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Патент USA US3075667

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Jan- 29, 1963
E. J. GREENAWALT
3,075,650
RAILWAY COUPLER
Filed 001;. 15, 1957
.ig/
2 Sheets-Sheet 1
Jan. 29, 1963
E. J. GREENAWALT
3,075,650
RAILWAY COUPLER
Filed 001;. 15,. 1957
2 Sheets-Sheet 2
W5
INVENTOR.
waist
Patented Jan. 29, 1963
'2
3,075,650
I
omitted from various views, where said details are be
lieved to the shown adequately in other views.
_
5; WAY ‘COUPLER
Elmer J. Greenawalt, Ailiance,~(ihio, assignor to Amsted
‘Industries ‘Incorporated, Chicago, 11]., a corporation of
New Jersey
Filed Get. 15, 1957, Ser. No. 699,303
3 Claims. (Q1. 213-133)
Referring ‘now rto'the drawings ‘for a more detailed de
scription of the coupler mechanism and referring more
particularly ‘to FIGURE 1, there is shown a coupler10
having a head 12 and a portion of a coupler shank 14.
The coupler head =12comprises a guard arm 16. A cavity
‘17 ‘is disposed internally of the coupler 10. Located
.My invention relates to a railway coupler and more
therein is a rotor 18 which is rotatable in a horizontal
particularly to an improvement of a coupler lock operat 10 bearing surface or hole 20 which ‘extendsfro'm the operat
ing mechanism.
Couplers are subjected to severe shocks when used as
service equipment for certain types ‘of jobs.
Severe
shocks may occur at the 'time when a coupler is mated
ing rod 'side to the guard arm side of coupler >10, the'hole
20 ‘being "disposed adjacent ‘the ‘upper and rear end of
cavity 17.
.
The ‘rotor 18 (‘FIGURES 2, ZA-a‘nd 5) comprises an
to another coupler or at the time of shunting of railway 15 operating rod ‘engaging eye 22 disposed at an end of the
cars. As the coupler comprises a lock operating mecha
rotor 18. vRotor ?18 also comprises lugs 24 and 26 dis
nism, this lock operating mechanism is subject to those
same severe shocks occurring to the coupler. A de?nite
posed adjacent operating rod engaging ‘eye 22 wherein
lugs .24 and .26 extend in opposite directions. The lugs
result of these shocks might be damage to the parts of
the lock operating mechanism. Accidental disassembly
of the related parts might occur. Another result of these
severe shocks might be accidental displacement of the
operating rod (not shown) wherein ‘the operating rod
and 26 are 'albuttably engageable with a conventional
may \be rotatably'connected to rotor 18 through eye 22.
The l'ugs24 and 26 transmit the rotational torque of the
locking mechanism which would place the locking mecha
operating rod (not shown) to the rotor 18. ‘Operating
nism in an unlocked position.
rod engaging "eye 22 is provided with its axis extending
My invention comprehends means whereby the un 25 substantially perpendicularly ‘to the rotational axis of
desired results which might occur due to severe shocks
rotor 18. ‘Eye 22 is offset forwardly of the rotational
may be prevented. My novel invention comprises novel
axis of rotor 18 as shown in ‘FIGURES 1 and 5 when
means to prevent damage to the related parts of the lock
the coupler is in lock position as described hereinafter.
operating mechanism. These related parts are con
Intergral with the end which comprises eye 22 and logs
tained internally of the coupler. Accidental disassembly 30 24;and 26 is an intermediate section-2'8; section ‘28 being
of the related parts is prevented ‘as novel means are pro
integrally connected to another ‘and preferably smaller
vided on both the coupler and the locking mechanism
end ‘section 34). ‘Included in ‘end "section 30 is a key 32
which preclude accidental disassembly of the locking
which ‘may be -'substantially rectangular in shape. It
mechanism.
should ‘be noted that v‘end section 30 may have a diameter
It is, therefore, an object of my invention to provide a 35 smaller than intermediate section v23 but the key 32
side operated rotary lock mechanism which is contained
may ‘have an operating radius preferably equal to one;
in the coupler so as to eliminate damage of the related
half the diameter of intermediate section 28; the size of
parts of the coupler lock operating mechanism.
intermediate section 28 ‘and ‘key 32 being a matter of
practicality.
Another object is to provide a simple and e?icient
:Itshould ‘be noted that the ‘bearing surface 20 is pref
operating lock mechanism which may be easily assembled
erably enlarged to permit ‘insertion'of rotor 18 and key
into the coupler and which remains assembled during
32 1at any v:point of rotation of the latter. The enlarged
operation.
bearing surface eliminates ‘the ‘necessity of cutting a key‘
A still further object is to provide a novel interlock
ing means between a rotor and its related coupler and
which means permits assembly of the rotor into the
way in the \hole Ztifo‘r the key 32.
