IMPROVEMENTS INTUT 19
Year: 1874

page_text: LETTERS PATENT to Hugh Walbridge Lafferty and Robert Lafferty,
of the City of Gloucester, State of New Jersey, and United States
of America, Sugar Refiners, for the Invention of "IMPROVEMENTS IN
TUT
19

page_text: most Excellent Majesty Queen Victoria to grant unto us, our executors,
administrators, and assigns, Her Royal Letters Patent for the same,
and have made solemn Declaration that we are the first and true
Inventors thereof.
NOW KNOW YE, that we, the said Hugh Walbridge Lafferty and
Robert Lafferty, do hereby declare the nature of the said Invention
to be as follows:-
Our Invention consists in a machine for corrugating cylindrical bodies
or vessels of sheet metal, so as to perfectly preserve their form and
outline and prevent appreciable reduction in the thickness of the material
by stretching or expanding during the operation.
The machine is especially adapted for corrugating the sheet copper
drums or baskets for centrifugal draining machines, but with some
slight modifications may be used for corrugating cylinders composed of
any kind of sheet metal and intended to be used for various purposes.
To this end we employ a cylindrical form made in halves and bolted
together which is lined with steel and grooved as required. This
cylindrical form rests on friction rollers supported upon a bed plate. On
each side of the bed plate and moving in suitable guides a link or
stirrup is placed, these links carrying a roller which is turned so as to
correspond with the grooves in the form and the thickness of the metal
to be corrugated. The lower ends of the links or stirrups are oporated
by an eccentric shaft imparting a vertical movement to the roller
centrally to the cylindrical form.
When the roller stands at its highest point there is sufficient space
allowed below it for placing the metallic cylinder within the form,
leaving the roller on the inside of the metallic cylinder.
The roller is rotated by means of cog wheels and a pulley on a
countershaft, and when by moving the stirrups it is brought into
contact with the metallic cylinder it will form an impression, and at
the same time by friction impart a rotary movement to the cylindrical
form.
The eccentric shaft is provided with a worm wheel which is operated
by a corresponding worm or screw on a rod provided with the necessary
fastenings and with a hand wheel within easy reach of the operator.
This arrangement admits of a gradual adjustmont or movement of tho

page_text: roller toward the inside of the form, and the operation is continued until
the corrugations are deep enough, when the form is taken apart and the
corrugated cylinder removed.
The advantage derived from our improvements is the production of a
simple, durable, and easily operated machine for corrugating metallic
cylinders, so that they shall be perfect in form, and so that the metal
shall not be appreciably expanded and thereby be affected as to its
normal strength.
Having explained the nature of our Invention, we will proceed with
reference to the accompanying Drawings to describe the manner in
which the same is to be performed.
Figure 1 is an elevation of a machine for corrugating metallic
cylinders embodying our improvements, and Figure 2 a vertical
transverse central section of the same.
A cylindrical form A rests by its flanges a, a, and revolves upon
friction wheels B, B', B³, which are supported in suitable bearings or
journals upon a bed plate C. On each side of the bed plate and central
to the form A is a link or stirrup D, D', provided with guides d, d. The
upper ends of these links provide bearings for the journals of a steel
roller E having a corrugated surface. The cylindrical form A is lined
with steel and corrugated to correspond with the roller_and the thickness
of the metallic cylinder.
The steel roller is rotated by means of a spur wheel G permanently
attached to it, and a corresponding pinion H on a countershaft I. A
pulley K is attached to this shaft to which motion is communicated by
means of a belt from a pulley on a line of shafting, or by any other
suitable method of transmission from the prime mover. The lower ends
of the links D, D³, are enlarged and provided with oblong slots d², d²,
for the admission of the eccentric pins m, m³, on the shaft M. The
shaft M is supported in bearings on the bed plate and secured by
caps c, c.
It will be seen that by turning the shaft M in its bearings, the
pins m, m', will move eccentrically to its axis, and impart vertical
motion to the links D, D', which are compelled to move centrally by the
guides d, d, and in order to allow the pins to turn the openings in the
links D, D¹, are made in the form of longitudinal slots d³, d, as stated.

page_text: The link D is held by a set screw collar D³ on the axis of the steel
roller E and is secured to the eccentric shaft M by the nut and
washer m². The link and its connections may be readily removed when
required to admit the metal cylinder which is to be corrugated. The
other link D¹ is held in the guides by a strap D'.
A worm wheel or sector N is attached to a square prolongation m³ of
the pin m², the pitch line of the cogs being concentric with the shaft M.
A worm O attached to a rod or shaft Q is geared to work in the worm
wheel N. The shaft Q is secured to the side of the bed plate C by
suitable boxes P, P, P, and is provided with a hand wheel R convenient
to the operator.
The outer friction wheels B and B are provided with flanges to
prevent the deviation of the cylindrical form A from its normal plane of
rotation, and their bearings are inclined towards the centre of the form
the more effectually to resist the outward pressure thereof.
The operation of our machine is simple and is as follows:-One half
of the form A, the collar D³, nut and washer m³, and link D are removed,
and the metallic cylinder which is to be corrugated is inserted between
the roller E and the lower half of the form A. The several parts are
then replaced and motion is communicated to the roller E through the
cog wheel G. The operator then forces the roller E into contact with
the metallic cylinder by turning the hand wheel R which in turn moves
the worm O and worm wheel N, giving motion to the eccentric shaft M.
The pins m, m³, move the links D, D¹, thereby forcing the roller E
towards the form A. When the roller E comes in contact with the
metallic cylinder, the friction produced will cause the form A to turn on
the friction wheels B, B¹, B³. This operation is continued and the
roller E brought gradually nearer until the corrugations are perfect,
when the metallic cylinder is removed to be replaced by another.
Having described the nature of our Invention, and the manner in
which the same is to be performed, we wish it to be understood that
we do not limit ourselves to the precise details herein described and
illustrated, as the same may be varied without departing from the
nature of our Invention, but we claim as our Invention of improvements
in machines for corrugating cylindrical bodies or vessels of sheet metal,
the combination in a machine for corrugating metallic cylinders of a
cylindrical form or mould A and a corrugated roller E revolving within

page_text: the same and eccentrically thereto, and having a movement towards
and from the inner surface of the form or mould, substantially as set
forth.
In witness whereof, we, the said Hugh Walbridge Lafferty and
Robert Lafferty, have hereunto set our hands and seals, this
Ninth day of February, A.D. 1874.