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Патент USA US2133528

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Oct.~18, 1938.
`
D. M. BELL
2,133,528
KEY AND PERMUTATION OPERATED PADLOCK
Filed' Dec. 5, 1933
4 sheets-sheet 1
ou. 1s, 193s.
~D_ M, BELL
I
2,133,528
KEY AND PERMUTATION OPERATED PADLOCK
Filed Dec. 5, 1933
4 Sheets-Sham'l 2
O¢t.1s,1938.
'
QM, BELL
»
2,133,538
KEY AND PERMUTATION OPERATED PADLOCK
Filed Deo. 5, 1933
4 Sheets-Sheet 5
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oct. 18, 1938.
‘
D, M, BELL
I
2,133,528
.KEY AND PERMUTA'TION OPERATED PADLOCK
Filed Dec. 5, 1953
25
4 Sheets-Sheet _4
Patented Oct. 18, 1938
'
' `
I
I
l
UNITED STATES PATENT VnolfFicE ”
KEY AND PERMUTATION VoPERATEn
PADLooK
Dillwyn M. Bell, River Forest, Ill., _assignor to
Dudley Lock Corporation, Chicago, Ill., a cor
poration of Illinois
A
.«
Application December 5, 193s, seriei No. 701,022
15 claims.
This invention relates to padlocks in which
(ci. 'zo-_25)
`
tumblers, II, of the key lock project for normally
the control of the locking elementv or shackle holding the plug, 8, against rotation.
is alternatively elîected by a permutation mech- _
'A diskor plate, I2, is rigidly associated with
anism and a key-operated mechanism so that the'
5 lock may be opened either by means of' a key
or by setting up the permutation elements in
accordance with a key “combination”. The invention includes various improvements in details 'of construction and in respect to the op-
l0v eration of the elements as herein shown, described and explained, and as indicated by the
claims.
In the drawings: '
the ' spindle, l, for rotation therewith, and is
formed with a notch, I3, into which there ex Cl
tends the arm of a lever I4, fulcrumed at I5
in the casing. Thev shackle,'2, has notches, I6,
formed in both its legs, and is held in locked
position in the casing by a pair of locking dogs,
Il, which respectively engage said notches,_|6. 10
As seen in Figure 4, these dogs, Il, are similar
' in shape and are urged yieldingly apart by
springs,- I8. `They are guided,l for movement into
Figure 1 is a face view of a padlock embodying
‘.5 this_invention.
Figure 2 is a vertical section on an enlarged
scale showing certain portions of the interior
mechanisrn having to do with the operation of
the lock by means of a key, the permutation ele2o ments being removed from the casing to permita,
' clearer View of the key-operated parts.
Figure 3 is a similar vertical section taken,
however, at a. plane farther forward than Figure 2 so as to include portions of the permutation
25 mechanism.
Figure 4 is a horizontal section taken sub-
and out of the notches, I6, by the pocket or guide-way, I9, formed in the casing, I, and are con- 15'
nected for simultaneous movement in opposite
directions by means of a lever, 2U, which is ful
crumed on a pivot, 2|, secured in theupper wall,
Ia, of the casing. The opposite ends of the lever,
20, are notched, as indicated at 22, and said 2o
notches engage circular lugs or pivots, 23, pro
jecting from the faces of the dogs, I l, adjacent
the leVei‘, 20~ Eeeh 0f the dOgS has a 111g, 25,
DI’OJ'ecting from its ODDOSite face, and the leVel’,
I4, has an arm, 24, which normally contacts with 25
One 0f the lugs; 25, ÍOI' Withdi‘ewîng the dogs,
stantially as indicated at line 4_4 on Figure 3,
Il, from the notches, IB, when the notched plate,
Figure 5 is a vertical section showing the same
. I2, iS rotated by means 0f a key inserted in the
parts as Figure 3 but with the shackle shifted
30 through the mmm portion of its-Opening move-
slot, 6. Preferably, the inner faces of the dogs,
Il, are slightly inclined as seen at Ila, and the 30
ment,
cooperating faces of the notches, I6, are simi-
Figure 6 is a Vertical sectiòn showing thé-'same'
parts as Figure 5 but with the shackle shifted
larly inclined at. I6a so that when the shackle is
locked any outward pun upon it Wn] tenfi~t0
farther toward its open position, Y
35
crowd the dogs farther toward locking pos1t1on
Figure 7 is a transverse vertical section taken
substantially as indicated at line 'I-l on Fig-
ure 5_
.
