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Патент USA US2127089

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Aug. 16, 1938.
c. H. scHÁ'MP' Erl/«L
2,127,089l
PERMUTATION Lo‘cK-Y.
_Filed July l5, 1937
WITNESSES
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ATTORNEY
Patented Aug. 16, 1938
2,127,989
UNITED STATES PATENT GFFICE
2,127,089
PERMUTATION LOOK
Charles H. Schamp, Milwaukee, and Daniel J.
Foote, West Allis, Wis., assignors to Master
Lock Company, Milwaukee, Wis., a corporation
of Wisconsin
Application July 15, 1937, Serial No. 153,692
10 Claims.
The invention relates to locks and more par
ticularly to permutation locks.
'
(Cl. 70-25)
pins or posts 22 and 23, which also secure the
front cover plate I9 of the shell to the front plate
‘
An object of the invention is to provide a per
I6 of the case.
'
mutation lock having improved and vsimplified
means for placing the lock in locking condition
A guide member 25, preferably in the form of
a sheet metal stamping, is rigidly secured within
-.upon the movement of the lockable member
thereof, so as to avoid the possibility of inad
the case, and comprises a flat portion 26 which
rests on the inner face of the front plate I6 and
vertently leaving the mechanism in releasable
is secured thereto by the riveted pin 23. Struck
condition when the lockable member is returned
up from an end of the flat portion 26 of the mem
ber 25 is a flange 21 which extends between the 10
front and rear plates I6 and I'I and is provided
with opposite lugs 28 which fit in anchor slots
29 formed in these plates. A ¿round shackle
to its locking position.
'
Another object of the invention is to provide a
permutation lock which is reliable in operation,
and which can be inexpensively manufactured
and readily assembled.
The invention further consists in the several
features hereinafter described and claimed.An embodiment of the invention is shown in
the accompanying drawing, wherein
Fig, 1 is a rear view of a. permutation padlock
constructed in accordance with the invention,
parts being removed and broken away and parts
being shown in section, the permutation mecha
nism having been adjusted to a position which
will permit release of the shackle;
Fig. 2 is a sectional view of the padlock, taken
generally along the line 2-2 of Fig. 1;
Fig. 3 is a sectional View taken generally along
the line 3-3 of Fig. 1;
Flig. 4 is a view generally similar to Fig. 1 but
showing the shackle on its opening movement;
Fig. 5 is a view similar to Fig. 4 but showing
the shackle fully withdrawn;
'
'
guiding opening 3l] is formed in the flange 21.
A U-shaped shackle 3| has its legs slidably> 15
passing through openings 32 formed in the case
and shell. The longer leg of the shackle also
slidably and rotatably passes through the open
ing 30 in the guide member 25, and the shorter
leg has a beveled end 33 and a locking notch'34y
near this end. When the shackle is Withdrawn
to its outermost position, the shorter leg clears
the shell I8, as seen in Fig. 5, and the shackle is
then capable of being swung about its longer
leg. The longer leg of the shackle is providedk
with a keyway 35 in which slidably> lits a guide
tongue 36 struck up from the guide member 25.
An annular groove 38 is formed about the end
portion of the long shackle leg and slidably re
ceives therein a forked guide and stop plate 39t 30
having an angularly extending finger 46 at one
side, as best seen in Figs. 1, 3 and 8. The forked
plate is confined on the shackle leg by the slidable
Fig. 6 is a view similar to Fig. 5 but showing
the shackle returned to its closed and locked ' engagement of an edge of the plate with the flat
position;
inner face of the case plate I1, which engage
ment also guides the shackle leg and prevents
Fig. ‘7 is a perspective view of a control mem
rotation of the forked plate with respect to the ber of the mechanism;
Fig. 8 is a perspective view of an 'actuating case. The forked plate is engageable with the
flange 2'I of the guide member 25 to limit the
member for the control member, and
Fig. 9 is a perspective view of a latch plunger. outward movement of the shackle, as seen in Fig.
In the drawing, I5 designates a lock case of 5. When the shackle is in its outer or withdrawn
any suitable shape, and in the present instance position, it clears the tongue 36 to permit free
of cylindrical form and comprising a front plate swinging of the shackle.
A locking lever 4I, forming a locking member,
I6 and an embossed rear plate I 1, the former
plate being integral with the cylindrical portion is pivotally mounted on the pin 22 and movablyI
of the case.
