Year: 1888

page_text: We, JOHN ARTHUR YEADON, of 4 Albion Place, and ROBERT MIDDLETON, of
Sheepscar Foundry, both of Leeds, in the County of York, and both engineers, do
hereby declare the nature of this invention to be as follows:-
It relates to an improved manner of inserting and securing the bars in the cages
which in revolving break up the material operated on; whether such bars be hard
or soft.
The objects of our invention are (1) to simplify the first manufacture of these
cages, (2) to render the replacement, say, even of a single bar at a time, easy,
expeditious, and economical, and (3) to allow a further economy to be effected by
permitting bars to be inserted of a hardness and brittleness such as would not stand
the riveting now applied to soft bars ;-these harder bars necessarily lasting a longer
time without wearing through.
Our bar has, by preference, the usual shaped head, and is circular, at any
rate near such head, where it passes through the near side of its cage ;-the further
end of the bar is likewise circular where it has to go through the further side, or
ring, of its cage; and this latter end is screwed with a thread which corresponds
with the tapped hole provided for the reception of each bar in the last mentioned
cage-side or ring. We prefer to make the bar no smaller in diameter where it is
screwed as no shoulder is required. The threads should tightly fit so as to be firm
in each case.
The hole in the near side of the cage must be large enough to pass the bar
through and it should be well fitted to the correct diam. of the head-end of the bar,
so that all may be firm in each individual case.
By preference we screw each bar up to the same length measuring from the bead
so that when a set of bars are screwed home the cage sides are held in their correct
positions respectively. The bars are left long enough to fully go through the screwed
sides or rings.
After a bar is inserted and screwed home in the far side a bolt is inserted in the
usual way through the shaped head & through the near side of the cage and these

page_text: two parts are drawn tightly together, after which the bolt head may be riveted over
to prevent its nut moving & in any way releasing the bar.
If found desirable, the head of the bar may be approximately annular & of such a
diameter as to permit two or more holes for the insertion of these small bolts to be
made in different positions so as to give more choice for the final position. Only one
hole would be made in the cage side for the small bolt. Other means could be
devised for this object which is to avoid having to turn the screw through an entire
revolution.
As no rivetting of a bar is resorted to any one bar may at any time be removed and
a new bar substituted in its place without in any degree disturbing any of the other
bars, or damaging any of the fitting-excepting only the small locking-bolt which
may have to be replaced.
By this improvement a steel bar may be prepared for its place whilst soft and after
being hardened it may be inserted in its hardened state, thereby securing a longer
life for the bar.

page_text: We, JOHN ARTHUR YEADON, of 4 Albion Place, and ROBERT MIDDLETON, of
Sheepscar Foundry, both of Leeds, in the county of York, and both Engineers, do
hereby declare the nature of this invention and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement :-
It relates to an improved manner of inserting and securing the bars in the cages
which in revolving break np the material operated on; whether such bars be hard
or soft.
The objects of our invention are (1) to simplify the first manufacture of these cages;
(2) to render the replacement, say, even of a single bar at a time, easy, expeditious,
and economical; and (3) to allow a further economy to be effected by permitting bars
to be inserted of a hardness such as would not stand the rivetting over now applied
to soft bars-these harder bars necessarily lasting a longer time without wearing
through.
Our bar has, by preference, the usual L shaped head and is circular, at any
rate near such head where it passes thro' the side of the cage :-the further end of the
bar is likewise circular where it has to go thro' the opposite side of the cage; and
this latter end is screwed with a thread which corresponds with the tapped hole
provided for its reception in the ring or cage-side.
We prefer to make the bar no smaller in diameter where it is screwed as no
shoulder is requisite. The threads of the screw should fit tightly in every case so
as to hold all firm.
The hole in the cage or ring which takes the head-end of the bar must be large
enough to allow the bar to pass thro' to the other side; this hole should be of the
correct size so that each bar may be firmly held therein.
By preference we screw each bar up to the same length, measuring from the head,
so that when a set of bars are screwed home the cage sides or rings are held in
their correct parallel positions. The bars are left long enough to go fully thro' the
screwed cage sides or rings.
After a bar is inserted and screwed home in the far side a bolt is inserted in the
usual way thro' the shaped head and the adjoining side of the ring or cage, and
these parts are drawn tightly together; after which the bolt head may be rivitted
over to prevent its nut moving and in any way releasing the bar.
The thread on the bar should be of a fine pitch in order the better to allow tho
L shaped head to be brought round into a bolting position.
As no rivetting of a bar is resorted to it follows that any one bar may at any
time be removed and a new one substituted without in any way disturbing any of
the other bars, or damaging any of the fittings-excepting only the small locking
bolt which may have to be replaced.

page_text: By this improvement a steel bar may be prepared for its place whilst soft (the
L shaped head being filed-as may be required-to bring it round to its proper
place) after which it may be hardened and inserted, thereby securing a longer life
for the bar.
On the annexed drawing Fig. 1 is a longitudinal view of a round bar; fig. 2 is
the end view. Fig. 3, shows that the bar may take any shape in the middle, so long
as it can pass thro' the circular hole at the head-end. Fig. 4, shows the positions
and arrangements of the screwed-ends which leave the shaped heads to the outside,
so that when the coverings are removed (as they are in the figure) a workman may
remove any bar without disturbing the others. E, E, shows the central axis, the
drawing being in section.
The same letters refer to the same parts in all the figures.
A is the bar; A¹ being the screwed end; and A2 the head-end which tightly fits
thro' the cage or ring at B. The screwed holes are thro' the sides C. The fixing
bolt is shown at D.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
The improved mode of inserting and securing bars in Disintegrator cages (and
arranging their heads in proper position) whereby any one bar (or more) may be
readily and easily replaced without in any way interfering with the other bars and
without taking the other pieces (bolts D excepted) from together, with the objects
and for the purposes set forth.
Dated this 22nd day of December 1888