IMPROVEMENTS IN CRABS, WINCHES, OR OTHER MACHINERY FOR LIFTING or Hauling
Year: 1875

page_text: LETTERS PATENT to Francis William Crossley and William John
Crossley, both of Great Marlborough Street, Manchester, in the
County of Lancaster, for the Invention of "IMPROVEMENTS IN CRABS,
WINCHES, OR OTHER MACHINERY FOR LIFTING or Hauling.”
PROVISIONAL SPECIFICATION left by the said Francis William
Crossley and William John Crossley at the Office of the
Commissioners of Patents, with their Petition, on the 3rd July
1875.
We, FRANCIS WILLIAM CROSSLEY and WILLIAM JOHN CROSSLEY,
both of Great Marlborough Street, Manchester, in the County of
Lancaster, do hereby declare the nature of the said Invention for "Im.
PROVEMENTS IN CRABS, WINCHES, OR OTHER MACHINERY POR LIFTING OR
HAULING," to be as follows:-
--
:
Our Invention consists in applying to crabs, winches, or other
machinery for lifting or hauling, means of stopping the motion by a
break at the same time as the driving band is shifted from the fast to

page_text: the loose pulley, and by the same action, and also means of driving the
barrel at a high speed backwards for the purpose of running out chain
or rope.
On the framing of the machine we mount a sliding bar on which is a
fork embracing the driving band, and on this bar we form an inclined
part facing the break wheel, and we mount on the break strap or break
block an antifriction roller which bears on the inclined part of the
bar. When the bar is slid by means of a lever or rack and pinion, or
otherwise, so as to draw by its fork the driving band off the fast pulley
on to the loose pulley, its inclined part at the same time acting on the
break tightens it against the break wheel, and thus the machinery is
stopped at the same time that the band is struck and by the same
action.
We mount the loose pulley on a sleevo projecting from the framing,
through which sleeve the driving shaft passes carrying the fast pulley
on its projecting end. The driving shaft is thus supported, while at the
same time the loose pulley comes next to the framing and is adjacent to
the break wheel. On the side of the loose pulley we form a rim having
the same diameter as the break wheel, and we mount a disc on an axis
at right angles to the driving shaft, the said axis being fixed in a slide
or in the middle of a lever, so that by moving the slide or lever the disc
upon it can be made to bear against the rim on the loose pulley and the
periphery of the break wheel. In ordinary working the disc is moved
out of contact with these, but when it is desired to run the machinery
backwards for the purpose of paying out chain or rope, the disc is
pressed against the break wheel and the rim of the loose pulley, which
latter is then being driven by the driving band.
By means of the frictional contact with the disc the loose pulley
drives it, and it drives the break wheel in the reverse direction.
By arranging the disc so that the rim of the loose pulley bears on it
near its centre, whilst the break wheel bears on it at a greater distance
from its centre, the speed of the break wheel is increased, so that while
the driving band continues to travel at the same rate as when it drives
the machinery for hauling, the motion backward for paying out is
accelerated.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Francis William Crossley and William John
Crossley in the Great Seal Patent Office on the 30th December
1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, FRANCIS
WILLIAM CROSSLEY and WILLIAM JOHN CROSSLEY, both of Great
Marlborough Street, Manchester, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of July, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Francis William Crossley and
William John Crossley, Her special license that we, the said Francis
William Crossley) and William John Crossley, our executors, admini-
strators, and assigns, or such others as we, the said Francis William
Crossley and William John Crossley, our executors, administrators, and
assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed,
should and lawfully might make, usc, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN CRABS, WINCHES,
OR OTHER MACHINERY FOR LIFTING OR HAULING," upon the condition
(amongst others) that we, the said Francis William Crossley and
William John Crossley, our executors, or administrators, by an instru-
ment in writing under our or their hands and seals, or under the hand
and seal of one of us or them, should particularly describe and
ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Francis William Crossley, on
behalf of myself and the said William John Crossley, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, reference being had to the

