IMPROVEMENTS IN THE CONSTRUCTION AND FITTING OF THE TRAVELLING WHEEL AXLES OF PORTABLE AND TRACTION ENGINES
Year: 1876

page_text: LETTERS PATENT to John Dunnell Garrett, of Buckau, near Magdeburg, Prussia,
but at presont residing at Delahay Street, in the City of Westminster, Agri-
cultural Implement Maker, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION AND FITTING OF THE TRAVELLING WHEEL AXLES OF PORTABLE
AND TRACTION ENGINES."
Sealed the 21st November 1876, and dated the 30th May 187
PROVISIONAL SPECIFICATION left by the said John Dunnell Garrett at the
Office of the Commissioners of Patents on the 30th May 1876.
JOHN DUNNELL GARRETT, of Buckau, near Magdeburg, Prussia, but at present
residing at Delahay Street, in the City of Westminster, Agricultural Implement
Maker. "IMPROVEMENTS IN THE CONSTRUCTION AND FITTING OF THE TRAVELLING
WHEEL AXLES OF PORTABLE AND TRACTION ENGINES."
The object of this Invention is so to construct the axles for the travelling wheels
of portable and traction engines that they will admit of being attached directly to
the shell of the boiler, and provide for a circulation of air between the boiler and
the axles to assist in keeping the latter from heating. Instead of using crank
axles as is usual I employ trunnions, which are attached to the opposite sides of the
boiler, and these I form in dies actuated by hydraulic pressure.
The axle is composed of a pierced disc of iron dished out in the act of moulding
to shape, and of faggotted iron, which is connected to the disc in and by the opera-
tion of moulding and shaping the mass. The lower die consists of a hollow block
of metal fitted with loose pieces which are to give shape to the journal portion of
the axle, and the upper die is constructed with a projecting coned centre, which
will convert the disc into a trumpet mouth-shaped piece, leaving a broad flange for
bolt holes. This upper die is also provided with projecting pins for formning the
bolt holes, and for converting the metal displaced by these pins into bosses. Raised
rings are formed around these pins, their action being to present the lateral
spreading of the metal, and cause it to fill the space to which it is confined. In the
lower dio a recess is formed at about the line of junction of the disc and faggotted
iron for the reception of any excess of metal that the dies may contain. The metal
is brought to welding heat before being placed in the fixed die, and on the upper die
being brought down the pressure put on the heated metal will produce a perfect weld.
[Price Gd.]

