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Патент USA US2124912

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July 26, 1938.
|_. e. EHMANN
2,124,912
sHAcKLE
Filed July 7, 19:57
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__
2 Sheets-Sheet l
July 26, 1938.
‘
L, G, EHMANN
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2,124,912
sHAqKLE
Filed July 7,1937
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2 Sheets-Sheet _2
2,124,912
Patented July 26, 1938
‘UNITED STATES PATENT OFFICE
[2,124,912 '
snacKLE
- =
Leslie G. Ehmann, iiPlortland, :Oreg. assignor to
Electric Steel Foundry, Portland, ()reg., a cor
poration of I Qreg'on"
Application July‘ 17, 1937; Serial'No. 152,361
‘I 6 Claimsi, (01. 59-86),
trating‘a'modi?ed construction embodying the
This invention relates to shackles and pins, and
principles of the invention.
has particular reference to‘ an improved locking
device for securing the pin against accidental dis
placement from the shackle when in working
5
position.
~
-
'
‘Figure 10 is a perspective view of the pin em
ployed in the modi?ed construction.
'Figure vl1 is an end elevation of the shackle
taken along the line I l-l l of Figure 9, and illus
-'
It is an object of the invention to provide a
pin for a shackle and the like having means to
trating the locking ‘bar in operative position.
‘ Figure‘l2 is a side elevation, taken along the
engage the shackle when the pin is in‘worki'nfg
line I2--I2 of Figure 9, illustrating the manner
inwhich the locking bar is moved into inoper 10
position to prevent accidental displacementi'of
10
the pin.
1 > ~
4
ative position.
A further object of the invention is to provide
‘The ' invention
a shackle in which the pin is secured against ac
and in which position the pin is permitted a
ing a shackle having arms I and 2 provided with
pin for a shackle and the like which is readily in
serted into working position, and which vmay
readily
Additional
be removed
objectstherefrom.
and advantages
'
of the
' ~ in-‘
and modi?cations as fall within the scope of the
In the
drawings:
'
‘
.
~
7
.
'
i
a
'
Figure 1 is a side elevation of ashackle embodying the principles of the present invention.‘
"
.
Figure 2 is an end elevation of the shackle;
taken from the right of Figure 1.
a 1'
Figure 3 is a perspective view of the pin;
4—4 the opening- in the arm 2 forms a bearing 5
t'hebpe'rii'ng- in the arm 2 forms a recess 6 for the
and modi?cations may be resorted to without ~de-I
parting from the spirit or scope of the invention;v
and I deem myself entitled to all such changes
claims hereto appended.
aligned‘openings at their ends adapted to receive 15
the pin '3. The opening in the arm I is circular
in form and-is clear, while the opening in the arm
211s interrupted by parallel shoulders 4-—4 mid
way of'the opening. Inwardly of the shoulders 20
for tbsp-ma; Outwardly of the shoulders 4-—4
vention will become apparent‘ as the description
proceeds in connection with the’ accompanying
drawings, it being understood that the drawings
are illustrative only and that various changes
v "
..
reception-of the’ lug l I.
‘l~As'bestseeriin‘FiguresB to 8, the outer face of}
the aim: isrece'ssed/annularly of the opening 25
therethrough; the'cut'aw'a-y portion being inter
rupted itoifqrm-disconnected recesses l and 8.
Therecess ‘l is disposed eccentrically to the open
ing for-the pin, its area diminishing from one end
thereof to; the- other, and the edge or wall thereof
approaching‘ the wall of the opening to form a
cam 9.l The-recess 8 is concentric with the open
ing-‘for the pin, and is displaced from the recess 1
by'an‘ arc of approximately 130°.
vThe pin 3 is best illustrated in Figures 3 and 4
a' rectan'gularglug H at the other end.‘ Inter
2, and particularly illustrating the locking mech
mediate the head Ill and the lug H the pin is
.
-
'
Figure 5 is a sectional detail taken on- the-line
5—5ofFigure4.
