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Патент USA US3023610

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March 6, 1962
3,023,600
s. STAHL ETAL
PERMUTATION Locxs
Filed Feb. 24, 1960
a‘ Sheets-Shéet i
q I
Amvmw
WendiATTORNZ'VAS'.
HZIMZZ
March 6, 1962
s. STAHL .ETAL
3,023,600
PERMUTATION LOCKS
Filed Feb. 24, 1960
‘
3 Sheets-Sheet 2
30
I
j
1 VE TO 5
BY mmfmwz
March 6, 1962
s. STAHL ETAL
3,023,500 '
PERMUTATION LOCKS
Filed Feb. 24. 1960
3 Sheets-Sheet 3
United states harem
I 3,023,600
Patented Mar. 6, 1962
1
2
3,023,600
sure in lifting up on the locker handle in an attempt to
bend, break, or jam the internal lock parts so as to re
PERMUTATION DUCKS
Samuel §tahl,_ Milwaukee, Daniel .i. Foote, Wauwatosa,
and Kenneth H. Buchmann, Milwaukee, Wis, assignors
to Master Lock Company, Milwaukee, Wis, a corpora
tion of Wisconsin
Filed Feb. 24, 1%0, Ser. No. 10,760
13 Claims. (Cl. 70—81)
This invention relates to improvements in permutation
locks, and more particularly to a simpli?ed permutation
locker lock having an unusual ‘locking mechanism of tum
bler discs, bolt, lever, and locking slide within a case,
resulting in a lock of the character described having a
novel upsetting and self-locking mechanism, and a novel
dial assembly.
Permutation locker locks are used on lockers and the
like in schools, factories, and public buildings to store
clothes, books, and personal belongings. The conven
lease the locking bolt, or (b) by continuous rotation of
the dial of the lock he attempts to pick _or feel out the
correct combination to open the lock, or by chance pick
the lock so that the lever falls into the tumbler disc gates
or notches to release the locking bolt. With the foregoing
in mind it is therefore another speci?c object of the in
vention to provide a permutation locker lock wherein
the internal parts within the lock case are so arranged,
positioned and constructed, that their movements are
inter-related, yet move in two different planes and direc
tions, resulting in the ylocking parts, when in a normal
locked position, remaining locked due to the rectangular
projection of the locking slide which engages at right
angles a recess in the lever retainer plate, thereby pre~
venting or blocking the lever retainer plate, lever, and
locking bolt from moving up vertically, when an un
authorized person exerts external forces or pressures on
tional permutation locker locks are generally quite com 20 the locker handle trying to jam or open the look, without
plicated, and their internal parts, being formed of die
cast materials, corrode and Wear easily from usage, re
sulting in frequent jamming and di?iculty in operation.
dialing.
_
A further object of the invention is to provide in an
improved permutation locker lock a locking bolt arranged
In the present permutation locker lock the construction
to reciprocate vertically while projecting exteriorly of
is simpli?ed with all parts thereof being formed of hard 25 the lock case, together with a lever having a mechanical
wrought stamped or machined steel or brass parts, there
movement devoid of spring tension in a direction oppo
site to the line of movement of the locking bolt, the lever
being so arranged and positioned that it will not move by
A speci?c object of the invention is to provide, in a
itself to fall into the gates or notches of the tumbler discs
permutation locker lock, lock mechanism housed in a 30 of the lock it by chance the correct combination is dialed
formed rectangular no-seam case with one side rounded,
by an unauthorized person rotating the dial, the knob
and which includes a locking slide, lever, lever retaining
being blocked from movement by serrations or teeth on
bar, locking bolt, bolt support plate, springs, tumbler
a tumbler disc, whenever unusual force or pressure is
disc assemblies fastened onto a retaining or back plate
exerted on the locker handle, all of which combine to
35
and related parts, there also being a cover plate with pilot
provide an anti-picking device for the lever and lock.
rings to hold all of the operating parts in position, where
Another speci?c object of the invention is to provide a
by the lockcr lock is secured inside or within a locker door
permutation locker lock which is susceptible of easy as
and covered by an escutcheon plate with concealed screws
sembly and mounting on the door of a locker or the like.
which ?t previously punched holes in the door, the lock
A further ‘object of the invention is to provide a per
40
by providing a precision-built and sturdy locking mecha
nism which will function smoothly for years.
and escutcheon plate being fastened together by lock
washers and nuts on said inaccessible screws. The es
cutcheon plate also serves to hold the new dial-knob as
sembly backed by a notched plate with a raised ?nger
entering the ‘disc driver plate to make an interlocking
mutation locker ‘lock having ‘operative internal parts which
move under spring tension together with tumbler discs
and a dialing knob which rotate in unison to manipulate
the locking bolt of the mechanism to an open or closed
position, operatively associated with the locking handle
connection with the discs so that said discs may be ro 45 and latching bar mechanism of a standard metal locker.
tated when the dialing knob on the outside of the locker
A further object of the invention is to provide a per
is turned to dial the pre-selected combination, for move
ment and release of the locking bolt which is held under
tension.
