Year: 1897

page_text: We, ALFRED POCHIN, trading as The Standard Engineering Co of Welford Road,
Leicester, Makers of Boot & Shoe Machinery, FRANK HOWARD POCHIN, Draughtsman
and HENRY ADDISON, Manager both of the same address do hereby declare the nature of
this invention to be as follows:-
This invention has reference to clutches and relates more particularly to improved
means or mechanism for placing the same in and out of action as required.
The invention is designed chiefly, though not exclusively, for use in connection
with embossing machines, stamping presses, guillotine or ranging machines, heeling
machines, revolution or sole cutting presses and machines of analogous construction
and operation viz: having a vertically reciprocating head which it is desirable to bring
to a stanstill at the end of each stroke or up and down movement and when the said
head is in its raised or higest position.
It is obvious however that the invention may be applied to other machines than
those named.
We will first describe our invention in connection with the type of clutch which
comprises a belt driven pulley loose on the driving shaft, and having on one side a
stepped plate or flange adapted to engage with a spring pawl or dog keyed fast on the
driving shaft and thereby revolve the shaft and set the machine in motion.
The mechanism constituting the present invention and when applied to the type
of clutch named has for its object to disengage the said pawl from the clutch at each
revolution and thus bring the machine to rest.
For this purpose we may employ a spring controlled disengaging lever which,
when in one position intercepts the pawl or dog and draws it out of engagement with
the clutch or stepped flange and which when in the other position allows the said
pawl and clutch to become engaged.
This disengaging lever may be spring controlled or counterweighted to maintain it
in position for being actuated for the purpose described by another lever or a rod,
slide or equivalent means at right angles thereto.
On the end of either the one or the other of these two right angled levers or the
rod, slide or equivalent may be a spring controlled or counterweighted foot or
end which when it receives movement in one direction will actuate the disengaging
lever, but which returning to its original position will do so without the said lever
being influenced thereby and allow the clutch to make a complete revolution before
being thrown out of gear.
In some types of machines a roller placed on the side of the usual treadle
lever (which latter would then take the place of the second lever) will effect the
same purpose.
The invention is also applicable to other types of clutches than that named, the
disengaging lever in such cases being suitably attached to the movable part of the
clutch so as to move it to and fro relatively to the part of the clutch fast on the driving
shaft.

page_text: It is obvious that if the operator keeps the lever depressed or the rod or slide moved
forward, by his foot or otherwise, the clutch will revolve continuously until the
operator's foot be removed.
The invention will vary somewhat in detail according to the kind of machine
to which it is applied.
We, ALFRED POCHIN, trading as The Standard Engineering Co of Welford Road,
Leicester, Makers of Boot and Shoe Machinery, FRANK HOWARD POCHIN, Draughtsman
and HENRY ADDISON, Manager both of the same address 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 has reference to clutches and relates more particularly to improved
means or mechanism for placing the same in and out of action as required.
The invention is designed chiefly, though not exclusively, for use in connection
with embossing machines, stamping presses, guillotine or ranging machines, boot
heeling machines, revolution or sole cutting presses and machines of analogous
construction and operation viz: having a vertically reciprocating head which it is
desirable to bring to a standstill after each revolution of the driving shaft and at the
end of each stroke or up and down movement, when the said head is in its raised or
highest position.
.
f
It is obvious however that the invention may be applied to other machines than
those named, and in which it is desirable to allow the driving shaft to make one
revolution and then stop.
We will first describe our invention in connection with the type of clutch which
comprises a belt driven pulley loose on the driving shaft, and having on one side a
stepped plate or flange adapted to engage with a spring pawl or dog keyed fast on the
driving shaft and thereby revolve the shaft and set the machine in motion.
The mechanism constituting the present invention and when applied to the type of
clutch named has for its object to disengage the said pawl from the clutch at each
revolution and thus bring the machine to rest.
For this purpose we may employ a spring controlled disengaging lever which, when
in one position intercepts the pawl or dog and draws it out of engagement with the
clutch or stepped flange and which when in the other position allows the said pawl
and clutch to become engaged.
This disengaging lever may be spring controlled or counterweighted to maintain
it in position for being actuated for the purpose described by another lever or a rod,
slide or equivalent means.
On the end of either the one or the other of these two levers or the rod, slide or
equivalent may be a spring controlled or counterweighted foot or end which when it
receives movement in one direction will actuate the disengaging lever, but which
returning to its original position will do so without the said lever being influenced
thereby and allow the clutch to make a complete revolution before being thrown
out of gear.
In some types of machines a roller placed on the side of the usual treadle
lever (which latter would then take the place of the second lever) will effect the
ame purpose.

