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Патент USA US2411171

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Nov. 19, 1946.
L_ ESMMONS
2,411,171
KERF CUTTING DEVIC E
Original Filed April? 20, 1943
_Z Hive/afar:
Q11
Patented Nov. 19, 1946
2,411,171
UNITED stares PATENT critic-E. ,
KERF CUTTING ‘DEVICE
Leon E, Simmons, Claremont, N. H., as'sign‘or to
Joy Manufacturing Company,‘a'corporation of
‘ Pennsylvania -
Original application April 20, 1943, Serial No.
483,748, Divided and this application Novem
ber 4, v1943, Serial No. 508,941
14-’Claims. (Cl. 74-251)
‘
p
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2
I
This ‘invention relates to kerf cutting devices
and‘more particularly toan improved chainblock,
‘strap link and hinge pin structure for a cutter
chain of a coal cutting (machine.
An object of the present invention is to provide '
which overlie the outer sides of the strap links
3, in the manner shown in Fig. 2, to hold vthe
strap links against lateral release in a manner to
be later explained.
The hinge pins 2 extend ‘
between the inner surfaces of guide strips 8
an improved’kerf cutting device. Another object
suitably ?xed to the outer plates '9 of the cutter
‘is toprovide an improved cutter chain for a coal
bar. In this illustrative construction, the hinge
cutting machine. A further object is to provide
pins are locked against rotation relative to the
an improved ‘chain block and strap ‘link structure
chain block ‘by locking keys ll! seated ‘in longi
for a cutter chain. A still further object is to pro 10 tudinal key slots or keyways ‘H 'and I2 formed
Vide 'an improved strap link ‘and hinge pin locking
respectively in the pins and block. The keyways
means. 'Still another object is to‘provide an im
l l extend along the exterior of ‘the hinge pins for
proved li‘i‘n‘ge pin structure .for a cutter chain,
the entire length of the pins, as clearly‘shown in
‘ having‘limproved meansfor locking the hinge pins
Fig. 6. The locking keys I0 are‘arrangedibetween
‘against rotation with'respect to the chain blocks. 15 and at their ends abut the inner'su‘rfaees' at P3
F‘A'nother object is to provide an improved ‘inter
of the strap links 3 ‘during the normal running
locking connection ‘between the strap links and
position of the cutter chain. When the strapllinks
chain block. These and other objects andad
3 are turned through substantially 90°, into‘the
vantages ‘of the invention will, however, herein
position shown in Fig. 4, slots [4 in the links, which
after more fully appear.
20 are normally out of registry with the key slots
This application is a division of my copending
l2 in the block I, are brought into‘registry with
application, ‘Serial No. 483,748, ?led April 20,
the key slots 12 so that the keys ll] may be driven
1943.
‘
In ‘the accompanying drawing ‘there is shown
out in an endwise direction, thereby to enable re
moval of the hinge pins 2. When the hinge pins
‘for purposes of illustration one form which the 25 are removed, the strap links 3 may be readily
moved out of their interlocking relation with the
In this drawing:
ledges 1 on the chain block I. or course, the
Fig. 1 is a side elevational View of ‘acutter chain
cutter chain must be moved out of the guideways
constructed in accordance with an illustrative
of the cuttenbar before removal of the pins and
‘embodiment of the invention, a portion of the
their keys. The chain blocks l have lateral lugs
- invention may assume in practice.
improved hinge pin structure being shown in
‘vertical section.
~
‘
‘Fig. 2 is a cross sectional view taken substan
tially ‘on line 2-2 of Fig. 1, looking toward the
frontend of the chain block ‘and showing a por
tionof the cutter bar.
‘
Fig. 3 is a horizontal sectional view taken sub
stantially on line 3-3 of Fig. 2, showing the key
held in pin-locking position by the strap links.
‘Fig. ‘4 is a fragmentary view in side ‘elevation
illustrating a'portion of the strap link and hinge
pinlock.
Fig. 5 is a detail sectional view taken sub
stantially on line 5-—5 of Fig. ‘4, showing the strap
links in a position to permit release-of the locking
‘key.
Fig. 6 is a perspective view o‘fone of the hinge
pins.
I5 which carry ‘cutter bits l6, and the cutter bits
are held in cutting position on the chain blocks
by holders [1 held in position by set screws 18, in
the manner fully described in my copending ap
plication, Serial No. 483,478 above referred to.
