Year: 1895

page_text: тартоѵошению
I, FREDERICK RICHARD SIMMS, of 49, Leadenhall Street, in the City of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in adjustable speed gear for use in
connection with gas or petroleum motors, lathes and other machinery.
In carrying out my invention I provide on the driving or motor shaft and on the
shaft to be driven a grooved wheel or pulley formed in two conical parts, one of
which parts is connected to the shaft supporting it while the other is adapted to:
move upon the shaft. The faces of the cones in each wheel are provided with
slots, the bars between the slots in one cone engaging with the slots in the other
cone so that by moving the movable cones more into or out of engagement with
the fixed cone I can vary the diameter of the wheel or pulley. A suitable chain or
belt can be used to connect the two wheels or pulleys. Suitable mechanism such:
as a rocking arm is employed which when operated in either direction moves one
cone to increase the size of one wheel and the other cone to decrease the size of
the other wheel. Or by arranging the cone of one wheel upon one side and the
cone of the other wheel upon the opposite side, a reciprocating bar can be employed:
to move the cones.
In some cases I dispense with the movable cone in each wheel or pulley and
employ a series of pairs of toggle arms, the free ends of one arm of each pair
passing through one of the slots in the fixed cone and being jointed to the same.
while the free end of the other arm is connected to a boss sliding on the shaft.
Or one toggle arm of each pair connected to the fixed cone can be dispensed with,
the other arm being bent at one end so as to form a V-shaped recess with the cone,
which end passes through one of the slots in the latter and engages by means of a
pin with a slot in the interior of the cone.
I can employ a series of pairs of toggle arms to form each cone, the outer arms
of each opposing pair being jointed to a fixed boss and to a movable boss respec-
tively while the inner armis cross one another, that jointed to the arm connected to
Or a series of
the fixed boss being jointed to the movable boss and vice versa.
pairs of toggle levers may be employed, their ends where jointed together being
extended to form the cones.
I sometimes connect the two wheels by a third or intermediate wheel pivoted on
a lever and brought into contact with the other two wheels by suitable means such
as a worm. By moving this intermediate wheel backwards or forwards by means
of the lever I cause the one wheel to increase in diameter and the other to decrense
in the same proportion. The rim of this wheel is advantageously provided with a
tyre of india-rubber or rubber composition or with a pneumatic tyre whereby good
friction or close contact with little or no noise when running is obtained.
of December 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.

page_text: I, FREDERICK RICHARD SIMMS, late of 49, Leadenhall Street, now of
Amberley House, Norfolk Street, Strand, London, Engineer, 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 relates to improvements in adjustable speed gear for use in
connection with gas or petroleum motors, lathes and other machinery.
In carrying out my invention I provide on the driving or motor shaft and on the
shaft to be driven a grooved wheel or pulley formed in two conical parts, one of
which parts is connected to the shaft supporting it while the other is adapted to
move upon the shaft. The faces of the cones in each wheel are provided with
slots, the bars between the slots in one cone engaging with the slots in the other
cone so that by moving the movable cone more into or out of engagement with
the fixed cone I can vary the diameter of the wheel or pulley. A suitable chain or
belt can be used to connect the two wheels or pulleys. Suitable mechanism such
as a rocking arm is employed which, when operated in either direction, moves one
cone to increase the size of one wheel and the other cone to decrease the size of
the other wheel. Or by arranging the cone of one wheel upon one side and the
cone of the other wheel upou the opposite side, a reciprocating bar can be employed
to move the cones.
In some cases I dispense with the movable cone in each wheel or pulley and
employ two sets or series of toggle arms jointed together in pairs, the free ends of
one set of arms passing through the slots in the fixed cone to which they are
jointed while the free ends of the other set are connected to a boss sliding on the
shaft. Or one toggle arm of each pair connected to the fixed cone can be
dispensed with, the other arm being bent at one end so as to form a V-shaped
recess with the cone, which end passes through one of the slots in the latter and
engages by means of a pin with a slot in the interior of the cone.
can employ a series of pairs of toggle arms to form each cone, the outer arms.
of each opposing pair being jointed to a fixed boss and to a movable boss respec-
tively while the inner arms cross one another, that jointed to the arm connected to
the fixed boss being jointed to the movable boss and vice versa. Or a series of
pairs of toggle levers may be employed, their ends where jointed together being
extended to form the cones.
I sometimes connect the two wheels by a third or intermediate wheel pivoted on
a lever and brought into contact with the other two wheels by suitable means such
as a worm. By moving this intermediate wheel backwards or forwards by means
of the lever I cause the one wheel to increase in diameter and the other to decrease
in the same proportion. The rim of this wheel is advantageously provided
with a tyre of india-rubber or rubber composition or with a pneumatic tyre
whereby good friction or close contact with little or no noise when running is
obtained.
To enable my invention to be fully understood I will describe it by reference to
the accompanying drawings, in which :-
Figure 1 is an end view of adjustable speed gear constructed according to my
invention :
Figure 2 is a sectional plan of the same:
Figure 3 is a front view of the two cones •

