Improvements in Double-acting Winding Mechanism for Rotating Shafts in One Direction.
Year: 1894

page_text: Date of Application, 2nd Nov., 1894-Accepted, 8th Dec., 1894
Improvements in Double-acting Winding Mechanism for Rotating
Shafts in One Direction.
I, OSCAR WERNICK, of Schützenstrasse, Potsdam, in the Empire of Germany,
Manufacturer, do hereby declare the nature of my said 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 mechanism or gearing, which enables motive power
produced by cord, chain or strap driving-gear, more especially in combination with
a pedal or treadle arrangement, and acting by successive strokes or steps, to be
turned to account for the purpose of imparting rotary motion to a shaft in a given
direction.
In the accompanying drawings
Figs. 1 to 4 represent one form in which the improved driving gear may be carried
out; Figs. 1 and 2 being side elevations of the clutch device of improved
construction adapted to be interposed between the band or strap winding rollers,
while Fig. 3 is a front view, and Fig. 4 a section of the arrangement.
Figs. 5, 6 and 7 are respectively, two side elevations and a plan of the band
winding mechanism operating through the medium of suitable gearing, and
provided with a double bell-crank lever or toggle joint-lock-device, such as is shown
in Figs. 1 to 4.
Figs. 14, 24, 34, are views corresponding, respectively, t Figs. 1, 2, 3, and
showing a modification of the improved mechanism, in which adjustable toothed
bolts are subjected to the bi-lateral action of the clutch device.
In the arrangement, shown in Figs. 1 to 4, B, B¹ designate the two band or strap
rollers each provided with two winding grooves and loosely mounted upon the
shaft A to be operated. The rollers are arranged to turn on both sides of the
pulley or disc C which, through the medium of suitable gearing, actuates the clutch
mechanism, such disc C being secured to the said shaft A'. The faces of this
pulley, which are turned towards the band winding rollers B, B! are provided with
circular recesses, while on the inner faces of the latter are arranged, on each side,
first the loose pulley D, D', adapted to be set in motion by frictional contact; and
further, upon the pins or pivots g, g' thereof, are mounted flat locking jaws or
plates d, d, having a certain radial play, the outer shoe-like extensions K of which
are destined to operate against the undercut inner edge of the recess in the side of
the pulley; while the inwardly directed extensions are pivoted to the sides of the
naves or bosses of the band roller B, B', by means of pins or pivots h, h³.
In this manner each locking plate d, d forms a rotary and simultaneously sliding
knee or toggle-joint which by the relative rotation of the band rollers B, B¹, to
the pulleys D, D', may either be opened (as shown in Fig. 2) or bent into knee-
shape (as Fig. 1 sbows). By turning the band roller in one direction so as to
cause the toggle joint to open out as shown in Fig. 2, the locking plates being at
the same time caused to slide outwardly on their pivots, these plates become firmly
clutched within the edges of the pulleys and couple the band roller with the
pulley C, mounted upon the shaft A in such manner that the rotation of the said
roller is participated in by the shaft A. When, however, the roller B or B' is
rotated in the opposite direction, the locking plates are automatically released
(Fig. 1) without interfering with or being influenced by the pulley C still rotating
in the same direction. The clutch devices on either side of the pulley Care so
arranged, that the band rollers only impart rotary motion to the shaft A, when

