Improvements in Spinning and like Machine Spindles and Bearings therefor.
Year: 1899

page_text: Date of Application, 21st Feb., 1899-Accepted, 15th Apr., 1899
COMPLETE SPECIFICATION.
Improvements in Spinning and like Machine Spindles and Bearings
therefor.
We, JOHN BOOTH and CHARLES DENNY WOOD, of Central Falls, in the County
of Providence and State of Rhode Island, United States of America, Manu-
facturers, 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, that is to say:--
to
This invention has for its object to enable a spindle-bolster
adjust itself automatically on the spindle which runs in it, to compensate for
wear both of the spindle and bolster, so that no adjustment of the bolster by the
operatives will be required. To this end, the invention consists in the combina-
tion with a bolster-case, of a spindle having its surface which bears on the bolster
tapered inwardly from its lower to its upper portion (the taper being the reverse
of that in an ordinary spindle), and a bolster which conforms to the taper of the
spindle and is adapted to gravitate or move downwardly on the spindle as the
wear of the contacting parts of the spindle and bolster may require.
Of the accompanying drawings, forming a part of this specification:-
Figure 1 represents an elevation of a spindle and bearing embodying my inven-
tion, the bolster-case bolster, and whirl being shown in section.
Figure 2 represents a section on line 2-2, Fig. 1.
Figure
represents a perspective view of the bolster.
The same letters of reference indicate the same parts in all the figures.
In the drawings,
a represents the bolster-case, which may be of any suitable form and con-
struction, and is provided with a step b. o represents the spindle, the lower end
of which bears as usual on the step and is provided with the whirl c. d repre-
sents the bolster, which has a running fit on the spindle and has the usual
somewhat loose fit in the bolster-case.
In carrying out our invention, we taper the surface of the spindle that bears
on the bolster, inwardly from its lowest to its highest portion, the said surface
decreasing in diameter from its lowest portion upwardly. We also correspondingly
taper the inner surface of the bolster, its bore or bearing face decreasing in
diameter from the lower portion of the bolster upwardly. The bolster is thus
supported by the portion of the spindle on which it bears, and is adapted to adjust
itself upon the spindle by. gravitation, the bolster moving downwardly on the
spindle as the contacting surfaces wear away, so that the desired running fit
between the bolster and spindle is automatically maintained, no human interven-
tion being required.
T
'
.
We are the first, so far as we are aware, to taper the surface of the spindle that
bears on the bolster, inwardly from the lower portion upwardly, and to corre-
spondingly taper the inner surface of the bolster, so that the bolster is supported
by the spindle and has an automatic gravity adjustment thereon. Heretofore,
the said surface of the spindle has been tapered outwardly from the lowest to the
highest portion, the diameter increasing from the lowest portion upwardly, so
that the bolster, which is correspondingly tapered, has to be raised to compen-

page_text: sate for wear of the contacting parts. Attempts have been made to provide an
automatic adjustment of the bolster by subjecting the same to an upward yielding
pressure. Such adjustment, however, involves a complicated construction, and
is unsatisfactory for various reasons well known to those skilled in the art. It
will be seen that the gravity adjustment of the bolster involves the simplest
possible construction, and a constant weight or pressure of the gravitating or
adjustable part, the pressure being unaffected by variations in the load on the
spindle. Since the described taper of the surface of the spindle on which the
bolster bears is the reverse of that of the ordinary spindle, I hereinafter term
the same an inverted taper, for the sake of brevity.
The said inverted taper is preferably extended to the upper end of the spindle,
but is not necessarily extended to its lower end, the lower portion of the surface
of the spindle being preferably reduced in diameter from the lower portion of the
bolster downwardly, as shown in Figure 1.
It is of course essential that the lower end of the bolster be elevated sufficiently
above the step b to permit the necessary downward movement or gravity adjust-
ment of the bolster."
Means are provided for preventing the rotation of the bolster with the spindle,
said means as here shown comprising a pin or stud e affixed to the bolster-case
and projecting into the same, and a longitudinal groove or slot f in the bolster,
the pin projecting into the slot and preventing the rotation of the bolster, while
permitting the gravitating adjustment thereof.
We prefer to make the bolster elastic or expansible, so that it can be forced on
to the spindle from the lower end thereof, without the necessity of displacing the
whirl. To this end, the slot f may extend entirely through one side of the
bolster, from end to end, as shown in Figures 1 and 3, and another slot fi may
be formed at the opposite side of the bolster, the last-mentioned slot extending
only a part of the length of the holster. The continuous slot f furnishes a
channel which conducts oil from the lower portion of the bolster-case along
the entire length of the bolster. In this connection, it may be observed that the
weight of the gravitating bolster, and its downward pressure or load on the
spindle, is partially counteracted by the oil in the bolster-case.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
:-
1. The combination of a bolster-case, a spindle having an inverted taper within
the case, and a gravitating bolster supported by the inverted taper of the spindle
and adapted to automatically adjust itself thereon to compensate for wear, an
unobstructed space being provided below the bolster to permit it to gravitate to
a practically unlimited extent.
2. The combination of a bolster-case, a spindle having an inverted taper within
the case, a vertically movable bolster which conforms to the said inverted taper,
said bolster having a longitudinal slot, and a pin affixed to the bolster-case and
engaged with said slot, an unobstructed space being provided below the bolster
to permit it to gravitate to a practically unlimited extent to compensate for wear.
3. The combination of a bolster-case, a spindle having an inverted taper within
the case, a step for the spindle, and a vertically movable bolster which is longi-
tudinally split to render it elastic or expansible, said bolster being unconnected
with the step and adapted to gravitate to compensate for wear.
ليوم
P
1000