IMPROVEMENTS IN LATHES FOR TURNING
Year: 1885

page_text: I CHARLES PENDLEBURY of N° 110 Holyhead Road Handsworth in the County
of Stafford Mechanical Draughtsman do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN LATHES FOR TURNING " to be as follows:-
The object of my invention is to reduce the number of parts ordinarily employed
to take the end pressure or "thrust" of the running spindle and also to take up
the wear by the said end pressure or "thrust" and thereby to maintain the
accurate working of the spindle.
I effect these objects in the following manner: I form by turning on the part of
the spindle which is situated in the bearing a series of collars and grooves which
fit in corresponding grooves and collars in the bearing. At the back end of the
bearing lock nuts are threaded on the spindle and a washer is placed between the
lock nuts and bearing. By means of the said lock nuts any wear may be taken
up that occurs between the collars on the spindle and the collars in the bearing.
The bearing is made in two parts and acts as an ordinary cylindrical bearing
for the spindle in addition to its function with respect to the end thrust as herein-
before described.
For lubricating the bearing and spindle I cut a groove along the bottom of the
bearing which groove is filled with oil or other lubricant.
The collars on the spindle are thus made to run in the lubricant.

page_text: I CHARLES PENDLEBURY of N° 110 Holyhead Road, Handsworth in the County
of Stafford, Mechanical Draughtsman do hereby declare the nature of the said
Invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
The object of my invention is to reduce the number of parts ordinarily employed
to take the end pressure or "thrust" of the running spindle and also to take up
the wear by the said end pressure or "thrust" and thereby to maintain the
accurate working of the spindle.
I effect these objects in the following manner. I form by turning on the part of
the spindle which is situated in the bearing, a series of collars and grooves which
fit in corresponding grooves and collars in the bearing. At the back end of the
bearing locks nuts are threaded on the spindle and a washer is placed between the
lock nuts and bearing. By means of the said lock nuts any wear may be taken
up that occurs between the collars on the spindle and the collars in the bearing.
The bearing is made in two parts and acts as an ordinary cylindrical bearing
for the spindle in addition to its function with respect to the end thrust as herein
before described.
For lubricating the bearing and spindle I cut a groove along the bottom of the
bearing which groove is filled with oil or other lubricant.
The collars on the spindle are thus made to run in the lubricant and when
revolving take up and carry round with them sufficient oil to lubricate the bearing
and spindle.
The accompanying Drawing represents in vertical section a portion of the head-
stock of a lathe containing my improvements.
E is the running or rotating spindle of the lathe on one of the bearing ends of
which is a series of collars and grooves A, A¹ the collars being marked A and the
grooves alternating with the collars being marked A¹. The spindle E beyond the
bearing is screwed at F and on the screwed end, lock nuts C C are screwed, a
washer G being interposed between the lock nuts and bearing.
HH' are the two parts of the bearing in which the collared and grooved end
of the spindle E works. The said bearing resembles and has the same function as
an ordinary cylindrical bearing excepting that the interior of the bearing is
provided with grooves and collars corresponding with those on the spindle. The
manner in which the collars and grooves on the end of the spindle fit in the
corresponding grooves and collars in the cylindrical bearing H H* will be seen
by an examination of the Drawing where it will be seen that the end thrust or
pressure of the spindle is borne by the collars on the spindle bearing against those
on the interior of the bearing H, H².
In the bottom part H of the bearing a longitudinal groove D is made, having
closed ends, constituting a trough or receptacle. This groove or receptacle D is
filled with oil or other lubricant by means of the oil hole B made through the top
or side of the bearing; or oil may be supplied to the groove or trough D in any
other convenient manner. The collars A on the end of the shaft or spindle E dip

page_text: into the lubricant in the groove or trough D and by their rotation take up
and carry round with them sufficient oil to efficiently lubricate the spindle and
bearing.
When it is wished to take up the wear of the end thrust or pressure of the
spindle it is only necessary to adjust the lock nuts CC upon the screwed end F of
the spindle. By this means the wear between the collars on the spindle and those
on the bearing is taken up and the accurate working of the spindle thereby
maintained.
Either end of the spindle and the bearing in which it works may be provided
with the collars and grooves described and represented.
My improvements may be applied to lathes generally for turning metals and non
metallic materials.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performed I declare that I claim as my
invention of "Improvements in lathes for turning "
First. Making on one end of the running or rotating spindle of the lathe a
series of collara and grooves and combining therewith a bearing provided with
grooves and collars for those on the spindle to fit into for taking the end thrust or
pressure of the said running or rotating spindle substantially as herein before
described and illustrated in the accompanying Drawing.
Secondly. The combination with the collared and grooved spindle and bearing
claimed in the first claim of the lock nuts and screwed end of the spindle for taking
up the wear between the collars on the spindle and bearing substantially as herein
before described and illustrated in the accompanying Drawing.
Thirdly. Making in the collared and grooved bearing a longitudinal groove,
trough or receptacle for containing oil or other lubricant into which trough and
lubricant the collars on the spindle dip and take up the oil or lubricant for
lubricating the bearing and spindle as herein before described and illustrated in the
accompanying Drawing.
T
1000