The Portland daily press., 1862-07-29
Proposals for Paddle-vSheeI Steam
Machinery for the U. 5. Navy.

THE NAVY DEPARTMENT will, until the 2,sh
Il day OF July, receive sealed proposals for the
steamers
Each steamer viii 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, bottled and hraced.
There will be Sewalfs 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 area of cordensing sur
face $500 square feet capacity of arpump consider
ed single actingl Is cubic feet capacity OF crcua
ting pump considered single acting % cubic feet;
MET aud outlet pipes to pumps TO have net area Of
not less than two-thirds 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 aud ~ 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 well as ahead.
The cross-head TO be of wrought iron and finished
The canks 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 valye-chesf and pump bonnets,
with their bolts and nuts and links and connecting
rods 10 be finished.
A punger feed pump and bilge pump, of brass 10
be provided OF 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 planned and secured upon turned wrought
head by finished links, and wrought iron levers turn
ed and planed.
The paddle wheel is to be orerhung to be of
wrought iron and % feet inches in extreme diamc-
ter Paddles to be twenty-four in number, s feet
inches long, and Is inches wide.
There are TO be two Martin boilers placed opposite
each other, with freroom 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 1876 square feet total heating
face not less than 5000 square feet. Shells. with the
exception of the bottoms to be of sis inch plate;
bottoms furnaces, and air-pts of threeeighth inch
plates to be double riycted and braced for hydro
static test pressure of 80 pounds per square inch.
Each boiler i to have No. Dimpfel blower blow
inginto the back Of the ash-pits
All the detail, finish quality of material and work
manship to be irsf-eass proportional for working
boiler pressure of 40 pounds per square inch. and
coniormabe TO the Specifications previously printed
cd by the Department for paddle-wheei steam maeh-
merry. There will also be furnished the tools, dup-
cate pieces instruments, Sc, required by those spec
hcations.
full and of their sureties; the gross sum- covering all
costs and claims against the government whatever ON
account of the machinery, for which they propose to
furnish II in the vessel, complete and ready for steam
ing, discriminating between the two of erecting
il in the port and of transporting and erecting
II IN another port and the time from date of contract
III which they viii guaranty to complete il in the
sci ready for Steamng provided the vessel is ready
receive IL twentyone DAYS earlier IL the vessel is al
the same port and one month earlier il at another
port; ifnot ready, twenty-oue 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
Paddle Hheei Steam Machinery" 10 distinguish
them from other business letters.
The Department reserves the right TO reject any or
all of the proposals made under this advertisement,
it, in its opinion, the public interests requires.
prietors Of marine engine building establishments
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