The case I5 has an enclosing cup
carries a spring-pressed latch member, here
shaped shell I8, preferably a sheet metal stamp
shown to be in the form of a cylindrical latch
plunger 42 slidable in a bore 43 formed in the
front cover plate I9 engaging the front plate I6 locking lever at right-angles to the'pin 22. , The
latch plunger has a beveled nose 44 engageable
of the case. An embossed rear cover plate 20
marginally bears on the rear plate I'I, and both ‘in the shackle notch 34 to resist Withdrawal of
of these plates are secured in place by a flange the shackle when the locking member is locked,
ing, which fits closely on the case and has 'a
2| formed by spinning over the rear edge of the
shell I8. Preferably, the front and rear plates
I6 and Il are further secured in place by riveted
(l
as hereinafter described. A compressed coiled
spring 45 within the locking lever extends within
the hollow inner end of the latch plunger and.
2
2,127,089
urges the latch plunger outwardly. A nat-bot
an arcuate edge 68 concentric with the pivotal
axis of the arm and of substantially the same
radius as that of the tumblers, the ends of the
arcuate edge being rounded. A lug 69 is bent
out from the control arm adjacent the arcuate
edge, and its outer face is preferably offset ín
war-dly from the arcuate `edge so as` to form a
shallow depression or notch 10. The lug 69 lies
in the path of outward travel of the finger 48
scribed.
’
’
A stud 48 is rigidly secured, as by riveting, to> „of the forked plate 39 on the long shackle leg, so
an embossed portion of the rear case plate 'I1 "as to cause the control arm to move the tongue
41 of l,the locking lever 4I out of the tumbler
and projects forwardly through apertured p'or
tions of the front plate I6 and front >cover' plate notches and to prevent the return of the tongue
I9. The tapered front end _of the stud 48 loosely `into lthese notches, as hereinafter more fully
described.
ñts in a bore 49 forme-d in an operating knob 56
tomed slot or recess 46 in one side of the latch
plunger receives the pin 22 which thus forms a
stop limiting the outward movement of the latch
plunger and also prevents relative rotation of the
plunger with respect to the locking lever. An
arcuate tongue‘or lip 41 on the locking lever co
operates with tumbler means hereinafter de
which is rotatably mounted in the front plate I6.
When the padlock is to be opened, the permu
A dished dial plate 5I is carried on the knob tation knob 50 is turned alternately in opposite
against relative rotation, the knob having at its f directions to successive predetermined positions,
inner end a cross slot 53 forming a keyway. The thus rotating the tumblers to bring the notches
rim of the dial p-late is surrounded by an annular 'thereof into registered relation, as seen in Fig. 1, -'.
bead 54, Fig. 2, which is embossed on the front #for admitting the vtongue 41 of the locking lever
cover plate I9 of the padlock shell. The dial 4 I. The tumbler 58‘is adjusted ñrst and is turned
l-inrîgaff counter-clockwise direction, as viewed in
plate bears the usual indicia, not shown, an-d con
ceals the riveted front ends of the pins 22 and 23. lïFigffl‘, causing the control arm 65 to turn counter
An'index notch 54', Fig. 2, is formed in the bead >clockwiseto the position seen in Fig. 1, by reason i.
`ofits* frictional driving engagement with the
54V to co-operate with the dial indicia.
A driving tumbler or disk 55 is concentric and tumbler, the control arm being stopped in this
rigid with the knob 50, as by keying and riveting ivposition by the engagement of the projection 61
it on the transversely slotted inner end of the ïwith the locking lever. In this position the con
knob, and carries the usual transfer pin or lug 56. trol arm will not obstruct the movement of the
`One`or more additional tumblers or disks, two '.lockingglever 4I. The shackle is then displaced
ïbeing shown in the .present instance, are rotata »outwardly'with- respect >tothe lock case, the
`ble ony the 'stud 48, and are designated by 51 notched short leg of the shackle turning the lock
and :58. These are generally similar except for ing lever 4I to the position seen in Fig. 4, in
`the, positions of their transfer lugs 60. The which the locking lever tongue enters the tumbler
> tumblers are separated by washers 6I which have
notches.` , The shackle is then freed from the
key projections entering a keyway 62 in the stud
-48.. and are placed under friction by a compressed
--latch> plunger 42 Vand can be withdrawn to the
outermost position seen in Fig. 5. During the
' coiled spring 63 surrounding the rear portion of t'out'ward movement of the shackle, the finger 40
the stud 48'." >As seen in Fig. 2, the keyway 62 Áon' -the long shackle leg Vengages the lug 69 on 11:0
vthe control arm 65 and swings this arm, in a
yto retain the tumblers and other parts on the clockwise direction as viewed in Fig. 4, a longi
:stud Yprior to Atthe attachment to the case of tudinal edge of the control arm acting camwise
the rear plate I1, this plate and the several and forcing the tongue 41 of the locking lever
45 parts mounted thereon thus forming an easily ç out of the tumbler notches, thereby restoring the
> stops 'short‘of the front end of the stud so as
' handled’subassembly.
