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Патент USA US2118478

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‘May 24, 1933-
M. SCHNUR
2,113,473
COMBINATION LOCK
Filed Apfil 9, 1957
‘
4 Sheets-Sheet 1
3
512
294
Lil-6
May 24, 1938.
I
M. SCHNUR
.4
2,118,478
COMBINATION LOCK
Filed April 9, 1937
‘
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_
4 Sheets-Sheet 2
May 24, 1938.
'
M. SCHNUR
COMBINATION
LOCK
Filed April 9, 1937
Zia
196 "
‘
5
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‘
2,118,473
.
I
4 Sheets-Sheet 5
May 24, 1938.
2,118,478‘
M. SCHNUR I
'
COMBINATION LOCK_
4 Sheets-Sheet
Fiied April 9, 1957
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Mp4
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9.64164, gin/75¢; {an 59' j
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Patented May 24, 1938
2,il8,478
er OFFICE
warren STATES
2,118,478‘
COIWBINATION LOCK
Mathew Schnur, Chicago, Ill.
Application April 9, 1937, Serial No. 135,993
15 Claims.
(01. 70-299)
My invention relates to combination locks, and
more particularly to the type carried by safe
vaults;
cabinets, safes and vaults, and one of- my ob
jects is to build the novel combination lock in
the said arrangement; and
the door of the cabinet or safe in a manner to
leave the exterior of such door flush or smooth
in all respects.
A further object of the invention is to so con
stitute the novel lock that its controls need not
:10 be read, but may be operated in partial or even
complete darkness.
,
.
A still further object of the invention‘ is to
have the controls of the novel look so inconspic
uous from the outside that the door of the cabi
net or safe and the controls may be painted, dec
dering the novel lock applicable to large safes and
Fig. l2-is an enlarged detail of a mechanism in
Fig. 13 is a section on the line l3-l3 of Fig. 12. ,5
Safes or safe cabinets as generally known are
identi?ed by the ‘1 conventional handle and dial
knob on the door, the dial being for visual refer
ence to operate the combination, and the han
dle to withdraw the latch or bolts and open the 10
door. Obviously, light is necessary in order that
the ?gures may be read on the dial, and in places '
which are partly or totally dark arti?cial light
must be provided for this purpose. Also, the dial
knob and handle project from the door so as to 15
orated or otherwise marked in harmony with the
make it conspicuous that a safe or safe cabinet
surrounding wall, whereby to make the door and
its controls ordinarily unnoticeable.
is located at the particular site. Often a picture,
drape or other household furnishing is placed in
front of a wall safe cabinet in order to conceal
the same, but the article must be removed or 20
pushed aside in order to gain approach to the
safe; also, it is frequently inconvenient to pro
vide daylight or arti?cial light in an instance of
this kind. It has therefore been my intention to
devise a lock which is practically invisible from 25
the outside yet permits the controls to be op
erated with free access and irrespective of light
conditions.
In accordance with the foregoing, speci?c ref
Another object of the invention is to devise a
novel type of controls for the combination lock
in the form of push buttons, which may be op
erated with ease and in a predetermined order
and sequence in order to open the lock.
'
An additional object of the invention is to pro
?25 vide a set of three controls for the operation of
master, combination, and door releasing move
ments.
An important object of the invention is to pro
vide a mechanism for the novel lock which is
3'.) entirely contained in the door of the cabinet or
safe and has all the requisites of the standard
combination as well as other features of advan
tage and utility.
With the above objects in view, and any others
.35 which may suggest themselves from the descrip
tion to follow, a better understanding of the in
vention may be had by reference to the accom
panying drawings, in which
Fig. l is an external view of a wall safe cabinet
to equipped with the novel combination lock;
Fig. 2 is a plan section of the cabinet showing
the door in elevation as closed, and in dotted
lines as open;
'
Fig. 3 is an enlarged section of the safe cabinet
W5 showing the inner side of the door with the mech
anism in locked position;
Fig. 4 is a view similar to Fig. 3, showing the
combination solved and the mechanism set for
the opening movements;
.
