Improvements in Travelling Tool Carriages for Lathes.
Year: 1899

page_text: Date of Application, 10th June, 1899-Accepted, 22nd July, 1899
COMPLETE SPECIFICATION.
Improvements in Travelling Tool Carriages for Lathes.
I, JOSEF EXENBERGER, of Zobelstrasse 40, Augsburg, in the Empire of Germany,
Iron Turner, 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 travelling tool carriages for lathes.
Referring to the annexed drawings,
Fig. 1 is a cross section of the carriage.
Fig. 2 a longitudinal section.
Fig. 3 a front view.
The tool carriage bis automatically put in motion by the guide shaft n Fig. 3
in such a manner that this putting into motion can be effected entirely in-
dependently to the displacement of the tool or upper carriage on the lower carriage
which displacement as known is necessary for turning cones and cutting conical
threads and is effected by turning the tool holder round a pin s of the lower
carriage. For this purpose the lower carriage carries a short shaft d concentrical
to the pivots, round which the tool carriage is movably arranged. In the foot
of the tool carriage the shaft d gears by means of toothed wheel gearing with
the shaft c. The shaft e engages with its toothed wheel into the toothed wheel a¹
(which can be thrown out of gear) of the spindle which drives the tool carriage.
The shaft gears with the movable toothed collar f of shaft e Fig. 1.
The latter gears with the toothed wheel (Fig. 1 and 3) which can be thrown
out of gear with the known driving gear him which by means of the toothed
wheel o Fig. 3 drives the spindle Fig. 2 of the lower carriage.
C
By this arrangement the movement of the shaft is transferred to the spindle a
whereby the automatical advancing of the tool carriage b is effected and, according
to whether the toothed wheel drawn in full lines is put into gear or the toothed
wheel drawn in dotted lines, of the shaft Fig. 2 towards the right or left.
The fact that the shaft is concentric to the turning point of the tool carriage
allows the shaft to remain always in gear with the shaft in any such angle
as the tool carriage is put with regard to the lower carriage, consequently, the
automatical working of the former is ensured in any position, but it may be
suppressed by throwing the toothed wheel a¹ out of gear.
For practical use the present invention has the advantage that the troublesome
and gradually acting device hitherto used for driving the tool carriage is suppressed
also the displacement of the slide or mandril stock naturally made only reluctantly
by the turner, is unnecessary. These advantages are especially valuable when
cones, pivots or the like are only now and then to be turned or conical threads
to be cut, the preparations for the same being hitherto troublesome.
-
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is:-
An improved travelling tool carriage for lathes in which a short shaft d carry-

page_text: ing bevelled wheel gear, connecting the driving device of the upper movable
tool carriage b with the driving device of the guide spindle, is arranged con-
centrically to the pivot s of the lower carrier carrying the upper tool carriage,
so that the upper movable carriage in its turning movement at any angle remains
in gear with the driving device & substantially as and for the purpose described.
Dated this 10th day of June 1899.
HERBERT HADDAN & Co.,
Agents to Applicant,
18, Buckingham Street, Strand, London, W.C.