US940300A

US940300A - Lock.

Info

Publication number: US940300A
Authority: US
Inventors: Bruce Borland
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-06-14
Filing date: 1905-06-14
Publication date: 1909-11-16
Anticipated expiration: 1926-11-16

Description

A B.A BORLAND.

LOOK. l APPLIoATIoN FILED JUNE 14, 190s,

940,300. Patented N0v.16,19o9. j

3 SHEETS-SHEET 1.

'darf-,sg

B. BORLAND.

LOCK.

APPLICATION FILED JUNI: 1&1. 1905.

940,300. Patntea NOI/16,1909

3 SHEETS-.SHEET 2.

B; BORLAND.

LOCK.

APPLIoATIon FILBDJUHB 1'4, 1905.

' Patented N0v.16.1,9o9.

3 SHBETB-SHBET 3.

BRUCE BORLAND, F CHICAGO, ILLINOIS.

Loox.

Specification of Letters Patent.

Patented Nov. 16, 1909.

Application led .Tune 14, 1905. Serial No. 265,206.

To all 'whom it may concern: g Be it known that I, BRUCE BORLAND, a citi- `zen of the United States, residing at Chi-l Vhad therein to the accompanying drawing.

My invention relates to locks, and partici' ularly -to multiple-key or changeable key locks designed for vaults, safe-deposit boxes, and the like. In this class of devices an 1nner box is usually removable from a compartment or box proper whose door is provided with a lock, the general practice being for the depositor to withdraw this inner box and carry it to a. separate booth or room to examine his papers, the door of the compartment or box proper usually remaining open until the inner box is returned to place. In these locks the combination is re-settable or capable of being changed to accommodate different keys for various reasons; for ex-y ample, if a depositor or box-.holder loses his key the combination maybe changed or reset to a different key to prevent the finder of the lost key or other unauthorized person using such key to open the box. The change j in the-'combination can be effected only when the door upon which the lock is located is open to provide access to the box because the parts operated to change or re-set the comstructed without the knbwledge of the owner of the box, and in this way gain access to 'the box without the use of the key held by the owner Thus an unscrupulous or dishonest guard might reset the lock` to another key while he was in attendance upon a. customer holding the key to the, lock,

The special object of the present invention is to preclude the possibility of the surreptitions changing oi the combination of such a lockm'hilelthe box to which it is applied is open by setting its tum'blers to a key which u'ouldthen be kept for future use by the person who wrongfully changed the combination or b someone in league with him.

With this object in view the invention consists in tue cerdination with the 'resetting means of a safety or supplemental lock actuate by a key which vwill prevent the surreptitious resetting 01" the main lock and control the changing or resetting of the combination of the main lock from its adaptation to a depositors or change-key of one form to that of another form. The key of this safety or supplemental lock is held by thel manager of the safe-deposit vault, and so it is indispensable that the manager be present and co crate to resetthe combination; his supp emental lock controls this change, and its operation and his presence are conditions precedent to resetting the combination for another depositors or change-key.

Other objects and advantages of the in-4 vention will be apparent from the accompanying disclosure.

In the -accompanying drawings, which illustrateone embodiment of the invention- Figure 1 is aperspective view of the lock, showing the bolt in its shot position; Fig. 2 is a plan view of the same with the bolt latch released; Fig. 3 is a sectionl on the line 3 3 of Fig. 2; Fig. 4 is a section .substantially on the line 4 4 of Fig. 3; Fig. 5 is a detail perspective view of the rotating bolt tumblers showing the same separated from each other for purpose of clearness; Fig.l G is a detail side elevation of the bolt and locking latch;

Fig. 7 is a fragmentary plan view of thev lock showing the locking tumblers in their registered position; Fig. 8 is a plan View with the locking tumblers disengaged from the operating gears and the parts in position for changing the combination; Fig. 9 isa detail sectional view partially in elevation of `the key way and pin; Fig. 10 is a detail side elevatio of the master tumblers; Fig. 11 is a side e evation of a key employed with the lock; Fig. 12 is a similar view partially in section; Fig. 13. is an end elevation of the key; and Figs. 14, 15 and 16 are diagrammatic views'of various forms of keys einployed with the lock.

Referring to the drawings, 15 indicates the lock casing.' This easing may be of .any suitable shape and size and in thepresent instance is shown as rectan lar and provided ,with a face plate 16 suita ly secured thereto.

The front end of the `casing is provided with the lusual opening 17 in which reciprocates thebolt 18. The movement of the bolt is limited in its shot or advanced position by suitable shoulders 19, as show'n in Fig. 2,

Q j Y 940,300

which engage shoulders 20 on the front end of the casing. The bolt 18 is provided with a rearwardly extending tail 21 which ex-` tends from one end thereof and is located adjacent one of the side walls of the casing. The rear end of the tail 21 is provided with teeth, the toothed portion being in the form of a rack bar 22 which in the presentem bodiment of the invention extends beyond the end of the tail 21, and in a different plane as shown in Fig. 6. A bolt latch 23 is pivoted between its ends on a post 24. on

the front face ofthe tail 21fand=its rear end is adaptedto engage a' stop 25 which may be A tumblers, and'in the preferred embodiment of my invention. I' employ two sets of tumblers operated respectively by -the depositors or changefkey formed in the adjacent side wall of the caswardly, as at 28, so as to react against -the bolt latch 23. The latch 23' is provided with an inwardly extendin tooth 29, the'purpose of 'which will be ereinafter explained. While the stops 20 arrest the boltein its shot position the bolt latch 23 by reason of its engagement with the stop 25 holds the bolt,-

m such position and prevents retraction thereof until the' latch lis released'. The latch is released trom its position dogging the bolt and the bolt is retracted by suitable and by the guards or custodians ke nelther key alone being capable of unloc ing Athe box, the lockin tumblers being constructed to be set to di Aferent combinations for coaction with differ-` ent depositors keys and the guard tumblers of all the locks being operative by the sameuard-key which therefore is a masterkey or all' the boxes. The locking tumblersI in the present embodiment of my invention are two-part tumblers the respective parts whereof may be reset for coaction with ditferent change-keys and comprise-two-sets of coperati'ng. rotatable wheels, the sets being 4 locked and unlocked -by a resetting `means comprising an adjust1ngeccentric `Whichsimultaneously moves the wheels of one' set with respect to the other so as to unlock the sets vand then restores the parts to engaged i' position after the combination has been v changed to a different depositors key, The emental or safety lock for preventingi SUPP surr'eptitious resetting of'the tumblers con-v trols this adjusting-eccentric.