'
For the sake of convenience and clearness the
features of construction concerned with the key
‘i0V operation of the look wi11 be mst described. Figure 1 is an external View showing the casing’ I,
.
.
.
'
.
rather than t0 force them back out 0f th? 35
notches’ ‘6- ,
_
_
_
The permutation mechanlsm includes three
notched tumbler disks’ 26’ 21 and 278’ journaled
for rotation' on* the upstandîng Spindle’ 1‘ A
WW1' 29’ is nnerumed on the .Same pivot: ‘5’ 40
which carries the lever, I4, and 1s ìformed with a
. tooth, 30, dimensioned to enter the notches, 26a,
1n which the shackle, 2, 1s slidably mounted, and
21a and 28a, of the three tumbler disks when said
which Carries. on it? front face .2'.rotatab1e~ dial
45 member» 3’ W‘th Whl‘îh there 1S, nglîny assoclated
tumblers are adjusted ywith the notches in reg
istretion with eeen other and with the tooth, ao,
a knob, 4, for adJustmg the dial with respect to
‘a’ nXed Índex mark’ 5’ 0n the face 0f the casing’ I’
The knob» 4, 1S formed With 2» Central aperture
aiîordingl access t0 the key Slot, 6, 0f the Centrally
50 disposed spindle, 1, of the plug or barrel of the
key lock. Said spindle, I5,> is Seen -upstandins
above the Diane 0f Section in Figure 2, While a
portion of the barrel, 8, is shown in section journaled in the fixed cylinder, k9, of the key lock
55|` which is formed with grooves, I I), into which the
of the pew/1_ However" to permit entry of the
pawl tooth, 30, into the notches, -it is necessary
that en additional disk or plate, 3|, be shifted
around the axis of the spindle, : 1, to bring its
notch, 3Ia, into registration with the others. This 50
is effected by a. short initial movement ofthe
shackle, 2, toward unlocking` position, whichv is
permitted ‘by the excess width of the notches,
I6, over the thickness of the locking dogs, Il. At
any time `while the dogs, I'I, remain in locking 55
2,
2,133,528
position, the shackle, 2, may be withdrawn to
free to be adjusted rotatably in either direction
this extent, as shown in Figure 5; and since the
disk or plate, 3|, has an arm, 32, engaged with
in the usual manner by means of the knob, 4. It
may be understood that said disks are provided
with lugs or bosses projecting from their mutually
opposite surfaces to afford a driving connection
from each disk to the next, by which they may
the longer leg, 2a, of the shackle, 2, (by exten
sion of a terminal lug, 32a, into a groove, 2b, of
said shackle leg) the initial outward movement
of the shackle causes suii'icient rotation of the
plate, 3|, to'bring the notch, 3Ia, into alignment
or registration with the notches of the tumbler
l0.
be rotatively adjusted by turning the knob, 4,
first in one direction and then in the other, un
til the deep notches of the 'disks are brought into
disks, and thus permit entry of the pawl tooth,
30, into said notches. The pawl is urged into
the notches by means of a relatively heavy spring,
_registration with the pawl tooth, 30. The posi
end hooked over the tooth portion, 30, while the
opposite end reacts against a partition wall of
of a pair of lugs, 4a, engaging notches, 4|, in a
hub or. collar, '42, associated with the disk, 28.