'
In some types of permutation locker locks it is possible
for unauthorized persons to determine the combination
after the locker is closed if the user has failed to turn
the dial away from the \last assigned number. This un
mutation lock which is of relatively simple construction,
which is strong and durable, which is easy to install and
50 operate, and which is well adapted for the purposes de
scribed.
With the above and other objects in view, the invention
consists of the improved permutation locker lock, and its
parts and combinations as set forth in the claims, and all
desirable contingency can preferably be avoided by dis 55 equivalents thereof.
turbing the dial before the locker door is closed. There
fore, the present invention, as another distinctive feature,
incorporates a means of upsetting on the upstroke of the
In the accompanying drawings in which the same refer
ence characters indicate the same parts in all of the views:
FIG. 1 is a fragmentary front view of a locker door
locker door latch handle, the discs and ‘dial, to prevent un
authorized persons from seeing or noting the last num
ber of the combination on the dial after the locker lift
equipped with the improved permutation lock to control
the locker latch mechanism;
or latch bar is returned to a locked position, said opera~
of FIG. 1;
FIG. 2 is a vertical sectional view taken on line 2-2
tion being automatically accomplished by a mechanism
FIG. 3 is an enlarged vertical sectional view through
a portion of a locker ‘door and the improved permuta
bler discs, thereby simultaneously moving the dial several 65 tion lock as installed therein;
numbers away from the last number of the pre-selected
FIG. 4 is a view taken approximately along the line
which automatically upsets and disturbs all of the tum~
combination, as the lock is operated and the locking
bolt is moved on the upstroke of the locker handle, de
pending upon the force used in opening the locker door.
4—4 of PEG. 3, with parts broken away and showing the
rear of the escutcheon plate;
PEG. 5 is a sectional View taken approximately along
When a permutation locker lock is on a locker door in 70 the line S—5 of FIG. 3 showing the lock bolt in its nor‘
a normal locked position, an unauthorized person or thief
may try to gain entry by (a) exerting extra force or pres
mal locked position;
FIG. 6 is a sectional view similar to FIG. 5, only show
3,023,600
3
4
rangement not only hides the heads of the screws but
protects the same against tampering to deter unauthor
correctly dialed;
ized removal of the lock from the door 20. Between
FIG. 7 is a similar sectional view only showing the
the outer face of the locker door 20 and the escutcheon
lock released but with the tumbler discs upset;
plate 37 there is a metal ring 49 to prevent any undesired
FIG. 8 is a similar sectional view only showing therbolt
play or space when the lock is installed on the door and
moved downwardly with the tumbler discs upset, self
mounted in the manner shown. Integral pilot rings 41'
locking being accomplished;
(see FIG. 11) are formed around the bolt openings in
FIG. 9 is a sectional view similar to FIG. 6 only show
the cover plate 73 and register with openings 41 drilled in
ing the reversed lock mechanism for a locker door which
opens oppositely to that shown in FIG. 1;
10 the locker door 20 through which the shanks of the at
taching bolts 39 extend.
FIG. 10 is a face view, on a reduced scale, of the back
ing the position of the parts after the lock has been
Said raised pilot rings 41’ (see FIG. 11) aid the aline
ment of the central axis of the knob assembly with the
central axis of the lock assembly on the rear of the locker
plate;
FIG. 12 is an edge view of the lock case cover plate 15 door 20 whereby the ?nger 46’ (see FIG. 4) can easily
enter and aline with its matching slot in the circular disc
and associated door stop bumpers;
plate 47. Thus the clearance provided will be equally
FIG. 13 is a detail view of a coiled spring used in
divided, for smooth operation, whenever the dial is turned
the assemblage;
.
through a complete revolution. Said raised pilot rings 41’
FIG. 14 is a plan view ‘of one of the tumbler discs on
a reduced scale; and
20 also prevent any shifting of the lock while in use because
they ?t into apertures on the locker door. For instance,
FIG. 15 is a face view of the locking slide on a reduced
if any unusual upward or vertical pressure is exerted on
‘scale.
the locker door handle 26 ‘and is thus transmitted to the
While the improved permutation lock is susceptible of
lock bolt, the lock is restrained against ‘moving or shift
broader application, by way of illustration it has been
retaining plate for the lock mechanism;
FIG. 11 is a reduced face view of the lock case cover
shown as installed in the hinged door 20 of a locker 21 25 ing due to said raised pilot rings (and bolts) which hold
of the type used in schools, factories, public buildings, etc.
The locker 21 and the latch mechanism for the door 20
is of standard construction so only certain features there
the lock in place.
