Improvements in the Means for Loading and Unloading Coal and other Vessels.
Year: 1889

page_text: Date of Application, 9th Nov., 1589-Accepted, 14th Dec., 1889
CODE DELE DE CULTIVATION.
Improvements in the Means for Loading and Unloading Coal and
other Vessels.
I, JOHN HAGEN of Pinna-berg No. 32 Hamburg, in the Empire of Germany,
Inspector, 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 a new device for loading and unloading coal- and other
vessels and has for its purpose to economize time and dispense, especially when
unloading coal steamers, with the so-called "coal jumpers."
The improved arrangement essentially consists of several friction windlasses of
particular construction which are actuated by a steam engine placed on deck. In
most cases, the steam windlasses, erected on almost every coal steamer and always
situated close to the hatchway, will be applicable therefor. These windlasses have
been hitherto employed direct for loading and unloading in such a manner as to raise
or lower only one load, whereas, by my invention, two or more-loads-can be raised or
lowered simultaneously by the combination of a corresponding number of particularly
constructed friction windlasses with the existing steam windlass. At the same time the
so-called "coal jumpers" employed in unloading coal steamers can be dispensed with,
which constitutes a considerable economical advantage for ship-owners.
Referring to the accompanying drawings,
Figs. 1 and 2 illustrate the whole arrangement seen respectively from along and
across the vessel.
Figs. 3 and 4 are rospectively side view and front view of the friction windlass on
an enlarged scale.
D designates the steam windlass, F the friction windlasses, of which, in the
arrangement illustrated, three are supposed to be employed. The revolutions of the
crank shaft are imparted to the common driving shaft w of the friction windlasses
by the spur wheels and pinions k¹².
7'
Each friction windlass consists of a block or frame B secured to the combing or
frame of the hatch and having between its sides the two friction pulleys s s rigidly
attached to the shafts w w¹. The shaft w, having the pin-head rigidly secured
thereto, is excentrically revoluble in the concentric discs provided with two lateral
extensions and revoluble in corresponding bearings in the upper part of the sides
of the frame. To the extensions are attached the bent lever arms h h¹, the shorter
of which carries the poise y', unchangeable in its working point, while the longer
arm is provided with the displaceable poise g. The two-armed lever thus produced
has its fulcrum in the centre of the disc and respectively and is so balanced by
means of the poises as to keep the friction pulleys out of contact while the windlass
is at rest. The contact of the friction pulleys is only established by shifting the
poise, which, in the device represented and in the case of a load of 170 kilogrammes
to be raised, weighs about 7 kilogrammes, to the extremity of the arm h." At the
same time the upper pulleys, and consequently the pin head, is taken along, while
the rope is not wound up, but slung in two or three loops about the pin head, the
running off part of the rope being handed away by the person attending the windlass.
When the load, in the present case the filled basket, has reached the requisite height
above the combing, the poise 9 is advanced, thereby disengaging the upper friction
pulley, which is prevented by the chain e from any falling over to the side of the
poise g¹. In order to allow the upper friction pulley to be put down on the
lower one with sufficient pressure, its excentricity is preferably chosen as small as
possible.

page_text: Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1) A device for loading and unloading coal- or other vessels, consisting of a suitable
number of friction windlasses of the construction specified in claim 2 secured to the
hatch-combing and having a common driving shaft w actuated from a steam windlass
by means of the displaceable spur wheel adapted to engage with the spur wheel r¹,
and pinions k² substantially as and for the purpose set forth.
2) A friction windlass consisting of the two friction pulleys as the larger s¹ of which
is excentrically revoluble with its shaft w', provided with pin head 7, in the concentric
discs which revolve in corresponding bearings in the block or frame B, and is so
balanced by means of bent levers hand poises g g¹ as to allow the upper friction
pulley to be engaged or disengaged by displacing the poise g on the longer lever
arm h, substantially as described.
Dated this 9th day of October 1889.
JOHN
HAGEN.
By Huelser & Co.,
Attorneys.