An Improved Clutch.
Year: 1892

page_text: Date of Application, 10th Aug., 1892-Accepted, 3rd Dec., 1892
COMPLETE SIDUITIVATION.
An Improved Clutch.
I, JOHN SPENCER ADAMS, of 105 Thaila Street, New Orleans, in the County
of Orleans, and State of Louisiana, United States of America, Draughtsman,
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 :-
The invention relates to combined friction and positive clutch pulleys and clutch
couplings.
The object of the invention is to provide a new and improved clutch which is
simple and durable in construction and arranged in such a manner as to permit of
gradually applying the friction lock, and when the speed of the driving and driven
parts is nearly equal the friction lock is broken and the positive lock is actuated to
connect the two parts, so as to make a direct or positive coupling.
The invention consists of two sliding blocks connected with a lever under the
control of the operator.
The invention also consists of certain parts and details and combinations of
the same, as will be fully described hereinafter, and then pointed out in the
claims.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the views.
Figure 1 is a face view of the improvement.
Fig. 2 is an enlarged rear face view of part of the same.
Fig. 3 is an enlarged sectional side elevation of the improvement.
Fig. 4 is a like view of part of the same in a different position.
Fig. 5 is a sectional plan view of the same on the line 5 5 of Fig. 4, and
Fig. 6 is a sectional side elevation of a modified form of the improvement as
arranged for a clutch coupling.
On the driving shaft A is mounted to turn loosely the pulley B to be driven, the
said pulley being provided with a friction rim B¹, formed at the inside, and either
at its inner or outer edge with teeth or projections B. On the driving shaft A is
keyed or otherwise secured a hub C, provided with one or a series of radial arms D,
each having an aperture D', through which extends a lever E, pivoted in the arm
at E' and connected at its outer end by a link F with an arm G¹ of the sleeve G,
mounted to slide loosely on the shaft and connected with the usual shifting rod for
moving the said sleeve to connect or disconnect the driving and driven parts. The
inner end of the lever E carries a link H, engaged by one end of a screw rod I,
having a right and left hand thread, of which one engages the said link and the
other engages a short shaft J, mounted to turn in bearings formed in the lugs K',
projecting from the rear end of a sliding block K, fitted to slide radially in suitable
bearings D², formed in the respective arm D. On the outer end of the sliding
block K is formed a head K², supporting a brake shoe L, adapted to engage that
part of the inner surface of the rim B' having no clutch teeth B. The front end
of the lever E is also pivotally connected by a link N with a second sliding block O,
mounted to slide radially in suitable bearings D', formed on the respective arm D,
on the front face of same, directly opposite the other sliding block K. The outer
end of the sliding block O is provided with a rib or lug O, adapted to move close
to the inner surface of the rim B₁ between the two succeeding teeth B', so as to
engage one of the same, according to the direction in which the shaft is revolved.
It will be seen that when the lever E is actuated one of the blocks K or O will
move outward while the other moves inward, and vice versa. By turning the screw

