IMPROVED FRICTION COUPLING FOR HAULING OR WINDING APPARATUS OR MACHINERY
Year: 1884

page_text: We, JAMES FARRAR, EDWARD HORNBY BIRLEY, and THOMAS DUNSTAN, all of
the old foundry, Barnsley in the county of York, engineers, do hereby declare the
nature of our invention for IMPROVED FRICTION COUPLING FOR HAULING OR
WINDING APPARATUS OR MACHINERY, to be as follows:― .
"
A hollow drum, worked by the engine or prime mover having arms on one side,
and a turned internal surface, is securely fixed to a sleeve or shaft by a boss and
key; within this hollow drum is a ring of metal having arms, and a boss by which
it is secured to a sleeve or shaft on which is fastened the apparatus or machinery
to be driven by friction, the said ring is divided through on the side furthest from
its arms in the shape of a letter V, in this V is placed a wedge, by forcing this
wedge into the V the ring is extended and so presses against the internal surface
of the hollow drum as to cause such friction that eventually it grips and communi-
cates motive power to the hauling or winding apparatus or machinery, an inclined
plane fitted with a boss and collars and sliding on the shaft or sleeve when moved
by its proper levers, is used to force the wedge into the V groove of the ring, and a
suitable tongue piece with an adjusting set screw is used to take up wear and is
placed at the end of the wedge furthest from the V groove, the wedge is maintained
in position by suitable guides prepared for it on the ring boss.

page_text: •
Improved Friction Coupling for Winding or Hauling Apparatus
or Machinery.
We, JAMES FARRAR, EDWARD HORNBY BIRLEY and THOMAS DUNSTAN, all of
the Old Foundry, Barnsley, in the County of York, Engineers, do hereby declare
the nature of our invention for AN IMPROVED FRICTION COUPLING FOR WINDING
OR HAULING APPARATUS OR MACHINERY and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
The primary object of our invention relates to the construction and application
of a friction coupling of simple construction, to winding or hauling machinery,
having great holding or driving power when forced in frictional contact, and being
easy to release or force in contact, and to put in and out of action, without strain
or shock to the driving or driven machinery; with consequent freedom from
breakdowns & stoppages.
Our invention consists of a friction coupling-as follows-A hollow drum or pulley,
having arms on one side, and a turned projecting surface on the other is securely
fixed to a sleeve (or shaft) by a boss, so as not to be capable of sideways motion.
This drum runs loose on the shaft or sleeve when the friction gear is not in
operation; a ring of metal having an arm, or arms, connecting the ring and boss, is,
by means of this boss, securely keyed to the sleeve or shaft, the said ring is divided
through the side furthest from its arms in the shape of the letter V, in this division
is placed a wedge, by forcing this wedge up into the V, the ring is extended and
is so pressed against the internal surface of the projecting part of the hollow drum
or pulley, as to cause such friction that eventually it grips, and communicates
motive power to the drum or pulley; an inclined plane, fitted with a boss and
collars, and being capable of end ways movement on the shaft or sleeve when
operated by suitable levers in the said collars, is used to force the wedge into the
V groove of the friction ring, and a suitable tongue piece, with an adjusting set
screw, is arranged to take up wear, and is placed at the end of the wedge furthest
from the V groove,
The wedge is maintained in position by suitable guides prepared for it on the
friction ring boss.
Referring to the drawing-Fig. 1 is an elevation and Fig. 2 a cross section of
the friction coupling; the pulley runs loose on the shaft; (or on a sleeve on the
shaft if so required). The drawing shows the coupling in its most approved form.
Like letters indicate like parts in the drawings. S is the shaft driven by the prime
mover, from which power has to be communicated to the pulley or drum D, running
loose on the shaft S. On S is secured the friction ring F and the inclined plane I.
The drum or pulley D has a projecting surface on the side furthest from the arms
turned on the inner surface T, the outer side of the projecting surface may be
utilized as a brake ring if required. By moving the inclined plane I (through
. suitable levers) parallel with the axis of the shaft, the wedge W is raised and forced

page_text: into the V groove which it extends, causing such friction that the ring seizes the
drum or pulley, and motion is thereby communicated. Suitable guides G are
provided to hold the wedge in position and an adjustable tongue piece and set
screw A. are provided to take up wear. The ring F may be made loose if preferred
and bolted to the arms which secure it to the boss, instead of being as shown in
one piece.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed―We declare that what
we claim is
1. The use, for winding or hauling apparatus or machinery of the friction
coupling herewith described having a friction ring extended by a wedge and
inclined plane-and seizing the inner surface of a suitable drum or pulley to which
motion is communicated.