IMPROVEMENTS IN MOUNTING ROTATING SHAFTS IN THEIR BEARINGS
Year: 1881

page_text: LETTERS PATENT to James Tangye, of Birmingham, in the County of
Warwick, and of Aviary Cottage, near Redruth, Cornwall, Mechanical
Engineer, for an Invention of "IMPROVEMENTS IN MOUNTING ROTATING
SHAFTS IN THEIR BEARINGS."
PROVISIONAL SPECIFICATION left by the said James Tangye at the Office
of the Commissioners of Patents on the 17th August 1881.
JAMES TANGYE, of Birmingham, in the County of Warwick, and of Aviary
Cottage, near Redruth, Cornwall, Mechanical Engineer. "IMPROVEMENTS IN
MOUNTING ROTATING SHAFTS IN THEIR BEARINGS."
My Invention has reference principally to long rotating shafts, commonly called
line shafting, but is also applicable to shafts in general.
Rotating shafting as ordinarily constructed and mounted consists of a cylindrical
bar supported at its ends and also, when required, at intermediate points in fixed
bearings, in which bearings the shaft rotates. Longitudinal motion of the shaft,
that is, motion in the line of its axis, is prevented by collars fixed on the shaft on
each side of one or more of the bearings.
The portions of the shaft situated in the bearings become grooved by the action
of the beari, and the object of my Invention is to prevent the said grooving; this
I effect by nunting the shaft in its bearings in the following manner :-
I dispense with the collars ordinarily fixed on the shaft on each side of the
bearing, but I fix on the shaft in any convenient part, but preferably near one end,
two fixed collars, both the said collars being on the same side of a bearing if they
are fixed near a bearing. Between these collars is a loose collar. Immediately
over the middle or loose collar is a vertical lever, the lower forked end of which
engages with studs or snugs on each side of the loose collar. This lever turns upon
an axis carried by a fixed bracket, and a slow to and fro motion is given to the
upper arm of the lever by means of a crank pin on the face of a slowly rotating
Price Bd1

page_text: tangent wheel engaging in a slot in the said upper arm. Motion is given to the
tangent wheel by a screw, which takes its motion from the shaft by means of a
band and pulleys, or by frictional gearing.
As the tangent wheel slowly rotates it gives a slow to and fro motion to the
lever, which is transmitted by the latter through the loose collar on the shaft to
the said shaft, the said loose collar acting on one or other of the fixed collars so as
to move in one or other direction By these means the rotating shaft is made
slowly to travel backwards and forwards longitudinally through a short range, and
the formation of grooves in the shaft is prevented.
A highly polished surface is produced on the working parts of the shaft, friction:
being thereby reduced and lubricating oil saved.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Tangye in the Great Seal Patent Office on the
2nd February 1882.
JAMES TANGYE, of Birmingham, in the County of Warwick, and of Aviary
Cottage, near Redruth, Cornwall, Mechanical Engineer. "IMPROVEMENTS IN
MOUNTING ROTATING SHAFTS IN THEIR BEARINGS."
My Invention has reference principally to long rotating shafts, commonly called
line shafting, but is also applicable to shafts in general.
Rotating shafting as ordinarily constructed and mounted consists of a cylindrical
bar supported at its ends and also, when required, at intermediate points in fixed
bearings, in which bearings the shaft rotates. Longitudinal motion of the shaft,
that is, motion in the line of its axis, is prevented by collars fixed on the shaft on
each side of one or more of the bearings.
The portions of the shaft situated in the bearings become grooved by the action
of the bearing, and the object of my Invention is to prevent the said grooving; this
I effect by mounting the shaft in its bearings in the following manner:-
I dispense with the collars ordinarily fixed on the shaft on each side of the
bearings, but I fix on the shaft in any convenient part, but preferably near one end,
two fixed collars, both the said collars being on the same side of a bearing if they
are fixed near a bearing. Between these collars is a loose collar. Immediately
over the middle or loose collar is a vertical lever, the lower forked end of which
engages with studs or snugs on each side of the loose collar. This lever turns upon
an axis carried by a fixed bracket, and a slow to and fro motion is given to the
upper arm of the lever by means of a crank pin on the face of a slowly rotating
tangent wheel engaging in a slot in the said upper arm. Motion is given to the
tangent wheel by a screw, which takes its motion from the shaft by means of a
band and pulleys, or by frictional or other gearing.
As the tangent wheel slowly rotates it gives a slow to and fro motion to the
lever, which motion is transmitted by the latter through the loose collar on the
shaft to the said shaft, the said loose collar acting on one or other of the fixed
collars so as to move it in one or other direction. By these means the rotating
shaft is made slowly to travel backwards and forwards longitudinally through a
short range, and the formation of grooves in the shaft is prevented.
A highly polished surface is produced on the working parts of the shaft, friction
being thereby reduced and lubricating oil saved.
I will now describe with reference to the accompanying Drawing the manner in
which my Invention is to be performed.
Figure 1 represents in elevation partly in longitudinal section, and Figure 2 in
cross section, my improvements in mounting rotating shafts in their bearings.
The same letters of reference indicate the same parts in both Figures of the
Drawing.
a is the rotating shaft driven in the ordinary way. b, c, are two collars fixed by
the screws d, d, (or otherwise fixed) to the shaft a. These collars are situated
preferably near one end of the shaft, and on the same side of the fixed bearing in
which the shaft is supported. Between the two fixed collars b, c, on the shaft a is
a loose collar e. Over the middle of the loose collar e is a vertical lever ƒ ƒ³,
turning on the pin or centre g, and having an oscillating or a to and fro motion
given to it in the line of the shaft a. The axis g on which the lever ff, turns is
carried by the fixed bracket h. The lower arm f³ of the lever ff, is forked, and
the forked end engages with the studs or snugs i, i, on each side of the loose collare
(see Figure 2). A slow to and fro or oscillating motion is given to the lever ƒ, ƒ³,

