1818.

Evans

Eaton.

dence, that an agent for the plaintiff, wrote a note to the defendent in answer to which, he called on the

7. The form of the gudgeons of the shaft of the upper pul ley.

12. The form of the buckle for tightening the elevator strap. Fig. 17. plate vii, represents an elevator applied to raise grain into a granary, from a wharf, &c. by a horse.

16, represents an elevator raising the meal in a grist-mill. !8, represents an elevator wrouglít by a man.

Plate viii, 35, 39, represents an elevator raising grain from the hold of a ship.

33, 34, represents an elevator raising meal from three pair of stones, in a flour mill, with all the improvements complete. Plate ix, Fig. 1. CD represents an elevator raising grain from a waggon. E. represents the moveable spout, and manner of fixing it, as to direct the grain into the different apart

ments.

Plate x. 2, 3, and 11, 12, represents elevators, applied to raise rice in a mill for bulling and cleaning rice.

The straps of elevators are best made of white harness leather.

No. II. THE CONVEYOR.

Plate vi. fig. 3, represents a conveyor for conveying meal from the millstones into the elevator, stirring it to cool at the same operation, showing how the flights are set across the spiral line to change from the principle of an endless screw to that of a number of ploughs, which answer better for the purpose of moving meal, showing also the hting flights set broadside foremost, and the manner of connecting it to the lower pulley of the elevator which turns it.

Fig, 4. The gudgeon of the lower pulley of the elevator connected to the socket of the convevor.

5. An end view of the socket and the band which fastens t to the conveyor

agent at Chambersburg, at the house of Jacob Snyder, on the ninth of August, 1813; there were a num

Plate viii. 37, 36.-4 represents a conveyor for conveying grain from the ship to une elevator 4-5, with a joint at 36, to let it rise and lower with the tide.

44-45. A conveyor for conveying grain to different garners from an elevator.

31-32. A convevor for conveying tail flour to the meal elevator, or the coarse flour to the eye of the stone.

Plate ix, Fig. 11, represents a conveyor for conveying the meal from two pair of stones, to the elevator connected to the pulley, which turns them both.

Plate x. 2-11, represents conveyors applied to convey rice, an a rice mill, from a boat or waggon to the elevator, or frem the fan to an elevator.

No. III. THE HOPPERBOY.

Plate vii. Fig. 12, represents a happerboy complete for performing all the operations specified, except that only one arm is shown.

AB, the upright shaft; CED, the arms, with flights and sweeps.

E, the sweeper to fill the bolting hoppers HH.

CFE, the brace, or stay, for steadying the arms.

P, the pulley, and W, the weight, that is to balance the arms, to make them play lightly on the meal, and rise or fall, as the quantity increases or diminishes.

ML, the leader. N, the bitch stick, which can be moted along the leading line, to shorten or lengthen it.

Fig. 13. SSS, the arms turned bottom up, showing the flights and sweepers complete at one end, and the lines on the other end show the mode for laying out for the flights, so as to have the right inclination and distance, according to the circle described by each, and so that the flights of one end may track between those of the other. The sweepers and the flights at each end of the arms are put on with a thumb screw, so that they may be moved, and so that these flights may be reversed,

1818.

Evans

Eaton.

1818.

Evana

Eaton.

ber of millers present; the defendant then told the agent that he had got Mr. Erans' Book, a plate in

to drive meal outwards from the centre, and at the same time trail it round the whole circle: this is of use sometimes, when we wish to bolt one quantity which we have under the hopperboy, without bolting that which we are grinding, and yet to spread that which we are grinding to dry and cool, laying round the hopperboy, convenient to be shovelled under it, as soon as wo wish to bolt it.

Fig. 15. The form of the pivot for the bottom of the upright shaft.

14. The plate put on the bottom of the shaft to rest on the shoulder of the pivot; this plate is to prevent the arm from descending so low as to touch the floor.

Plate viii. Fig 25, represents a hopperboy attending two bolts in a mill, with all the improvements complete.

