Improvements in Thrashing Machines.
Year: 1896

page_text: Date of Application, 19th Dec., 1896
Complete Specification Left, 20th Sept, 1897- Accepted, 6th Nov., 1897
PROVISIONAL SPECIFICATION.
Improvements in Thrashing Machines.
We, JAMES HORNSBY, Director of Richard Hornsby & Sons, Limited, JOSEPH HENRY
SAMS, Manager, and ROBERT EDWARDS, Engineer, of the said Company, all of
Spittlegate Iron Works, Grantham, in the County of Lincoln, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to thrashing machines, and has for its object to improve the
construction of the same.
According to our invention in order to adjust the concave which partly surrounds
the thrashing drum we use adjusting screws, such as are now used, but instead of
moving the screws at each side by turning their nuta independently we arrange them
to be inoved simultaneously.
For this purpose we make the outside or rim of each nut in the form of a worm
wheel, and on a shaft or spindle extending through from one side of the thrasher to
the other we fix worm gearing with the worm wheel nuts so that by turning the worm
spindle both the worm wheel nuts are thereby turned and the adjusting screws on both
sides moved as required.
In order to vary the width of the openings between the cross laths that cover
the tops of the shakers we use a second set of cross laths held by two separate side
frames, and arranged so that they can be moved lengthways of the shaker, so as to
more or less cover the openings between the lower laths. We use by preference a
screw to effect this, the side frames with the top laths attached being carried in
suitable guides.
1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Thrashing Machines.
We, JAMES HORNSBY, JOSEPH HENRY SAMS, and ROBERT EDWARDS, all of Spittlegate
Iron Works, Grantham, in the County of Lincoln, Engineers, 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 :-
Our invention relates to thrashing machines, and has for its object to improve the
construction of the same.
According to our invention in order to adjust the concave which partly surrounds
the thrashing drum we use adjusting screws, such as are now used, but instead of
moving the screws at each side by turning their nuts independently we arrange them
to be moved simultaneously.

page_text: For this purpose we make the outside or rim of each nut in the form of a worm
wheel, and on a shaft or spindle extending through from one side of the thrasher to
the other we fix worms gearing with the worm wheel nuts so that by turning the worm
spindle both the worm wheel nuts are thereby turned and the adjusting screws on both
sides moved as required.
In order to vary the width of the openings between the cross laths that cover
the tops of the shakers we use a second set of cross laths arranged so that they can be
moved lengthways of the shaker, so as to more or less cover the openings between the
lower laths. We use by preference a screw to effect this.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawings, in which :-
Figure 1 is a sectional side elevation; and
Figure 2 a sectional plan illustrating our improved means for adjusting the
concave:
Figure 3 is a longitudinal section; and,
Figure 4 is a sectional plan shewing the adjustment of the shakers.
In Figures 1 and 2 a is the concave having three sets of adjusting screws,
b, b, c, c and d, d arranged in pairs on opposite sides thereof. These adjusting screws
which slide in brackets e, e carry nuts f, f formed externally as worm wheels, and
held in the brackets e, e so as to prevent their longitudinal movement relatively with
the screws. In connection with each pair of nuts is mounted a spindle y carrying
worins h, h engaging with the said nuts so that by turning the worm spindle the
nuts are turned and the adjusting screws moved in or out as required to adjust
the concave.
In order to alter the width of the spaces between the cross laths of the shakers we
make each shaker in two pieces, and we divide the cross laths and attach the two
parts to the upper and lower parts of the shakers.
In Figures 3 and 4 i indicates the top part of the shaker having the upper
parts i¹,
of the laths fixed to it and k the lower part of the shaker having the lower
parts k, k of the cross laths fixed to it. The upper part i of the shaker is made to
slide endways on the bottom part so that the laths on it, when the top part is
moved, more or less close the spaces between the laths of the lower part k. A screw
is sometimes arranged at one end of the shaker as shewn to effect the endwise
movement, but, if desired, the screw can be dispensed with and the top part moved by
hand. Screws or bolts on the adjustable upper part i and entering slotted holes in the
bottom part serve for locking the two parts together after adjustment; any other
suitable means can, however, be used to effect this.
Having now particularly described and ascertained the nature of our said
invention. and in what manner the same is to be performed, we declare that what we
claim is
1. In a thrashing machine the combination with the pairs of screws for adjusting
the concave which surrounds the drum, of nuts which are formed externally as worm
wheels and worms mounted on spindles and engaging with the said nuts so that the
nuts of each pair can be turned simultaneously, substantially as described.
2. In a thrashing machine, shakers formed in two parts or pieces, both parts having
cross laths attached to them, and moving endwise one on the other, so that the cross
laths in the upper part can more or less cover up the spaces between the cross laths
on the lower part, substantially as described.
Dated this 20th day of September 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.