Improvements in or connected with Hoisting Apparatus.
Year: 1891

page_text: Date of Application, 12th Dec., 1891
Complete Specification Left, 31st Mar., 1892-Accepted, 7th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Hoisting Apparatus.
A communication by JOHN LEACH, of Jersey City, in the County of Hudson, and
State of New Jersey, United States of America."
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.1.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool and 6, Bank Street,
Manchester both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to an improvement in or connected with hoisting apparatus,
and has for its object to so improve the construction of such machines that the
drums will be kept cool under all circumstances, and the rope adapted to be wound
upon or from the drums thereby prevented from becoming scorched or injured from
the action of heat which, in the present construction of hoisting apparatus, is
rapidly and intensely generated.
The invention consists in the novel construction and combination of the several
parts, as will be hereinafter fully set forth in connection with a hoisting apparatus
of a make having a central winding drum and two side, or whip, drums, but it is
described in connection with such a make simply for purposes of description and as
it will be at once seen by such a description how the invention can just as easily be
applied to other makes of apparatus.
The central winding drum of the apparatus is made hollow or provided with an
interior chamber; and, to the ends of the said central drum, shafts are secured, one
of the shafts being provided with a spur gear or other form of gear adapted to be
driven from a suitable motor.
Each shaft has secured thereon, near its outer end, a whip drum, the whip drums
being provided with an interior chamber, formed around a hub, which hub extends
from end to end and engages with the shaft. Each shaft is journalled in a bearing,
and the wearing surfaces of the bearings, or the surfaces engaging with the shaft,
are mainly composed of an anti-friction material, preferably hard wood. The wood
is introduced in the bearings in the shape of sleeves, and the sleeves are arranged
at each side of the centre of the bearings, and, between the opposed edges of the
sleeves, an annular groove or channel is produced in the inner surface of said
bearings.
Each bearing is further provided with a channel in its under side, the said channel
being produced in the outer face of the bearing, and carried upward until it joins
the annular channel or groove between the opposed edges of the sleeves.
Each shaft is provided with two preferably parallel channels. The one channel
extends from a point near the outer end of the shaft through to the inner end
thereof, and is in communication with the interior of the central drum by means of
an opening produced in the end of the drum and registering with said channel.
The second channel of the shaft connects with number one channel at its end, and
the second channel is of less length than this parallel channel, as the inner end of
it is adapted to connect with the annular channel in the box or bearing.
In operation, cold water or other cooling medium is forced in any suitable or
approved manner into the mouth of the channel of one box or bearing, from which
the water passes to the annular channel of the box and finds its way from said
channel into the shorter shaft channel, from whence it flows into the longer
channel, and thence through a thimble connecting the longer channel with the
interior of the whip drum, down through a second thimble from the whip drum into

page_text: the channel again, and through the channel into the central drum. Two thimbles are
employed in the whip drum to graduate the circulation of water in the whip drum ;
and between the thimbles the channel is divided by a partition. The thimbles are
inserted into the hub and shaft through openings produced in the whip drum, which
openings are normally closed by suitable plugs.
After the water leaves the central drum, it passes out through the shaft at the
opposite end of the central drum through the opposite whip drum, and out through
the channel in the bearing for this latter shaft.
It will thus be observed that a free circulation of water may at all times be
maintained within the drums, which will continually maintain the outer surface of
the drums at such a low temperature as not to scorch or injure in the slightest
degree the ropes carried by the drums. When the drums are not cooled as above
set forth, the friction caused by the rope rapidly winding upon or unwinding from
the drum generates such an intense heat as to quickly render the best manilla rope
useless; and, when the drums are being constantly used, as, for instance, upon
ship-board in handling freight, the loss of manilla rope under the old construction
of drums is exceedingly great.
Dated this 11th day of December 1891
WM. P. THOMPSON & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Hoisting Apparatus.
A communication by JOHN LEACH, of Jersey City, in the County of Hudson, and
State of New Jersey, United States of America."
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention 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 an improvement in or connected with hoisting apparatus,
and has for its object to so improve the construction of such machines that the
drums will be kept cool under all circumstances, and the rope adapted to be wound
upon or from the drums thereby prevented from becoming scorched or injured
from the action of heat which, in the present construction of hoisting apparatus is
rapidly and intensely generated.
The invention consists in the novel construction and combination of the several
parts, as will be hereinafter fully set forth and pointed out in the claims, in
connection with a hoisting apparatus of a make having a central winding drum
and two side, or whip, drums, but it is described in connection with such a make
simply for purposes of description and as it will be at once seen by such a
description how the invention can just as easily be applied to other makes of
apparatus.
Reference is to be had to the accompanying sheet of illustrative drawings
forming a part of this Specification, in which similar figures and letters of reference
indicate corresponding parts in all the views.
Figure 1 is a partial side elevation and a partial sectional view of the drum
section of the apparatus.
Figure 2 is a transverse section taken upon the line 2-2 of Figure 1, and
Figure 3 is a similar section taken on the line 3-3 of Figure 1.
The central winding drum 10 is made hollow or provided with an interior
chamber 11, and, to the ends of the said central drum, shafts 12 and 13 are