Adapted to 'be operably ‘connected to rotor 18 is a lift
arm 34 (FIGURES ‘1, 3 and 5 through 7). The lift arm
34 comprises a’keyway 36;-disposed at an end 37 and may
nism.
be adaptable to be engaged with key 32 ‘on rotor '18. It
A still further object is to allow manual alignment of
the coupler by pulling or pushing an operating rod con 50 should 'be noted that keyway 36 may be substantially
rectangular 'and 'can only be connected to key 32. The
nected to the rotor and which rotor is retained in the
opposite end of lift arm 34 is ‘bifurcated ‘and comprises
coupler by my novel interlocking means.
‘a pair of legs 38 having aligned holes 40 for receptionof
Other objects, capabilities and advantages of my in
coupler at any position of rotation of the locking mecha
vention will be apparent from the following description
a pin 42.
and from a discussion of the ‘following drawings, in
‘which:
FIGURE 1 is a plan view of a coupler embodying my
is an lendof a link '44. The link :44 comprises an aper
tu're 46 adapted to receive pin 42. The link 44 also
Connected to pin 42 and disposed between legs 38
of parts;
comprises a ‘hook portion 47 which engages a lock 48
as by cross bar 50, wherein the cross bar '50 operably
connects and ‘preferably integral with lock 48.
FIGURES 2 and 2A are detailed plan and side eleva
tion-a1 views, respectively, of a rotor used in the embodi
ment of FIGURE 1;
sembled 1by inserting rotor 18 into the bearing surface
20, the ‘rotor 18 being inserted vfrom the ‘operating rod
side otthe coupler 10. Rotor 18‘ may be inserted at any
invention, a portion of the top of the coupler head being
broken away to more adequately show the arrangement
The "coupler 'look operating mechanism may be _ as
FIGURE 3 is a detail plan view of \a lift arm which is
point of ‘rotation as the bearing surface 20 has a radius
65 whichis large enough to accommodate the operating ra
associated with the rotor of FIGURE 2;
FIGURE 4 is a detail :and elevational view of a link
dius of key 3-2 and ‘intermediate section 28. Prier vto as
used in the embodiment of FIGURE 1, and
sembly into the‘coupler, the lift arm 34 and link'44 may
FIGURES 5 to 7 are side elevational views with the
coupler head partly broken away to show the lock operat
ing mechanism in various positions of lock, lock set and
full knuckle throw position.
To achieve clarity, certain structural details have been
be pivotally connected by pin 42, wherein link 44§is posi
tio’n‘ed between ‘the legs 38 of lift arm -34 in such a
manner ‘that the hook portion 47 faces towards the ‘front
of the coupler 10 after assembly therein. The ‘lift arm
34 and its related link 44 are assembled to the lock
3,075,650
4
operating mechanism by mating the keyway 36 1and key
32, with the arm 34 below its lower-most operating posi
tion, namely the locked position shown in FIGURE 5.
Lock 48 is then pivota-lly suspended on hook 47 by cross
bar
50.
H
'
7
i
'
i
’
face 68 of coupler 10 wherein surface 68 is located ad
jacent end 37 and at the rear end of cavity 17. As al
ready apparent from the disclosure, proper assembly
of key 32 and end 37 is, of course, assured by providing
the key with an offset portion 33 of such a dimension
FIGURES 5 to 7 illustrate the various positions of
which will prevent ‘assembly in any other relationship
operation of my novel lock operating mechanism. In
than that as shown by FIGURES 6 and 7. Link 44 re
FIGURE 5 the mechanism is shown in the normal locked
mains pivotally connected to lock 48 because of the line
position. As is shown, a lug 52 on lock 48 is disposed at
contact of link 44 to ‘lock 48 at 58.
the lower end thereof in guide 54 of coupler 10. Upon I0
The details and terms of description which I have em
rotation of rotor 18 in a counterclockwise direction by
ployed are used as terms of description and not terms of
means of the operating rod (not shown}, the lift arm 34
limitation. Therefore, it is not my intention of exclud~
is rotated counterclockwise about key 32 which results in
ing various forms of the features shown, as various modi
link 44 and lock 48 being raised. Upon disengagement
?cations are possible within the scope of the invention
of lug 52 from guide 54, lock 48 is free to pivot about 15 claimed.
pivot 50. Lock 48 is preferably counterbalanced wherein
I claim:
the center of gravity of lock 48 is disposed to the right
1. In a' railway coupler having a head with .a knuckle
of the pivot 54}. The countenbalancing effect of lock 48
pivoted thereto and containing lock means for said
will tend to rotate lock 48 in a clockwise direction about ' knuckle, the combination of a cavity disposed within said
pivot 50 when the lock 48 is not in direct contact with 20 head, a bearing opening in a wall of said head, a rotor
guide 54 of coupler it). As soon as lug 52 is free of
having an intermediate portion rotatably journalled in
guide 54, lug 52 will engage surface 56 of coupler 10.
