IMPROVE- MENTS IN BEATER BARS AND IN FIXING OR FORMING THE SAME INTO DRUM BEATERS FOR THRASHING MACHINES THE INVENTION BEING APPLICABLE FOR OTHER PURPOSES WHERE REVOLVING BARS ARE REQUIRED
Year: 1885

page_text: I, JOHN MILLINGton Casswell of 9 Albion Terrace, Northampton, Northampton-
shire Engineer, do hereby declare the nature of my said Invention for "IMPROVE-
MENTS IN BEATER BARS AND IN FIXING OR FORMING THE SAME INTO DRUM
BEATERS FOR THRASHING MACHINES THE INVENTION BEING APPLICABLE FOR
OTHER PURPOSES WHERE REVOLVING BARS ARE REQUIRED," and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement that is to say :-
My Invention relates to the beater bars and drum beaters of thrashing machines
but it is also applicable in some other cases where revolving bars are required and
it has principally for its object the improved and novel formation or construction
of the bars employed whereby the bars are rendered reversible and capable of being
more conveniently fixed together to form drum beaters whilst the bars may be
easily and expeditiously removed, reversed and replaced when required.
In carrying out the Invention the improved beater bars are formed preferably of
rolled steel, somewhat like the common double headed railway rail and have the
usual corrugations along the top and bottom or bearing sides as in the bars at present
in use.
The web of the improved beater bar is made taper that is slightly thicker
at one end than the other and the beater bars are formed into drum beaters in the
following manner. On a central shaft to which motion is given in the usual way
there are keyed two or more disc or other wheels or radial arms and these wheels
have parts cut out round the edges which form openings which correspond nearly
to the contour of half the section of the beater bar. When the beater bars are
passed through the openings in the wheels they lie therein with merely one head
on the outside of the periphery of the wheel and are held firmly in the nicks or
holes in the edges of the wheels being wedged therein by the taper shape of the web.
The beater bars may in addition to being wedged in be further secured by suitable
set screw bolts split keys or by spring bolts or otherwise there being only one such
fastener necessary to each bar. The forming of the bar with two faces so that when
one is worn the bar may be turned and the other surface substituted is a very great
advantage and it is obvious that the Invention and particularly the method of fixing
the bars together is applicable wherever revolving bars are required as for instance
in leather dressing machinery.

page_text: And in order that my said Invention and the manner of performing the same may
be properly understood I hereunto append a sheet of explanatory drawings to be
hereinafter referred to and representing my improved arrangements as applied to
drum beaters for thrashing machines. In these drawings the same reference numerals
are used to mark the same or like parts wherever they are repeated.
Figure 1 on the accompanying sheet of drawings, is a sectional end view of a drum
beater for a thrashing machine made according to my Invention, and Figure 2 is a
plan of part of the same only showing however two beater bars in position, whilst
Figure 3 is a longitudinal section taken through the web of the improved beater bar.
The shape of the beater bar 4 will be best seen on referring to Figure 1 the bar
being somewhat of the shape of a double headed or I rail commonly used on rail-
ways except that the bearing or top and bottom sides are formed with curves which
are non-concentric. These sides are so curved that one side of the head is thinner
than the other. These curved surfaces are formed with the corrugations usually
made in the beater bars at present in use. In forming a drum beater with my
improved beater bars, there are keyed upon a central shaft 5, two (or more) disc
wheels, 8, which have parts cut out round their edges. These cut away parts are in
the form of notches in the edges of the disc which correspond in size to the thickness
and vertical height of the web of the beater bar. These notches on the inside
become circular enlargements so that the notch and enlargement correspond nearly
to the section of the web and one head or side of the bar. The web of the bar is
made slightly taper as seen in Figure 3 this arrangement enabling the bars to be
inserted in the notches and enlargements and on being driven up the bars become
wedged in the notches. The bars may if desired be further secured by means of a
set screw 6 which is inserted at one end of the bar through the disc wheel as shown
in Figure 1. Another method of fastening the bars is also shown in Figure 1 and
consists of a sliding bolt 7 having a collar near its middle which is pressed upwards
by a spring so that on the bar being driven home the bolt rises into a recess in the
bar formed to receive it. The wedging action combined with the centrifugal force
however are sufficient in themselves to secure the bar and further fixing may be
dispensed with if desired. When a bar is in position on the disc wheels one side or
head of it projects beyond the periphery of the wheel and acts exactly in the same
way as the beater bars at present made with the greater advantage that the bars
may be removed, reversed and replaced when worn or damaged much more easily
and in a shorter time than is possible with the beater bars and drum beaters as at
present constructed.
Having now particularly described and ascertained the nature of my Baid
Invention and in what manner the same is to be performed. I declare that what
I claim is
(1) The forming of double headed beater bars for drum beaters of thrashing
machines or for other purposes, so as to be reversible substantially as herein before
described with reference to the drawings.
(2) The forming or fixing together of double headed beater bars (4) with disc or
other wheels or radial arms, to form drum beaters substantially in the improved
manner and for the purposes hereinbefore described with reference to the drawings.
(3) The forming the web of the improved beater bar with a taper form sub-
stantially as and for the purposes herein before described with reference to the
drawings.
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