Fig. 5 is another similar view, showing the
mechanism as situated when the door is released
for opening;
,
Figs. 6 to 10 are respectively, sections on the
lines 5-45 to l€3—iil of Fig. 3;
. Fig. 11 is an elevation of an arrangement ren
erence to the drawings indicates a safe cabinet of 30
the wall type at 20, and a door for the same at
V2!, the door being hinged to the cabinet at one
side as indicated at 22. The cabinet opening
has a keeper ?ange 23 for‘ a slidable latch-bolt
24 in the center of the door, and when the mech- 35
anism carried by the door is caused to withdraw
the latch-bolt 24 the door—because it has no
handle or projecting part on the outside-is
pushed open by a spring ?nger 23a carried inside
the keeper'?ange 23 and directed against the in- 40
her side of the door, whereby to automatically
push the door ajar as soon as the latch-bolt ‘24 is
withdrawn. As seen from the inside, the mech
anism in the door is enclosed by a cover plate
25 which is placed upon a rim ?ange 2 la project- 45
ing inwardly from the door, the cover plate being
secured to the latter by screws 25a or other suit
able means. As seen from the outside, the door
has an upper button A as master control, a lower
button B as the combination control, and a third 50
button C as the door release control. The but
tons A and B are near the opening edge of the
door, while the button C is near the hinge edge
thereof.
7
'
‘
Primarily, it is the operator’s function to push ~55
2,118,478
the buttons A and B a predetermined number of
times in a prescribed relation, in accordance with
a given combination of numbers. Thus, the com
bination may read B—6 (meaning the button B
6 times), A—-5 (meaning the button A 5 times),
B—3, A-3, B-—l3, etc. When‘the combination
has been followed and completed, a single push
of the button C procures the withdrawal of the
, latch-bolt 253 and the consequent automatic open
tied to a pin 43A carried. by the left-hand end
of the slide bar SlA.
by a check-pawl MA which is pivoted on a cross
shaft 45 carried in extensions 3% of the bearing
30. The check-pawl MA has an outward lug ex
tension 45A which is drawn by means of a spring
45A to the stationary bracket 43. The check
pawl is thus held in engagement with the ratchet
10 ing of the door. This is followed by the return
of the latch-bolt to its extended position and the
restoration of the combination mechanism to
its original state.
This is actually a locked con
dition after the door is pushed closed to trip the
latch-bolt over the keeper, indicating that no
other operation is necessary to lock the safe. On
the other hand, should the operator make an er
ror in the manipulation of the buttons A and B
and stop either at the end of the series of im
20 pulses or at a time prior thereto, the actuation
of the button 0 will not bring about the with
drawal of the latch-bolt 24, but will in each in
stance re—set the combination into the original
locked state.
25
Also, the recession of the
slide-bar from the shifted position is stopped
_
In describing the instrumentalities entering
into the operation of the novel lock it is noted
that each of the push-buttons is in the form of a
plunger which operates in a cup 26 which is iso
lated from the general mechanism of the lock, so
30 that a tool inserted by an unauthorized person
with the intention of prying out the button and
tampering with the combination will extend no
further than the interior of the cup. The lat
ter is, however,v slotted at one side as indicated
35 at 260. (see Fig. 7) to permit a hook 2? to enter
the cup behind the button, the hook having a
formations of the slide bar and maintains the 10
latter ?xedly in the position to which shifted.
The rod 293B, while in line with the rod 29A, is
independent therefrom. It receives a pawl 37B
slidably in order to make it possible to place the
pawl opposite any one of the slide bars 32B, 3313 15
etc, in order to actuate the corresponding ratchet
portion thereof. The pawl BIB also has the out
standing lug 38B, draw-wire 39B and ?nal spring
ii?B to the door bracket 4|, all for the same pur
pose in respect to the slide bar 32B as in the in
20
stance previously described. Likewise, check
pawls, springs for them, and slide bar springs are
provided for the slide bars 33B, 343 etc. precisely
similar to the previously described corresponding
parts 44A, 45A and AEA, respectively. Thus,‘each 25
of the slide bars is independently spring-drawn
toward the right-as seen in Fig. 3—and checked.
