Improvements in Friction Gear for Yarn Beaming and other Machines.
Year: 1894

page_text: Date of Application, 15th Nov., 1394
Complete Specification Left, 15th Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Friction Gear for Yarn Beaming and other
Machines.
I, WILLIAM LANCASTER, of 44 Byrom Street, Blackburn in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:
--
My invention relates to improvements in friction gear consisting of more than
one friction plate, such as is used in sizing, beaming, dressing and other machines for
lapping yarn upon beams or rollers in preparing the same for weaving, and has for
object to reduce wear and tear and obviate loss of power in driving.
Friction gearing at present used for the above named purposes consists generally
of two or more plates fitted upon a shaft, and pressed together by means of levers
weights and side bowls, so as to produce side frictional contact, cr frictional side grip.
This method of obtaining the grip or frictional power by applying the pressure of levers
and weights on one side of the plates, necessarily presses or jams the other side of the
plates against a stationary boss or bearing thereby causing considerable wear and
tear, as well as loss of driving power. To obviate these disadvantages I so contrive
the friction plate bosses that the two outside friction plates, as well as the
additional inside plates-can readily be drawn tight together without involving any
loss of side pressure against stationary bearings.
In carrying out my invention I arrange for the boss or centre portion of one of
the outside friction plates to extend through the centres of all the other plates, and
upon the outer end of this boss which is screwed I provide a flanged disc, the bore
or centre portion of which is correspondingly screwed. The inner face of the
Hanged part is made taper or inclined, and when the plates are in gear abuts against
a projection or boss formed upon or attached to the outer face of the last friction
plate. This projection or boss has a face similarly inclined but at the opposite
angle to that upon the flange of the disc in such a manuer that when the two faces
are brought together they form a V-groove.
In this groove I arrange for an adjustable pulley of corresponding V-section to
rotate when it is desired to set the friction plates in motion, the pulley being pivoted
or hung upon a suitable lever or arm for this purpose.
By this arrangement the pressure of the pulley within the V-shaped groove
formed by the inclined faces of the flange and of the boss upon the last friction plate
causes the latter to be forced against the intermediate friction plates and against
the outer plate. The position of the flanged disc can readily be adjusted by
screwing it nearer to or further from the boss upon the last triction plate, and in
this way the relative degree of pressure exerted upon the friction plates by the
rotation of the V-shaped pulley can be adjusted as required.
The friction plates may be made wholly or partly of metal or other suitable
material.
Dated this Difenuh d
CAT
1 1.004

page_text: COMPLETE SPECIFICATION.
Improvements in Friction Gear for Yarn Beaming and other
Machines.
I, WILLIAM LANCASTER of 44 Byrom Street, Blackburn in the County of
Lancaster, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My invention relates to improvements in friction gear consisting of more than
one friction plate, such as is used in sizing, beaming dressing and other machines
for lapping yarn upon beams or rollers in preparing the same for weaving, and has
for object to reduce wear and tear and obviate loss of power in driving.
Friction gearing at present used for the above-named purposes consists generally
of two or more plates fitted upon a shaft and pressed together by means of levers,
weights and side bowls, so as to produce side frictional contact or frictional side grip.
This method of obtaining the grip or frictional power by applying the pressure of
levers and weights on one side of the plates necessarily presses or jams the other side
of the plates against a stationary boss or bearing thereby causing considerable wear
and tear, as well as loss of driving power.
To obviate these disadvantages I so contrive the friction plate bosses that the
two outside friction plates-as well as the additional inside plates-can readily be
drawn tight together without involving any loss of side pressure against stationary
bearings.
In order that my invention may be clearly understood reference is made to the
accompanying drawing upon which :-
Figure 1 is an elevation and part section of an arrangement of friction gear
according to my invention.
In carrying out my invention I arrange the outside friction plates A A' as shewn
on Figure 1 so that the boss C or centre portion of one, A, which slides in a
longitudinal direction upon a feather or key secured to the shaft extends through
the centres of all the other plates, B B', A', and upon the outer end of the boss C
which is screwed, I provide a flanged disc D, having its bore or centre corre-
spondingly screwed, to admit of its being advanced towards or retired from the
other friction plate A', for the purpose of adjustment, being secured by means of
a set screw or lock nut or equivalent device.
The inner face d of the flanged disc D is made taper or inclined, and when the
plates are not in gear abuts against a projection or boss E formed upon or attached
to the outer face of the last friction plate A'. This projection or boss E has a
face e inclined at the opposite angle to that upon the flanged disc D, and arranged
in such a manner that when the disc D and the boss E are brought together, their
inclined faces d and e will form a V-groove.
In this groove I arrange for an adjustable pulley or split taper bowl F of
corresponding V-section to rotate when it is desired to set the friction plates in
motion. Within the taper bowl F which is divided centrally is formed a chamber
in which is placed a suitable bow-spring G or equivalent device for imparting
elasticity to the bowl in the action of drawing the friction plates together. The
taper bowl F may be pivoted or hung in a suitable position upon a lever or arm H
conveniently arranged for the purpose of bringing it into frictional contact with
the V-groove as and when desired, the lever or arm being operated by means of a
cam, a catch device from the shaft which drives the weaver's beam, or by hand.
By the above described arrangement the pressure of the taper bowl or pulley F
against the inclined faces d and e of the flanged disc D, and of the boss E upon the
last friction plate A¹ causes the plates A and A¹ to be forced against the
intermediate friction plates B and B¹.

page_text: By screwing the flanged disc D nearer to or further from the boss E upon the
last friction plate A', the relative degree of pressure exerted upon the friction
plates by the rotation of the taper bowl F in the V-groove can be adjusted as and
when required.
The friction plates may be made wholly or partly of metal or other suitable
material.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
Friction gear for yarn beaming, dressing and like machines, comprising two or
more friction plates mounted upon a common boss C carrying an adjustable flange
D having its inner face bevelled or inclined so as to form with a corresponding
inclined or bevelled projection E upon the outer face of the last friction plate A' a
V-shaped groove, in combination with a split or divided taper bowl F, the whole
arranged substantially as and for the purposes described.
Dated this Fifteenth day of August 1895