IMPROVEMENTS IN THE CONSTRUCTION OF BLOCKSMITHS' HEARTHS, AND IN TRANSMITTING MOTION TO FANS FOR BLOWING, VENTILATING, AND OTHER PURPOSES." PROVISIONAL SPATION
Year: 1881

page_text: LETTERS PATENT to Richard Russell Gubbins, of 17, Park Road, New Cross, in
the County of Surrey, Gentleman, for an Invention of "IMPROVEMENTS IN
THE CONSTRUCTION OF BLOCKSMITHS' HEARTHS, AND IN TRANSMITTING
MOTION TO FANS FOR BLOWING, VENTILATING, AND OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Richard Russell Gubbins at
the Office of the Commissioners of Patents on the 2nd February 1881.
RICHARD RUSSELL GUBBINS, of 17, Park Road, New Cross, in the County of
Surrey, Gentleman. "IMPROVEMENTS IN THE CONSTRUCTION OF BLOCKSMITHS'
HEARTHS, AND IN TRANSMITTING MOTION TO FANS FOR BLOWING, VENTILATING,
AND OTHER PURPOSES."
This Invention relates to certain improvements in the construction of blacksmiths'
hearths or so called portable forges, and in transmitting motion to fans thereof, and
other fans for blowing, ventilating, and other purposes.
The hearth or forge pan is made with metal corner pieces drilled through
vertically, through which is passed a collared pin screwed at one end to bolt on the
top of the pan corners, and the other end of the pins below the collar is of size to fit the
interior of the tubular legs of the apparatus, and are shrunk into the said tubular
legs, the lower portions of the legs passing through and being keyed into bosses,
which bosses are cored out to receive the ends of cross and tie bars for holding the
frame rigidly together. The sides and bottom of the hearths are sheet metal
plates, which are secured to the corner pieces.
The fan box with its spindle, and the tuyere and blast pipe are bolted on to and
carried by a plate secured at the head of the hearth, and two brackets secured
under the hearth or pan carry a shaft upon which are mounted the bearings of the
driver shaft, fly wheel, and clutch mechanism with quadrant rack and pinion on
the clutch box cover, and reciprocating handle for operating the quadrant rack.
The bearings of the driving shaft and wheel are secured in the bracket so as to
allow of the same swinging slightly to allow of adjustment by a set screw for
מ.

page_text: taking up the slackness of the band which drives the fan shaft off the driving
wheel. The construction is such that twine may be used for the driving band, or
gut band may be used.
The clutch box for actuating the driving shaft consists of a box keyed or cottered
upon the driving shaft and recessed with an inner flange so as to have formed
there in an annular groove, and a cam arm is provided inside the box, one end of
which cam arm carries a block fitting between the flange of the annular ring, and
the other end of the cam arm carries a stud projecting outward.. A hole made
through the centre of cam arm so that same is free to swing around the driving
shaft, and said hole in the cam arm is opened or cleared away on one side. The
free plate of the clutch box carrying the pinion in gear with the driving quadrant.
has a hole therethrough which receives the pin on the outer side of the cam
arm.
Now when the down stroke of the reciprocating handle is made to drive the
apparatus the free plate of the clutch box which is holding the pin of the cam arın
acting thereupon moves the said cam arm by reason of the opened or cleared hole
therethrough away from the shaft, and the block at the other end of the cam arm
is jammed against the flange of the clutch box, so clutching and driving the driving
shaft; upon the back stroke, however, the cam arm is brought by the free plate
back again so that the hole therein, and the faces of the block at the end thereof,
and the flanges of the clutch box are concentric, and the clutching is released and
all parts run free and are carried back ready for the next down stroke..