While the mechanism in ‘connection with the
button A indicates the manner of imparting a
succession of leftward shifting strokes to the slide 30
bar 35A with each push of the button, the other
slide bars are not in any way affected until the
button B is pushed, and then onlyin accordance
with the position at which the pawl 37B is located.
Thus, this pawl is initially opposite the slide bar 35
32B, and serves to propel the same when the but~
However, when the pawl is
lowered to a position opposite the slide bar' 33B,
then only such slide bar will be propelled when
40
the button B is again actuated.
In order to shift the pawl 313 from the initial
position to‘ the next position down, a mechanism
base 21a which is rockably mounted on a shaft 28 ‘ ton B is actuated.
carried by a door-bearing 29. The sides of each
hook base project from the latter as indicated
at 2% to carry between them a rod 29A for the
button A, arod 29B for the button B and a rod
2&0 forthe button C.
A short distance below the zone of the button
A, the door carries ?xed guides 30 and 3%. for the
horizontal operation of a set of slide bars which
are in closely grouped vertical relation. The top
bar is related to the push button A and is there
fore numbered EIA; and the rest of the bars are
related to the push-button B and are therefore
50 numbered 32B, 33B, etc. in downward direction.
It is seen that, while the slide bars just re
ferred to are plain in the regions toward the left—
as seen in Fig. 3—they are cut with ratchet teeth
83 at the right, and it is the province of the but
55 tons A and B to impart short leftward strokes
to the related bars through the medium of pawls
for the ratchet formations each time the buttons
are pushed.
,
In accordance with the plan just mentioned, it
.60 is seen that'the rod 29A is downwardly extended
to freely receive a pawl 31A which is'directed to
the ratchet formation 33 of the slide bar MA.
The pawl is held in this engagement by having
a lug 38A projecting from it drawn toward the
65 left by a wire 33A which includes a spring‘ MA:
whose remote end is connected to a bracket 4!
carried by the door. It is now seen that the
pushing action of the button A rocks the shaft 28
and throws the rod 29A leftward, against the
tension of a spring 3%‘ whereby to operate the
pawl and move the slide bar 3IA a given, dis
tance toward the left. This movement is re
sisted by a light spring 42A whose rear end is at
tached to a stationary bracket I23 carried by the
bearing 38a, the other end of the spring being
originating from the slide ' bar 3lA goes into
action. As seen in Fig. 3, the slide bar SIA re
ceives a vertical plate 59 which has an inclined 45
cam formation 5% on its upper edge to control
the left-hand portion of a follower 5i pivoted at
5Ia. in a door-bracket 52 to rock in a vertical
plane. In the right-hand portion of the door-as
seen in Fig. 3—is a bearing 53 for a vertical slide 50
til which’ has a pin 54a projecting from its upper
end into a slot 5|?) made in the right-hand end
portion of the follower 5i. Thus,,as the cam
plate 59 is moved step by step toward the left
when't'ne button A is pushed, the rise of the cam 55
59a rocks the follower 5! to depress the slide 54
in accordance with the design of the cam. The
slide Eli-is drawn upwardly by a spring 5% in
order to maintain the follower 5! in contact with
the profile of the cam. The lug 38B of the pawl 60
Bl’B receives a forked extension 540 of the slide
whereby to make the pawl shiftable in accord- '
ance with the movement of the slide.
It will now beapparent that the operation of
the push buttons'may be calculated by numbers 65
of strokes as well as predetermined selection of
and relation between the buttons to effect the
respective movements of the slide bars in accord
ance with a given calculation or. combination.
Thus, each of the slide bars is cut with a facial
recess D at a predetermined point, and it may
be assumed that a given combination is solved
when the recesses D of all the slide bars. come
into line._ A combination such as the one sug
gested on a previous page may thus be worked
3
2,118,478
out as follows, the combination being 'B-t, A—5,
B—3, A—3, B—l3, etc. Pushing the button B six
times will advance the slide bar 32B six steps to
the left. Next, pushing the button A five times
will advance the ‘slide bar 31A ?ve steps. How
ever, this movement‘ ‘is accompanied ‘by the rise
of the cam 51') to lower the pawl 37113 to a position
where it is now opposite the slide bar 33313. The
next order in the combination is to push the
button B three times, which operates to shift
the slide bar 3313 accordingly. The operation of
the ‘combination may thus continue by actuating
thebuttons in alternation the required number of '
strokes, so that eventually the slide bars have
15 moved to various positions as indicated in Fig. 4,
all designed to aline the recesses D as a solution
of the combination. It must ben'oted that the
operation of the slide bars must always begin
with the button B, and not with the button A.
