Improved Construction and Arrangement of Turret Lathes.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improved Construction and Arrangement of Turret Lathes.
I, ALFRED GEORGE MELUUISH, Manager to Messrs. Wm. Cook & Co., Engineers,
Limited, of Gothic Works, Salamanca Street, Vauxhall Walk, London,
Machinists, Lathe, and Tool Manufacturers, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improved construction of turret lathe and consists
in arranging the operative parts in such a manner that any class of work can be
performed instead of being limited to rods of metal as hitherto has been the case,
the main principle being that according to my invention the tools revolve (instead.
of being stationary as is usual at present) and are driven positively and succes-
sively as they are severally presented to the work to be operated upon.
In carrying the invention into practice, I arrange a sliding saddle upon a
lathe bed for backward and forward motion by hand or automatically, and upon
this I mount a turret composed of 2, 3, or any number of faces, each of which
can carry a revolving mandrel, being in fact mandrel heads with their mandrels
radiating out from the common centre on which the turret turns, each mandrel
is preferably fitted with a worm wheel for engagement into a worm driven by a
belt from an overhead motion.
This worm is transversely arranged across the front of the revolving turret
but fixed to the sliding saddle, so that it moves with it, and being in front or
towards the front of the turret only that tool revolves that is presented to the
work.
Ordinary means are provided for feeding the saddle slide and turret forward,
but I prefer it to be done automatically by the pull of a dead weight, the slide
being returned for the turret to be revolved and locked in position by means of
a cam.
The position of the worm is so arranged that each mandrel as it is revolved to
bring a fresh tool to the front, gears into the worm, and the previous one leaves
the worm and remains idle till again brought round to the front for operation.
I may use crown and bevel gearing with the crown wheel either arranged
in the same plane as the bevel wheels or at an angle thereto, said crown wheel
being operated perhaps by a second shaft but the chief feature consists in
arranging revolving tools in a revolving and sliding turret and operated by means
preferably a worm on the sliding saddle and worm wheel on the mandrel.
Datod hie 13th day of Tal 1800

page_text: Improved Construction and Arrangement of Turret Lathes.
I, ALFRED GEORGE MELIUISH, Manager to Messrs. Wm. Cook & Co., Engineers,
Limited, of Gothic Works, Salamanca Street, Vauxhall Walk, London,
Machinists, Lathe and Tool 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 relates to an improved construction of turret lathe and consists
in arranging the operative parts in such a manner that any class of work can be
performed instead of being limited to rods of metal as hitherto has been the case,
the main principle being that according to my invention the tools revolve (instead
of being stationary as is usual at present) and are driven positively and succes-
sively as they are severally presented to the work to be operated upon.
My invention will be understood from the following description, aided by the
accompanying drawings, in which
Figure 1 is a plan of my lathe turret with the top plate or cover removed.
Figure 2 is a section of the lathe turret.
Figure 3 is a diagramatic view of a modified form of mandrels operating device.
Figure 4 shows the application of my lathe turret to a lathe.
Figure 5 is a plan of a lathe bed when the mandrels can be revolved by
power.
In carrying the invention into practice, I arrange a sliding saddle A upon a
lathe bed B for the backward and forward motion by hand wheel C, or auto-
matically, and upon this sliding saddle A. I mount a turret composed of frame I)
having recesses carrying bearings E each of which can carry a revolving man-
drel F, being in fact mandrel heads, with their mandrels radiating out from the
common centre on which the turret 1) turns, each mandrel F is preferably
fitted with a worm wheel G for engagement into a worm H driven by a belt
through the pulley I from an overhead motion, or through a worm H¹ fitted on a
splined shaft R attached to the side of the lathe bed B and carrying the pullies I
as at Figure 5.
The worm H is transversely arranged across the front of the revolving turret D
but fixed to the sliding saddle A so that it moves with it, and being in front
or towards the front of the turret 1), only that tool revolves that is presented
to the work.
Ordinary means such as rack and pinion are provided for feeding the saddle
slide A and turret D forward, but I prefer it to be done automatically by the
pull of dead weight J the cord of which runs over a pulley K fixed to the lathe,
the slide A being returned for the turret 1) to be revolved and locked in position
by means of a cam S bearing against a lug T of the saddle slide A.
The position of the worm H is so arranged that each mandrel F as it is
revolved to bring a fresh tool to the front gears by its pinion G into the worm H
and the previous one leaves the worm H and remains idle till again brought
round to the front for operation.
I may use crown and bevel gearing H G with the crown wheel H either
arranged in the same plane as the bevel wheels or at an angle thereto as at
Figure, said crown wheel H being operated in any suitable manner.
If the crown wheel is in the same plane as the bevel wheels all the bevel
wheels will be revolved at one time although only one mandrel is at work,
but if the crown wheel is placed at an angle as seen in dotted lines Figure 3
only the mandrel required will be operated.
Lis a top plate for covering in the pinions G, and M is a handle which carries

page_text: a screw stem N and collar P for engagement with the centre post Q of the
turret D to lock the turret firmly in its adjusted position for operation of the
tools.
I have not shown any device for revolving the turret, but it will be understood
that any means can be adopted for that purpose, the present invention consisting
in arranging revolving tools in a revolving and sliding turret operated by means
preferably of a worm on the sliding saddle and worm wheel on the mandrel.
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. The improved construction of revolving and sliding turret for lathes, con-
sisting in providing such turrets with revolvable tools or mandrels for carrying
tools, and operating such tools or mandrels successively as they are brought
round, substantially as set forth.
2. In lathe turrets, a sliding saddle carrying a revolving turret, said saddle
having worm or other gear, for engaging and revolving pinions on mandrels
situate in the revolving turret, as set forth and substantially as shown.
3. In lathe turrets the combination of a sliding saddle A, a worm or pinion H
in such saddle, a revolvable turret D, rotatable tools or mandrels F, pinions G
arranged on mandrels F and gearing successively with worm H or crown wheel H
or continuously by wheel H substantially as set forth.
R. CORE GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for A. G. Melhuish.
R. CORE GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for A. G. Melhuish.