The engagement of lug 52 and surface 56 places the lock
ing mechanism in a lock-set position. Additional counter
said bearing opening, said rotor having another portion
in said head, said other portion being substantially cylin
drical, said other portion having a key formed thereon,
said key having an offset portion extending beyond the
periphery of said other portion, mutually facing abut
clockwise rotation of rotor 18 will eliminate contact be
tween lug 52 and surface 56 and will raise lock 48 until
lock 48 is in the full throw position or unlocked posi
ments on said other portion at the ends of said key, the
tion as seen in FIGURE 7. As lock 48 is raised to the
combined width of said other portion and key being less
unlocked position, the lock 48 engages the knuckle
than the diameter of said bearing opening so that said
thrower (not shown) which in turn throws the knuckle 30 key may be inserted in any rotative position thereof
55 to full knuckle throw position.
,
through said opening, a lift arm having an open ended
It should be noted that rotation of rotor 18 to place
keyway at one end thereof Within which said key is re
lock '48 in an unlocked or full knuckle throw position
ceived, said one end being formed as to provide a sub
is limited. As seen by an inspection of FIGURE 7, rotor
stantially circular outer surface about said keyway except
18 is able to rotate counterclockwise to raise lock 48 until 35 for such portions as Where said keyway breaks through
lift arm 34 engages abutment surface 57 of coupler 10.
and Where said end is joined to said arm, ?rst bearing
Abutment surface 57 precludes the possibility of an opera
areas on said one end of said lift arm engageable with
tor rotating rotor 18 so as to raise lock 48 a vertical dis
tance wherein lock 48 is placed in a position which will
said respective mutually facing abutment on said other
portion, mutually facing rotor abutment surfaces formed
prevent the operator from returning ‘lock 48 to locked 40 in said head within said cavity, second bearing areas on
position whenever it is desired to do so.
said one end of said lift arm engageable with said re
i 'To return the lock 48 to lock-set position will require
spective mutually facing rotor abutment surfaces, an
arm end abutment surface disposed within said head
the rotationrof rotor 18 in a clockwise direction so as to
allow lock 48 to be lowered. As lock 48 is preferably
between said mutually facing rotor abutment surfaces,
counter-balanced, lug 52 on lock 48 will again engage 45 said outer surface of said one end being in close proximity
with said rotor end abutment surface only where said
surface 56 of coupler 18 with the result that lock 48 will
be placed in the lock-set position. It will be obvious to
lift arm ‘has been assembled onto said rotor with said
offset portion adjacent the outward end of said keyway,
those skilled in the art that any slight shock occurring
thereby allowing rotation of said arm about the rota
to the coupler which is caused by a mating coupler will
return the lock 48 to the locked position.
50 tional axis of said rotor without any substantial radial
As stated previously, the coupler described herein may
be subject to shocks and vibrations, depending on the
service to be performed by the coupler. In order to
prevent accidental unlocking of the coupler lock mecha
nism, the mechanism is provided with positive anticreep
means. It will be noted that the lock 48 can tilt rear
wardly so that the upper rear corner 49 of lock 48 en—
gages ledge 49a of a coupler 10.
V
movement of said arm with respect to said rotational
axis, means operatively connecting said lift arm to said
lock means for operation of the latter in response to
rotation of said rotor, means engageable with said lift
55 arm to limit upward movement of said lock means, said
keyway being operatively engageable with said key when
said arm is positioned below its lowermost operating posi
tion, said arm being prevented from becoming disengaged
from said rotor by retaining said key between said key‘
A primary ‘advantage of my locking mechanism is that
the coupler 10 may be aligned to engage a mating coupler 60 way and arm end abutment surface when said arm is,
rotated on said rotor to an operating position, and an‘
without the necessity of the operator going between the
cars.
The ‘aligning of couplers may be accomplished by ‘
using the operating rod to pull or push the coupler to
either left or right, respectively. Accidental removal
engaging eye formed at one end of said rotor extending
beyond said head for engagement with an associated
operating rod, said eye having its axis substantially per
pendicular to and offset from the rotational axis of said
rotor in the direction of said knuckle when said rotor
is in its locked position.