Plate ix. The hopperboy is shown over QQ. Fig. 4 is the arm turned upside down, to show the flights an sweepers.

No. IV. THE DRILL.

Plate vi. Fig. 1. HG represents a drill conveying grain from the different garners to the elevator, in a mill for grinding par cels for toll or pay.

Plate vii. Fig. 16. Bd a drill, conveying meal from the stones in a grist mill to the elevator.

The strap of this machine may be made broad, and the substance to be moved may be dropped on its upper surface, to be carried and dropped over the pulley at the other end: in this case it requires one bucket like those of the elevator, to bring up any that may pill off the strap.

For full and complete directions for proportioning all the parts, constructing, and using the above-described machines, see the book which I have published for that express purpose, entitled, "The Young Millwright and Miller's Guide." See plate viii. representing a mill, with three pair of millstones, with all the improvements complete, except the kiln-drier.

the Millwright's Guide, and if the agent would take forty dollars, the defendant would give it him; the

No. V,-THE KILN-DRIER.

Plate ix. Fig. 2. A., the stove, which. may be constructed simply of six plates, and enclosed by a brick wall lined with a mortar composed of pulverised charcoal and clay. B., the pipe for carrying off the sinoke. CC., the air-pipes, connecting the space between the stove and wall with the conveyor. DD., the pipes for the heated air to escape.

The air is admitted at the air hole below, regulated by a register as experience shall teach to be best, so as not to destroy the principle which causes the flour to ferment easily, and rise in the process of baking. The conveyors must be covered close, the meal adınitted by small holes as it falls from the mill-stones.

Witness, Jo. Gales, junr.
Saml. H. Smith,

OLIVER EVANS."

b THE UNITED STATES OF AMERICA;

To all whom these letters Patent shall come :

Whereas Oliver Evans-of the city of Philadelphia, a cit zen of the United States, hath alleged that he hath invented a new and useful improvement in the art of manufacturing flour and meal, by means of certain machines, which he terms an improved elevator, an improved conveyor, an improved hopper-boy, an improved drill, and an improved kiln-drier; which machines are moved by the same power that moves the mill or other principal machinery, and in their operation subdivide any granulated or pulverised substance, elevate and carry the same from place to place in small and separate parcels, spread, stir, turn and gather them by regular and constant motion, so as to subject them to artificial heat, and the air to dry and cool when necessary; a more particular and full description

1810.

Evans

V.

Eaton.

defendant said that his hopper-boy was taken from a
plate in Mr. Evan's book; he said he would give no.
more, alleging, that the hundred dollars the agent
asked was too much; that the stream on which his
mill was, was a small head of Conogocheage. The
agent then declared, that if the defendant would not
pay him by Monday morning, he would commence a
suit in the circuit court.

The plaintiff further gave in evidence, that another
agent for the plaintiff was in the defendant's mill on
the second of November, 1814, and saw a hopper-boy
there, on the principles and construction of the plain
tiff's hopper-boy. This witness had heard that a
in the words of the inventor is hereby annexed in a schedule:
which improvement has not been known or used before his
application has affirmed that he does verily believe that be
is the true inventor or discoverer of the said improvement, and
agreeably to the act of congress entitled, "An act for the re-
lief of Oliver Evans," which authorizes the Secretary of State
to secure to him by patent the exclusive right to the use of
such improvement in the art of manufacturing flour and meal,
and in the several machines which he has discovered, improv-
ed and applied to that purpose; he has paid into the treasury
of the United States, the sum of thirty dollars, delivered a re
ceipt for the same, and presented a petition to the Secretary
of State, signifying a desire of obtaining an exclusive property
in the said improvement, and praying that a patent may be
granted for that purpose: These are therefore to grant, ac-
cording to law, to the said Oliver Evans his heirs, adminis
trators, or assigns, for the term of fourteen years, from the
twenty-second day of January, 1808, the full and exclusive
right and liberty of making, using, and vending to others to