5T2 
[Jan. 1, 
Patents lately Enrolled, 
through the body of the-lamp to the cen¬ 
tre of the wick-circle, and the glass chim¬ 
ney is elevated about an incii above the 
flame, by which means the greatest pos* 
sible quantity of atmospheric air is 
thrown upon the flame: of course there 
is an abundant supply of oxygen, which 
occasions the complete combustion of all 
the inflammable matter ; the whole of 
the smoke is consunred, and produces the 
most brilliant light that can be conceived. 
We have been led to a comparison of 
the Argand and Liverpool lamps, from 
having seen contiguous shops in the city 
lighted with them, and not from any 
knowledge that we have, either directly 
or indirectly, wdth the patentees of the 
latter: we have not even met with that 
aid from the agent in London, which we 
might naturally expect, in our endea¬ 
vours to describe a new invention; never¬ 
theless, we must acknowledge, that there 
appears an evident and great superiority 
in favor of the Liverpool lamp; and, un¬ 
less there prove, by long use, defects, of 
which, by a short acquaintance, we are 
rot aware, it will, we conceive, obtain 
general notice, 
iiR. JOSEPH dyer's (London), for a mcf 
chine for cutting or removing all the 
rarious kinds of furs which are used in 
hat-making, from skins, and for cutting 
the said skins into strips or small pieces. 
In this specification, we have ditferent 
perspective views of the machine made 
use of in tlie operations for which a 
patent has been granted. Independent¬ 
ly Of tlie frame, which is made of cast- 
iron,or other suitable material, on which 
the several parts of the machine are ad¬ 
justed and supported in their operation ; 
there is a drum-shaped wheel so hung as 
to turn freely on an axis. Tliis wheel is 
composed of twm cast-iron wheels, the 
arras of which are fastened on the said 
axis ; on the peripheries of these, a rim 
of wood is fitted and flrmly secured by 
screws, and the whole turned true on the 
axis. The rim is divided into eight equal 
spaces on each side round its whole cir¬ 
cumference, and grooves cut therein, ex¬ 
tending from the opposite sides towards 
the centre, so as to diverge a little from 
the line of its axis, and thereby form 
angles with each other, and with the axis 
of the said wheel. In these grooves the 
cutters are bedded and held Arm; the 
number of them will depend on the size 
of the drum-wheel to be used, and the 
degrees of tl>€ angles in which they are 
reauired to be set; the cutters should be 
made of cast-steel, about the one-eighth 
of an inch thick, five-eights wide, and of 
a length proportioned tolhe width of the 
drum-wheel, in such a manner as toextend 
from the edges to the centre of the peri¬ 
phery : these cuflers should be fixed in the 
wood rim, so as to pr ject out, or stand 
up, from the smooth surface of the wood, 
about one eighth of an inch from the 
centre of each cutter; and the ends at 
the centre of the rim should be made to 
project more than those at the sides by 
about the sixteenth part of an inch. 
There is also a knife made of a straight 
plate ofsteel, ground to a keen edge at 
top, through its whole length, which ex¬ 
tends across the machine, just in front 
of the drum-wheel, so that its edge is 
parallel to the axis of the said wheel: 
to secure the knife in its place, so that it 
shall be kept steady, and be allowed to 
move freely backward and forward a 
little, or approach to, or recede from, 
the drum-wheel, as is requisite iu I'ne act 
of cutting, it is provided with a fiame 
or support, which is hung in grooves, or 
hollows, made to receive its ends in tlie 
opposite sides of the great frame, and so 
disposed as to turn on a hinge, or to 
move freely backward and forward a lit¬ 
tle therein; and the knife, being fitted 
into this frame, will be held steady, and 
permitted to approach to, or recede 
from, the drum-wheel, as the edges of the 
cutters on the wheel are successively 
brought in contact with the edge of the 
knife, while the wheel is made to revolve 
in the act of cutting : this straight knite 
is all the time pressed towards the drun:i- 
wheel, by springs which are adapted to 
act against its back-side, or against the 
frame in which it is placed; and there 
are regulators, or stops, fixed in such 
way as to be easily adjusted on the main 
frame at each end* of the knife, whereby 
its progress is arrested in its tendency to 
approach the drum-wheel, as it falls off 
successively from its action against the 
edges of tlie cutters; and it is impelled 
thereto, by the action of the springs; 
the ends of the cutters in the drum- 
wheel being made to rise but little above 
the surface of the wood at each side of 
the said wheel, and to increase in the dis¬ 
tance therefrom towards their other ends, 
their edges will thereby be made to fall 
gently on that of the straight knife, and 
to pass over it, without any jar or injury 
to the edges, as they are successively 
brought in contact by the revolution of 
the said wheel : the cutters in the di nm- 
wheel should be placed therein, at sucU 
