1804.] 
Re ye : . 
NEW PATENTS LATELY ENROLLED. ~~ 
ee 
MR. BOOTH-HODGETT’s (DUDLEY) for 
_ Machinery for rolling Iron for Shanks, 
and for forming the fame into Shanks for 
Nails. 
HE method ufed in rolling irom is 
TT well known, the variation adopted 
by the patentee is obtained by having 
one roller perteétly cylindrical, or in the 
ufual form of rollers, and the other, at 
proper intervals, 1s fo indented as to 
form the thanks of nails at once, by 
making them thick at one end, and'\run- 
ning off to a point at the other. It is 
evident that by a contrivance of this kind 
the operation of nail-making muft be 
greatly expedited. That part of the 
bufinefs which relates to the making of 
the heads is to be done in the ufual way. 
In the cafe of brads, where heads are not 
wanting the whole operation is perform- 
ed at once. The indentations on the 
roller are of courfe made of different 
Jengths according to the fize of the nails 
wanted. 
MR. STEPHEN HOOPER’S (WALWORTH) 
jor Machinery for cleanfing of dry and 
other Harbours ;—opening a Channel 
through Sands at Sea, Gee. 
The apparatus to keep off the back 
water, and the refervoir,, may be built 
of any dimenfion of timber or other ma- 
terials, of a concave form, in the propor- 
tion of about thirty feet in length, to 
twenty in breadth. If built of timber, 
a number of fquare piles muft be placed 
at about two feet afunder, and of fucha 
length as, when driven fufficiently deep, 
to leave the upper }art of them on a 
level with the top of the pier-head. A 
row of thefe piles. being placed in the 
front, another row muft be driven clofe 
to the pier-head, and a range to form 
eachend. The front and back rows mut 
be ftrongly fixed or locked together by 
timber, framed acrofs and keyed, and 
the piles at the ends in the fame manner, 
fo that the whole may be fufficiently 
ftrong to confine the body of water con- 
tained in it, and to withftand the action 
of the fea againit it. The front. part of 
the refervoir, and the end next the fea, 
mu be fupplied with a number of blocks 
or pieces of timber, abour twelve inches 
{quare framed between the piles from the 
bottom to the top, to be flush or fquare 
with the infide of the piles, for valves to 
fut apainit: thefe blocks muft be placed 
about a foot afunder, by which openings 
» Monruty Mac, No. 112, 
fication is an horizontal windmill. 
will be formed between the piles, of about 
two feet wide by one foot deep. To each 
of thefe fpaces, a valve mult be fixed, ’* 
opening inwards, freely to admit the 
water, when the waves drive againtt the 
refervoir ; and then, by ctofing when the 
wave retires, prevent the water from re- 
turning. The bottom of this refervoir 
muft be made water-tight, that part only 
excepted, which communicates with a 
tunnel, which ts made of proper dimen- 
fions to convey the water from the refer- 
voir to the upper part of the harbour. 
This tunnel muft be fixed along by the 
infide of the pier-head clofe to the ground, 
and filled with a number of flaices about 
ten feet diftant from each other. In 
cleanfing a dry-harbour, the perfon em- 
ployed to fuperintend the bufinefs muft 
at high water open the fluice next above 
the waters edge ; and when the fea runs 
high, the next below it (for the water 
in the tunnel will, by the action of the 
waves on the refervoir, be confderably 
higher than the tide itlelf, or level of the 
water in the harbour: and the current 
from the fluice will drive the foil ic meets 
with into the water); and as the tide 
ebbs he muft open anotaer fluice, and 
then another, and fo on: this procefs 
will {cour from each part of the harbour 
along the head in fucceffion, a quantity 
of {oil proportioned to the height of the 
tide, and of the water driven into the 
refervoir. 
The next thing defcribed in this fpeci- 
Then 
a machine for pecking up rocks under 
water, fo.as to. open or affift in making a 
navigation. The peckers may be fixed 
by different machinery to work by the 
motion of the veffel; but in cafes where 
the veffel has no motion, the peckers may 
be worked by a roller having a number 
of cogs about three fourths of the way 
round it, for another fet of cogs fixed to 
the pecking bars to work into. On the . 
turning of the roller, the bar is raifed up 
till it comes to that part of the roller 
where there are no cogs, when it frees it- 
{elf and drops down with velocity to peck 
the ftone. Thefe rollers may be- put in 
motion by maoual labour, horfes, wind, 
or water, and may be worked with dif- 
ferent machinery. 
A fhifting keel to affift fhips, hoys, 
barges, &c. going to the windward ; and 
a lighter for {coming away bars, &c. are 
reprefented by plates, and defcribed in 
