The Portland daily press. [volume] (Portland, Me.) 1862-1921, 1862-07-30
Proposals for Paddle-vVheeI Steam
Machinery for the u. s. Navy.

| TVVHE NAVY DEPARTMENT will until the 2sth
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 l6g 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 win be sewalls surface condenser in which
the condensing surface will be composed of drawn
brass tubes five eighths inch outside diameter: tube
and followers of brass; area of condensinr sur
face $500 square feet; capacity of air-pump consider
cd single acng % cubic feet; capacity Of circula-
ting pump considered single acting . cubic
inlet and outlet pipes TO pumps to have net of
not less than two-thrd's of the pumps pstons; re-
ceiying and delivery valves of pumps to have net
area of opening of not less than and half time
the area of the pumps pisons; valve seats of brass
valves of gum.
The cylinder to have brass balance poppct 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 as well as ahead.
The cross-head to be of wrought iron and finished
The cranks to be of wrought iron. turned and paned
The shaft TO be of wrought iron turned. The cut
board Journal is to be three feet in length.
All cylinder covers, yalyc-chcst and pump bonnets,
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 81 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
iron shaft which is TO be worked from the main cross
head by finished links, and wrought iron levers,
ed and planed.
The paddle wheel is to be overhung. to be of
wrought iron and Is feet inches in extreme diame-
ter. Paddles TO be tweniy-four in number s feet
inches long, and Il inches wide.
There are 10 be two Martin boilers placed opposite
each other with fre-room between. Length OF boil
or Is feet width 10 feet inches. height about feet
inches: to contain five furnaces each; the furnace 10
be three feet wide; length Of CRATE feet inches;
total crate surface 1856 square feet total heating
face not less than 5000 square feet. Shells with the
exception of the bottoms 10 be of 5-l6 inch plate:
bottoms furnaces, and ar-pits of tbree-eighth inch
plate; 10 be double riveted and braced for HYDRO
static test pressure of 90 pounds per square inch.
Each boiler Is TO have No. Dmpiel blower blow
ing into the back of the ash-pits.
All the detail, hnlsh, quahty OF material and work
manship 10 be irst-class, proportional for working
boiler pressure of 40 pounds per square inch and
conformable TO the specifications previously printed
ed by the Department for paddle-wheel steam machi-
merry There will also be furnished the tools dupl-
cate pieces, instruments, &c. required by those speci
ficaiions.
The proposals will state the names of the bidders in
null and of their suretes the gross covering all
costs and claims against the government whatever
account of the machinery, for which they propose
furnish ii in the vessel complete and ready for steam
ing, discriminating between the two cases erecting
il in the port and ofJransporting and erecting
IL in another port and the time from date of contract
in which they will guaranty 10 complete IL in the
sci ready for steaming provided the vessel is ready
receive II twenty-one days earlier If the vessel Is
the same port. and month earlier ii at another
port ifnot ready twenty-one DAYS or one month.
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 Uheet Steam MACHINERY" to distin guish
them from other business letters
The Department the right to reject any or
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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