Improved Bearing for Lathe Spindles.
Year: 1898

page_text: Date of Application, 9th Sept., 1898
Complete Specification Left, 2nd June, 1899-Accepted, 8th July, 1899
PROVISIONAL SPECIFICATION.
Improved Bearing for Lathe Spindles.
I, JULIUS SCHWARZ, of No. 10, Schwabenthorstrasse, Freiburg (Baden), Ger-
many, do hereby declare the nature of this invention to be as follows:-
In lathes having revolving centres it is extremely difficult to arrange the bear-
ings of the spindle in such a manner that it will be prevented from shifting in
all directions, whilst it is allowed to run freely. Usually after the bearing cones
have been tightened, the spindles run hard, and then become loose after a certain
time.
My present invention has for its object to prevent any occurrence of looseness
and consequent shifting through wear; I will describe the improved construction
with reference to the accompanying drawing in which Fig. 1 shews a longitu-
dinal section, on line A, B, Fig. 2, which shews a plan. Figs. 3 and 4 are
cross sections take respectively on lines CD and EF.
In this construction the arrangement for preventing longitudinal movement of
the spindle W in the headstock R (Fig. 1) is separated from the arrangement for
preventing transverse shifting. To this end I provide on the rear part of Wa
steel cone which is capable of movement in the direction of the geometrica!
axis of this spindle, and which is pressed by means of a nut n into the gun-metal
bearing bush b¹.
For the purpose of preventing any longitudinal shifting of the spindle con-
sequent on the thrust exercised by the nut n, a steel ring I is fixed on the bear-
ing bush 61; and a similar steel ring I³ is fixed on a shoulder of the spindle W.
Between these two fixed rings a ring I is arranged loose and capable of revolv-
ing, and it will be readily perceived that the tightening of k can be limited to
an extent such that I can still run between I and 12 without producing any great
friction, whilst the spindle will be able to oppose a sufficient resistance to a longi-
tudinal pressure in the direction of the arrow 1.
This resistance is aided by the conical bearing bush 62 in which the conically
turned shaft runs.
This bearing bush can be adjusted longitudinally upon the shaft cone by means
of the screw nuts 1 and 2 with such accuracy as will exclude all looseness. If
however the spindle should wear to any extent by reason of continual
use, the
bearing can always be re-adjusted in such a manner as to reproduce the original
perfect guidance of the spindle. Around the rings I I I2 there is formed an oil
chamber, so that any jamming or sticking of the movable intermediate ring is
prevented.
Dated this 9th day of September 1898.
ABEL & IMRAY,
Agents for the Applicant.

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement:-
In lathes having revolving centres it is extremely difficult to arrange the bear-
ings of the spindle in such a manner that it will be prevented from shifting in
all directions, whilst it is allowed to run freely. Usually after the bearing cones
have been tightened, the spindles run hard, and then become loose after a certain
time.
My present invention has for its object to prevent any occurrence of looseness
and consequent shifting through wear; I will describe the improved construction
with reference to the drawing accompanying my Provisional Specification in
which Fig. 1 shews a longitudinal section, on line A-B, Fig. 2, which shews
a plan. Figs. 3 and 4 are cross sections taken respectively on lines CD and E F.
In this construction the arrangement for preventing longitudinal movement of
the spindle W in the headstock R (Fig. 1) is separated from the arrangement for
preventing transverse shifting. To this end I provide on the rear part of Wa
steel cone which is capable of movement in the direction of the geometrical
axis of this spindle, and which is pressed by means of a nut n into the gun-metal
bearing bush br
For the purpose of preventing any longitudinal shifting of the spindle con-
sequent on the thrust exercised by the nut n, a steel ring I is fixed on the bear
ing bush 6; and a similar steel ring I is fixed on a shoulder of the spindle W.
Between these two fixed rings a ring I is arranged loose and capable of revoly-
ing, and it will be readily perceived that the tightening of k can be limited to
an extent such that I can still run between I and I2 without producing any great
friction, whilst the spindle will be able to oppose a sufficient resistance to a longi-
tudinal pressure in the direction of the arrow 1.
This resistance is aided by the conical bearing bush 62 in which the conically
turned shaft runs.
This bearing bush can be adjusted longitudinally upon the shaft cone by means
of the screw nuts 1 and 2 with such accuracy as will exclude all looseness. If
however the spindle should wear to any extent by reason of continual use, the
bearing can always be re-adjusted in such a manner as to reproduce the original
perfect guidance of the spindle. Around the rings II' I2 there is formed an oil
chamber, so that any jamming or sticking of the movable intermediate ring, is
prevented.
the nature of this
Having now particularly described and ascertained
invention and in what manner, the same is to be performed, I declare that what
I claim is;
1. A bearing for lathe spindles consisting of a cone k mounted on the lathe
spindle and longitudinally adjustable within the coned bearing bush band
operating in combination with rings II2 fixed respectively on the bearing b¹ and
the lathe spindle and ring I situated loose between II³ the said parts being
arranged and operating, substantially as and for the purposes described."
2. A bearing for lathe spindles combined and operating as herein described
with reference to the drawings.
"
Dated this 2nd day of June 1899.
ABEL & IMRAY,
Agents for the Applicant.