page_text: It will be understood that any desired set may be given to the axle by giving the
lower die the requisite shape. Thus the fitting of the axles in place will be greatly
facilitated, as the only skilled labor required will be the chipping or facing of the
bosses to ensure a steady bearing against the boiler side. When the axle is secured
in place by bolts and nuts there will by reason of the raised bosses be a free space
for the circulation of air between the axle and the boiler, and thus the tendency of
the axle to heat will be greatly diminished.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Dunnell Garrett in the Great Seal Patent Office on the 30th
November 1870.
JOHN DUNNELL GARRETT, of Buckan, near Magdeburg, Prussia, but at present
residing at Delahay Street, in the City of Westminster, Agricultural Implement
Maker. "IMPROVEMENTS IN THE CONSTRUCTION AND FITTING OF THE TRAVELLING
WHEEL AXLES OF PORTABLE AND TRACTION ENGINES."
The object of this Invention is so to construct the axles for the travelling wheels
of portable and traction engines that they will admit of being attached directly to
the shell of the boiler and provide for a circulation of air between the boiler and
the axles to assist in keeping the latter from heating. Instead of using cranked
axles as is usual 1 employ trunnions to receive the travelling wheels. These
trunnions are provided with flanges to receive screw bolts for attaching them to
the sides of the boiler, and they are formed in dies actuated by hydraulic pressure.
In Sheet I. of the accompanying Drawings Fig. 1 shows in side view my
improved construction of flanged axle as applied to the shell of the boiler of a
traction engine, and Fig. 2 is a front view of the same. Fig. 3 is a partial section
of the axle thus applied, and Fig. 4 shews in front view the inner or flanged end
of the axle provided with raised rings or bosses, which form the surfaces of the axle
that bear against the shell of the boiler.
The mode of manufacturing this axle is illustrated in Sheet 11. of the Drawings,
where Figs. 5 represent in vertical section a pair of upper and lower dies for
bringing the axle to shape by hydraulic pressure, and Fig. 6 is a plan view of the
lower die.
The axle is composed of a pierced disc of iron A (see Figs. 5) and of fagotted
iron B, which is connected to the disc in and by the operation of welding and
moulding the mass to bring the same to the shape shewn in section at C, C. These
pieces A and B while in a state of welding heat are placed in the lower die, and
by means of hydraulic pressure the upper die and lower dies are brought together
to effect the compound welding and moulding operation. The lower die consists
of a hollow block of metal a coned internally for the greater portion of its depth,
and resting upon a plate carried by the table of the hydraulic press. The block a
is fitted at bottom with a circular plate b grooved on its under side, and above this
are fitted three pieces b¹ which give shape to the journal portion of the axle. The
upper ends of these portions b₁ of the die are coned to receive wedge shaped
pieces above which are placed the pieces c, c, which together with the upper
portions of the pieces b¹ serve to mould the conical portion or shoulder of the axle
where the weld or junction of the parts A, B, are effected. d is the upper die
constructed with a projecting coned centre e for converting the disc into a trumpet
mouth shaped piece and uniting the same by pressure with the faggot B the upper
end of which it serves to hollow out and press laterally against the surrounding
pieces of the lower die. The pieces c of the lower die are each provided with
steel projecting pins f for forming or indenting the bolt holes in the flange, and
for converting the metal displaced by these pins into bosses, raised concentric rings
are formed in steel blocks g fitted to the upper dic, their action being to prevent
the lateral spreading of the metal and cause it to fill the space to which it is

page_text: confined. In the picces b¹ of the lower die an annular recess is formed at about the
line of junction of the disc with fagotted iron for the reception of any excess of
metal that the dies may contain. As the metal is at a welding heat when placed
in the lower die the rise of that dio into contact with the fixed upper die under
the action of a powerful hydraulic press will cause the metal to take the counter-
part figure of the dies, the flow of the metal being greatly assisted by the annular
recess h provided for the reception of the surplus metal. To release the moulded
axle from the lower die a wedge is driven through an opening in the block a
corresponding with the groove in the circular plate b, which plate is thereby lifted,
and with it the loose portions b, b², and c of the die. These pieces now fulling
apart will permit of the axle being taken out of the dic.
The Drawings represent the axle as formed with the usual "set" or inclination.
This is obtained by simply giving a corresponding shape to the parts b₁, b¹, of the
lower die. By thus giving a "set" to the axles in the dies the fitting of the same
to the boiler will be greatly facilitated as the only skilled labor required will be
the chipping or facing of the bosses to ensure a steady bearing against the boiler
sidos. When the axle is secured in place by bolts and nuts there will by
reason of the raised bosses be a free space for the circulation of air between the
axle and the boiler, and thus the tendency of the axle to heat will be greatly
diminished.
Having now set forth the nature of any Invention of "Improvements in the
Construction and Fitting of the Travelling Wheel Axles of Portable and Traction
Engines," and explained the manner of carrying the same into effect, I wish it to
be understood that under the above in part recited Letters Patent I claim-
First. Manufacturing the travelling wheel axles of portable and traction engines
by the compound operation of welding and moulding in dies, constructed as above
described and with the aid of an hydraulic press.
Secondly. The construction of axle above described, which permits of the facile
fitting of the saine to the boiler and provides for the circulation of air between it
and the boiler, as and for the purpose above described.
In witness whereof, I, the said John Dunnell Garrett, have hereunto set my
band and seal, the 25th day of November, in the year of our Lord One
thousand eight hundred and seventy-six.
In the presence of
ARTHUR GEORGE MUMFORD.
JNO. D. GARRETT. (L.S.)