An Improved Friction Clutch.
Year: 1890

page_text: Date of Application, 23rd July, 1890
Complete Specification Left, 18th Oct., 1890-Accepted, 22nd Nov., 1830
PROVISIONAL SPECIFICATION.
An Improved Friction Clutch.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of London,
Patent Agent, (a communication to me from abroad by Harry Hill, of Cleveland
Ohio, U.S.A. Gentleman,) do hereby declare the nature of this invention to be as
follows:-
This invention has for its object to provide a friction clutch applicable for use in
connection with pulleys, whereby the said pulleys are converted into fast or loose
pulleys as desired.
By this invention the web or spokes of a pulley is provided with a cylindrical
friction-flange which extends upwards at right angles thereto, a convenient distance
from its centre. A suitable boss having radial arms is secured to the shaft adjacent to
the boss of the pulley. These extending arms are provided at their extremities with
angle-shaped pieces of metal, which are arranged in such manner, that pieces of wood
or other material secured thereto, are rendered capable of bearing upon the upper
surface of the friction flange at the proper time. A similar angle-shaped piece of
metal provided also with a piece of wood, or other suitable material, is slidingly
secured to each radial arm aforesaid in such manner that the said piece of wood is
capable of bearing, at the proper time, upon the inner face of the friction flange.
These two portions are adapted to be closed against the flange by suitable levers
pivoted thereto in such a manner, that when a sliding-sleeve upon the shaft is
reciprocated to or fro, in a horizontal direction, friction is thereby applied to the
flange.
J. P. BAYLY,
Applicant.
COMPLETE SPECIFICATION.
An Improved Friction Clutch.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of London,
Patent Agent, do hereby declare the nature of this invention (a communication to
me from abroad by Harry Hill, of Cleveland, Ohio, U.S.A. Gentleman), to be as
follows:-
This invention relates to certain new and useful improvements in friction-clutches,
of which the following is a full, clear, and exact description, reference being had to
the accompanying drawings, in which-
Figure 1 is a central longitudinal sectional view of one embodiment of my improved
clutch.
Fig. 2 is a top view of one of the clutch-arms and the clutch mechanism connected
therewith.
Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 1, and
Fig. 4 is a view showing the inner end of the arms H' and a modified connection
between them and the sliding sleeve.
My invention relates to that class of devices which are known as " friction
clutches"; and it is designed particularly as an improvement upon that class of
friction-clutches in which a pair of clutch members are mounted upon a clutch-arm
and are simultaneously moved in radial paths toward and from an interposed
cylindrical flange for the purpose of grasping and releasing the same.
The object of my invention is to provide novel and improved mechanism for
imparting to the clutch members their simultaneous inverse movement.
To this end it consists in the combination of parts herein described and shown, and
pointed out definitely in the claims.
DQ27

