Improvements in and relating to Friction Clutches or Couplings for Hoisting Engines, Windlasses, or similar Machines.
Year: 1885

page_text: Improvements in and relating to Friction Clutches or Couplings
for Hoisting Engines, Windlasses, or similar Machines.
25
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co, Patent
Agents, Southampton Buildings, in the County of Middlesex do hereby declare
the nature of my invention for IMPROVEMENTS IN AND RELATING TO FRICTION
OR COUPLINGS FOR HIQISTING ENGINES, WINDLASSES OR SIMILAR
MACHINES to be as follows:-
CLUTCHES
This invention relates to friction cones or couplings for hoisting engines,
windlasses, and similar machines, and comprises various improvements hereinafter
set forth.
In carrying my said invention into practice, I make the drum, on which the chain
or rope is wound, with a slightly conical recess at one end, and mount the said
drun loosely on its shaft. The toothed wheel, which is fixed on this shaft for the
purpose of imparting motion thereto, is provided on the side next the said drum,
with a ring or disc composed of a series of segments of wood, which are bolted or
otherwise secured to the said wheel; this ring or disc is made slightly conical to
fit the recess in the drum. The said segments are preferably so arranged that,
when they are fixed in place, the grain of the wood will lie perpendicular, or nearly
so, to the contact surfaces.
I prefer to arrange the wood segments in such a manner that they can be readily
adjusted when they shrink or become worn. For this purpose I make the said
segments slightly taper in transverse section, and place them alternately with the
wide and the narrow surfaces in contact with the toothed wheel. The segments
which have their narrow surfaces in contact therewith are provided with packing
pieces placed between them and the wheel. When the periphery of the wooden
ring or disc becomes worn these segments are removed and thinner packing pieces
are placed beneath thein; the said segments are then replaced and, when tightly
screwed up, force the remaining segments outward, the bolt-holes in the latter
being elongated to permit this outward movement.
I provide a projecting ring or flange on the said toothed wheel about midway
between its centre and its periphery. The wood segments abut against this ring
or flange instead of against the boss or hub of the wheel as heretofore.

page_text: The end of the drum-shaft opposite to that carrying the toothed wheel is bored
longitudinally to receive a pin or rod, preferably of steel. This pin or rod bears
against a cotter which is passed through a transverse slot in the said shaft. The
said cotter is held or retained in position by pins or studs inserted in it on each
side of the shaft. A ring or collar is placed between this cotter and the end of
the drum, and the aforesaid slot is extended lengthwise of the shaft sufficiently to
permit the movement of the cotter therein by a screw acting upon the end of the
said pin or rod, to put the drum in gear or in frictional contact with the wooden
ring or disc on the toothed wheel. The drum is normally held out of gear there-
with by a strong spring placed between the said toothed wheel and the end of the
drum. This spring presses against the drum and forces the cotter against one end
of the said slot, but, by turning the said screw in the proper direction, the said
cotter is forced towards the other end of the slot, the spring is compressed, and the
drum is moved into gear or frictional contact with the ring or disc on the toothed
wheel.
A screw-collar is provided on the shaft to bear the thrust thereon; this collar
can be adjusted to compensate for wear.
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: Improvements in and relating to Friction Clutches or Couplings
for Hoisting-engines, Windlasses, or similar Machines.
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, London, do hereby declare the nature of my invention
for "IMPROVEMENTS IN AND RELATING TO FRICTION CLUTCHES OR COUPLINGS FOR
HOISTING-ENGINES, WINDLASSES, OR SIMILAR MACHINES" 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 friction clutches or couplings for hoisting-engines,
windlasses, and similar machines, and comprises various improvements hereinafter
set forth.
In the accompanying drawings,
Figure 1 is a plan, partly in horizontal section, and
Figure 2 a side elevation, partly in vertical longitudinal central section, shewing
parts of a hoisting-engine made according to the said invention..
Figure 3 is a face view of a toothed driving wheel provided with a friction cone
as hereinafter described.
Figure 4 is a face view of a toothed wheel and friction cone hereinafter described
wherein provision is made for adjusting the wood blocks when they become worn.
Figure 5 is a section on the line x, x, Figure 4.
Figure 6 is an edge view of the wood blocks, extended to shew clearly the
means for adjusting the said blocks.
Like letters indicate corresponding parts throughout the drawings.
a indicates the frame of the machine. b is a drum, whereon the lifting chain or
rope is to be wound, and to which one end of the said chain or rope is to be
attached. This drum is made with a hollow cone or conical surface b¹ at one end,
and is mounted on its shaft c in such a manner as to be capable of rotation and
also of endwise movement thereon. This shaft is carried in bearings d in the
frame a.
e is a toothed driving wheel, which is fixed on the shaft c and to which
rotary motion is to be imparted by any suitable means. This wheel is provided,
on the side next the said drum, with a friction cone or conical disc f composed of a
series of sections, segments, or blocks f₁ of wood, which are secured by bolts g or
otherwise to the said wheel; this friction cone or disc is made to fit the hollow
cone or conical surface 6¹ on the drum b. The said wood segments or blocks are
preferably so arranged that, when they are fixed in place, the grain of the wood
will be perpendicular, or nearly perpendicular, to the contact surfaces.
The shaft c is bored longitudinally at one end as at c¹ to receive a pin or rod h
which is preferably of steel. This pin or rod bears against a cotter i which is
passed through a transverse slot c³ in the shaft c. The said cotter is held or
retained in position by pins or studs i¹ inserted therein on each side of the shaft c.
A ring or collar j is placed upon the shaft c between the cotter i and the end of the
drum b. The slot c³ extends lengthwise of the shaft c sufficiently to permit the
movement of the cotter i therein for the purpose hereinafter specified. k is a screw
which fits into a nut 7 firmly secured to the frame a, and which is arranged to act
upon the drum b, through the medium of the pin or rod h, cotter i, and collar j, to
put the said drum in gear, or in frictional contact, with the wooden cone or disc
on the toothed wheel e. The drum bis normally held out of gear with the said

