The Portland daily press. [volume] (Portland, Me.) 1862-1921, 1862-07-23
Proposals for Paddle-Wheel Steam
Machinery for the U. $. Navy.

rI,HE NAVY DEPARTMENT will, until the 2;th
II day Of July, receive sealed proposals for the
Steamers
Each steamer will have one inclined engine of not
lass than LOO 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, boicd aud braced.
There viii be sewali's surface condenser in which
the condensng surface will be composed of drawn
brass tubes five cighhs inch outside diameter tube
and followers of brass total area of condensing sur
face 300 square feet capacity of ar-pump consider
ed as single acting % cubic feet capacity of ercua
ting pump considered single actingl Is cubic feet;
inlet and outlet pipes 10 pumps to have net of
rot less than two-thirds of the pumps pisons; re-
eeying 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 poppct valves
of II and Is inches diameter; valve seats of brass
Steam valve TO be arranged with Stevens cut Of
The whole valve gear to be finished and arranged
for working hooked on back rs well as ahead.
The cross-head to be of wrought iron ana finished
The cranks 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 aud pump bonnets.
with their bolts and nuts and links and connecting
rods to be finished.
plungcr feed pump and bilge pump. Of brass. to
be provided of y cubic feet capacity valves of gum
to have ne; opening of twice the capacity of the
pump.
The pumps are TO be worked BY wrought iron arms
turned and planned and secured upon turned wrought
iron shaft which is to be worked from the main
cd and planned.
The paddle wheel is to be overhung. to be of
wrought iron, and 26 feet inches in extreme dame
ter. Paddles TO be twenty -four in number, feet
inches long. and Is inches wide.
There are 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 1876 square feet total heating
face not less than 50Qo square feet Shells with the
exception of the bottoms, TO be of 5l6 inch plate:
bottoms, furnaces, and airpits of threeeghth inch
plate; to be double riveted 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 frstelass, proportioned for working
boiler pressure of 40 pounds per square inch, and
confofnable TO the specifications previously printed
cd by the Department for paddle-wheel steam machi-
merry. There viii also be furnished the tools, dupli-
cate pieces. Instruments &c. required by those speci-
fications.
The proposals will state the names of the bidders in
full and Of their surees the gross covering all
costs and claims against the government whatever on
account of the machinery for which they propose to
furnish il in the vessel, complete and ready for
ing. discriminating between the cases of erecting
il in the port and of transporting and erecting
il in another port and the time from date of contract
in which they will guaranty to complete II in the
sci ready for steamg provided the vessel is ready
receive IL twenyon DAYS earlier ii the vessel Is at
the same port, and one month earlier if at another
port ifnot ready, twenty DAYS one month.
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 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,
ii, 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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