IMPROVE- MENTS IN OR APPERTAINING TO HOISTS FOR MILLS WAREHOUSES AND OTHER STRUCTURES OR PLACES "
Year: 1882

page_text: LETTERS PATENT to Samuel Jones of the firm of W Jones & Son Engineers
of Warrington in the county of Lancaster for an Invention of IMPROVE-
MENTS IN OR APPERTAINING TO HOISTS FOR MILLS WAREHOUSES AND OTHER
STRUCTURES OR PLACES
"
PROVISIONAL SPECIFICATION left by the said Samuel Jones at the Office
of the Commissioners of Patents on the 6th October 1882.
SAMUEL JONES of the firm of. W. Jones & Son Engineers, of Warrington in the
County of Lancaster. "IMPROVEMENTS IN OR APPERTAINING TO HOISTS FOR
MILLS WAREHOUSES AND OTHER STRUCTURES OR PLACES.'
"
In hoists for warehouses and the like in use at the present time it is customary
to have to employ several ropes and gearing for the raising lowering and braking
the load. Now for a single hoist I can make one rope answer these three purposes,
for a double hoist two ropes. Amongst other advantages gained by my invention
is that the actual throwing of the winding mechanism into gear also tightens the
driving belt and thus enables it to have a firmer grip.
The main features of my apparatus are as follows
1st The levers of the brake and hoisting gear are connected by pins and slots or
equivalent mechanism so that the action of pulling the gear in motion either for
hoisting or lowering also throws the brake out of gear.
2nd The gear being put in action by eccentric or cam motion whereby the
driving wheel is thrown forward against the main driven wheel this very throwing
forward tightens the belts and ensures a firmer grip.
3rd The moment the actuating handle or rope is released the gear automatically
throws itself out of gear and brings the brake into action.
4th The fulcrum of the brake being adjustable by means of a screw and nut the
brake can be altered and wear taken up.
5th The details of the arrangement of hoist.

