Improvements in Couplings for Shafting, applicable also for Securing Pulleys and Wheels on Shafts.
Year: 1891

page_text: Date of Application, 19th Dec., 1891
Complete Specification Left, 17th Sept., 1892-Accepted, 22nd Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Couplings for Shafting, applicable also for
Securing Pulleys and Wheels on Shafts.
We, BARRY HENRY AND COMPANY, LIMITED, of Aberdeen Iron Foundry, in
the City and County of Aberdeen and ALEXANDER GUILD, Engineer to said
Company, do hereby declare the nature of our invention to be as follows:-
This invention has reference to and comprises certain improvements in mode of
coupling shafting and in the construction of the couplings and their fittings for
carrying out the same, which will keep the shafting true; while each coupling
will be removable and suitable for slightly different sizes of shafting. The
improvements are also applicable for securing pulleys and wheels on shafts, without
requiring securing keys or key seats.
As applied to shafting the improvements consist in forming an annular sleeve,
preferably of steel made the whole length of both parts of the coupling at the
joint ends of the shafting to be coupled, bored parallel on the inner surface to near
the size of the shafts, and slightly tapered conoidally on the outer circumference
smallest at the ends and largest at the centre, and of the same taper at both ends
to suit the bored tapered eyes of both parts of the couplings. The parts of the
couplings would also preferably be made of steel and with strong projecting
flanges at their adjacent ends with bolts passing through them to draw the parts
together over the sleeves which would be slit up one side longitudinally from
to inch wide, and the sleeve eye piece made thin enough to yield and slip freely
over the two adjacent ends of the shaft, so that the eyes of the outer coupling
parts would be shipped over both ends of the conical sleeve and be drawn up
towards each other by the bolts, and this would tighten the sleeve hard up over the
ends of the shafts to grip them perfectly tight.
A further improvement consists in grooving or fluting the inner and outer
surfaces of the tapered sleeve, or it may be only one of said surfaces, which will
enable the bearing parts between the grooves to grip the surface of the shafts and
eye of the coupling better than if the whole surface was left plain. In some cases
a hole may be bored with a pin in it through the joint ends of the shafts, to prevent
or relieve the strain on the bolts and fitted so that the strain would be put on said
pin and would act as a driver at the two ends of the shaft. The two parts of the
coupling would then be screwed up and have a space always between them for
being so tightened up by their bolts, which would have lock nuts or other
equivalent to prevent them from slackening back when once tightened up. A steel
pin might be inserted in one of the couplings to pass into a hole in the other and
retain them also in line, so that the one would have no tendency to turn without
the other, when the bolts were not made to fill their holes in the flanges.
This improved double angled split sleeve can also be applied to the eyes of
pulleys and wheels whereby either can be secured to their shafts without keys.
When so applied to pulleys and their wheels these are made in the following
manner:-
The pulleys or wheels are cast with only one half length of boss, and bored
with a taper, same as in the case of the coupling to suit one end of the sleeve, the
other half of the boss is made loose and bored to suit the opposite tapered end of
the sleeve and both parts of the boss or arms fitted with holes and bolts passing
through them and the loose flanged half, whereby both halves are drawn on to the
sleeve by the bolts and secured by the lock nuts. By adopting this method a stock
of pulleys and wheels can be kept with sleeves of different bores to suit different
sizes of shafts and when the sleeves are too thick to spring, they can be cut

page_text: longitudinally into two or more sectional parts to be tightened up by the two
tapered parts of the eyes of the pulleys or wheels.
Dated the 18th December 1891.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Couplings for Shafting, applicable also for
Securing Pulleys and Wheels on Shafts.
We, BARRY, HENRY AND COMPANY, LIMITED, of Aberdeen Iron Foundry, in
the City and County of Aberdeen, and ALEXANDER GUILD, Engineer to said
Company, do hereby declare the nature of our invention, and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement in writing, that is to say :-
This invention has reference to and comprises certain improvements in the mode
of coupling shafting and in the construction of the couplings and their fittings for
carrying out the same, which will keep the shafting true; while each coupling will
be removable and suitable for slightly different sizes of shafting. The improve-
ments are also applicable for securing pulleys and wheels on shafts, without
requiring securing keys or key seats.
And in order that our said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, we have hereunto
appended an explanatory sheet of drawings in which
Figure 1 represents a longitudinal elevation, partly in section, showing our
improvements applied for coupling the two ends of a line of shafting. While
Figure 2 is an end view corresponding to Figure 1.
:-
Referring to these drawings -The improvements consist in forming an annular
sleeve a, preferably split at all, and made of steel, or cast iron and continued the
whole length of both parts A, A', of the coupling at the joint ends B2 of the
shafting B, B', to be coupled. The sleeve « is angled or tapered on its outer
circumference from the centre smaller both ways towards the two ends of the
coupling parts A, A', which are correspondingly tapered on their receiving eyes to
grip the sleeve a, and the sleeve is made parallel on the inner circumference. This
sleeve a may be plain but would preferably be corrugated or fluted in the
longitudinal direction on both its inner and outer surfaces a¹, a², so as to sink
the narrow or sharp bearing edges and as a spring ring grip the surface of the
shafts B, B, and the eye of the coupling A, A In some cases a hole may be
bored with a pin in it at B3" through the joint ends of the shafts B, B1, to prevent
or relieve the strain on the bolts A" and fitted so that the strain would be put on
said pin and would act as a driver at the two ends of the shaft. The two
parts A, A, of the coupling would then be screwed up and have a space A, always
between them for being so tightened up by the bolts A", passing through their
flanges A, and the bolts would preferably have lock nuts A or other equivalent
to prevent them from slackening back when once tightened up.
A steel pin or
pins A³ might be screwed or inserted in one of the coupling parts as A', to pass
into a hole in the other part A, and retain them also in line, so that the one would
have no tendency to turn without the other, when the bolts A¹, were not made to
fill their holes in the flanges A
This improved double angled split sleeve a can also be applied to the eyes of
pulleys and wheels whereby either can be secured to their shafts without keys.
When so applied to pulleys and their wheels they are made in the following
manner :-
The pulleys or wheels are cast with only one half length of boss, and bored
with a taper, same as in the case of the coupling to suit one end of the sleeve a
the other half of the boss is made loose and bored to suit the opposite tapered end

page_text: of the sleeve a and both parts of the boss or arms fitted with holes and bolts
passing through them and the loose flanged half, whereby both halves are drawn
on to the sleeve by the bolts and secured by the lock nuts. By adopting this
method a stock of pulleys and wheels can be kept with sleeves of different bores to
suit different sizes of shafts and when the sleeves are too thick to spring, they can
be cut longitudinally into two or more sectional parts to be tightened up by the two
tapered parts of the eyes of the pulleys, wheels, or couplings.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. The constructing of couplings for shafting and for securing pulleys and
wheels on shafts with an annular sleeve between them and the shafting, substan-
tially as herein described in reference to and shown in the accompanying drawings.
Second. The constructing of couplings for shafting and pulleys and wheels with
tapered eyes to embrace a double angled or tapered split sleeve surrounding the
shafting, substantially as herein described in reference to and shown in the
accompanying drawings.
Third. The constructing of couplings for shafting and for securing pulleys and
wheels on shafts with an annular sleeve having parallel bored grooves or
corrugations on its surfaces to grip the shafting and eyes of the coupling parts,
substantially as herein described in reference to and shown in the accompanying
drawings.
Dated the 15th September 1892.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.