Figure 6 is a fragmentary end
_
View of‘thej
J’
shackle showing the pin in working ‘position; and
illustrating the initial step in positioning the pin
to secure it against accidental displacement] The
view is taken along the line 6—6 of Figure 1..
Figure '7 is a view similar to Figure 6 showing
the movement of the locking bar as the pin_is
50 rotated
Figureinto
8 is locked
a view position.
similar to Figure
‘
6 showing’
the position of the locking bar with ‘the pin
locked in working position, and illustrating the
initial step in removing the pin from the shackle.
Figure 9 is a side elevation of a shackle illus
0
and comprises a hexagon head It] at one end and
Figure 4 is a fragmentary side elevation, ‘partly
in section, taken along the line 4'-4 of- Figure
anism.
5.5
illustrated in its
simplest form, the embodiment thereof compris
15 rotary
A further
motion.
object of the invention is to provide
*
> a
40
is herein
cidental displacement when in working position,
round to conform to'the openings in the arms of
the shackle; there being however, a neck I2 inter
connecting the lug I I‘ and the body of the pin, the
diameter of which is such as will permit it to
rotate in the‘ opening de?ned by the opposed
parallel shoulders 4-4.
*Extending diametrically through the pin 3 is a
lock bar ‘l3. ‘For the reception of this lock bar a
hole l4 is-drilled through the pin,‘ the center of the
hole being in the plane of the inside surface of the
head ID. The bar I3 is of greater length than the
diameter of the body portion of the pin 3, it
being of suf?cient length to extend from one side
ofv the body portion of the pin and therethrough
to, theedge of the head In on the opposite side
of the pin. The underside of the bar I3 is re
cessedas at 15.
'
o
55
2
2,124,912
Disposed in the center of the pin 3 in such man
ner as to engage the bar I3 is a helical spring I6.
The spring I6 is designed to extend into the recess
l5 of the bar I3 to prevent movement of the bar
through the pin more than a predetermined dis
tance in either direction. The recessed portion of
the bar I3 is so formed that the point of greatest
resistance to the spring I6 is at the longitudinal
center of the bar, from ‘which; 'pointmll’theiislib
face engaged by the spring recedes-towafd'the
the opening between the parallel shoulders 4-4
and the pin may be removed from the shackle.
In Figures 9 to 12 inclusive is illustrated a
modi?ed form of construction comprising a
shackle 20 having arms 2| and 22 through the
ends of which are aligned openings for the
reception of a pin 23. One of the openings is
internally threaded for the reception of the
threaded end portion of the pin 23.
“'As‘be‘st seen in Figures 11 and 12, the outer 10
ends of the bar. The recess I5 is of such length ' i’ace of the arm 2| is recessed annularly of the
as to permit the bar to be moved through the pin =op‘ening therethrough, the cut out portions of
to the extent that an end thereof will project theaface of the arm forming spaced notches 24.
from the pin to the edge of the head l0. At the‘ _ The notches24 are equal in size and depth and
ends of the recess IS the bar resinnesitsi'n'ornial were positionedhalnnularly of the opening through
shape to close the ends of the’ holel'f-l?'thé‘ehdsfi‘o‘f ithe‘ armv 'infun‘opposed relation.
the bar forming stops I‘! to be engaged by the
The"pin"'23'is ‘cylindrical in shape to conform
spring IE to prevent accidental ~~displacement~ot vto==the=openingsfthrough the arms 2| and 22,
the bar‘
20
v_
It will be noted that the lug H is dispose?i'at
right angles to the bar I 3. Also that the hexagon
head‘lll is of su'?icient size to form-a cover'for
the recesses ‘l and 8 'inl‘the 'face of'the' sand.
The last mentioned construction is'for theiobvi
ous purpose of preventing vsmall ’ rocks and 3 other
such foreign matter from yenterinigi-therecesses
and interfering with the locking'mechanism.
