Mechanism for Converting Pedal or Reciprocating Motion into Rotary Motion.
Year: 1895

page_text: Date of Application, 7th May, 1895
Complete Specification Left. 7th Mar., 1896-Accepted, 25th Apr. 1896
PROVISIONAL SPECIFICATION
Mechanism for Converting Pedal or Reciprocating Motion into
Rotary Motion.
I, OSBORNE BAKER, of Osborne, Province Ontario, Canada, Mechauic, do
hereby declare the nature of this invention to be as follows
-
In this invention a rod or pitman jointed at one end to a pedal or treadle or
other reciprocating part is carried thence to pass between two pullies mounted 10
the sume plane each on an internal ratelet wheel or an equivalent thereof. Each
of two sides of the rod or pitman carries a belt or cord which is wound over its
corresponding pulley. When the pullies by the movement of the pitinan are
turned in opposite directions one will drive iound its internal ratchet wheel and
the spindle on which said ratchet wheel is fixed and the other will slip over the
ratohet teeth of the other ratchet wheel, and vice versa when the pitman performs
an opposite stroke so that by connecting the two ratchet wheel shafts by a belt and
pullies a continuous rotary motion is the result. The mechanism together with a
wheel to which the rotary motion is thus communicated, is carried in a frame which
may be attached to a machine to be driven say to n sewing machine.
Datel this 7th day of Nov 1895
THOMAS R. SHILLITO,
80 Chancery Lane, London, W C., Agent for the Applicant.
Mechanism for Converting Pedal or Reciprocating Motion into
Rotary Motion.
I, OSBORNE BAKER, of Osborne, Province Ontario, Canada, Mechanic, 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:-
In the accompanying drawing
Fig. 1 is a side elevation of the mechanism of this invention shewn by way of
example as applied between the driving wheel and a pedal of a sewing machine.
Fig. 2 a section on line 2-2 of Fig. 1 and Fig. 3 a section on line 3-3 of
Fig. 2 ou an enlarged scale.
A 18
a sewing machine standard upon which the mechanisin is mounted.
Ba pedal. Ca diving wheel Da frame carrying the mechanism and adapted to
be secured to the standard of any machine to which the mechanism 18 to be applied
said frame consisting substantially of a yoke having at its opposite sides, bearings
for the ends of the spindles of the mechanism. The driving wheel C 18 fixed on a
spindle C' with one end C+ formed conical where it takes into a corresponding
bearing d'in the side bar D' of the frame D. The other end of spindle C 18
carried on au adjustable bearing formed on the end of a screw C' passing through
the side D of the frame. The screw is fixed by a nut C. D³ is an arm of the
frame D serving to afford a bearing for one end of a spindle f the other end of
01

page_text: which is provided with an adjustable bearing on a pointed screw f¹ fixed by a
nut f'.
On each of the spindles C¹ and f there is a clutch device consisting of a ratchet
disc G. a drum G enclosing the same, and provided on its inner circumference
with oblique pockets g each holding a roller g' adapted to engage with the teeth of
the ratchet disc when they roll down the incline of the pockets, and adapted to be
forced up the inchino by the reverse or slipping movement of said disc, but this
specific form of clutch 18 not a part of the invention as any suitable clutch
mechanism may be employed at this place in the device. His a pitman passing
between the two clutch devices and connected at its lower end to the pedal B and
baving attached to it cords or belts J which also pass 1ound the drums G to which
they are secured at 1. The ratchet discs turn in the same dnection whereby they
have opposite motion at their edges proximate to the pitman, so that the stroke of
the latter in one direction rotates one ratchet or clutch disc and causes the drum
on the other ratchet disc to slip whilst the reverse stroke of the pitman operates
the ratchet disc over which its dium had previously slipped, and operates the drum
to slip over the other ratchet disc which had been just previously rotated
the rotary motion communicated to the spindles is in the same direction.
pulleys and F a band connecting them by which means the spinille C¹ 18
continuously rotated either from one clutch device or the other.
Thus
Fare
It will be understood that this mechanism 18 adapted to translate the rocking
motion of the pedal into a continuous rotary motion of the driving wheel whether
the stroke of the pedal be long or short or of varying length, also that when the
cords or belts J encircle the drums once only, a full stroke of the pedal in each
direction produces substantially one complete revolution of the driving wheel. In
order however that the operator may be relieved of the necessity of guarding
against too long a stroke which, when the cords or belts encircle the drums but
once, would tend to tear them from their fastenings on the drums, stops are
provided for limiting the stroke of the pitman in each direction. These stops are
preferably elastic or yielding say in the form of springs H' secured to the pitman
in such a way as to collide with the drums respectively just before the limit of the
stroke, and to be put under tension while the stroke continues to the limit, and by
their reaction to initiate the reverse movement of the pitinan. The free end of the
springs, such as those illustrated, may be covered with rubber H2 to prevent noise
when the springs stuke the drums. The momentum of the pedal itself will tend
to carry the pitman to the end of its stroke against the resistance of the spring
stop, even though the operator takes off the pressure as he 18 accustomed to do in
the ordinary pedal movement, a little before the end of the stroke.
Inasmuch as the momentum of the driving wheel does not assist the action of
the devices which drive it and as the machines to which the mechanism is intended
to be applied usually have a balance wheel of then own, it is preferred to make
the wheel C as light as practicable to the end that the monientum may be very
slight so that it may be easily started and stopped and for this reason said wheel
may be made after the manner of cycle wheels with light wire spokes and a light
rim as shew D.
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 16-
1. The driving wheel and the mechanism for driving it, comprising diums or
sheaves clutched to their spindles respectively, the pitman and the cords on belts
which conuect it to the drums, in combination with yielding stops on the pitman
adapted to collide with the drums to check the stroke of the pitman before the end
of the game in each direction, substantially as described and shewn
2. In combination the driving wheel and its spindle and the clutch drum thereon,
the spindle fand the clutch drum thereon, the pulleys on said spindles respectively
and the belt upon them, the frame which caties both said spindles and affords

page_text: hearings for them at their ends, and the pitman reciprocating between the plane of
the driving wheel and the plane of the pulleys, and also between the drums,
substantially as described and shewn.
3. The general arrangement and combination of parts constituting the mechanism
of the invention, substantially as described and shewn.
Dated this 7th day of March 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.