The numeral 42 (see FIGS. 3 and 4) designates a
notched combination setting plate of a type well known
in the permutation lock art and which can be arranged
of will be brie?y described. Within the vertical margin
"of the locker door 20 opposite the hinged margin thereof, 30 in a variety of circularly advanced positions so that a
selected pair of diametrically opposed notches 43 therein
there is mounted ‘a vertically reciprocating latch bar 22
will engage a pair of diametrically opposed semi-circular
which is adapted to be raised and lowered to bring a
lugs 44 formed on the ring 45 surrounding the opening in
‘shouldered slot 23 into and out of latching engagement
the inner end of the knob 33. Also the notched plate 42,
with a latch dog 24 ?xedly mounted on a frame portion of
'the locker adjacent the vertical margin of the locker door 35 which has a central circular opening therein, has adja
cent a marginal portion of said central opening an inte
opening. Said latch dog carries resilient door stop
gral ?nger 46' at right angles to the plane of the plate 42
bumpers 25. On the exterior of the locker door 20 adj a
which is adapted to register with a slot therefor in the
‘cent the free vertical margin of the door there is mounted
hub portion 47' of a circular disc driver plate 47.
an operating handle 26 having tongue portions 27 integral
It will thus be seen that manual rotation of the dial
therewith which extend through slots 28 in the face of 40
knob 33 is elfective, through the notched plate 42 carried
the door 20 and are secured to the latching bar 22. Con
fast thereby in a predetermined condition, to turn the cir
sequently, when the permutation lock which is applied to
cular disc driver plate 47 because the latter is positively
the locker door and which will be described hereinafter
engaged by the ?nger 46' on the notched plate.
is unlocked, the handle 26 may be lifted vertically to
Secured within the inner closed end portion of the lock
raise the latching bar 22 and disengage the shouldered 45
casing 30 is a retaining back plate 48, shown in detail in
slot 23 from the ‘latching dog 24, whereby the locker
FIG. 10, and to which is a?ixed one end portion of a
door is free to be swung to open position.
shouldered post 49 (see FIG. 3). Coaxially mounted for
The improved permutation lock is indicated generally
by the numeral 29 and it is mounted on a face of the locker
rotation on said post are a plurality of tumbler discs 50
door 20 adjacent the \free vertical margin of the door, 50 of the type Well known in the permutation lock art and
which are separated by Washers or spacers 51. Face por
above the latching handle 26, as shown in FIGS. 1 and 2.
tions of said tumbler discs 5%? also carry laterally pro
Portions of the lock extend through an opening therefor
truding lugs 52 (see FIG. 14) engageable with portions
in the locker door 20 and the lock casing 30 is actually
of adjacent discs whereby all of the tumbler discs are in
adjacent the inner face of the door 20 and carries mecha
nism to be described hereinafter which controls the lock 55 terconnected to rotate with one another upon the turning
of the dialing knob 33 to move the tumbler discs to cer
bolt 31 which projects through a slot 32 in the locker
tain predetermined positions when the preselected com
door latching bar 22 to block or permit vertical recipro
bination is dialed to open the lock. As is well known,
cation of the locker door latching bar 22, according to
when the discs have been properly turned, the notches 53
the position of the lock bolt 31 relative to the upper or
lower ends of the elongated slot 32, the lock bolt 31 being 60 are all brought into a position of registration or coinci
dence, as in FIG. 6, for the purpose hereinafter to ‘be set
reciprocable vertically within said slot 32, all as will
forth.
appear hereinafter.
The permutation lock 29 per se includes a knurled knob
The front wall of the lock. casing 30 is provided with
33 which projects outwardly from the outer face of the
an elongated vertically extending slot 54 (see FIGS. 5 to
locker door 20. Integral with the dialing knob 33 is a 65 9 inclusive) in which there is vertically reciprocally
