Year: 1897

page_text: A communication from FERDINAND BELLET, Engineer, of 42, Boulevard Bonne
Nouvelle, Paris, in the Republic of France.
I, ALFRED JULIUS 'BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new device for transmitting movement by means of
oscillating toothed wheels and is applicable generally to all apparatus in which a
film band or ribbon is to be moved or wound up in one or the other direction, such
for instance as roller devices for, photographic stereoscopic or panoramic appa-
ratus stereoscopes graphiscopes magic lanterns projecting lanterns registering
apparatus type-writers and for similar purposes.
The devices according to the present invention will be explained by way of
example as applied to a roller frame.
The band which it may be desired to move alternately in one or in the other
direction according to the wish of the operator may be a paper band a photographic
film or any other flexible sheet which is capable of being rolled up.
Said band is capable of being alternately wound up on two rollers which are
rotatable on their parallel spindles supported in a framing the rollers of wood
metal or any other suitable material may be provided at each of their ends with a
circular flange serving to guide the rolling up of the band.
Each roller carries at one of its extremities a toothed wheel which when
rotated causes its corresponding roller to rotate; the other ends of said rollers are
preferably acted upon by small spring blades pressing against the framing and
serving to produce sufficient friction to prevent the rollers from rotating except
when they are rotated by the operator.
On the side of the framing on which are supported the ends of the rollers carry-
ing the toothed wheels is arranged the mechanism according to the present inven-
tion enabling the operator to actuate one or other of the rollers as desired by simply
turning a central milled knob or handle in one or in the other direction.
The mechanism consists chiefly of a main toothed wheel mounted on a spindle
provided with an outer milled head or handle and between the main wheel and the
corresponding inner face of the framing is arranged on the spindle so as to be
capable of oscillating on it, a plate of suitable shape and a spring blade resting
against the toothed wheel and a screen forming the inner end of the spindle and
tending to keep the plate and the main toothed wheel in close contact so as to
produce sufficient friction between them to cause the plate to participate in the
movement of the wheel when the latter is caused to rotate by turning the knob
on its spindle.
The plate carries two small toothed wheels rotating about fixed spindles secured
to the plate. These two wheels are arranged to be in constant engagement with

page_text: the main wheel and so that when the plate is brought into a certain position one
of its wheels engages simultaneously with the main gear and with its corresponding
wheel on one of the rollers the other wheel engaging only with the main wheel
but being out of engagement with its corresponding wheel on the other roller.
The plate being turned in the opposite direction the toothed wheel which was
engaged with its corresponding wheel on the roller will become disengaged from it
whilst remaining always in engagement with the main wheel while the other
wheel also still in engagement with the main wheel is caused to engage with the
corresponding wheel on the other roller with which it has been previously out of
engagement.
In the first case the movement communicated to the milled head is transmitted
by the main toothed wheel to that roller which is connected to it by the correspond-
ing toothed wheels and in the second case the other roller is driven.
The movement of the plate carrying the toothed wheels is preferably limited by
two stops arranged in the desired position on the framing and regulating the move-
ment of said plate so that the engagement of the toothed wheels mentioned takes
place under the most favourable conditions.
It will be understood from the preceding that by turning the milled head in
one direction the plate will be caused to move in the same direction owing to the
friction between the main wheel and said plate produced by the spring and con-
sequently the movement of the main wheel will be transmitted to the roller
desired by the engagement of one of the toothed wheels on the pivotted plate with
the toothed wheel of the corresponding roller. By turning the milled knob in
the opposite direction the plate is caused to turn in the same direction, the result
of which will of course be the disengagement of the roller previously driven and
the engagement of the toothed wheel corresponding to the other roller to which
its rotary motion will be thus transmitted.
Either of the rollers may be thus driven according to requirement or wish by
turning the milled knob in one or in the other direction and as owing to the
arrangement described the movements of the rollers take place in opposite direc-
tions the result will be that it will be possible to wind the band round one or
other of the rollers as desired, the roller on which the band is being wound up
being driven while the other from which the band is being unwound is out of
driving contact.
D
1
MOLL
JP
1007
BOULT & WADE,
Agents for the Applicant.
A communication from FERDINAND BELLET, Engineer, of 42, Boulevard Bonne
Nouvelle, Paris, in the Republic of France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a new device for transmitting movement by means of
oscillating toothed wheels and is applicable generally to all apparatus in which
a film, band, ribbon or the like is to be moved or wound up in one or the other
direction, such for instance as roller-devices for photographic stereoscopic or pano-