page_text: in the following manner-At right angles to the rotating shaft a, and carried in
a bearing in the fixed bracket h, is a shaft k, having at its end a tangent wheel l.
On the face of the said tangent wheel is a crank pin m; this crank pin m works in
the slot n in the upper arm f of the lever f. f. A slow rotatory motion is given to
the tangent wheel 7 by the shaft p, carrying at its end a worm q, which gears with
the said tangent wheel Z. The shaft p is driven by a band passing over the
pulley p³, the said band receiving motion from the shaft a, or the said shaft p may
be other wise driven.
By the slow rotatory motion given to the tangent wheel 2 by the worm q a alow
to and fro or oscillating motion is given to the lever f, f, which motion is trans-
mitted by the latter through the loose collar e to one or other of the fixed collars b, c,
on the shaft a, and the said shaft a is thereby made slowly to travel backwards
and forwards longitudinally through a short range, as will be understood by an
examination of the Drawing.
By giving to the rotating shaft the longitudinal to and fro motion described the
advantages hereinbefore pointed out are obtained.
Although the arrangement I have described and represented for giving the slow
longitudinal to and fro motion to the shaft in its bearings answers well in practice,
yet I do not limit myself thereto, as other equivalent arrangements may be adopted
for giving the slow longitudinal to and fro motion to the shaft.
•
Having now described the nature of my Invention and the manner in which the
same is to be performed, I wish it to be understood that I claim as my Invention,
the improvements in mounting rotating shafts in their bearings, herein before
described and illustrated in the accompanying Drawing, that is to say, dispensing
with the collars ordinarily fixed on the shaft on each side of the bearing, and fixing
two collars on the shaft on the same side of the bearing at a short distance apart,
between which fixed collars a loose collar is situated, by means of which loose
collar a slow longitudinal to and fro motion is given to the said shaft by the
arrangement or combination of parts described and illustrated, or by other
equivalent mechanism for the purpose, and substantially as described and
illustrated.
In witness whereof, I the said James Tangye, have hereunto set my hand
and seal, this Twenty sixth day of January, in the year of our Lord One
thousand eight hundred and eighty two
Witness,
EDWIN DAVEY,
Illogan,
Cornwall.
JAMES TANGYE. (L.S.)