page_text: псыпса
The invention is also applicable to other types of clutches than what
sengaging lever in such cases being suitably attached to the movable part of
e clutch so as to move it to and fro relatively to the part of the clutch fast on the
riving shaft.
It is obvious that if the operator keeps the lever depressed or the rod or slide
oved forward, by his foot or otherwise, the clutch will revolve continuously until
he operator's foot be removed.
9
The invention will vary somewhat in detail according to the kind of machine to
which it is applied.
Referring to the accompanying drawings Figure 1 is a plan and Figure 2 a side
levation of a clutch and the mechanism for placing it in and out of action
constructed in accordance with one form of this invention, and Figures 3 and 4 are
letail views of the clutch lever and the pivotted or movable piece J, the latter being
shown in different positions.
Figure 5 is a front elevation of a modification and Figure 6 a side elevation of the
lever F, pivotted or movable piece J, and actuating roller N shown in the last named
figure but drawn to a larger scale.
Referring to Figures 1 to 4, A represents the driving shaft of any of the types of
machines herein before referred to which it is requisite to bring to a standstill after-
each complete revolution.
B is a belt driven pulley loosely mounted on the said shaft and C is a stepped
clutch or ring attached to or formed as an integral part of the pulley and at the side
thereof.
D is a sleeve keyed or otherwise made fast on the driving shaft. The said sleeve
is provided with a downward extension D¹ and is embraced by the bifurcated end of a
dog or catch E which by means of the pin E¹ is movably fitted thereon as shown
most clearly in Figure 2.
A spring E2, Figure 1, located in a recess D² in the sleeve D and exerting its force
against the dog Ĕ maintains the latter pressing against the side of the stepped
clutch C.
When one of the projections or stepped faces C¹ of the clutch collides with and
engages the dog E the shaft is revolved.
FF is a two armed disengaging lever the central tubular part F2 of which is
passed over a spindle G projecting from any convenient fixed part of the machine or
its framing.
The arm F¹ extends rearwards and has connected on its end at a right angle
thereto a spindle or antifriction roller H and in contact therewith is a movable foot
or toepiece J hereinafter referred to.
The arm F is by means of a spring F³ maintained pressing against the periphery
0 of the stepped ring C and when the driving shaft has made a complete revolution the
near edge of the dog collides with the adjacent edge F4 of the arm F and moving
in contact therewith, becomes guided or drawn away from the projection and its
inotion and that of the driving shaft arrested immediately upon the dog reaching
the shoulder F5.
15
When in this position the dog is compressing the spring E2 with the cavity D2 in
the sleeve D and immediately the arm F is raised, the dog is at once pressed against
the edge of the clutch and is engaged by the next projection C¹ and again revolves the
driving shaft as before described.
The foot J by which the arm F is raised is in contact with the roller H on the othe
50 arm.
This foot is pivotted at J¹ in a groove in the underside of a block K bored to pas
over a slide rod L on which it is adjustably fixed by a set-screw K¹.
This slide rod is carried in fixed bearings L' L2 which in the present case ris
upwards from a bed plate M, a slot or aperture M¹ therein being provided to allow th
55 block K to pass through.
The slide rod is encircled by a spiral spring L³ abutting one end against th
bearing. L² and the other end against the end of the block K and on the opposit

