The Portland daily press., 1862-07-17
Proposals for Paddle-VVheel Steam
Machinery for the U. s. Navy.

IVNHE NAVY DEPARTMENT will, until the 2sih
Il day of July, receive sealed proposals for the
construction of steam machinery for Paddle Wheel
Each steamer will have one inclined engine of not
lass than l60 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. bolted and braced.
There will be Sewail's surface condenser in which
the condensing surface will be composed of drawn
brass tubes live eighihs inch outside diamefer tube
and followers of BRASS total area of condensing
face 300 square feet capacity of arpump consider
cd as single acting Is cubic fcet capacity of circua
ting pump considered single acfingl Is cubic feet,
inlet and outlet pipes to pumps to have net area of
not less than twothirds of the pumps pistons; re-
ceiying 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
valves of gum.
The cylinder is to have brass balance poppet valves
OF Il 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 well as ahead.
The sshead to be of wrought iron aud finished
The cranks to be of wrought iron. turned and planned
The shan 10 be of wrought iron turned. The cut
board journal is to be three feet in length.
All cylinder covers, valve-chest and pump bonncts
with their bolts and nuts and links and connecting
rods TO be finished.
plunger feed pump and bilge pump, of brass, TO
be provided of q cubic feet capacity valves of gum
TO have net opening of twice the capacity Of the
pump.
turned and planned and secured upon turned wrought
iron shaft which is to be worked from the main cross
Is. IL
ed and planned
The paddle wheel is to be overhung. to be of
wrought ron and 26 feet inches in extreme diame-
ter. Paddles 10 be twenty -four in number, feet 3
inches long, and Is inches wide.
There are to be two Martin boilers placed opposite
each other, with frcroom between. Length of boil
Is feet, width 10 feet inches, height about feet
inches to contain five furnaces each the furnace to
be three feet wide; length of crate feet inches ;
total CRATE surface l95 square feet total heating
face not less than 5000 square feet Shells, with the
exception of the bottoms, TO be of 5-l6 inch pate
bottoms furnaces, and airpits of three-eghth inch
plates to be double riyeted and braced for hydro
static test pressure of 60 pounds per square inch
Each boiler is TO have a No. Dimpfel blower blow
ing into the back of the ashpits.
All the detail, finish, quality of material and work.
manship TO be frsiclass, proportional for working
boiler pressure of 40 pounds per square inch. and
conformabe to the specifications previously printed
ed by the Department for padde-whee steam machi-
merry. There will also be furnished the tools, dup-
cate pieces, Instruments &c. required by those spcc
hcations.
The proposals will state the names of the bidders in
full, and of their surces the gross covering all
costs and claims against the government whatever on
account of the machinery for which they propose 10
furnish it in the vessel complete and ready for
ing, discriminating between the two of erecting
il in the port and of Transporting and erecting
IL in another port and the time from date of contract
sci ready for seamng, provided the vessel is ready to
receive II tweny-one days earlier if the vessel i at
the same port, and one month earlier If at another
port if not ready, twenty DAYS or ono month ac
cordng 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
Paddle Wheei Steam Machinery" TO distinguish
them from other business letters.
The Department the right TO reject any or
all of the proposals made under this advertisement
If. in its opinion, the public interests requires.
No proposals will be considered except from pro-
prietors Of marine engine building establishments.
jul4eod3w