20 The reason for this is that actuating the button
A not only propels the slide bar 31A, but imme
diately begins to have its effect on the ‘lowering
of the pawl 31B. Therefore, the advance of the
slide bar 3 IA would "induce movements of the said
25. pawl in advance of its predetermined operative
functions. On the. other hand, if the button B
is ?rst actuated, the desired operation'or ad~
vance of the slide bar 32B will be finished before
the pawl 313 takes its position opposite the next
30 slide bar, and it is only logical that the button A
be next actuated to both advance the slide bar
31A and procure the shift of the pawl 31B.
The solution of the combination effects the re
lease of the latch-bolt 2% by ?rst controlling an
upright lever 51 which is pivoted at 51a to a
bracket 58 in the bottom of the door. The lever
is movable toward the door by the pressure of
a horizontal" arm 59, drawn toward the door by a
spring 6!}, against a rearward lug 59a of the lever.
40 ‘When the slots D of the combination solution
come into line, the lever 51 is automatically
caused to drop into them, thus assuming a po
sition closer to the door.
.
At one side of the lever 51 is a bearing til
45 carried by the door, the bearing having a shaft
Eta on which is journaled the outer end of a
crank 62. To a medial part of the crank is linked
the corresponding end of the arm 58, while the
inner part thereof seats in a cavity cut in the
shank of the latch-bolt 24. The swing of the
crank 52 operates the latch-bolt'bac'k and forth
andthe inward stroke of the same is resisted by
a spring 63', one end of the spring being attached
at 630. to the latch-bolt, and the other at 631)
55 to a; sheath in which the same is slidable. The
crank 62 meets a stop pin Bib as a limit for the
advance of the latch-bolt,
- The bar 59 is extended with a hook 6'4 hinged
at £55 to the bar, the spring 60 preferably extend-'
'ing from the hinge pintle to a pin 63a carried
by a bracket 691) secured to the door. Ordinarily,
the outward position of the lever 51 ,maintained
by the locked position of the combination slide
bars keeps‘ the hook 54 just behind the rod 29C,
' but in the event of the solution of the combina
tion and the aforesaid clearance afforded the
lever 57, the spring ‘66 acts to draw the hook for
ward over the rod-29C. Now, the pushing of the
button C will carry the rod 290 to the left—'as
seen in Fig. 5-, drawing upon the arm 59 and
in turn upon the latch-bolt 2-2 to retract the same.
From the mechanism just described, itis ap
parent that the pushing of the button C will
have no effect on the latch-bolt unless the com
bination is solved, as the hook 64 ‘will otherwise
be kept by the lever 51 from being engaged by the
rod 29C.
The push-button C also serves to clear the
combination at any time it is pressed. As orig
inally mentioned, this can either be done after
the combination has only been partially worked
and ‘an error made or anticipated, or when the
combination has been fully worked and an error
has occurred, so that the lock can be in either
case immediately cleared or're-set to original po
10
sition. This means that all the slide bars are re
turned to the originally-grouped relation-as
seen in Fig. 3—, this action being instituted by
the rod 29C. Thus, a link ‘H extends from this
rod to a central point behind the door, there to
engage the upper end of a lever '12 horizontally
pivoted at ‘T3 to a door bracket 13a. The lower end
of the lever 72 is connected by a link 14 to a medi
al point 15a, of an upright arm 15 pivoted at 15b
to a door bracket 7.50 to be swingable in parallel
ism to the door and drawn toward its hinged
side by a spring 15d. 'The upper portion of the
arm 15 is divided with a forward branch 15c and
a rear branch 15]‘. The latter occurs to the left of
the check-pawl lugs 45A and 45B, ‘While the for 25.
ward branch 156 has a lateral fork 15g opposite
the lug 38A of the pawl SEA. When the rod 29C
moves to the left in response to the push of the
button C, the lever '52 is swung in a counter
clockwise direction to push the arm 15 to the 30
right and impel the series of lugs 45A and 45B
and the pawl lugs 38A and 3813 to the right so
as to assure the release of all the pawls from the
slide bar ratchet formations,_and so permit the
slide bar springs to quickly restore them to the 35
initial position.
