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Патент USA US2113864

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pri! E2, 1938.
Filed Feb. 4, 1955
w?l'agm 2 /
Evil-@4263 FIQZg
25 '
Patented Apr. 12, 1938
Harry E. Soref and James Keith Marshall, Mil—
waukee, Wis., assignors to Master Lock Com
pany, Milwaukee, Wis., a corporationof Wis
Application February 4, 1935, Serial No. 4,869
9 Claims. (Cl. 70-25)
these plates are secured in place by a flange 2!
formed by spinning over the rear edge of the shell
l8. Preferably, the front and rear plates 86 and
I1 are further secured in place by riveted pins or
posts 22, 2,3, and 24, which also secure the front in
cover plate [9 of the shell to the front plate !6 of
_ The invention relates to looks and more par—
ticularly to , combination padlocks.
An object of the inventionis to provide a strong,
durable, and inexpensive combination padlock
5. which has relatively few parts and which can be
ciasijly assembled.
the case.
Another object of the invention is to provide
A guide member 25, preferably in the form of a
sheet metal stamping, is rigidly secured within
the case, and comprises a flat portion 26 which
rests on the inner face of the front plate {6 and is
a combination lock in which the locking mech
anism is conditioned to, locking position and the
tumbler combination upset upon the outward
movement of the shackle or other lock element.
A further object is to provide a swivel shackle
secured thereto by the riveted pin 23. Struck up
from an end of the ?at portion 26 of the mem
ber 25 is a flange 21 which extends between the
padlock in which the shackle can not be returned
from its outwardly displaced position except to
re-enter the lock.
. front and rear plates l6 and H and is provided iv
with opposite lugs 28 which ?t in anchor slots
The invention further consists in the several
29 formed in these plates. A round shackle-guid- ‘
features hereinafter described and claimed.
In the accompanying drawing, which illustrates 7 ing opening, 39 is formed in the ?ange 2?.
A U-shaped shackle 3| has its legs slidably pass
one embodiment of the invention,
ing through openings 32 formed in the case and 20
Fig. l is a rear view of a padlock constructed
shell. The longer leg of the shackle also slidably
in accordance with the invention, parts being re
moved and broken away and parts being shown _
androtatably passes'through the opening 30 in
in section;
Fig. 2 is a sectional View of the padlock, taken
the guide member 25, and the shorter leg has a
beveled end 33 and a locking notch 34 near this
end. When the shackle is withdrawn to its outer— 2
_ onthe line 2-—2 of Fig. 1;
most position, the shorter leg clears the shell is, .
Fig.3 is asectional view taken on the lin
as seen in Fig. 5, and the shackle is then capable
of being swung about its longer leg. The longer
Fig. lliis a view generally. similar to Fig. 1, show
leg of the shackle is provided with a keyway 35
ing the shackle on its opening movement;
Fig. 5 is a view similar to Fig. 4 showing the in which slidably fits a guide tongue 36 struck -.
up from the guide member 25. A lug 3'l struck up
shackle fully withdrawn;
Fig. '6 is a rear view of the padlock showing _ from the guide member is engageable with the
the shackle approaching its locking position, parts end of the long shackle leg to limit the inward
being broken away and parts being shown in movement of the shackle. An annular groove 38
is formed about the end portion of ‘thelong ;
shackle leg and slidably receives therein a forked
Fig. ‘7 is a sectional view taken generally on the
plate 39 having an angularly extending ?nger
line ‘l—‘! of Fig. 2;
40'at one side, as best seen in Figs. 1, 3 and ‘12..
Fig._ 8 is a view of one of the rotary tumblers;
The forked plate is con?ned on the shackle ‘leg,
Fig. 9 is a view of another tumbler;
by the slidable engagement of an edge of the
Fig. 10 is a perspective view of a latch plunger;
Fig. 11 is a perspective View of a shackle guide, .plate with the flat inner face of the case plate H,
;_3--3 of Fig. 1;
' Fig. 12 is a perspective'view of a tumbler rotat
ing member.
In the drawing, l5 designates a lock case of
any suitable shape, and in the present instance
of cylindrical form and comprising a front plate
16 and an embossed rear plate ll, the former
plate ‘being integral with the cylindrical portion
which engagement also prevents rotation of the
forked plate with respect to the ‘case. The forked
plate is engageable with the flange 2'! of the
guide member 25 to limit the outward movement 45
of the shackle, as seen in Fig. 5, and the ?nger 160
forms a combination-upsetting actuator as here
'inafter described.
When the shackle is ‘in its
outer or open position, it clears the tongue 36
to permit free swinging of the shackle.