page_text: cone or disc by a strong spring m placed upon the shaft c between the wheel e and
the end of the drum b. This spring presses against the drum and tends to force
the cotter i against the end c³ of the slot c³; but, by turning the screw in the
direction indicated by the arrow in Figure 1, the said cotter will be forced towards
the other end of the said slot; the spring m can thus be compressed and the
drum b moved into gear, or frictional contact, with the cone or disc f. This cone
or disc and the hollow cone b' form a very, durable and efficient friction clutch or
coupling.
A screw-collar n is fitted on the shaft c to take up the thrust thereon due to the
action of the spring m; this collar can be adjusted to compensate for wear.
I prefer to arrange the wood segments f¹ in such a manner that they can be
readily adjusted when they shrink or become worn. For this purpose I make the
said segments slightly taper in. transverse section, and place them with their wide
and narrow surfaces alternately next the toothed wheel e, as shown in Figure 6.
Between the wheel e and those segments which have their narrow surfaces next.
the said wheel I place packing pieces of any desired thickness. When the
friction cone or disc f becomes worn, or reduced in size by shrinkage, these
segments are removed and the said packing pieces are replaced by thinner packing
pieces; the said segments are then again inserted in their places and secured by
the bolts g. By tightly screwing up the nuts g on these bolts, the segments f¹
will be forced outward, the bolt-holes e¹ in the toothed wheel e being elongated as
shown to permit this outward movement.
I sometimes provide a projecting ring or flange e² on the toothed wheel c about
midway between its centre and its periphery and arrange the wood segments f' to
abut against this ring or flange instead of against the boss or hub of the wheel as
heretofore; I am thus enabled to employ segments of smaller size than would
otherwise be necessary.
Having now particularly described and ascertained the nature of my said
invention 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
First. The combination of the drum capable of rotation and of endwise movement
upon its shaft and provided with the hollow friction cone or conical surface, and
the driving wheel fixed on the said shaft and provided with the friction cone or
conical disc formed of wood segments or blocks, substantially as, and for the
purpose, set forth.
Second. The provision of a projecting ring or flange upon the said driving wheel
midway between its centre and circumference, or approximately so, as, and for the
purpose, set forth.
Third. The modification of the said invention wherein I provide for the
adjustment of the wood segments or blocks, substantially as, and for the purpose,
set forth.
Fourth. The combination, with the druin and driving wheel mounted on the
shaft and provided with the friction cones as above described, of the spring m, the
cotter i, the pin or rod h, the screw k, and the stationary nut, all substantially as,
and for the purposes, set forth.
Fifth. The improved apparatus consisting of the parts constructed and combined
substantially as described with reference to Figures 1, 2, and 3 of the drawings and
operating as, and for the purposes, specified.
Dated this 12th day of October 1885
HASELTINE, LAKE & Co.,
For the Applicant.