IMPROVED APPARATUS FOR RAISING AND LOWERING, AND FOR OTHER PURPOSES
Year: 1879

page_text: LETTERS PATENT to William Clark, of 53, Chancery Lane, in the County of
Middlesex, Patent Agent, for the Invention of "IMPROVED APPARATUS FOR
RAISING AND LOWERING, AND FOR OTHER PURPOSES." A communication from
abroad by Stephen Dennis, Antonio Samper, and Julio Valenzuela, all of the
United States of Colombia, South America.
Sealed the 27th January 1880, and dated the 18th August 1879.
i
PROVISIONAL SPECIFICATION left by the said William Clark at the Office
of the Commissioners of Patents on the 18th August 1879.
WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex, Patent Agent.
"IMPROVED APPARATUS FOR RAISING AND LOWERING, AND FOR OTHER PURPOSES."
[A communication from abroad by Stephen Dennis, Antonio Samper, and Julio
Valenzuela, all of the United States of Colombia, South America.]
14
This Invention relates to a modification of the apparatus described in a former
application for Letters Patent, dated July 16th, 1879, No. 2906, and to the adap-
tation thereof for other purposes, such as for raising and lowering weights, and
transmitting power and motion other than rotary motion. In the said former
application the Invention is described as applied for the transmission of rotary
motion from one shaft to another, and the apparatus consists of an endless cord,
rope, or chain wound spirally several times round drums or pulleys upon the two
shafts, the several coils or convolutions of the rope, cord, or chain being maintained
constantly in the same plane or position on the drum or pulley by means of grooved
guide rollers at front and rear, each groove in the guide rollers embracing a turn of the
cord or rope, and so preventing it running off at the sides of the pulley or drum.
The present Invention has for its object the adaptation of this system to other
purposes, for which a pair of drums or pulleys are not required to be geared together by
an endless belt such as for loading and unloading vessels, and other similar operations,
and it consists in the employment of one or more ropes, cords, or chains, not endless,
as before, but with the ends free, each similarly wound on a narrow drum or pulley,
and maintained in the same plane or position thereon by grooved guide rollers,
acting as before on the several coils or convolutions upon the drum or pulley. Thus
arranged, one end of the cord, cable, or chain will be wound on the drum or pulley
as the other end is unwound therefrom, and power would be applied to the one end
and the weight to be raised, or other work to be done, to the other.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Clark in the Great Seal Patent Office on the 16th
February 1880.
WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex, Patent Agent.
"IMPROVED APPARATUS FOR RAISING AND LOWERING, AND FOR OTHER PURPOSES."
A communication from abroad by Stephen Dennis, Antonio Samper, and Julio
Valenzuela, all of the United States of Colombia, South America.
The Invention relates to improvements in the transmission of motion, and consists
in winding cords, chains, or cables, whether endless or otherwise, spirally upon
surfaces of revolution capable of being thrown into gear at will, and in maintaining
each convolution of the spirals constantly in the same plane or position during its
rotation so as to prevent the cord, chain, or cable running off.
.
1
In the annexed Drawings I have illustrated the Invention, by way of example,
only as applied to the transmission of motion from one shaft to another. It consists,
as above mentioned,' in winding cables, cords, or chains, which may be either
endless or with the ends free spirally upon one or more 'pulleys or drums in order
to' effect' an economy of time in loading and unloading vessels; and in other similar
operations, and to enable one end of the cord, cable, or chain' to unwind as the
other end is wound on.
:
Figure 1 is a plan of one arrangement of the mechanism; Figure 2 is a section
of the same on line x, x, Figure 1; Figure 3 is a section of loose pulley and clutch.
In this application of the Invention the apparatus consists of two pulleys
mounted on the driving and driven shaft respectively, and connected by an endless
cord, cable, or chain that makes one or more turns or coils around each, and is
drawn to the ordinary tension of a driving belt. In front and rear of each of these
pullies, and nearly in contact' with their faces, are mounted grooved guide pulleys
turning either loose on fixed spindles or keyed on freely revolving spindles. Each
groove in these pulleys embraces a turn or coil of the cord or rope, and prevents it
from running off at the side of the pulley. It will be clearly seen that by this
means power can be transmitted from one point to another without the friction.
incident to the use of bands, and without the loss of power due to the slipping of
the bands on the drums, which invariably occurs except when running at very low
speeds. Practice has shown that a saving of power of from 20 to 25 per cent.
which is convertible into a like saving of fuel can be obtained by the substitution
of this frictionless and non slipping means of transmission for the common belt. It
will also be seen that by means of the grooved rollers motion can be transmitted
with ease from a horizontal to a vertical shaft without the employment of any
toothed gearing, and that power can be transmitted to any distance with much less
loss than by any other means heretofore used.
↓
'
In the Drawings A is the frame supporting the working parts of the apparatus,
B is the driving pulley, and C the driven pulley. The pulley B is keyed upon
shaft a, and the pulley C is loose upon shaft b¹, but may be thrown in gear there-
with by means of clutch D keyed on shaft 61. E, E, are the grooved rollers mounted
on spindles c¹, c¹. The cord, rope, or chain F.is coiled several times around pulleys
B and C, and the grooves of rollers E, E, in which, the coils of said cord or rope run
prevent it from slipping off at the side. The grooved rollers are loose on their axes,
so that there is no appreciable amount of friction between them and the cord. G is
a cross bar for strengthening the frame.
The simplicity, effectiveness, and durability of this apparatus will be evident to
all who have had experience with the common belt and cog wheel systems.
Having described the nature of the Invention and the manner of performing the
same, I would observe that I do not limit myself to. the particular arrangement
above specified, as modifications may be made to suit requirements, but that what

page_text: I claim as the Invention to be protected by the hereinbefore in part recited Letters
Patent is,
1st. The mode of winding cords, chains, or cables, whether endless or not, spirally
upon one or more drums or pulleys, and maintaining the convolutions constantly in
the same vertical plane by means of grooved guide rollers mounted either loose on
fixed spindles or keyed on revolving spindles, as and for the purposes hereinbefore.
specified.
2nd. The use and application of this system of transmission for loading and
unloading vessels, and other similar operations, as well as for the transmission of
motion from one drum or pulley to another, all as hereinbefore described, for the
purpose specified.
In witness whereof, I, the said William Clark, have hereunto set my hand and
seal, this Sixteenth day of February, in the year of our Lord One thousand
eight hundred and eighty.
W. CLARK.
(LS)