'
(
However, the restoring action just anticipated
cannot occur as long as the lever 51 seats in the
alined slots D of the slide ‘bars and makes the
latter‘immovable. A releasing device is therefore
provided which takes its origin from the rod 29C.
As seen in Figs. 3 and 8, the rod receives in pivot
al relation one end of a slide 75h, which has a top
lug 152', from which a drawspring ‘E57’ leads to a
door bracket 15k to both keep the slide in the po 45
sition shown and the rod 29C and button C in
their original positions. The slide 15h in its nor
mal position acts as a stop for the lever 5'|--as
seen in Fig. 8—so that the lever may not lie
against the slide bars. However, when the latter 50.
have been advanced to secure the alinement of
their slots D, the partial push of the button C will
unseat the lever 57 from the slide top and cause
the lever to drop into the slots D with one portion
and into a cavity 75m of the slide with another 55
portion. As previously outlined, the advance of
the lever allows the hook ?ll to engage the red 29C.
Now the further push of the button C will draw
both upon the bar 59 and the slide 15h. The bar
procures the latch-bolt withdrawal, while an in 60
cline 1511 on the rear end of the slide bears on the
lever 5‘? to back it out of the cavity 75m and slide
bar- slots D, and thus release the slide bars for
their restoring motions when the branches of
the arm 15 raise the pawls and check pawls away 65
from the slide bars. As the hook 64 is under the
frictional hold of the rod 29C while the button C
is being pushed, the backing action of the lever
51 as induced by the incline 15m may meet resistance in the bar 59. The latter is therefore 470
hinged to the hook at 65 to‘permit the bar to
yield, the breaking of the joint being resisted by
av leaf spring l?p extended between clips ‘i5q
formed from the aiiected parts. Thus, when the
push button 0 has been fully depressed and the
4
2,118,478
door pushed ajar by the spring 2311, the hook 6!!
and Without the necessity of any dial or instruc- V
will be pushed away from the rod 290 and the
tions being read.
lock constituents restored to original positions.
According to the present construction, the side
I claim:1. A safe having a door, a combination lock con
fork 15g of the arm branch We is of elongated
form to also form a support for the lug 38A and
so enable the pawl 37A to be freely rather than
tained in the same, master, secondary and door
release units controlled by the combination, a pair
of vertically-spaced push-buttons contained in
rigidly mounted on the rod 29A.
the door at one side representing the master and
The modi?cation of Figs. 11 to 13 shows the
10 adaptation of the above lock to larger safes or
vaults. In these a mere latch-bolt is inadequate,
and slide-bolts are usually employed. As seen in
Fig. 11, a set of laterally-movable bolts occurs at
'55 and a set of vertically-movable ones at T5.
15 These are connected by rotary disks ‘F8 to move in
unison when the disks are rotated, the master
disk having a link ‘58a to connect it with an os
cillatory lever l9 pivoted at ‘E90, to the door 80 of
the safe or vault. Such door is equipped with a
20 combination lock of the same nature as previous
ly described, but the bolt 2!; terminates with a
horizontal loop Si instead of with a latch-head.
An independent latch-bolt assembly 82 is carried
by a panel 33 mounted in the door on a pivot pin
25 M. The withdrawal of the bolt-shank 24 by op
eration of the push button C causes the loop ill
to back the latch-bolt B2 to the extent of permit
ting the panel 83 to swing out by the operation of
a spring pusher 85 carried by the door and simi
30 lar to the previous spring ?nger 23a, so that the
panel may be taken hold of by hand as indi
cated by dotted lines in Fig. 13. By this action, a
block 85 carried inside the panel swings in the
direction of the arrow in Fig. 3 to meet the lower
secondary combination controls, and a push-but
ton contained in the door at the opposite side 10
representing the door release control.
