Improvements in Means for Securing Cams, Pulleys, and other Articles upon Shafts, or for Coupling Shafts.
Year: 1896

page_text: Date of Application, 17th Aug., 1898
Complete Specification Left, 17th May, 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Means for Securing Cams, Pulleys, and other
Articles upon Shafts, or for Coupling Shafts.
We GEORGE RIOHARD PHIPPS, of 168 Stanstead Road, Forest Hill, in the
County of Kent, Ironmonger, and HENKY WILLIAM PHIPPS, of 59 Harders
Road, Peckham, in the County of Surrey, Commercial Traveller, do hereby declare
the nature of this invention to be as follows:-
This invention relates to means whereby cams, pulleys and other articles can be
quickly and firmly fixed upon shafts, or whereby shafts may be coupled together.
For securing cams, pulleys and other articles upon shafts we provide a collar,
socket or bush bored to fit the shaft and divided into longitudinal sections.
One or all of these sections may be roughened on the interior or coated or
lined with emery or other suitable substance or otherwise provided with a roughened
interior so as to grip the shaft.
The exterior of the collar, socket or bush is formed at one or at both ends with
one or more circumferential cam surfaces. At the centre the exterior of the collar,
socket or bush is formed with one or more circumferential cam surfaces oppositely
inclined to, and thicker than, the cam surface or surfaces at the end or ends of the
collar, socket or bush.
The hub of the wheel, disc, cam, or other article to be fixed on the shaft is
internally formed with cam grooves to correspond with the cam surfaces on the
exterior of the collar, bush or socket.
To secure the article to the shaft, the divided collar, socket or bush is placed in
position and the hub is then placed thercover; or the bush may be placed in the
article and then secured on the shaft thus making it suitable for split or whole
pulleys &c. The collar or bush is then partially rotated so as to cause the outer
came to grip in the grooves in the hub. The central thick cam is then secured
by means of a tapering wedge inserted between the cam and the hub, or by set
screws passed through the hub, thus preventing the article from becoming detached
whichever way the shaft may be rotated.
For coupling shafts the collar is made with a set of oppositely disposed circum-
ferential cams as above described at each end, and the hub or coupling piece is
made to correspond.
F. W. GOLBY,
36 Chancery Lane, London, W.C., Patent Agent for the Applicants.
www
Improvements in Means for Securing Cams, Pulleys, and other
Artioles upon Shafts, or for Coupling Shafts.
We, GEORGE RICHARD PHIPPS, of 168 Stanstead Road, Forest Hill, in the
County of Kent, Ironmonger, and HENRY WILLIAM PHIPPS, of 59 Harders
Road, Peckham, in the County of Surrey, Commercial Traveller, do hereby
declare the nature of this invention and in what manner the same is to be
en

