Improvements in and relating to Clutches, Brakes, and the like.
Year: 1892

page_text: Date of Application, 16th Feb., 1892
Complete Specification Left. 10th Nov. 1892-Accepted. 10th Dec.. 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Clutches, Brakes, and the like.
We, EDWARD SHAW, of Ashton Gate, in the City and County of Bristol,
Engineer, and GEORGE JOHN HARCOURT, of 5 Albert Villas, Clifton, Bristol,
aforesaid, Gentleman, do hereby declare the nature of this invention to be as
follows :-
This invention relates to clutches, brakes and the like, and has relation to former
inventions for which Letters Patent were granted to us, namely, No. 15871 of 1887 ;
No. 20613 of 1889; and No. 20734 of 1890.
Our present invention has special reference to clutches known as cone clutches,
and to brakes and like appliances constructed on similar principles.
According to one arrangement comprised in this invention the cones, instead of
being as heretofore made each in one piece, are made up of a strip or bar coiled.
Cones so made possess greater flexibility and are capable of expansion and con-
traction in diameter.
When one such cone is forced endwise into another of the same kind, the outer
expands and the inner contracts until coil friction is set up. As soon as this occurs,
reaction takes place, the outer cone contracting and the inner cone expanding. In
this manner the two cones become locked together until separated by withdrawing
either the outer or the inner by means of suitable gear.
Under a second arrangement one of the cones only is composed of a coil, the
other being made in one piece.
may be partly cylindrical.
The "cones "
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Olutches, Brakes, and the like.
We, EDWARD SHAW, of Ashton Gate, in the City and County of Bristol,
Engineer, and GEORGE JOHN HARCOURT, of 5 Albert Villas, Clifton, Bristol,
aforesaid, Gentleman, 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 relates to clutches, brakes and the like, and has relation to former
inventions for which Letters Patent were granted to us, namely, No. 15871 of 1887 ;
No. 20613 of 1889; and No. 20734 of 1890.
Our present invention has special reference to clutches known as cone clutches
and to brakes and like appliances constructed on similar principles.
According to one arrangement comprised in this invention the cones employed
therein are each divided so as to form coils. Cones so made possess greater flexi-
bility and are capable of expansion and contraction in diameter. When one such
cone is forced endwise into another of the same kind, the outer expands and the
inner contracts until coil friction is set up. As soon as this occurs, reaction takes
place, the outer cone contracting and the inner cone expanding. In this manner
the two cones become locked together until separated by withdrawing either the
outer or the inner by means of suitable gear.

page_text: Under a second arrangement, one cone, the outer, only is in the form of a coil;
the other being not thus divided. The cones are locked together or separated, at
will, by suitable gear.
According to a third arrangement the inner cone only is in the form of a coil, the
outer being an undivided cup or shell.
At Fig. 1 of the accompanying drawings is illustrated the arrangement according
to which both cones A and B are divided so as to form coils. The inner cone B
with its boss D, made in one piece therewith, is loose upon the shaft S. On the
boss D is keyed the rope-wheel F; but instead thereof may be a pulley, drum or
the like. The cone A, which, by means of the feather C, rotates with the shaft S 1
is extended to form a neck A¹. Projecting into a groove f in the neck A' is a hand
lever b pirotted as at c. The cones A and B are divided spirally in reverse direc-
tions. The arrow shown in the drawing indicates the direction of rotation of the
shaft S. The cone B is prevented from moving in one direction along the shaft S
by the collar E clamped on the shaft, and in the opposite direction by the collar a
kept in place by the feather C.
When, through the medium of the hand lever b, the cone A is moved into engage-
ment with the cone B, the free end of the spiral on the cone A is retarded and
that of the cone B carried forward, and hence the cone A contracts and the cone B
expands.
Thus the cones become inter-locked and the wheel F is caused to rotate with
the shaft S. The cones A and B are disengaged by withdrawing the former.
At Fig. 2 is shown, principally in elevation, a modification under which the inner
cone B, loose upon the shaft S, is not spirally divided, and the cone A consists of a
coil made separate from the neck A¹. Fig. 3 is a section on the line O P, Fig. 1,
and Fig. 4 is a section on the line QR, Fig. 1. Extending forward from the
neck A, which, by means of the feather Ċ rotates with the shaft S, are a pair of
arms g, g with which the two ends of the cone A engage. The arms 9,9 are turned
down at their free ends so as to depend over the inner end of the cone A, as shown.
As in the arrangement above described, the cone B is kept in place on the shaft S
by the collars a and E, and when the cone A is moved forward so as to interlock
with the cone B the spiral binds upon the latter, and the pulley E keyed on the
boss D which is formed in one piece with the cone B is carried round with the
shaft S.
At Fig. 5 is shown a modification under which the inner cone B only is spirally
divided. The fig. illustrates the application of the device as a shaft coupling.
The cone B is secured upon the shaft N by a key passed into the boss D. The
operating gear is similar to that herein before described with reference to Fig. 1,
and when, through the medium thereof, the cone A, which, by means of the
feather C, rotates with the shaft M, is made to interlock with the cone B, the
spiral binds on the inside of the cone A and the shaft N is made to rotate with
the shaft M. In order to steady the shafts M and N a socket B¹ is formed on
the cone B and extended forward, as shown. The ends of the shafts are received-
in this socket.
Either arrangement above described and illustrated in the drawings is applicable
for the purpose of a brake, and for this, one part is to be rigidly secured and pre-
vented from rotating, the other part being free to rotate so that when the frictional
grip is applied both parts rotate together.
Reverting to Figs. 2, 3 and 4, the starting gear shown thereat is arranged so
as to dispense with a fulcrum such as c, Figs. 1 and 5, for the hand-lever.
Fitting the shaft S loosely, and prevented from rotating therewith by an outside
attachment such as an eye e in the end of a stay e¹, is a sleeve G prevented, by the
collars K and a', from travelling along the shaft. On one side of the sleeve G is
formed a bracket in a slot in which works a sliding bar H. The cranked end of
the spindle J engages with a notch in the bar H which latter is turned up at one
end to project into the groove f of the neck A' of the cone A. The spindle J is

page_text: kept in place by the collar J₁ clamped to it.. By operating the hand-lever 6 the
bar H is moved along parallel with the shaft and causes the cones A and B to
interlock or disengage according to the direction in which the bar is moved.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is—
1. In cone clutches and the like, a pair of cones either or both being spirally
divided, arranged upon a shaft or shafts so as to interlock or bind together when
put into contact axially by suitable operating gear and thus to transmit power,
substantially as hereinbefore set forth with reference to the accompanying
drawings.
2. The mechanism for putting the cones into and out of engagement, herein-
before described and illustrated at Figs. 2, 3 and 4, of the drawings, consisting of
the sleeve G with slotted bracket, slide-bar H, working in the slot of the said
bracket, cranked spindle J, operating lever b, and the support e, e', all constructed,
arranged and operating as set forth.
Dated this 2nd day of November 1892.
NICHOLAS WATTS,
Agent.