gery 
[Dec.’ 
NEW PATENTS 
Enrolled in the Mouths of Oéteber and November. 

STEEDMAN’s THRESHING MACHINE. 
N the 31f of Oétober, letters patent 
were granted to Mr. JOHN STEED- 
MAN, of Toft-farm, in the parifh of 
Trentham, in the county of Stafford, for 
his invention af a machine for threfhing 
- corn, which promifes to fave much ma- 
nual labour, and more effe€tually feparate 
the grain from the ftraw. 
The machine may be worked either 
by horfes, wind, water, or fteam. That 
conftruction of it, defcribed by the pa- 
tentee in the fpecification, is intended to 
ke worked by horfes. 
It confifts of a borfe wheel of 120 cogs, 
worked by two levers in a circumference 
of 18 feet. Conneéted with the horte 
wheel is a tumbling fhaft, which is work- 
ed by 20 cogs, afhxed to that end of.it 
which adjoins the horfe wheel. At the 
other extremity of the tumbling fhaft, is 
a fpur wheel of 72 cogs. Connected 
-with the fpur wheel, and turned by it, is 
a horizontal fhatt called the fla‘/ barrel, 
Atone endof the flail barrel are afixed 20 
cogs, which work in the fpur wheel, and 
along and upon the furface of the barrel 
itfelf are morticed 10 or 12-fiai/s. The 
flails are made of wood with iron joints, or- 
the ftriking parts may be wholly ofron. | 
In order to apply the ftraw, that it 
may meet with the ftrekes of the flail, 
produced by the turning of the flail bar- 
rel, it is placed on acircular and moving 
floor, which is fituated about two feet and 
a half above the level of the ground floor. 
This floor is put mto c7rcvlar motion by a 
band, which is conneéted, by means of 
two pullies, with the tumbling fhaft, and 
thereby turns the floor one revolution in 
about 30 feconds. ‘The floor is compofed 
of planks, which, not being clofely unit- 
ved, permit the corn to run between them 
upon the ground floor. 
The motion is not fo great but that the 
ftraw is eafily changed, as foon as the 
grain is feparated, without ftopping the 
machine. To prevent the ftraw from 
falling off the floor by the aétion of the 
flails, a fimi-cylindrical cap is applied, at a 
convenient diftance, round the flail bar- 
rel. 
By this machine, which promifes to be 
a great acquifition to the agricultural 
art, two-horfes, one boy, and two men, 
may perform-bufinefs equal to what is 
performed by 12, 14, or 16 men, in the 
prefent mode of threfhing. The quan- 
tity of bufinefs performed varies with 
the fpecies of grain. The machine has 
hitherto been ufed to the greateft ad- 
vantage upon oats. Its price will be 
about 45l. 
PEPPER’s OVENS, OR KILNS. 
Letters patent have been granted te 
Mr. Joun PEPPER, architect, of New- 
caftle-under.-Line, for his invention of an 
oven for the burning or firing of china, 
porcelain, earthen-ware, bricks, tiles, 
&c. and for the fufion of ores, &c. By 
this invention, the patentee afferts, that, 
there will be confiderable. faving of fuel, 
and a more regular, equable, and propor- 
tionate degree of heat applied in every 
fituation of the atmofphere, and in every 
circumftance required, than can be ob- 
tained in ovens or kilns made in the ufual 
way. atoll . 
The principle of the invention confifts 
in fuch a compound or circuitous courfe 
of the flues or fire bags, as to occafion the 
courfe of the flame, or combuftible matter, 
to pafs three times through the interior 
of the oven. This is eifeéted by turning 
the flue, after it has afcended to the upper 
part of the oven, down again nearly te 
the level of the fire, where it enters the 
central flue, which communicates with the 
atmofphere. So that the flame, or courfe 
of heat, firft afcends, then defcends, and 
afterwards afcends again; it confequently 
paffes three times through the oven. — — 
Thefe ovens may be made in any form, 
round, fquare, or oétagonal; and the 
number of fire places, in their circum 
ference, may be varied at pleafure. Re- 
gifters are provided for the admiffion of 
air into the flucs, and others for regulat- 
ing the efcape of the heat from the cen- 
tral flues. As the courfe of the flame 
paffes through fo long a circuit, the heat 
is almoft wholly exhaufted within the 
oven, and little of it efcapes from the 
central flue, as there does in ovens or , 
kilns conftruéted with fingle, ftraight, and 
perpendicular flues. 
The f{pecification, as filed in the Petty 
Bag Office, is accompanied by fix draw~ 
ings, which completely illuftrate every 
part of the above defcription ; and alfo, 
fome other particulars which cannot be 
perfpicuoufly defcribed without their aid. 
JORDAN'S 