page_text: secured, one of the shafts being provided with a spur gear 14, or other form of
gear adapted to be driven from a suitable motor.
Each shaft has secured thereon, near its outer end, a whip drum 15, the whip
drums being provided with an interior chamber 16, formed around a hub 17, which
hub extends from end to end and engages with the shaft. Each shaft is journalled
in a bearing A, and the wearing surfaces of the bearings, or the surfaces engaging
with the shaft, are mainly composed of an anti-friction material, preferably hard
wood. The wood is introduced in the bearings in the shape of sleeves as illustrated
at a, and the sleeves are arranged at each side of the centre of the bearings, and
between the opposed edges of the sleeves an annular groove or channel 18 is
produced in the inuer surface of said bearings, as is best shown at the left in
Figure 1 and in Figure 2.
Each bearing A is further provided with a channel 19 in its under side, the
said channel being produced in the outer face of the bearing, and carried upward
until it joins the annular channel or groove 18.
Each shaft is provided with two preferably parallel channels 20 and 21. The
channel 20 extends from a point near the outer end of the shaft through to the
inner end thereof, and is in communication with the interior of the central drum 10
by means of an opening 22, produced in the end of the drum and registering with
said channel 20, as is likewise illustrated in Figure 1. The channel 21 of the shaft
connects with the channel 20 at its end, and the channel 21 is of less length than
this parallel channel, as the inner end of the channel 21 is adapted to connect with
the annular channel 18 in the box or bearing.
In operation, cold water is forced in any suitable or approved manner into the
mouth of the channel 19 of one box or bearing A, from which the water passes to
the annular channel 18 of the box and finds its way from said channel into the
shorter shaft channel 21, from whence it flows into the longer channel 20, and
thence through the thimble 23, connecting the channel 20 with the interior of the
whip drum, down through a second thimble 24 from the whip drum into the
channel 20 again, and through the channel 20 into the central drum. The two
thimbles 23 and 24 are employed to graduate the circulation of water in the whip
drum; and between the thimbles the channel 20 is divided by a partition 25. The
thimbles are inserted into the hub and shaft through openings produced in the
whip drum, which openings are normally closed by suitable plugs.
After the water leaves the central drum, it passes out through the shaft at the
opposite end of the central drum through the opposite whip drum, and out through
the channel 19 in the bearing for this latter shaft.
It will thus be observed that a free circulation of water may at all times be main-
tained within the drums, which will continually maintain the outer surface of the drums
at such a low temperature as not to scorch or injure in the slightest degree the
ropes carried by tlie drums. When the drums are not cooled as above set forth
the friction caused by the rope rapidly winding upon or unwinding from the drum
generates such an intense heat as to quickly render the best manilla
горе
and when the drums are being constantly used, as for instance upon ship-board in
useless;
handling freight, the loss of manilla rope under the old construction of drums is
exceedingly great.
Having now particularly described and ascertained the nature of the said inven-
tion, 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 :-
1. The improvements in or connected with hoisting apparatus which consist in
the combination, with a shaft provided with connected channels and a bearing for
the shaft provided with an inlet channel and an annular intersecting channel in its
inner face, the said annular channel connecting with a channel in the shaft, of a
drum mounted upon the shaft, provided with an interior chamber and channels
connecting the chamber with one of the channels in the shaft, as and for the
purpose set forth.

page_text: 2. The improvements in or connected with hoisting apparatus which consist in
the combination with a central drum provided with an interior chamber, a shaft
connected with the drum provided with two longitudinal channels therein, one of
which is connected with the interior of the central drum, the channels in the shaft
being connected, and a journal box for the shaft, provided with an inlet channel
and an interior annular channel connecting with the inlet and also connecting with
the shaft channel not having direct connection with the central drum, of a whip
drum mounted upon the shaft, provided with an interior chamber encircling a
central hub, and thimbles connecting one of the shaft channels with the interior of
the whip drum, the said channel being provided with a partition between the
thimbles, as and for the purpose specified.
Dated this 29th day of March 1892.
WM. P. THOMPSON & Co.,
Agents for the Applicant.