Improvements in Portable Engines for Operating Ploughs.
Year: 1898

page_text: Improvements in Portable Engines for Operating Ploughs.
I, GEORGE WOOLNOUGH, Engineer, at Halberstadt, in the Kingdom of Prussia,
in the Empire of Germany, do hereby declare the nature of said invention to be
as follows:
-
In portable engines for operating ploughs comprising a cord or rope drum or
barrel, attached to one side of the engine, the cord or rope does not pass over the
barrel direct, but is first conducted over a pulley provided on the tender or tank;
which pulley by causing that portion of the cord or rope on the side thereof to
pass at an angle of 90° to that on the other side, places the same in the winding
plane lying in the longitudinal direction of the machine.
In cord winding mechanisms, as usually arranged, the crank shaft by means of
its toothed wheel actuates the toothed rim of the side drum, which is secured to
the boiler. The cord passing from the plough over a pulley mounted upon a
vertical shaft, is thus left in its original plane, and at a point almost diametrically
opposite the crank-shaft, it winds on the drum. Owing to this circumstance, the
barrel-shaft sustains practically the aggregate sum of the pressure of the toothed
gearing and the cord tension occurring between the toothed wheel of the crank-
shaft and the toothed rim of the drum, which, besides producing increased friction
and wear, is undesirable on account of the great strain to which the boiler-wall
is subjected in consequence.
By the present invention this difficulty is overcome; the point where the cord
winds upon the barrel or drum being located close to the crank shaft. To this
end, the cord pulley is inclined at a somewhat acute angle, while the direction in
which the cord winds on the drum is reversed correspondingly. The cord is wound
upon the drum or barrel practically in the direction of the tangent common to
both the driving wheel and the driven toothed wheel, between the centres of the
two wheels; all this for the purpose of reducing the strain upon the drum shaft
or spindle.
In order to facilitate a quick and easy changement in the speed of the rope (this
being rendered necessary or desirable by distinct kinds of the ground or soil to be
treated, or by the peculiarity of the agricultural implements used) the drum carry-
ing the driving rope, is supported by means of an excentrical socket arranged on a
pivot fixed to the boiler, so as to be capable to turn round said pivot, whereby the
distance between the geometrical centre of the driving wheel and of the driven
toothed wheel combined with the drum is diminished or increased and which permits
the driving wheel to be changed, if required, against another of a smaller or a
larger diameter, imparting a higher or smaller speed to the drum.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Die Augenes for Operating Plougns.
I, GEORGE WOOLNOUGH, of Halberstadt, in the Kingdom of Prussia, Empire of
Germany, Engineer, 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 portable engines for operating ploughs comprising a cord or rope drum or
barrel, attached to one side of the engine, the cord or rope does not pass over the
barrel direct, but is first conducted over a pulley provided on the tender or tank:
which pulley by causing that portion of the cord or rope on the side thereof to
pass at an agle of 90° to that on the other side, places the same in the winding
plane lying in the longitudinal direction of the machine.
In the accompanying drawing,
Figure 1 represents the cord-winding mechanism as usually arranged.
The crank-shaft A, through the medium of its toothed wheel B, actuates the
toothed rim C of the side-drum D, which is supported. by the carrying spindle a
secured to the boiler. The cord G, extending from the plough to the point F of
the pulley H, which is mounted upon a vertical shaft, is thus left in its original
horizontal plane, and at a point almost diametrically opposite to the crank-shaft,
it winds on the drum. Owing to the last named circumstance, the barrel-shaft
sustains practically the aggregate sum of the pressure of the toothed gearing and
the cord tension, occurring between B and C, which, besides producing increased
friction and wear is undesirable on account of the great strain to which the boiler-
wall is subjected in consequence.
By the present invention this difficulty is overcome, the point where the cord
winds upon the barrel or drum being located close to the crank shaft. To this
end, the cord pulley H is inclined at a somewhat acute angle, while the direction
in which the cord winds on the drum D is reversed, as illustrated in Figure 2 of
the drawings. The cord is wound upon the drum or barrel practically in the
direction of the tangent common to both the driving wheel and the driven toothed
wheel between the centres of the two wheels.
From the diagrams Figures 3 and 4 it will be seen that a diminution is effected
by this improved arrangements in the strain put upon the drum or barrel shaft;
Figure 3 referring to the old construction, while Figure 4 is a corresponding re-
presentation of the novel mechanism. According to these figures, the pressure of
the toothed gearing, Z, and the cord tension S, are transmitted to the centre of
the drum-spindle a-which is the point receiving the initial impulse-so that,
while there occurs a mutual elimination of the respective double forces, a resultant
pressure P is brought to bear upon the drum spindle or shaft a; which pressure,
in the case of Figure 4, is only about 1% of what it is in the example given in
Figure 3.
In order to facilitate a quick and easy changement in the speed of the rope (this
being rendered necessary or desirable by distinct kinds of the ground or soil to
be treated, or by the peculiarity of the agricultural implements used) the drum
carrying the driving rope is supported by means of an eccentric socket arranged
on a pivot fixed to the boiler, so as to be capable to turn round said pivot, whereby
the distance between the geometrical centre of the driving wheel and of the driven 4
toothed wheel combined with the drum is diminished or increased and which per-
mits the driving wheel to be changed if required, against another of a smaller or
a larger diameter imparting a higher or smaller speed to the drum.
On the pivot a, Figure 2, fixed to the boiler is arranged the eccentric socket b,

page_text: which carries the drum or barrel D with toothed rim 1, Figure 5. The socket is
provided with a flange c¹, which flange corresponds with the flange of the
cap d, which by means of the bolt e is firmly secured to the pivot.
Presuming that for instance 3 different speeds should be used and that for
that purpose 3 driving wheels B with say 10, 11 and 12 teeth, respectively, are
provided for being keyed on the crank shaft A, it is of course necessary to increase
the distance between the geometrical centre of the driving wheel B and the
driven toothed wheel C whenever the driving wheel having 10 teeth is to be
replaced by one having 11 or 12 teeth, Figures 6, 7 & 8. If now one wheel is to
be exchanged against one having a greater number of teeth, or less teeth, it is
only necessary to withdraw the screws s¹ s2, and to turn the eccentric socket b,
Figure 2 and 5, the degree of eccentricity of which is made to correspond to the
diameter of the different driving wheels. This can be done without any trouble
by turning the drum in that direction in which the pawl 9 of the drum brake
rotates the ratchet wheel h keyed on the socket 6, whereby the excentrical socket
is of course also turned. When the eccentric has assumed its proper position, it
is again firmly secured to the cap and the spindle by the screws st $3. The corres-
ponding wheel B may now be keyed on the crank shaft A.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:-
1. A steam plough engine provided with a winding drum or barrel on one side,
the main feature being that, in order to reduce the strain upon the drum shaft or
springle (a), the cord is made to wind upon the said drum or barrel practically in
the direction of the tangent common to both the driving wheel (B) and the
driven toothed wheel (C), between the centres of the two wheels, essentially as
described.
2. The arrangement of an eccentric socket (b) on the fixed pivot (a) of the drum
by means of which the distance between the geometrical centre of the driving
wheel and of the driven wheel may be diminished or increased, for the purpose of
permitting the driving wheel to be exchanged against another of smaller or larger
diameter, essentially as described.
Dated this 19th day of November 1898
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.