OR POWER GEAR APPLICABLE TO VELOCIPEDES AND FOR OTHER PURPOSES to be as follows:-
Year: 1884

page_text: We ROBERT ALLEN and WILLIAM JAMES WAKEFIELD of 323 High Holborn
Middlesex Machanists do hereby declare the nature of the said invention for
"SPEED OR POWER GEAR APPLICABLE TO VELOCIPEDES AND FOR OTHER PURPOSES
to be as follows:-
"
This gear is applicable to various mechanical purposes but we will describe it as
applied to a tricycle.
In this invention two toothed gear cones are employed the largest ring of teeth
of one facing the smallest ring of the other, and an idle wheel being arranged to
gear with both cones and move between the two as required.
The driving cone is secured upon the pedal shaft and the driven cone upon the
main axle or wheel of the machine.
The mechanism for removing the idle wheel may be varied but it may be done
by means of a sliding bar which carries the idle wheel and is connected by a link
with an angle lever working in a suitable guide with means for fixing it in the
various positions to suit the different portions of the cones which may be in gear.
This angle lever gives the necessary traverse to the idle wheel in one direction
and pins or projections upon the sliding bar taking into angle slots in the
supporting plate or framing give the traverse in the other direction the resulting
movement being that required to cause the idle wheel to gear with any of the
corresponding rings of teeth upon both cones.
Another movement is permitted by the whole gear for operating the idle wheel
being hung upon a pivot so that the idle wheel can be entirely withdrawn from
gear with the cones, in which case the treadles are released. The idle wheel is
withdrawn from gear first and then placed in the particular gear required and it
can be shifted at once from the highest to the lowest speed without touching the.
intermediate speeds.

page_text: We ROBERT ALLEN and WILLIAM JAMES WAKEFIELD at the Office for Patents
323 High Holborn in the County of Middlesex Machinists do hereby declare the
nature of our invention for "SPEED OR POWER GEAR APPLICABLE TO VELOCIPEDES
AND FOR OTHER PURPOSES" and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
This gear is applicable to various mechanical purposes but we will describe it as
applied to a tricycle.
In this invention two toothed gear cones are employed the largest ring of teeth
of one facing the smallest ring of the other, and an idle wheel being arranged to
gear with both cones and move between the two as required-These gear cones
may be cast or formed solid or made up of a series of toothed wheels of different
sizes fastened together with distance pieces between if required though in general
no distance pieces are required.
The driving cone is secured upon the pedal shaft and the driven cone upon the
main axle or wheel of the machine.
The mechanism for removing the idle wheel may be varied but it may be done
by means of a sliding bar which carries the idle wheel and is connected by a link
with an angle lever working in a suitable guide with means for fixing it in the
various positions to suit the different portions of the cones which may be in gear.
This angle lever gives the necessary traverse to the idle wheel in one direction
and pins or projections upon the sliding bar taking into angle slots in the
supporting plate or framing give the traverse in the other direction the resulting
movement being that required to cause the idle wheel to gear with any of the
corresponding rings of teeth upon both cones.
Another movement is permitted by the whole gear for operating the idle wheel
being hung upon a pivot so that the idle wheel can be entirely withdrawn from
gear with the cones in which case the treadles are released The idle wheel is
withdrawn from gear first and then placed in the particular gear required and it
can be shifted at once from the highest to the lowest speed without touching the
intermediate speeds.
In the accompanying drawings Figure 1 is a general front view of one
arrangement of this apparatus-Figure 2 is a detail view showing one form of
mechanism for operating the idle wheel another form being shown in Figure 3.
Figure 4 is a detail of the stop motion. Figure 5 is a general front view of a
modified arrangement of the gearing and Figure 6 is a side view of the same.
Like letters represent like parts.
A is the upper or driven cone and is fixed upon the main axle or in the case of
a single driver (velocipede) it may be put on the hub of the wheel. B is the lower
or driving cone and is upon the crank or driving axle-C is the idle wheel and as
shown in Figure I it is in gear with the smallest toothed circle of the driving
cone B and with the largest toothed circle of the driven cone A consequently the
gearing is arranged for power at the expense of speed.
Now to alter the relation of the speeds the idle wheel C must be moved in an
upward and inward direction towards the frame of the machine D. This upward
motion is accomplished by means of the lever E pivotted at E' upon the frame or
other tixed support by means of link E' this moves the slide F Figure 2 and with
it the pin C which is fastened to slide F and which carries the wheel C.