2. A combination lock comprising a master
slide bar, a set of secondary slide bars in grouped
relation with the master slide bar, means to ad
vance the latter, other means to advance any one 15
of the secondary slide bars, and a mechanism con
trolled by the master unit to selectively dispose
said other means in respect to the secondary
slide bars.
3. A combination lock comprising a top slide 20
bar, a set of slide bars below the top one, means
to advance the latter, other means movable in
downward order to positions opposite the lower
slide bars and adapted to advance either of these,
a cam carried by the top slide bar, and a follow 25
er opposite said cam and operative to depress
said other means in accordance with the pro?le
of the cam whereby'to make the selection and
advance of the lower slide bars dependent on the
progress of the cam during the advance of the
top slide bar.
4. A combination lock comprising a set of con
trols, the rock shafts operated by the controls,
slide bars having ratchet surface formations,
and a pawl actuated by each rock-shaft to en 35
gage such formations in corresponding slide bars
right and so effect the withdrawal of the door- . in order to periodically advance the latter.
5. A combination lock comprising a set of con
bolts ‘l6 and 77. Now the continued pull on the
trols, a top slide bar, a set of slide bars below the
panel will open the door.
It will be apparent from the above description top one, a rock-shaft operated by each control, 40
40
that I have provided a safe lock which has all the slide bars having ratchet surface formations,
a pawl carried by one rock-shaft and engage.
the advantages of the conventional combination
lock plus several features of special merit. As able with the ratchet formations of the top slide
has been mentioned, the lock makes it possible to bar to periodically advance the same, a pawl slid
35 portion of the lever l9, and the further pull on
the panel causes this lever to be pushed to the
45 build a safe cabinet flush with a wall and to so
blend it with the surrounding scheme as to be un
noticeable to the average observer. Besides, a
safe exterior so constituted is neat because it
does not present the usual handle and combina
50 tion knob to view. The lock is of course capable
of a large variety of combinations by the simple
alteration of or addition to the set of slide bars
and the change of the master cam pro?le to suit.
As has been noted, all the operating parts are
55
positively actuated, springs only being employed
to effect their return, so that no springs or other
delicate parts are involved when the combina
tion is worked. At the same time, the mecha
able along the other rock-shaft whereby to be 45
placeable opposite any of the lower slide bars,
such latter pawl being adapted to engage the
ratchet formations of the chosen lower slide bar
in order to periodically advance the latter, and
means to move the latter pawl along its rock
shaft control led by the advance of the top slide
bar.
so
6. A combination-lock comprising a set of su
perimposed slide bars having characteristics
adapted to aline for registration to represent
the solution of the combination, a control to pe
riodically operate the slide bars the respective
distances to procure said alinement, check means
to hold each slide bar in ‘any position of advance,
nism is of so compact a nature as to be fully
60 housed in the door or only the frontal portion ' a second control operable to release said check 60
means, and automatic means effective to restore
thereof, leaving a maximum of room for other
purposes. With the lock involving a series of
consecutive controls, the combination may either
be a short one for an individual to have charge
65 of , or a longer one wherein sections are entrusted
to two or three individuals. For instance, these
may be the partners in a business, each having a
section of the combination unknown to the
70
others.
Thus, it would require all of the part
the slide bars to the initial positions in the event.
of such release.
‘
.
7. In a safe, a combination lock for the door
thereof comprising a set of superimposed slide '
bars having cavities adapted to aline for regis
tration to represent the solution of the combi
nation, a control to periodically operate the slide
bars the respective distances to procure said
alinement, a door»release means, a second con
ners to join in a given order before the lock can
be opened, in case it is desirable that no one or
trol adapted to be engaged by and to actuate said
two parties have complete control of the combi
nation. Finally, the novel lock makes it possible
75 to open the safe in partial or complete darkness,
slide bars and normally maintaining the door re
lease means out of said engagement, said lever
door-release means, and a lever opposite the
being movable to seat insaid cavities when they
70
2,118,478
are alined, whereby to procure said engagement
bars to their original positions when said retain
and make the door releasable by said second con
ing means are withdrawn, an extension of said
trol.
