Improvements in and relating to Shaft Couplings.
Year: 1898

page_text: Improvements in and relating to Shaft Couplings.
JOHN LINNEY, of Trent Boulevard, Nottingham, Engineer, and CHARLES
WILLIAM HOLLIS, of 3, Wellington Square, Nottingham, Engineer, do hereby
declare the nature of this invention to be as follows:-
"
This invention has reference to improvements in and relating to "grip" or
muff" couplings for connecting together the ends of shafts; the object of the
"muff
invention being the construction of a simple and efficient "grip" or
coupling by which power can be transmitted from one shaft to another without
the use of keys or their equivalent.
According to this invention the coupling is preferably made in one piece and
is fixed to the shafts by a frictional grip which may be obtained by screws or
bolts, or, partly by screws or bolts and partly by the elasticity of the material of
which the coupling is made. In one arrangement the coupling is divided at one
side longitudinally by a saw or the like and the divided edges are drawn towards
each other by screws or bolts. In another arrangement the coupling is divided
longitudinally at two or more places, but when this is done none of the divisions
extend the full length of the coupling.
In addition to the longitudinal division, or divisions, the coupling may be
divided by one or more transverse divisions.
The coupling may be balanced by removing metal from the heaviest side, and
screws or the like may be provided for opening the divisions to allow of the
coupling being fixed upon or removed from the shafts and for this purpose one
or more of the clearance holes for the fastening bolts or screws may be tapped.
Dated this 8th day of November 1898.
Improvements in and relating to Shaft Couplings.
JOHN LINNEY, of Trent Boulevard, Nottingham, Engineer, and CHARLES
WILLIAM HOLLIS, of 3, Wellington Square, Nottingham, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
"
This invention has reference to improvements in and relating to grip" or
“muff” couplings for connecting together the ends of shafts; the object of the

page_text: "
invention being the construction of a "grip" or muff" coupling by which
power can be transmitted from one shaf to another without the use of keys cr
their equivalent.
According to this invention the coupling is made in one piece and is fixed
to the shaft by a frictional grip. In one arrangement the coupling is divided at
one side by a longitudinal cut and the divided edges are drawn towards each
other, when the coupling is on the shaft, by screws, bolts or the like. In another
arrangement the coupling is divided at one side by a longitudinal cut, and is
also partially divided by one or more transverse cuts so that one section of the
coupling can be, to a certain extent, tightened upon the shaft independently of
the other section or sections. The coupling may also be made with more than
one longitudinal cut.
In the accompanying drawings Fig. 1 is an end elevation and Fig. 2 is a plan
of a coupling provided with one longitudinal cut. The coupling a which is of
cast iron is cast in one piece and after being boxed and turned is
divided at one side by a cut b. The coupling is also drilled and tapped for
screws c and when in position on the shafts is tightened thereon by the screws
which tend to close the cut b and so produce a frictional grip between the shafts
and the coupling. In the coupling shown in Fig. 3 and 4 there is, in addition
to the longitudinal cut a transverse cut whereby the frictional grip on one
shaft is, to a certain extent, independent of the grip on the other shaft.
Bolts and nuts may be used instead of screws if desired, the coupling may be
of any suitable metal and may be provided with screws for separating the cut
sides so as to facilitate the placing in position and removal of the coupling.
In a modification the coupling may have more than one longitudinal cut such
cuts extending from one end to about the centre of the coupling, and the cuts
at one end being arranged in different planes to the cuts at the other end, while
each cut is provided with a set of screws or bolts.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
1. A coupling for shafts made in one piece provided with one or more longi-
tudinal cuts and suitable screws or bolts substantially as herein described and
operating as set forth.
2. A coupling for shafts constructed, arranged and operating substantially as
herein described with reference to Fig. 1 and 2 of the accompanying drawings.
3. A coupling for shafts constructed, arranged and operating substantially as
herein described with reference to Fig. 3 and 4 of the accompanying drawings.
Dated this 4th day of August 1899.