The Portland daily press. [volume] (Portland, Me.) 1862-1921, 1862-07-24
for Paddle-vyhceI Steam
Machinery for the U. 5. Navy.

fHNHE NAVY DEPARTMENT will. until the 26th
Il day of July, receive sealed proposals for the
construction OF steam machinery for Paddle Wheel
Steamers.
Each steamer viii have one inclined engine of not
lass than leo 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 boltcd and braced
There will be Sewals surface condenser, In which
the eondensing surface win be composed of drawn
brass tubes five eghths inch outside diameter: tube
and followers of brass total area of condensing
face 300 square feet: capacity of airpump consider
cd single acng 25 cubic feet capacity creula-
ting pump considered single aeng % cubic feet
not es. ban twothrds Of The pnmns n;stons a 10.
ceiving and delivery valves of pumps TO have net
area OF opening of not less than one and half time
the area OF the pumps pstons; valve seats of brass
The cylinder to have brass balance poppet valves
of IL and IS inches diameter; valve seats Of brass
Steam valve to be arranged with stevens cut Of
The whole valve gear to be finished aud arranged
for working hooked on back a well as ahead.
The cross-head TO be of wrought iron and finished.
The eTanks to be of wrought iron turned and planned
The shaft TO be of wrought iron turned. The cut
board Journal is to be three feet in length.
All cylinder covers, yalye-chest and pump bonnets,
with their bolts and nuts and links aud connecting
rods TO be finished
plunger feed pump and bilge pump. of brass TO
be provided of n cubic feet capacity; valves of gum,
to have net opening of twice the capacity of the
pump.
The pumps are TO be worked by wrought iron arms.
turned and plancd and secured upon turned wrought
iron shaft which is to be worked from the main
head by finished links and wrought iron levers turn
cd and planned.
The paddle wheel Is to be overhung. 10 be Of
wrought iron, and % feet inches in extreme dame
ter. Paddles to be twenty -four in number, feet
inches long, and Is inches wide.
There to be two Martin boilers placed opposite
each other. with ire-room between Length of boil
Is feet width 10 feet inches height about feet
inches; to contain five furnaces each; the furnace
be three feet wide length of CRATE feet inches
total CRATE surface l5 square feet; total heating
face less than 500 square feet Shells with the
exception of the bottoms, TO be of 5l6 inch plate;
bottoms, furnaces aud airpits of three-eighh inch
plate; TO be double ryeied and braced 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 finish. quality of material and work
manship TO be frstclass proportioned for aworking
boiler pressure of 40 pounds per square inch, and
confOrmable TO the specifications previously printed
ed by the Department for paddle-whcel steam mach-
merry. There will also be furnished the tools dup-
cate pieces instruments, &c. required by those spcc
feations
The proposals will state the names of the bidders in
full and of their sureties; the gross covering all
costs ard claims against the government whatever ON
account of the machinery. for which they propose to
furnish il in the vessel complete and ready for steam
ing discriminating between the two cases of erecting
il in the same port and of transporting and erecting
il in another port; and the time from date of contract
in which they will guaranty TO complete it in the
sci ready for seamng provided the vessel is ready to
receive II weDty0ne days earlier IL the vessel Is Mt
the same port, and month earlier if at another
port; ifnot ready, twenty days month"; ac-
cording TO 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
Paddie-Uheet 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
il, in its opinion, the public interests requires.
No proposals will be considered except from pro-
pretors of marine engine building establishments.
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