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Richard Russell Gubbins in the Great Seal Patent Office on
the 2nd August 1881.
RICHARD RUSSELL GUBBINS, of 17, Park Road, New Cross, in the County of
Surrey, Gentleman. "IMPROVEMENTS IN THE CONSTRUCTION OF BLACKSMITHS'
HEARTHS, AND IN TRANSMITTING MOTION TO FANS FOR BLOWING, VENTILATING,
AND OTHER PURPOSES."
This Invention relates to certain improvements in the construction of blacksmiths'
hearths or so called portable forges, and in transmitting motion to fans thereof, and
to other fans for blowing, ventilating, and other purposes.
The Invention will be readily ascertained by the following particular description
and the references made therein to the accompanying Sheet of Drawings, wherein
Fig. 1 is a side view, and Fig. 2 a plan view of forge constructed with these
improvements comprised.
Fig. 3 is a view of the back end of forge from left of Figs. 1 and 2.
Fig. 3 represents detail of the corner pieces; Fig. 3b, the collared corner piece
bolts and Fig. 3c plan of the truss frame for legs and cross ties.
Fig. 4 shows detail of clutch box mechanism, and Fig. 5 a modification of part
of clutch.
The hearth or forge pan A is made of sheet metal bolted or rivetted to cast
metal (malleable iron) corner pieces B, which said corner pieces are drilled or
cored through vertically at b to receive the upper end or pins c of the legs of the
forge. The said legs may be made of an upper part or pin C with a collar c to
carry the weight of the forge pan A, and a tubular continuation downwards shrunk
on to them for the sake of greater lightness, and for the further facility of adding
casters to the forge, or they may be made solid throughout. The upper part of the
pins or legs C, c, are secured at the end to bolt by nuts c¹ on to the top of the pan
corners B. The lower portion of the legs pass through and are keyed into bosses D
of a truss frame (Fig. 3c) consisting of, in the present instance, a parallelogram of
side and end bars E braced by two diagonals E¹.
The sides A¹ and bottom A² of the hearth A are of sheet metal plates which are
rivetted or screwed to the corner pieces B, and lie flush into recesses b' thereof, and
the shelf piece B₁ of the corner pieces afford support to the bottom plate A² of the
hearth. The division plate A³ forms the water trough at the end of the forge
hearth.
The fan box F with its spindle and tuyere Fl and blast pipe are bolted on to and
carried by a plate G secured at the head of the hearth, and two brackets H secured
under the hearth or pan carries a shaft I upon which are mounted the swinging
bearings K upon a stud L, at lower end whereof is carried the fly wheel M and
clutch mechanism N.
The quadrant rack O is fixed on shaft I and gears with pinion N¹ on the clutch
box cover, and the reciprocating arm P also fixed on to the shaft I operates through
the link P¹ and treadle P the said quadrant rack O, or instead of using the treadle
the treadle bar P³ has mounted thereon a socket piece P' which receives a lever arm
which by backward and forward movement will operate the quadrant O through
the treadle and link rod P¹.
The bearings K of the fly-wheel stud L and fly wheel M are secured on the cross
shaft I so as to allow of the same swinging slightly to allow of adjustment in the
eye of an arm Q by a stud or bearing K and fly nut Q for taking up the slackness
of the band R which drives the fan shaft F2 off the driving wheel M. The
construction is such that twine may be used for the driving wheel, or gut band
may be used and be readily replaced as required.

page_text: The clutch box N for actuating the fly wheel shaft L consists of a box, shown in
detail Fig. 4, keyed or cottered upon the fly wheel shaft L and recessed with an
inner flange d so as to have formed thereon an annular groove e, and a cam arm f
is provided inside the box, one end of which cam arm carries a block f¹ fitting
between the flanges of the annular groove e, and the other end of the cam-arm
carries a stud g projecting outwards. A hole is made through the centre of the
cam-arm so that same is free to swing around the driving shaft, and said hole / in
the cam-arm is opened or cleared away on one side. The free plate i of the clutch
box N carrying the pinion N¹ is in gear with the driving quadrant O, has a hole K
therethrough which receives the pin g on the outer side of the cam-arm.
Instead of lining the double flange of the clutch box, the solid part fl of the
cam-arm may be provided with a groove (Fig. 5) which will grip on to the
flange d.
Now when the down stroke of the reciprocating handle P is made to drive the
apparatus the free plate i of the clutch box N which is holding the pin 'g of the
cam-arm facting thereupon moves the said cam arm f by reason of the opened or
cleared hole h therethrough away from the shaft L, and the block f' at the other
end of the cam-arm f is jammed against the flanges d, N, of the clutch box, so
clutching and driving the driving shaft L. Upon the back stroke however the cam
arm fis brought by the free plate i back again so that the hole h therein and the
faces of the block flat the end thereof, and the flanges d, N, of the clutch box
are concentric, and the clutching is released and all parts run free and are carried
back ready for the next down stroke, and so on.
This clutch mechanism and fan driver may be employed for stationary or other
blowing fans for ventilating and other like or similar purposes.
Having now described the nature and particulars of the said Invention in such
wise that the same may be readily carried into practical effect, I claim,-
First. In a blacksmith's hearth or so called portable forge the frame thereof of
sheet metal connected and built up with the corner picces B and collared bolt
pins C, c, and nuts c¹ for receiving the hearth side plates A' and bottom A2 carrying
the driving mechanism, constructed as and for the purpose herein set forth and
shown by the respective Figures of the accompanying Drawings.
Second. In. combination with the tubularly mounted bearing K of the fly
wheel M, the clutch box mechanism N, N', and driving quadrant O with the
setting screw for adjustment of the bearing K in the eye of the arm Q, as and for
the purpose herein set forth and shown by the Drawings.
In witness whereof, I, the said Richard Russell Gubbins, have hereunto set
my hand and seal, this Thirtieth day of July, in the year of our Lord One
thousand eight hundred and eighty one.
R. R. GUBBINS. (L.S.)