graduated dial 34, the periphery of which has an annular
mounted the locking bolt 31 previously mentioned, which
?ange 35 and rotatably fits into an annular groove on in
lock bolt projects laterally of the front end of the lock
the outwardly o?set head portion of an escutcheon plate
.casing 30 but carries interiorly of the lock casing a pair of
spaced apart transverse integral bars 56 and 57 providing
37. The latter is preferably shaped as shown in FIG. 4.
Within the shell of the escutcheon plate 37 and covered 70 a space therebetween with curved cam surfaces 58 being
formed at the upper and lower ends of said space between
by the decorative overlay of the escutcheon plate is a dial
the adjacent faces of the transverse bars 56 and 57. Ver
retaining plate 38 having a pair of upper and lower open
tically reciprocally mounted within the forward end of
ings therein for the shank portions of securing bolts 39
the lock casing 36 is a lever retaining bar 55 which has
whose heads are covered by the outer shell of the
escutcheon plate 37, as shown in FIG. -3. This ar~ 75 its inner vertical margin formed with a U-shaped recess
5
3,023,600
59 and which also has on a lower face portion a pin 6%)
projecting at right angles to the plane of the lever retain
ing bar 55. The base portion of a Z-shaped tumbler disc
lever 61 is pivotally mounted on said pin 60 and the free
upper inner end portion or nose 61' of said tumbler disc
lever is adapted, upon swinging movement of the lever
61, to enter the notches 53 of the tumbler discs when the
lock combination has been properly manipulated, as
shown in FIG. 6. The head portion 61” of said lever, in
the locked condition of the assemblage, is adapted to enter
into the space between the portions 56' and 57 of the bolt
31, as in FIGS. 5 and 8, but when the bolt 31 is recipro
cated and tumbler disc notches 53 are accessible to the
portion 61’ of the tumbler disc lever, the riding of in
clined portions of the lever 61 on a curved portion 58 of
the bolt 31 will rock the lever 61 in a counter clockwise
direction relative to FIGS. 5, 6, 7 and 8, as is ‘best shown
6
assigned combination whereby it will be impossible for
a person to then read the correct last number on the dial
which was responsible for the opening of the lock.
The combined action of ‘lowering the locker door
handle 26 plus the expansive force of the spring 62 recip
rocates the lock bolt 31 and the parts associated therewith
downwardly so that the position of FIG. 8 then attains.
As said bolt 31 moves downwardly under the force of
the spring 32 the lower transverse bar portion 57 of the
bolt will strike the shoulder 70 on the tumbler disc lever
63 and rock said lever to its straightened ventical posi
tion with its nose portion 61’ clear of the notches in the
tumbler discs. When the bolt 31 and lever retaining
bar 55 reach their full down positions the spring 66
forces the locking slide 65 toward the right relative to
FIG. 7 to again enter the portion 65' of the locking
slide into the U-shaped recess 59 of the lever retaining
bar 55 which automatically locks the lock so that all in
in FIGS. 6 and 7. Upward reciprocation of the lock bolt
31 is normally yieldingly restrained by a spring 62 whose
ternal parts are returned to their normal locked posi
intermediate coiled portion engages a post 63 projecting 20 tions, as shown in FIG. 5. If the locker door 20 is
from an inner face portion of the retaining "back plate 48.
subsequently closed, it automatically latches and the
Outer ends of the arms of the spring 62 bear respectively
lock is set in its locking condition so that it is unneces
against an inner wall portion of the lock casing 3-0 and a
sary for the operator to turn the dial to effect complete
top surface portion of the bolt bar 56.
locking.
From the description thus far given, it will be ap
The coiled spring 71 shown in FIGS. 3 and 13, being
parent that when the dialing knob 33‘ is manually turned
con?ned, bears against the circular disc driver plate 47
to the correct, pre-selected combination, all of the turn
so as to maintain the parts, controlled by the knob 33 in
bler discs 50 will have been turned so that their notches
proper engagement and registration.
53 are all in a position of coincidence adjacent the nose
In FIG. 9 there is shown the lock casing 30' reversed
portion 61’ of the tumbler disc lever 61, as is shown in
over that shown in the other views and which is adaptable
FIG. 6. Then by lifting the locker door latch handle
to a locker door adapted to open in a direction opposite
26 upwardly which raises the latching bar 22 against
to that shown in FIGS. 1 and 2.
the tension of a coiled spring 64, the lock bolt 31, be
The side of the lock casing 30 which, in installed con
cause it is then engaged by the stock at the lower end
dition, is adjacent the locker door 20 is, in the normally
of the slot 32, is raised, and during this lifting movement
closed condition covered by a lock case cover plate 73
an angled portion of the tumbler disc lever 61 rides on
shown in detail in FIG. 11 and also in FIG. 3. This
the lower curved cam surface 53 formed on the portion
57 of the lock bolt 31, causing said tumbler disc lever
61 to pivot slightly in a counterclockwise direction rela
tive to FIG. 6 and enter into and engage the registering
notches 53 in the tumbler discs. Simultaneously, an inner
portion of the nose 61’ of said lever will engage the ad
cover plate has an eccentric shape to conform to the
parts with which it is associated and has a central open
ing 74 surrounded by a collar 74’ to receive the hub
portion 47' of the circular disc driver plate 47. Said
cover plate 73 has a snap fit over the front of the lock
casing 30 and carries an inwardly projecting shouldered
plate '75 whose plane is at right angles to the plane of
slide 65 (see FTG. 15) which is housed below or inward
the cover 73 and whose leg portions 75’ straddle and
ly of the retaining back plate 48‘ and which has a forward
con?ne portions of the mechanism within the look casing.
lug portion 65’ which projects through a slot therefor 45 Upper and lower portions of the cover plate 73 are also
in the front of the back retaining plate 48 and which is
formed with bolt openings 41' to accommodate the at
normally adapted to lodge in the U-shaped recess 59
taching bolts 39’.