page_text: end is a shaped plate LA against which, in a sole stamping machine, one end of a
sole or other article to be stamped may be pressed with sufficient force to move the
slide rod in its bearings to start the machine.
In some machines the shaped plate may be regarded as for the knee of the operator
to be pressed against to set the machine in motion.
When by pressure against the shaped plate from either the knee of an individual
or of a sole or other article to be stamped the slide rod is moved inwards so as to
compress the spring L³, the arc shaped face of the pivotted foot J as shown in
Figs 2 and 4 presses unyieldingly against the arm H and lowers the latter which
thereby raises the other arm F from against the clutch, the dog E thereupon moves
against the side thereof, as already described, in readiness to be engaged by the first
projection C which comes in its path, to revolve the driving shaft.
Immediately pressure is removed from the shaped plate by the withdrawal of the
operator's knee or the article to be stamped, the spiral spring L³, now in compression,
exerts its force and returns the slide rod to its normal position and the pivotted
foot now yields to and rides over the arm H without moving it as illustrated in
Figure 3.
The foot J as shown in Figures 2 and 3 is constructed so that its own weight
-maintains it in an operative position and the pressure of its tail against the top of
the groove in the block K makes it sufficiently rigid to overcome the resistance of
the roller or arm H when the slide rod is moved forward, the result of which is
that the arm H is lowered as herein before described.
In a modification as shown in Figure 4 a spiral spring J is fitted under the tail of
the foot and thereby renders the action of the latter positive.
In some cases the roller on the side of the arm H may be a very short one and if
necessary as is obvious the foot could be arranged to act upon the end of the arm
itself.
In Figures 5 and 6 our invention is shown as applied to a machine with a
reciprocating head as herein before mentioned, which is put in action by depressing a
treadle, as is well understood.
In these Figures A represents the driving shaft, B the belt driven pulley, C the
clutch, E the dog, E2 its controlling spring, and D the sleeve on the driving shaft
all of which may be constructed and operate as described in reference to Figures 1
and 2.
F is the clutch disengaging lever which is maintained against the clutch by a
spring F3 and is also furnished with a tubular end F2 fixed by a set screw Fo
on a spindle G which stretches between the two standards or framing of the
machine.
Part of the side of the lever is cut away at F7 and located therein is the piece J
capable of moving on a pivot J' centred on a projection F8 from the lever F.
The tail of this projection is elevated by a spring J2 connected one end thereto
and the other end to the lever F.
The opposite end of the said piece is thereby projected in the path of a roller N
which is normally in contact therewith.
The roller is carried on a spindle N' projecting from the upper end of a
vertical arm 01 fixed to the usual foot treadle O by which the machine is set in
Inotion.
When the treadle is lowered by the operator's foot, the roller N presses against the
piece J.and the lower edge of the latter not being able to pass the shoulder F of the
lever F moves the latter on its centre G and away from the clutch C so that the dog E
may engage the latter to revolve the driving shaft A as already described.
Immediately the lever moves away as described the roller Ñ gets in front of the
curved face J of the piece J and upon the operator removing his foot from the
treadle, the latter rises under the influence of the ordinary spring connected thereto,
but not shown in the drawings, and the roller causes the piece J to move on its pivot
as indicated by the dotted line in Figure 6 so as to pass it and return to its normal
position in readiness to repeat the operation when next the treadle is lowered.

page_text: It is obvious that the positions of the roller N and the piece may
hat is to say, the roller N may be mounted on the lever F and the piece J on the
ide of the treadle arm 01 with the same results.
°
Having now particularly described and ascertained the nature of our said
nvention and in what manner the same is to be performed we declare that what we
claim is:-
1. The combination with a driving shaft of a two part clutch, one part revolving
loose on the said shaft and the other part being fast thereon, a lever to move one of
the said two parts into and out of engagement with the other and a pivotted or
movable piece such as J operating substantially as and for the purpose described.
2. The combination with a driving shaft of a belt driven pulley and stepped pulley
loose thereon, a spring controlled dog or catch for same fast on the said shaft, a
disengaging lever for the said dog and a movable piece such as J or its equivalent
which when pressed against the said lever in one direction will withdraw the latter
from the said dog and when moved against the lever in the opposite direction will
not actuate it substantially as and for the purpose described.
3. The combination with a driving shaft of a belt driven pulley and a clutch
revolving loose on the said shaft, a dog or catch for the said clutch fast on the said
shaft, a disengaging lever for the said dog or catch, a slide, arm or lever having a
spring controlled or counterweighted toe piece movably pivotted thereto and adapted
when moved against the disengaging lever in one direction to withdraw the latter
from its operative position and when moved against the said lever in the other
direction, to travel past it without actuating it substantially as and for the purpose
described.
4. The combination and arrangement of parts, substantially as described with
reference to Figures 1, 2, 3, and 4 of the accompanying drawings.
5. The combination and arrangement of parts substantially as described and with
reference to Figures 5 and 6 of the accompanying drawings.
ALFRED POCHIN.
HENRY ADDISON.
Boult & Wade
Agents for the Applicants.
Dated this 16th day of October
Witness:--
E. N. LEWIS,
Berridge Street Chambers, Leicester.
ALFRED POCHIN.
HENRY ADDISON.
Boult & Wade
Agents for the Applicants.