provements in Shaft Couplings, and in the Method of Fitting same to the Shafts
Year: 1895

page_text: Date of Application, 29th Apr, 1895
Complete Specification Left, 29 h Jan, 1896-4ccepted, 29th Feb
1898
PROVISIONAL SPECIFICATION
Improvements in Shaft Couplings, and in the Method of Fitting
same to the Shafts
I, ENOCH WESLEY BATE of Compton Mill, near Wolverhampton in the
County of Stafford, Millwright, do hereby declare the nature of this invention to
be as follows
This invention relates to shaft couplings which are divided longitudinally into
halves, the halves being bolted together to fix them firmly around the ends of the
shafts to be coupled It has been found necessary with couplings of this type to
bore them out very truly in order that they may be a good fit upon the shifts, as
otherwise each half bears simply along the middle portion thereof against the
shafts and the coupling is very liable to slip
Now, the object of this invention is to facilitate the means of ensuring that the
coupling will fit properly upon the ends of the shafts
According to this invention, the hole through the centre of the coupling 15
formed with four or more strips or widths of sui face which run longitudinally
through the coupling aud project slightly inwards from the general surface of the
interior of such hole Two or more of these strips or widths of surface are formed
in each half of the coupling, and they are conveniently spaced at equal distances
around the circumference of the hole The large diameter of the hole, as
measured when the coupling is fixed in place, is larger than the diameter of the
shifts to be coupled, but the shorter diameter of the hole, that is the diameter of
the cucle which may be struck touching the inner faces of the inwardly projecting
stups or surfaces, is at first slightly less than the diameter of the shatts to be
coupled, or than the diameter of the shifts with a thickness of emery cloth there-
alound
The shape above defined of the hole through the coupling may be
produced simply in the process of casting When the coupling is first to be used,
a piece of einery cloth is stretched over one of the shafts to be coupled, and each
half of the coupling is rubbed along the cloth to and-fro end ways, whereby the
projecting strips or surfaces are ground down true with the cylindrical form of the
shaft, except that the diameter is slightly increased by the thickness of the cloth
A piece of emery cloth or other woven material, biown paper or the like, is then
preferably cemented or glued inside each half coupling, and the two half couplings
are bolted together around the ends of the shafts If there are only four inwardly
projecting strips or suifices formed within the hole through the coupling, the
coupling bears in four places only around the cucumferences of the shafts, but with
the emery cloth or like material (when such is used) between and so on for any
number of such strips or surfaces The inwardly projecting strips or surfaces,
aforesaid, of the coupling may be filed up slightly before being rubbed on the
emery cloth, in case they are not found to be true cnogh for the rubbing upon the
emery to true them up sufficiently without too much labour Dowels may be used
entering partly within the shafts and partly within the coupling, if desired, to give
additional hold, more especially in the case of shafts of laige diameter, or keys
may be used for such purpose
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.

page_text: Improvements in Shaft Couplings, and in the Method of Fitting
same to the Shafts
I, ENOCH WFSLEY BATE, of Compton Mill near Wolverhampton in the
County of Stafford, Millwright, 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
This invention relates to shaft couplings which are divided longitudinally into
halves, the halves being bolted together to fix them firmly around the ends of the
shafts to be coupled It has been found necessary with couplings of this type to
bore them out very truly in order that they may be a good fit upon the shafts, as if
the couplings are bored slightly luge than the diameter of the shafts each half
bears simply along the middle portion thereof against the shafts and the couplings
are very liable to slip
Now, the object of this invention is to facilitate the means of ensuing that a
coupling of such type will fit properly upon the ends of the shafts
According to this invention the hole through the centre of the coupling is formed
with four or more strips or width of surface which run longitudinally through the
coupling and project inwards from the general sui face of the interior of such hole
Two or more of these strips on widths of surface are formed in each half of
the coupling, and they are conveniently spaced at equal distances around the
cucumference of the hole The longer diameter of the hole, as measured when the
halves of the coupling are in the position in relation to one another which they
assume when fixed in place, is larger than the diameter of the shifts to be coupled
1ut the shorter diameter of the hole, that is the diameter of the circle which may
he truck touching the inner faces of the inwardly projecting strips or surfaces, is
at first slightly less than the diameter of the shafts to be coupled, or than the
dimeter of the shafts with a thickness of emery cloth there¹ound
The shape
above defined of the hole through the coupling may be produced simply in the
process of casting When the coupling is first to be used, a piece of emery cloth is
stretched over one of the shafts to be coupled, and each half of the coupling is
rubbed alon, the cloth to-and-fio endway, whereby the projecting strips or
sui aces are ground down time with the cylindrical form of the shaft, except that
the diameter is slightly increased by the thickness of the cloth A piece of emery
cloth or other woven material brown paper or the like, is preferably then cemented
olued in the each half coupling, and the two half couplings arc bolted together
around the ends of the shafts If there are only four inwardly projecting strips or
surfaces formed within the hole through the coupling, the coupling bears in four
places only around the encumferences of the shafts, but with the emery cloth or
like material (when such is used) between, and so ou for any number of such strips
01 surface
The ins ardly projecting strips or surfaces, aforesaid, of the coupling
may be filed up slightly before being rubbed on the emery cloth, in case they are
not found to be tine enough for the rubbing upon the emery cloth to true them up
sufhciently without too much labour, or the bearing surfaces of the coupling may
be toughly trued up, before leaving the manufactory, by rubbing upon a steel
inandil roughened as a file and properly hardened
Dowels may be used entering partly within the shafts and partly within the
coupling, if desued, to give additional hold, more especially in the case of shafts of
large diameter or loose heys may be used for such purpose, let partly into
beds formed theicfo in the shafts and partly into a bed or beds formed in the
coupling
It will not in all cases be necessary to insert emery cloth or other soft material
between the beaning surfaces of the coupling and the surfaces of the shafts to ensure

