Improvements in Drivers or Carriers for Lathes.
Year: 1895

page_text: .
Date of Application, 12th Dec., 1895
Complete Specification Left, 6:h Mar., 1896-Accepted, 30th May, 1896
TRUVIDIONAL DI MUITIVATION.
Improvements in Drivers or Carriers for Lathes.
I, CARL BERNHARD AXT, Manufacturer, of Klosterstrasse, Chemnitz, in the
Kingdom of Saxony, do hereby declare the nature of this invention to be as
follows:-
This invention relates to drivers used for imparting rotary motion to shafts or
other pieces of work while they are being turned on the lathe.
Ordinary drivers or carriers have the drawback, that they cannot be removed or
put on, without taking the piece of work off the lathe-centres or points, and that
they may produce accidents by getting hold of the clothes of the turner.
For this purpose I compose the driver of two or three principal parts, joined
together by means of hinges or pivots so as to form a ring, and so arranged that
when one of the said parts (or two of them) has been turned back on its hinge, the
driver may be applied to the piece of work from the side, and that all projections
that might catch the clothes of the turner are avoided.
The movable part or parts of the ring may be adapted to pivot parallel to the
axis of the ring or perpendicular to the same, and various devices may be employed
for keeping the ring closed. The ring may, for instance, consist of two principal
parts hinged together by means of a pin parallel to the axis of the ring and secured
in the closing position by a hook turning on a hinge likewise parallel to the axis of
the ring. The driver may be secured in its position on the piece of work by means
of a set screw for which one of the ring-parts or halves acts as a nut; or it may be.
secured by means of a movable nut pressed against the piece of work by a screw
spindle. In each case the head of the screw spindle is situated in a recess formed
in the circumference of the ring.
Instead of securing the two halves of the ring in their closing position by means
of a hook, I may employ a screw-spindle which serves at the same time for pressing
the ring against the piece of work.
Dated this 28th day of November 1895.
FAIRFAX & WETTER,
Agents for the Applicant.
I, CARL BERNHARD AXT, Manufacturer, of Klosterstrasse, Chemnitz, in
Kingdom of Saxony, 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 drivers used for imparting rotary motion to shafts or
other pieces of work, while they are being turned on the lathe.
Ordinary drivers or carriers have the drawback, that they cannot be removed or
put on, without taking the piece of work off the lathe-centres or points, and that
they may produce-accidents by getting hold-of-the-clothes-of-the-turner.
This liability to accidents occurs, for instance, in Esmarch's lathe drivers, which

page_text: have moreover, the additional drawback that to take them off the piece of work,
one of the screw nuts must be removed, which then easily gets lost.
The present invention has for its object, to produce a lathe driver which is not
a source of accidents, and which can be applied to the piece of work and removed
from the same without separating the different parts of the lathe driver; which
tool thus forms only one piece during the removal.
For this purpose I compose the driver of two or three principal parts, joined
together by means of hinges or pivots so as to form a ring, and so arranged that
when one of the said parts (or two of them) has been turned back on its hiuge, the
driver may be applied to the piece of work from the side, and that all projections
that might catch the clothes of the turner are avoided. The movable part or parts
of the ring may be adapted to pivot parallel to the axis of the ring or perpen-
dicular to the same, and various devices may be employed for keeping the ring
closed.
In the accompanying drawings,
Fig. 1 represents a lathe carrier in which the parts A and B forming the ring,
are connected by a hinge pin parallel to the axis of the ring, and are secured in
their closing position by means of a hook h;
Fig. 2 shows the same lathe carrier after it has been opened;
Figs. 3 to 7 show a lathe carrier in which the parts A, B, forming the ring, are
joined by a pivot parallel to the plane of the ring (and therefore perpendicular to
the axis of the ring and of the shaft to be turned), one part having a projecting
ledge which fits into a recess of the other part, like a bolt; and
Figs. 8 and 9 show a lathe carrier similar to that shown by Figs. 1 and 2, but
composed of two principal parts, a, b, one part, a, being prolonged beyond its
pivot z, so that when the shaft is pressed down by the screw nut m, it engages
with the extension c and keeps the ring closed. Consequently this form of
lathe carrier has the advantage, that it does not require a hook, bolt, or other
device for retaining the parts of the ring in their closing position.
In Figs. 1 and 2 the driver is secured in its position on the piece of work by
means of a set screw S, for which one of the ring parts or halves A, acts as a nut;
in Figs. 3 and 9 it is secured by means of a movable nut m, which is guided in a
straight line and pressed against the piece of work by a screw spindle S₁. In each
case the head of the screw-spindle is situated in a recess formed in the circum-
ference of the ring.
Instead of securing the two ring-halves A and B, (Figs. 1 and 2) in their
closing position by means of a hook 1, 1 may employ a screw spindle, which serves
at the same time for pressing the ring against the piece of work.
In Figs. 1 and 2, the pin or stud R, used for imparting rotary motion to the
lathe driver, simply presses against a flat portion of the ring surface; but in
Figs. 3 and 4 the driving stud or bolt R' fits into a recess r, of the ring.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. A carrier or driver for lathes, composed of two or more parts hinged or
pivoted together so as to form a ring without external projections, which ring can
be opened by turning the said parts outward, substantially as described and for the
purpose specified.
2. The various forms of carrier or driver as described and shown by the
drawings.