`
locking lever'to Yitsinormal locking position, as
seen in Fig. 5. The lug 69 of the control arm
slots or notches 64 formed therein to admit the is brought below the tongue 41,‘thus preventing
» tongue 41 of >the locking lever when these slots -this tongue from reentering the tumbler notches,
.which latter remain in their registered position. _;
50 areïproperly positioned and registered, as herein
. after described, thus permitting the locking lever Whenthe control arm 65 is swung by the-ñnger
to‘ be swung, 'as seen in Fig. 4, to allow the release 4U, the tumbler 58 does not move with it because
¿of lthe presence of the tongue 41 in the tumbler
or outward` movement of the shackle 3|.
'I‘he tumblers 55, 51 and 58 have peripheral
Means are provided for automatically placing
55 the padlock in locking condition upon the move
`-ment of the shackle, and includes a shiftably
' mounted 'control member 65 which acts on the
locking lever 4I. The control member is pref
erablyV pivotally mounted and is here shown to
60 ' be` pivotally carried on the stud> 48 between the
‘ tumbler 58 andthe coil spring 63. The control
vmember is angularly shiftable by the tumbler 58
and has a releasable driving connection there
withl which is preferably of the slipping or fric
tion type and in the nature of a slipping clutch.
The control member is here shown in the form
of 4a flat metal arm held in frictional clutching
engagement with the adjacent flat face of the
tumbler 58 by the coiled spring 63, the arm hav
`ing an opening 66, Fig. '1, to receive the stud 48.
The angular movement of the control member
orarm is limited, as by providing an extension 61
thereon to engage the locking lever 4I and the
post 23 at opposite ends of the angular travel of
- the arm.
The other end of the control arm has
notches and because of the frictional engagement
of the tumbler with the adjacent spacing washer ,1
6I.¿Theshackle-impelled control arm, being in
frictional driving engagement with the tumbler
56,._has a tendency to cause movement of this
tumbler out offv unblocking position after the
Ytongue 41 leaves the tumbler notches, but whether
or not such tumbler movement will occur is de
pendent on the degree of frictional engagement
between the tumbler and the control arm and
>the speed of the control arm during the with
. drawal ofjthe shackle.
The outward movement ~
of the shackle is limited by the engagement of
the forked plate 39 on the shackle with the
flange 21 of the guide member 25. In its outer
most position the long leg of the shackle clears
the'guide tongue 36 of the guide member 25,
thereby permitting the shackle to be swung in
either direction about its long leg. When the
shackle is thus angularly displaced in either di
`rection,~it can not be moved longitudinally, since
theguide tongue 36 is out of register with the
3
2,127,089
keyway 35 in the shackle, thus facilitating the
able member for returning said pivotally mounted
manipulation of the device.
member to its obstructing position.
,
When the padlock is to be locked, the short
leg of the shackle is re-entered into the case, the
beveled end of the shackle leg forcing the latch
plunger 42 into the locking vlever 4|, against the
action of the spring 45, and the shackle reaching
the locked position seen inFig. 5.
In this ma
nipulation the linger 40 on the longjshackle leg
moves downwardly away from the lug 69 of the
control arm 65, but the control arm remains in
a position obstructing the unlocking movement
of the locking lever 4|, as seen in Fig. 6. The
locking lever has a flat surface 1|, Fig. 1, which
is engageable with the peripheries of the tum
blers to prevent rotation of the locking lever
when the shackle on its inward movement is
forced against the latch plunger. When the
shackle reaches its innermost position, the latch
plunger snaps into the shackle notch 34. The
inwar-d movement of the shackle is limited in
any suitable manner, as by the engagement of
the forked plate 39 with the curved inner wall
of the lock case.
.
When the padlock is in locked condition, the
end of the tongue 4`| 'of the locking lever 4|
tends to remain in the shallow notch or recess
1U in the end of the control arm 65, thus pre
venting jarring or shaking of the arm out of its
v
3. A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member, a rotatably adjust
able tumbler for blocking the unlocking move
ment of said locking member and movable out
of blocking position, a shiftably mounted mem
ber for obstructing the unlocking movement of
said locking member, said shiftably mounted
member having a slipping, frictional driving con
nection with sai-d tumbler and movable thereby
out of obstructing position when said tumbler is
adjusted to its unblocking position, and means
controlled by the movement of said lockable 15
member for returning said shiftably mounted
member to its obstructingposition.
i
4. A permutation lock comprising a'lockable
member, locking means for said member including
a movable locking member, a rotatably adjust 20
able tumbler for blocking the unlocking move
ment of said locking member and movable out
of blocking position, a pivotally mounted member
for obstructing the unlocking movement of said
locking member, said pivotally mounted member 25
having a slipping, frictional driving connection
with said tumbler and movable thereby out of
may move through a considerable angle and still
obstructing position, means for limiting the an
gular movement of said pivotally mounted mem
ber, and means controlled by the movement of 30
said lockable member for returning said pivotally
remain in obstructing position.
mounted member to its obstructing position.
obstructing position.
