An Improved Lathe Attachment for Dividing and Milling.
Year: 1893

page_text: Date of Application, 4th May, 1893
Complete Specification Left, 3rd Feb., 1894-Accepted, 17th Mar., 1894
PROVISIONAL SPECIFICATION.
An Improved Lathe Attachment for Dividing and Milling.
1, GEORGE SONNENTHAL, of 85 Queen Victoria Street, in the City and County
of London, Engineer, do hereby declare the nature of this invention which has
been communicated to me from abroad by Louis Friedrich Burkhardt of Reuteligen,
Wurtemburg, to be as follows:-
My invention relates to an improved dividing and milling apparatus adapted to
be fixed on an ordinary lathe.
The wheel to be cut is fixed ou a spindle mounted between the centres of the
lathe and carrying a suitable dog or driver. The dividing apparatus consists of
a worm wheel mounted loosely on a socket screwed on to the threaded end of the
spindle of the headstock and carrying jaws adapted to engage with the dog or
driver fixed to the spindle carrying the wheel to be cut.
On to the boss of the worm wheel is loosely mounted a frame which is fixed to
the headstock in a suitable manner. This plate carries bearings in which is mounted
a worm which gears with the worm wheel before described, and on the spindle
carrying the worm is mounted the dividing plate and its mechanism. As the worm
wheel is loosely mounted on the socket on the spindle of the head-stock it is not
driven by the said spindle but receives its motion from the worm which is operated
and regulated by the divided mechanism.
The milling apparatus which is screwed on to the main slide rest consists of a
frame adapted to be moved sideways in close proximity to the slide rest so that
The cutter is mounted in a bearing
part of the cutter covers the slide rest.
capable of being adjusted with respect to the frame so that its correct position can
be readily determined. The cutter spindle is driven by a worm wheel and worm
When cutting
the latter receiving its motion through a pulley from a countershaft.
bevel or similar wheels the apparatus is shifted sideways either on or with the
slide rest, as however it is necessary that the spindle carrying the driving pulley
should always be parallel with the lathe spindle, the bearing carrying the worm is
adjustably mounted on the frame carrying the cutter spindle so that the said pulley
may be retained in its correct position notwithstanding the varying positions in
which the cutter may be placed.
1000
C
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Lathe Attachment for Dividing and Milling.
I, GEORGE SONNENTHAL, of 85 Queen Victoria Street, in the City and County
of London, Engineer, do hereby declare the nature of this invention which has
been communicated to me from abroad by Louis Friedrich Burkhardt of Reuteligen,
Wurtemburg, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
My invention relates to an improved dividing and milling apparatus adapted for
use on an ordinary lathe. The dividing apparatus consists essentially of a worm

page_text: Toosely on a socket adapted to be screwed on to the threaded
end of the spindle of the headstock, and carrying jaws adapted to engage with the
dog or driver fixed to the spindle carrying the wheel to be cut, of a plate or frame
loosely mounted on the boss of the worn wheel and fixed to the headstock in a
suitable manner, of a worm mounted in suitable bearings carried by the plate or
frame and gearing with the worm wheel, and of a dividing plate mounted on
the spindle carrying the worm. The milling apparatus which is adapted to be
fixed on to the main slide rest consists of a frame having suitable bearings to
carry a vertical spindle for carrying the cutter and a horizontal spindle for
carrying the driving pulley, the two spindles being geared together by a worm
and worm wheel, the bearing carrying the worm being adjustably mounted on
the frame carrying the cutter spindle so that the pulley driving it may be placed
in any position to receive the driving power notwithstanding the position in which
the cutter may be placed.
I attain this end in the manner shown by the accompanying drawings in
which:
Figure Sheet No. 1 is a perspective view of a part of a lathe showing my
improved apparatus.
Figures 2, 3 and 4 Sheet No. 2 are views in front elevation side elevation and
transverse section respectively of the dividing apparatus and
Figures 5 and 6 Sheet No. 3 are views in front elevation and side elevation-partly
in section-respectively of the milling apparatus.
Throughout the views similar parts are marked with like letters of reference.
Referring to Figures 1, 2, 3 and 4. A designates the worn wheel which is
mounted loosely-so as to be free to rotate-on a socket B adapted to be screwed
on to the threaded end of the spindle of the headstock of an ordinary lathe. The
worm wheel A carries jaws a adapted to be fixed to the dog or driver fixed to, or
mounted on the spindle carrying, the work to be operated. On the boss of the
worm wheel A is loosely mounted the plate or frame C provided with one or more
holes or slots c whereby it may be bolted or otherwise fixed to the headstock or
bed of the lathe to prevent it rotating. This plate or frame carries bearings c, c,
in which is mounted a spindle D having cut in or mounted on it a worm d which
gears with the worm wheel A. D' designates the dividing plate which is of the
ordinary type. It will be seen that as the worm wheel is loosely mounted on the
spindle of the lathe the dividing operations can be effected while the lathe is
running.
Referring to Figures 1, 5 and 6. E designates the frame of the milling apparatus
which is fixed to the slide rest of the lathe by the centre stud as shown. F the
vertical spindle on which the cutter G is adjustably mounted. H the bracket
carrying the bearing h for the horizontal spindle J on which is mounted a worm K
gearing with a worm wheel L on the vertical spindle F. M designates the driving
pulley on the spindle J.
The bracket H carrying the horizontal spindle is mounted on a sleeve e forming
part of the bracket E so that it can be moved round the axis of the spindle F to
set the driving spindle J at any angle with respect to the axis of the lathe, the
bracket H being split and provided with a transverse bolt or screw h¹ to fix it to
the bracket E after adjustment.
The hereinbefore described apparatus is suitable for cutting spur bevel cog
and other gear wheels of any size and thickness as far as the height of centres
and distance between centres of the lathe will admit, and it may also be used
for making or recutting rimers, taps, key beds, grooved roll, tools, machine part
and the like. The apparatus is self-acting where there is a guide screw to the
lathe.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction herein before described and illustrated by the accompanying
drawing but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope of my invention.

page_text: 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 respective combination of parts as herein before described forming an
improved lathe attachment for dividing and milling.
2. The improved lathe attachment for dividing, substantially as hereinbefore
described with reference to Figures 1, 2, 3 and 4.
3. The improved lathe attachment for milling, substantially as hereinbefore
described with reference to Figures 1, 5 and 6.
4. The improved lathe attachment for dividing and milling, substantially as
hereinbefore described and illustrated by the accompanying drawings.
Dated this 3rd day of February 1894.
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.