron
Works, Bradford in the County of York, 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 :-
My invention relates to improvements in that form of portable forge in which the
air blast is generated by means of a rotary blower and consists principally in the
application of frictional combined with toothed gearing, whereby the blower can be
driven at the required speed, and the use of endless chains, belts, or bands is obviated.
At the same time the various parts are rendered easily accessible for cleaning or
repairs.
In order to enable this invention to be fully understood I will proceed to describe
the same with reference to the accompanying drawings in which,
Figure 1 represents a side elevation..
Figure 2 a back elevation and Figure 3 a plan of a portable forge of my improved
construction.
Similar letters refer to similar parts in all the drawings.
The pan of the forge is represented at A and the back plate at B. The legs which
are preferably formed of angle iron, are represented at CC, and about midway
between the top and bottom of the legs are fixed the cross bars D upon which is
supported the rotary blower E. The outlet of the blower is connected to and conveys
the blast to the tuyere O by means of the pipe F, which pipe is provided with slides R
and Q, the latter of which opens in a direct line with the hole of the tuyere thereby
enabling a rod to be passed through for the purpose of removing cinders or other
obstructions.
To rotate the pistons or revolvers of the blower one of the piston shafts has keyed
upon it, the pinion N, which is driven by the spur wheel M. This spur wheel is
mounted upon one end of the shaft G, in brackets H, bolted to the legs C, at the
back of the forge. At the other end of the shaft G and driving it, is the friction
pulley K which is actuated by means of the friction wheel J. This friction wheel
driven by hand is carried by a bracket L bolted to the back plate B and by slackening
a nut the bracket can be adjusted to give the friction wheel more or less friction upon
the driven pulley as required.
The spur wheel and pinion M and N respectively are covered with a sheet metal
guard S to protect them from dirt or ashes, and a similar guard P is provided for the
gearing by means of which the two shafts of the blower pistons are connected.
It will be obvious that the frictional gearing may be made to change places with
the spur wheel and pinion, so that the frictional gearing is driven by the spur gearing
instead of driving it in the manner represented, with similar results.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is,
1. For the purpose of driving the rotary blower of a portable forge, frictional
gearing combined with and actuating a spur wheel and pinion substantially in the
manner described and represented in the accompanying drawings.
2. The employment of frictional gearing actuated by means of a spur wheel and
pinion for the purpose of driving the pistons or revolvers of a rotary blower attached
to a portable forge in the manner described.

page_text: 3. In portable forges the construction and arrangement of the various parts substan-
tially in the manner set forth and as represented in the accompanying drawings.
Dated this Third day of October 1889.
WILLIAM JAMES BAKER,
2, New Street, Huddersfield, Agent for the Applicant.