An Improvement in Friction Clutch Pullies.
Year: 1887

page_text: Date of Application, 12th Feb., 1887
Complete Left, 3rd Nov., 1887
Complete Accepted, 6th Dec., 1887
An Improvement in Friction Clutch Pullies.
I, WILLIAM MATHER, of the Firm of Mather and Platt of Salford in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows
-
This invention relates to means of coupling by a friction clutch a pulley to a driving
shaft, on which it is mounted free to turn, or of uncoupling it therefrom. The pulley
is made with an elongated boss or sleeve, which may be bushed with antifriction
material to turn freely on the shaft which passes through it. On the exterior of this
sleeve is fitted a collar grooved to be engaged by a forked lever by which it can be
slid to or fro. Two ears upon this collar are linked to two lever arms fixed respectively
on two right and left threaded screws which are turned in the one or the other direction
according as the collar is slid along the sleeve towards or away from the pulley.
These two screws are engaged with flanges of two half rings which embrace a
cylindrical boss fixed on the driving shaft. By sliding the collar in the one direction,
the screws are turned so as to draw the two half rings together causing them to
clamp the boss, and in that case the pulley is driven by their frictional hold on the
boss by sliding the collar in the opposite direction the boss is unclamped and the
shaft revolves without driving the pulley, which, with the clamping apparatus,
remain stationary. The cylindrical boss instead of being fixed on the shaft may
be fitted with a feather so as to be capable of being slid along the shaft away from
the pulley and its clamping rings.
Dalth: 19th da.. o
1007
ABEL & IMRAY,
Agents for the Applicant.

page_text: An Improvement in Friction Clutch Pullies.
I, WILLIAM MATHER, of the firm of Mather and Platt, of Salford, 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 :-
This invention relates to means of coupling by a friction clutch a pulley to a
driving shaft on which it is mounted free to turn, or of uncoupling it therefrom, as
I will describe referring to the accompanying drawing which is a longitudinal
section of a coupling according to this invention.
The pulley B is made with an elongated boss or sleeve which may be bushed
with antifriction material to turn freely on the shaft. A which passes through it.
On the exterior of this sleeve is fitted a collar F grooved to be engaged by a
forked lever by which it can be slid to or fro. Two ears upon this collar are
connected by adjustable links d to two lever arms c fixed respectively on two right
and left threaded screws b which are turned in the one or the other direction accord-
ing as the collar F is slid along the sleeve towards or away from the pulley B.
These two screws bare engaged with flanges a of two half rings E which embrace a
cylindrical boss D fixed on the driving shaft A. The half rings E are held to the
face of the boss of the pulley B by bolts or screws situated in a diameter at right
angles to that of the division of the half rings, and these bolts or screws pass through
holes radially slotted so that they operate as drivers while they allow the half rings to
be moved a little towards or away from the boss D.
By sliding the colar F in the one direction the screws bare turned so as to draw
the two half rings E together causing them to clamp the boss D, and in that case the
pulley is driven by their frictional hold on the boss; by sliding the collar F in the
opposite direction, the boss D is unclamped and the shaft A revolves without driving
the pulley B, which, with the clamping apparatus, remains stationary. The boss D,
instead of being fixed on the shaft, may be fitted with a feather so as to be capable of
being slid along the shaft away from the pulley and its clamping rings.
Having now particularly described and ascertained the nature of this invention, and
in what manner the same is to be performed, I declare that what I claim is :-
The construction and use of a friction clutch pulley, wherein a sleeve fitted to slide
along the boss of the pulley is linked to arms on screws that, according as the sleeve is
slid to or fro, tighten or loosen two half rings attached to the pulley so as to clamp or
unclamp a boss revolving with a driving shaft which passes free through the boss of
the pulley, substantially as described.
T: 01 1
1007
ABEL & IMRAY,
Agents for the Applicant.