A post 30 mounted at its lends in the rear wall 31 ,and face plate-16 of the casing is provided with an eccentric Aportion as.v clearlyv shown in thedrawings. The locking tumblers are in twoparts, and the `movable parts 'or wheels 32, 3'3 and 34 'of the locking turnblers are` pivotedv on this eccentric, these wheels being designed when in certain osi- -tlons to prevent the disengagement o the bolt latch 23 from lthe sto 2 5, but adapted to be suitably operated an moved to a pre determined position to permit the release of the latch from its stop to allow the bolt to beiretracted. In the present A.instance 'three tuinblers are employedand the number may ofcourse be varied. The wheels are pro-A vided' with suitable teeth and in the present instance are in the form of pinions. Each wheel is provided with a radial slot 35 extending inwardly from the periphery thereof va suitable distance formi-ng a gating. When the bolt is shot and the wheels 32, 33

and 34 are in locking position the gatings 35 are out of alinelnent or register so that j the body of the wheels obstructs the movei ment of the bolt latch by presenting the solid 'portions thereof in the-path of the tooth` 29, the length ofvwhich is at least e ual tothe combined thickness of the w eels. A pinion 36 is pivoted on a hub 37 ofthe post 30 back ofthe wheel 34 and meshes with t-heA rack bar 22. The wheels4 32, 33 .and 34 constitute the parts of the tumble'rs movable by the resetting means 30 to permit the tumblers to'be reset for a' different change-key, and may .be rotated to bring theirv gatings 35 into registeredv or un- 'lockln position'through the. medium vof any suitab e means constituting the other parts v ofv the two-part tumblers; d In the embodiment of` the invention .I emp oy for this purpose a second `set of wheels such as the series of

gears

38, 39 and 40 which are pivoted on a post 41 the ends of which aremounted in the opposite walls of the casing. The

gears

38, 39 and 40 mesh with the pinis also pivoted on'the post-41 between the adapted to mesh 4with .the pinion 36.

,the

gears

38, 39 andV 40 aredesignedv to ro`- tate independently ofl eachother, in order to prevent movement by frictional engagement one with another Ifpreferably separate these lgearsby plates-43. i Thesef'plates are resent ions 32, 33 and '34',-res`pectively. A gear42 i 'i '1.10 gear 40 and the wall 31`and this gear 42 vided with suitable openings through w ich.-

Vthe post v41 passes' and are. heldy against -*movement on such post by means of a pin 444 which is fixed in the rear wallf31of the- `ca s4 ing and passes-.through suitable openinjgsin The

ears

38,39 and'40 are providedwit peri'p eral slots;- as clearly shown'fin Fig and pivoted .on lthe 'post 41 is aj pair of yokes rae The' plates 43 'may be extended, as att; so as tov project between'the' pinions"32,33 34, in order to space.,t'he!nj;,in accordance with the spacing. of the gears 38,939- amt-4 0 47 the arms of which are pivoted on the said post above and below, the group ofgears 38, 39, 40 and 42.

Theseyokes 47 act in opposition to each other against the edges of the recesses in the gears and arel held under. spring pressure by means of a spring 48 which passes around the post lstl-and has its ends bent over, as at a9, to engage the and unlocking position it is necessary to disengage the bolt latch or dog 23 from stop 25 against the tension of its spring 26 so that the bolt lmay be retracted.

Any suitable means may be employed for releasing the latch, and preferably such means under control'of a masterror guardkey is employed. In the present embodiment of the invention I employ-,a cani 50 which is maintained in its operative position by means of a series of master or guard tumblers. This cam 50, in the construction illustrated. is formed on a hub 51 provided with trunnions 52 pivoted in the oppositeV walls of the casing. A pinion 53 is rigid with the hub 5l and is located between the latter and the wall 31 of the casing. A post 54'is mounted at its ends in the opposite wallsof the casing and is provided with a plurality of master or

guard tumblers

55, 56 and 57. .Three `such tumblers are shown although the number thereof is not material and 'may be varied. These. tulnblers may be of any suitable construction but in the present instance are in the form of mutilated gears yand are provided with notches in the periphery thereof forming gatings 58. The hub is provided with a tooth 59 the length of which is at least equal to the combined thickness of the

tumblers

55, 56 and 57. A gear is pivoted on the post-54 and meshes with the pinion 53. `When the boltis shot and the master tumblers are in their locking position the gatings 58`are ont of alinement ,and the-cani50 is held against movement by reason of the engagement of the tooth 59 with the body portions of such tumblers. When, however, these tumblers are moved into unlocking or registered position, that is to say wherbtheir gatings 58 are in alinement, and when the gear O'ist-urned back- Ward or contra-clockwise, the tooth 59 will enter. the alined gat-ings 58 therebyturning thepin ion,53 and consequently moving the cam 50 into engagement with the ,end of the latch or dog 23, and the gatings 35 of lthe, locking tumblers being' in alinement,` the.

and the gear 60.

tooth 29 of the latch will enter theV alinec' gatings 35 clearing the stop 25 so that when the pinion 36 is rotated the bolt will be withdrawn or retracted. The master tumblers 55, 56 vand 57 are cut out or recessed and provided with spring pressed yokes 61 similar to the vyokes 47 of the. gears-38, 39, etc., and plates 62, similar to 'and serving the same function as the plates 43,. are intel;-r` posed between the

n'iaster tumblers

56 and 57 as well as between the latter tumbler For rotating the two sets of tuniblers and setting them to unlocking position to Apermit of the retraction ofthe bolt I' employ suitable keys vwhich are adapted while heilig inserted in the -lock to successively act upon the associated -tumblers and rotate them to registered `or unlocking position. The keys for this purpose may be of the saine general construction and because of the inter-dependence of the two sets of tumblers the cooperation of both keys is necessary in order to unlock the lock inthe forni shown. The