However, the control arm
If at any time
the tumbler 58 should be turned in a clockwise
direction, as viewed in Fig. 6, the control arm 65
C3 Ll would also turn in the same direction, but only
through a partial revolution since the arm pro
j ection B1 would engage the stop-forming post 23.
In its stopped position, the arm would still ob
struct the movement of the locking lever 4|.
In the locked position of the padlock, the tum
bler notches remain in register with the tongue
4`| of the locking lever 4|, unless the knob 50
should be turned, but since the control arm 65
obstructs the movement of the locking lever, the
lock can not be reopened except by working the
permutation.
What we claim as new and desire to secure by
Letters Patent is:
1. A permutation lock comprising a lockable
member, locking means for said member includ
ing a movable locking member, a rotatably ad
justable tumbler for blocking the unlocking move
ment of said locking member and movable out
of blocking position, a shiftably mounted member
55 for obstructing the unlocking movement of said
locking member, said shiftably mounted member
having a driving connection with said tumbler
and movable thereby out of obstructing position
when said tumbler is adjusted to its unblocking
position, and means controlled by themovement
of said lockable member for returning said shift
ably mounted member to its obstructing position.
2. A permutation lock comprising a lockable
member, locking means for said member includ
65 ing a movable locking member, a rotatably ad
5. A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member, a rotatably adjust 35
able tumbler for blocking the unlocking move
ment of said locking member and movable out of
blocking position, a pivotally mounted member
coaxial with said tumbler for obstructing the un
locking movement of said locking member, said 40
pivotally mounted member having a slipping, fric
tional driving connection with said tumbler and
movable thereby out of obstructing position,
means for limiting the angular movement of said
pivotally mounted member including a part on i '
said pivotally mounted member projecting be
yond the periphery of the tumbler, and means
controlled by the movement of said lockable
member for returning said pivotally mounted
member to its obstructing position.
6. A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member, a rotatably adjust
able tumbler for blocking the unlocking move
ment of said locking member' and movable out l
of blocking position, a shiftably mounted member
for obstructing the unlocking movement of said
locking member, spring means for holding said
shiftably mounted member in slipping, frictional
driving engagement with said tumbler for move
ment of said shiftably mounted member out of
obstructing position, and means controlled by the
movement of said lockable member for returning
said shiftably mounted member to its obstructing 35
justable tumbler for blocking the unlocking
position.
movement of said locking member and movable
out of blocking position, a pivotally mounted
member for obstructing the unlocking movement
of said locking member, said pivotally mounted
member having a driving connection with said
tumbler and movable thereby out of obstructing
position, means for limiting the angular move
ment of sai-d pivotally mounted member, and
means controlled by the movement of said lock
shackle, said shiftably mounted member having
7. In a permutation padlock, the combination
of a shackle, shackle-locking means including
a rotatably adjustable tumbler and a shiftably
mounted member both movable to release said
a frictional driving connection with said tumbler
and movable thereby to shackle-releasing posi
tion when said tumbler is adjusted to shackle
releasing position, and means controlled by the 75
movement of the shackle for returning said shift
ment of said locking member, and a shiftably
'ably mounted member to locking position.
mounted control member having a slipping clutch
connection With said -tumbler to displace said
8. >A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member having a projection, a
rotatably adjustable tumbler for blocking the
10
control member when said tumbler is adjusted
to unblocking position, said lockable member on 5
its movement having an impelling connection
unlocking movement of said locking member and
With'said control member to eñîect reblocking of
movable out of blocking position, said tumbler
,having a peripheral notch to receive said pro
said locking member.
jection in the unblocking position of sai-d tumbler,
’a pivotally mounted arm coaxial with said tum
bler for obstructing the unlocking movement of
said locking member, said arm having a fric
tional driving connection with said tumbler and
15 movable thereby out of obstructing position, said
arm having a laterally projecting lug and having
a shallow notch at the attached end of said
lug to receive the projection ofthe locking mem
ber When said arm is in obstructing position, and
means controlled by said lockable member on its
unlocking movement engageable With said lug to
Swing said arm to its obstructing position.
9. A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member, a rotatably adjust
able tumbler for blocking the unlocking move
y
10. A permutation lock comprising a lockable
member, locking means for said member including
a movable locking member, a rotatably adjust
10
able tumbler for blocking the unlocking move
ment of said locking member, and a pivotally
mounted control member coaxial with said tum
bler and having a slipping clutch connection with
said tumbler for effecting movement of said con
trol member in‘one direction when said tumbler
is adjusted to unblockîng position, means for
limiting the angular movement of said control
member, and means controlled by the movement
of said lockable member for moving said control
member in the opposite direction to veffect re
blocking of said locking member.
CHARLES H. SCHAMP.
DANIEL J. FOOTE`
ifi
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