A NEW MACHINE FOR SEPE- BATING ALL KINDS OF METALS FROM SLAGGS
Year: 1777

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANCIS
THOMAS, of Ludgvan, in the County of Cornwall, Smelter, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Tenth day of June, in the seventeenth year of His reign, did
give and grant unto me, the said Francis Thomas, His especial licence that I,
the said Francis Thomas, during the term of years therein expressed, should
and lawfully might make, use, exercise, and vend, within England, Wales, and
Town of Berwick-upon-Tweed, my Invention of "A NEW MACHINE FOR SEPE-
BATING ALL KINDS OF METALS FROM SLAGGS;" in which said recited Letters Patent
there is contained a provisoc obliging me, the said Francis Thomas, within four
calender months after the date of the said recited Letters Patent, to cause
a particular description of the nature of my said Invention, and in what
manner the same is to be performed, by an instrument in writing under my
hand and seal, to be inrolled in His Majesty's High Court of Chancery, as in
and by the same (relation being thereunto had, may more fully and at large
appear.
NOW KNOW YE, that in compliance with the said provisoe, I, the said
Francis Thomas, do hereby declare that my said Invention of a New

page_text: Machine for Seperating all Kinds of. Metals from Slaggs is described in the
Plan thereof hereunto annexed.
In witness whereof, I, the said Francis Thomas, have hereunto sett my
hand and seal, this Nineteenth day of July, One thousand seven
hundred and seventy-seven.

page_text: 1. An
a view of the Mill with a Tection of the House.
upright.
Axeltree, in which, the Lever B. C. is fixed. on the sides whereof, at B are ·fastened two Rakes for turning
whose teeth intervene each other as at Fig: 2. At C, a Horse or other Cattle or, a Water or Wind Mill Wheel is placed, to put the Roller s
over the Stag in
Rakes in motion.
D. A Roller made of Stone or other materials.
· pendant from the Lever B. C. and their fastnings
as at M, Fig: 3.
are N. N
EE. Two Sieves for separating the Slag after it is milled, which are,
F. A Box in each Sieve which contains a Spring
G.G. Coggs, placed round the inner trough, against which the Sieves strike, which, with the assistance of the Spring M. Fig: 3 keeps them
motion.
H. A Cogg Wheel to be worked by Wind, Water, or Cattle.
J. A
trough for the Roller and Rakes to work in.
Is the ground,
a circular hough which receives the Stag from the Sieves.
I. A Section of the House .
Figh. An Elevation of the Rakes, with the manner in which their Teeth intervene.
ig: 3. A view of the spring contained in the box F bệ
of the Sieves with it's spring.
94. A plan of one.
75. A plan of the Roller.
7. 6. A plan of the Troughs.
7:7. A Section of the Troughs.
نگ في ابرو
a view of the Troughs with the Roller, Rakes & with Two Sieves O. and P, which work upon different constructions to those at E .E. 1
O is obliquely pendant from the Lever B. C. and by the assistance of Coggs placed round its bottom, which work in others on the circum.
•hough, keep the Sieve in continual motion. P. is a like pendant with O but the Coggs thereof work in a Wheel in the cen
of the inner.
hough as at Q.
9. Is a plan of the inner.
à trough, wheel and sieves to Fig. 8.
are
9:10. A view of a plough and Harrow (to be used with or without the Rakes at B. Fig: 1 the plough for herning up the Slag, and the have
laying it smooth; they fastened to a pole (5) which is hooked to a -staple (R) that is drove in the Lever B. C. and have liberty to ric
according to the quantity of Slag in the trough; two or more of them may be used at discretion.
NB. The Slag is milled dry.