Richmond enquirer. [volume] (Richmond, Va.) 1815-1867, 1817-01-30
From the United States Ga=ette.l
SHIPS PUMPS.
Mr. Bronson,

ihr. Bronson,
In your paper of this evening,
ind an account of a method of pumping ship
by her own motion, TO which d Captain Leslie
resOrted while on recent VOYAGE from Stock
holm TO New-Bedford. Some time since Mr.
Jacob Perkins, of New-Hampshirc, cominuni-
Gated TO me a similar plan, and intended to
exhibit his scheme in the next number of the
Port Folio. That so important method NAV
be made known more generally than it could be-
II confIned to the pages ola literary journal,
send you an eXtiast from the article, which
had prepared. 1t contains the printed direc-
lions which MIR. Perkins has circulated among
naval gentlemen fer three years past. 1 will
only add, that similar idea occurred to Mr..
Abraham WynkOOp, of this city, and he OBJ
tanned patent for his invention about twenty
years ago.
The manner cf~OrGinga Pump by the ships ,cay
0rmOtiOn."
his kind of Pump is better calculated to
work by the ships way or motion than any o.
fher, as the valves are not confined to any part
OF tine Pump, & will accommodate themselves
Ia all the variations of the roll or pitch of the
ship.
" The pitch the ship is the most favorable
for seif,w working Pumps They may also be
worked by the roll or way ofthe ship
The Pumps may be worked by the pitch of
the ship by simply susPending a hogshead or
tierce OF water over the stern of the ship
This hogshead is attached to the
be so adjusted, that were the ship without mo-
ton, the upper valves should be halfway down
the pump. Suppose the ship to pitch SIX feet,
the valves will work three feet below, s. three
feet above The centre OF the pump. The mere
theship pitches, the longer the stroke.
= Tie liogshead is prevented from dragging
when the ship is under way, by two guys The
operation will be thus: When the h0gshead
rises by the sinking OF the stern of the ship the
rope Will slack up, and the valves will SINK bv
their own weight i'll the pump, and when the
stern rises, the weight of the hogshead will
draw up the valves ana discharge in propor-
ton TO the length OF the stroke.
&" The ship may be pumped by the roll bv
rigging the derrick over the side. This mode
Will answer IN calm only. The valves must
be half way down the pump, when the ship is on
an even keel.
These pumps will work as well (after they
are fetched) when the valves are fifteen or
more feet apart, as when close together If the
pumps are not more than thifty-two feet i'm
length.
" TO work the pump by the way of the ship.
log chip of about - feet square is made fast by
guy from each corner of the lOg-chip to the
pump rope, which passes over derrick fixed
at the stern Of the ship. The log-chip when let
down into the water, presents itself at right
angles with the surface oft, ifproperIy balanc-
ed, by weight at the bottom edge. To the log
chip, line is fixed al the upper edge, and as
soon as has drawn the valves 10 the ton of the
pump, il should be stript and drawn in This
can be done by one man, if the slip does NOT
sail too fast. As as the valves aic down TO
the bottom of the pump, the trip-linc must be
Stacked, and the valves are again drawn up aud
thewater discharged"
A AIN, &C.