page_text: performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to means whereby cams, pulleys and other articles can
be quickly and firmly fixed upon shafts, or whereby shafts may be coupled
together.
For securing cams, pulleys and other articles upon shafts we provide a collar,
socket or bush to fit the shaft and divided into longitudinal sections. One or all
of these sections may be roughened on the interior or coated with any suitable
substance so as to grip the shaft.
The exterior of the collar, socket or bush is formed at one or at both ends with
one or more circumferential cam surfaces. At the centre the exterior of the collar,
socket or bush is formed with one or more circumferential cam surfaces oppositely
inclined to the cam surface or surfaces at the end or ends of the collar, socket
or bush.
The hub of the wheel, disc, cam or other article to be fixed on the shaft is
internally formed with cam grooves to correspond with the cam surfaces on the
exterior of the collar, bush or socket.
In the accompanying drawings
Fig. 1 is an end elevation showing part of a split pulley secured on a shaft
according to our invention and
Fig. 2 is a section on the line of Fig. 1.
The same parts are lettered to correspond in both views.
In these drawings A represents the shaft and B the collar, socket or bush, which is
made in longitudinal sections; three such sections are shown in the drawings and
lettered B' B2 and B 3 but two or other suitable number may be used as desired.
The sections are preferably hinged together by means of the lugs and pins 6 and the
free ends secured by a bolt and nut, or bolts and nuts or screw or screws b¹ passed
through eyes in the flanges b 2 formed by under-cutting or recessing, as shown
at b4, the adjacent parts of the contiguous sections B1 and B 3. The inner face
of one or more of the sections is file cut or otherwise roughened to form a
gripping surface and the sections are so made that when put together they fit
the shaft.
In the example shown in the drawings each section is formed at both ends
with a circumferential cam surface 65, all running in the same direction, and one
of the sections (B 2) is shown having at or about its centre a circumferential cam
surface 66 running in the opposite direction.
The boss C of the pulley is internally formed with cam grooves o to correspond
in size and shape and position with the cam surfaces 65 on the exterior of the
bush B. The groove to receive the central surface 66 is concentrio with the
shaft A. D is a tapering key or wedge fitting into a key way formed in
the boss C.
To secure the pulley on the shaft the bush B is placed in position on the shaft A
and tightened thereon by screwing up the bolt and nut or screw b¹ and the boss C
of the pulley is then placed on the bush.. The pulley is then partially rotated
so as to cause the internal cam grooves c in the boss thereof to grip the exterior
cam surfaces 65 on the bush B. The wedge or key D is then driven in as far as
it will go, thus preventing the pulley from becoming detached whichever way the
shaft may be rotated. The cam grooves c and cam surfaces 65 prevent rotation
in one direction and the cam surface 66 and wedge D prevent rotation in the
other.
It may be necessary to modify the construction of the bush by making the outer
cam surface, or one of them as the case may be, larger than the other or others
so that the pulley boss or coupling can be passed thereover endwise and secured in
the manner hereinbefore described, the wedge being driven in from the smaller end
of the bush.
For coupling shafts the collar or bush is made with a set of oppositely disposed

page_text: circumferential cams as above described at each end, and the hub or coupling piece
is made to correspond.
It is obvious that several modifications may be made without departing from
the nature of the invention. For example, the bush may be made of any
suitable number of sections and these may be hinged together or not as required;
and the lugs 62 and bolt and nut 61 may be dispensed with, although we have
found that these latter afford convenient means for holding the bush in proper
position on the shaft while the pulley is tightened up and secured thereto. Again
the wedge may be dispensed with and set screws or other equivalent means for
securing the boss to the bush may be substituted. And again, the positions of the
cam surfaces and cam grooves may be reversed, the latter being in the exterior of
the bush while the former are on the interior of the boss or hub. These,
however, are details of construction not affecting the general character of the
invention.
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
1. Means for securing cams, pulleys or other articles upon shafts or for coupling
shafts, consisting of a bush, collar or socket to fit the shaft made in longitudinal
sections and having an external circumferential cam surface or surfaces at one or at
both ends and an oppositely disposed circumferential cam surface, adapted to fit
grooves formed in the boss or hub of the pulley or other article or in the coupling
piece and to be secured thereto by a tapering wedge inserted between the oppositely
placed cam surface and the boss or hub substantially as described.
2. Means for securing cams, pulleys or other articles upon shafts or for coupling
shafts, consisting of a divided bush or socket having oppositely disposed circum-
ferential cam surfaces, in combination with a boss or hub, on the pulley or other
article or coupling piece, formed with grooves to fit the cam surfaces on the bush
and prevent rotation in one direction, rotation in the other being prevented by a
tapering wedge inserted between the reversed cam and the boss or hub substantially
as described with reference to the accompanying drawings.
3. The combination with a cam, pulley or other article having an internally
grooved boss or hub or coupling piece, of a divided bush having external circum-
ferential cam surfaces oppositely disposed and adapted to fit the grooves in the boss
or hub, and a wedge bearing on the surface of the reversed cam and the interior of
the boss or hub substantially as described with reference to the accompanying
drawings and for the purpose stated.
4. Means for securing cams, pulleys or other articles upon shafts or for coupling
shafts consisting of a bush having oppositely disposed cam surfaces or grooves
engaging grooves or cam surfaces on the hub or boss of the article or on the
coupling piece the reversed cam being fixed by a tapered wedge or key substantially
as described.
F. W. GOLBY,
36 Chancery Lane, London, W.C., Patent Agent for the Applicants.