page_text: Referring to the parts by letters, A represents a shaft
B represents an independently-revoluble pulley mounted concentric with said shaft,
and provided with a concentric cylindric flange b.
C represents a clutch-frame rigidly secured to the shaft by a key a or other
appropriate means. This clutch-frame is.provided with as many radial arms c as it is
desired to employ clutch systems-that is to say, pairs of jaws and their operating
mechanism.
D represents the outer and D₁ the inner clutch member. These clutch members
are of a well-known type, and consist of an inwardly-directed shank d and an over-
banging jaw. The shanks d are mounted upon opposite sides of the clutch-arm, and
are prevented from being displaced laterally by the side flanges c', and are held
against the clutch-arm by plates E and F, which are bolted to said flanges c'. A
lever G passes through a slot in the clutch-arm and is pivoted to said clutch-arm by
the pivot g. On opposite sides of this pivot the lever is also pivotally connected with
the two jaw-shanks by the pivots g g'. This lever G is rocked upon its pivot,
and the jaws thereby simultaneously moved toward or from each other and the
interposed cylindric flange b by a toggle H. The outer link of this toggle is pivoted
to some part of the clutch-arm, and a lower link is pivoted to an extension of the
lever G. An arm H¹ rigidly connected with the toggle-link h, extends inward
toward the shaft. Its inner end is suitably connected to a sleeve J, slidable upon
the shaft, whereby the toggle is straightened and the jaws closed as the sleeve is
moved in one direction or bent, and the jaws thereby opened when the sleeve is moved
in the opposite direction. When the central toggle-pivot passes the line connecting
the two other toggle-pivots, the clutch is locked and can only be unlocked by the
.backward movement of the sliding-sleeve.
The drawings represent two forms of connecting the arm H' with the sleeve.
Fig. 1 shows this connection in the form of a link pivotally connected with the sleeve
and arm.
In Fig. 4 a pin on ears j; on the sleeve passes through a slot in the
arm H. I am thus able, if I desire, to get the entire clutch mechanism, including
the sleeve, upon a very small part of the shaft by employing the latter construction ;
or the sleeve may be removed to any desired distance from the clutch mechanism by
using a link of suitable length..
In clutches of this class the jaws are generally faced with wood, and by reason of
the wearing away of the wood faces it is necessary, in a practical clutch, to provide
means for adjusting the mechanism to compensate for this wear. The means I have
provided are as follows:
e represents a lug on the outside of the clutch-arm, or specifically, as shown, a part
of the plate E. This lug is provided with a socket e¹, which receives the shank k of
the piece K. This piece K is provided with an ear or ears, to which is pivoted the
upper end of the toggle-link h. A set-screw M enters the lug e and bears against
the end of the shank k, whereby the piece K may be moved inward toward the shaft
as the jaws wear. In the form shown the lug e is split and provided with ears e²,
and by means of a bolt or screw e³, which passes through them, the shank k may he
clamped sufficiently tight to prevent its slipping outward when the toggle is
operated, but which will permit the screw M to crowd it outward for the purpose of
adjustment.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1. In a friction-clutch, in combination, a cylindric flange, a clutch-arm, a pair of
clutch members mounted thereon, a lever pivotally connected to said arm and on
opposite sides of that pivot to the clutch members, respectively, a toggle the links of
which are pivotally connected one to the clutch-arm and one to an extension of the
said lever, and mechanism for operating said toggle, substantially as and for the
purpose specified.
2. In a friction-clutch, in combination, a cylindric flange, a clutch-arm; a pair of

page_text: clutch members mounted thereon, a lever pivotally connected to said arm and on
opposite sides of that pivot to the clutch members, respectively, a toggle, a pivot
connecting the outer toggle-link with the clutch-arm, a pivot connecting the inner
toggle-link with said lever, an arm rigidly attached to the outer toggle-link, a slidable
sleeve, and suitable connections between said arm and sleeve, substantially as and for
the purpose specified.
3. In a friction-clutch, in combination, a cylindric flange, a clutch-arm, a pair of
clutch members mounted thereon, a lever pivoted to said arm and on opposite sides
of said pivot with the clutch members, respectively, a toggle, a pivot connecting
the inner toggle-link with said lever, a pivot connecting the outer toggle-link with
the clutch-arm, mechanism for adjusting the position of this last-named pivot,
and mechanism for operating said toggle, substantially as and for the purpose
specified.
4. In a friction-clutch, in combination, a cylindric flange, a clutch-arm, a pair of
clutch members mounted thereon, a lever pivoted to said clutch-arm and on opposite
sides of this pivot with the clutch members, respectively, a lug attached to the
clutch-arm and provided with a socket, a piece K, having a shank which enters
said socket, mechanism for holding it therein, a set-screw which screws into the
outer end of said lug and bears against said shank, a toggle, a pivot connecting
the inner toggle-link with said lever, a pivot connecting the outer toggle-link with
the piece K, an arm rigidly secured to the outer toggle-link, a slidable-sleeve, and
suitable connections between said arm and sleeve, substantially as and for the.
purpose specified.