Improvements in Lathes.
Year: 1898

page_text: Improvements in Lathes.
I, JASPER WETTER, Patent Agent, of 37 & 39, Essex Street, Strand, in the County
of London, do hereby declare the nature of this invention (a communication from
Julius Wilhelm von Pittler, Mechanical Engineer, of Gohlis, near Leipzig, in the
Kingdom of Saxony), to be as follows:-
This invention relates to a "foriner" lathe, in which the slide is capable of
oscillating about the lathe bed or cheek and adapted to carry one or more forming
tools, that is to say one or more steel cutters or chisels of special shape, corresponding
to that of the articles to be turned on the lathe.
In the accompanying drawings:
:-
Fig. 1 is a longitudinal section of a lathe slide or toolholder embodying my
invention; Fig. 2 is a cross section of the lathe bed and elevation of the slide;
Fig. 3 is a side view of the entire lathe, and Fig. 4 an end view of the same.
The slide a is adapted to turn on the cylindrical lathe-bed 6 and is guided
between two rings c and d. The cutting tools z and ¹ corresponding in shape to
the article to be turned, are mounted on the slide a in front and at the back of the
piece of work x.
The lower part of the slide is provided with a toothed segment a¹, gearing into a
worm e which serves to turn the slide about the bed b and may be set in motion
either by hand, by means of a shaft f¹ and star-wheel f, or automatically from the
driving shaft 1 of the lathe by means of the belt pulleys 2 and 3, intermediate shaft g,
worm h, worn wheel h¹, friction coupling and shaft f¹. The worm wheel h¹ is
adapted to turn on the shaft f¹ and may be coupled with the same, when required,
by means of a hand-lever k, coupling rod l, lever m, coupling spindle n and friction
coupling i.
The lower part or downward extension of the slide a has a pair of circularly curved
slots o and o, through each of which passes a stop pin p. These serve to limit the
when
motion of the slide a by the impact of the said pins p with the stop bolt
the slide a is moved by hand. When the movement of the slide is automatic, the
automatic disconnection is caused by one of the pins p, which strikes against the
lever and thereby imparts to the bolt 1 and the stop lever a short turning
motion, in consequence of which the projection 111 of the stop lever 11 releases the
lever k, and the helical spring sets the rod / together with lever m and core n in
motion, so as to release the friction coupling i.
The drawings represent the lathe in use for turning the hub x of a cycle wheel, in
which case it is desirable to perform the operations of boring and turning at the
same time. For this purpose the boring tool or drill receives rotary motion from the
lathe spindle 1 through the intermediary of chain wheels 5 and 6, spur wheels 7
and 8, intermediate shaft 9, chain-wheels 10 and 11, and spindle 12. The feed
motion of the boring tool may be produced by hand by means of the star-wheel 13
or automatically.
hine marke us follows_

page_text: The rod of metal to be operated upon is thrust through the bore of the lathe
spindle 1, until it comes in contact with the stop, after which it is clamped fast by
means of the lever 14 acting on the chuck in the spindle bearing. Subsequently the
slide a is turned about the bed b by means of the starwheel f, shaft f¹ and worin e,
so that the front cutting tool z approaches the piece of work e, then the lever is
drawn forward in order to connect the worm-wheel h with the worm shaft f¹, so that
the rotary motion of the slide a about the bed will take place automatically. The
lever is now maintained in its position by the lug 11 of the lever 11. The slide a
continues to turn about the bed b, until the stop pin p comes in contact with the
lever "', in consequence of which (as mentioned above) the wornwheel is
disengaged from the coupling i and the automatic motion ceases.
The slide is now turned back by means of the handwheel f, the finishing
cutter z¹ is caused to approach the piece of work x, which lias been shaped roughly
by the roughing tool z, and the turning of the piece is completed.
Thereupon the piece x is separated from the remainder of the bar of raw material
by turning the lever 15 of the cutting-off mechanisın 16.
If the piece of work a is not only to be "formed" or turned to the required shape
externally by means of forming tools, but also bored out, the boring apparatus is set
in action, either before or during the operation of the roughing cutter.
Dated this 15th day of June 1898.
Improvements in Lathes.
I, JASPER WETTER, Patent Agent, of 37 & 39, Essex Street, Strand, in the
County of London, do hereby declare the nature of this invention, a communication
from Julius Wilhelm von Pittler, Mechanical Engineer, of Gohlis, near Leipzig, in the
Kingdom of Saxony, and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement :-
"
This invention relates to
at "former lathe in which the slide is capable of
oscillating about a round lathe bed or pivot and adapted to carry one or more forming
tools, that is to say one or more steel cutters or chisels of special shape, corresponding
to that of the articles to be turned on the lathe.
In the drawings filed with the provisional specification :-
Fig. 1 is a longitudinal section of a lathe slide or tool holder embodying the
invention;
Fig. 2 is a cross section of the lathe bed and elevation of the slide;
Fig. 3 is a side view of the entire lathe, and
Fig. 4 an end view of the same.
The slide a is adapted to turn on the cylindrical lathe bed 6 and is guided between
two rings c and d. The cutting tools and corresponding in shape to the article to
be turned, are mounted on the slide a in front and at the back of the piece of
work x.
The lower part of the slide is provided with a toothed segment a³, gearing into a
worm e which serves to turn the slide about the bed b and may be set in motion
either by hand, by means of a shaft and star-wheel f, or automatically from the
driving shaft 1 of the lathe by means of the belt pulleys 2 and 3, intermediate shaft g,
wortn h, worm wheel h¹, friction coupling i and shaft f. The worm wheel h¹ is
adapted to turn on the shaft f¹ and may be coupled with the same, when required,

