The Portland daily press. [volume] (Portland, Me.) 1862-1921, 1862-07-31
Proposals for PaddlIe-Wheel Steam
Machinery for the U. s. Navy.

F1yHE NAVY DEPARTMENT will, until the 2sth
4 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 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, bolted and braced.
There will be Sewal's surface condenser in which
the condensing surface will be. composed of drawn
brass tubes five eighhs inch outside diameter; tube
and followers of brass total of condensing
face 300 square feet capacity of ar-pump consider
ed single actngl 25 cubic feet capacity of crcnla
ting pump considered sin gle acting) Is cubic feet;
inlet and outlet pipes to pumps to have net area Of
not less than two-thirds of the pumps pistons
ceiving and delivery valves Of pumps to have 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 dameter valve seats of brass
Steam valve to be arranged with stevens of
The whole valve gear to be finished and arranged
for working hooked on back as well ahead.
The cross-head to be of wrought iron and finished
The cranks to be of wrought IRON turned planned
The shaft TO be of wrought iron turned. The cut
board journal is to be three feet in length
All cylinder covers valvc-chest and pump bonnefs,
with their bolts and nuts and links and connecting
rods to be finished.
A 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
The pumps are to be worked by wrought iron arms.
turned and planned and secured upon turned wrought
iron shaft which is 10 be worked from the main
head by finished links, and wrought iron levers, turn
ed and planned.
The paddle wheel is TO be overhung TO be Of
wrought iron and 2s feet inches in extreme dame
ter. Paddles TO be twenty-four in number. feet
inches long, and Il inches wide
There 10 be two Martin boilers placed opposite
each other with hre-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 5000 square feet Shells with the
exception of the bottoms to be of 5-l6 inch plate;
bottoms, furnaces, and ar-pts of threeeighth 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 hrst-cass. proportoned for working
boiler pressure Of 10 pounds per square inch, and
comfortable 10 the specifications previously printed
cd by the Department for paddle-wheel steam mach-
merry. There will also be furnished the tools. dup
cate pieces, instruments, Sc, required by those spec
fcations.
The proposals viii state the names of the bidders in
full and of their sureiies; the gross sum- covering all
costs and claims against the government whatever
account of the machinery, for which they propose to
furnish il in the vessel, complete and ready for steam
ing, discriminating between the of erecting
II in the same port and of transporting and erecting
il in another port and the time from date of contract
10 which they will guaranty complete il in the YES
sci ready for SCANNING provided the vessel is ready to
receive IL twenty-one days earlier il the vessel Is
the same port, and month earlier If Mt another
port ifnot ready twenty -one days month, ac-
cordng 10 the ease, will be allowed for completion
from date of readiness
The contract viii embrace the usual conditions and
payments viii be made in the usual manner 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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