page_text: tight hold of the coupling upon the shafts but it will usually be found a wise
precaution to adopt such means of increasing the "bite,' especially when no dowels
or keys are employed
In order that the invention may be readily understood, I will proceel to describe
a practical application thereof with reference to the accompanying drawings, of
which
Figure illustrates a side elevation of a coupling constructed according to this
invention,
Figure 2 a transverse section thereof taken on line a
Figure 3 an end view thereof
In Figure 1 portions of the shafts to be coupled me shewa
of Figure 1, and
in Figure 2 one of
the shafts is shewn in end elevation, and in Figure 3 one of the shafts is shewn in
transverse section
In use, these
Each half A is formed with two
The coupling consists of two halves A A, divided longitudinally
hilves are bolted around the shafts B, by bolts a
(or there may be more) longitudinal bearing surfaces, or fillets b These surfaces,
as they have left the mould in which they have been cast, may be roughly tiued up
to the cylindrical surface of the shafts by filing or by rubbing them on a mandril
above described, and may be subsequently finished by rubbing them on emery
cloth stretched over the surface of one of the shafts they are intended for
or, if
t casting is sufficiently true, such surfaces may be trued up entirely by rubbing
them upon the emery cloth Emery cloth, or other material as above defined, is
then cemented or glued to such surfaces, and the coupling is ready for use
If no
emery cloth or other material in lieu thereof is fixed against such surfaces, the
coupling will still be a sufficiently good fit to hold with considerable grip when
bolted around the shafts
When the coupling is formed, as is preferred, with curved ribs c and longitudinal
ribs d, as shewn, there is very little liability of the nuts and bolt heads being a
source of danger as the coupling revolves, but, to obviate any risk, more specially
when the coupling is in position where persons are liable to come against it, a
cylindrical case of sheet metal or other suitable material may be pushed endways
over the coupling when the same has been fixed place, and be fixed by
countersunk-headed screws or in any convenient manner
Having now particularly described and ascertained the nature of my suid inven-
tion, and in what manner the same is to be performed, I declare that what I
claim 1s
-
1 A shaft coupling formed in halves longitudinally which are capable of being
bolted around the ends of the shafts to be coupled, and each half formed with
longitudinal strips or fillets, which project from the other portions of the surface of
the hole or opening of the coupling through or along which the shafts pass, and
which form beating surfaces, substantially as described
2 The method of hitting a shaft coupling of the character defined in the preceding
claim, to the shafts for which it is intended, which comprises truing up the beating
surfaces of the longitudinal strips or fillets, either entirely by rubbing them upon
emery cloth stretched over a shaft of a diameter for which the coupling is intended,
or by treating them in such manner after they have been roughly trued up, and if
desed, in either case, subsequently cementing or glueing emery cloth, or other
woven material, brown paper, or the like, to such strips or fillets, substantially as
described
Dated this 27th day of January 1896
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.