Year: 1890

page_text: The said endless screw is formed of two portions, one having a narrow thread, and
the other having a wide thread, as clearly shewn in Figure 2, the narrow thread is
formed on an enlarged part of the serow shaft, while the wide thread is formed on
a reduced part of the shaft, the forward end of the serow shaft is slightly stronger
than the reduced portion, and mounted upon this end of the shaft is the sce
distributor E.
The narrow portion of the screw serves to convey the small seed, such as clover
seed, mustard seed, poppy seed and the like. When small seed of that kind is sown
the wide threaded portion of the screw is covered by the lid F, as shown in Figures 8
and 9. The screw is preferably made of bronze or of brass and its thread works
closely within the cylinder B.
The distributer E serves to equally distribute the seed; as it is fed forward from
the screw the distributer consists of a circular dise as shown in Figure 7 from
which steel pins i project the said pins being arranged in two concentric rows.
The pins of the inner tow project into the mouth of the cylinder B and provent the
seed from choking the mouth; the pins of the outer row distribute the seed. A
finger H projects from the cylinder B between the two rows of pins, the said finger
serving to clean the space between the two rows, if any of the larger seed grains
should have become entangled between the pins.
The cover or lid F, Figures 8 and 9, serves to cover the portion of the screw
having the wider threid, the said cover is firmly held in position partly by the right
hand side of the hopper, to which the cover is secured by a screw L, which also
serves to hold in place the spring tongues K, and partly by a shoulder M as shewn
in Figures 3 and 4 projecting from the side of the hopper and extending for the full
length of the narrow threaded part of the screw 0. On the samo side with the
shoulder M, an inclined surface N is provided, as shown in Figures 3 and 5, upon
which such grains as may be carried along by friction, will slide upward without
being crushed or damaged, and be delivered into the channel (), between which
channel and the inner spice of the hopper B the clustic tongno K, Figures 2 and 4,
form a trap, acting as a safety valve to prevent choking. If the seed should collect
under the feeding action of the screw C, the said springs will yield and allow the seed
to pass into the hopper, after which the springs automatically return into their normal
position to shut the passage. The said springs K are riveted to the shield P, which
serves as a guard to them.
To the lower end of the discharge tube D, Figure 6 a joint is connected to secure
the said tube to the share lever Q. The said lever Q at this portion, forms_n
collar R, which surrounds the upper, circular portion of the discharge opening T.
The lower end of the tube Denters with sufficient play into the collar and rests
against a heel U formed on the share. The lower end of the tube D is bent over
to form a flange V which is held secured within the collar R by a flat ring W
screwed to the collar R the joint thus provided for the tube D allows of sufficient
play for the said tubo to take an inclined position in every direction. The said
joint also keeps the wind off, and prevents jamming and injuries by sand and other
impurities.
The improved sowing machine as described, may also be employed for distributing
manure instead of seed.
The modifications illustrated in Figures 10 and 11 consist in arranging the
cylinder 13 in the lower part of the seed box A, tho feed scrow C being driven by a
gear wheel Croceiving motion by a corresponding gear wheel formed or secured to
one of the wheels of the machine.
The cylinder B has slots B' cut in its upper portion, through which the seed
enters into the cylinder and screw, and into the lower part of the said cylinder B,
pear shaped aportures 13 are cut or formed which are out of line with the upper
slots B. The sued falls out through the said apertures B', when carried to them by
the screw P.
The cylinder B carries a lever A' secured to its outside the said lever being provided
for the purpose of turning the cylinder moro or loss whereby the slots B' are partially

page_text: or completely shut by the wood of the box A. To the said box A a sheet metal
plate A is secured, which, on slightly turning the cylinder B by aid of the lever A¹,
will diminish or partly shut the apertures B² while on continuing to turn the cylinder B,
the said apertures B³ will be completely shut. By means of the suid lever A¹ great
facility and convenience is provided for adjusting the rate of discharge of the seed
the said lover A¹ is held in position as desired by a screw and adjusted along a
graduated scale A³ indicating the rate of discharge.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. In a seed drill machine, the combination with the seed box A of a cylinder or
cylinders B, arranged below the said box, an endless tapering screw working
within each of the said cylinders the said screw having upon one portion of its
length a narrow thread and upon the other portion a wider thread a seed distributer E
mounted upon the discharge end of the screw shaft, a shoulder M, inclined face N
and channol O with yielding tongues K and a removable cover F, all substantially as
described and for the purpose set forth.
2. In a seed drill machine, the combination with the seed box A, of a cylinder or
cylinders B, arranged below the said box an endless screw C with a narrow and a
wider thread upon portions of its length working within each cylinder a distributer E
mounted upon the discharge end of the screw shaft, a discharge tube D, into which
the seed (or manure) is conveyed, and a joint connecting the said tube D to the
share lever the said joint consisting of a collar R forming part of the said lever Q,
a bent over flunge V at the lower end of the tube D, resting upon a heel U of the
share, and a ring W secured to the collar R, to hold the tube in position with sufficient
play substantially as described and for the purpose set forth.
3. In a seed drill machine the combination with the seed box A of a cylinder or
cylinders B provided in the bottom of the said box, a cylindrical, ondless screw C
rotating within each of the said cylinders, slots B₁ formed in the upper portion of
the cylinder to allow the entrance of the seed adjustable slots B³ provided in the
lower portion of the cylinder for the discharge of the seed and a lever A' provided
for turning the cylinder B more or less, to adjust the width of the discharge openings B³,
by the plate A substantially as and for the purpose set forth.
Dated this 30th day of Anonst. 1890.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.