IMPROVEMENTS IN ECCENTRIC WHEELS AND IN APPLIANCES CONNECTED THEREWITH
Year: 1884

page_text: I MATTHEW HESLOP of No 11 Palmerston Buildings in the city of London,
Consulting Mining Engineer, do hereby declare the nature of my Invention for
IMPROVEMENTS IN ECCENTRIC WHEELS AND IN APPLIANCES CONNECTED THEREWITH
to be as follows:---
My Invention relates to improvements in Eccentric wheels with appliances for
shifting or adjusting the eccentric centre so as to increase or diminish the radius,
and for reversing the throw, or motion of the same.
The uses and application of these improvements are various and may be:
advantageously adopted in any class of machinery where either a uniform or
variable movement is required, also for putting in motion or bringing to a state of
rest certain parts of machinery while other parts of such machinery may continue
in motion.
The objects of my Invention are as follows:-
1. To effect a change in the length of the eccentric radius, or throw of eccentric
wheels by varying or shifting the centre or axis, of rotation from zero to any
suitable point or position.
2. To reverse, while in motion or at rest, the throw or movement of eccentrio
wheels.
3. The construction and arrangement of simple and efficient appliances for
attaining these objects, or any of them.
For the purposes of the said Invention I construct a wheel or disc and make it
of iron or other metal or material with a groove or recess either on the circular or
flat part of the periphery for receiving a ring or roller or other appliance for
transmitting the motion to any other appliance connected therewith or vice versa.
I also make a rectangular circular, or other space through a cross-section of the
said wheel or disc for containing or admitting the appliances for shifting the
eccentric centre.
In the said space and upon the revolving shaft I firmly fix or secure a suitable.
eye or block to fit and move therein, said eye or block being made with guides so
as to retain and hold firmly in position the eccentric wheel.
I effect a change in eccentric centres by the use of a rhomboidally or other
suitably shaped. block fitted to, and capable of sliding to and fro on the revolving:

page_text: shaft. Said block having two parallel sides forming two inclined planes opposite to
each other resting in a bearing at each end, and fitted diagonally upon the revolving
shaft with a space between the said bearings to admit of its sliding to and fro over
the said eye or block which is firmly secured upon the revolving shaft.
On one or both ends as may be desirable the said block is made with a guide
wheel or disc in which a recess is formed to receive the end of a lever or other
appliance for shifting it to and fro on the revolving shaft.
As a modification of the foregoing I employ a circular block which is pinned or
secured eccentrically on the revolving shaft and fitted into a circular space in the
eccentric wheel which is firmly secured by guides in its position, said guides
admitting of the external wheel moving freely round upon the circumference of
the inner circular block to any required point or position. This may be effected by
a ferrule with guide rods and a pin or roller sliding in a groove inclined upon a
cylinder or other suitable means.
'
'
By appliances such as are herein described eccentric wheels may be reversed in
motion or varied to any required travel or throw, or the eccentric radius may be
reduced to zero and bring to a state. of rest any moving appliances connected
therewith, while at the same time. the eccentric wheel continues in motion upon
the revolving shaft.
1
COMPLETE SPECIFICATION.
I MATTHEW HESLOP of No 11. Palmerston Buildings in the city of London
Consulting Mining Engineer do hereby declare the nature of my said invention
for "IMPROVEMENTS IN ECCENTRIC WHEELS AND IN APPLIANCES CONNECTED, THERE-
WITH" and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:-
...
My invention relates to improvements in eccentric wheels with appliances for
shifting or adjusting the eccentric centre so as to increase or diminish the radius
and for reversing the throw or motion of the same.
=
The uses and applications of these improvements are various and may be
advantageously adopted in any class of machinery when either. a uniform, or
variable movement is required also for putting in motion or bringing to a state of
rést certain parts of machinery while other parts of such machinery. may continue
in motion.
My invention will be clearly understood by reference to the annexed drawings
in which Figure 1 shows an elevation of my constructed arrangement. Figure 2ian

