Improvements in or relating to Watchmakers' Lathes, and Wheel and Pinion Cutting Accessories therefor, applicable also to other Lathes.
Year: 1894

page_text: Date of Application, 22nd Oct., 1894
Complete Specification Left, 20th July, 1895-Accepted, 7th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Watchmakers' Lathes, and Wheel
and Pinion Cutting Accessories therefor, applicable also to other
Lathes.
I, CHRISTIAN FRITZ LORCH, of 27 Untere Konigstrasse, Bockenheim, near
Frankfurt on Main, in the Empire of Germany, Tool Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in watchmakers' lathes and wheel and
pinion cutting accessories therefor; the improvements may also be applied to
lathes other than watchmakers'.
According to my invention, mount the headstock on a vertical pivot or axis so
as to allow it to be revolved on its carriage in a horizontal plane, thus permitting
right handed as well as left handed work to be accomplished on the lathe. Suitable
means, such as an eccentric mounted on the headstock, bearing on the headstock
carriage and actuated by a lever, would be provided for instantaneously locking
the headstock in the desired position.
Further, for wheel and pinion cutting and also for fraising and polishing, I mount
upon the ordinary horizontal slide rest, a vertical slide rest, on the face of which
is pivotted, so as to be free to turn or revolve in a vertical plane, the bearing
which carries the cutter shaft, suitable means, such as set screws passing through
slots in a disc on the said bearing, being provided for locking the latter in the
desired position.
The last mentioned improvement, when used in conjunction with the revolving
headstock first described, enables wheels of all kinds, such as flat wheels, crown
wheels bevel wheels, ratchet wheels, pinions and the like, to be cut on the lathe.
The usual divided plate would of course be provided.
Dated this 22nd day of October A.D. 1894.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in or relating to Watchmakers' Lathes, and Wheel
and Pinion Cutting Accessories therefor, applicable also to other
Lathes.
I, CHRISTIAN FRITZ LORCH, of 27 Untere Konigstrasse, Bockenheim, near
Frankfurt on Main, in the Empire of Germany, Tool Manufacturer, 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 improvements in watchmakers' lathes and wheel and
pinion cutting accessories therefor, the improvements may also be applied to lathes
other than watchmakers.

page_text: According to my invention, I mount the headstock on a vertical pivot or axis so
that it may be revolved on its carriage in a horizontal plane, thus permitting right
and left handed work to be accomplished on the lathe, and I provide suitable means
for instantaneously locking the headstock in the desired position.
Further, as a lathe accessory for wheel and pinion cutting and also for fraising
and polishing, 1 mount upon the ordinary horizontal slide rest, a vertical slide rest,
on the face of which the cutter shaft stock or bearing is pivotted so that it may
be turned or revolved in a vertical plane, suitable means, such as set screws passing
through slots in a disc on the said stock, being provided for locking the same in
the desired position.
In order that my invention may be clearly understood I will now describe the
annexed drawings, in which similar letters refer to like parts in both figures,
and in which :-
Fig. 1 represents a watchmakers' lathe constructed in accordance with my
invention, and
Fig. 2 is a detail of the eccentric locking arrangement for the revolving
headstock.
The beadstock A is divided horizontally at b, the upper part a being connected
with the carriage part a' by the vertical pivot c. This arrangement permits the
upper part a to be revolved in a horizontal plane upon the carriage a', and allows
beth right and left handed work to be accomplished on the lathe. Any convenient
means may be employed for locking the headstock in the desired position, and in
the drawings I have shewn a handy device consisting of an eccentric d mounted
upon a spindle e and working within a hole f which extends through the pivot c.
When the eccentric is turned by means of the lever g into the position illustrated,
it will draw the parts a a' of the headstock A firmly together and thus lock them
in position.
In place of the usual sliding cutter carrier, I mount a vertical slide rest B upon
the ordinary horizontal slide rest C. This vertical slide rest B carries the stock
or bearing of the cutter spindle i, said stock h being connected with the slide k
of the slide rest B by the horizontal pivot l. m is a disc formed on the back of the
stock and constructed with slots n through which pass the set screws o which
screw into the slide k. On loosening these set screws, the cutter stock can be
turned on the pivot in a vertical plane, and set at any desired angle by tightening
up the said set screws.
The above described revolving headstock and vertical slide rest, when used in
combination, enable the article operated upon and the cutter or drill to be placed
in every imaginable position in relation to one another, and permit wheels of all
kinds, such as flat wheels, crown wheels, bevel wheels, ratchet wheels, conical
pinions and the like to be cut. p is a large division plate having a number of
divided circles.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. In watchmakers' and other lathes, a headstock constructed so that it may be
revolved in a horizontal plane upon its carriage, and provided with suitable means
whereby it may be locked in the desired position, substantially as described and
illustrated.
2. In watchmakers' and other lathes, the combination with the ordinary horizontal
slide rest of a vertical slide rest to which the cutter shaft stock or bearing is
pivotted so that it may be turned or revolved in a vertical plane, substantially as
described and illustrated.
3. In watchmakers' and other lathes, the combination of headstock constructed
so that it may be revolved in a horizontal plane and a vertical slide rest mounted
upon the ordinary horizontal slide rest, said vertical slide rest having pivotted
thereon, so that it may be turned or revolved in a vertical plane, the stock or

page_text: bearing for the cutter shaft, substantially as and for the purpose described and
illustrated.
4. A lathe and wheel and pinion cutting accessory therefor, constructed and
arranged substantially as illustrated in the annexed drawings.
Dated this 19th day of July 1895.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19 Southampton Buildings, Chancery Lane, London, W.C., Agents.