page_text: The inward movement is accomplished by sliding wheel C inwards upon the
pin C this may be done by the diagonal slide C² Figure 3 to which pin C would
be fastened, or by the lever motion shown in Figure 2, the link C is pivotted at
its upper end to the slide frame F1 its other end being jointed to the bell crank
lever G whose centre is pivotted to the slide F Its other limb is jointed to the
straight link C which is jointed to the sleeve on which wheel C turns or to a collar
upon the wheel boss. It will be readily seen that as the slide F is raised the
wheel C is by the action of the bell crank lever G and links drawn inwards
towards the slide-Conversely when the slide is lowered the wheel is forced
outwards along pin C¹. The hand lever E may be fixed in any required position
by a spring detent and a slotted segment in the well known manner.
It is necessary however in addition to the two motions already described to
traverse the wheel C in a horizontal direction so as to take it clear of the cones A
and B whilst changing the gears running free down hill and so forth This is
accomplished by the primary slide H which carries the slide F and its frame F¹
and is operated by the hand lever I whose arm I¹ is connected by link I² with
slide H. If the hand lever I be moved in the direction of the arrow the slide H
will be moved in the direction indicated by the arrow upon it and the wheel C
will be moved clear of the cones. Lever I may be fixed in a similar manner to
lever E but its segment need only have two recesses one for in gear and the other
out of gear.
As an additional means of fixing slide F in its various positions the spring J
Figure 4 fixed to the slide frame F1 carries the pin J' which passes through slide
frame F and takes in one of a series of holes F in slide F. The tendency of the
spring J is to keep the pin out of the hole as shown in Figure 4 but when slide H
is pulled home that is when wheel C is in gear with the cones, the bolt or
equivalent stop J³ forces the spring J up against the slide and pin J¹ then enters
the hole opposite to it and secures the slide. There are therefore as many holes F¹³
as there are series of teeth upon the cones-as shown in the drawing 5.
In working this apparatus the lever I is moved over thus by moving slide H
with drawing wheel C from gear with the cones the machine can now run free
down hill if desired without the cranks turning at all Lever E is now moved to
the required position which may be ascertained by the number or position of the
slot in its segment and fixed there by slipping the spring detent. This has moved
the wheel C up or down by means of slide F and inwards or outwards upon
pin C as already explained and placed it exactly in the right position for gearing
with the required sets of teeth upon the cones. It now only remains to replace
handle I and the slide H is replaced, wheel C in gear and pin J¹ pushed home in
slide F.
The action of the modification shown in Figures 5 and 6 is similar to that of
Figure 1 but the three wheels (two cones and idle wheel) are all placed in line
so that a line drawn from the centre of A to the centre of B will pass through the
centre of C-In this case the lower cone B and its shaft (the crank or pedal shaft)
is moved down so as to be disengaged from the idle wheel C and at the same time
the idle wheel C is moved down a less distance but sufficiently to disengage it
from cone A.
The lever I Figure 5 is pivotted on the frame at I' and by means of the link K¹
connects with a long slide K and by means of link L' connects with slide L as I
is moved in the direction of the arrow, slide K is lowered thus disengaging the idle
wheel C from cone A and slide L is also lowered and at a quicker speed because its
link L is jointed to I at a greater distance from its centre of motion I¹ than K¹
thus slide L travels farther than slide K and so cone B is disengaged from wheel C.
Reverse movement of I brings all three wheels into gear again as described in
connection with Figure I.
A relative up and down movement is also required for C and this is obtained by
the lever E which by link M' connects with a third slide M which works upon
slide K and moves when K is moved but is capable of independent movement
7588

page_text: upon K-Lever E being moved in the direction of the arrow draws slide M higher
up on slide K so that when slide K is replaced by lever I slide M (and therefore
wheel C whose pin C is fixed to slide M) is nearer the centre of A and farther from
the centre of B this movement of slide M upon slide K being greater or less
according to the proportion of gearing required. A glance at Figure 6 will show
the necessity for the upward. movement of wheel C. A reverse movement of
lever E of course moves C back again-The inward or outward movement of C
upon its pin C' is accomplished exactly as previously described the movement of
slide M upon slide K giving the motion to the bell crank lever G as in Figure 2
with slide F and its frame F¹.
The slide M may be locked upon K in a similar manner to that shown in
Figure 4 with reference to slide F.
The operation is just as before described lever I being first moved to disengage
the wheels, the lever E being adjusted to fix the proportion of the gearing and
lastly lever I being returned to its normal position (that shown in Figure 5) so as
to replace the wheels in gear.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim in the herein described speed and power gear is
First. As a mechanism for imparting to the idle wheel C the necessary oblique
movement the combination with slide F which carries the pin C¹ and so moves
the wheel C in one direction, if the bell crank lever G one arm whereof is
connected by link C with the wheel C and the other arm with the slide frame F¹
the lever G itself being pivoted to slide F whereby as the slide F moves the
wheel C is caused to traverse the pin C¹ in a direction at right angles to that
imparted by slide F the combined movements producing the oblique movement
required the whole constructed and operating substantially as and for the purpose
specified.
Second. The combination with the idle wheel C of the oblique slide C³ for the
purpose of imparting to the said wheel C the necessary oblique movement
substantially as specified and shown in Figure 3 of the accompanying drawings.
Third. As a means of removing wheel C entirely out of gear with the cones A
and B and returning it into gear with the same, the combination with said wheel C
of slide H to which is attached the slide frame F' substantially as specified.
Fourth. As a means of locking slide F the combination there with of spring
bolt J J which engages with the holes F2 when brought by the movement of
slide H into contact with the stud or projection Js substantially as specified and
shown in Figure 4 of the accompanying drawings.
Fifth. As a means of disengaging or re-engaging the idle wheel (with the
cones A and B the combination with the slides K and L of links K¹ and L'
pivoted to the hand lever I at different distances from its centre of motion K¹
being nearer to said centre than L' whereby as lever I is moved the motion
imparted to L is greater than that imparted to K substantially as specified and
shown in Figure 5 of the accompanying Drawings.
Sixth. The combination with slide K of slide M which works upon it and
imparts to wheel O the necessary oblique motion substantially as described and
shown in Figure 5 of the accompanying drawings.