in the lever retaining bar 55. Said locking slide 65 is
The lock case 30 is formed in one piece with a rounded
normally yieldingly retained in its projected position by
end portion to compactly house the internal mechanism
a coiled spring 66 which is housed within an opening 67
including the locking bolt 3]., disc lever 61, lever retain“
therefor in the plate 48 and which has one end carried
ing bar 55, and locking slide 65, which are preferably
by a protruberance 68 on the wall portion of said open
formed of steel or brass and plated for rust~proo?ng to
ing 67 and its other- end portion engages an outwardly
make the same long lasting. The pre-arranged notched
struck flange 69 on the inner end of the locking slide 65.
plate 42 is turned by the knob 33» because of the ?nger
The midportion of said locking slide 65 is formed with 55 46 which connects with the circular disc driver plate 47
an ovate opening 72 which accommodates the post 49
which, in turn, is connected with the tumbler discs where
relative to which said slide may reciprocate.
by when the dialing knob is turned the tumbler discs
jacent end portion of a reciprocatably mounted locking
As the locker handle 26 and the latching bar 22 are
are rotated. When the correct combination is dialed,
additionally raised over the position of FIG. 6, the lock
the locking slide lever and bolt are released to unlock
60
bolt 31 and the lever retaining bar 55 and tumbler disc
the door.
lever 61 also move upwardly additionally and compress
The improved permutation lock is designed so that it
the spring 62, as shown in FIG. 7. During this upward
will thwart the effort of an unauthorized person or thief
movement the nose portion 61' of the lever 61 remains
to gain entry into the locker iby exerting undue force on
for a short portion of its travel in engagement with the
the locker handle in an attempt to break or jam the in
65
notches 53 of the tumbler discs and therefore advances
ternal lock parts to release the bolt, or by an attempt to
the discs slightly to a point where the nose 61' of the
pick or feel out the correct combination by continuous
lever 61 may slip out of said tumbler disc notches. With
rotation of the lock dial. This is because the internal
the locker door handle 26 raised, which disengages the
parts within the lock case are so arranged, positioned and
notched portion of the locking bar 22. from the latch dog
70 constructed, that their movements, although inter-related,
24, the locker door may be readily opened. The open
are in two diiferent planes and directions. The internal
ing action of the locker door, moving the tumbler discs
parts of the lock, in their normal locked position, cannot
from the correctly dialed position of FIG. 6 to the ad
be unauthorizedly manipulated because of the rectilinear
vanced position of FIG. 7, results in moving the visible
projection of the locking slide which engages ‘at right
and graduated dial 34 away from the last number of the
angles the recess in the lever retaining plate, thereby
3,023,600
7
preventing or blocking said lever retaining plate 55 and
the tumbler disc lever and locking bolt from moving
vertically upwardly should ‘an unauthorized person exert
unnecessary forces or pressure on the locker handle, try
ing to jam open the lock, without dialing. The disc lever
61 swings in a plane opposite to the line of movement
8
meat of the same when the lever is disengaged from the
tumbler disc notches.
2. A combination lock comprising, a lock casing, a
latching bar reciprocally mounted relative to the casing,
a lock bolt reciprocally mounted through the casing and
engaging the latching bar to control reciprocation of the
latter, a post mounted within the casing, a plurality of
of the lock bolt 31 and the lever :is so arranged and posi
notched tumbler discs coaxially mounted on the post for
tioned that it will not move by itself nor fall into the
rotation thereon, a tumbler disc driver plate rotatably
notches of the tumbler discs if by chance the correct com
10 mounted on the post, the disc driver plate and tumbler
bination is dialed by an unauthorized person.
Should a thief exert undue pressure on the lock
discs being interconnected for joint turning movement,
a manually operable knob extending externally of the
casing, a combination setting plate adjustably ?xed to
upwardly due to the re-ctilineal projection of the locking
casing at right angles to the path of movement of the lever
locked position, notwithstanding the undue force applied.
latching bar reciprocally mounted exteriorly of the cas
ing, a lock bolt reciprocally mounted through the casing
for movement parallel to the latching bar and engaging
the latter to control reciprocation thereof, a post mounted
fast within the casing perpendicular to the line of move
The foregoing may be best understood by referring to
FIG. 5 wherein the lock is in ‘its normal locked condi
tion.
said knob and connected with the disc driver plate to
or handle, resistance to raising or moving the lock bolt
31 results from the bolt then trying to swing the lever 61 15 transmit turning movement from the knob to the tumbler
discs, a lever retaining bar reciprocally mounted in the
into the notches of the tumbler discs 50 whose notches
casing to move in a plane parallel to the plane of move
are in an upset arrangement. Since the lever 61 cannot
ment of the latching bar and transverse to the ‘axis of the
then rock into the disc notches 53, the pressure unauthor
post, a lever pivotally mounted on said lever retaining
izedly applied to the locker handle 26 is transferred to a
vertical force reacting upwardly against the bolt and 20 bar and having a nose portion engageable and disengage
able with the notches of the tumbler discs and also en
lever 61. However, the lever transfers this attempted
gageable with the bolt to transmit movement thereto, and
vertical movement to the lever retainer plate 55 through
a locking slide yieldingly reciprocally mounted in the
the pivot pin 60 but the lever retainer plate cannot move
slide 65 into the recess 59 of the lever retainer plate which 25 retaining bar and releasably engageable with the latter.