8. In a safe, a combination lock for the door
thereof comprising a set of superimposed slide
bars having cavities adapted to aline for regis
tration to represent the solution of the combi
nation, a control to periodically operate the slide
bars the respective distances to procure said
alinement, check means to hold each slide bar in
any position of advance, asecond control oper
able to release said check means, door-release
means, said second control being adapted to be
engaged by and to actuate said door-release
means, and a lever opposite the slide bars and
normally maintaining the door release means out
of said engagement, said lever being movable to
seat in said cavities when they are alined, where
by to procure said engagement and make the
20 door releasable by said second control.
9. A combination lock comprising a master
slide bar, a set of secondary slide bars in grouped
relation with the master slide bar, all the slide
bars having ratchet surface formations, a pair of
25 controls, a pawl connection from one control to
periodically advance the master slide bar, a pawl
connection from the other control to periodically
advance any one of the secondary slide bars, and
a support along which the second-mentioned
30 pawl connection is adjustable to come opposite to
support operative to raise the lever out of its
seated position on the further movement of the
control, and means to withdraw said retaining 5
means on the ?nal movement of the control.
13. The structure of claim 11, means to retain
the slide bars at the position to which they have
been moved, automatic means to return the slide
bars to their original positions when said retain
support operative to raise the lever out of its
seated position on the further movement of the
control, and means to withdraw said retaining
means on the ?nal movement of the control, said 15
support comprising a slide operated by the con-l
trol, and said withdrawing means comprising a
rising cam adapted to bear on the lever when
the control undergoes said ?nal movement.
14. The structure of claim 11, means to retain
the slide bars at the position to which they have
been moved, automatic means to return the slide
bars to their original positions when said retain
ing means are withdrawn, an extension of said
support operative to raise the lever out of its 25
seated position on the further movement of the
control, and means to withdraw said retaining
means on the ?nal movement of the control, said
support comprising a slide operated by the con
trol, and said withdrawing means comprising a 30
and engageable with the particular secondary
rising cam adapted to bear on the lever when the .
control undergoes said ?nal movement, said door
release means being yieldable at the point when
contacted by the lever, in order to allow for
pressure by the latter as induced by the cam
comprising a master one and a secondary set in
11. In a safe, a combination lock for the door
thereof comprising a set of superimposed slide
bars having cavities adapted to aline for registra
tion to represent the solution of the combina
tion when the slide bars are moved predetermined
distances, door-release means, a control adapted
to be engaged by and to actuate the door-release
means, a lever opposite the slide bars and nor
mally maintaining the door-release means out
of said engagement, said lever being movable to
seat in said cavities when they are alined and
permit said engagement of the door-release
means, and a support for said lever retaining it
in its normal position, such support being con
nected to said control and movable to depart
from the lever when the control is actuated and
permit the lever to assume said seating move
ment.
12. The structure of claim 11, means to retain
the slide bars at the position to which they have
been moved, automatic means to return the slide
1O
ing means are withdrawn, an extension of said
slide bar selected to be advanced.
10. The structure of claim 4, the slide bars
grouped relation with the master slide bar, and
said rock-shafts being arranged in alinement
transversely of the slide bar group.
40
5
without separating said engagement.
15. In a safe, a combination lock for the door
thereof composing a set of superimposed slide
bars having cavities adjusted to aline for regis
tration to represent the solution of the combina 40
tion when the slide bars are moved predetermined
distances, a door bolt, a member for retracting
the latter and terminating with a hook, a lat
erally-movable control shaft with which the hook
is engageable, a lever opposite an intermediate 45
portion of the hook and normally maintaining
the same out of said engagement, means urging
the hook to seat the lever in said cavities when
they are alined and simultaneously engage the
hook with the control shaft, means for restoring 50
the slide bars to their original positions, a slide
operated by the control shaft and having a ris
ing cam effective to urge the lever against said
hook portion, a break-joint between the latter
and the bill of the hook,‘ and a spring between 55
the components of the break-joint to render the
hook yieldable to the urge of the cam.
MATHEW SCHN'UR.
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