Improved Means for Adjusting the Bearings of Shafts and Spindles.
Year: 1894

page_text: Date of Application, 5th Apr., 1894
Complete Specification Left, 5th Feb., 1895-Accepted, 23rd Mar., 1805
PROVISIONAL SPECIFICATION.
Improved Means for Adjusting the Bearings of Shafts and Spindles.
I, WILLIAM THOMLINSON-WALKER, of The Victoria Iron Works, Walmgate,
York, Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a simple, cheap, and thoroughly
efficient means of ensuring the adjustment, vertically, of the bearings of driving
shafts and spindles; shafts in machines, hangers, pedestals and the like, combined
with effectual means for safely securing the adjusting screws in position when
subjected to vibration caused by gearing, belting &c. whilst shafts or spindles are
in motion.
Hitherto in the manufacture of adjustable bearings it has been usual under one
mode of procedure, to screw cut, by machine, the top and bottom bosses with a
female thread to receive the male adjusting screws-also screw cut by machine.
Another method has consisted in forming the female screws in top and bottom
bosses by casting (instead of machining) and also casting the adjusting screws.
Both of these methods involve a certain amount of risk and liability to
inaccuracies; with a view to overcome which defects and whilst simplifying the
mode and lessening the cost of construction yet at the same time ensuring a
perfectly firm vertical adjustment, a feature indispensable in bearings of this
description, I proceed as follows, that is to say:
--
Through the boss-preferably the centre thereof-I cast a slot hole and another
hole at right angles with said slot holes formed through each boss. Each of the
first referred to slot holes has a raised surface formed on the top and bottom
thereof, the function of which is hereinafter referred to. These raised surfaces
are accurately machined or faced parallel with each other at the same setting as
the vertical holes are bored through the bosses. In each slot hole between the
surfaces beforenamed a machined nut is inserted, these nuts are screw cut with a
square thread to receive the vertical square threaded adjusting screws.
I prefer
making these adjusting screws with square threads, as they have more bearing
surface in the bosses and are not liable to "strip" or
66 burr as would be the case
if a V threaded screw were employed, when "set up" by the screw on the front of
each boss.
Dated this 22nd day of March 1894.
Improved Means for Adjusting the Bearings of Shafts and Spindles.
I, WILLIAM THOMLINSON-WALKER, of Victoria Iron Works, Walmgate,
York, Engineer, 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 :-
The object of this invention is to provide a simple, cheap, and thoroughly
efficient means of ensuring the adjustment, vertically, of the bearings of shafting

page_text: and spindles; shafts in machines, hangers, pedestals and the like, combined with
effectual means for safely securing the adjusting screws in position when subjected
to vibration caused by gearing, belting &c. whilst the shafts or spindles are in
motion.
Hitherto in the manufacture of adjustable bearings it has been usual under one
mode of procedure, to screw cut, by machine, the top and bottom bosses with a female
thread to receive the male adjusting screws-also screw cut by machine. Another
method has consisted in forming the female screws in top and bottom: bosses by
Both of
casting (instead of machining) and also casting the adjusting screws.
these methods involve a certain amount of risk and liability to inaccuracies.
Now in accordance with my improvements, in order to overcome the defects and
drawbacks above pointed out, I adopt the means illustrated in the accompanying
sheet of drawing, by the employment of which I not only simplify the mode and
lessen the cost of manufacture but am enabled likewise, and withal, to retain the
necessarily most important feature of perfect adjustment.
In the drawings, Figure 1 is a side elevational view partly in section; and
Figure 2 a horizontal section taken on line a, Figure 1, illustrating my
improvements as applied in the case of bracket or hanger bearings.
"
"
"
In carrying out my invention I cast in each of the bosses B, B a cavity C ; and,
a slot hole D at right angles to C. Each of the cavities C is formed, where
indicated on the drawing with "risen surfaces c, which are accurately machined
or faced parallel with each other at the same "setting" as the vertical holes D.
In each recess C and between the "risen surfaces c, a machine nut d, is inserted.
The nuts d, are screw cut with a square thread to receive and into which accurately
fit the square threaded vertical adjusting screws e of the shaft or spindle bearings E.
I employ set screws 9 which on being screwed up, press on the front side of the
nuts d aforesaid, and by means of the provision of the recess f, when the vertical
adjustment has been effected, then the screwing "home" of 9 will result in th
forcing of the vertical adjusting screwed spindles e, and at the same time the screw
threaded nuts d aforesaid, against the "off" side of the bosses at 1, 2. Each part
of the device will then be perfectly locked and held rigidly in position-a most
essential point in this class of bearings-on the set screws g being tightened up.
I prefer to adopt square threads for the adjusting screws e, because they have more
bearing surface in the bosses and the application of pressure on the top of the
thread at 1 and 2 will not "strip" or "burr" the thread as would be the case if
a threaded screw were adopted. But, on the contrary the flat surfaces of the
tops of the threads which I adopt will answer the same purpose as a guide, in fact,
resulting as it were, in a parallel piece fitting through the boss.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what 1
claim is :-
The means for, and method of adjusting, vertically, the shafting in hangers,
shafts in machines, pedestals and the like, as and for the purposes herein set
forth.
Dated this Fifth day of February 1895.
V. LAZARUS,
1, Furnival Street, London, E.C., Agent for Applicant.