Improvements in Collars for Shafts or Apparatus for Embracing and Securing the Bosses of Split Pulleys upon Shafts and for other Analogous Purposes.
Year: 1887

page_text: Date of Application, 30th July, 1887
Complete Left, 28th Apr., 1888
Complete Accepted, 1st June, 1888
Improvements in Collars for Shafts or Apparatus for Embracing
and Securing the Bosses of Split Pulleys upon Shafts and for
other Analogous Purposes.
I EDWARD MURGATROYD of 45, Every Street, Nelson, near Burnley in the County
of Lancaster, Engineer, do hereby declare the nature of my invention to be as
follows:-
The object of this invention is the novel construction and arrangement of parts
constituting a split or divided collar for surrounding and securing the boss of say
a split pulley upon a line shaft without removing such shaft from its bearings or for
surrounding the boss of any wheel say a fractured boss and thus of strengthening the
same also as a collar for shafts or for any analogous purpose.
In performing my invention I construct the improved collar of say cast or wrought
iron brass or other suitable metal in two halves with corresponding rebated or over-
lapping parts on each half. The adjoining faces of these overlapping parts at each
side are provided the one with a projecting dovetail wedge (arranged transversely
with the axis of this collar) slightly tapering in the direction of its length and the
other with a corresponding dovetailed groove formned therein so that when placed
together at opposite sides of and so as to embrace the shaft the one half of the coupling
is capable of sliding sideways upon the other so as to lock together and then the
complete collar is capable of being passed forwards and driven tight say on to the
boss of the large diameter of the split pulley or other wheel-or such collar could
be screw threaded in its bore and so as to screw on to the boss of the wheel or other
part requiring to be embraced thereby.
1 1
50.1 1
TI
1007
JOHN G. WILSON,
Agent for the Applicant.

page_text: Improvements in Collars for Shafts or Apparatus for Embracing
and Securing the Bosses of Split Pulleys upon Shafts and for
other Analogous Purposes.
I EDWARD MURGATROYD of 45. Every Street, Nelson, near Burnley in the County
of Lancaster, Engineer do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
The object of this invention is the novel construction and arrangement of parts
constituting a split or divided collar for surrounding and securing the boss of say a
split pulley upon a line shaft without removing such shaft from its bearings or for
surrounding the boss of any wheel say a fractured boss and thus of strengthening the
same also as a collar for bosses or shafts or for any analogous purpose.
On the accompanying drawing Fig. 1 is a front view and Fig. 2 a side or edge
view of my improved split or divided collar. Figs. 3 and 4 represent side and front.
. views respectively of the two parts of the same collar shewn separated. Fig. 5 is a
front view and Fig. 6 a side sectional view of a split pulley shewing the same collar
(on a smaller scale) applied to one of the bosses of such pulley.
I construct my improved collar of cast or wrought iron; brass or other suitable metal
in two halves or half circles a and b and with corresponding rebated or overlapping
parts c and d on each half as illustrated. The adjoining faces of these overlapping
parts at each side are provided the one with a projecting dove-tail wedge e (arranged
transversely with the axis of this collar) slightly tapering in the direction of its length
and the other face is furnished with a corresponding dove-tailed groove f so that when
placed together at opposite sides of and so as to embrace or surround say the shaft
-the one half of the coupling is capable of sliding sideways upon the other so as to
lock together.
9
The complete collar is now capable of being passed forwards and driven tight say
on to the (slightly tapering) boss h of the split pulley i as illustrated in Figs. 5 and 6
and thus the two parts of such boss are effectually drawn into contact and secured
together.
In some cases I form a screw thread in the bore of the collar as indicated in the
right hand divided collar marked ; in Fig. 6 of the drawing and thus 1 constitute
the collar a divided nut for screwing on to the boss of the split pulley and which boss
for this purpose is furnished with a corresponding male screw thread.
In Fig. 7 illustrate an exterior view and in Fig. 8 a side sectional view of a split
coupling box or casing say for enclosing the flanged coupling k of a screw shaft of
a steam vessel and shewing the application of a pair of my improved divided collars m
in securing the two parts n and o of such box or casing together. In this manner and
by the use of my improved coupling arrangement facility is afforded for coupling a
fractured shaft as indicated by the broken line -q in Fig. 8 or for strengthening or

page_text: stiffening a screw or other shaft in any position along its length and thus of considerably
lessening the vibration of such shaft or a split or divided boss on this principle can
also be used in conjunction with my divided collar as a coupling for connecting together
two lengths of shafting. It will be obvious that this improved coupling box and
collar being perfectly cylindrical on the outside can be utilised along any portion or
the whole length thereof as a bearing surface. Although I have only illustrated my
invention as applied to split pulleys and coupling boxes it will be apparent that my
improved divided collar is equally applicable for surrounding and securing the
boss of any other class of wheel geared or otherwise or for any other analogous
purpose.
Having thus particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1st. The improvements in collars for split or divided bosses and for securing the
same upon shafts substantially as and for the purposes herein before described.
2nd. In the construction of a divided collar the employment of two parts rebated
and fitted to lock together substantially as hereinbefore described and illustrated on
the accompanying drawings.
3rd. The use and application of my improved divided collar for surrounding and
securing the boss of a split pulley, wheel or other fixing upon a shaft or for other
analogous purposes substantially as herein before described.
JOHN G. WILSON,
Patent Office,
55, Market Street, Manchester,
Agent for the Applicant.