lkeys employed may be of any suitable construction adapted to the"a-ttainnient of the' desired end. One of such keys, that is to say the key for operating the locking tumblers, may be designated for convenience the depositors or change-key, while the other key, which supervises the locking key may' be termed the master or guard-key. In the present embodiment of l,the invention .these keys are generally the samebut differ 4tend from the end thereof a distance 4at least equal to the combined thickness of the In the present instance the toothed portion of the key is in the forni of an elongated pinion 63 the teeth of which are soproportioned as -to properly coperate `with the teeth of the gears'. Each of these keys is provided with a sinuous slot or way, the conformation of which depends upon the relative positions of the tn mblers when in theirlocking position. vAs shown in Fig. .13, the key is cylindrical and extending along the outer portion of the length of the pinion 63 is a longitudinal slot 64 which terminates at its inner end in a sinuous groove 65, For convenience in making the key the finger piece-of the key may be formed witha tubular socket 66 the bottom -of which is threaded, as at-67, as shown in Fig, 12, while the key pinion 63' is provided with -a cylindrical extension 68 having its end threaded so as to screw into the socket. With this ar- :rangemnt the v,extension may be convenu-- pinion portion of the key is `screwed into the socket the parts may be hrazed or otherwise secured together to prevent separation. Fig. 16 illustrates diagrammatically the depositors unlocking key 69, while Fig. is a similar view of the master or guard-key 70.. It will be understood., however, that the .character ofv the slot in each instance de pends altogether upon the relative positions of the slots or notches of tumblers when such tumblers are in their locked position, and that any variation in such relative positions A will necessitate the employment of a key pinion thereof will engage such gears. The

pin projects beyond the trontwall of the lock and is provided with a radial lug 74. A second pinf75 is located in a key way 76 adjacent to the

gears

55, 56, 57 and 60 and is provided with a lug 7T, such constructionvheing similar to the key way 72' and pin 71 associated with the gears 38, etc. The faceplate 16 is of course provided with suitable key holes through which the pins 71 and 7 5 project and through which the keys may be passed while sliding and turning on the'pins 71 and 75.` -As 4the key 69y is engaged with the depositors or change keyhole and pushed into the lock the longitudinal portion 64' of the slot permits the key -to Aslide* on the pin in a straight line until its pinion comes into engagement with 'y the lirst gear 38. Then as the key is pushed into registered position.

in` farther owing to the engagement with the lug 74 on the pin 4with the sinuous slot in the .key t-he latter is turned so as to rotate the' tumblers and finally bring them In unlocking the lock the depositors key 69' is inserted on its associated pin 7l and pushed inwardly. The straight portion of the slot 64 moves along the lug "Z4 until the said'lug enters the short spiral portion 78 of the key slot slightly before which time the pinionend of the key comes into'eni gagement with the gear 38. A slight axial .Y movement of the key will move the spiral portion (8 of the key slot past the lug 74 and during this movement the gear 38 is rotated and consequently the tumbler` 32 bringing the vgating 6G' 35 of the latt'er into alinement with the gating of the tumbler As the key'is pushed in farther the lug 74 enters the reverse spiral portion 79 of the gating and the

gears

38 and 39 being coupled by the key vpinion the tnmblers 32 and 33 are rotated until their alined gatings 35 are brought into alinement with the gating ofthe tumbler 34.

vThe threegears

38, 39 and 40 are now coupled and the gatings 35 of the tumblers are in alinement.

vment with the gear 42 which gear it will be remembered meshes with the pinion 36. The

master or guard-key being inserted in itsv keyway, by reason of the formation of-its' slot it is rot-ated and successively picks up' the guard or

supplemental tuinblers

55, 56 and 57, moving them so that their gatings 58 will he brought into registered position, and in position to receive the tooth 59, and nally engages the gear 60. Up to this point it 'is immaterial which key is inserted lirst and they may be inserted simultaneously,

The guard-key 70 'is now rotated to the right or clockwise and through the medium of the gear 60 and pinion 53 the cam 50 is moved into engagement With and moves the latch 23, as showninFig. 2, the tooth 59y of the hub 5l entering the alined gatings 58 of the master tumblers 55, etc., so that the' cam is inserto move. The movement of the latch 23 disengages it from the stop 25, the tooth v29 of the same entering the alined gatings of the tumblers 32, 33 and 34. The key 69 is vnow turned contraclockwise', by reason of the concentric portion 82 of the key slot, andthrough the medium or' the pinions 36 and 42l and rack bar 22 the bolt is retractedj the toot-h 29 ofthe latch heing in the gatings 35 the end of the latch clears and passes the stop 25, and as all the

parts

38, 39, 40, and 42 are geared up on the depositors or change-key and rotate together, the

parts

32, 33, 34 and 36 meshing therewith respectively are moved thereby, and the rack 22 meshing with the pinion 36 moves the latch 23 in unionism with the gears 32, 33 and 34 so that its' tooth 29 will roll out of the gatings as the bolt is retracted, and will move again into engagement with the gatings when the lbolt lis moved ahead or shot. To throw the bolt the movement of the key 69 is reversed and then both keys may be "withdrawn, such action merely reversing the operation and restoring the parts to their locking positions. .The master or guard-key may of course be employed with any unlocking key,

as' itsbiiicefs merely to release the bolt 181mb; r y

llO

The object of the spring pressed yokes 4f? and 6l is ton'iaintain the associated gears in proper position when the bolt vis thrown and to provide additional security against picking the lock as well as to restore the ltumbler would by means of the spring p ressed yokes be returned to its proper position with relation to the other gears, thereby avoiding disarrangement of the parts.

By reason of the interlocking construction described a lock is provided which is absolutely dependent for its'operation upon two keys so that Where the keysare in the possession of diferent persons, such as the renter of a safety deposit boxand the guard, both such persons must be present to open the lock. Moreover, the lock is made doubly secure against picking inasmuch as two sets `of ti'unblers must he manipulated' in order to retractthe bolt, and the particular character of 'the tumblers renders the lock proof against the requisite manipulation'Without proper keys. In the event that an attempt is made to pick the lock the parts are automatically. restored to their predetermined positions so that there is no. danger of the lock being put out of order When tampered with.

The means provided for resetting orchanging the combination of the-lock in the event it is desired for anyreason to changev the unlockingor depositors key, and the means for preventing the surreptitious resetting of the lock, may be of any suitable form or character', and these results are ac` complished vin the present embodiment of the'invention in the manner now to be described.

kAs above described the locking tumblers are in'two parts formed by the pinions and gears respetively, and as shown in Fig. 3, that portion of the post 30 on Which the pinions 32, 33 and34 are mounted is eccentricto the pivoted. ends o f such post, and this post is designed tobe rotated so astodisengage the pinions 32, 33 and 34 from the

gears

38, 39 and 40 to provide-for resetting the combination. For this purpose the end vof the post.

passing through the rear wall of the lock casing `may. be provided With a threaded' socket 82 into which screws a key, such asa bolt 83. By turning this boit it Will beobvious that owing to the eccentric portion of the post the pinions 32, 33 and 34 Will be disengaged from their associated gears as.

shown -in Fig. 8. Under normal conditions suchdisengagement 1s 'prevented by a stop or dog 84 which is pivoted tov the post 41 andengages a notch 85 in a disk 86 fixed to the'post 30. The dog is providedwth an |varm 87 having a yoke 88 in which is located a'controlling cam or eccentric 89 fixed to the hub 51 back of the pinion 53. The disk 86 able distance apart to limit the rotary move spaced a. suitable distance therefrom. The

`

tumblers

55, 56 and 57 are provided With gatings 93 adapted by suitable movement of such tumblers to be moved into alinement so as to receive the tooth 92.