In the normal, completely closed position of
the shackle, l2, as shown in Figure 3, the tooth,
30, of the spring-pressed pawl, 29, rests upon the
periphery of the disk or plate, 3|, adjacent its
notch, ’3|a, and preferably this disk is made of 20
slightlylarger diameter than the disks, 26, 2'I
and 28, of the permutation mechanism, so that
while the plate, 3|, remains in this position, sup
porting the tooth, 3U, the permutation disks are
tion of such a boss is indicated at 28h, on the disk,
, 28, shown in Figures 3, 5 and 6. The knob itself
33, coiled about the hub of the coil, and with one ' is, interlocked with the outer disk, 28, by means
the case.
The pawl, 29, includes an arm, 34,
which engages the lug, 25, of one of the dogs,
I‘I, so that as the tooth, 30, moves into the reg-`
istered notches of the permutation tumbler disks,
20 this arm, 34, shifts the dog, I1, out of engage
mentwith the notch, I6, of the shackle, and,
simultaneously, the other lockingdog, I1, is simi
larly lwithdrawn from the other notch of the
shackle by virtue of the inter-connection of said
25 dogs through the lever, 20.
free for rotative adjustment.
However, since a
With the dogs, I'I, thus withdrawn, the shackle, slight outward pull on the shackle, 2, will regis
2, isfree to be moved outwardly _to open position,v ter the notch, 3|“, with the tooth, 30, and permit
and such movement causes further rotation of the latter to drop onto the edges of the permuta
the plate, 3|, through the connection of its yarm
tion disks, I prefer ,to form these edges with a
30 with the shackleleg, 2a. The notch of the plate,
3|, is formed with one side inclined to a radius
series of “false” notches, 43, of relatively slight 30
of the plate'so that 'this inclined side of the notch
notches, 26a, 2'Ia and 28a, which receive the pawl
tooth, 30, when the lock is to'be opened. Thus, in
any attempt to “feel out” the combination by
drawing out the shackle through this initial dis 35
tance and manipulating the knob, 4, the move
shall act cam-wise upon the pawl tooth, 30, forc
ing -it outwardly as the plate is rotated.
A sec
35 ond arm, 35, extending from the plate, 3|, sup
ports a pivoted ratchet, 36, whose spring, 3'I,
urges it toward the. peripheries of the permuta
tion tumbler disks,
Each of said disks .has a
small notch, 38„which is engaged by the ratchet,
40 36, during the outward movement of the shackle
leg, 2a, so that the `permutation disks are thus
shifted to carry their deeper notches out of reg
istration with the pawl tooth, 30, as soon as said
tooth has been swung clear of said notches by
the. camming action `of the notch, 3Ia, just de
45 scribed.
The notches of the permutation disks
are of Yapproximately the same shape >as the
notch, 3|a, in the plate, and ltend to move in
registration with the latter during >the with
drawal
of -the pawl tooth, 30. Thus, by the time
50
the shackle, 2, has arrived at open position, the
registered adjustment of the notches of the per
mutation 'disks has been destroyed, rendering it
impossible for anyone tampering with the lock
t,o discover the Vcombinationrby any external ma
55
nipulation of the shackle of the knob, .4: The
dogs, |'I, are no longer held out of locking posi
tion bythe le'ver arm, 34, but their’return is
depth, but each of the same width as the. deep
ment of the knob and its connected tumbler or
tumblerswill be blocked or seriously hampered
by engagement of the tooth, 30, with the false
notches, 43, of the permutation disks. _ The slight 40
movement of the parts permitted by engagement
of the pawl tooth in one of the false notches will
be substantially the same as that which might be
experienced if the deep notch of one of the tum
blers was registered with the pawl, thus making .
it impossible to vdistinguish between a false notch
and the -true effective notch in such manipulation
of the lock.
