Improvements in Apparatus for Engaging and Disengaging Clutches.
Year: 1886

page_text: Date of Application, 16th Mar., 1886.
Complete Left, 14th Dec., 1886.
Complete Accepted, 8th Feb., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Engaging and Disengaging
Clutches.
I, ELLIS WOOD, Engineer 140 Jack Lane, Hunslei, Leeds, in the County of York,
do hereby declare the nature of my invention for "IMPROVEMENTS IN APPARATUS FOR
ENGAGING & DISENGAGING CLUTCHES to be as follows:-
A thread is chased or screwed on the shaft which carries the friction, clutch or
other driving gear, a long cylindrical nut is made to fit the screw, a groove is turned
in the circumference on one end of the nut, a pair of friction straps or friction clip is
fitted into the groove, the said straps or clip being made to revolve by a stud or pin
projecting from the boss or arms of the driving pulley or wheel, the friction of the
straps or clip being sufficient to cause the nut to revolve on the serowed shaft, the
friction or other gear is pushed or screwed into contact, when the machine revolves.
On the other end of the said nut, two arms project in a line with the diameter of
the nut, the ends of the arms being bent outwards at a right angle to the said arms, so
that when a bar or lever is pushed between the two projecting ends of the said arms,
the nut is prevented from revolving, thereby unscrewing the nut & so disengaging the
friction, clutch, or other gear, & stopping the machine.

page_text: I ELLIS WOOD, 140, Jack Lane Hunslet, Leeds, Yorkshire, 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 has reference to means to be employed for automatically and instantly
stopping a machine when any of the working parts get locked fast, and my improve-
ments are particularly well adapted for milling machines employed for milling cloth.
In this class of machine the cloth travels through a grate commonly called the
knocking off board and if the cloth knots or becomes entangled, it will raise the
knocking off board in such manner as to place. a lever into contact with revolving
arms, operating thereby clutches so as to stop the machine before the entangled clothi
enters the nipping rollers.
In order that the clutches and the mode of operating them may be more clearly
understood, reference is made to the accompanying sheet of drawings illustrative
thereof, wherein Fig. 1 is section of the several paris, Fig. 2 front elevation of a
milling machine, and Fig. 3 side view shewing the application of my improved
clutches and the method of working them. A is framing of machine, B the knocking
off board which is divided into compartments for the cloth C to pass through, all
arranged in the usual manner. Dis the driving shaft on which runs loosely the
driving pulley E, the boss of which is grooved and receives a spring clip or friction
strap F. On the end of the shaft D is fixed a friction plate G, which is not in contact
with the face of the driving pulley when the machine is not at work. The shaft is
chased or has a screw thread cut upon it for receiving a nui H, carrying fingers or
forks 1, the said nut is also grooved and receives a spring clip or friction strap J,
which is in contact at point a with the other spring clip F, in such manner that the
clips not only revolve together but they move together latterally on the shaft when
caused to do so as hereinafter explained.
The modus operandi is as follows.
When the machine is at work the friction plate or dise G is in contact with the face
of the driving pulley, but if the cloth C gets entangled and cannot pass through the
openings in the knocking off board, the entangled cloth would lift up the said board,
in doing which the lever K (on the end of the studs which carry the board) will be
brought into contact with the fingers I (see dotted lines Fig. 3) consequently the
rotary motion of the nut would be at once arrested and unscrewed by one or two
revolutions of the shaft which would follow through the momentum it had received.
As soon as the nut H began to unscrew the pulley E would be brought with it by
means of clips F and J, in which case the contact of the pulley with the friction
plate G would be broken and the pulley would cease to drive the shaft, and although

page_text: the shaft would continue to drive the pulley the two clips F and I would slip around
their grooves, until the lever K. was removed from the fingers I, when the friction of
the clips is keen enough to drive the nut H, which is thereby screwed up again
forcing the driving pulley against the friction plate G and so start the machine
again.
By the adoption of this description of friction gear and clutches a fast and loose
pulley is not now required and the wear and tear caused by the straps slipping from
one pulley to another is prevented.
Although I have shewn the friction plate G as on the left hand side of the pulley
the parts may be reversed.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that what I claim is :-
Firstly The use of the spring clip or friction strips F and J, for coupling the
mut H to the driving pulley E, for causing them to move together latterly as set forth.
Secondly-The combination of nut H, spring clips J, F, and pulley E for
stopping the machine automatically as set forth.
TASKER & CROSSLEY,
Halifax, Agents.