IMPROVEMENTS IN MECHANISM FOR PRODUCING VARIABLE ROTATORY VELOCITIES APPLICABLE TO SLUBBING AND ROVING FRAMES AND OTHER MACHINERY FOR VARIOUS PURPOSES."
Year: 1877

page_text: LETTERS PATENT to William McNaught, of Rochdale, in the County of Lan-
caster, Engineer, for the Invention of "IMPROVEMENTS IN MECHANISM FOR
PRODUCING VARIABLE ROTATORY VELOCITIES APPLICABLE TO SLUBBING AND
ROVING FRAMES AND OTHER MACHINERY FOR VARIOUS PURPOSES."
PROVISIONAL SPECIFICATION left by the said William McNaught at the
Office of the Commissioners of Patents on the 22nd September 1877.
WILLIAM MCNAUGHT, of Rochdale, in the County of Lancaster, Engineer.
"IMPROVEMENTS IN MECHANISM FOR PRODUCING VARIABLE ROTATORY VELOCITIES
APPLICABLE TO SLUBBING AND ROVING FRAMES AND OTHER MACHINERY FOR
VARIOUS PURPOSES."
My Invention relates to a method of producing variable speed or rotatory velocity,
and is applicable to slubbing and roving frames and other machines where precise
or minute changes of speed are required, and it consists of a combination of
mechanism formed by two cones in suitable bearings with their axes placed at an
angle to each other, and in the same plane, and with their two smaller and larger
ends opposite each other, so as to leave a parallel space between their peripheries,
in the middle of which space there is a shaft in suitable bearings, with its axis in the
same plane as the axes of the cones; this shaft has a friction wheel or steel "mill"
upon it, which can be slided to and fro, being connected to the shaft by a key and
key groove.
The two cones are or may be driven by a wheel running loose on the middle
shaft, gearing with a wheel on each "cone." These cones are pressed towards each by
springs or other sufficiently elastic arrangements, and against the friction pulley or
"mill" on the shaft between them; and as the cones are driven in the same direction,
the friction pulley or mill is rotated at variable speed accordingly as the pulley is
slided on the shaft to the smaller or larger ends of the cones, and the variable
rotatory speed thus obtained is transmitted by the shaft to the gearing or mechanism

page_text: to be driven. The friction pulley or "mill" is slided to and fro on the shaft by a fork
connected with the mechanism which is to produce the changes when this is to
be done by self-acting means.
My Invention may also be accomplished by arranging the friction wheel or mill
between the opposite parallel surfaces of two discs or face plates rotated in opposite
directions, the variable speed being obtained by sliding the friction wheel or mill
nearer to or further from the axis of the discs, which are pressed against the friction
pulley or mill by suitable elastic arrangements.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William McNaught in the Great Seal Patent Office on the 12th
March 1878.
WILLIAM MONAUGHT, of Rochdale, in the County of Lancaster, Engineer.
"IMPROVEMENTS IN MECHANISM FOR PRODUCING VARIABLE ROTATORY VELOCITIES
APPLICABLE TO SLUBBING AND ROVING FRAMES AND OTHER MACHINERY FOR
VARIOUS PURPOSES."
My Invention relates to a method of producing variable speed or rotatory velocity,
and is applicable to slubbing and roving frames and other machines where precise
or minute changes of speed are required, and it consists of a combination of
mechanism formed by two cones in suitable bearings, with their axes placed at an
angle to each other, and in the same plane, and with their two smaller and larger
ends opposite each other, so as to leave a parallel space between their peripheries,
in the middle of which space there is a shaft in suitable bearings, with its axis in
the same plane as the axes of the cones; this shaft has a friction wheel upon it,
which can be slided to and fro, being connected to the shaft by a key and key
groove.
"
The two cones are or may be driven by a wheel running loose on the middle
shaft, gearing with a wheel on each "cone." These cones are pressed towards each
other by springs or other sufficiently elastic arrangement, and against the friction
pulley on the shaft between them, and as the cones are driven in the same direction,
the friction pulley is rotated at variable speed, accordingly as the pulley is slided on
the shaft to the smaller or larger ends of the cones, and the variable rotatory speed
thus obtained is transmitted by the shaft to the gearing or mechanism to be driven.
The friction pulley is slided to and fro on the shaft by a fork connected with the
mechanism which is to produce the changes when it is to be done by self-acting
means.
My Invention may also be accomplished by arranging the friction wheel between
the opposite parallel surfaces of two discs or face plates rotated in opposite direc-
tions, the variable speed being obtained by sliding the friction wheel nearer to or
further from the axis of the discs, which are pressed against the friction pulley by
suitable elastic arrangements, but I prefer the arrangement before described.
Fig. 1 is a plan, and Fig. 2 is a side view, both partly in section, illustrating the
mode of carrying my Invention into effect.
Fig. 3 being a detached side view of one of the stands for the bearings; a is the frame
part, upon which are two stands (b) for the bearings of the shaft c, which has a key-
way o¹ in its lengthway (as shown) for a key to slide in, by which the shaft cis

page_text: rotated with the pulley d. On each side of the shaft (c) there is a cone drum (e),
both drums of equal size; each cone drum having its bearing in stands secured to
the frame part (a) by screws. The sides of the two cone drums, which come
opposite each other, are placed parallel to and in the same plane as the axis of the
shaft c. Each cone drum e has an obtuse bevel wheel (f¹) of the same size, secured
at one end, as shown, which gears with a corresponding wheel g, working loose on
the shaft c, on the boss of which wheel there is a spur (or it may be bevel) wheel /
secured, which is brought in gear with the driving power, so that the two equal
sized cone drums e are rotated at equal speeds in the same directions, and drive the
pulley d on the shaft c.
The holes for the screws in the stands f for the bearings of the cone drums e are
or may be slightly slotted to allow set screws i, on the side of the frame (a) acting
against the ends of the stands to press the stands forward until the cone drums e
are brought with sufficient pressure against the pulley d. Or a spring k may be
placed between the set screws i and the stands f, though when adjusted there will
be sufficient elasticity in the stands themselves to keep up the required constant
pressure of the cone drums upon the pulley d. The rotary motion imparted to the
pulley d is given to the shaft c, which is connected or geared with the mechanism
to be driven.
In a roving frame for preparing fibrous materials the shaft c is or may be
connected with the differential apparatus.
The changes of speed are effected by sliding the pulley d to and fro on the shaft
c by a rod and clutch fork acting upon the groove in the pulley d, and such rod
for roving frames is or may be connected with the mechanism used in the ordinary
roving frame for shifting the driving belt on the cone pulleys.
The shaft c may be made tubular, and have two opposite slits in it, so that a rod
in the interior of such tube shaft can be connected with the sliding pulley d.
Instead of two cone drums e it is obvious that four or more cone drums may be
arranged to drive the same pulley d, thus obtaining greater adhesion if required.
I have now particularly described my Invention and mode of carrying the same
into effect.
In witness whereof, I, the said William McNaught, have hereunto set my
hand and seal, this Eighth day of March, in the year of our Lord One
thousand eight hundred seventy-eight.
WILLIAM MCNAUGHT. (L.S.)