But all interference from the false
notches is» avoided in the normal and proper
operation of the lock by leaving the shackle, 2,
at the inner limit of its range, and thus leaving
the plate, 3|, in position to hold the pawl away
from the notched edges of the permutation disks
while they are being adjusted in accordance with
the Yworking combination of the lock. For steady
ing the movement of the shackle and retaining
55
blocked by the position >ol? the shacklev leg, 2a,xas
it yieldingly in position in the casing, a bent
spring arm, 44, of flat stock is anchored Vin the
casing so- that its angularly bent portion will
seen in Figure 6.
engage in the groove, 2b, ofthe shackle leg, 2*", 60
.
,
While the shackle is open, it may berotated
aboutthe -axis of the longer leg, 2a, and for clos
ing the lock it .is only vnecessary to align the
shorter leg,- 2‘=,.with the opening in the case, and
press the shacklev inwardly. This movement
65 bring the notches, I6, back into registration with
the locking dogs, I'I, which are immediately
forced into said notches by'thei'r springs, I8. 'I‘he
inward movementof `the shackle leg, 2a, rotates
the- disk, 3|, back to the initial position, carry
ing with it thepivoted ratchet, 36, and the ñnal
portion of such movement brings the tail 39', >onto
the 'cam` surface, 40, ñxed inthe case, I, for rock
ing the ratchet "about its'pivot` so as to swing Aits
, tooth clear ofthe permutation- disks,'leaving them
while an intermediate portion of the spring bears
frictionally against the smooth surface Tof said
leg.
,
,'While there is shown'and described herein cer
tain specific structure embodying the invention, 65
it will be'manifest to those skilled inthe art that
various modifications >and re-arrangements of the
parts-may be made without departing from the
spirit and the -`'scope of the invention, and that
the same v»is not limited to the particular form 70
herein'shown and'described, except »in so far .as
indicated-bythe appended claims.
>~Iclaim:
’
Y
f -1." lnia padlock including a case and a notched
shackleï ‘slidable therein, a locking -dog engage- 75
3
aisance `
being wider than the portion of the dog whichY
tance suflicient to register its notch also With the.
pawl, permitting said pawl to enter the registered
engages in it, thus permitting of an initial move
notches; and means by which such movement of
ment of the' shackle toward unlocking position
prior to withdrawal of the. dog, permutation
the pawlshifts the dogto release the shackle,
together with a ratchet 'carried by said addi
tional disk and engageable with _the peripheries
of the tumbler disks for rotatingthem to destroy
fthe registered arrangement ofv their notches
during the opening movement of the shackle.
able with the .notch ofthe shackle, the notch
mechanism including a paWl and a plurality of
notched tumbler disks rotatably adjustable for
registering their notches with the pawl, and an
additional notched disk coaxial with the others
10 and normally blocking movement of the pawl but
connected to be rotated by the said initial move
ment of the shackle through a distance suiiicient
to register its notch also with the pawl, permit
ting said pawl .to enter the registered notches; and '
15 means by which such movement of the pawl
shifts the dog to release the shackle.
2. In a padlock including a case and a notched
shackle slidable therein, a locking dog engage
able with the notch of the shackle, permutation
20v mechanism including a pawlfand al plurality of
notched tumbler disks rotatably adjustable for
registering their >notches with the pawl, means
for moving the paWl into said notches, said move
ment serving to Withdraw the locking dog from
25 the shackle, and a member co-axial with said
disks and connected to be rotated by the shackle
in its withdrawal from locked position, said
member carrying a ratchet engageable with the
peripheries of the disk for upsetting their reg
30 istered arrangement as the lock is opened.
3. In the combination defined in claim 24, said
member being permanently engaged with the
shackle, whereby it is returned when the shackle
is returned to locked position.
35
’
4. In the combination defined in claim 2, a
cam surface provided in the casing positioned to
act against a portion of said ratchet for holding
it out of engagement with the peripheries of the
disks when the shackle is in locked position but
40 formed to release said ratchet for such engage
ment as the carrying member is rotated by With
drawal of the shackle.
.
