Improvements in Thrashing Machines.
Year: 1889

page_text: Date of Application, 2nd Mar., 1889
Complete Specification Left, 2nd Dec., 1889-Accepted, 4th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Thrashing Machines.
I JAMES MARSHALL of the Firm of Marshall Sons and Co. Limited of Britannia
Iron Works Gainsborough in the County of Lincoln Engineers do hereby declare
the nature of this Invention to be as follows:-
My Invention has for its object to provide thrashing machines with means whereby
when straw is passing through the machine in large quantities a better shaking of
the said straw is effected than is the case with thrashing machines as hitherto
constructed. This is effected according to my Invention by means of auxiliary
shaker boxes attached to or connected with preferably the top shoe in such a position
that they receive the straw after it leaves the ordinary shaker boxes and give it an
additional shaking.
I employ any suitable number of these auxiliary shaker boxes for instance say
that there are seven I make alternate ones have a backward and forward and an up
and down movement the others being stationary relatively to the shoe or having a
backward and forward movement only. 1 do not limit myself to precise details as
to the arrangement and means for imparting movement to the additional shaker boxes
but a convenient mode is to attach the alternate shaker boxes first named by securing
one end to a tube bar or rod mounted in brackets secured to the upper shoe and
its extension and securing such boxes at or towards the other end or at about their
mid portion, to a bar carried by spring hangers from a suitable part of the machine.
The other of the shaker boxes situated between those last above mentioned are secured
at one end to the said tube bar or rod and at the other end to the upper shoe
extension which extension is attached at one end to the usual upper shoe and at the
outer end is carried by a bar preferably suspended by spring hangers. T Thus as the
upper shoe operates, motion in a backward and forward direction is given to all the
auxiliary shaker boxes but every alternate one is, by the bar suspended by the spring
hangers as aforesaid, constrained to have also an up and down movement.
1000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Thrashing Machines.
I JAMES MARSHALL of the firm of Marshall Sons and Company Limited of
Britannia Iron Works Gainsborough in the County of Lincoln Engineer do
hereby declare the nature of this Invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
My Invention has for its object to provide thrashing machines with means whereby
when straw is passing through the machine in large quantities a better shaking of
the said straw is effected than is the case with thrashing machines as hitherto
constructed. This is effected according to my Invention by means of auxiliary shaker
boxes attached or connected preferably to the top shoe in such a position that they
receive the straw after it leaves the ordinary shaker boxes and give it additional
shaking.
And in order that my 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 aunexed Sheets of Drawings, the same letters of reference indicating
corresponding parts in all the figures,

page_text: Figure is a side elevation partly in section of that portion of the machine
illustrating my Invention.
Figure 2 is an end elevation, and
Figure 3 is a plan of the same:
According to my Invention, I provide. the upper shoe, Y, with a suitable number
of vibrating additional shaker boxes A. alternating with other shaker boxes F which
do not vibrate or move relatively to the upper shoe.-This shoe is also provided with
a shoe extension Y¹ which is attached to the upper shoe Y by rods or plates HL and is
suspended by hangers or bars G G³.
The vibrating shaker boxes A are hinged at their back ends on a tubular bar on
rod O fixed at each of its ends in a bracket Z bolted to the outside, of the shoe
extension Y.
These shaker boxes A are secured at about their mid-portion to a transverse bar D,
suspended by spring hangers or preferably by links E pivoted at their upper ends to
the frame of the machine and at their lower ends to the bar D to which the shaker
boxes A are attached.
The shaker boxes F which are situated between the vibrating shaker boxes A are
supported at their back ends on the tubular bar or rod C and at their forward ends to
the upper shoe extension Y.
It will be readily understood from the above description that the auxiliary shaker
boxes F are stationary relatively to the shoe or when the upper shoe operates have a
backwards and forwards motion only; while the alternate shaker boxes A being
pivoted at their inner or back ends on the bar C, carried by the shoe extension and
being supported towards their forward ends by the suspension links or hangers E
will have an up and down or vibrating motion in addition to the backwards and
forwards motion imparted to the shoe. The different positions that the shakers
occupy when in operation are shewn by dotted lines in Figure 1.-The shaker boxes
are kept in line by a bar B connected at each end to the bar C, by a block or
bearing X.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what
I claim is
First. A thrashing machine constructed with auxiliary shaker boxes which shake
the straw after it has been acted on by the ordinary shaker boxes and give it an
additional shaking for the purpose of separating grains which may have escaped the
action of the ordinary shakers substantially as hereinbefore described.
Second. In a thrashing machine a series of supplementary shaker boxes each
alternate box being supported at both ends on an extension of the upper shoe and the
other or intermediate boxes being hinged at one end to the said extension and
suspended towards the other end by spring hangers or suspension links connected to
the machine frame as and for the purpose substantially as hereinbefore described with
reference to the accompanying drawings.
Third. The arrangements and combinations. of parts constituting the improvements
in thrashing machines substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated this 2nd day of December 1889.
J. H. JOHNSON. & Co.,
Agents.