3. A combination lock comprising, a lock casing, a
holds the latter ?rmly in place and maintains all parts in
The ‘lever 61 is not under spring tension but is operated by
a mechanical movement so, if by chance the correct com
bination should be dialed, there would be no automatic
spring-urged snap imparted to the lever and the lever will
not move into the disc recesses nor will the locking bolt
move by itself.
Moreover, the outermost tumbler disc 50 shown in
FIG. 14 has, because of the safety factor described, small
notches or serrations 76 formed in its periphery. If un
authorized force is applied to turn the lever 61 into the
normal notches 53 of the discs ‘and said notches are in
an upset position and not alined, the nose 61' of the lever
61 will instead drop into one of the peripheral serrations
76 of the outermost disc 50 and this will block or restrict
further rotation of the dialing knob 33. This action will
prevent the lock from being “picked” by feeling out the
correct combination.
The improved permutation ‘locker lock besides being of
simple construction and easy to assemble, has the various
safety factors previously indicated and is, additionally,
ment of the bolt, a plurality of notched tumbler discs co
axially mounted on the post for rotation thereon, a tum
bler disc driver plate rotatably mounted on the post co
axially with said tumbler discs, the disc driver plate and
tumbler discs being interconnected for joint turning move
ment, a manually operable knob extending externally of
the casing and connected with the disc driver plate to
turn the same, a lever retaining bar reciprocally mounted
in the casing to move in a plane parallel to the plane of
movement of the latching bar and transverse to the axis of
the post, a lever pivotally mounted on said lever retaining
bar and having a nose portion engageable and disengage
able With the notches in the tumbler discs and engageable
with the lock ‘bolt to cause the latter to reciprocate with
the lever retaining bar, spring means yieldingly resisting
joint movement in one direction of the bolt, the lever re
taining bar and the lever, and a locking slide yieldingly
self-locking when the locker door is closed and latched,
reciprocally mounted in the casing at right angles to the
and upsets the position of the last dialing graduation to
prevent unauthorized detection. The lock is further 50 path of movement of the lever retaining bar and releas
ably engageable with the latter to block movement of the
more well adapted for the purposes described.
What is claimed as the invention is:
1. A combination lock comprising, a lock casing, a
latching bar reciprocally mounted relative to the casing,
same when the lever is disengaged from the tumbler disc
notches.
4. A combination lock comprising, a lock casing, a
a lock bolt reciprocally mounted in the casing and engag 55 latching bar reciprocally mounted exteriorly of the eas
ing the latching bar to control reciprocation of the latter,
a post mounted within the casing, a plurality of notched
tumbler discs coaxially mounted on the post for rotation
thereon, a tumbler disc driver plate rotatably mounted on
i-ng, a lock bolt reciprocally mounted through the casing
for movement parallel to the latching bar and engaging
the latter to control reciprocation thereof, a plurality of
superimposed notched tumbler discs rotatable within the
the post coaxially with said tumbler discs, the disc driver 60 casing on an axis perpendicular to the path of movement
of the bolt, means for turning said discs to a predeter
plate and tumbler discs being interconnected for joint
mined position wherein their notches are in registration,
turning movement, a manually operable knob extending
a lever retaining bar reciprocally mounted in the casing to
externally of the casing and connected with the disc driver
move in a plane parallel to the plane of movement of the
plate to turn the same, a lever retaining bar reciprocally
65 latching bar, a lever pivotally mounted on said lever re
mounted in the casing to move in a plane parallel to the
taining bar and having a nose portion engageable and dis
plane of movement of the latching bar and transverse to
engageable with the notches of the tumbler discs when
the axis of the post, a lever pivotally mounted on said
they are in the predetermined position of registration, and
lever retaining bar and having a nose portion engageable
also engageable with the bolt, and a locking slide yield
and disengageable with the notches in the tumbler discs 70 ingly reciprocally mounted in the casing at right angles to
the path of movement of the lever retaining bar and nor
and engageable with the lock bolt to cause the latter to
mally engaging the latter to prevent movement of the re
reciprocate with the lever retaining bar, and a ‘locking
slide yieldingly reciprocally mounted in the casing at right
angles to the path of movement of the lever retaining bar
and releasably engageable with the latter to block move 75
taining bar and bolt, but being released when the lever
nose swings to a tumbler disc notch engaging position.