page_text: part sectional view. Figure 3 an end elevation and Figure 4 a detached view of
the block D which is fitted within a rectangular slot of the eccentric cam and upon
which a rhomboidally shaped block (by which the variable stroke of the eccentric
is effected) is made to slide when thrown along the shaft by the clutch lever whose
fork works within the groove of the disc.
A is a wheel or disc (of iron or other metal or material) with a groove or
recess B either on the circular or flat part of the periphery for receiving an
eccentric strap, ring, or roller or other appliance for transmitting the motion to any
other appliance connected therewith.
This disc A has a space C of rectangular shape but it may be circular or of other
shape for containing or admitting an appliance composed of a block D held to said
disc by a plate D¹, said eye or block D is fixed upon the shaft E and made with
guides D¹, F, (see Figure 4) so as to retain and hold in position the eccentric
wheel A.
A rhomboidally or other suitably shaped block G is fitted to and capable of
sliding to and fro on the revolving shaft E and within the space C of the eccentric
disc A, said block G having two parallel sides I, J, forming two inclined planes.
opposite to each other resting in bearings K, K, at the ends and fitted diagonally
upon the revolving shaft E with a space between the said bearings to allow of its
movement along the said eye or block D.
On one or on both ends K, K, as may be desirable the block G is made with a
clutch wheel or disc L in which a recess M. is formed to receive the fork of a lever
or other appliance for shifting it with the block G to and fro on the revolving
shaft E.
As shown at Figure 1 the dotted lines lines indicate the movement of the block G
to about mid-distance of its travel at which position the disc wheel A has lost its
eccentricity consequently there would be no movement of its strap or the lever
connected with it, but by moving the block G farther along to the right or to the
left, a reverse eccentric throw to the desired extent within the range of the two
inclines I, J can be obtained, the clutch lever being held temporarilly by a notch
in a rack bar, or other convenient appliance.
The essential feature of importance in this my invention is the block D, which
by its connection with the main shaft and within the slot of the eccentric disc A
in the manner set forth, enables the disc to rise and fall and accomodate itself to
the position at which the rhomboidal block G is moved.
Figures 5, 6, 7, 8 and 9 represent a modification of the foregoing. In this
modification I employ a circular block G, which is pinned or secured on the
revolving shaft E, and fitted into a circular space on the eccentric wheel A, which
eccentric wheel A is firmly secured in position by guide rods N fixed to the disc Q,
said guide rods N admitting of the disc or wheel L moving freely upon the
circumference of the circular block D to any required point or position by its key
riding in the groove P.
The opposite end of these guide rods N take into and loosely fit slots R, S,
formed in the inner face of the eccentric wheel A, and as the clutch disc L is moved
along, its key riding in the groove P of the block D causes the disc Q and the
rods N to move round therewith, the ends of the guide rods N; N, moving in the
slots R, S, at the same time.
The outer face of the disc A is provided with an eccentric block G also keyed
upon the shaft E and as the disc L is moved along, the guide rods N move within
the slots R, S, and the block G moves the disc A round and thus set it eccentrically
on the shaft E.
The eccentric disc A is mounted loosely upon, and is held in position by the
shoulder of the eccentric block G which as before stated is fixed to the shaft E,
the eccentric disc A moving round the shaft E according to the slot U provided
for it.
The slot R is eccentric to the shaft E and is very long when compared with
the slot S which is not curved but the movements for the shift of the eccentric

page_text: correspond to their respective lengths, the consequence is the disc A when moved
round to obtain the desired throw is held in that position until the disc L is again
shifted.
In the position of the disc L shown in full lines in Figure 5, the guide rods
being then as shown at Figure 8, the, disc A would rotate as an ordinary wheel
with a truly circular rotation, but when the disc L is moved over to the position
shown by the dotted lines in Figure 5, the rods N would occupy the position
shown at Figure 9. The disc L can then be thrown to the fullest extent to enable
the block G to move the disc A over to the full eccentric action as shown in
Figure 10.
By making zero in centre of block D shown in dotted lines Figure 5 on moving
said disc L towards disc A or disc Q the reverse travel of the eccentric rod or lever
takes place.
By appliances such as are herein described eccentric wheels may be reversed in
motion or varied to any required travel or throw, or the eccentric radius may be
reduced to zero and bring to a state of rest any moving appliances connected
therewith while at the same time the eccentric wheels continue in motion upon the
revolving shaft.
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 combination with a rhomboidal block G Figure 1, the guide block D
working within the same and within disc A capable of being thrown from a true
rotative wheel to an eccentric wheel of any extent of throw corresponding to
inclinations or to the inclined surfaces of said rhomboidal block as and for the
purpose or purposes set forth.
2 The production of an eccentric position of a disc wheel by the action of guide
rods moving, witbin slots and receiving their motion by a disc working within a
grooved block as hereinbefore described with reference to Figures 5, 6. 8. 9 and 10
of the annexed drawings.
3 The disc wheel A provided with slots shown in Figures 8, 9 and 10 in one
face and an eccentric, block G within the other face as at Figure 7 by means of
which its eccentric action can be determined from zero as herein before described
for the purpose, or purposes set forth.