.of the case. The case l5. has anenclosing cup
' Alo'cking lever 4|, forming a locking mem
‘shaped shell l8, preferably a sheet metal stamp
is pivotally mounted on the pin 22 andvmov
ing, which ?ts closely‘ on the case and has a front,‘
cover plate ‘l9 engaging the front plate It of the ' ably carries a spring-pressed latch member, here
shown to be in the form of a cylindrical latch
case- An embossed, rear cover plate ‘20 mar
’ *gi-nally‘bears onthe rear‘ plate IY'I, and’both of
plunger 42 slidable in a bore 43 formed in the.
locking lever at right-angles to the pin 22. The
latch plunger has a beveled nose 44 engageable
the shackle when the locking lever is looked, as
hereinafter described. A compressed coiled
in which the locking lever tongue enters the tum
bler notches. The shackle is thus freed from
the latch plunger 42 and can be withdrawn to
the outermost position seen in Fig. 5. During the
outward movement of the shackle the ?nger 40
spring 45 within the locking lever extends within
on the shackle engages the pin 66 on the tumbler
in the shackle notch 34 to resist withdrawal of
the hollow inner end of the latch plunger and
59 and turns this tumbler, the cam surface 65
urges the latch plunger outwardly. A flat-bot
of which forces the tongue 41 of the locking lever
out of the tumbler notches, thereby restoring the
locking lever to its normal locking position. The 10
further rotation of the tumbler 59 during the
tomed slot or recess 4% in one side of the latch
10 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-op
15 crates with tumbler means hereinafter described.
A stud 48 is rigidly secured, as by riveting, to
an embossed portion of the rear case plate I1 and
projects forwardly through apertured portions
of the front plate l6 and front cover plate 49.
The tapered front end of the stud 48 loosely ?ts
in a bore 49 formed in an operating knob 50 which
is rotatably mounted in the front plate 16. A
dished dial plate 5| is carried on the knob and
has opposite key projections 52 (one being shown
in Fig. 7) which enter a cross slot 53 formed in
the knob. The rim of the dial plate is sur
rounded by an annular bead 54, Fig. 2, which is
embossed on the front cover plate 19 of the pad
lock shell. The dial plate bears the usual indicia,
not shown, and conceals the riveted front ends of
the pins 22, 23, and 24.
A driving tumbler or disk 55 is concentric and
rigid with the knob 54, as by keying and riveting
it on the slotted end of the knob, and carries the
One or more additional
tumblers or disks, three being shown in the pres
ent instance, are rotatable on the stud 48, and '
35 usual transfer pin 56.
are designated by 51, 58, and 59. These are
generally similar except for the positions of their
transfer pins 60, and except for certain features
of the tumbler 59 hereinafter described. The
tumblers are separated by washers 61 which
have key projections entering a keyway 62 in the
stud 48 and are placed under friction by a com
pressed coiled spring 63 surrounding the rear
portion of the stud 48. As seen in Fig. 2, the
keyway 62 stops short of the front end of the
stud so as to retain the tumblers and other parts
on the stud prior to the attachment to the case
50 of the stud-carrying rear plate I1, which thus
forms an easily handled sub-assembly.
The tumblers 55, 5?, and 58 have peripheral
slots or notches 64 formed therein to admit the
tongue 4'! of the locking lever when these slots are
properly positioned and registered with a V
shaped notch 64' in the tumbler 59, thus permit
ting the locking lever to be swung, as seen in Fig.
4, to allow release of the shackle 3!. The notch
64' in the tumbler 59 has a cam surface 65 which
is engageable with the tongue 4'! of the locking
lever to urge the tongue out of the tumbler
notches when the tumbler 59 is turned. The
tumbler 59 is provided with a pin or projection
66 at its rear side engageable by the ?nger 4!]
65 of the forked member 39 secured to the shackle
3| to turn the tumbler.
When the padlock is to be opened, the com
bination knob 58 is turned to successive pre-de
termined positions to rotate the tumblers and
70 bring the tumbler notches into register, as seen
in Fig. l, in position to admit the tongue 41 of
the locking lever 4|. The shackle 3! is then dis
placed outwardly with respect to the lock case,
vthe notched shorter leg of the shackle turning
the locking lever 4! to the position seen in Fig. 4,
withdrawal of the shackle causes one or more of
the other tumblers to be turned in the same di
rection by the engagement of their transfer pins,
thus destroying or upsetting the combination, as
seen in Fig. 5. The outward movement of the
shackle is limited by the engagement of the
forked plate 39 on the shackle with the ?ange
27 of the guide member 25. In its outermost po
sition the long leg of the shackle clears the guide 20
tongue 36 of the guide member 25, thereby per
mitting the shackle to be swung in either direc
tion about its longer leg. When the shackle is
thus angularly displaced in either direction, it
can not be moved longitudinally,.since the guide
tongue 35 is out of register with the keyway 35 in
the shackle, thus facilitating the manipulation
of the padlock.
