372 Patents lately Enrolled. 
sides of waggons and carts. Mr. R. 
makes use of the power of the lever and 
wedge in the construction of all artillery 
carriages, and any others with four 
wheels: 
s Saieaceeneee 
MR. ISMES BARRON’S (WELLS-STREET), 
Jor Improvements in the Apparatus used 
for Rollers for Window Blinds, Maps, 
Se. 
jn a figure given with the specification, 
we have a front view of a window blind 
or roller map when fixed in its place. 
The brackets are fastened to the lath, 
and suspend the roller by pivots or coni- 
eal sockets, which are preferred as pro- 
ducing less friction. The bracket is a 
spring fastened on the top of the lath, 
the use of which is to keep the blind to 
any part of the window where it 1s drawn 
to. It is revulated or made to act with 
more or less force by a wedge which cau- 
ses it to raise the raller, and to press the 
pulley more orless against-an iron or metal 
plate, fixed to the under side of the lath. 
The wedge moves ina slanting bed, sunk 
im the top of the lath under the spring, 
and crosswise to it. The wedge 1s 1no- 
ved backwards and forwards by a screw 
let through the edge of the lath, which 
causes the wedge to rise above the sur- 
face of the Jath, and bear up the spring 
‘Seith it.. The blind being drawn down- 
wards, the pressure of the pulley against 
the lath produced by the spring bracket, 
prevents the weight of the blind from 
ruuning itdown. In like manner, when 
the blind is to be rolled up, hy pulling the 
line, the spring being then drawn down, 
the pressure of the pulley will be removed, 
and the blind rolls up freely to any height 
desired; for by ceasing to pull the line, 
the spring immediately presses the pulley 
against the plate, which stops all farther 
motion. The line winds round a small 
spindle, between two circular plates, in 
the usual manner. The bracket may be 
fixed in the under side of the lath, and 
contrived to slide outwards, in order to 
withdraw the pivot, and allow the roller 
to.be taken down at pleasure, for clean- 
ing or preserving the blinds. The 
bracket slides between a metal plate and 
the lath, and’itis retained to the plate 
at the outer end by a staple; and the end 
of the bracket has a button which slides 
through aslit in the plate, and keepsthat 
end of the bracket steady. The slit has 
a notch in the side, at the inner extre- 
mity,.into which the button is forced by 
a spring that moves the end of the bracket 
sideways when it is drawn in, and this 
[May I, 
keeps the pivot of the roller tight. When 
the blind is to be taken down, the button 
is to be pushed cut of the notch, and as 
the button is Grawn along the slit, the 
bracket will slide out and release the 
pivot. 
EE 
MR. JOHN FREDERICK ARCHBOLD 'S(GREAT 
CNARLOTTE-STREET, SURRY), for 4 
Method of converting Salt or Sea-water 
into Fresh-water, both on Land and on 
board of Ship at Sea, 
This invention is intended to produce 
pure fresh water from sea-water by dis- 
tillation, on a_ principle of filtration. 
For this purpose stills of a new construc- 
tion are used, each of which has an out- 
ward case of metal; between the imterior 
sides and bottom of which, and the exte= 
rior bottom aud sides of the still, a space 
is left vacant: but the still is inserted into 
the case in such a manner that there 
shall be no egress for the steam from the 
case, except by a safety-valve. The ~ 
head and neck aré affixed to the still; 
thus, the water in the cases, not having 
the pressure of the atmosphere, will rise 
much beyond the boiling heat, and make 
the stills, which are inserted in them, 
boil also; and there being no egress for 
the steam froin the case, except by the | 
safety-valve, a small fire will suffice to 
keep up this degree of heat. From that 
part of the case which comes in immedi- 
ate contact with a fire, a flue may be in- 
serted, which, making some horizontal 
revolutions alung the bottom, may: pass 
out into the chimney. The back also of 
the fire-place can be a narrow boiler, 
which may communicate with the cases 
of the still. When performed on board 
of ship a reservoir of salt water is placed 
upon the deck of the vessel, through 
which the chimney of the fire may pass 
and impart its heat; and from thence 
pipes, having a cock attached to each, 
lead into the cases and stills for the pur- 
pose of their supply. From the necks-of 
the stills, pipes are brought conducting 
the steam into vessels for cooking pro- 
visions. The range has two metal doors. 
in front, each of which is attached by 
hinges to iron bolts: these bolts fit into 
staples affixed in the side of the range, 
so that when the fire is not wanted for 
cooking, it can be enciosed by these 
doors; but when required, the doors can 
be drawn out the length of the bolts, fit- 
ting into the staples at the side of the — 
range, and form a screen, between which 
and the fire, the meat can be roasted. 
For the purpose of condensing steam on 
hoard 