To place the pin in the shackle, ltheipin
inserted through the‘aligned openings " ‘in " the
30 arms I and 2 in such-manner that-‘the'rectang'u
lar lug II will enter the opening betweenihe
shoulders 4-4 in the- arm 2. To accomplish
this the bar l3 will of necessity have been; moved
through the pinso that it will project'inftofthe
’ recess 1 at its widest point. :This is the. posi
tion illustrated inFigure '6, Thereupon; the-pin
is turned in the only directionposs'ible, the carn
like wall 9 of the recess I servingitoipushr the
bar l3 through the pinto cause the opposite
40
end thereof to project into therecess-B.
the
bar is pushed through thespinlby-thevcamJ,
the spring I5, relatively speaking,-§mov‘es'from
one end of the recess I5, across the raisedfpob.
tion l8 and into the other fend'of the recess.
Thereupon, the spring engages lthegstopv 11 to
prevent further‘ outward movement’ 1of. vthe Tbar,
tirely»within .the body of the pin.
'
To place the pin 23 in the shackle 20 the pin 30
is" inserted in'the aligned openings in the arms
2| v~andq22 and caused to threadedly engage the
latter. When the pin has been tightened ‘as
much as desired,-the<hole 28 is caused to'align
with one of the notches 24 and the bar 21 is
causedtoproject into the notch. To accom
plishithisla ‘punch’ or nail may be inserted into
the>~hole-23 to move the bar into the position
illustrated in Figure 11. With the bar'21 in
operative engagement with one of the notches
24 1itgis impossible to'unscrew the pin from the
shackle unless su?lcient force be applied to shear
o?‘the'projecting end of the‘bar.
-To~remove-;the pin‘ from the shackle, a nail or
punch‘is ‘inserted in the hole 28 to ‘move the
bar 21 out of thernotch 24'and into inoperative
is by the inclined surfaceof the recess-‘l5. __
is illustrated the manner in which a nail 29
_ _
it is permitted a rotary motion commensurate
with the permitted arcuate movement-oi =the
bar I3 from end to end of the recess‘8._}_;_When
thepin 3 is in locked positionithe ‘lug-licen
gages the shoulders 4—‘4,>as shown?ine-Eigure-y5,
the end walls of’ the recess Bpreventing the
pin from being rotated into -a position tor-permit
the lug to be withdrawn through <4the opening
between the shoulders.
,
I
To‘ remove the pin, from the:shackle,v; force
must be applied to the end ofthe bar-43m
move it through the'pin 3 to cause ittoproject
into the recess 1, whereupon the;pin~-Vmay be
rotated into position to enable thelug- llttqt-be
65
is-a lock-bar 21. For the reception of this bar
a»hole~-28 is drilled through the pin, the center
of the hole being in the plane of the inside-sur
face'of the head 25. The length of the bar is
equal to the diameter of the pin, and when‘in
inoperative position the bar is contained en
position, whereupon the pin may be unscrewed
The recess 8 describes an ‘arc, of approximately
60
engaging the arm~;22.
‘Extending diametrically through the pin v23
and the bar is maintained in extended-“position
by reason of the, resistance go?eredvthedspring
120°, and when the pin'3 isin-lockedrposition
55
and having a head 25 at one end and a screw
thréadi25'cut upon the other end for threadedly
toi'disengage :the shackle arm‘ 22.
In Figure 12
may be applied to push the bar-21 out of reg 50
istry {with-the notch- 24' and into inoperative
position. Thenotches'24 are ‘disposed in unop
posedr'relation to‘prevent the bar vfrom being
moved through the pin and into'registry with
one of the other notches when it is desired to 55
remove theypinwfrom-the shackle. The wall‘of
the opening for the ‘pin intermediate ‘the notches
24’ forms rastop ‘30 ~against which the bar abuts
when moved into inoperative position.
