Improved Mechanism for the Transmission of rower.
Year: 1897

page_text: Date of Application, 28th Apr., 1897
Complete Specification Left, 27th Jan., 1898--Accepted, 28th Apr., 1898
i
Improved Mechanism for the Transmission of rower.
We, FRIEDRICH AHRENS, Plasterer, and MAX REH, Merchant, both of Luitpold-
strasse 8, Munich, in the Empire of Germany, do hereby declare the nature of
this invention to be as follows:-
--
This invention relates to a device for transmission of power, which is dis-
tinguished by the simplicity of its construction as by the surety of its action and
quiet working.
For this purpose the connecting rod connected with the driving device, or the
driving device whatever it may be, is connected to the lever arm of a pivoted
segment, or rocking beam on which two rods are articulated, which engage with
their eyes on two pins on a disk the axis of which is at a suitable distance from
the axis of the segment aforesaid. Thus according to the direction of the move-
ment of the lever arm these rods would tend to draw these disks forward or push
them back turning the disk itself in the one or other direction to cause such
disk to be always turned in the same direction, the rods are disengaged during
the return movement and are guided back in suitable guides so as to re-engage
the pins at the commencement of the next stroke.
There are two of these lever arms and gears which are moved in such a manner
by the driving power, for instance by a motor, that when the one lever arm goes
down, the other lever arm rises by means of a correspondingly arranged inter-
mediate gearing; each of the lever arms thus describes a quarter circle in the same
or parallel planes up and down, the proportion being such that by one rising and
sinking of both lever arms moving in opposite directions the shaft with the disks
thereon makes a complete revolution in one direction. Each lever arm can also
be moved for itself by a special connecting rod, in which case the said intermediate
gear is dispensed with. For the purpose of lifting the eyes of the rods from the
pins of the disks there are arranged corresponding guiding grooves in the disks
by the influence of which the lifting out as well as the reengagement of the eyes
on the pins is effected securely and exactly.
Improved Mechanism for the Transmission of Power.
We, FRIEDRICH AHRENS, Plasterer, and MAX REH, Merchant, both of Luitpold-
strasse 8, Munich, in the Empire of Germany, 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 a device for transmission of power, which is dis-

page_text: tinguished by the simplicity of its construction as well as by the surety of its
action and quiet working.
For this purpose the connecting rod connected with the driving device, or the
driving device whatever it may be, is connected to the lever arm of a pivoted
segment, or rocking beam on which two rods are articulated which engage with
their eyes on two pins on a disk, the axis of which is at a suitable distance from
the axis of the segment aforesaid. Thus according to the direction of the move-
ment of the lever arm these rods would tend to draw these disks forward or push
them back turning the disk itself in the one or other direction. To cause such
disk to be always turned in the same direction the rods are disengaged during
the return movement and are guided back in suitable guides so as to reengage
the pins at the commencement of the next stroke.
There are two of these lever arms and gears which are moved in such a manner,
by the driving power, for instance by a motor, that when the one lever arm goes
down, the other lever arm rises by means of a correspondingly arranged inter-
mediate gearing, each of the lever arms thus describes a quarter circle in the same
or parallel planes up and down, the proportion being such that by one rising and
sinking of both lever arms moving in opposite directions the shaft with the disks
thereon makes a complete revolution in one direction. Each lever arm can also
be moved for itself by a special connecting rod, in which case the said intermediate
gear is dispensed with. For the purpose of lifting the eyes of the rods from the
pins of the disks there are arranged inclines on the rods and for replacing them
pins thereon move in guiding grooves in the disks, by the influence of which the
reengagement of the eyes on the pins is effected securely and exactly.
In the annexed drawing,
Figs. 1 and 2 show the device for a motor in side and plan view respectively.
Figs. 3 and 4 show the same for driving a cycle in side and plan view.
Figs. 5 to 7 show the form and depth of the grooves effecting the guiding of
the rods.
The rods g, h, g' and h¹ are articulated at 12 3, and 4 on the segments d, d
pivoted on the shaft c this shaft is seated in the framing a, in which also is
seated the shaft 6 which is to be driven. Each segment is driven by the driving
means for instance the connecting rod of a machine or by rods, operated by tread-
ing levers, and for this purpose each segment provided with an arm e, and
respectively e¹. At the ends of these arms or rods for instance in the application
of the arrangement for cycles the pedals f, f' can be arranged (Figs. 3 and 4).
In order to raise for instance the arm e', when the arm e is sinking, the seg-
ments are provided with teeth which by means of a conical intermediary
gearing E (not shown in Figs. 1 and 3) are operatively connected with one
another.
The rods h, g, h¹ glare, as already mentioned, fixed however in such a manner
at 1, 2, 3, 4, on the segments d d' that they turn round their turning point and
can be lifted simultaneously from the segments. The same are however influenced
in such a manner by appropriate means for instance flat springs or in any other
suitable manner (not shown in the drawing) that their other ends, in or near which
are the eyes 11, 21, 31, 41, are always pressed against the disks k, in which the
same are guided.
Each disk kor k¹ has on the side facing the rods g h or g¹ h¹ two pins pro-
jecting from the disks diametrically opposite one another. On the same face of
each disk kk are two grooves m n substantially concentric with the disc. The
rods g h g¹ h¹ have in or near their ends eyes 11 21 31 4¹ respectively these eyes being
adapted to engage the pins 1 1, 1, 1. On the rod 9 near the eye l' is a pin o which
engages in the groove n. On the rod h is similarly a pin p which engages in the
groove m.
The rods g' h¹ have similar pins engaging respectively the grooves n m
of the disk k¹. The position of these pins is such with regard to the
grooves n m that as the disks k k¹ revolve and as each rod g h g¹ h¹ comes to the
position when it is to enter into respective engagement with its corresponding