5. A combination lock comprising, a lock casing, a
3,023,600
door latching bar reciprocally mounted exteriorly of the
casing, a unitary lock bolt reciprocally mounted through
the casing for movement parallel to the latching bar and
engaging the latter to control reciprocation thereof, a
plurality of superimposed notched tumbler discs rotatable
within the casing on an axis perpendicular to the path of
movement of the bolt, means for turning said tumbler
discs to a predetermined position wherein their notches are
in registration, and a lock bolt movement controlling as
10
means restraining movement of said retaining bar in one
direction, a locking slide extending at right angles to the
line of movement of the retaining bar and releasably en
gaging said reciprocal retaining bar to prevent movement
thereof, said locking slide being released by pivotal move
ments of said pivotal lever dog, and a spring yieldingly re
straining movement of said locking slide in one direction.
9. In a permutation lock including a slotted case and a
bolt reciprocally projecting through said case slot, 21 plu
semblage operatively mounted within the casing and hav 10 rality of co-axially mounted rotatable notched tumbler
ing pivotal lever means engaging said bolt and moved by ‘ discs, and means interposed between said tumbler discs
reciprocations thereof imparted by the latching bar to
and the bolt for controlling reciprocation of the latter,
project into said tumbler disc notches when the same are
comprising a bar within the case and reciprocable in a path
in registration in a predetermined position.
parallel to the path of movement of the bolt, a yieldingly
6. A combination lock comprising, a lock casing, a 15 releasable slide engageable with said bar to block recip~
door latching bar reciprocally mounted exteriorly of the
rocation thereof, and a nosed lever pivotably carried by
casing, a unitary lock bolt reciprocally mounted through
said bar and swingable into a position to engage and re
the casing for movement parallel to the latching bar and
lease said slide when the tumbler discs have their notches
engaging the latter to control reciprocation thereof, a plu
alined with the nose of said lever and the same is pivotably
rality of superimposed notched tumbler discs rotatable 20 moved to engage therein.
within the casing on an axis perpendicular to the path of
movement of the bolt, means for turning said tumbler
discs to a predetermined position wherein their notches are
in registration, a lock bolt movement controlling assem
10. In a hingedly mounted door for an enclosure, the
door carrying a reciprocable latching bar and a permuta
tion lock casing thereadjacent, a lock bolt reciprocally
mounted through the casing and having a locked posi
blage operatively mounted within the casing and having 25 tion in engagement with said latching bar to prevent re—
pivotal means projectable into said tumbler disc notches
when the same are in registration in a predetermined posi
tion whereby the lock bolt is free to reciprocate upon re
ciprocation thereof, a plurality of rotatable co-axial tum
bler discs within the lock casing, means extending exte
ciprocation of the door latching bar, and further having
discs to a predetermined position wherein the notches are
riorly of the casing for manually turning said tumbler
a portion engaging the lock bolt to reciprocate therewith, 30 in registration, and a control assemblage within the eas
and locking means releasably engaging said reciprocal lock
ing including a reciprocating bar engaging said lock bolt
bolt engaging portion, said locking means being engaged,
to reciprocate therewith, a reciprocal, yieldingly mounted
operated and controlled by pivotal movements of said
locking slide releasably engaging said reciprocating bar to
pivotal means toward and away from its tumbler disc
block movement thereof, and a lever dog pivotally mount
notch engaging position.
35 ed on said reciprocating bar, said lever dog being pro
7. A combination lock comprising, a lock casing, a
jectable into said tumbler disc notches when the same are
door latching bar reciprocally mounted exteriorly of the
in registration in a predetermined position in which posi
casing, a unitary lock bolt reciprocally mounted through
tion said lever dog retracts the locking slide from the
the casing for movement parallel to the latching bar and
reciprocating bar permitting the latching bar to be moved
engaging the latter to control reciprocation thereof, a
in a rectilinear path to also move said lock bolt, the move
plurality of superimposed notched tumbler discs rotatable
ment of the latter moving said reciprocating bar and the
within the casing on an axis perpendicular to the path
latch dog with the latter turning said tumbler discs beyond
of movement of the bolt, means for turning said tumbler
their predetermined positions to “upset” the same.
discs to a predetermined position wherein their notches
11. In a hingedly mounted door for an enclosure, the
are in registration, an articulated lock bolt movement con 45 door carrying a reciprocable latching bar engageable
trolling assemblage operatively mounted within the casing
and disengageable with a latch dog ?xedly mounted on the
and having a pivotal lever projectable into said tumbler
enclosure and a permutation lock casing on the door ad
disc notches when the same are in registration in a pre
jacent the latching bar, a lock bolt reciprocally mounted
determined position whereby the lock bolt is free to recip
through the casing and having a locked position in engage
rocate upon reciprocation of the door latching bar, a lever 50 ment with said latching bar to prevent reciprocation there~
retaining bar engaging the lock bolt to reciprocate there
of and an unlocked position, a plurality of rotatable co
with and having said lever pivotally mounted thereon,
axial tumbler discs within the lock casing, a graduated dial
means yieldingly restraining movement of said latte-r mem
and knob mounted on the door exteriorly of the casing
ber in one direction, locking means releasably engaging
for manually turning said tumbler discs according to a
said lever retaining bar, and means yieldingly urging said 55 combination to a predetermined position wherein the
locking means toward its engaging position.
