An Improved Clutch Connection for Machinery.
Year: 1892

page_text: Date of Application, 15th June, 1892
Complete Specification Left, 9th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
An Improved Clutch Connection for Machinery.
I, HARMAN BUNKER of the Town of Barrie in the County of Simcoe, Province
of Ontario, Canada, Inventor, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to provide an effective and easily operated clutch
connection adopted for use in all classes of machinery but especially applicable for
use in the brakes or railway cars or in other cases where steady and smooth
arrest of the motion is desirable and it consists essentially of a series of metal
strips connected to one half of a clutch and adapted to grip the cone-shaped other
half upon the necessary pressure being applied substantially as and in the manner
more particularly explained.
Figure 1 is a perspective view of my improved clutch applied to an ordinary
use in the brakes or railway cars or in other cases where steady and smooth
arrest of the motion is desirable and it consists essentially of a series of metal
strips connected to one half of a clutch and adapted to grip the cone-shaped other
half upon the necessary pressure being applied substantially as and in the manner
more particularly explained.
Figure 1 is a perspective view of my improved clutch applied to an ordinary
pulley.
Figure 2 is a longitudinal section of the clutch shown in Fig. 1.
Figure 3 is an alternative form of clutch.
Figure 4 illustrates my clutch applied to a car brake.
Like letters of reference indicate corresponding parts in each figure.
A represents a conically shaped block which is loosely journalled upon the
shaft B when it is applied as shown in Figures 1, 2 and 3 but in cases corresponding
with the application illustrated in Figure 4 this portion of the clutch would be
secured to the shaft B.
The metal strips C extending from and fixed to the sleeve D form the other
half of the clutch. This half of the clutch when applied as shown in Figures 1, 2
and 3 is fixed to the shaft B but when applied in cases such as shown in Figure 4
it is loosely journalled on the shaft so that it will not revolve therewith except
when brought into contact with the cone shaped block A as hereinafter
explained.
In Figure 1 I show two rings marked E which I rivet or otherwise connect to
at least one of the strips C so as to prevent the said strips from expanding a given
distance..
These steps it will be observed extend up the conical surface of the block A
and form a series of gripping points when the sleeve D to which they are attached
is adjusted longitudinally upon the shaft so as to force the said strips upon the cone
shaped block A the rings E preventing their expansion beyond a given point. By
thus forming a series of gripping points and oiling the cone against which they grip
I find that I secure a smooth soft grip which will give the necessary connection
without in any way jarring the machinery so connected.
In Figure 3 I show the metal strips C connected to the conically shaped
block A and the sleeve D formed like a conical cup into which the block A and
the strips C fit as indicated.
In some classes of machinery this form of connection will be advantageous but
in any case it is the same principle as the other construction illustrated.
In Figure 5.I show another alternative form of clutch. In this figure I show
the ends of the strips C coiled outwardly and forming a series of loops which are
joined together by the ring K. Each strip C will thus have an independent motion
to the extent permitted by the spring in the loops J but their spring is limited by
the action of the ring K.
In order that the clutch may instantly release itself the moment that the pressure
between the two halves of the clutch is removed I place a spring F between the
block, A. and sleeve D and in, order that the necessary pressure may be properly

page_text: applied I provide a pivotted lever G connected to the sleeve D by the fork con-
nection H commonly used for adjusting clutches. In Figure 4 I show my improved
clutch connection applied to a car. In this application I use the brake chain I
which winds around the strips C the instant that the sleeve D is adjusted longi-
tudinally to produce the necessary contact with the cone block A.
Dated this 15th day of June 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.
Coy deciate the tature 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 the invention is to provide an effective and easily operated clutch
connection adapted for use in all classes of machinery but specially applicable for
use in the brakes of railway cars or in other cases where steady and smooth arrest
of the motion is desirable and it consists essentially of a series of metal strips con-
nected to one half of a clutch and adapted to grip the cone shaped other half upon
the necessary pressure being applied substantially as and in the manner more
particularly explained.
Figure 1 is a perspective view of my improved clutch applied to an ordinary
pulley.
Figure 2 is a longitudinal section of the clutch shown in Figure 1.
Figure 3 is an alternative form of clutch.
Figure 4 illustrates my clutch applied to a car brake.
Like letters of reference indicate corresponding parts in each figure.
A represents a conically shaped block which is loosely journalled upon the
shaft B when it is applied as shown in Figures 1, 2 and 3 but in cases corresponding
with the application illustrated in Figure 4 this portion of the clutch would be
secured to the shaft B.
The metal strips C extending from and fixed to the sleeve D form the other half
of the clutch. This half of the clutch when applied as shown in Figures 1, 2 and 3
are fixed to the shaft B but when applied in cases such as shown in Figure 4 it is
loosely journalled on the shaft so that it will not revolve therewith except when
brought into contact with the cone shaped block A. as hereinafter explained.
In Figure I show two rings marked E which I rivet or otherwise connect to at
least one of the strips C so as to prevent the said strips from expanding a given
distance. These steps it will be observed extend up the conical surface of the
block A and form a series of gripping points when the sleeve D to which they are
attached is adjusted longitudinally upon the shaft so as to force the said strips
upon the cone shaped block A the rings E preventing their expansion beyond a
given point. By thus forming a series of gripping points and oiling the cone
against which they grip I find that I secure a smooth soft grip which will give the
necessary connection without in any way jarring the machinery so connected.
In Figure 3 I show the metal strips C connected to the conically shaped block A
and the sleeve D formed like a conical cup into which the block and the
strips C fit as indicated.
In some classes of machinery this form of connection will be advantageous but
in any case it is the same principle as the other construction illustrated.
In Figure 5 I show another alternative form of clutch. In this figure I show
the ends of the strips C coiled outwardly and forming a series of loops J which are

page_text: joined together by the ring K.
to the extent permitted by the
the action of the ring K.
Each strip C will thus have an independent motion
spring in the loops J but their spring is limited by
In order that the clutch may instantly release itself the moment that the
pressure between the two halves of the clutch is removed I place a spring F
between the block A. and sleeve D and in order that the necessary pressure may
be properly applied I provide a pivotted lever G connected to the sleeve D by the
fork connection H commonly used for adjusting clutches. In Figure 4 I show my
improved clutch connection applied to a car. In this application I use the brake
chain I which winds around the strips C the instant that the sleeve D is adjusted
longitudinally to produce the necessary contact with the cone block A.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A clutch consisting of a series of metal strips connected to one half of it and
adapted to grip the cone shaped other half upon the necessary pressure being
applied substantially as and for the purpose specified.
2. A clutch consisting of a series of metal strips connected to one half of it and
adapted to grip the cone shaped other half in combination with a ring or chain
arranged to surround the said metal strips substantially as and for the purpose
specified.
3. A series of metal strips C having coiled ends J connected to a ring K and
forming one half of the friction clutch substantially as and for the purpose
specified.
Dated this 0th day of A vous 1809
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.