1) of coupler 10, and abutment surfaces 64 and 66 of
2. In a railway coupler having a head with a knuckle
rotor 18, respectively. It should also be noted that lift
pivoted thereto and containing lock means for said
arm 34 and link 44 are prevented from becoming acci
dentally disassembled from either the rotor 18 or lock 70 knuckle, the combination of a chamber formed in said
head, a pair of apertures formed in said head in an
48, respectively, because of the novel construction of the
aligned relationship to each other, a rotor having a por
internal cavity of coupler 10. The internal cavity 177 of
tion thereof journalled in said apertures, said rotor hav
coupler 10 is so constructed that after the locking
ing .a central portion in said head and an end portion
mechanism is assembled, end 37 of lift arm 34 is pre
vented from becoming disengaged from rotor 18 by sur 75 externally of said head, a key formed on said central
‘of the rotor 18 is prevented because of end 37 of lift
arm 34 engaging abutment surfaces 60 and 62 (FIGURE
3,075,650
5
portion, said key having an offset portion extending
radially outwardly from said central portion, mutually
facing abutments on said central portion at the ends of
said key, the combined width of said central portion and
said key thereon being less than the diameter of one of
said apertures so that said key can be inserted through
said one of said apertures without necessitating insertion
6
ended keyway adjacent one end thereof within which
said key is received, means on said rotor and arm to
interlock the rotor and arm against substantially relative
movement along the rotational axis of the rotor, a lift
arm abutment surface formed in said head, said one end
having a portion thereof being in close proximity to said
li t arm abutment surface so as to allow rotation of said
arm about the rotational axis of said rotor only when
said key is assembled onto said keyway so that said key
kevway at one end thereof within which said key is
received, said one end having bearing areas engageable 10 way engages the key from the side opposite said offset
portion, means on said arm and head to prevent any
with said respective mutually facing abutments on said
substantial relative movement of the arm along the rota
central portion, mutually facing arm engaging surfaces
tional axis of said rotor, said arm having the other end
formed in one wall of said head, said one end being
thereof at a position below its lowermost operating posi
formed of such Width as to be received between said arm
tion when said keyway is in a position to engage and
engaging surfaces and to be in close proximity thereto,
of a keyway therein, a lift arm having an open ended
an arm end abutment surface formed in said one wall
disengage it from said key, means operatively connecting
between said arm engaging surfaces, said one end having
a portion thereof being in close proximity to said end
said other end of said arm to said lock means for opera
tion of the latter in response to rotation of said rotor,
and an engaging eye formed on said second portion of
about the rotational axis of said rotor without any sub 20 said rotor, said eye having its axis substantially perpen~
dicular and offset from the rotational axis of said rotor
stantial radial movement of said lift arm with respect to
in the direction of said knuckle when said rotor is in
said rotational axis when said keyway has been positioned
its locked position.
on said key so that said key is adjacent the outward end
of said keyway, said arm having the other end thereof
References Cited in the ?le of this patent
at a position below its lowermost operating position
when said keyway is in .a position to engage and disengage
UNITED STATES PATENTS
it from said key, means operatively connecting said other
819,314
Renshaw ____________ __ May 1, 1906
end of said lift arm to said lock means for operation of
1,132,434
Bush ________________ __ Mar. 16, 1915
the latter in response to rotation of said rotor, and an
1,323,291
Kinne _______________ __ Dec. 2, 1919
engaging eye formed at said external end portion of said 30 1,612,775
Kelso _______________ __ Dec. 28, 1926
rotor for engagement with an associated operating rod,
1,702,372
Wittmer ____________ __ Feb. 19, 1929
said eye having its axis offset from the rotational axis
1,746,656
Kelso _______________ __ Feb. 11, 1930
of said rotor in a direction forwardly of said rotor when
1,973,862
Bazeley _____________ __ Sept. 18, 1934
said rotor is in its locked position.
1,986,440
Kinne _______________ __ Jan. 1, 1935
3. In a railway coupler having a head with a knuckle
1,990,699
Kinne _______________ __ Feb. 12, 1935
abut, lent surface so as to allow rotation of said lift arm
pivoted thereto and containing lock means for said
knuckle, the combination of a rotor having a ?rst portion
thereof journalled in said head and a second portion
externally of said head, .a key formed on said ?rst por
tion, said key having an offset portion extending out 40
2,002,508
2,217,722
2,340,818
2,585,958
2,709,528
Richards ____________ __ May 28,
Bazeley ______________ __ Oct. 15,
Metzger ______________ __ Feb. 1,
Metzger ____________ __ Feb. 19,
Kayler _____________ __ May 31,
1935
1940
1944
1952
1955
wardly from said ?rst portion, a lift arm having an open
2,831,584
Wolfe __________ ..,__..__ Apr. 22, 1958
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