Pipes when Lifting ships' Anchors. IN THE HAWȘEPIPES WHEN LIFTING
Year: 1885

page_text: Pipes when Lifting ships' Anchors.
We ALEXANDER ARCHIBALD MCDOUGALL Shipbuilder and FREDERICK THOMPSON
Ironfounder both of Maitland in the County of Hants Province of Nova Scotia and
Dominion of Canada do hereby declare the nature of our invention for DIMINISHING
THE FRICTION OF THE CHAIN IN THE HAWȘEPIPES WHEN LIFTING SHIPS ANCHORS
to be as follows:-
―:
A chair carrying a pulley or roller is placed upon the deck between the windlass
and hawsepipe at such an elevation as to receive upon the pulley the weight of the
chain and anchor when the chain is coming in, thus removing friction from the
hawse pipe.
The intention of the inventors is to throw the pulley out of gear when the chain
is running out, by causing the roller to run away from its upper socket, down an
inclined plane, to a lower socket, where it will not receive the weight of the chain,
nor support it. When the chain comes in, it draws, by means of the application of
a devil's claw or parbuckle, if needed, the roller from the lower socket, up the
inclined plane, and into the upper socket in the chair, where it takes the weight
and relieves the friction in the pipe.

page_text: Pipes when Lifting Ships'. Anchors.
We ALEXANDER A MCDOUGALL and FREDERICK THOMPSON 16 Bothwell Street
Glasgow, do hereby declare the nature of the said invention for DEVICE FOR
DIMINISHING THE FRICTION OF THE CHAIN IN HAWSE PIPES WHEN LIFTING SHIPS
ANCHORS "and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
In weighing anchor a large number of men have to be employed owing to the
excessive friction caused by the passage of the cable at a sharp angle over the
upper edge of the hawse pipe to the windlass or capstan. Now the object of my
invention is to provide means whereby the cable may be made to travel from the
hawse pipe at a greatly reduced angle, and so allow the required work to be done
with considerably less power.
My invention consists essentially in employing between the hawse pipe and
windlass a pulley and a carrier having an inclined plane so arranged that.when the
cable comes in the pulley is raised up the incline and reduces to a large extent the
friction between the said cable and the upper edge of the hawse pipe. When
the cable is let go the pulley slides down the incline and is out of gear whilst the
cable is running out.
effect.
Fig. 1 is a sectional view showing one method of carrying my improvements into
a skin of ship or vessel, bhawse pipe, c cable, d windlass, e deck, f pulley
with spindle g h carrier firmly bolted to the deck and made with the inclined
plane and socket k, l claw or clutch by which the pulley is connected to the
cable.
The action is as follows:-Whilst the ship is at anchor the spindle of the pulley
rests at the lower part of the inclined plane i out of contact with the cable. When
it is desired to weigh anchor the pulley spindle and cable are connected by the
claw or clutch l, and motion is given to the cable by the windlass in the usual way.
As the cable comes in the pulley is dragged by means of the claw or clutch up the
inclined plane i, until the spindle of the pulley rests in the socket k. The claw or
clutch is then removed and during the remainder of the time the cable is coming
in the said pulley takes the main strain of the cable, and revolves freely in the
socket /c.
If desired the inclination of the plane i may be greater or less than that shown,
and may vary with the angle of the hawse pipe, and the pulley may be so made
that the cable will catch it when coming in and cause it to rise to the top of the
incline,

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, We declare that
what we claim is
First. The combination of a pulley with a carrier having an inclined plane
substantially in the manner and for the purpose setforth.
Second. The combination of a pulley and carrier having an inclined plane, with
a claw or clutch substantially in the manner and for the purpose setforth.
Third. The combination of a pulley with a carrier having an inclined plane and
socket substantially in the manner and for the purpose setforth.
J. T. KING,
Per W. B. Johnson,
Agent.