Improvements in or connected with Turret and Capstan Lathes.
Year: 1899

page_text: F
PROVISIONAL SPECIFICATION.
Improvements in or connected with Turret and Capstan Lathes.
I, HERBERT AUSTIN, Works Manager to the Wolseley Sheep Shearing Machine
Company, Limited, of Sydney Works, Alma Street, in the City of Birmingham,
Manufacturers, do hereby declare the nature of this invention to be as follows;-
This invention has for its object to turn or drill, by means of a tool or tools
carried by the turret or capstan, the metal which is to be operated upon in a
turret or capstan lathe, at a velocity of revolution of the lathe spindle which
would cause excessive or undue wear of corresponding screwing or tapping
tools brought to operate against the metal, and to screw or tap such metal by
means of a tool or tools carried by the turret or capstan at a lower velocity of
revolution of the spindle, that is to say, at a velocity which will avoid the ex-
cessive or undue wear of a tool which is frequently found to result when running
the lathe spindle for screwing or tapping purposes at the higher velocity which
is most suitable for turning or drilling purposes.
According to a convenient method of providing for the two different speeds
of the lathe spindle, the spindle has a fast pulley mounted thereon between two
loose pulleys of the same diameter, and is driven from a counter-shaft on which
are mounted two pulleys, one of which is larger in diameter than the other. The
pulleys on the counter-shaft are of such width, and in such position in relation
to the pulleys of the spindle, that either of the belts may be brought from a
loose pulley of the spindle onto the fast pulley of such spindle, as desired, the
other belt being moved from the fast pulley onto the other loose pulley.
When a screwing tool of the ordinary character is carried by the turret or
capstan, or when a tapping tool is carried thereby, the quick or turning, or
drilling, speed of the lathe spindle is, of course, in the reverse direction to the
slower or screwing, or tapping, speed, as it is utilized also in ensuring the
quick return of the screwing or tapping tool; and, in the driving arrangement
described in the last preceding paragraph, this is provided for by using one of
the belts open and the other crossed. The turning or drilling tool which is
carried by the turret or capstan is set to cut the opposite hand to that which the
screwing, or tapping tool cuts, and thus in the same turret or capstan a set of
tools is carried of which one or some of them, namely that or those which are
to be used for turning or drilling, or turning and drilling, are adapted to cut in
one direction, and the other or others, namely that or those which are to be
used for screwing or tapping, or for screwing and tapping, are adapted to cut
in the opposite direction."
If, however, a screwing tool is carried by the turret or capstan which is adapted
to open out from the metal after screwing, the quick speed of the lathe spindle
may be in the same direction as the slower speed, in which case the turning tool

page_text: or tools carried by the turret or capstan will be adapted to cut the same hand as
the screwing tool.
Any convenient means other than those above described may be used to give
the two different speeds of revolution to the lathe spindle.
-
Dated this 11th day of September 1899.
STEPHEN. WATKINS & GROVES,
Wolverhampton, Agents for the Applicant.
Improvements in or connected with Turret and Capstan Lathes.
I, HERBERT AUSTIN, Works Manager to the Wolseley Sheep Shearing Machine
Company, Limited, of Sydney Works, Alma Street, in the City of Birmingham,
Manufacturers, 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 has for its object to turn or drill, or turn-and drill, by means of
a tool or tools carried by the turret or capstan, the metal which is to be operated
upon in a turret or capstan lathe, at a velocity of revolution of the lathe spindle
which would cause excessive or undue wear of corresponding screwing or tap-
ping, or screwing and tapping, tools brought to operate against the metal, and
to screw or tap, or screw and tap, such metal by means of a tool or tools carried
by the turret or capstan, at a lower velocity of revolution of the spindle, that is
to say, at a velocity which will avoid the excessive or undue wear of a tool which
is frequently found to result when running the lathe spindle for screwing or
tapping purposes at the higher velocity which is most suitable for turning or
drilling purposes.
According to a convenient method of providing for the two different speeds
of the lathe spindle, the spindle has a fast pulley mounted thereon between two
loose pulleys of the same diameter, and is driven from a counter-shaft on which
are fixed two pulleys, one of which is larger in diameter than the other. The
pulleys on the counter-shaft are of such width, and in such position in relation
to the pulleys of the spindle, that either of the belts may be brought from a
loose pulley of the spindle onto the fast pulley of such spindle, as desired, the
other belt being moved from the fast pulley onto the other loose pulley.
When a screwing tool of the ordinary character is carried by the turret or
capstan, or when a tapping tool is carried thereby, the quick or turning, or
drilling, speed of the lathe spindle is, preferably, in the reverse direction to the
slower or screwing, or tapping, speed, and' is utilized in causing the quick return
of the screwing or tapping tool. This is provided for by using the mechanism
above described with one of the belts open and the other crossed. Any turning
or drilling tool which is carried by the turret or capstan is, when the two different
speeds are in the reverse direction, set to cut the opposite hand to that which
the screwing, or tapping, tool cuts, and thus in the same turret or capstan a
set of tools is carried of which one, or some of them, namely, that or those which
are to be used for turning or drilling, or turning and drilling, are adapted to
cut in one direction, and the other or others, namely, that or those which are
to be. used for screwing or tapping, or for screwing and tapping, are adapted to
cut in the opposite direction.
If, however, no tapping tool is carried by the turret or capstan, but a screwing

