A NEW OB IMPROVED COUPLING FOR SHAFTING
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Peter Brotherhood at the
Office of the Commissioners of Patents on the 17th October 1883.
PETER BROTHERHOOD of Belvedere Road Lambeth in the County of Surrey
"A NEW OB IMPROVED COUPLING FOR SHAFTING
"
My invention relates to means of coupling two lines of revolving shafting
together so as to allow for error of allignment, and give certain freedom for end
play and also certain elasticity of driving. For this purpose, I clamp between
flanges fixed on the end of the one line of shafting and between smaller flanges
fixed on the end of the other line, a diaphragm of leather, caoutchouc or other
somewhat flexible and elastic material, there being between the one set of flanges
and the other set a free annulus of this material which can bend and spring a
little, so as to allow for obliquity or end play of the shafts, and also to convey
the driving strain elastically from the one shaft to the other. Several such
couplings may be applied between the two lines of shafting, when it is desired to
give increased play and elasticity, or to allow for increased obliquity. Instead of
applying the elastic material as a disc or annulus, it might be applied in the form
of a cylindrical shell. Where considerable strains are transmitted through the
coupling, several thicknesses of the elastic material may be used, and when it is
of large diameter it may be applied in segments, in several layers breaking joint
and secured together by rivetting or lacing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Peter Brotherhood in the Patent Office on the 10th April 1884.
PETER BROTHERHOOD of Belvedere Road Lambeth in the County of Surrey
"A NEW OR IMPROVED COUPLING FOR SHAFTING
"
My invention relates to means of coupling two lines of revolving shafting
together so as to allow for error of allignment and give certain freedom for end
play and also certain elasticity of driving. For this purpose, I clamp between
flanges fixed on the end of the one line of shafting and between smaller flanges
fixed on the end of the other line, a diaphragm of leather, caoutchouc, or other
somewhat flexible and elastic material, there being between the one set of flanges
and the other set a free annulus of this material which can bend and spring a
little, so as to allow for obliquity or end play of the shafts and also to convey the
driving strain elastically from the one shaft to the other. Several such couplings
may be applied between the two lines of shafting, when it is desired to give
increased play and elasticity, or to allow for increased obliquity. Instead of
applying the elastic material as a disc or annulus, it might be applied in the form
of a cylindrical shell. Where considerable strains are transmitted through the
coupling, several thicknesses of the elastic material may be used, and when it is of
large diameter, it may be applied in segments in several layers breaking joint and
secured together by rivetting or lacing.
Fig. 1 of the accompanying drawings is a section and Fig. 2 a front view of a
coupling according to my invention. A is part of one shaft, and B is part of the
other shaft coupled to A. On A and B are fixed bosses having flanges C and D
to which is clamped, by means of rings E and F secured by screws, a diaphragm G
of leather, caoutchouc or other somewhat flexible and elastic material. The
elasticity of the free annulus of G between the clamped parts gives a little freedom
allowing for small errors of position or allignment of the two shafts, and for slight
variations of their respective speeds.
When the shafts have to transmit considerable power, as for example for driving
a screw propeller, the construction shewn by the section Fig. 3 and the front view
Fig. 4 may be adopted. In this case, a flange C₁, preferably of steel, is fixed on
the coupling disc of the one shaft, and to this and to the flange D of the other
coupling disc is clamped a ring of annularly corrugated steel G, preferably made in
two thicknesses, each thickness being made in halves, and the two thicknesses
being clamped together in such a position as to break joint.
Having thus described the nature of my invention and in what manner the
same is to be performed, I claim :-
The construction of coupling for connecting two lines of revolving shafting,
with a diaphragm of somewhat flexible and elastic material clamped at its
periphery to a flange on the one shaft, and at its middle to a flange on the
other shaft, substantially as and for the purposes herein set forth.
In Witness whereof I the said Peter Brotherhood have hereunto set my hand
and seal this seventh day of April in the year of our Lord One thousand eight
hundred and eighty-four.