Improved Means for Mounting Split Pulleys on Shafts.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improved Means for Mounting Split Pulleys on Shafts.
I, JOHN LEOPOLD WHITE, Engineer, of 8-14, Coronet Street, Hoxton, in the
County of London, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improved means for mounting on shafts split pulleys
that have split bosses adapted to be fitted on the shaft and drawn firmly together
by end screwed rings, bolts, or other means.
The object of the present improvement is to provide more efficient and yet
inexpensive means for securing the pulloys to and quickly removing same from
the shaft when required. In carrying out my invention, within and endwise of
the split boss I form an aperture of polygonal and preferably hexagonal form
and I provide and use a number, preferably 4 for each pulley, of loose separate
segments of such shape internally as to fit well upon and grip the shaft and
externally to fit well within the aforesaid polygonal aperture in the boss. The
segments may be of cast wrought or rolled iron or steel or other suitable material
and the inner surfaces are trued up by boring when assembled together in a
casing, or secured together by clamps or otherwise. The outer surfaces may be
machined if necessary but it is not anticipated that this will be required. The
bases of one or more opposite pairs of the internal faces of the polygonal aperture
in the boss are made deeper than the rest to allow of a nipping or compressing
action on the separate segments by the tightening up operation. During and
by this operation the segments are forced inwardly and caused to strongly grip
the shaft, and thus both fixing and removal are rendered easy and efficient.
The invention is applicable equally to wood and metal pulleys or bosses.
D
Decembar 1807
Improved Means for Mounting Split Pulleys on Shafts.
I, JOHN LEOPOLD WHITE, Engineer, of 8-14, Coronet Street, Hoxton, in the
County of London, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:
My invention relates to improved means for mounting on shafts, split pulleys

page_text: that have split bosses adapted to be fitted on the shaft and drawn firmly together
by screwed rings, bolts, or other means.
The object of the present improvement is to provide more efficient and yet
inexpensive means for securing the pulleys to and quickly removing same from
the shaft when required.
I will fully describe my invention in reference to the accompanying drawings
in which Figs. 1 and 2 are respectively a side elevation and a cross-section of a
pulloy fixed on a shaft with my improved mounting, and Fig. 3 is a perspective
view of one of the loose segments hereinafter referred to.
In carrying out my invention, within and endwise of the split boss B of the
pulley A, I form an aperture b of polygonal and preferably hexagonal form, and
I provide and use a number, preferably 4 for each pulley, of loose separate
segments SS of auch shape internally as to fit well upon and grip the shaft C
and externally to fit well within the aforesaid polygonal aperture in the split
boss B. The segments S S may be of cast wrought, or rolled iron or steel or other
suitable material. The bases of an opposite pair of the internal faces of the
polygonal aperture in the boss are made deeper than the rest as shown at S to
allow of a nipping or compressing action on the separate segments S S by the
tightening up operation of screwed rings or nuts such as Ŕ screwed over the
ends of the split boss or a similar tightening operation may be accomplished by bolts
or other means. During and by this operation of tightening the segments SS are
forced inwardly and caused to strongly grip the shaft C, and thus both fixing and
reinoval are rendered easy and efficient.
The invention is applicable equally to wood and metal pulleys or bosses.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
The improved means for mounting split pulleys on shafts which consists in
forming in and through the split boss of the pulley a polygonal aperture having
its faces arranged as described for use in combination with a number of loose
separate segments adapted to fit into the said aperture and around the shaft and
to be drawn strongly together upon, and grip the shaft by the nipping and com-
pressing action of the above mentioned polygonal aperture when acted upon by
rings screwed over the ends of the split boss of the pulley, or by bolts or other
means, substantially in the manner hereinabove described and illustrated in the
drawings.
R