Improvements in Shaft Couplings.
Year: 1891

page_text: Date of Application, 31st Mar., 1891
Complete Specification Left, 28th Dec., 1891-Accepted, 30th Jan., 1892
PROVISIONAL
SPECIFICATION.
Improvements in Shaft Couplings.
I JOSEPH GROVE of 44 Gopsal Street, in the City of Birmingham Engineer'
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in what are generally known as sleeve
couplings, and consists in the combination and arrangement of the parts as
follows
:--
An outer cylindrical muff or barrel is provided, the external shape of which may
be varied to suit as a pulley or toothed wheel if desired. The inside of this barrel
is formed into two parts, that is, for about half its length it is turned parallel, and
to a diameter large enough to permit of a sliding sleeve and a bush occupying them-
selves therein, between it and the shaft. The other half is turned to a taper form,
having its larger diameter at the centre of the barrel, and large enough also to
receive between itself and the shaft a second bush. The sliding sleeve as aforesaid
is now made to fit freely within the enlarged interior of the barrel, and having
its inside of a taper form equal in size and shape to the aforesaid tapered
interior of the other end of the barrel. Holes are provided in this sleeve,
and also corresponding thereto, similar holes are provided in the opposite part
of the barrel, to receive bolts. By means of these bolts the sleeve is pressed
inwards.
Again. Between the barrel at the one end, and the sleeve at the other end, and
the shafts, are two bushes, the outsides of which are tapered and fit the barrel and
the sleeve respectively, and their insides fit the shafts. These bushes are com-
pletely cut through on one side so as to give them elasticity.
In coupling two shafts together, a bush is first passed on to the end of each
shaft; the barrel is then passed on to one of these bushes, then the sleeve is passed
into the other end of the barrel between it and the second bush, when the bolts are
screwed up, thus drawing the sleeve and barrel on to the two tapered surfaces of
the bushes tightly, which latter by reason of their elasticity grip and firmly hold
the said shafts.
It will be thus seen that in this arrangement the tapered bushes remain
stationary, that is, do not slide along the shaft during the screwing up operation.
Absolute equality of size of the shafts is unnecessary, as to a certain extent the
elasticity of the bushes will permit of accommodation, while in greater differences,
varying internal sized bushes may be used.
To obviate any difficulty of disconnection I may provide one or more holes
parallel to and lying between the aforesaid bolt holes in the barrel part, so that a
drift &c. may be driven against the sleeve to remove it from off its bush.
I some cases I may make the two bushes in one piece, and proceed as before
described.
Dated this 28th day of March 1891.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Shaft Couplings.
I, JOSEPH GROVE formerly of 44 Gopsal Street in the City of Birmingham,
Engineer, now residing at 74 Strahan Road, Grove Road, Bow, London, E., do
hereby declare the nature of this invention and in what manner the same is to be
Price 6d \

page_text: performed, to be particularly described and ascertained in and by the following
statement:—
This invention relates to improvements in what are generally known as sleeve
couplings and consists in the combination and arrangement of the parts as
follows:-
An outer cylindrical muff or barrel is provided, the external shape of which may
be varied to suit as a pulley or toothed wheel if desired. The inside of this barrel
is formed into two parts, that is for about half its length it is turned parallel and
to a diameter large enough to permit of a sliding sleeve and a bush occupying
themselves therein between it and the shaft. The other half is turned to a taper
form having its larger diameter at the centre of the barrel and large enough also
to receive between itself and the shaft a second bush. The sliding sleeve as
aforesaid is now made to fit freely within the enlarged interior of the barrel and
having its inside of a taper form equal in size and shape to the aforesaid tapered
interior of the other end of the barrel.
Holes are provided in this sleeve, and also corresponding thereto, similar holes
are provided in the opposite part of the barrel to receive bolts. By means of these
bolts the sleeve is pressed inwards.
Again (see the drawing in which Fig. 1. is a side elevation and Fig. 2. a section
on A B.) between the barrel C at the one end and the sleeve D at the other
end and the shafts E. E¹, are two bushes F. F', the outsides of which are
tapered, and fit the barrel C. and the sleeve D. respectively and their insides
fit the shafts. These bushes are completely cut through on one side so as to give
them elasticity.
In coupling two shafts together, a bush is first passed on to the end of each
shaft the barrel is then passed on to one of these bushes, then the sleeve is passed
into the other end of the barrel between it and the second bush, when the bolts are
screwed up, thus drawing the sleeve and barrel on to the two tapered surfaces of
the bushes tightly, which latter by reason of their elasticity grip and firmly hold
the said shafts.
It will be thus seen that in this arrangement the tapered bushes remain
stationary, and likewise the shafts, that is the bushes do not slide along the shafts,
neither do the shafts revolve, during the screwing up operation.
Absolute equality of size of the shafts is unnecessary as to a certain extent the
elasticity of the bushes will permit of accommodation, while in greater differences
bushes varying in size internally may be used.
To obviate any difficulty of disconnection I may provide one or more holes
parallel to, and lying between, the aforesaid bolt holes in the barrel part so that a
drift, etc. may be driven against the sleeve to remove it from off its bush.
In some cases I may make the two bushes in one piece and proceed as before
described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
A shaft coupling having tapered bushes and tapered sleeves drawn together
by means of bolts, substantially as arranged and shown on the accompanying
drawing.
Dated this 28th day of December 1801
JOSEPH GROVE.