New or Improved Device Applicable for Fastening a Pulley to a Shaft or for other like Purposes.
Year: 1889

page_text: Date of Application, 6th Nov., 1889
Complete Specification Left, 15th Nov., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
New or Improved Device Applicable for Fastening a Pulley to a
Shaft or for other like Purposes.
A communication, from abroad by FRIEDRICH WILHELM KILLING, of Delstern, near
Hagen, Westphalia, in the Kingdom of Prussia, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster, and 323, High Holborn, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of this invention to be as follows :-
The object of this invention is a device which forms a light and secure fastening
for parts of machines, such as are required for fastening sheaves, etcetera, upon
transmitting or other shafts. The invention enables the parts to be easily released
and avoids projecting screws. Its use further diminishes considerably the danger of
accidents.
On the annexed drawing
:-
Figures 1 and 5 show, in elevation and section respectively, the device fitted
together ready to be placed on the shaft.
Figures 2 and 6 are similar views showing the same as fixed.
Figure 3 is an elevation of the inner, and Figure 4 the outer ring hereinafter
described.
Figures 7 7 and 8 represent the fastoning device in its application to sheaves and
similar articles, whilst in Figures 9 and 10 are represented keys suitable for
manipulating the device.
After the inner ring A is inserted into an eccentric recess in the outer ring B in
such a manner that the apertures of each register with one another (Figure 1), they
are pushed onto the shaft C and turned one inside the other by means of the
keys ZZ. The recess in the outer ring B, in which the inner ring A is placed,
is turned eccentrically to the bore hole for the shaft an the outer circumference.
of the inner ring corresponds exactly to this recess and thus is also of an eccentric
shape. On the revolving of each against the other, so great a friction takes place,
that the inner ring A is fixed so firmly both on the shaft (and also in its inserted
position as not easily to come loose therefrom, especially if the inner eccentric ring
is fitted on in an opposite direction to the direction of the shaft's revolution. The
ring A can naturally be put on from either side.
Besides being used as a flange for the transmitting shaft, the ring can also be
employed for securing sheaves. couplings, spar wheels, etcetera on an axle shaft, in
that the outer ring B is hollowed out eccentrically towards the sheave D and a pro-
jection E turned also on the hub of the sheave. In this case the projection E works
exactly like the inner ring A, that is to say, the firm fixing of the same (see Figure 7)
ensues by means of turning one against the other, or if preferred, the nave of the
sheave can be utilised as outer ring by the necessary hollowing out, and can be
secured by the insertion and twisting round of an inner ring. If it be desired to
still further secure the sheave, the inner ring A, as shown in Figure 7, is brought
simultaneously into use..
The securing of the sheave can also be performed; by arranging a fixing pin Fon
the nave of the sheave D in place of the projection E, which can be pushed into a
corresponding groove in the outer ring or by providing both ring and sheave with a
wedge groove and inserting therein a wedge G or a spring pin (sec dotted line in
Figure. 8).

page_text: This fastening device has the great advantage as a fixing ring of having no pro-
jecting screws, and further in any case where it is employed any weakening of the
shaft by the hitherto usual wedge grooves is avoided.
Besides thus considerably reducing the danger of accidents this device has the
further advantage that the sheaves, etcetera, can be more easily fastened on or
removed, because the unfastening of the rings, by means of the keys, is very
simple which does away with the often difficult removing of affixed or firmly driven
wedges.
It is to be understood that the invention is applicable to fastening other articles
besides sheaves and pulleys, such as fly-wheels or the like.
Dated this 5th day of November 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
New or Improved Device Applicable for Fastening a Pulley to a
Shaft or for other like Purposes.
A communication from abroad by FRIEDRICH WILHELM KILLING, of Delstern, near
Hagen, Westphalia, in the Kingdom of Prussia, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster and 323, High Holborn, in the County of Middlesex, Civil
Engineer, 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 :-
The object of this invention is a device which forms a light and secure fastening
for parts of machines, such as are required for fastening sheaves, etcetera, upon
transmitting or other shafts. The invention enables the parts to be easily released
and avoids the use of projecting screws. It further diminishes considerably the
danger of accidents.
In the drawing accompanying the provisional specification
Figures 1 and 5 show, in elevation and section respectively, the device fitted
together ready to be placed on a shaft.
Figures 2 and 6 are similar views showing the same as fixed.
Figure 3 is an elevation of the inner, and Figure 4 the outer ring hereinafter
described.
Figures 7 7 and 8 represent the fastening device in its application to sheaves and
similar articles, whilst in Figures 9 and 10 are represented keys suitable for
manipulating the device.
After the inner ring A is inserted into an eccentric recess in the outer ring B
in such a manner that the apertures of each register with one another, (Figure 1)
they are pushed onto the shaft C and turned one inside the other by means of the
keys Z Z. The recess in the outer ring B, in which the inner ring A is placed,
is bored eccentrically to the hole for the shaft, and the outer circumference of the
inner ring corresponds exactly to this recess, and thus is also of an eccentric shape.
On revolving one within the other, so great a friction takes place, that the inner
ring A is fixed firmly both on the shaft C and also in its inserted position and can
not easily come loose therefrom, especially if the inner eccentric ring is fitted on
in an opposite direction to the direction of the shafts revolution. The ring A can
naturally be put on from either side.
Besides being used as a flange for the transmitting shaft, the ring can also be
employed for securing sheaves, couplings, spur wheels, etcetera, on an axle shaft, the
outer ring B having in that case an eccentric recess on the side of the sheave D
(Figure 7) and an eccentric projection E turned on the nave of the sheave. The

page_text: projection E works exactly like the inner ring A, the firm fixing of the sheave
ensues by turning the ring B on the boss E, or if preferred, the nave of the sheave
can be utilized as outer ring by the necessary hollowing out, and can be secured by
the insertion and twisting round of an inner ring. If it be desired to still further
secure the sheave, the inner ring A can be used in addition as shown in Figure 7.
The securing of the sheave can also be performed by arranging a fixing pin F on
the nave of the sheave D in place of the projection E, which can be'made to engage
a corresponding eccentric groove in the outer ring, or by providing both ring and
sheave with a wedge groove and inserting therein a wedge G or a spring pin (see
dotted line Figure 8).
This fastening device has a great advantage because it possesses no projecting
screws, and any weakening of the shaft by the hitherto usual key or cotter grooves
is avoided.
Besides thus considerably reducing the danger of accidents, this device has the
further advantage that the sheaves, etcetera, can be more easily fastened on or
removed, because the unfastening of the rings, by means of the keys, is very
simple and does away with the difficulty of removing affixed or firmly driven in
keys.
It is to be understood that the invention is applicable to fastening other articles
besides sheaves and pulleys, such as fly-wheels or the like.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. A fastening or coupling device for the purpose described, comprising two
rings A and B, the inner ring A and the recess therefor in the ring B being so bored
out eccentrically in relation to the axle, and adapted to fit one another in such a way
that on revolving the said rings so as to bind one another, the necessary friction for
holding the parts firmly is obtained, substantially as set forthi.
2. In a device such as described, a ring having an eccentric recess E or projection
adapted to be received by a corresponding projection or recess as the case may be on
the sheave or other article to be secured on the shaft, and with or without the com-
bination of a second eccentric ring placed within or around the first, substantially as
and for the purposes set forth.
Dated this 14th day of November 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.