5. In a padlock including a case and a notched
shackle slidable therein, a locking dog engage
able with the notch of the shackle, the notch
being wider than the portion of the dog which
engages in it, thus permitting of an initial move
ment of the shackle toward unlocking position
v’ prior to withdrawal of the dog, permutation
50 mechanism including a pawl and a plurality of
notched tumbler disks rotatably adjustable for
registering their notches with said pawl, an ad
ditional notched disk co-axial with the others
and normally blocking movement of the pawl
but connected to be rotated by said initial move
ment of the shackle through a distance sufficient
to register its notch also with the paWl, spring
means arranged to shift the pawl into said reg
istered notches, and an arm actuated by such
movement of the paWl engaging the dog and
shifting it for releasing the shackle.
6. In a padlock including a case and a notched
shackle slidable therein, a locking dog engage
able With the notch of the shackle, the notch
65 being Wider than the portion of the dog which
engages in it, thus permitting of an initial move
ment of the shackle toward unlocking position
prior to withdrawal of the dog, permutation
mechanism including a pawl and a plurality of
70 notched tumbler disks rotatably adjustable for
registering their notches with the pawl, and an
additional notched disk arranged coaxially with
the others and normally blocking movement of
the pawl but connected to be rotated by the said
75 initial movement of the shackle through a dis
7. In a padlock including a case and a notched 10
shackle slidable therein and having an external
ly exposed part, a locking member in the case
engageable withv the notch of the shackle, per
mutation mechanism including' a plurality of
notched tumblers rotatably adjustable and an 15"
externally exposed knob for adjustingl them with
their notches in registration and a member
which enters said registered notches in the proc
ess of unlocking the shackle, the release of the
shackle from the case requiring one of said ex
20 i
ternal parts to be moved manually after such ad
justment of the tumblers is effected, means With
in the case arranged to transmit said manuallyV
effected movement to at least one of the tum
blers to rotate the same, and means for disen
gaging the aforesaid member from the tumbler
notches during such rotation of the tumblers.
8. In a padlock including a case and a shackle
slidable therein, both legs of said shackle be
ing notched, movable locking means in the case 30
engageable with both shackle notches and in
ter-connected `for simultaneous movement into
and out of such engagement, spring means urg
ing the locking means toward shackle-engaging
position, one leg of the shackle having a portion 357.
of substantial length extending within the cas
ing beyond its notch and registerable with the
locking means when the other leg of the shackle
has been withdrawn from the casing in unlocked
position, whereby the locking means is blocked 40
against return to locking position until the shac
kle notches are again registered therewith, and
mechanism in the casing for controlling release
of the locking means.
`
9. In a padlock including a case and a shackle 45
slidable therein, both legs of said shackle being
notched, separate locking dogs in the case en
gageable with the shackle notches respectively,
means by which said dogs are inter-connected for
simultaneous movement into and out of such
engagement, spring means urging said dogs to
«ward shackle-engaging position, one leg of the
shackle having a portion of substantial length
extending within the casing beyond its ,notch
registrable with the locking dog when the shackle 55
is withdrawn in unlocked position, and thus serv
ing to retain the dogs in released position until
the shackle notches are again registered there
with, a permutation mechanism in the case hav
ing a part arranged to engage one of said dogs 60
for moving it in direction to release the shackle,
said permutation mechanism including a pawl
and a plurality of notched tumbler disks ,rotata
bly adjustable for registering their notches with
the pawl, means for moving the paWl into said 65
notches when registered, said movement serving
to withdraw the locking dogs from the shackle
notches, and a member mounted co-axially with
said disks and connected to be rotated by the
shackle in its withdrawal from locked position, 70
said member carrying a ratchet engageable with
the peripheries of the disks for upsetting their
registered arrangement as the lock is opened, said .
upsetting movement forcing the pawl out of the
notches of the disks, whereupon the aforesaid
4
2,138,525
leg of the shackle serves' to hold the dogs out ofA
gaged by the pawl if the blocking member is
locking position.
moved to clear the pawl before the disks are
'
.