page_text: toggle arms:
Figure 8 is a section on the line 8-8 of Figure 7:
Figure 9 is a similar view to Figure 8 of a modification :
Figure 9 is a sectional elevation of part of the same:
Figure 10 is an end elevation of adjustable speed gear provided with means for
operating the movable cones and with an intermediate wheel for transmitting the
motion.
Figure 11 is a plan of the same:
Figures 12 and 13 are similar views to Figures 10 and 11 of a modified
construction of my speed gear.
Similar letters of reference indicate the same or corresponding parts in the
several figures.
a is the driving shaft, and b the driven shaft. c, c are the fixed cones and d, d the
movable cones and e, e are the slots with which the faces of the cones c, c and d, d
are provided.
Referring to Figures 1, 2, and 3, the cones c and d are arranged on the shafts a
and in such a manner that the bars e', e¹ left between the slots e, e of one cone
(in the drawing the cone c) enter onto, or engage with, the slots e of the other cone
when the movable cone is moved on its shaft. is a rocking lever or arm adapted
to be operated by the spindle f¹ so as to move the movable coued on the driving
shaft a more into engagement with the fixed cone c and at the same time the
movable cone d on the driven shaft 6 more out of engagement with the fixed
cone c so as to reduce the speed of the said driven shaft or vice versa. g is a belt
or chain by means of which the pulleys formed by the two pairs of cones are
connected.
In the arrangement shewn in Figures 4, 44 and 5, the movable cones d, d are
dispensed with and d, d are the bosses used in lieu thereof. h, h are the toggle
arms pivoted at one end to the boss d and h¹, h¹ are the toggle arms which pass
through the slots e in the fixed cone c and the outer ends of which are jointed to
the free ends of the toggle arms h, whilst their inner ends are jointed to a boss i
inside the fixed cone c as shewn clearly in Figures 4 and 5. By this arrangement
it will be obvious that the toggle arms form with the fixed cone c a series of
V-shaped recesses which serve as a pulley. By moving the bosses d on the shafts a
and b by means of a rocking arm, such as that shewn in Figure 1, or by any other
suitable arrangement, the diameter of the pulleys so formed by the toggle arms and
cones can be varied as desired.
Figure 6 shews the arrangement in which only one series of toggle arms is
employed, that is to say, the toggle arms shewn in the preceding arrangement
are dispensed with. The arms h, jointed to the boss d have their free ends bent
so as to form V-shaped recesses with the fixed cone c, the said ends passing through
the slots e, e in the said cone and being secured to the same by means of pins h³, h³,
which work in slots 3, 4, in the interior of the said fixed cone. This arrangement
is operated similarly to that above described.
Figures 7 and 8, illustrate the arrangement wherein the cones are formed by
pairs of toggle arms. In this case the fixed and movable cones cand d respectively,
are replaced on the shaft by the fixed and movable bosses c and d. h, h are two
series of toggle arms jointed to the movable boss d and h¹, h¹, are two series of
toggle arms jointed to the fixed boss c. The outer ends of the said arms
jointed to the outer ends of the arms h¹ in such a manner as to form a V-shaped
recess between every two pairs.
are

