Improvements in Clutch Pulleys.
Year: 1894

page_text: Date of Application, 28th, Sept. 1894-Accepted, 10th Nov., 1894,
LUMILIN SEMITIGATION.
Improvements in Clutch Pulleys.
1, WALTER PECK CHAPMAN, residing in, Hamilton in the County of Wentworth
in the Province of Ontario, Civil Engineer, do hereby declare the nature of my
said 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 certain new and useful improvements in clutch pulleys,
and the object of the invention is to provide the clutch pulley with one clutch
member comprised of a disc or plate having a series of outwardly extending springs
substantially parallel with the hub of the same, and providing the other clutch
member with a seat for each of the said springs, into each of which one of the said.
springs is adapted to enter 'to lock together the said clutch members and to provide
the clutch members with a plunger adapted to expand the springs into the said
seats to cause the interlocking of the said clutch members, the whole device being
constructed as hereinafter set forth and more particularly pointed out in the.
claims.
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In the drawings:
Fig. 1 is a perspective view of the complete dovice.
Fig. 2 is a view showing the clutch pulley and clutch members in section.
Fig. 3 is a perspective view of one of the clutch members.
Fig. 4 is a perspective view of the other clutch member in section.
Fig. 5 is a perspective view of the plunger.
Fig. 6 is an end elevation of a portion of the clutch member shown in Fig. 3. to.
illustrate the key locking the said clutch members to the shaft.
Fig. 7 is a perspective view of a section of the hub of the clutch member shown
in Fig. 3 to illustrate the means for locking the key to the clutch member...
Fig. 8 is a perspective view of the key.
Like letters of reference refer to like parts throughout the Specification. and
drawings.
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In the drawings A refers to the shaft, and B refers to a fast pulley mounted upon
the shaft by means of which motion is transmitted to the shaft. Loosely mounted
upon the shaft A is the clutch pulley C consisting of a hub D-fitted loosely to the.
shaft A, a drum-shaped clutch member E surrounding the hub D and connected
thereto at one end by a plate F, and a rim G connected to the clutch member E
by means of spokes or arms H. Mounted fast upon the shaft A is a disc i having
a series of outwardly extending flat springs J. riveted or bolted thereto and adapted
to enter within the clutch member E. Formed in the clutch member E are a series of
seats K equal in number to the number of flat springs J, and arranged to receive the
same. Mounted loosely and sliding on the hub D'is a plunger which consists in this.
case of a plunger head L connected by two rods or arms M to a slide-head N loosely,
mounted upon the shaft A and clear of the clutch pulley C. The plunger head I.
is of a sufficient size to expand the springs J into the seats K. when the said plunger.
head is slidden upon the hub D, in order that the said springs will interlock with
the seats K and cause the clutch 'member E to revolve with the clutch member..I
and shaft A. The arms or rods M pass through openings in the plate F, and it
might here be stated that the plunger head L, rods or arms M, and the slide head: N
revolve with the clutch pulley C whilst the clutch 'members are interlocked The
hub, O of the disc is provided with a key-seat-P adapted to receive the key Q
looking the disc i to the shaft A: The key Q, it will be noticed, consists of a a piece
of curved metal having a lug g adapted to enter a recess or groove a in the shaft A,
and it will be noticed by reference to the drawings that the key seat P.is so,
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page_text: constructed that it will admit of the entrance of the key into the hub O, and that
when entered therein the key will turn into the seat P and be held therein, in such
a manner that the clutch member and shaft during their revolution will not separate
nor the clutch member be permitted to elide on the shaft A. ie. the key is placed
on the shaft & the boss slid over it & partially turned so as to wedge the cresent
part of the key into the recess shewn in Fig. 7. The slide-head N is provided with
a circumferential groove R and is encircled by a ring S having lugs adapted to
enter the groove R and lock together the ring and the slide head. The ring S is
connected to a hauger T pivotally connected to the timbers or rafters of the frame
supporting the shaft, and is also connected to a lever U, by means of which the
slide-head is slidden upon the shaft A. The sliding movement of the slide-head N
either draws respectively the plunger head L into or out of contact with the flat
springs J, and either causes the springs J to interlock with the seats K, or releases
the springs J from the seats K. The hub D is provided with an oil cup V, and an
opening through the hub to the bore by means of which the oil is fed from the
said oil cup to the bore. The shaft A, it will be noticed by reference to Fig. 2 of
the drawings, is provided with a series of concentric grooves W to retain the oil
within the bore of the hub D, and prevent the oil from leaking out at the ends of
the hub. I find it desirable to form through the hub D a series of small openings X,
by means of which a small quantity of the oil within the bore of the hub can find
its passage through the said hub to lubricate the springs J and the outer face of the
hub, to admit of the plunger head L sliding freely upon the said hub and against
the springs J.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I hereby declare that
what I claim is :
1. In a friction clutch the combination of a clutch disc, a series of outwardly
extending springs attached thereto, and substantially parallel with the axis thereof,
with a drum shaped clutch member provided with a seat for each of said springs, a
plunger adapted to expand the springs into said seats, and means for moving the
said plunger, substantially as specified.
2. In a clutch pulley the combination of a clutch disc, a series of outwardly
extending springs attached thereto, and substantially parallel with the axis thereof,
the hub having a key seat constructed to lock the key therein, the shaft having a
recess formed therein, the key provided with a lug adapted to enter the recess in
the shaft to lock the disc to the shalt a clutch pulley having a hub loosely mounted
on the shaft, a drum shaped clutch member surrounding the said hub and connected
thereto by a plate, said clutch member having a seat for each of the springs on the
disc, a plunger loosely nounted and slidable on said hub and adapted to force
the springs into the said seats, and means for moving the plunger into or out of
engagement with the said springs, substantially as specified.
3. In a clutch pulley the combination of a clutch disc, a series of outwardly
extending springs attached thereto.and substantially parallel with the axis thereof,
the hub having a key seat constructed to lock the key therein; the shalt having a
recess formed therein, the key provided with a lug adapted to enter the recess in
the shaft to lock said disc to the shaft, a clutch pulley having a hub loosely mounted
on the shaft, a drum shaped clutch meinber surrounding said hub and connected
thereto by a plate, said clutch member having a seat for each of the springs on the
said disc, a plunger loosely mounted and slidable on said hub and adapted to force
the spring into the said seats, a slide head loosely mounted, upon the said shaft and
clear of the clutch pulley, rods connecting the plunger with the slide head, and
means for slidably moving the slide head on the shaft to move the plunger into or
out of engagement with the said springs, substantially as specified.
4. In a friction clutch the combination of a clutch disc, a series of outwardly
extending springs attached thereto and substantially parallel with the axis thereof,
the hub having a key ecat constructed to lock the key therein, the shaft having a

page_text: recess formed therein, the key provided with a lug adapted to enter the recess in
the shaft to lock said disc to the shaft, a clutch pulley having a hub and loosely.
mounted on the shaft, a drum shaped clutch member surrounding said hub and
connected thereto by a plate, said clutch member having a seat for each of the
springs on the disc, a plunger loosely mounted and slidable on said hub and adapted
to force the springs into said seats, a slide-head loosely mounted upon said shaft and
clear of the clutch pulley, said slide-head having a circumferential groove formed
therein, a ring encircling the slide-head and having lugs adapted to enter the groove
a.hanger connected to said ring and pivotally conncoted to a framework, and a
lever connected to said ring by means of which the slide-head is slidden on the
shaft, substantially as specified.
Dated this 97th day of Contamha. 1901
•
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.