Year: 1886

page_text: I WILLIAM ALLDAY the younger of No. 335 Coventry Road Birmingham in the
County of Warwick Manufacturer do hereby declare the nature of this Invention
to be as follows:—
My invention has reference to such portable forges as have combined with them
rotary blowers or fans such for example as blowers of the kind known as Root's
blowers and my said invention consists in constructing and actuating the rotary
blowers or fans and combining them with the forges in the manner hereinafter
described.
In ordinary portable forges the rotary blower or fan is generally placed on the
bottom or base plate of the forge and is driven by a band or chain and driving
wheels or pulleys. According to my invention I secure the rotary blower or fan
by preference behind the back plate of the forge by means of screw bolts and nuts
the case of the blower or fan being furnished with a bracket or brackets which
abut against the back plate of the forge. The bottom of the case of the blower or
fan is situated at about the same level as the pan of the forge. The tuyere or tue
iron is connected directly with the case of the blower or fan and passes through the
back plate of the forge the said tuyere or tue iron being fitted with a valve or slide
for removing any ashes or dirt which may accumulate in the tuyere.
By this arrangement of the blower or fan all connecting pipes are dispensed
with. Although I prefer to arrange the blower or fan behind the back plate of
the forge yet it may be fixed at the level described to the front or side plate of the
forge or it may be fixed on the underside of the pan of the forge.
I actuate the rotating vanes of a Root blower when such a blower is used by the
following arrangement of toothed gearing. On the case of the blower a horizontal
axis is supported the said axis carrying at its end a crank handle or winch for
working it On the said axis is a large externally or internally toothed wheel
which gears with a pinion on the shaft of the lower set of vanes of the blower.
A second and smaller toothed wheel on the horizontal or handle axis gears with a
pinion on the cranked end of the shaft of the upper set of vanes of the blower.
When a fan having a single set of vanes is used the first described toothed wheel
and pinion only are employed.

page_text: Although I prefer to actuate the vanes of the blower or fan by means of toothed
gearing of the kind described yet the said vanes may be driven by worm and worm
wheels or by means of a lever and rack and. pinion.
Instead of making the case of the blower or fan of a nearly semi circular figure
in cross-section that is having a flat open bottom and a semi-circular body I make
the case of the blower or fan in which the rotating vanes work of a complete
cylinder. By the use of a case of this kind the rotating vanes are completely
encased and produce a greater volume of and a more steady blast of air than when
a case of the ordinary kind is used.
My improvements may be applied. to circular as well as to "square" or rect-
angular forge.
1000

page_text: Improvements in Portable Forges.
I WILLIAM ALLDAY the younger of No. 335 Coventry Road, Birmingham in the
County of Warwick, Manufacturer do hereby declare the nature of my 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 has reference to such portable forges as have combined with them
rotary blowers or fans, such for example as blowers of the kind known as Root's
blowers; and my said invention consists in constructing and actuating the rotary
blowers or fans and combining them with the forges in the manner hereinafter
described.
In ordinary portable forges the rotary blower or fan is generally placed on the
bottom or base plate of the forge and is driven by a band or chain and driving
wheels or pullies. According to my invention I secure the rotary blower or fan by
preference behind the back plate of the forge by means of screw bolts and nuts
the case of the blower or fan being furnished with a bracket or brackets which
abut against the back plate of the forge. The bottom of the case of the blower or
fan is situated at about the same level as the pan of the forge. The tuyere or tue
iron is connected directly with the case of the blower or fan and passes through
the back plate or water cistern of the forge, the said tuyere or tue iron being fitted
with a valve or slide for removing any ashes or dirt which may accumulate in
the tuyere.
By this arrangement of the blower or fan all intermediate connecting pipes and
driving bands or chains are dispensed with.
Although I prefer to arrange the blower or fan behind the back plate of the
forge yet it may be fixed at the level described to the front or side plate of the
forge, or it may be fixed on the underside of the pan of the forge.
I actuate the rotating vanes of a Root blower when such a blower is used by
the following arrangement of toothed gearing. On the case of the blower a
horizontal axis is supported the said axis carrying at its end a crank handle or
winch for working it. On the said axis is a large externally or internally toothed
wheel which gears with a pinion on the shaft of the lower set of vanes of the
blower. A second and smaller toothed wheel on the horizontal or handle axis
gears with a pinion on the cranked end of the shaft of the upper set of vanes of
the blower.
When a fan having a single set of vanes is used the first described toothed wheel
and pinion only are employed. Although I prefer to actuate the vanes of the
blower or fan by means of toothed gearing of the kind described yet the said
vanes may be driven by worm and worm wheels or by means of a lever and rack
and pinion.
Instead of making the case of the blower or fan of a nearly semi circular figure
in cross section that is having a flat open bottom and a semi circular body I make
the case of the blower or fan in which the rotating vanes work of a complete

