Year: 1897

page_text: 1, JUHLANN MULL, 120,
hereby declare the nature of this. invention to be as follows:
The apparatus which forms the object of the present invention is intended. to
turn the pins and the interior sides of crank's webs in the construction of closed
crankshafts.
The apparatus is composed of a fixed ring attached to the support of the lathe
by means of a prop. moulded against it.
Inside this fixed. ring a movable ring slides, propelled by a rotary motion and
guided inside the fixed ring by a dove-tail attached to it, the movable ring being.
worked by a toothed wheel moulded on to it and put into gear. by a motive pinion.
secured to the exterior.
The movable ring turning in the large fixed ring has two crossbars placed
parallel of each other. and. forming the supports of two toolholders and turning
together with the movable ring around the crankshaft which is firmly fastened.
between the points of the lathe, and remains motionless whilst the tools turn;
these may be tightened in any required direction.
The toolholders are displaced on their cross-bar supports automatically in pro-
portion with the progress of the operation, by two threaded spindles, upon which
the toolholders act as nuts; these two threaded spindles being terminated at their
exterior extremities by ratchet-wheels, the teeth of which are struck at each rota-
tion of the movable ring by a peg fastened to the fixed ring thus imparting a certain
rotation to the spindles and a progress in proportion with the tools on the pin or
surface to be turned.
At the upper part of the apparatus there is an oil-cup containing the necessary
oil for lubricating the sliding surface between the dovetail of the fixed. ring and
the movable ring.
Dated this 20th day of April 1897
L. DUVINAGE,
Agent for Applicant.

page_text: Improvements in and relating to Lathes.
I, JOHANN MOLL, of 25, Lindenstrasse, Augsburg, Germany, Mechanician, 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:
-
The present invention concerns an apparatus for turning the crank pins of crank
shafts, the rough piece being firmly fixed between the points on the lathe, whilst
the turning-tools circulate around it. This apparatus differs from those of the
same kind inasmuch as, in addition to the turning of the crank pins the plane
surface of the interior sides of the crank web can be faced.
In the annexed drawing the apparatus is represented by Fig. 1, a front view,
Fig. 2 a plan view, Fig. 3 a vertical section.
a is a ring provided with a foot cast with it and which is screwed or bolted upon
the carriage of the lathe.
In this ring a a second ring b is rotatively fixed, guided by a dove-tail of the
ring a and put into rotation by a spur wheel ce with which it is provided and by
two cog-wheels d d gearing with this spur wheel (or in the place of this, by a
cog-wheel do) supported by an axle e worked by a transmission.
In the interior of the ring b, two cross-pieces f f are placed, upon which two
supports g g¹ rest which can be displaced and regulated upon the cross-pieces by
means of threaded spindles h h¹. For this purpose these spindles are provided
with star wheels or stars i.
To the outside ring a is fixed in a support a catch j against which the arms of
the star wheel strike alternatively at the rotation of the interior ring, which causes
a rotation of the threaded spindles h h¹, and consequently a forward movement-
continuous and automatic of the supports g g¹ upon the cross-pieces f f¹. This
mechanism is specially used when facing the webs, the catch being preferably
dispensed with when turning the crank pins.
Above the centre an automatic lubricator k is fixed, upon the ring a.
When this apparatus is in operation the piece to be worked is fixed in the centre
of the apparatus and set firmly between the points of the lathe. Afterwards the
ring bis put into rotation with the supports and the turning-tools and the attack
of the latter is automatically regulated by the threaded spindles h h¹.
For facing the webs, the carriage of the lathe is first stopped, the cutting tools
are arranged parallel with the supports g gl, by means of any known tool holding
device, the cutting edges of the tools being turned towards the web to be faced and
the facing is proceeded with like for the turning of the crank-pin except that the
carriage of the lathe remains immovable till the facing is perfected.
This apparatus offers the following advantages over the processes hitherto
employed for turning the crank-pins:
1. The crank shaft has no need to be fixed eccentrically with the lathe.
2. No eccentricity can be produced with cranked shafts of large dimensions and
consequently the crank pins to be turned will be exactly round.
3. The operation which is so difficult and so long for setting the cranks in
equilibrium, with heavy weights, and the danger resulting therefrom of being
struck, during the rotation of the axle, by a piece breaking loose from these weights
are completely avoided; the consequence is, not only an economy of time and
money, but also a greater security for the workmen during the work.
4. The apparatus can be moved backward and forward with the sliding-carriage
in the same direction and the crank shaft being immovable between the two points
of the lathe, it is consequently possible to obtain an absolutely parallel turning.

page_text: 5. The plane surface (interior sides) of the crank web can be faced with this
apparatus, as well as the turning of the crank pins.
6. With this apparatus which serves to turn the crank pins and to face the
interior of the webs, other articles can very easily be worked also, for instance
turning and thinning of the flanges of iron pipes (especially those of large diameter).
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. An apparatus for turning the crank-pins and interior sides of crank-webs,
in the construction of closed crank-shafts, distinguished by the arrangement of
a ring b, moving in a ring a fixed upon the sliding carriage of the lathe, upon
which ring 6 two parallel cross-pieces f fl are fixed, with supports g g turning
when the ring b turns about the crank pin as a centre, the shaft or axle being sup-
ported by the lathe centres, the supports turning with their tools, these latter being
tightened according to the directions desired for the crank-pins and the surface
of the crank webs, the supports with the tools being displaced upon the cross-
pieces ff by means of two threaded spindles moving automatically.
2. An improvement in lathes consisting in the combination with the sliding
carriage of a lathe of an apparatus for turning the crank pins and interior sides of
crank shafts substantially as described and shown.
Dated this 19th day of January 1898
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.