In resetting the lock a depositors keyvfor which the lock has previously been set is inserted in the lock so as to move the locking tumblers into their unlocking' position, as shown in Fig. 7. -A managers key 94, Which is inthe possession of an authorized official, suclras the manager of the safety deposit vault, is noW employed for the purpose of releasing thedog 84. The managers key is 'substantiallysimilar to the other keysheretofore described With the exception that the concentric inner end 95 of the slot extends in a reverse direction from the corresponding portion ofthe slot of the master or guard-key 70. The sinuous slot G5 of the managerskey 94 is of such character effects the movement of the

tumblers

55, 56 and 57 to bring their gates 93 into alinement and in position to receive the hub tooth .92 vso thatl the hub may .be turned. W hen the parts, as shoWn in Fig. 8. The 'unlocking key is now Withdrawn from the lock, their gatings 35 engaging the tooth 29. The new and during such insertion it rotates the gears tion of its slot.v The key having -been en- '38, etc., are in unlocking position for the new key and that the pinions 32, etc., are also inunlocking position, that is to say, 1n

such position that their gates are in aline'-Y is provided With shoulders 90- spaced a 'suit i a second tooth 92 similar to the tooth 59 and i that when the key is inserted in the lock it depositors or change-key is then inserted tirely inserted it is apparent that the gears ment of the post 30. As shown in Fig. 4,

managers key is inserted .in the lock its. 'l

tated disengaging the registered pinionparts of the locking tumblers from the

gear

38, 39 and 40 in accordance with the formaiso y mental lock were not in existence.

ment and in the path ofthe tooth onthe bolt latch. The post 30 is now rotated.back

ward so as to throw the pinions into engagement with the gears, and then both the new key and the managers key may be with-` tric 30.

The

tumblers

55, 56, 57 with their associated parts provide a tumbler lock which forms' a supplemental lock for locking the adjusting-eccentric 30 against being turned in either direction for resetting the lock to a new `key as" might readily be done surreptitiously leven in the brief interval during which the bac-k of the lock is exposed in use bythe door of the safe-deposit box to which it is applied standing open while the inner box is withdrawn. It will be understood, of course, that this supplemental lock isnever used exceptwhen it vis desired to reset the main lock to a new key. At all other times the main lock is used precisely as if the supple- For the legitimate resetting-of the mainlock to conform to another key, the managers" key is indispensable for it must be used tounlock the supplemental lock and effect the turningof the controlling eccentric 89 through the mediumofthe pinicns 60 and 53,-. and itl must also be us'ed to return the controlling eccentric 89 after the tumbler-s are reset to lock vthem in reset position on la. diierent or changeable key lock.

combination.

While the `present embodiment shows the supplemental or safety lock cordinatedfwith a lock requiring the supervision of the guard-key, it is obvious that lwhen the box to which itis applied is open.

The key to the supplemental lock is kept by the manager `of the safeedepositvault' and it is never' brought into use except when he is called upon to produce it by the depositor. On the one hand, none of the baule oiiicials can get at the safety lock to use the managerskey in the absence of the depositor as the vtumblers .of the main lock must first be alined jby-the use of the deg.

positors key which the depositor. .holds and even ,if the box be leftopen with the users key-withdrawn as is usual, the guard can not Vreset the combination as the users key must be inserted and turned to move the locking tumblers to position to aline their gatings to unlock the bolt before the resetting device can be operated, the toothl29 otherwise preventing the eccentric movement of the part 30 and its associated gears by abutting on the peripheries of the latter, s and furthermore even if the boX be left open with the users key in place the guard can' not resetthe combination as the managers key is indispensable for this purpose; on

the other hand, in the preferred embodiment of the invention with a lock-requiring the cooperation' of a master or guardvkey to open it, the depositor himself or one finding the depositors key could'not get at theresetting means until the box containing the lock had been opened by the cooperation of the guard holding the guard-key, as these',

two keys arenecessary to unlock the box;`

and in no case can the guard or other unauthorized person operate the resetting means to reset the combination as the safety lock under the sole control of the manager locks the resetting means against all unauthorized or surreptitious resetting of the combination.

Having describedv my invention what I claim as new and desire to secure by Letters Patent of the United States, is.

1. In a multiple-keyl lock, the combination with a two-part tumbler the respective parts whereof are constructed to be reset for coaction with different keys, of means forl resetting the said tumbler, and a'supplemental lock for locking the said resetting means against surreptitious resetting of the tumblers, said -supplemental lock -being locked and unlocked by a key.

2. In a multiple-key lock, thecombination with a plurality of two-part tumblers'the an adjusting-eccentric for lresetting the tum.-

blers, and. a supplemental lock for locking the eccentric.

iis'

' 3. In af.inultipl e-key lock, the combination with a plurality of two-part tumblers the respective parts of which are constructed to be reset for coaction with different-keys, of means for resetting the said tumblers, anda supplemental V'tumbler lock for locking the said resetting means against surreptitios lock being locked and.l unlocked by a key'. 4. In a. multiple-key lock, the combinationl 'resetting of the tumblers, said supplemental y rast"` with, a plurality of 'two-part tumblers the zrespective parts of which are constructed to be reset for coaction with different keys,'of

an adjustingeccentric for yresetting the said ,tumblera a supplemental tumbler lock, and

parts of which are'separable for pinions-interposed between the eccentric andv supplemental lock for locking the said eccentric.

5.- In a multiple-key lock, the-combination With a two-part vpivoted-tumbler the respective parts of which are constructed to be reset for coacti'on with different keys, of means for resetting the said tumbler, and asupplemental lock for locking the said resetting means against surreptitious resetting of the tumblers, said supplemental vlock being locked and unlocked by a key.

6. In a multiple-key 1ock,-the 'combination with -a two-part pivoted-tumbler comprising a main part anda supplemental part constructed to beset in a variety of relations with respect to each other for 'coaction' With different keys, of. means for resettingthe said tumblers, and a supplemental lock for locking the said resetting means against surreptitious resetting of the tumblers, said supplemental lock being locked l.and-unlocked by the key.