When the padlock is to be locked, the shorter
leg of the shackle is re-entered into the case, the 30
beveled end of the shackle leg forcing the latch
vplunger 42 into the locking lever 4|, as‘seen in Fig.
6, against the action of the spring 45. The look.
ing lever has a flat surface 61 which is engageable
with the peripheries of the tumblers to prevent 35
rotation of the locking lever when the shackle on
its inward movement is forced against the latch
plunger. When the shackle reaches its inner
most position, the latch plunger snaps into the
shackle-notch 34. The inward movement of the 40
shackle is limited by the stop lug 3'! of the guide
member 25, or if desired, by the pin or post 24.
The construction of the padlock is such as to
reduce the number of essential parts and to sim
plify assembly. For example, the pin 22 con 45
nects the front and rear plates of the case, se
cures the front cover plate of the shell to the
front plate of the case,
ing lever, forms a stop
prevents rotation of
forked plate 39 on the
forms a pivot for the look
for the latch plunger, and
the latch plunger. The 50
shackle not only forms an
actuator for returning the locking lever to look
ing position and for upsetting or destroying the
combination, but also forms a stop for the
What we claim. as new and desire to secure by
Letters Patent is:
l. A lock comprising a pivotally mounted look
ing lever, a tumbler for blocking the pivotal un
locking movement of said locking lever and mov~ 60
able out of blocking position, a yielding latch
plunger slidably carried by said locking lever and
forming a projection swingable therewith, and a
lockable member engageable with‘ said latch
plunger and retained thereby when said locking
lever is in blocked position.
2. In a lock, a locking lever, a pivot member
for said locking lever, a yielding latch plunger
carried by said locking lever and engageable by
said pivot member to limit the movement of said
plunger and to prevent relative rotation of said 70
plunger with respect to said locking lever.
3. A look comprising a movable locking mem
ber, tumbler means for releasably blocking the
unlocking movement of said locking member, a
yielding latch member carried by. said locking
shackle being swingable about its longer leg when
latchmember and retained thereby when said
plate secured in said case and having a struck’
up apertured ?ange and a struck-up tongue
member, a lockable member engageable with said . the shorter leg is clear of the case, and a guide
locking member is in blocked position, and means
including the tumbler means controlled by the
. movement of said lockable member out of locking
position for’ returning said locking member to
locking position.
4. A lock comprising a movable locking mem
10 oer, a yielding latch member movable with said
spaced from. said ?ange, said ?ange slidably and
rotatably receiving the long shackle leg, and said.
long shackle leg having a keyway receiving said
tongue and being free of said tongue when the
shackle is in its outermost position.
'7. A look comprising acase having openings, a 10
locking member, a rotatably mounted tumblerv shackle having legs slidable in said openings, one
for blocking the unlocking movement ' of said.’ of said legs being longer than the other and ro
locking member and rotatably adjustable out of tatable in its opening, said longer leg having an
annular groove, a forked member movably ?tting
blocking position, a lockable member held in lock
in said groove and retained against rotation with 15
lockingmember is in blocked position, and means respect to said case, and shackle-locking means
carried by said lockable member engageable with in said case including a tumbler movable by said
forked member on the outward movement of the
said tumbler to turn said tumbler to blocking ‘po
to turn said tumbler out of unlocking
sition on the movement or said lockable member
8. A lock comprising a pivotally mounted look
5. A lock comprising a case having a, pair of
openings, a locking lever in said case, a tumbler ing lever having a guide opening therein extend
ing transversely of the pivotal axis of the lever, ‘
for blocking the unlocking movement of said lock
ing lever and movable out of blocking position, a tumbler means for releasably blocking the un
locking movement of said lever, a yielding latch 25
25 yielding latch member carried by said locking plunger slidably mounted in said guide opening,
lever, a shackle having legs movable in said open
ings and having one leg engageable with said and a lockable member engageable with said
latch plunger and retained thereby when said
latch member to lock'said shackle, and an actua
locking lever is in blocked position.
tor carried on the other shackle leg and engage
9. In a look, a locking lever, a pivot member 30
30 able with said tumbler for turning said tumbler
said locking lever, and a latch member mov
to blocking positionon‘the outward movement of
ably carried by said locking lever and engageable
, said shackle.
.6. A lock comprising a case having a pair of with said pivot member-to limit the advancing
openings, ashackle having its legs movable in travel of said latch member with respect to said 35
35 said openings and having one leg longer than lever.
the other, said longer leg being slidably and ro-k
tatably mounted in its case opening and. said
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