page_text: by means of a hand lever k, coupling rod 1, lever m, coupling spindle n, and friction
coupling i.
9,
The lower part or downward extension of the slide a has a pair of circularly curved
slots o and o¹, through each of which passes a stop pin p. These serve to limit the
motion of the slide a by the impact of the said pins p with the stop bolt when
the slide a is moved by hand. When the movement of the slide is automatic, the
automatic disconnection is caused by one of the pins p, which strikes against the
lever and thereby imparts to the bolt 1 and the stop lever a short turning
motion, in consequence of which the projection of the stop lever releases the
lever k, and the helical spring sets the rod, together with the lever m and core,
in motion, so as to release the friction coupling i.
The drawings represent the lathe in use for turning the hub of a cycle wheel, in
which case it is desirable to perform the operations of boring and turning at the same
time. For this purpose the boring tool or drill receives rotary motion from the lathe
spindle through the intermediary of chain wheels 5 and 6, spur wheels 7 and 8,
intermediate shaft 9, chain wheels 10 and 11, and spindle 12. The feed motion of
the boring tool may be produced by hand by means of the star wheel 13, or
automatically.
The machine works as follows:-
The rod of metal to be operated upon is thrust through the bore of the lathe
spindle 1, until it comes in contact with the stop, after which it is clamped fast by
means of the lever 14 acting on the chuck in the spindle bearing. Subsequently the
slide a is turned about the bed & by means of the star wheel, shaft fi and worm e,
so that the front cutting tool z approaches the piece of work , then the lever / is
drawn forward, in order to connect the worm wheel h¹ with the worm shaft f¹, so that
the rotary motion of the slide a about the bed b will take place automatically. The
lever is now maintained in its position by the lug 11 of the lever 11. The slide a
continues to turn about the bed b, until the stop pin p comes in contact with the
lever r, in consequence of which, as mentioned above, the worm-wheel h¹ is disengaged
from the coupling i and the automatic motion ceases.
The slide a is now turned back by means of the handwheel f, the finishing cutter cl
is caused to approach the piece of work æ, which has been shaped roughly by the
roughing tools, and the turning of the piece is completed.
Thereupon the piece x is separated from the remainder of the bar of raw material,
by turning the lever 15 of the cutting-off mechanism 16.
If the piece of work is not only to be "formed" or turned to the required shape
externally by means of forming or profiling tools, but also bored out, the boring
apparatus is set in action either before or during the operation of the roughing
cutter.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. A "former" lathe comprising in its construction a tool holder mounted on a
round lathe bed or pivot, so arranged that by turning the toolholder on the said
lathe-bed or pivot, the tools may be caused to approach the piece of work and to act
on the same without the use of a cross slide.
2. A former " lathe constructed and adapted to operate substantially as described
and shown by the drawings.
FAIRFAX & WETTER,
Agents, 37 and 39, Essex Street, Strand, London.