T. Ina multiple-key lock, the combination with a plurality of'tWo-part pivoted-tumblers each comprising a main `part and a supplemental part, and each constructed to -have1its supplemental part adjusted Wit-l1 respect to its main part an adjusting-eccentric reacting with all of the tumblers for resetting them for coaction with different keys, and a supplemental lock for locking the eccentric.

e. In-a multiple-key lock, the combination with a plurality of two-part pivoted-t-umblers the parts of which are separable for being set for coaction with different keys, of means coacting with all of the two-part tumblers for simultaneously moving one part of each tumbler with respect to the other part thereof, so as to vunlock the two parts of each tumbler, and then restoring the parts of each tumbler t0 their locked po: sitionsafterone part of each tumbler has been set to avkey, and a supplemental lock for locking the resetting means against surreptitious resetting of the tumblers, said supplemental lock being locked and unlocked by a key.

9. In a multiple-key lock, the combination wit-lila plurality of two-part tumblers the l i being set t'or coaction with different keys, of an adjusting-.eccentric passing through all of the tumblers for simultaneously separating their parts to permit them to be reset and simulltaneously restoring their parts to their normal positions, and a supplemental tumblerlock locatedinl the case of the multiple-key lock andl connected with the said eccentric bymeansof pinions whereby the eccentric isy held inthe posit-ion which it has' when the respective. parts of the tumblers are com- 10.v In a mult-'iple--key'19t-"kfA the combinaviding avchangeable key lock wherein the combmation is changed only after the insertion and turning of a change-key to posltion.

to move the tumblers to unlock the bolt, a

safety locking device for preventing the surreptitious resetting of the tumblers to a dit'- ferent key, and a key for actuating the safety locking device.

12. In a lock, a bolt and tumblers providi ing a changeable key lock wherein the tumbler combination is changed only afterthe insertion and turning olb a change-key to position to move the tumblers to unlock the bolt, means to reset the lock, .and a. safety locking devicepreventing the `operation `of the resetting means until the locking device is operated by its proper key.

13. In a lock, a bolt and tumblers providing a changeable key lock wherein the tumbler combination is' changedonly "after the insertion and turning of a change key to position to nio-vc the tumblers to unlock the bolt. means operated from the rear face of the lock to reset the combination, and' a safety locking. device preventing the loperation of the resetting means until the locking device is operated by its proper key. y

Y llt. In a multiple-key lock, t-hecombination with a bolt and a plurality of tumblers constructed to be reset for coaction with different keys, of an adjusting-eccentric operative `from thel rear of the lock for resetting the said tumblers, a supplemental tumblerlock, and pinions interposed between the eccentric and supplemental lock for locking the said eccentric.

In amultiple-key lock, the combination with a bolt and locking-tumblers constructed to bereset for coaction Wit-h dii'erent keys, of means operative lfrom the rear face of the lock for' resetting vthe* said tumllt) blers only when the tumblers areA in position to unlock the bolt, and a supplemental lock i for locking the said means against surreptitions resetting untilsaid vsupplemental lock is operated by its proper key.

16. In a multiple-key lock, the combination with `a bolt and a plurality of locking tumblers constructed to be reset for coaction with different keys, of anadjustlng-eccentric for'. resetting.l the vtumblers andoperative only i vWhen-the locking tumblers are in predetermined positiom'and-a supplemental lock .for loeltii'igthe eccentric.

17. In a lock, abolt'and lockingr tumblers "bij providing a changeable key lock in which lthe tumbler combination 1s changed after..

when the tumblers are in a predeterminedA position, and a supplemental lock for locking the resetting means against surreptitious change of the combination.

19. In a changeable key lock, a bolt, locking tumblers, means to reset thelock only when the tumblers are in a predetermined position, and a supplemental lock for locking the tumblers against surreptitions resetting. 4

20. In a multiple-key lock, the combination with a bolt andlocking tumblers constructed to be set in a variety of relations for coaction With different. keys, of means for resetting the said tumblers onlyivhen the latter are in position to unlock the bolt, andasupplemental lock for locking the said means against surreptitious resetting. and operative independent of the position. of the bolt or tumblers.

21. In a multiple-key lock, the combina` tion with a bolt and a plurality of tumblers constructed to be reset kfor coaction with different keys, of means' for resetting the said tumblers only when the latter are in position to unlock the bolt, and a supplemental tumbler-lock for ylocking the said means against surreptitious resetting and operative lindependent. of the position. of the bolt or locking tumblers. i

22. In a changeable'key ljock, the combinationwith a bolt, andtumblers' Which can be reset only when in position to unlock the bolt, of a safety locking device which must-.be operated by a key beforethe main 4tumblers 'of the lock can be reset to conform to a different key.

23. In a changeable'key lock, the combination With a bolt and tumblers, of a single key Safety locking device which must be operated by its key before the main tumblers ot' the lock can be reset'to conform to a dii'erent form ofchange-key, and is operated by the key after the tumblers are'reset.

24.4 In a changeable key lock, the combination With a bolt and a series of locking turn-v i' blers therefor, of. a main opening for the key actuating the bolt, and a single key safety locking device for said locking tumblers Which has an independent key-.opening and`l must be operated by its key before the main tumblers of the lock can be reset, and i-s operated bythe key after the tumblers are reset.

25. In a changeable key lock, the combination with a bolt, a series Aof locking tumblersftherefor, and a key for actuating the tumblers and moving the bolt, of a safety locking device for preventing surreptitious resetting of the tumblers, and a key for actuating the safety locking device, the parts being arranged 'whereby the combination re# mains locked until the locking tumblers are moved to position to unlock the bolt and the safety lock is operated by its key.

26. In a changeable key lockthe combina tion with a bolt, tumblers therefor, and a key for setting the tumblers and moving the bolt, of a safety locking device for prevent' ing surreptitious resetting of the tumblers', and a key for actuating the safety locking device, the parts being arranged whereby the. lock is secured against resetting for a different key until the tumblers are moved to position to unlock the bolt and the safety lock is operated by its'key.