notches are in registration, and a control assemblage with
8. A combination lock comprising, a one-piece look
in the casing including a yieldingly mounted reciprocating
casing, a door latching bar reciprocally mounted exte
bar engaging said lock bolt to reciprocate therewith, a
riorly of the casing, a lock bolt reciprocally mounted
reciprocal, yieldingly mounted locking slide releasably en
through the casing for movement parallel to the latching 60 gaging said reciprocating bar to block movement thereof,
bar and engaging the latter to control reciprocation there
and a lever dog pivotally mounted on said reciprocating
of, a plurality of superimposed notched tumbler discs ro~
bar, said lever dog being projectable into said tumbler
tatable within the casing on an axis perpendicular to the
disc notches when the same are in registration in a pre
path of movement of the bolt, means extending exterior
determined dialed position in which position said lever
1y of the casing for manually turning said tumbler discs 65 dog retracts the locking slide from the reciprocating bar
to a predetermined position wherein their notches are in
permitting the latching bar to be moved in a rectilinear
registration, an articulated lock bolt movement controlling
path in one direction to also move said lock bolt to its un
assemblage operatively mounted Within the casing and
locked position, the movement of the latter moving said
associated with the lock bolt and the tumber discs, said
reciprocating bar and the latch dog with the latter turn
assemblage including a pivotal lever dog projectable into 70 ing said tumbler discs beyond their predetermined posi
said tumbler disc notches when the same are in registra
tions to “upset” the same, a reverse movement of the
tion in a predetermined position whereby the lock bolt is
free to reciprocateupon reciprocation of the door latching
bar, a lever dog retaining bar engaging the lock bolt to
latching bar automatically returning the lock bolt to its
locked position.
12. A combination lock comprising, a lock casing, a
reciprocate therewith and carrying said lever dog, yielding 75 latching bar reciprocally mounted exteriorly of the cas
3,028,600
11
12
ing, a lock bolt reciprocally mounted through the casing
for movement parallel to the latching bar and engaging
the latter to control reciprocation thereof, a plurality of
superimposed notched tumbler discs rotatable within the
plurality of rotatable notched tumbler discs Within the
.lock, the improvement which comprises: means between
the reciprocable latching bar and the tumbler discs for
simultaneously “upsetting” all of the latter upon recipro
casing on an axis perpendicular to the path of movement
of the bolt, one of said tumbler discs having a serrated
from the latch dog but leaving the notches of all of the
periphery, graduated dial means for manually turning said
discs in mutual registration, said means including a re
cation of the latching bar in a direction to disengage it
ciprocable lock bolt movable into engagement with
discs to a predetermined position wherein their notches
said latching bar to prevent reciprocation thereof, a re
are in registration, a lever retaining bar reciprocally
mounted in the casing to move in a plane parallel to the 10 ciprocable support bar engaging said lock bolt to re
ciprocate therewith, movable means releasably engagea
plane of movement of the latching bar, a lever dog pivot
ble with said reciprocable support bar to block move
ally mounted on said lever retaining bar and having a
ment thereof, and a lever dog pivotally supported on said
nose portion engageable and disengageable with the
support bar and controlling said movable means, said
notches of the tumbler discs when they are in the pre
determined position of registration, and also engageable
with the bolt, and a locking slide yieldingly reciprocally
mounted in the casing at right angles to the path of move
ment of the lever retaining bar and normally engaging
lever dog being projectable into said tumbler disc notches
when the same are in registration in a predetermined po
sition and also releasing said movable member from en
gagement with the support bar, movement of the latching
bar in a rectilinear path carrying ‘therewith said lock bolt
the latter to prevent movement of the retaining bar and
bolt, but being released when the lever nose swings to a 20 and thereby moving said support bar and the latch dog
thereon whereby the latch dog, in engagement with the
tumbler disc notch engaging position, movement im
notches on the tumbler discs, turns the same beyond their
parted to the lever dog through the lever retaining bar and
predetermined positions ‘to “upset” the same.
lock bolt when force is applied to the latching bar
when the tumbler discs are not in the predetermined po
References Cited in the ?le of this patent
sition of notch registration, causing said lever dog to en 25
gage a peripheral serration on said tumbler disc to block
UNITED STATES PATENTS
unauthorized movement of said block mechanism.
1,902,214
Buettner et a1 _________ _._ Mar. 21, 1933
13. In a door and permutation lock'assemblage which
includes a reciprocable latching bar engageable and
disengageable with a ?xedly mounted latch dog, and a 30
2,112,982
2,357,305
Brauning _____________ __ Apr. 5, 1938
Barrett _______________ __ Sept. 5, 1944
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