page_text: pins or the eye of the rod is in alignment with the said pin. The depth of
each groove m n varies at different parts and when the pin moving in the groove
arrives in the said position in which the eye of the rod is in alignment with the
pin on the disk the pin on the rod will arrive in a depression in the groove which
will permit the eye of the rod to engage the pin on the disc. Having thus
brought the rod and disc into operative engagement (in which position the rod g
is shown in Fig. 1) it will be understood that a movement given to the rod g in a
suitable direction for instance by downward pressure of the sector d will cause
the disck and with it the shaft 6 to be revolved by the rod g until the end r of
this rod which has under it an inclined face crosses the edge of the disc k when
the inclined face aforesaid will ride up over the edge of the disc k and so lift the
rod I off the pin . By this time a quarter revolution will have been given to
the disck and the sector d will have completed one half of its downward stroke.
At this moment the other pin of the disk k will have arrived at about its lowest
position and the rod h will have been moved correspondingly downwards so that
the eye 2 coinciues with the pin and the pin p on the rod h now falling into a
depression in the groove m, the eye 21 will engage the pin l. During the remainder
of the downward stroke of the sector d the rod g will move idly while the rod h
drives the disck for a further quarter turn whereupon the incline 5 on the inside
of the rod will in a similar manner rise upon the edge of the disc k and lift the
eye of the rod h from the pin t.
During this downward movement of the sector d the sector d' will have risen
to its highest position and the rods g h will have moved idly, now the sector d'
commences to descend and a further half revolution is given to the shaft 6 through
the disc, hrstly by the rod y' and secondly by the rod h in an exactly summar
manner to that above described by the rods gh. During this downward movement
of the sector d the sector d will have risen and its rods g h will have moved idly,
since, until the pins o p arrive in their respective depressions, marked o' in
Fig. 5, the rods g h are supported by the said pins o p at such a distance from
the disck that the pins on the latter can pass freely under them. A complete
revolution of the disc k having brought the pin back to the position in Fig. 1
and the rod g having simultaneously again arrived in the same position its pin o
urops into the depression o¹ and the eye 11 engages the pin and the operation
is repeated.
Instead of arranging the rods g, h, on the outer side of the
disks k, k, the same may also be arranged on the inner side. In the form shown
in Figs. 3 and 4 the two disks k, k¹ are united in one of about double strength.
segments d, d¹ and
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed we declare that what we
claim is:-
An improved device for transmission of power, having disks k k¹ consisting of
one or two parts provided with grooves m and n and fixed on the axle to be driven
with the pins on which there engage alternately and successively the eyes 11, 21,
31, 4', of the rods g h g h' articulated on the oscillatory segments d d', whilst
inclines s provided on the rods lift the rods successively from the pins after each
quarter revolution of the disk k, and, when either segment d d is rising, the
rods g h or g¹ h¹ are kept above the pins l' by pins op guided in the grooves m n.
Dated this 27th day of January 1898.
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand, W.C., London,