27. In a multiple key lock, the combina tion With a bolt and a plurality of lockingtumblers capable of coperation in differentk combinations, an eccentric controlling the resetting of the tumblers, and a supplemental lock permitting lthe operation of the eccentric When unlocked and for locking the eccentric against surreptitious resetting when locked.`

28. In amultiple-key lock, the combina4 tion with a bolt and a plurality of locking tumblers which are adapted to be set for coactionY With different keys, of an eccentric controlling `the resetting of the tumblers, "and a supplemental lock permitting-the op. eration of the eccentric when unlocked 'and for locking the eccentric against surrepttious resetting When locked, the arrangement of parts being such that the tumblers are locked against resetting for a different `key until they are moved to position to unlock the bolt and the supplemental lock isoperated.

29. In a changeable key lock the combination with a lock-casing, a bolt therein, guards keys and depositors keys for operati ing said bolt from the front face of the lock,

of a resetting device for changing the com ingtumblers andy supplemental tumblers' both of which must be' key operated before lSO ' tumblers, another to set the guards tumblers,

and the other to move the movable element Y to permit the locking tumblers to be reset.

33. In a changeable key lock the combination with a bolt, guard tumblers and locking tumblers'both of which are set to retract the bolt, and a stop to prevent surreptitious resetting of the locking tumblers, of a key for actuating the guard-tumblers, a key for actuating the locking-tumblers, and a key for actuating the stop to permit the locking tumblers to be reset.

34. In a changeable key lock the combination withv a bolt, guard tumblers and locking tumblers both of which are set to retract the bolt, an adjusting eccentric for resetting the locking tumblers, means to hold the eccentric in position, of a key for' actuating the guard-tumblers, a key for actuating Vthe locking-tumblers and for withdrawing the bolt, and a key for actuating the eccentricholding means.

35. In a changeable key lock the combination with a bolt, guard tumblers and locking tumblers both of which are set to retract the bolt,- and means for controlling the resetting of the locking tumblers, of a plurality of key-openings in the lock-case, and three keys one adapted to set the lockino tumblers, another to set the guard tumblers, and the other 'to control the resetting means.

36. In a changeable key lock the combination with a bolt, guard tumblers and locking tumblers both of which are set to retract the bolt, and means for controlling the resetting of the locking tumblers, of a key for actuating the guard tumblers, a key for actua-ting the locking-tumblers, and a key for actuating the means for controlling the resetting of thelocking tumblers.

37. In a changeable key lock the combination with a bolt, guard tumblers and locking tumblers both of which are 4set to retraet'the bolt, and means for4 controlling the resetting of the locking tumblers, of a ke for actuating the guard tumblers, a key or actuating the locking-tumblers and for withdrawing the bolt, and a key for actuating the means tor controlling the resetting of tIie combina-- tion after the locking tumblers have been set.

38. In a multiple key lock, the combination Witha bolt and a plurality of lockingtumblers comprising two sets of wheels ca- 'pable of cooperation in diieren't relatlve po- .Sitions, an adjustingeccentric coactingwith all of the -wheels of one set for resetting them for coactionwith the wheels of the other set, and a supplemental lock `for locking the eccentrics *against surreptitious resetting action. l

39.' In a multiple-key lock, the combination with a bolt and a )lu'rality of tumblers comprising two sets ot' coperating wheels which are se arable for being set for coaction with -ditterent keys, of an adjusting eccentric coaeting with all of the wheels of one set for simultaneouslyV moving said set with respect to the other set so as to unlock the sets, andthen restoring the parts to their locked positions after one set of wheels has been set to a key, and a supplementallock for locking the eccentric against surreptitions resetting action.

40. Inla multiple-key lock, the combination lwith a bolt and'a plurality of sets of Wheels forming tumblers the sets of which are separable for being set for coaction with dilferent keys, ofl an adjusting-eccentric assing through all of the'wheels of one set -tor simultaneously demeshing the sets to permit them to be reset and for simultaneously meshing the sets in their reset relatiomand a supplemental tumbler lock -located in the case of the multiple-key vlock and connected with the said eccentric by means ofpinions whereby the eccentric is held lin the position 4 tumblers are combined as in use.

41. In a lock, the combination with a bolt and a clogging latch therefor, of a plurality of rotatable tumblers having gates normally out of alinement and adapted to be moved which it has when the respective parts of the into a predetermined position to permit of f the release of the latch, keyoperated gears for moving the tumblers into such predeter- 42. In a lock, the combination withA a bolt and a latch-therefor, a plurality of tumblers having gates normally out of alinement, gears for rotating the tumblers to bring the gates thereof into alinement to permit of the'relea'se of the latch, a key-for 'engaging the teeth of the gears to rotate the latter,

means for disengagingA the tumblers from the gears simultaneously, whereby such tumblers may be disengaged when in` their unlocking position to permit of the resetting of the lockby another key, and a supplemental lock for locking fthe 'disengaging means to prevent surreptitious resetting of the main lock. Y

43.' In a lock, the combination with a bolt t and a latch for preventing retraetionof the bolt, of tumblers having gates normally out- CII of alinement, gears engaging the tumblers, a key having a sinuous slot and provided with a pinion, a key guide having a lug adapted to coperate with the slot and whereby when the key is inserted the gears are successively engaged and rotated to bring another key the tumbler gates into alinement to permit of the release of the latch, provision for disengaging the tumblers from the gears when I ock.

44. In a lock, the combination with alock casing, a bolt and a latch for preventing retraction of the bolt,`a. post pivoted on theA casing and having` an eccentric portion, a

plurality of tumblers pivoted on such eccentric portion and having gates normally out 'of alinement, gearsy meshing with the pinions, a key-for turning the gears to rotate the tumblers to bring their gates into alinement, means for releasing the latch when the gates of the tumblers are in alinement, a dog for holding the post against movement, a cam for releasing the dog, andprovision for turning the post to disengage the tumblers from the gears when the (10g is released, whereby such tumblers may be disengaged when their slots are in alinement and the gears may be operated by another keyto unlocking position to reset the lock and the .tumblers then moved into engagement therewith, and a supplemental lock controlling the cam to prevent surreptitious vresetting of the lock.

45. ln a lock, the combination with a casing, a bolt, and a latch therefor, of an eccentric-post pivoted o'n the casing, toothed tumblers pivoted on` the post and having slots normally out of a-line'ment, gears meshing with the tumblers, a key for successively engaging the gears to rotate the tumblers and bring their slots into alinement to permit of the release ofthe latch, a hub having a cam to release the latch and a pair of teeth, a pinionvv and a second camiixed tothe hub, a dog for holding the post against movement andprovided with a yoke cooperating with the second cam, tumblers having two sets o'f notches, keys for actuating -the said tumblers one of which keysis adapted to` bring one set of notches into alinement to receive one ofthe hub teeth and toactuate the hub pinion to move the latchactuating cam and the other of which is adapted to bring'the other set of notches in alinemcnt to recel-ve the other hub tooth and to turn the hub pinion in the opposite direction and move the second cam to disengage `and locking means therefor,

the dog from the post, and provision for turningl the post to disengage the tumblersv from their gears when the dogv 1s released,

whereby such tumblers may be disengaged when their slots are in alinement andthe gears may be operated by another key to unlocking position to reset the lock and the tumblers then moved into engagement therewith.

