IMPROVEMENTS IN PORTABLE FORGES
Year: 1874

page_text: LETTERS PATENT to John Gustavus Rollins, of Old Swan Wharf,
London Bridge, in the City of London, for the Invention of
"IMPROVEMENTS IN PORTABLE FORGES."-A communication from abroad
by W. P. Kellogg, of Troy, in the State of New York, in the United
States of America.
Sealed the 30th April 1875, and dated the 2nd December 1874.
PROVISIONAL SPECIFICATION left by the said John Gustavus Rollins
at the Office of the Commissioners of Patents, with his Petition,
on the 2nd December 1874.
I, JOHN GUSTAVUS ROLLINS, of Old Swan Wharf, London Bridge, in
the Oity of London, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN PORTABLE FORGES," a communication to me from
abroad by W. P. Kellogg, of Troy, in the State of New York, in the
United States of America, to be as follows :-
The Invention relates to that class of smith's forges known as portablo
forges, and consists in a new combination of parts for making a compact,

page_text: cheap, and efficient forge. For this purpose the blast is derived from a
fan which drives the wind through an opening formed in the fan casc
which is bolted in position under the hearth plate of the forge. Brackets
aro cast or otherwise fixed on the fan case, and these brackets are
bushed so as to receive the ends of the fan shaft, a space being left
between each end of the fan shaft and the bushing to receive oil to
lubricate the bearings.
Motion is communicated to the fan from a heavy rimmed pulley or
wheel turned smooth upon its face or edge, and heavy enough to act as
a fly wheel. The face of this pulley or wheel acts against the face of a
small pulley on the fan shaft.
The shaft of the larger pulley or wheel has its boxes arranged in slots
in the side braces of the stand which supports the forge in which they
slide freely, such boxes being formed with grooves to receive guides or
ways on the sides of the slots, springs being employed to act upon the
boxes, and thereby continually press the large wheel or pulley against
the small pulley on the fan shaft, which latter pulley is covered with
rubber, leather, or other elastic material to give adhesion to the face of
the driving pulley. The springs will not only accommodate themselves.
to any irregularities in the faces of the pulleys, but will automatically
maintain the constant contact of the faces if they should become
worn.
On the overhanging end of the driving shaft is fixed a small pinion,
the teeth of which engage those formed on a fly wheel which revolves
upon a stud projecting from one of the side frames or from a bracket
fixed thereto. This fly wheel is driven by a lever mounted upon a stud
carried by a bracket fixed to the hearth plate or to a side frame, such
lever being connected to the fly wheel by a connecting rod attached to a
crank pin on one of the arms of the fly wheel.
The fan case and bearings for the driving pulleys of the fan are all
supported by and immediately under the hearth plate, the shaft acted
upon by springs is placed centrally under the hearth plate, and the fly
wheel is placed outside the stand and below the plane of the hearth
plate.
Instead of placing the fly wheel outside the stand it may be placed
inside, in which case the connecting rod from the lever would be attached

page_text: to a crank on the shaft of the fly wheel, instead of being attached to a
crank pin on the wheel as before described. This arrangement of the
gearing is important as it is essential to the perfection of portable forges
that they should be compact, and also that they should not be easily
overturned, to which end the machinery is placed under the hearth plate,
nothing standing above it but the lever.
The blast from the fan is received into a chamber immediately under
the hearth plate from which it passes to the fire, preferably through an
annular opening.
In some cases a cover is fixed over the hearth plate so as to enclose
the fire; this cover is provided with swinging doors by which the fire
can be exposed when opened or protected when closed.
TL
3
21
aband of Aucht iman 232
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Gustavus Rollins in the Great Seal Patent
Office on the 2nd June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GUSTAVUS ROLLINS, of Old Swan Wharf, London Bridge, in the City
of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of December, in the
year of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Gustavus Rollins,
Her special license that I, the said John Gustavus Rollins, my
executors, administrators, and assigns, or such others as I, the said
John Gustavus Rollins, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an

page_text: Invention for "IMPROVEMENTS IN PORTABLE FORGES," a communication to
me from abroad by W. P. Kellogg, of Troy, in the State of New York, in
the United States of America, upon the condition (amongst others) that
I, the said John Gustavus Rollins, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Gustavus Rollins, 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 thereof, reference being had to the Drawings
hereunto annexed, and to the figures and letters marked thereon, that is
to say:
Figure 1 is a side elevation on the side of the operator; Figure 2 is a
vertical longitudinal section; Figure 3 is an elevation showing the
opposite side; Figure 4 is a bottom view partly in section, and Figure 5
is a sectional view drawn to a larger scale of one of the bushings to
carry the fan shaft. The same letters are employed in all the Figures
to indicate like parts.
The Invention relates to that class of smith's forges known as portable
forges, and consists in a new combination of parts for making a compact,
cheap, and efficient forge. For this purpose the blast is derived from a
fan A which drives the wind through an opening A' formed in the fan
case A which is bolted in position under the hearth plate D of the forge.
Brackets or braces A³ are cast or otherwise fixed on each side of the fan
case, and these brackets are bushed, preferably with bronze bushings.A*
so as to receive the ends of the fan shaft, a space & being left between
each end of the fan shaft, and the inner end of the bushing A' to receive
oil through the hole d' to lubricate the bearings.
Motion is communicated to the fan A. from a heavy rimmed pulley or
wheel E turned smooth upon its face or edge, and heavy enough to act
as a fly wheel. The face of this pulley or wheel acts against the face of
a small pulley E' on the fan shaft.

page_text: which end the machinery is placed under the hearth plate, nothing
standing above it but the lever.
The blast from the fan is received into a chamber B immediately
under the hearth plate from which it passes to the fire, preferably
through an annular opening as shown.
In some cases a cover ✗ is fixed over the hearth plate so as to enclose
the fire; this cover is provided with swinging doors X', X², hinged
thereto at x, x¹, x², x³, x², by which the fire can be exposed when opened
or protected when closed.
Although the legs of the stand are shown in the Drawings as
formed of cast iron it is preferred to form them of wrought-iron gas
piping.
Having thus described the nature of the said Invention and the mode
in which the same is carried into effect, I would have it understood that
what I claim and desire to secure by Letters Patent is,-
First. The combination substantially as shown and described in a
portable forge of a blast fan, and system of friction pulleys and adjustable
journal boxes and springs for constantly maintaining the contact of
the faces of the pulleys, all arranged below the plane of the hearth plate
and operated by a lever in manner substantially as herein shown and
described.
Secondly. I claim the employment of a lever or handle in a fan
blowing portable forge arranged to operate the fan in manner sub-
stantially as herein shown and described.
Thirdly. I claim the employment in a fan blowing portable forge of
friction gearing for driving the fan in lieu of belts or toothed wheels,
in manner substantially as herein shown and described.
Fourthly. I claim in a fan blowing portable forge having the fan
driven by friction gearing the employment of sliding boxes E³ to carry
the driving shaft, such boxes being acted upon by springs for
automatically maintaining the friction of the driving wheels constant,
in manner substantially as hercin shown and described.
Fifthly. I claim the employment in bronze or other bushings for
carrying the fan shaft of a cavity to be employed as a reservoir for oil,
in manner substantially as herein shown and described.

page_text: And, Sixthly. I claim the employment when using a cover to the
forge of swinging doors by which the fire can be exposed when opened
or protected when closed, in manner substantially as herein shewn and
described.
In witness whereof, I, the said John Gustavus Rollins, have here-
unto set my hand and seal, this Second day of June, in the
year of our Lord One thousand eight hundred and seventy-
five.