Improvements in Friction Clutches.
Year: 1894

page_text: Date of Application, 18th Jan., 1894
Complete Specification Left, 11th May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Friction Clutches.
CHRISTIAN KÖRTE 36 Victoria Road Holbeck Leeds Engineer ROBERT
HARRISON 36 Victoria Road Holbeck Leeds Gentleman do hereby declare
the nature of this invention to be as follows:-
This invention has for its purpose the construction of a friction clutch, having a
greater amount of clearance when out of gear, than usually can be obtained in
friction clutches, and the means by which this purpose can be attained.
The clutch is constructed as follows, it consists of an outer shell bored out slightly
conicaly and made deeper in width than the expansion friction ring working in the
shell. This ring is connected by arms to a centre box sliding on the shaft on
feather keys.
The ring is expanded in the usual way by screws and levers, but on the
expanding screws spiral springs are fastened which always try as they are
connected to the lever on screw to turn the lever into a position, in which the
clutch ring would not grip in its shell. If the clutch is out of gear it is pulled
out of its shell and the clutch ring is therefore quite clear of the shell, if it is
wanted to put the clutch into gear,, the clutch can be pressed into its shell without
being expanded, as the spiral springs offer a resistance against the turning of the
screws the expansion ring is therefore first pressed into its shell and by a continued
pressure which overcomes the spiral springs and turns the screws tightened in its
shell.
Dated this 17th day of January 1894.
CHRISTIAN KÖRTE.
ROBERT HARRISON.
CUMILLE DIEUITIVATION.
Improvements in Friction Clutches.
CHRISTIAN KÖRTE of 36 Victoria Road Leeds Mechanical Engineer ROBERT
HARRISON of 36 Victoria Road Leeds Woollen Manufacturer 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 :-
This invention has for its object an improvement in friction clutches which
enables the clutches to get more clearance of the driving parts when out of
gear.
It consists of friction straps firmly connected in some way to their centre boss,
and split in one or more parts so as done before. These straps which form with
the centre boss to which they are connected, an elastic disk, slightly conical on its
circumference, and are enabled by a special arrangement to slide along the shaft
on one or more feather keys, so that they can enter the conical cup provided for
them and can be tightened in the same and in such a way connect or disconnect
wheels, shafting, etc. to and from the driving motor.
To obtain this end the elastic clutch ring is provided on the splits with a screw
working in a nut fixed in one end of the split parts of it, and the screw is also
provided with a lever fastened to the same, if this lever is turned it turns as well
the screw moving it out of its nut and by doing so expands the elastic straps and
tightens the same into the cup provided for them.

page_text: This screw is also provided with some kind of an appliance which offers a certain
resistance against the turning of it, the purpose of this appliance is to prevent the
elastic disk when drawn out of its cup to expand in sliding along the shaft, as such-
an expansion would prevent the elastic-slightly-conical-disk to enter into its cup.
This resistance can be created in different ways, some of them will be described
further on.
Having now described the nature of our said invention, I explain the same
further by annexed drawings.
In these drawings, means Fig. 1, a front view and a length section of the clutch.
In these views, shows A, the cup for the reception of the elastic-split-disk
marked B, which is turned slightly conical and fits into the cup A.
The split disk B is fittted with a screw working in a thread contained in the cast
iron arm at one side of the split, this screw, which is marked D, is provided with a
lever C so when this lever C is turned the screw D turns with it.
To offer a certain resistance against the turning of C and D, a spring E is fixed
into the lever with one end and with the other end into the free end of the friction
strap forming the elastic disk B.
This spring will therefore offer the necessary resistance to prevent the elastic
disk B to expand before this disk B has been moved into its cup A, after that has
been done a stronger pressure on C will overcome the resistance offered by the
spring E, turn the lever and screw and by doing so expand the elastic disk and
tighten the disk B into its cup A.
Fig. 2 shows the arrangement in detail and is a section through the arrangement
just described, the expansion ring B carries the thread for the screw marked E
which turns in the nut F. The lever C is fixed to this screw and the spiral
spring D is fastened with one end to the lever C and with the other end to a nut G
which fast in the elastic end of the strap forming the elastic disk B and offers so
the necessary resistance against the lever C being turned and the elastic disk being
expanded.
The screw H is an adjusting screw by means of which any wear of the expansion
ring can be taken up, a small rod penetrates the screw E and binds both sides of
the elastic disk B together, so to counteract centrifugal force. The. resistance
against turning may also be arrived at by making the expansion straps of special
form or strength.
Fig. 3 shows the same principle but differently arranged, the screw is here
vertical and does not act directly upon the elastic disk B but does act upon the
wedge piece E and by moving this piece E upwards expands B. To offer a certain
resistance against a too early expansion, before B would be in its cup, the shaft of
the screw D is provided with a little notch into which is pressed a round pin by
the spring F, the round pin is marked G.
To turn the lever C, the spring F has to be lifted against which it offers a
certain resistance.
Fig. 4 shows the same principle but on the lever G a spring is fixed direct,
marked D, offering the resistance against the turning of the screw.
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 :
A friction clutch constructed as herein-before explained, and described, which is
fitted with certain appliances to enable the elastic disk to be withdrawn and moved
without expanding the same. All as herein-before explained and described.
Dated this 10th day of May 1894.
CHRISTIAN KÖRTE.
ROBERT HARRISON.