page_text: ramic apparatus stereoscopes, graphoscopes, magic lanterns, projecting lanterns,
registering apparatus, typewriters and for similar purposes.
In the accompanying drawing the device according to the present invention is
shown by way of example as applied to a roller frame,
Fig. 1 showing a roller frame in front elevation, and
Fig. 2 in vertical cross section on the line Y Y of Fig. 1.
The band A which it may be desired to move alternately in one or in the other
direction, according to the wish of the operator, may be a paper band, a photo-
graphic film or any other flexible sheet which is capable of being rolled up.
Said band A in the example shown in the drawing is capable of being alter-
nately wound up on two rollers B and C which are rotatable on their parallel
spindles supported in a framing D. The rollers B C of wood, metal or any other
suitable material may be provided at each of their ends with flanges E serving to
guide the band A.
Each roller B C carries at one of its extremities a toothed wheel F, G which
when rotated causes its corresponding roller to rotate; the other ends of said
rollers B C are preferably acted upon by small spring blades H I pressing against
the framing D and serving to produce sufficient friction to prevent the rollers from
rotating except when they are rotated by the operator.
On the side of the framing 1) at which are supported the ends of the rollers BC
carrying the toothed wheels F G is arranged the mechanism according to the
present invention enabling the operator to actuate one or other of the rollers BC
as desired by simply turning a central milled knob J or handle in one or in the
other direction.
The mechanism consists chiefly of a main toothed wheel K mounted on a
spindle L provided with an outer milled head or handle J and between the main
wheel K and the corresponding inner face of the framing D is arranged loosely
on the spindle L so as to be capable of oscillating on it, a plate M of suitable shape;
a spring blade N bearing against the toothed wheel and a screw O forming the
inner end of the spindle L tending to keep the plate M and the main toothed
wheel K in close contact so as to produce sufficient friction between them to cause
the plate M to participate in the movement of the wheel K when the latter is
caused to rotate by means of the knob J.
The plate M carries two small toothed wheels PQ rotating about fixed spindles R
and S secured to the plate. These two wheels are arranged to be in constant
engagement with the main wheel K so that when the plate M is brought into a
certain position, one of its wheels P or Q engages simultaneously with the main
gear K and with its corresponding wheel F or G on one of the rollers B or C,
the other wheel engaging only with the main wheel K but being out of engage-
ment with its corresponding wheel F or G on the other roller.
Upon turning the plate M in the opposite direction the toothed wheel P or Q
which was engaged with its corresponding wheel F or G on the roller, will become
disengaged from it whilst remaining always in engagement with the main
wheel K, while the other wheel-also still in engagement with the main wheel K-
will be caused to engage with the corresponding wheel F or G on the other roller
with which it had been previously out of engagement.
In the first place the movement communicated to the milled head J is trans-
mitted by the main toothed wheel K to that roller For G which is connected to
it by the corresponding toothed wheels, and in the second case the other roller is
driven.
The movement of the plate M carrying the toothed wheels P and Q is preferably
limited by stops T U arranged in the desired position on the framing D thereby
regulating the movement of said plate M so that the engagement of the
toothed wheels mentioned takes place under the most favorable conditions.
It will be understood from the preceding that by turning the milled head J
in one direction the plate M will be caused to move in the same direction, owing
to the frictional engagement between the main wheel K and said plate, produced

page_text: by the spring N and consequently the movement of the main wheel will be trans-
mitted to the roller desired by the engagement of one of the toothed wheels P
or Q on the pivotted plate with the toothed wheel of the corresponding roller B or C.
By turning the milled knob J in the opposite direction the plate M is caused to
turn in that direction the result of which will, of course, be the disengagement
of the roller previously driven and the engagement of the toothed wheel P or Q
corresponding to the other roller to which its rotary motion will be thus
transmitted.
Either of the rollers B and C may be thus driven according to requirement or
wish by the milled knob J in one or in the other direction and, as owing to the
arrangement described and illustrated, the movements of the rollers takes place
in opposite directions, the result will be that it will be possible to wind the band
round one or the other of the rollers, as desired, the roller on which the band is
being wound up being driven while the other from which the band is being un-
wound is out of drawing contact.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondent and in what
manner the same is to be performed, I declare that what I claim is:
―
1. A transmission device applicable generally to apparatus in which a film,
band or ribbon is to be moved from one roller to another in one or in the other
direction comprising a main driving wheel and two wheels gearing with same
and carried on a plate capable of oscillating on the main spindle so as to enable
either of the two independent rollers provided with toothed wheels to be driven,
by communicating to them rotary motion in directions opposite to each other, by
throwing them automatically in or out of gear by rotating the main driving
spindle in one or the other direction substantially as described.
2. A transmission device comprising a main driving spindle L provided with
a disc head J a toothed wheel K fast on said spindle and a plate M mounted loosely
thereon, and pressed against the toothed wheel K by a spring, said plate partici-
pating in the motion of the spindle L in either direction and causing, by its move-
ment one of the toothed wheels P or Q which it carries at its ends, to engage with
corresponding toothed wheel carried respectively by the spindle to be rotated, said
engagement taking place automatically, the opposite toothed wheels being at the
same time automatically disengaged substantially as described.
3. The combination and arrangement of parts constituting the complete trans-
mission device substantially as described and illustrated in the accompanying
drawings.
71000