4.6. Ina multiple-key lock, the combination with a bolt, and a two-part tumbler the v tumblers only when the tumblers are in posi- .tion to unlock the bolt, and a supplemental tumbler-lock for locking the said resetting means against surreptitious resetting ot' the tumblers. v

48. 1n a multiple-key lock, the combinationv with a bolt, and a two-part pivotedtumbler the respective parts of which are constructed to be reset for coaction with different keys, of means for resetting the said tumbler only when the tumbler ,is in position to unlock the bolt, and a supplemental lock for lockingthe said resetting means against `surreptitious resetting of the tumblers.

49. In a multiple-key lock, the combination with a two-part tumbler the respective partswhereof .are constructed to be reset for coaction with different keys, Of'means for resetting the said tumbler, and a supplemental lock locked by a key to lock the tumblers in reset position.

50. In a multiple-key lock, the combination with a plurality of two-part locking tumblers the respective parts of which are constructed to be reset for coaction with the 5 different keys', of means for resetting the said tumblers` and asupplemental tumblerlock locked by a key to lock the main tumblers on their new combination.

5l. In a lock, the combination with a bolt and locking means therefor, of a tumbler adapted to be moved into position to permit of the release of the said locking means, andv independently actuated tumbler mechanism t for releasing the said llocking means when the first tumbler is in such position.

52. In a lock, the combination with a bolt of a plurality of tumblers adapted to be moved into predetermined position to permit of the release ofthe said locking means, and independently position.A e A,

. 54,. In -a lock, thecombination with abolt anda latch for preventing the-retraction of the bolt, of two sets oftuniblers yi)nent- Which `leasing' means;y

56; In `afloclt,thecolnbination witha bolt,

-actu'ttedutumbler mechanism 'for releasing .A

the said locking means when thefirst -tumblers are m such position.,

53. In a lock, the combination With-a bolt and alatch for preventingithe retraction of the bolt, tumbler-s adapted to be moved into predetermined position to permit. of the release o -the latch, and. independently actu-- ated tumbler mechanism lfor releasing the latch when the -first -tumblers-v are in such sets is adapted to bemoved. in to predeter 'mined position to-tpermitof thereleaseot` fwhen the first mowed to s'iich `20` position. t

lock-,.tlieedmbintion with a bolt, a latch for preventing retraction `of the bolt, of tumblcrs adapted'l to be ,moved 4into regvistered positionto permit of the release ,of the latch, means for releasin the latch when the said .tumble'rs are in registered position,y

.and other tumble'rs for controlling the rea latch for preventing retraction of the bolt tumblers adapted to'be movedinto registered posit-ion to permit of therelease of the latch, a cmn for releasing the latchlwhe'nthe tumblers are inregistered position and other tambin? for preventing movement 'of the cam.- H

'57.*111 alock, ,the'cmbination with a bolt, .an'fllocking means therefor, of a plurality 'ofmotatable tumbl'er's adaptable to be moved means when the first i, '58.YIn a `into predetermined position `to permit of the release of said locking means, and. tumbler mechanism lfor releasing the said locking tumblers are in such pbsition.

lock, the combination with aibolt andlocking means therefor, of a plurality of successively actuated rotatable tumblers adapted to be moved into predetermined position to permitlof the `release of the said locking means, and tumbler mechanism for releasin ,the said locking means when the first tum Iers are in such position. v

59. In Va lock,`the combinationwith a bolt Aand a latch' pivoted thereon, for. reventing the retraction .of the bolt, rotatab e tumblers adapted to be moved into predetermined position tope'rmitoie the release of the latch, means 'for releasing the latch when the tuinblers are`in such position, and a second set of rotatable tumblers actuated independently of the first mentioned set for controlling the releasing means.

60. yIn a lock, the combination'with a bolt, ya latch for preventing retraction of theibolt, tumblers adapted to be moved into regis- .blers are in such tered position to permit of the release of the latch, -a cam for releasing the latch when the tumblers are in registered position, master tumblers'for preventing movement ofthe cam, and means for operating the cam when the master tumblers are in predetermined' position.

and a latch pivoted thereon and engaging a fixed portion of the lock casing to prevent retraction of the bolt, lrotatable tu'mblers adapted to be moved into predetermined position' to prevent the release of the latch, a .cam for' releasing' the latch when the tumposition, and independ- -entlyoperated rotatable tumblers contro1- 625 In a lock, the

ling the' cam.

combination with a bolt,

61. In a lock, the combination with a bolt,

a latch `for preventing retraction ofthe bolt,

. rotatable tumblers adapted to be movedginto registeredposition topermit of the 'release -of the latch, a cam for releasing the latch when the tnmblers are in registered position,- mastcr tumbler-Safor preventmgmovement of the cam, and means -for operating the cam whenthe master tumblersl-arev vpredeter.

mined position. 1

63. In a lock, the :combination-"with, a ibo-lt and a latch for same", of rotata le .tumblers provided with gatings adapted when f laced intregistery by movement'of the tumb ers to permit o'f the release of the latch, a' cam` for releasing the latch 'when thjegatings arev in register,and

and 1a latch for p r'rotatable tumblers `forpreventing movement o f thefcam.

64. In a' lock, the combinationjwith a bolt and a latch forpreventing retraction of the sarnmrotatable .tumblers provided-@with gat' of, of tumblers vhaving gatings adapted to be placed in register when. 'the tumbler-s are moved to' permit of the release .of the latch, ,a cam for releasing the latchmaster tumf blers for preventing the movementof the cannexcept when such ltumblers are` in predetermined position, means for moving the master tumblers, and means for retracting the bolt when the latch is released.

preventing retraction "oil-the 1. l

holding'thecam 66. In a lock, the combination with'a bolt and a latch for preventing retraction` there-l of, of tumblers 'having gatings ada ted to be placed in register when the tumb ers-are in predetermined position to'permit of the release of theLlatch, a cam for releasing the latch 'when the tumblers arein Such`prede termined position, andtumblers for preventing the movement of the cam and-having gatings adapted to:v be. placed in register when the latter are in a predetermined position to permit of the movement of the cam.