~
10Q Ina padlock including a case and a shackle
properly registered.
ì
slidable therein, both legs ofsaid shackle being
l2. In the combination deñned in claim 11,
'. notched, separate locking dogs in the caseen
gageable with the shackle notches respectively,
means by which said dogs are inter-connected
mounted co-axially with the tumblers and hav
ing a substantially smooth periphery slightly
said blocking means being formed as a disk
for simultaneous movement into and out of such
larger in diameter than said tumblers which pre
engagement, spring means urging said dogs to
vents engagement of the pawl in the false notches
until said disk is shifted by said initial movement
of the shackle.
10 ward shackle-engaging position, one leg of the
shackle having a portion of substantial length
extending Within the casing beyond its notch
13. In a padlock including a case and an exter
registrable with the locking dog when the shackle
nally projecting notched shackle slidable there
is withdrawn in unlocked position, and thus
in, a locking member in the case engageable with
the notch of the shackle, permutation mechanism 15
including a plurality of. notched tumbler disks
rotatably adjustable, and an externally project
15 serving to retain the dogs in released position
until the shackle notches are again registered
therewith, a permutation mechanism in the case
having a part arranged to engage one of said
dogs for moving it in direction to release the
201' shackle, said permutation mechanism including
a pawl and a plurality of notched tumbler disks
rotatably adjustable for registering their notches
With the pawl, and an additional notched disk
arranged co-axially with the others and nor
mally blocking movement of the pawl but con
nected to be rotated by the said initial move
ment of the shackle through a distance sufficient
to register its notch also with the pawl, permit
' ting said pawl to enter the registered notches;
30 and means by which such movement of the pawl
shifts the dog to release the shackle, together
with a ratchet carried by said additional disk and
engageable With the peripheries of the tumbler
disks for rotating them to destroy the registered
arrangement of their notches during the open
ing movement of, the shackle.
11. In a padlock including a case and a notched
shackle slidable therein, a locking dog engage
able Withthe notch of the shackle, the notch
. being Wider than the portion of the dog which
engages in it, thus permitting of an initial move
ment of the shackle toward unlocking position
prior to Withdrawal of the dog, permutation
mechanism including a spring-‘pressed pawl and
a plurality of notched tumbler disks rotatably
adjustable for registering their notches with the
pawl to receive the latter under stress of its
spring, means normally blocking such movement
of the pawl but adjustable by the aforesaid initial
g movement of, the shackle to permit said pawl
movement, the tumbler disks having their pe
ripheries formed with false notches to be en
ing knob for adjusting them With their notches
in registration as a part of the process of un
locking the shackle, one of said externally pro 20
jecting parts being adapted to be moved manu
ally in the process of opening-the lock after such
adjustment of the tumblers is effected, and a
member engageable with at least one of the tum
blers and movable rotatively about their common 25
axis by said manual movement of said part for
destroying the registered arrangement of. the
tumblers.
14. A padlock comprising a case having open
ings, a shackle having legs slidable in said open 30
ings, one of said legs being longer than the other,
a shackle locking means in said case including
a rotatable tumbler movable to release said
shackle and means actuated by the long leg of
said shackle in the unlocking movement of the
shackle to turn said tumbler out of shackle re
leasing position.
15. A padlock comprising a case having open
ings, a shackle having legs slidable in said open
ings, one of said legs being longer than the other, 40
shackle-locking means in said case engageable
With the shorter leg, adjusting means including
a movable indicator and a co-operating ñxed
index extending externally of the case, said ad
justing means being operatively related to the
shackle-locking means for adjusting it to a posi
tion at which the shackle is released, and means
actuated by the longer leg of the shackle in the
unlocking movement of the shackle to shift the
adjusting means and its indicatorY out of. its 50
adjustment at shackle-releasing position.
DILLWYN M. BELL.
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