As a result of this invention an improved cut
ter chain is provided having an improved chain
block and strap link structure. The novel strap
link and hinge pin lock provides an effective
means for holding the hinge pins against rota
tion relative to the blocks, thereby concentrating
wear on the relatively inexpensive strap links.
Also the strap links are eiiectually interlocked
with the chain blocks. It will also be noted that
by the provision of the improved hinge pin con
1 struction embodying a relatively simple key and
slot arrangement, the hinge pin structure of-the
cutter chain’is greatly simpli?ed. Other advan
tages of the invention will be clearly apparent to
In ‘this illustrative embodiment of the inven
tion there is shown a-cutter- chain comprising a 50 those skilled in the art.
‘
‘chain block or link I connected by hinge pins 2 to
While there is in this application specifically
connecting or strap links 3. The strap links
‘described one form which the invention may as
“have ‘lateral gibs ‘4 received in "the guideways
sume in practice, it will be understood that this
~Sofa cutterbar 6,>as shown in Fig. 2. ‘ Thechain
form of the same is shown for purposes of illus
’ block ‘ms-man ‘ledges l at ‘its ‘opposite sides
tration and that ‘the vinvention maybe modi?ed
2,411,171
3
and embodied in various other forms without de
parting from its spirit or the scope of the append
ed claims.
What I claim as new and desire to secure by
ranged between the inner side surfaces of said
links during normal running of the chain.
'7. In a cutter chain, ‘a chain block, strap links
at the sides of said block, said block and links
Letters Patent is:
1. In a cutter chain, a chain block, a pair of
strap links arranged at the sides of said block,
said block and strap links having alined openings,
a hingepin arranged in said alined openings for .
pivotally connecting said strap links to the block,
a key seated in longitudinal key slots in said pin
and block for locking said hinge pin against rota
tion with respect to said block, said key arranged
4
having registering bores, hinge pins received in
said bores for pivotally connecting said links to
said block, and keys for locking the pins against
rotation with respect to said block, said keys ar
having registering bores, hinge pins received in
10 said bores for pivotally connecting said links to
between the inner surfaces/of said strap links.
2. In a cutter chain, a chain block, a pair of
strap links arranged at the sides of said block,
said block and strap links having alined openings,
a hinge pin arranged in said alined openings for
said block, and keys for locking the pins against
rotation with respect to said block, said keys ar
ranged between the inner side surfaces of said
links during normal running of the chain, and
said links being swingable relative to said block
into positions to permit release of said keys from
between said side strap link surfaces.
7
‘ 8. In a chain, a chain link, a pair of connect
ing chain elements arranged at the opposite sides
of said ‘chain link, a hinge element for pivotally
a key seated in longitudinal key slots in said pin 20 connecting said link and chain elements, a look
and block for locking said hinge pin against ro
ing member extending lengthwise of said hinge
tation with respect to said block, said key ar
element and. having interlocking engagement with
ranged between the inner surfaces of said strap
said hinge element and said chain link ‘so that
links, and said strap links having slots extending
said
hinge element is held against rotation rela
25
therethrough which are normally out of registry
tive to said chain link, said locking member being
with said key slots, and said strap links being
arranged and held in looking position between
swingable on the hinge pin into a position to bring
the
inner surfaces of said chain elements'with
said slots into registry with said key slots to per
its end surfaces in end abutting engagement with
mit endwise removal of the key.
said inner surfaces.
,
pivotally connecting said strap links to the block,
3. In a cutter chain, a chain block, a pair of 30
strap links arranged at the sides of said block,
said block and strap links having alined open~
9. In a chain, a chain link, a pair of connect
ing chain elements arranged at the opposite sides
of said chain link, a hinge element forpivotally
ings, a hinge pin arranged in said alined open
connecting said link and chain elements, a lock
ings for pivotally connecting said strap links to
ing member extending lengthwise of said hinge
35
the block, a key seated in longitudinal key slots
element and having interlocking engageméntwith
in said pin and block for locking said hinge pin
said hinge element and said chain linkjso that
against rotation with respect to said block, said
'said hinge element is held against rotation rela
key arranged between the inner surfaces of "said
tive to said chain link, said locking member be
strap links, and ledges on said block overlying the
ing arranged and held in locking position'be
outer sides of said strap links to hold said links 40 tween the inner surfaces of said chain elements,
against lateral displacement from the block.