67. In a'lock, the combination with a bolt .and a latch pivoted thereto for preventing retraction of the bolt, of' a plurality of locking tumblers having gatings normally lout ot-alinement, a cam for releasing the latch when the tumbler gatings are in alinenient,

master tumblers having gatings normally out of register to prevent movement of thc cam, meansr for moving the locking tumblers to bring the gatings thereof in alinernent, means for moving the master tumblers to placethe gatings thereof'in alinement, and

and a latch for preventing retraction of the means for retracting the bolt When the latch is released. 4 68. In a lock, the combination wlth a bolt same, of a plurality of rotatable tumblers having atings normally out of alinement,

means or rotating the tumblers to bring their gatings in alinement to permit of-the release of the latch, a cam for releasing'the latch, a plurality of rotatable tumblers hav- .ing gatings normally out of alinement,

means for rotatin the tumblers to bring their gatings into a inement, means for moving the camyvhen the gatingsof thelatter tumblers are -in alinement, and means for retracting the bolt When the latchvis released.

69. In a lock, the combination with a bolt and a latch for preventing retraction-ot` the same, of a plurality of rotatable tumblers having gatings normally out of alinement, means for releasing the latch when the gatinvs ofl thetumblers are in alinement, a plura ity of rotating ,tumblers for preventing movement of the said means, and 'keys 'adapted to successively. actuate both sets of `normally out of `alinemlent, a key provided With a pinion adapted to successively actuate the gears to bring their gatings into alinement, and means actuated by the key to move the cam when the saidv notches are in alinement. f

7l-. In a lock, the combination with a bolt yand a spring latch for preventing retraction of the same` of a post, al plurality of toothed tumblers pivoted oni vthe 'post and having gatings normally out of alinement, a plurality of gears meshing with the tumblers, a

'Mason' pin having a lug, a key adapted to the pin vand having a sinuous slot cooperating With the lug and rovided With a pinion adapted to successive yr engage the gears and rotate the tumblers to brmg their'gatings into alinement to permit of. the release of the latch, a hub having a cam for releasing the latch, such hub also being provided With a tooth and having a pinion fixed thereto, a plurality of gear tumblers having gatings normally out of alinement, a gear meshing with the hub pinion, and a key having a pinion adapted to successively engage the gear tumblers to rotate the same and bring their gatings into alinement to receive the .hub tooth and then to engage the'gear meshing with the hub pinion to rotate the latter to move the cam into engagement with the latch.

7 2. lIn av lock, the combination with a bolt, and locking means therefor, of a plurality of tumblers adapted to be moved into predev termined position to permit of the release of the locking means, means for successively actuating the tumblers to move them into such predetermined position to permit of the release f the locking means, and tumbler-controlled means for releasing the locking means when the tumblers are in such predetermined position.

73. In a lock, the combination With a bolt and a locking -latch therefor, of a plurality of tumblers adapted to be moved into predetermined position to permit of the release of the latch, tumbler-controlled means forreleasing the locking latch, and a key for first moving the tumblers into such predetermined position and then after the release of the locking latch to retract the bolt.

' 74. In a lock, the combination With a bolt, of a plurality ci rotatable tumblers each having a gate. a key for successively actuating the tumblers to moveA their gatesv into register, a boltI` a latch pivoted on the bolt and having atooth to enter the tumbler gates When in register and the latch isv moved, and means for moving the. latch.

` 75. 'In a lock, the combination with a bolt, n

of a plurality of rotatable tumblers each having a gate, a key for successively movmg the tumblersto register their gates,- a

bolt, a latch pivoted on the bolt and having a tooth to enter the tumbler gates When the,

latter are in register and the latch is moved,

and a cam moving the latch.

76. In a lock, the combination with a bolt,

of a plurality ofv rotatable tumblers each having a gate. a key for successively actuating. the tumblers to move their gates into reglster. a bolt latch havinga tooth to enter .the tumbler gates when in register `and the latch is moved, a cam for moving the latch, and a plurality of tumblers adapted to be moved 1nto predetermined position to permit ofthe movement of the cam.

77. In a lock, the combination with a bolt, of a plurality of rotatable tumblers each having a gate, a key for successively engaging the tumblers to move their gates into register, a bolt latch having a tooth to en ter the -tumbler gates when in register and the latch is moved, a camtor moving thelatch, a plurality of tumblers'adapted to be moved into predetermined position to permit movement of the cam, and means for moving the cam. y

78. lIn a lock, the combinationwith a bolt, of a plurality of rotatable tumblers. each having a gate, a key for successively actuating the tumblers to move their gates into register, a belt latch having a tooth adapted to enter the tumbler gates When in reglster and the latch is moved, a cam for moving the latch, and aplurality of rotatable tumblers having gates normally out of register, and a key adapted to first move the llatter tumblers to register their gates to permit of the movement of the cam and then actuate the cam.

7 In a lock, the combination with a bolt, a latch means for releasing the latch, of two sets of rotatable tumblers, the tumblers of each set having gates normally out of'alinement, a key-:tor successively actuating the tumblers of one set to bring the gates thereof into alinement to permit of the release y of the latch, and a key`for successively actuating the tumblers of the other set to permit of the actuation of the releasing means.

v 80. In a lock, the combination with abolt, a latch, a cam for releasing the latch, of two sets of rotatable tumblers, the tumblers of each set vhaving gates normally out of alinement, a key for first actuating the tumblers of one set to bring the gates thereof into alinement to permit of the release of the latch and then engaging the bolt to retract the same, and a key for successively actuating'the tumblers of the other set to permit of the actuation of the cam.

81. In a lock, a bolt, rotatable tumblers having normally disalined gates adapted to register to permit of the retraction ot' the bolt, and spring-pressed yokes for maintainling the tumblers in their normal positions.

S2. In a lock, a bolt, rotatable toothed tumblers havingnormally disalined gates adapted to register to permit of the retraction of the bolt, a pair of yokes, and a spring acting in opposition against the yokes to maintain the tumblers with their teeth alined.

83. In a lock, a bolt, rotatable toothed tumblers having normally disalined gates adapted to register to permit of the retraction of the bolt, pivoted gears for turning thetumblers and having peripheral recesses, a pair of yokes pivotcd on the pivot of the gears and located in the recesses, and a spring having opposite arms reacting against the yokes to normally maintain the gears with the teeth alined.

In testimoily whereof 'I alii); my signature in` presence of tivo witnesses.

BRUCE BQRLAND ll l)