IMPROVEMENTS IN AND APPLICABLE TO HOISTS OR APPARATUS FOR RAISING AND LOWERING WEIGHTS OR HEAVY BODIES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by William Adair and George Bond
Smith at the Office of the Commissioners of Patents on the 30th January
1882.
WILLIAM ADAIR and GEORGE BOND SMITH both of Liverpool in the County of
Lancaster Engineers. "IMPROVEMENTS IN AND APPLICABLE TO HOISTS OR
APPARATUS FOR RAISING AND LOWERING WEIGHTS OR HEAVY BODIES."
This Invention relates to hoists and like apparatus in which a continuously
moving shaft driven by any suitable power, is employed, and in which motion is
communicated as required from the continuously rotating shaft to the winding
barrel or barrels.
The objects are to provide first simple, durable, efficient, and safe starting,
driving and stopping appliances applicable to hoists as now made, and second,
hoists or raising and lowering apparatus of superior construction specially adapted
to be operated by the appliances described under the second and third part of my
Invention.
Under the first part of my Invention hoists or raising and lowering apparatus to
be operated by the appliances set forth under the second part are constructed as
follows: A worm wheel driven by a screw or worm is secured on a shaft carrying
a winding barrel: on the said shaft is a spur wheel which gears into a pinion on a
countershaft. also carrying a winding barrel. The countershaft pinion is by
preference capable of being moved into and out of gear with the spur wheel.
Tho said winding barrel shafts are carried in a frame which also carries the rotating
shaft and the screw or worm shaft. A brake and hand gear of any ordinary or
suitable construction is provided if desired.
Appliances under the second part of my Invention consist essentially of a
rotating shaft a double acting friction clutch or like suitable device and bevel and
worm gearing. The rotating shaft carries the friction or like clutch moving with
the said shaft and two free bevel wheels facing each other; a third bevel wheel
gears with both the bevel wheels above mentioned and is carried by a shaft fitted
with a screw or worm. The said screw or worm gears with a worm wheel secured
on any suitable shaft of the hoist or raising and lowering apparatus. Suitable
bearings are provided to carry the shafts and levers cords or like appliances are
provided for giving motion to the clutch so as to cause the rotating shaft to gear

page_text: with either of the bevel wheels carried thereon. Two clutches are used if desired
and more than one hoist may receive motion from the rotating shaft.
Under the third part, gear for giving motion to hoists or raising and lowering
apparatus consists of two parallel shafts supported in suitable bearings geared
together by toothed or friction wheels and fitted each with a freely revolving or
loose toothed wheel both gearing into a spur wheel on the winding barrel or other
suitable shaft of the hoist or raising and lowering apparatus. Each of the two
shafts above mentioned has a friction or equivalent clutch attached thereto capable
of being thrown into and out of gear with the freely revolving toothed wheels.
The clutches are operated by a lever to which motion is communicated through
screw, eccentric or other suitable gear.