Improvements in Rubbing Bars for Threshing Machines
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Rubbing Bars for Threshing Machines,
I, GEORGE SAUNDERS, of 71, Cathedral Square, Christchurch, in the Colony
of New Zealand, Mill Owner, do hereby declare the nature of my invention
to be as follows:-
:—
The rubbing bars attached to the concave of a threshing machine are much
subjected to wear and considerable expense is entailed in planing them up
from time to time in order to obtain a good edge against which the heads of the
grain are threshed by the beater drum.
Now according to my invention, 1 provide strips of steel, or other metal of
rectangular section having the necessary tenacity and hardness; and bolt them
to the side of the ordinary concave bars, in such manner that the upper edge
of each strip projects slightly above the bar of the concave to which it is attached.
The strips are fixed upon the front side of the bars so that they may do the
principal work of threshing, and are secured by bolts passing through them and
through the bars; the bolt holes being arranged that the strips may be reversed
and turned end for end so that, when one edge of a strip has been worn, another
edge may be brought into position to do the work until all four edges of the strip
are worn down.
By my invention the concave and the beater blades of the threshing drum can
be more readily maintained at the required distance apart to perform the work
successfully with the least expenditure of power.
Data sh 001
3000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in Rubbing Bars for Threshing Machines,
I, GEORGE SAUNDERS, of 71, Cathedral Square, Christchurch, in the Colony
of New Zealand, Mill Owner, 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:-
The rubbing bars attached to the concave of a threshing machine are much
subjected to wear and considerable expense is entailed in planing them up
from time to time in order to obtain a good edge against which the heads of
grain may be threshed by the beater drum.

page_text: Now according to my invention, I provide strips of steel, or other metal of
rectangular section having the necessary tenacity and hardness; and bolt them
to the side of the ordinary concave bars, in such manner that the upper edge
of each strip projects slightly above the bar of the concave to which it is attached.
The strips are fixed upon the front side of the bars so that they may do the
principal work of threshing and are secured by bolts passing through them and
through the bars; the bolt holes being arranged that the strips may be reversed
and turned end for end so that when one edge of a strip has been worn another
edge may be brought into position to do the work until all four edges of the strip
are worn down.
By my invention the concave and the beater blades of the threshing drum can
be more readily maintained at the required distance apart to perform the work
successfully with the least expenditure of power.
In the accompanying drawings:-
-
Fig. 1, is a side elevation of a concave the bars of which are fitted with my
attachment, and
Fig. 2, is a section of a bar with the attachment drawn to a larger scale.
The same letters indicate the same parts in both the figures.
The metal plates (a) are secured by bolts (6) to the sides of the concave bars (c).
The bolts are equidistant from each other and arranged so that the bars can be
taken off turned up side down or end for end and replaced the bolts fitting in the
same holes.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
The combination with the rubbing bar of the concave of a threshing machine
of a metal plate secured upon the side thereof substantially as and for the purposes
herein specified and illustrated.