page_text: turned in one direction, viz. in the direction indicated by the arrow in Fig. 2;
these band rollers, however may be rotated in the opposite direction without their
motion imparting any action to the shaft.
The alternating reciprocating motion of the band rollers B, B¹ in such manner
that the effective rctary motion correspouds to the free ineffective return
of same, is obtained by the following band or strap arrangement. Upon the band
roller B are wound in opposite directions the two. drawing straps bands or,
chains M, N, while on the other band roller B₁ are wound the two draw-
bands M' N'. N, M' are the driving bands or straps i.e. those straps, which, when
being unwound, produce a rotary motion in the same direction as the shaft. The
free end of the driving band N is connected to the end of the band N' wound in
the opposite direction upon the other roller B', such connection being made by
ineans of the rod f, and in the same way, M' is connected by means of the rod f
with the band M wound in the opposite direction upon the roller B. The arrange-
inent is such that the motive power is exercised alternately upon a cord S,
connected with the coupling rod, joining the two bands or straps N, N' and
upon a cord S which, through the medium of the coupling rod facts upon
the bands M, M¹.
If, for instance, the driving band N is caused to unwind by drawing the cord S,
the result is that not only does the roller B turn in the direction necessary for
operating the shaft A, but that in addition to this, the other roller B' is at the
same time set turning in the opposite direction, through the medium of the band N¹
which is at the same moment, drawn downwards. It follows that the other driving
band M' and the band M are so wound up, during this operation, that they are
ready for unwinding, when the cord S is next pulled, and a fresh impulse is given
to the shaft. At that moment the bands N' are drawn upwards, i.e. in the direction
opposite to that followed before; it will therefore be evident that the shaft A may
be driven continuously by alternately drawing the cords S and S'.
The modified arrangement shown in Figs. 14, 24, 34, is similar to that described
above, both in regard to its method of operation and in regard to the manner in
which the driving hand or belt is disposed, the only difference being the means
which is employed in this case in order to produce the alternate engagement of the
clutch device with the shaft A.
The main feature of this modification is that between two toothed rings, each
of which is connected with its corresponding band roller B, B', there are interposed
three toothed wedges or racks K, inovable or adjustable bolt-like, in the axial
direction, against a three-armed carrier C, C¹ attached to the shaft A. The ends
of these bolts or wedges K nct like pawls by being slided so as to alternately
engage with band, with which the toothed rings, as they turn in one direction
effectively come into gear. Owing, however, to the slanting shape of the ratchet
teeth, whenever any one of the said toothed circles or ratchet-wheels b or b' turus
in the opposite direction, the said pawls are thrown out of gear, only to engage
again in an offective manner with the toothed circle or on the other side.
Thus it will be understood, that the process of throwing the operative parts into
gear and producing driving power, alternately, is the same in this arrangement as
that performed by means of the toggle-joint plates in the arrangement shown in
Figs, 1 to 4, and that, here also, the shaft may continue to revolve in the same
direction without being checked.
Figs. 5, 6 and 7 represent gearing fitted for winding cords. In this case tho
locking plates d, d' are arranged on either side of the fast pulley or disc C mounted
on the shaft A, in the same manner as in the arrangement shown in Figs. 1 to 4.
Upon a counter-shaft, the two cords S, S' adapted to be wound and unwound,
respectively and preferably connected at their inner ends are wound. Of the
toothed wheels N', M, one is directly in gear with the wheel M', the bush or
sleevo 13 of which is in the same relative position to the clutch device on the
disc C, as the band roller designated by the same letter B in the arrangement
previously described, while the other toothed wheel M engages, through the medium

page_text: of the intermediate wheel O, with the wheel N on the sleeve (previously, the band
roller) B situated on the opposite side of the disc. In this manner the sleeves B, B
roceive rotary motion in opposite direction whenever the counter-shaft is
reciprocated by a pull on either cord S, or S', just in the same way as though they
were directly connected with cord-winding mechanism, as in the first mentioned
arrangement. The resulting facility of obtaining uninterrupted rotary motion by
applying tension, alternately, to the cords S and S', is therefore equal to that which
is afforded by the arrangement described in the first instance. It may also be
mentioned, that, wherever bands or cords are here supposed to be employed, other
tensile driving mediums, such as chains, genring with chain-wheels or equivalent
devices may be adapted.
Having now described and ascertained the nature of my said invention,
and the manner in which the same is to be performed, I declare that what
I claim is :-
-
1. Improved double-acting band or strap winding mechanism for driving shafts
in one direction, wherein two sleeves or clutches such as B, B', loosely arranged
on both sides of a pulley or disc, such as C, secured to the shaft, are operated in
opposite directions, respectively, by means of suitable tensile driving gear,
substantially as described aud shown in the drawing.
2. Improved double-acting band or strap winding mechanism for driving shafts
consisting of toggle-joint links or plates, such as d, d¹, arranged to act radially
against the outer rim of the disc, C, and capable of rotary displacement on the
pivots or spindles, such as g, y', of loose friction pulleys, such as D, D' such links
or plates being connected by means of pius or pivots h, h' to loose sleoves on the
shaft in such manner that they may be brought into the operative position, or
inoperative position, according to the direction in which the said sleeves turn,
substantially as described and shown in Figs. 1 to 4 of the accompanying
drawing.
3. Improved double-acting baud or strap winding mechanism for driving shafis,
consisting of movable or adjustable bolts or pawls, such as K, which are arranged
at right angles to the device, such as C, C, imparting motion to the shaft to be
driven, and the toothed-shaped heads of which, being bevelled on both sides, are
adapted so to act in conjunction or in gear with the toothed circles or ratchet
wheels, such as b, b', secured to the bushes or sleeves B, B', that they engago
alternately, thereby throwing the driving mechanism into gear, substantially as
described and shown in Figs. 14, 24, & 3ª of the accompanying drawings.
4. Improved double-acting baud or strap winding mechanism for driving shafts,
consisting of sleeves, such as B, B' which are turned in opposite directions, by
means of cords such as S and Si, wound and unwound upon a counter shaft such
asf, the reciprocating or alternate rotation of which in opposite directions being
transmitted to the sleeves B, B', through the agency of tooth gearing, for which
purpose one of these sleeves, B, is driven by means of an intermediate wheel,
such as O, interposed between the toothed whools, N, M, while the other sleeve B³,
is operated by a pair of gear wheels N¹, M¹, direct, substantially as described aud
illustrated in Figs. 5 to 7 of the accompanying drawing.
Dated this 2nd day of November 1894.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., Agents.