The Portland daily press. [volume] (Portland, Me.) 1862-1921, 1862-07-22
Proposals for Paddle-Wheel Steam
Machinery for the U. :. Navy.

VyHE NAVY DEPARTMENT will, until the 2sth
Il day of July, receive sealed proposals for the
construction OF steam machinery for Paddle Wheel
Steamers.
Each steamer will have one inclined engine of not
lass than loD cubic feet displacement of piston per
stroke; the length OF the stroke to be about feet
inches The frame to be of yellow pine, strongly
kneed. boted aud braccd.
There will be aSewalPs surface condenser in which
the condensing surface will be composed OF drawn
brass tubes five eighths inch outside diameter tube
and followers of brass total area Of condensing
face 800 square feet capacity of air-pump consider
cd single aciingl rs cubic feet capacity of eireua-
ting pump considered single acting) IS cubic feet
not less than two-thirds of The pumps pistons. re-
ceiving and delivery valves of pumps TO have a net
area OF opening of not less than and half time
the area OF the pumps pistons valve seats of brass
The cylinder is to have brass balance poppet valves
of II and Is inches diameter; valve seats of brass
Steam valve to be arranged with Stevens cut Off
The whole valve gear to be finished and arranged
for working hooked on back as web as ahead.
The cross-head to be of wrought iron and finished
The cranks to be of wrought iron. turned and planned
The shan to be of wrought iron turned. The cut
board Journal is TO be three feet in length.
All cylinder covers. valye-chest and pump bonnets
with their bolts and nuts and links and connecting
rods TO be finished.
punger feed pump and bilge pump of brass. to
be provided of 2 cubic feet capacity valves of gum
to have net opening of twice the capacity OF the
pump
turned and paIed and secured upon turned wrought
iron shaft which is to be worked from the main cross
ea and planned.
The paddle wheel is TO be overhung. 10 be of
wrought ron and IS fee, inches in extreme dame
ter. Paddles to be twenty -four in number feet Q
inches long, and Is inches wide
There to be two Martin boilers placed opposite
each other, with hre-room between. Length OF boil
Is feet. width 10 feet inches height about feet
inehcs to contain five furnaces each: the furnace to
be three feet wide; length of CRATE feet inches;
total CRATE surface 1876 square feet total heating sur
face not less than 5000 square feet Shells with the
exception of the bottoms, to be of 5-l6 inch plate;
bottoms furnaces, and air-pts of three-eighth inch
plate; TO be double riveted and braeed for hydro
static test pressure OF 90 pounds per square inch
Each boiler is to have No. Dimpfel blower blow
ing into the back of the ash-pits.
All the detail. fnish quality of material and work.
manshp TO be first-cass. prcportoned for working
boiler pressure of 40 pounds per square inch and
conformabe TO the specifications previously printed
ed by the Department for paddle wheel machi-
merry There will also be furnished the tools dupli-
cate pieces. instruments, &C., required by those spec
fcafions.
full and of their sureties; the gross covering all
and claims against the government whatever on
account of the machinery. for which they propose
furnish il in the vessel complete and ready for steam
ing discriminating between the two cases of erecting
II in the same port and of transporting and erecting
1t IN another port; and the time from date OF contract
in which they will guaranty TO complete in the
sci ready for sieamng provided the vessel Is ready 10
receive il twentyone DAYS earlier if the vessel is at
the same port. and month earlier if at another
port; Hnot ready, twenty-one DAYS month, ac-
cording 10 the case, will be allowed for completion
from date of readiness.
The contract will embrace the usual conditions and
payments will be made in the usual manner as the
work progresses.
The proposals are to be endorsed Proposals for
Paddle Wheel Steam Machinery" to distinguish
them from other business letters.
The Department reserves the right TO reject any
all of the proposals made under this advertisement
it, in its opinion, the public interests requires.
No proposals will be considered except from pro-
prietors of marine engine building establishments
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