page_text: rod the block K can be readily adjusted so as to bring the brake shoe L in the
proper position with relation to the inner surface of the rim B' for engagement
with the same. When the sleeve Gabuts against the hub C, as illustrated in
Fig. 3 the two sliding blocks K and O are in such a position that the shoes L of
the sliding blocks K are disengaged from the rim B' and the lugs O¹ of the blocks O
are out of engagement and below the inner surface of the teeth B. Now when it
is desired to connect the driving part with the driven part the operator moves the
shifting lever, so as to cause the sleeve G to slide in the direction of the arrow a¹
into the position shown in Fig. 4, whereby the link F is drawn into a vertical
position and the rear end of the lever E is caused to move outward, thus moving
the sliding block K in a like direction to engage the brake shoe L with the inner
surface of the rim B¹, thus connecting the pulley B with the shaft A. The other
sliding block O is moved inward and is entirely out of engagement with the
teeth B². As soon as the pulley B attains about the same speed as the driving
shaft A, then the operator shifts the sleeve G still farther to the right in the
direction of the arrow a¹ until the said sleeve reaches the position shown in dotted
lines in Fig. 4. By this farther movement of the sleeve G the link F pulls on the
levers E, so that the front ends of the levers swing outward and the rear ends swing
inward thus simultaneously shifting the blocks K and O in opposite directions,
whereby the shoe L of the block K is moved out of frictional contact with the
rim B' and the other block O is moved outward to pass with its lugs O' between
two succeeding teeth B2 ou the rim B. The said lugs O¹ of the several blocks
each engage either of the teeth B2, according to the direction in which the shaft
is revolved, thus making a positive connection between the pulley B and the
'shaft A.
When the operator desires to disengage the driving from the driven parts, he
shifts the sleeve G in the inverse direction of the arrow a¹, so as to move the
block O out of contact with the teeth B' and the brake shoe L in contact with the
rim B' to finally move the said brake-shoes out of frictional contact with the rim
at the time the inner face of the sleeve G abuts against the hub C. (See Fig. 3.)
If it is desired to couple two shafts A and A', a similar arrangement is made, the
pulley B then being keyed on the shaft A¹. As shown in Fig. 6, the position of
the blocks K and O is reversed-that is, the block O is arranged on the inside of
the arm D, while the block K, carrying the brake shoe L, is on the outside of the
same. The link H is dispensed with and the screw rod I engages a second short
shaft J¹, held in the lever E. The sleeve G is held in an outermost position
against a stop collar P, secured on the shaft A. When in this position, the two
sliding blocks K and O are disengaged from the rim B' and teeth B*, and when
the sleeve is moved into an intermediate position between the collar P and the hub C
then the friction clutch is applied, and in a farther inward movement the friction
clutch is disconnected and the positive clutch engages the pulley in the manner
above described. The sleeve G then rests on the hub C. Thus it will be seen
that when the sleeve is shifted into an intermediate position a friction lock is
established between the driving and driven parts, so as to gradually impart the
speed of the driving part to the part to be driven. When the speeds of the
driving and driven parts are equal, or nearly so, the positive clutch is brought into
play to positively connect the driving parts with the driven.
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 :-
1. In a clutch, the combination, with two sliding blocks and a sliding sleeve, of
a lever mechanism connected to said blocks and sleeve for alternately operating
the blocks by a continuous movement of the said sleeve, substantially as described.
2. In a clutch, the combination, with two sliding blocks and a sliding sleeve, of
a lever pivoted a short distance from one end, connected on opposite sides of its
pivot with the sliding blocks, and having one end pivotally connected to the sleeve

page_text: and alternately operating the blocks by a continuous movement of the said sleeve,
substantially as described.
3. In a clutch, the combination, with two sliding blocks and a sliding sleeve, of
a lever pivoted a short distance from one end, links connected to the lever on
opposite sides of its pivot and to the blocks and a link pivoted to one end of the
lever and to the sleeve, whereby the blocks will be alternately operated by a
continuous movement of the sleeve, substantially as described.
4. In a clutch, the combination, with a pulley having teeth on one portion of
its rim and a sliding sleeve, of two sliding brake blocks, one of which is provided
with teeth, a pivoted lever having its longer arm pivotally connected to the sleeve,
and links connecting the lever with the blocks, substantially as described.
5. In a clutch, the combination, with a hub and a sliding sleeve, of sliding blocks
carried by the said hub, a pivoted lever, links connecting the lever with the blocks,
one of the said links being adjustable, and a link pivoted to the lever and to the
sleeve, substantially as described.
6. In a device of the class described, the combination with a pulley having teeth
on one portion of its rim and a hub provided with arms having guideways, of a
lever pivoted on each of the said arms, blocks fitted to slide in the said guideways,
one of the blocks being provided with teeth, links connecting the said blocks with
the said lever at opposite sides of its fulcrum, and a brake shoe held on one of the
said blocks and adapted to engage the rim of the pulleys to be driven, substantially
as described.
7. In a device of the class described, the combination, with a hub provided with
arms having guideways, of a lever pivoted on each of the said arms, blocks fitted
to slide in the said guideways, links connecting the said blocks with the said lever
at opposite sides of its fulcrip, a brake shoe held on one of the said blocks and
adapted to engage the rim of the pulley to be driven, the other block being
provided with a tooth for engaging a tooth on the rim of the said pulley, substan-
tially as shown and described.
8. In a device of the class described the combination with a hub provided with
arms having guideways of a lever pivoted on each of the said arms, blocks fitted
to slide in the said guideways, links connecting the said blocks with the said lever
at opposite sides of its fulcrum, a brake shoe held on one of the said blocks and
adapted to engage the rim of the pulley to be driven, the other block being
provided with a tooth for engaging a tooth on the rim of the said pulley, a sleeve
mounted to slide and provided with arms, and links connecting the said arms with
the said levers, substantially as shown and described.
Dated this 10th day of August 1892.
F. W. BARKER,
Applicant's Agent.