page_text: accompanying Sheet of Drawings, and to the figures and letters marked
thercon, that is to say :-
Our Invention consists in applying to crabs, winches, or other
machinery for lifting or hauling, means of stopping the motion by a
break at the same time as the driving band is shifted from the fast
to the loose pulley, and by the same action, and also means of driving
the barrel at a high speed backwards for the purpose of running out
chain or rope.
On the framing of the machine we mount 'a sliding bar, on which is
a fork embracing the driving band, and on this bar we form an inclined
part facing the break wheel, and we mount on the break strap or break
block an antifriction roller which bears on the inclined part of the
bar. When the bar is slid by means of a lever or rack and pinion, or
otherwise, so as to draw by its fork the driving band off the fast pulley
on to the loose pulley, its inclined part at the same time acting on the
break tightens it against the break wheel, and thus the machinery is
stopped at the same time that the band is struck, and by the same
action.
We mount the loose pulley on a sleeve projecting from the framing,
through which sleeve the driving shaft passes, carrying the fast pulley
on its projecting end. The driving shaft is thus supported, while at the
same time the loose pulley comes next to the framing and is adjacent
to the break wheel. On the side of the loose pulley we form a rim
having the same diameter as the break wheel, and we mount a disc on
an axis at right angles to the driving shaft, the said axis being fixed in
a slide or in the middle of a lever, the disc upon it can be made to
bear against the rim on the loose pulley and the periphery of the break
wheel. In ordinary working the disc is moved out of contact with
these, but when it is desired to run the machinery backwards for the
purpose of paying out chain or rope the disc is pressed against the
break wheel and the rim of the loose pulley, which latter is then driven
by the driving band.
By means of the frictional contact with the disc the loose pulley
drives it, and it drives the break wheel in the reverse direction.
By arranging the disc so that the rim of the loose pulley bears on
it near its centre, whilst the break wheel bears on it at a greater

page_text: distance from its centre, the speed of the break wheel may be increased,
so that while the driving band continues to travel at the same rate as
when it drives the machinery for hauling, the motion backward for
paying out is accelerated.
paying out is accelerated.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 represents an end view, and Fig. 2 a longitudinal section of a
crab fitted with our improvements.
A is the driving pulley fixed on the first motion shaft a; and B is
the loose pulley fitted to revolve freely on a sleeve bush 6 projecting
from the end frames; C is a rim on the loose pulley of the same
diameter as the brake wheel D which is fixed on the shaft a; E is a
bar fitted to slide longitudinally in the upper part of the framing and
provided with two studs e, e, forming a fork for guiding the driving
strap on to the fast pulley A or the loose pulley B, according as the
bar E is slid towards the right or left; it is so slid by means of a lever F
having a toothed pinion gearing with rack teeth on the bar E. A
friction strap G is connected to the framing by links g, g, on which is
mounted a roller h that rests on the upper edge of the bar E, the friction
strap being then clear of the brake wheel D. An inclined part H is
formed on the bar E in such a position that when the bar is slid to the
left, so as to throw the driving band off the fast pulley A and on to the
loose pulley B, the incline H moving under the roller / raises it, and
thereby pulls the brake strap G against the periphery of the brake
wheel D so as to stop the crab. A horizontal disc K is mounted on a
lever k, by which it can at will be pressed against the periphery of the
brake wheel D and at the same time against the rim C on the loose
pulley. Thus, when the driving band has been moved on to the loose
pulley, causing it to revolve, the rim C drives by frictional contact the
disc K, and the latter by frictional contact drives the brake wheel D in
the opposite direction and with a speed increased in proportion as its
contact with the disc K is at a greater distance from the centre of the
disc than the contact of the rim C therewith.
It is obvious that the rim C, the edge of the brake wheel, and the
disc K, might be toothed so as to act as bevil gearing.
The studs e, e, forming the fork for striking the driving strap are
adjustable in a slot in the bar E, so that they can be set farther apart

page_text: than the width of the driving band. Thus, after having guided the
driving band on to the loose pulley and caused the brake to be applied
by the action of the incline H, the bar E could be moved back towards
the right, releasing the brake but still permitting the band to run on
the loose pulley, and then the disc K could be brought into action to
run the barrel backwards. Or the loose pulley B might be made wider
on the face, as indicated by the dotted lines B', so that the bar E could
be moved sufficiently far to bring the driving band on to the loose
pulley without applying the brake, in which case the disc K could be
brought into action; and by a further movement of the bar E, the
driving band being still on the widened periphery of the loose pulley,
the brake could be brought into action.
Having thus described the nature of our Invention and in what
manner the same is to be performed, we claim,-
First. The use for crabs, winches, or other machinery for lifting or
hauling of a sliding bar having on it a fork for striking the driving
strap, and also an inclino which, when the bar is slid so as to move the
strap on to the loose pulley, acts directly on a brake at the same time,
substantially as herein described.
Second. The use in crabs, winches, or other machinery for lifting or
hauling of a wheel which can at will be brought into contact with a
rim on the loose pulley and also with a wheel on the driving shaft, so as
to cause the latter to be driven by the loose pulley in the opposite
direction and at a greater speed, substantially in the manner and for the
purpose herein set forth.
In witness whereof, I, the said Francis William Crossley, have
hereunto set my hand and seal, this Twenty-fourth day of
December, in the year of our Lord One thousand eight
hundred and seventy-five.