page_text: tool is carried thereby, which is adapted to open out from the metal after screw-
ing, the quick speed of the lathe spindle may, conveniently, be in the same
direction as the slower speed, in which case the turning tool or tools and any
drilling tool or tools carried by the turret or capstan will be adapted to cut the
same hand as the screwing tool.
Any convenient means, other than those above described, may be used to give
the two different speeds of revolution to the lathe spindle.
The accompanying drawing illustrates, in side elevation, the convenient
method described above by which the two different speeds of the lathe spindle
may be provided for, for the purpose above shewn.
Upon the lathe spindle A is fixed a pulley B, and on opposite sides of this
pulley there are mounted, to turn loosely upon the spindle A, pulleys C C
These three pulleys are all of the same diameter. Two pulleys D and E, of
different diameters corresponding to the difference required in the two speeds,
are fixed upon the overhead or counter shaft F. The belt which passes around
the pulley D may be moved from the pulley C onto the pulley B, and back again;
and the belt which passes around the pulley E may be moved from the pulley C¹
onto the pulley B, and back again;, and thus the pulley B may be driven from
either the larger pulley D or from the smaller pulley E, and the two speeds at
which, alternatively, the pulley B is capable of being driven, may be either in
the reverse direction to one another, by having one of the belts open and the
other crossed, or may be in the same direction, as required. The belts may be
moved across the pulleys D E by means of the belt guides a a¹ carried in the
upper or outer ends of levers G G¹ which are fulcrummed at b6 and which
carry, at the ends of portions which are extended below or beyond their fulcrums,
anti-friction rollers c c¹. The guides are operated by means of cam-pieces d d',
which are adjustably fixed to revolving discs H H fixed upon a shaft J which
may conveniently be the under-shaft of the lathe which carries the cam for
operating sideway cutting tools, when such are required. The cam-pieces d d',
are preferably, set so that one of the belts is moved from off the pulley B
before the other belt is moved thereonto; and two of these cams are, of course,
fixed to each disc, namely, one to move the corresponding belt from off the
pulley B and the other to move it thereonto. Portions of the levers G G¹, and
of the downward extensions thereof, are shewn as broken away to expose the
parts behind, and the outlines of these broken away portions are indicated by
broken lines.
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 turret or capstan lathe provided with mechanism by means of which a
tool or tools carried by the turret or capstan operate to turn or drill, or turn and
drill, the metal which is being operated upon, at a higher velocity than the
velocity with which corresponding screwing or tapping, or screwing and tapping,
tools, carried by such turret or capstan, operate upon such metal, substantially
as described.
2. A turret or capstan lathe of which the turret or capstan carries a set of
tools for turning or drilling, or turning and drilling, and for screwing or tapping,
or screwing and tapping, of which one, or some of them, namely, that or those
which are to be used for turning or drilling, or turning and drilling, are adapted
to cut in one direction, and the other or others, namely, that or those which are
to be used for screwing or tapping, or for screwing and tapping, are adapted to
cut in the opposite direction, in combination with means by which the lathe
spindle is driven at a higher velocity when a turning or drilling tool is operating
upon the metal than when a screwing or tapping tool is operating thereon, and
in the reverse direction, substantially as described.
3. The means by which the two different velocities of revolution may be given

page_text: to the lathe spindle of a turret or capstan lathe, and by which, if required, the
spindle may be driven in the opposite direction when running at the higher
speed to that when running at the lower, substantially as described, for the pur-
pose or purposes set forth.
Dated this 9th day of June 1900
STEPHEN WATKINS & GROVES,
Chartered Patent Agents Wolverhampton.
Agents for the Applicant.