page_text: The modo I at present prefer of carrying my invention into practice is as
follows-
On the main barrel shaft of the hoist is a large fly or driven wheel which also
acts as the brake wheel against the rim of which either of the two driving wheels
rotates when hoisting or lowering. On each of the spindles of the two driving
wheels is fixed a belt pulley with a belt (one of them being a crossed belt) from a
common driving shaft. By these belts they are kept in constant but opposite.
rotation. The driving wheel on either of these shafts can (by the raising of a cam
lever so that the cam is pressed against the bearings of the said shaft) be brought
into contact with the fly or driven wheel. The raising of the cam lever causes a
pin on the same to engage into the end of a slot in the link or lever that is linked
to the brake and the raising of the cam lever thus takes off the brake before the
wheels come into contact and whichever driving wheel either the raising or the
lowering driving wheel is brought into action the brake is taken off. As in course
of time the brake is liable to wear I link it for a fulcrum to the nut of a screw at
right angles to it and in the same plane as its point of contact with the fly or
driven wheel consequently by simply altering the said screw the brake can be
always kept in the same place and any wear taken up. The belts always have a
tendency to pull the driving pulleys out of gear and when out of gear the brake
falls on the fly by means of its own gravity aided by the weight of its link or lever
connecting it to the two cam levers.
The two cam lovers for throwing into gear the driving wheels are each actuated
by a single rope.
The framing is preferably a simple triangle with brackets for the various
supports and a pillar to carry the fulcrum of the brake..
If very heavy weights are required to be raised in place of using the usual
complicated differential gear I prefer to have a secondary barrel shaft carrying a
barrel and large spur wheel which gears into a sliding pinion on the main barrel
shaft which can be slipped in or out of gear when required. This is all the gear
wo use,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed' by
the said Samuel Jones in the Great Seal Patent Office on the 6th April.
1883.
SAMUEL JONES of the firm of W. Jones and Son, Engineers, of Warrington,,
in the County of Lancaster, "IMPROVEMENTS IN OR APPERTAINING TO HOISTS
FOR MILLS, WAREHOUSES, AND OTHER STRUCTURES OR PLACES
"
In hoists for warehouses and the like in use at the present time, it is customary
to have to employ several hand-lines and gearing, for the raising, lowering, and
braking, the load. Now for a single hoist, I can make one-hand-line answer these
three purposes, for a double hoist, two ropes, one for hoisting lowering and braking or
stopping, the other for reversing braking or stopping.. Amongst other advantages
gained by my invention, is that the actual throwing of the winding mechanism
into gear, also tightens the driving belt, and thus enables it to have a firmer grip.
Another that it is impossible to get hold of the wrong rope to lower with, as one
can lower with either hand-line.
:
The invention is best described by aid of the accompanying. drawings of
apparatus constructed by me, in which-Fig. 1 is an elevation, and Fig. 2 a plan, of
hoisting apparatus. In these A is the ordinary quick speed drum, B a slow speed
drum, used only when very heavy weights are to be hoisted, and put into gear by
sliding pinion gearing into pinion C₁; D D¹ two driving shafts carrying pulleys
dd, upon which run open and crossed belts respectively, from the same counter-
shaft. On each of these shafts is a friction wheel E and F respectively. These
can be made to bear against friction wheel G on shaft of drum A, by means of
levers e and f, in the following manner. Take lever e, this is keyed to, the
spindle H, upon which is a cam or eccentric h. Turning the lever e causes the
cam to turn, and so brings friction wheel E against G, or away from it as the case
may be. If E be brought into gear, the hoist is caused to raise; if F be brought
into gear, the hoist lowers. I is a lever connecting brake J with. treadle bar, a
weighted lever K, or the hand lines, and having slots L L', in which work pins l',
fixed to levers e and f; by means of these pins when the brake is applied by
means of the treadle or weighted lever K, the pins are forced down, and the
pulleys E and F both thrown out of gear. Similarly, if either E or F be actuated
by its lever, the said lever by means of its pin, lifts the brake out of gear the
instant before the power is applied to wheel G. By this means, the driving wheel.
is thrown forwards against the main driven wheel, and this very throwing forward
tightens the belts and insures a firmer grip; it will also be seen that by this
arrangement the use of long levers, hitherto thought necessary for throwing the
friction wheels into action, is avoided. The moment the actuating lever or rope is
released, the driving apparatus automatically throws itself out of gear, and brings
the brake into action, consequently the attendant has only to let go of the hand
line for the hoist to stop, and thus instead of as with some other hoists, having to
hold the hand lines with one hand, while he manipulates the goods, both hands are
free for said manipulation. As the brake is apt to wear, and the wear would in
time interfere with this arrangement, I adopt the following plan for taking up
the wear, namely, I pivot it on a bar M, screwed at each end and held in bracket N
by outs m n; by altering these nuts the slack is taken up.
Having now described my invention, and the best mode known to me for carrying
it into effect, I wish it to be understood that what I believe to be new, and desire
to protect under Letters Patent, is:-
The manufacture and use of hoists for mills, warehouses, and other structures
t

page_text: and places, arranged and constructed substantially as herein described, in which the
specially valuable and novel parts are: 1, the cam or eccentric motion which
causes the friction wheels to come in contact with each other by the use of short
levers; 2, the arrangement by which the brake and starting lovers are connected
together, so that the brake cannot be applied without the driving apparatus being
thrown out of gear, or the driving mechanism applied till the brake is thrown off;
3rd, the arrangement of driving mechanism, by which the belt is tightened by the
act of throwing into gear, and the hoist is automatically thrown out of gear by the
pull of the belt, the moment pressure is withdrawn from the lever; 4th, the arrange-
ment for taking up the slack or wear on the brake, consisting of the screwed bar K,
and the eccentric or cain motion, with moving the short levers, which causes the
friction wheels to come into contact with each other, thereby giving motion to the
hoist barrel, and if for heavy weights, the large wheel is brought into gear with
pinion.
In witness whereof I the said Samuel Jones have hereunto.set my hand and
seal this fourth day of April in the year of our Lord one thousand eight
hundred and eighty three.