IMPROVEMENTS IN THRASHING MACHINES
Year: 1882

page_text: LETTERS PATENT to John Henry Johnson of 47 Lincoln's Inn Fields in the
"
County of Middlesex Gentleman for an invention of "IMPROVEMENTS IN
THRASHING MACHINES A communication to him from abroad by the firm of
M. Epple of Munich in the Kingdom of Bavaria and Empire of Germany
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at
the Office of the Commissioners of Patents on the 30th May 1882.
"
JOHN HENRY JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman " IMPROVEMENTS IN THRASHING MACHINES a communication to me
from abroad by the firm of M. Epple of Munich in the Kingdom of Bavaria and
Empire of Germany
The object of this Invention is to provide means for working the vibrating parts
of thrashing machines so that the first cleaning arrangements are operated by a
single shaft in such a manner that the energies of the vibrations and oscillations
compensate or balance each other whereby motion may be directly transmitted by
the one shaft to the several vibrating parts without the employment of connecting
links.
In carrying the said Invention into effect one shaft is provided passing beneath
the centre part of the straw shakers or shaker boxes the said shaft having a crank
beneath each shaker engaging, with lugs or blocks thereon.
I will presume that the machine is provided with three straw shakers and with
an upper shoe or guide board and a lower shoe or sieve box. The cranks are so
set that the outer straw shakers are moved in one direction and the middle straw
shaker in the other direction as the shaft revolves. The outer straw shakers are
connected by spring strips with the one end of the guide board or upper shoe.the
said spring strips being fastened to or connected with the crank blocks of the straw
shakers. A similar spring strip connects the middle straw shaker to the sieve box
or lower shoe, the attachment being formed at the end of this lower sieve box or

page_text: shoe opposite to that at which the strips are connected to the upper shoe or
shaker. The outer shaker boxes are connected at the end to which the spring
trips are attached to a cross bar carried by spring hangers and the middle shaker
box has at its end to which the spring strip is applied a similar connection with
another cross-bar carried by other spring hangers. The ends of the shaker boxes 6
opposite their respective cross-bars are without support. The shoes are supported
by spring hangers. The central position of the cranked shaft admits of its
carrying a pulley for working the elevator thus dispensing with a special shaft for
this purpose.
By the foregoing construction and arrangement of the parts of thrashing 1
machines the one shaft gives motion to all the vibrating parts and the construction
of the machines is in consequence much simplified and lessened in cost.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Henry Johnson in the Great Seal Patent Office on the
28th November 1882.
JOHN HENRY JOHNSON of 47 Lincoln's Inn Fields in the County of Middlesex
Gentleman "İMPROVEMENTS IN THRASHING MACHINES' a communication to
me from abroad by the firm of M. Epple of Munich in the Kingdom of Bavaria
and Empire of Germany.
The object of this Invention is to provide means for working the vibrating parts
of thrashing machines so that the first cleaning arrangements are operated by a
single shaft in such a manner that the energies of the vibrations and oscillations
compensate or balance each other whereby motion may be directly transmitted by
the one shaft to the several vibrating parts without the employment of connecting
links and with a diminished number of bearings.
And in order that the said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
I will describe the Invention as applied to a machine having three strakers from
which its general application will be readily understood. Figure 1 is a vertical
section and Figure 2 is a sectional plan of a machine provided with the
improvements.
One shaft, A is provided passing beneath the centre part of the steam shakers
or shaker boxes B1 B2 B3 the said shaft having cranks a' a² as one beneath
each shaker engaging with lugs or blocks thereon. The upper shoe or guide
board C and a lower shoe or sieve box D are connected regidly together. The
cranks a¹ a³ a³ are so set that the outer straw shakers B' B³ are moved in one
direction and the middle straw shaker B2 is moved in the other direction. The
middle straw shaker B2 is connected by a sprink strip E with the one end of the
guide board or upper shoe C the said spring strip being fastened to or connected at
one end with the crank block of the straw shaker B2 and at the other end to the
said guide board C. The outer shaker boxes B' B³ are connected at one end to a
cross bar F carried by spring hangers f and the middle shaker box has at its end
opposite to that at which the cross bar F is situated a similar connection with
another cross bar F2 carried by other spring hangers f². The ends of the shaker
boxes opposite their respective cross bars F and I are without support. The
parts C and D are supported by spring hangers g. The central position of
the cranked shaft admits of its carrying a pulley for working the elvator this
dispensing with a special shaft for this purpose.
"
By the foregoing construction and arrangement of the parts of thrashing
machines the one shaft gives motion to all the vibrating parts in such a manner
that the movements of the various parts counterbalance or compensate each other
and the construction of the machines is in consequence much simplified and lessened
in cost In order to make the force of the oscillations of the shaker boxes B and B³
balance that of the oscillations of the box B3 and the parts C and D some weights
must be put on the ends of the boxes B' and B³ because the parts B³ C and D are
heavier than the parts B¹ and B³.
Having now described and particularly ascertained the nature of the said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original

page_text: and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is :-
:-
The improvements in thrashing machines consisting in arranging and connecting
the various parts as and for the purpose herein before described with reference to
the accompanying drawing.
In witness whereof I the said John Henry Johnson have to this my
Specification set my hand and seal this twenty eighth day of November
One thousand eight hundred and eighty two.