page_text: .
cylinder. By the use of a case of this kind the rotating vanes are completely
encased and produce a greater volume and a more steady blast of air than when
a case of the ordinary kind is used.
Figure 1 of the accompanying Drawings represents in side elevation; Figure 2
in end elevation and Figure 3 in plan a "square" or rectangular portable forge
containing my improvements; Figure 4 represents in end elevation and Figure 5
in side elevation a portable forge of the kind called a blacksmith's hearth, also
containing my improvements.
The same letters of reference indicate the same parts in the several Figures of
the drawings.
a is the case containing the rotary blower or fan, the said case a being fixed
behind the back plate b of the forge as represented in Figures 1, 2 and 3, or
behind the water cistern c on the back plate 6 of the forge or blacksmith's hearth
as represented in Figures 4 and 5. The fan case a contains by preference two sets
of rotating vanes of a Root blower the said vanes being driven by the gearing
herein after described. The fan or blower case a is situated at about the same
level as the bottom of the pan d of the forge and the said case is furnished with
brackets at e, e which abut against the back plate band are fixed by screw bolts
and nuts as represented in Figures 1. 2 and 3. The fan or blower case a has nearly
the figure of a cylinder as represented in Figures 1 and 5. so that, the rotating
vanes are completely encased for the purpose herein before described.
In the ordinary method of construction only the upper part of the blower is
encased in a nearly semi cylindrical case. According to my invention both the
upper and lower parts of the blower are encased as represented in the drawing,
the lower half of the case having a nearly semi cylindrical figure as well as the
upper half, the whole case having the figure of a cylinder somewhat flattened; but
I do not limit myself to this particular figure of the case: f is the tuyere or
tue iron which is connected directly with the case a of the fan or blower and
passes through the back plate b of the forge. On the underside of the tuyere or
tue iron is a valve or slide g by opening which any ashes or dirt accumulated in
the tuyere may be removed.
In the arrangement of the forge or blacksmith's hearth represented in Figures 4
and 5, the water cistern c is supported on brackets c², e at the back b of the forge
and the tuyere or tue iron f connected directly with the fan case a passes through
the said cistern. The fan case a in this arrangement is connected by the brackets h, h
to the back of the water cistern c as represented.
I will now describe with reference to Figures 4 and 5 the manner in which the
rotating vanes of the fan or blower are worked.
On the back of the water cistern c a horizontal axis i is supported the said axis
carrying at its end or ends, a cranked handle or cranked handles k for working it.
On the axis is a large toothed or spur wheel which gears with a pinion m on
the shaft n of the upper set of vanes of the blower. The shaft n of the upper set
of vanes and the shaft p of the, lower set of vanes of the blower are geared
together by the toothed wheels q, r (indicated in dotted lines) protected by the
cover u. By rotating the axis i by one or both of the handles c, the two sets of
vanes of the blower or fan are driven through the gearing represented. The vanes
of the fan or blower represented in Figures 1. 2 and 3 are driven by gearing of
the same kind. That is to say, the spur or toothed wheel on the driving axis i
(which axis is carried by the back b of the forge) is contained in the case t and
the other gearing or toothed wheels q, r are contained in the case u.
When a single set of vanes is used in the blower the axis of the said vanes is
driven by the toothed wheel and pinion m.
Instead of gearing the vane shafts together (when two set of vanes are used) by
the toothed wheels q, r the said toothed wheels may be omitted and the lower vane
shaft be driven by a large toothed wheel on the driving axis i gearing with a 5
pinion on the lower vane shaft p but I prefer to arrange the gearing in the manner
represented in the drawing.

page_text: Although I have represented the fan or blower as arranged directly at the back
of the forge or at the back of the water cistern behind the back of the forge and
which position of the fan or blower I find most convenient, yet the fan or blower
may be fixed at the level represented to the front plate or side plate of the forge
or on the underside of the pan of the forge.
My improvements may be applied to circular as well as to "square" or rect-
angular forges.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed I declare that I claim
as my invention of "Improvements in portable forges,"
First Fixing the rotating blower or fan behind the back plate of the forge or
behind the water cistern at the back of the forge substantially as hereinbefore
described and illustrated in the accompanying drawings, or in either of the other
positions hereinbefore described.
Secondly Encasing the set or sets of vanes of the blower or fan in a case
preferably of the kind herein before described and illustrated in the accompanying
Drawings.
Thirdly Connecting the tuyere or tue iron of the forge directly to the fan or
blower case and providing the said 'tuyere or tue iron with a valve or slide for the
purpose and substantially as herein before described and illustrated in the accom-
panying Drawings.
Lastly The arrangements or combinations of the parts of gearing herein before
described and illustrated in the accompanying drawings for actuating the rotating
vanes of the fan or blower of the portable forge.