(Although the invention has been described as 60
being particularly applicable to a shackle, its
application’ is not necessarily con?ned thereto,
but may be used either in its entirety or in part,
and either with'or‘without modi?cations, in any
construction requiring a readily insertible and 65
withdrawn through the opening "between' the
shoulders 4-—4. In Figures 4 and-"8 :isi-llustrated
detachable pinfsu'ch as in trailer hitches and
the like,‘ and'I'deem myself entitled to all‘ ch
the manner in which a punchda'or othentool
uses, modi?cations and variations as fall within‘
the‘ spirit and scope‘ of the appended claims.
may be applied to push the bar l3 out of registry
70 with the recess 8 and into registry with "the
Having now described my invention and in
recess 1. By referring to ‘Figure 81 it=will ‘be-seen
that after the bar l3 shall have‘ been moved into
registry with the recess 1, "the- pin "mayethen
what-'manner‘the same'may'be used, what I
claim-‘as new and ‘desire to protect by Letters
_ be rotated into the positionshowrr ini'li'igure‘ 6,
v115A iseeurling means having spaced apart,
is
in which position the lug l l is in alignmentl'with
Patentiis:
_
aligned mp'enings" for themeception of a pin, a
3
2,124,912
recess disposed annularly of one of said open
ings, one portion of said recess forming a cam, a
pin adapted to be inserted through said openings,
opening therethrough, the out out portions of the
face of the arm forming spaced notches posi
tioned annularly of the opening in unopposed re
said pin having a head at one end and having lation; a pin for said shackle having a head at
a lug at the other end for securing the pin in said one end and having a screw thread on the other
openings, a bar disposed through said pin adja- , end for threadedly engaging the threaded open
cent one end thereof, said bar being movable
through said pin, said cam being adapted to en
gage said bar upon rotation of said pin to move
10 the bar through said pin to lock said pin in work
ing position.
2. In a pin for a shackle and the like, said pin
having a head at one end and having means at
the other end for securing the pin in the shackle,
15 a bar disposed diametrically through said pin ad
jacent one end thereof, said bar being movable
through said pin, spring actuated means for re
sisting the movement of said bar, and stop means
engageable by said spring actuated means to limit
20 the movement of said bar.
3. A shackle and the like having arms provided
with aligned openings for the reception of a pin,
the opening in one of said arms being interrupted
by parallel shoulders midway of the opening,
25 the outer
face of the other of said arms
being cut away annularly of the opening there
through to form disconnected recesses adjacent
said opening, the wall of one of said recesses ap
proaching the opening to form a cam; a pin for
30 said shackle having a head at one end and a lug
on the other end, said lug being insertable be
tween said parallel shoulders for engagement
therewith when the pin is rotated, a bar disposed
through said pin under said head for removably
35 engaging one of said recesses, said cam being
adapted to engage said bar upon rotation of said
pin to move the bar through the pin to cause
said pin to so engage one of said recesses as to
secure the pin in working position.
4. A shackle and the like having arms provided
40
with aligned openings for the reception of a pin,
one of the openings being internally threaded for
engagement by a pin, the outer face of the other
of said arms being cut away annularly of the
ing in the shackle arm, a bar disposed through
said pin under said head for removably engaging
one of said recesses to secure the pin in working
position.
10
5. A shackle and the like having arms provided
with aligned openings for the reception of a pin,
means disposed in the opening of one of said arms
for engaging a pin upon rotation of the pin there
in, the outer face of the other of said arms be
ing cut away annularly of the opening there
through to form spaced recesses annularly of said
15
opening; a pin for said shackle having a head at
one end and having means at the other end for
engaging the ?rst above named means, a bar dis 20
posed through said pin under said head for re
movably engaging one of said recesses, said bar
being movable through said pin into engagement
with one of said recesses for securing the pin in
working position, and means to resist accidental 25
movement of the bar through said pin out of
engagement with said recess.
6. A securing means having aligned openings
for the reception of a pin, spaced recesses dis
posed annularly of one of said openings, means 30
disposed in the other of said openings for engag
ing a pin upon rotation of the pin therein, a pin
adapted to be inserted in‘ said openings, said pin
having a head at one end and having means at
the other end for engaging the ?rst above named 35
means, a bar disposed through said pin under said
head for removably engaging one of said recesses,
said bar being movable through said pin into en
gagement with one of said recesses for securing
the pin in working position, and means to resist 40
accidental movement of the bar through said
pin out of engagement with said recess.
LESLIE G. EHMANN.
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