page_text: In Figures 9 and 94 only one series of arms is jointed to each boss, the two
sets h, h of arms being jointed to one another near their outer ends, the said outer
ends being extended so as to form the V-shaped recesses for the pulleys as clearly
shewn.
These two arrangements are operated by a rocking arm or the like as above
described.
Figures 10 and 11, are views illustrating the arrangement wherein the movable
cones are operated by a reciprocating bar and wherein the motion of the driving
pulley is transmitted to the driven pulley by an intermediate wheel. j is the
reciprocating bar engaging with the bosses of the two movable cones d, d which,
as shewn, are arranged on opposite sides of the pulleys of which they form a part.
k is a lever for reciprocating the bar i, the said lever being pivoted at k¹ and provided
with a guide in which the inclined portion j' of the reciprocating bar slides.
With this construction it will be obvious that when the lever is reciprocated
by the rod the bar; will be moved parallel with the shafts, that is to say, in such
a manner as to move one of the movable cones' d more out of engagement and the
other more into engagement with its respective cone c. m is the intermediate
wheel, the said wheel being mounted on a spindle m₁ secured to the lever k so that
when the said lever k is reciprocated the wheel m also reciprocates, thus allowing
the two pulleys to expand and collapse whilst still making contact with both.
n' are two pulleys for rotating the driving shaft a.
n,
In the adjustable gear shewn in Figures 12 and 13, only the driving shaft a is
provided with an adjustable pulley, the said pulley having two movable cones d, d
whilst the driven shaft b. is provided with an ordinary pulley o.
p is a frame
mounted loosely on the driven shaft b and supporting at its outer end two friction
wheels or discs m, m°. The wheel m engages with the adjustable pulley on the
driving shaft a whilst the wheel m° engages with the pulley o.
9, q are a lever
and rod respectively for turning the frame p on the driven shaft b and r, rare
springs on the driving shaft, such springs tending to force the two cones d, d
towards one another.
With this construction it will be obvious that the motion of the driving shaft a
is transmitted to the driven shaft b through the medium of the two friction wheels
or discs m, mº, and it will also be obvious that the speed of the said driven shaft
can be regulated by causing the two cones d and d to recede from one another to a
greater or less extent through the medium of the frame p and lever and rod 2,9¹
by means of which the pulley o can be caused to approach or recede from, the
driving shaft a thus causing the cones d and d to recede from or approach one
another to the desired extent.
It will be obvious that both the cones or bosses in all the arrangements above
described besides that illustrated in Figures 12 and 13 can be made movable on
the shafts.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Adjustable speed gear wherein the driving or driven shaft or both shafts is
or are provided with a fixed cone and with a movable cone the faces of which
cones are slotted in such a manner that the bars left between the slots of one cone
can engage with the slots on the other cone so as to form a pulley, substantially as,
and for the purpose, herein before described.
2. Adjustable speed gear wherein the driving or the driven shaft or both shafts
is or are provided with a fixed cone the face of which is slotted, and with a movable
boss having a number of arms jointed to it, the outer ends of the said arms being
jointed to the outer ends of a number of arms which pass through the slots in the
cone to which they are connected in such a manner as to form a pulley, substantially
as described.
3. Adjustable speed gear wherein the driving or the driven shaft or both shafts

page_text: is or are provided with a fixed cone, the face of which is slotted, and with a movable-
boss and with a number of toggle arms jointed to the said boss and movably
connected with the cone, through the slots of which they pass, in such a manner
as to form a pulley, substantially as, and for the purpose, herein before described.
4. Adjustable speed gear wherein the driving or the driven shaft or both shafts
is or are provided with a fixed boss, with a movable boss and with two series of
toggle arms jointed to the said bosses and to one another in such a manner as to.
form a pulley, substantially as hereinbefore described.
5. Adjustable speed gear wherein the driving or the driven shaft or both shafts
is or are provided with a movable and with a fixed boss to each of which bosses a
series of toggle arms is jointed the said toggle arms being jointed to the corre--
sponding arms of the other boss near their outer ends in such a manner as to form
a V-shaped recess, substantially as, and for the purpose, herein before described.
6. In adjustable speed gear of the kind described in the preceding claiming
clauses operating the movable cones or bosses by means of a rocking or of a.
reciprocating arm, substantially as described.
7. In adjustable speed gear of the kind described in the preceding claiming
clauses the employment of a reciprocating arm for operating the movable cones or
bosses of a pivoted lever for reciprocating the said arm and of an intermediate or
friction wheel for transmitting the motion from the driving to the driven pulley
the said wheel being mounted on the pivoted lever, substantially as, and for the
purpose, herein before described.
8. Adjustable speed gear wherein the driving or the driven shaft is provided
with an adjustable pulley of the kind described in the preceding claiming clauses.
and wherein the driving or driven shaft is provided with an ordinary pulley fixed
thereon and with a swinging frame supporting two friction pulleys designed to
engage respectively with the adjustable pulley and with the fixed pulley,.
substantially as, and for the purpose, herein before described.
9. The manufacture and use of the various forms of adjustable speed gear-
herein before described and illustrated respectively in Figures 1, 2 and 3 ;-
4, 5 and 5; 6; 7 and 8; 9 and 94; 10 and 11; and 12 and 13, of the accom--
panying drawings.
Dad the 10th day of October 1896
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.