Improvements in Clutches or Couplings.
Year: 1892

page_text: Date of Application, 2nd Aug., 1892-Accepted, 3rd Sept., 1892
COMPLETE SPECIFICATION.
Improvements in Clutches or Couplings.
I, LJUBOMIR KLERITJ of 15 Milanstrasse, Belgrade, Servia, Professor, 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 improved shaft coupling or clutch herein described forms an easy and secure
coupling between the driving and the driven shafts without causing any shock.
For this purpose the improved coupling is constructed in the following manner
which is illustrated in the accompanying drawing.
Figure 1 represents a side-elevation partly in section.
Figure 2 a section on line Y. Y. of Figure 1, and
Figure 3 a section on line M. N of Figure 1.
The improved disconnecting coupling clutch consists of a cylindrical drum = into
which pass both the driving shaft Q and the driven shaft Q. The driven shaft is
firmly connected to the drum in the usual manner by means of two diametrically
opposite keys. The driving shaft is capable of turning freely in the drum.
The lever C is rigidly connected with the shaft Q by two keys. A second
lever c is loose on the driven shaft Q and is provided with a ring r which is
concentric with the shaft and conical on its inner surface similar to a friction
clutch. Another conical disc s fitting into the ring is made to slide loosely on the
driven shaft Q¹ but is prevented from turning on the said shaft by a feather and
keyway y. The groove m receives the clutch shifting fork R. An adjustable
ring t fixed by a set screw, prevents the lever c from moving towards the right. As
before mentioned the conical disc s can be moved to the right and left by means of
a clutch shifting fork R working in the circular groove m m. Round the drum =
is a steel spring sleeve py as shown at Figures 2 & 3, which is cut open at pg in
an axial direction so that the drum, when the driving shaft Q is disconnected, can
move freely in the sleeve. Two wire, hemp or leather ropes are wound round the
sleeve p. q in the same direction in the following manner.
The rope I starts from a guide bar A in a spiral coil round the sleeve
p. 9 and
finishes at the guide bar b of the lever c. A similar connection is made between
the guide bars B and a by the rope 1. The rigid connection of the two shafts Q
and Q is brought about in the following manner.
The cones is pressed home into the conical ring by means of the shifting
fork R. In consequence of the friction the lever c is moved round the shaft and the
ropes are tightened.
C
The tightening of the ropes causes the steel spring sleeve p q to grip the drum z
and thereby act as a brake.
The friction can be augmented by a greater number of rope coils.
The friction or gripping of the rope coils in this case does not act direct but is
transformed into the friction of the sleeve p q against the drum z.
This friction forms the driving power of the shaft Q. To disconnect the shafts Q
and Qit is only necessary to shift the conical disc s to the right.
In consequence the sleeve p. 9 springs open and releases the drum z and no
longer engages the driven shaft Q.
The effect of the coupling is when seen from Q¹ to turn to the right but it can
be made to turn in the opposite direction by coiling the ropes in the opposite way
round the drum z.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that wha I
claim is :-
A disconnecting coupling clutch characterized by a drum which runs loose or the
driving shaft but is rigidly keyed on the driven shaft, and a spring steel sleeve cut
open axially and passed over the drum, two ropes wound in the same direction
(either to the right or left) around the sleeve in order to compress the sleeve when
connection is made automatically against the drum; a lever keyed to the driving
shaft, a lever mounted loosely on the driven shaft, connections between the ends of
the ropes and said levers, and conical discs which are moved towards each other by
means of a shifting fork R for the purpose of effecting the coupling up substantially
as herein shown and described.
Dad A 1000
LJUBOMIR KLERITJ,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.