one of said connecting elements being recessed
4. In a cutter chain, a chain block, a pair of
near its pivot and swingable without‘ translatoi'y
strap links arranged at the sides of said block,
movement on said hinge element relative to‘ said
said block and strap links having alined openings, — link into a position to bring solely by such swing
a hinge pin arranged in said alined openings for
ing movement the recess into alinement with said
pivotally connecting said strap links to the block,
locking member to permit endwise removal of
a' key seated in longitudinal key slots in said pin
said locking member from said hinge element;
‘and block for locking said hinge pin against ro
10. In a chain, a chain link, oonnecting'links
tation with respect to said blocks, said key ar
at the sides of said chain link, hingefelements
ranged between the inner surfaces of said strap .
for pivotally connecting said links together, and
links, said strap links having slots extending
ledgelike portions projecting from the sides of
therethrough which are normally out of registry
said chain link and engaging the outer side sur
with said key slots, said strap links being swing
faces of said connecting links for retainingthe
able on the hinge pin into a position to bring said
latter against lateral separation from said. chain
slots into registry with said key slots to permit
‘endwise removal of the key, and ledges on said
‘block overlying the outer sides of said strap links
‘to hold said links against lateral displacement
from the block, said links upon removal of said
hinge pin being releasable from said block ledges.
5. In a cutter chain, a chain block, connecting
link, said connecting links being movable bodily
without pivoting out of engagement with said
ledgelike portions upon removal of said_ hing
elements from said links.
a .
.7
,
11. In a chain, cooperating chain elements one
of which is a connecting element, a hinge ele
ment for pivotally connecting said chain elements
'links at the sides of said block, releasable hinge
together, and a key interlocked with said hinge
elements for pivotally connecting said block and‘
element and the other chain element for locking
links, said block having ledgelike portions pro
jecting from the sides thereof and engaging the ~ said hinge element against rotation with respect
tosaid other chain element, said key being‘ held
outer side surfaces of said links for retaining the
against longitudinal displacement in one direc
latter against lateral release from said hinge ele
tion from its locking'position by engagement of
ments and said block in all positions of said links
its end surface with the inner surface-of said
about their pivots, said links upon release of said
hinge elements being movable bodily in a direc
tion at right angles to the axes of said hinge ele
ments out of engagement with said ledgelike por
tions.
.
s
,3‘
6. In a cutter chain, a chain block, ‘strap links
connecting chain element.
12. In a chain, cooperatin'gichain element'sone
of which is a connecting element, a hinge.‘ element
for pivotally connecting said chain; elements to
gether, a key interlocked with‘ saidhingeelement
.at the sides of said block, said‘ block and links 75 and the other chain element for ‘jlockinlgifasaid
5
72,411,171
hinge element against rotation with respect to
said other chain' element, said key being held
against longitudinal displacement in one direc
tion from its locking position by the inner sur
face of said connecting chain element, and said
connecting chain element vbeing recessed near its
pivot With the recess normally out of alinement
with said key, and said connecting chain ele
ment being swingable Without translatory move
ment on said hinge element relative to said other
chain element into a position to bring solely by
such swinging movement the recess into aline
ment with said key to permit endwise removal
of the key.
'
“6
chain element, said connecting chain element be
ing releasable from said ledgelike portion upon
removal of said hinge element.
14. In a chain, cooperating chain elements one
of which is a connecting chain element, a hinge
element for pivotally connecting said elements
together, a key having interlocking engagement
‘with said hinge element and the other chain ele
ment for locking said hinge element against ro
tation with respect to said other chain element,
said key being held against longitudinal displace
ment in one direction from its locking position
by the inner surface of said connecting chain ele
ment, said connecting chain element having a
recess near its pivot which is normally out of
alinement with said key, and said connecting ele
ment being swingable on said hinge element rela
tive to said other chain element into a position
13. In a chain, cooperating chain elements one
of which is a connecting element, a hinge ele
ment for pivotally connecting said chain ele
ments together, a key having interlocking engage
ment with said hinge element and the other chain
to bring the recess into alinement with said key '
element for locking said hinge element against 20 to permit endwise removal of the key, and a
rotation with respect to said other chain ele
ledgelike portion on said other chain element
ment, said key being held against longitudinal
overlying the outer side of said connecting chain
displacement in one direction from its locking
element to hold the latter against lateral dis
position by the inner surface of said connecting
placement from said other chain element, said
chain element, and a ledgelike portion on said 25 connecting chain element upon removal of said
other chain element overlying the outer side of
said connecting chain element to hold the latter
against lateral displacement from said other
hinge element being releasable from said ledge
like portion.
LEON E. ‘SIMMONS.
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