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Nov. 19, 1946.
_,_ E mad,“
‘ Filed Kay 30; 1942
2 Sheets-Sheet 1
James E 6km’
~5170RNEKS I
Nov. 19, 1946‘
2,41 1,302
Filed nag so, 1942
2 Sheets-Sheet 2
.fames L’: 5161!
. Barium -
Patented Nov. 19, 1946 I
- 53
James E. Stine, Aidan, and George W. Borton,
Philadelphia, Pa., assignors to Pennsylvania‘
Crusher Company, Philadelphia, Pa., a corporation-of New York
7 Application May 30, 1942, SerialNoQ 445,116
1 Claim.
(01. 241-86)
This invention relates to crushers and particu
lglyciéo those fracturingi pieces of material by
The object of the invention is to combine- with a
thorough impact reduction a further reduction
by a group of several bars on an arc approach
ing the beater circle to give an additional break- '
down of the material. \- 1
Other objects of the invention, particularly in
the. path of the heaters and is impacted back
and forth between the heaters and the impact
blocks IS on the side of the machine toward
which the hammers are moving at the top. Then ,
the fractured pieces from these repeated impacts 7
"are driven against the bars 21 of the ‘unit 25,
these bars being smaller than the impact ‘blocks
15 and positioned on an are approaching the -'
beater circle so as further to break downand re
the construction and cooperation of the parts and 10 duce the larger fractured particles, The heaters
their combination with a ?nal impact plate at the
l2 and the bars 21 particularly cooperate to frac
discharge, will appear from the following descrip-_
ture to smaller size any oversized pieces delivered
tion taken in connection with the accompany
from the previous "impacts. The spaces 38 be
ing drawings, in which "
tween bars 21 are generously large for passing of
Fig. 1 is a vertical sectional view of a crushing 15 crushed material and preferably widen‘ out ra
apparatus embodying the invention;
dially so as to avoid any retention or jamming of
Fig. 2 is a horizontal sectional view taken on
material between the bars. These bars form a
' the line 2-2 of Fig. 1;
“wash board” effect which accomplishes the
Fig. 3 is a rear perspective view of the bar group
?nal reduction within a very short space, shorter
unit; and
20 than the space alloted to the initial fracturing by
Fig. 4 is a perspective view of the end of the
impact block side frame adapted for attach
Preferably the group of bars 21 is mounted on
ment of the bar group unit. In the crusher shown,
the impact block frame carrying the impact blocks
the casing 5, 6 is the usual construction lraving
15 so as to be adjusted therewith, but independ
a cover 1 formed at its center with a ?anged struc
ent adjustment of the'bar group unit 26 may be
ture 8 around the entrance opening 9 from the
provided. As indicated in Fig. 3, strengthening
hopper. The material passes at high velocity
downward through this opening 9 and radially
webs 40‘ may be provided at the central portion
of the group in the spaces 38. Bar group 21 (Fig.v
into the beater circle below.
3) may be perforate or imperforate with corru
The rotor comprises the usual shaft l0, disks 30 gations as desired.
II and stirrup heaters l2. Upper breaker blocks
In the bar group unit shown, the end portions
14 protect the cover and overlap with the main
:8 lie snugly within the extensions 25 oi.’ the im
breaker or impact blocks or anvils l5, four of
pact block frame pieces l1 andthe rear surfaces'
which are shown as mounted on each side in an
of these ends rest against the shoulders 41 of the
‘impact block frame l6v formed by end pieces 11
thickened end portions 42 of the frames, as shown
with the cross tie shafts l8. The middle tie
p The
2, 3 and 4. i
?nally discharged from
shaft 18 is linked at 19 to the pin 20 of an im—
pact block adjusting screw 2| adjusted by the
‘the breaker bars' I5, 21 is then projected against
hollow nut and hand wheel 22 journaled in the
the surface of the lower breaker block or “kick- '
40 off plate" 36 placed to intercept the material leav
bearing 23 of the casing offset 21. The lower portions of the impact block frame . ing the impact‘blocks at high speed. This “kick-v
11 are extended as indicated at 25 to provide an
off plate’f’36 protects the foundation from the
_ chorages for a cast unit 26 comprising a series of
impact of the discharged material and also utilizes
bars 21 joined together at their ends as indicated
the energy of the discharged particles to effect a
at 28, these end parts 28 being provided with fas- ' ' ?nal reducing action. This breaker block 36 may
tening lugs 29. having bolt holes 30 for the bolts
3| attaching the unit to the lower portions 25 of
the impact block frames 16. The bar shape 21 is
typical and may be altered to meet varying condi
Protective ba?le plates 33 are provided on each
side and a final central breaker block 36 of in
verted V formation is hung on the cross shaft
31. or held by other means.
be in sections for easy renewal of any one piece
as shown. When hung on the cross shaft 31, (or,
otherwise held) which in turn is anchored to the
casing or foundation, it is free to adjust itself to
‘ the pressure of the impacting material, or it may
be provided‘ with a simple locking lever on the '
outside of the machine clamped in different ad
Justments to regulate and maintain the desired
angularity of the plate.
The material entering at 9 moves squarely into 55 The machine shown is of the reversible type
generally symmetrical
a series of spaced rectangular impact members
on each side of a vertical
plane through the center so that the rotor may
extending in an are from said upper breaker sur
be reversed to distribute the wear on the oppo
site sides of the hammers and to "use the wear to
faces to the level of the axis of the heater and
having their relatively long ?at inner surfaces in
planes inclined forward at an acute angle with
the beater circle and adapted to cooperate with
sharpen the rear edges of the hammers which will
then act as ‘the front edges upon the next re-l
versal. The three stages of reduction are com
said beaters to fracture the material by impact
back and forth between ‘the heaters and said mem
bers, an impact block frame carrying said impact
pactly attained within 180° with an ample dis- ‘
charge opening between the bar group unit 26 and
the kick-0E plate 36. The impact fracture by 10 blocks and pivoted at its upper end and adjustable
the beaters and impact blocks l5 puts the mate
~ to vary the distance of the frame from the beater
rial into condition so that the next reduction is '
circle of the rotor around the pivot at said upper
attained within the several bars carried by the
end of the framefand a group of relatively small
unit 28 in much less space than that occupied by , - closely spaced bars following said impact blocks
the initial impact fracture stage. The result is 15 and mounted on said frame and having side sur
a very effective reduction of the oversize material
within a restricted space and with economy in
the overall expenditure for maintenance and
power, the material being broken into substan
tially properly sized pieces with a minimum de
velopment of ?nes.
We claim:
faces nearly radial to the axis of the beater circle
. and extending from said impact members in a
short are leaving a following ample discharging
opening of larger area than said entrance open
20 ing and terminating within 180° of the center of
In a crusher having a rotor carrying beat:
ers in a casing with an upper entrance ‘opening
and a discharge‘opening opposite and below said 25
entrance opening, the combination with upper
breaker'suriaces around the entrance opening, of
said entrance opening, so that there is extended
impact fracture followed bya relatively short
screen fracture ‘and said stages of reduction and
the discharge are compactly attained (within 180°.
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