US1004904A

US1004904A - Changeable key-lock.

Info

Publication number: US1004904A
Authority: US
Inventors: Walter Rees
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-10-26
Filing date: 1910-10-26
Publication date: 1911-10-03
Anticipated expiration: 1928-10-03

Description

W. REBS.

DHANGBABLE KEY LOOK.

APPLICATION FILED 00'1. ze, 1910.

1,004,904.l Patentedo@t.3,1911.

3 SHEETS-SHEET 1.

A WALTQ: F55?, m W22 A ii. N

/ W. REBS.

GHANGEABLE KEY LOOK. APPLICATION P'ILED oo'r. ze, 1910.

1,004,904. y Patented octfs, 1911.

-1 3 SHEETS-SHEET 2.

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fl. M7 W f MU EEES" ZM n' W. REES.

. CHANGEABLE KEY LOCK.

APPLICATION FILED 001326, 1910.

1,004,904. Y l Patented Oct. 3, 1911.

3 SHEETS-SHEET 3.

7 I. a MALTER Raes, A

sTAiEs PATENT OFFICE.

' i BEES, 0F YOBK,` PENNSYLVANIA.

To all wsomit v Beh it` known that I, WALTER Rans, of

'.York,"v .the :State of Pennsylvania, have invented a certainnew and useful Improvef followingI 1s a specification, reference had .to the'accompan ing drawings. Itfis the usual practice o lessors of safety ment -in `Changeable 'Key-Locks, whereof 4'deposit boxes to' provide them with locks Ymain key until said. detent mechanism is re- Awhi may 'b eopened with keys furnished( vtotv ;;.leS`ses;and, upon the' termination of any `of--a'givn box't'o provide 1t with aneig-ck' tog ln'sire that the former lessee has not agduplic'ate key with which the box maybe opened 'after it has been leased to another? person. -Moreover, when `it is desiredwto require the presence or consent of two persons toope'n'su'ch a' box, itis usual to provide itjwi'th a ldck having in addition to the mechanism subject to the control-of ay main key by Which'the lock 'slide bolt is shifted'back' and forth, guard or detent mechanism, subject to the control of a guard key, so constructed and l arranged as lto prevent" the operation of the lock by the y leased by they operation of the guard key.

My invention relates to a lock which may be advantageou'sly'used for the special pur` poses aforesaid in that it may be manually changed vto be operated by different main keys of a numerous series, Without beingdetached 'from -such'a box, and includes detent mechanism, .having ,two independent functions, subject to the control of'a master guard key, to Wit, first, preventing or per mitting such changes in the lock, and, second,- preventing or permitting the operation of the lock'by the specific main key for which it is set. [In 4other words, a lock constructed in accordance with my invention as hereinafter described is normally subject to control b two keys, to wit,'.an selected main key o a numerous series, W ereby the slide bolt may be shifted back and-- forth when the detentmechanism is released, and, a

master guard key capable of releasing said detent mechanism. `HoWeve`r` said two functions of said detent Imechanism being performed by independent means may be independently controlled byl different .guard keys, hereinafter respectively designateda change guard. key and a release guard key. Moreover, oneof said independent detent means mayfbe'omitted to permit the Spcification of Letters Patent.

lock to be repeatedly opened by the main key without t'he repeated operation ofthe guard key.V

As hereinafter described, my invention includes a lock of the Yale type having a main' rotary 'plu with a keyway and a straight series o radial pin tumbler sock'- ets; two straight series of pin tumbler sockets in the lock casing, arranged to respect-ivelyregister with the sockets in said main plug in different r'rotary ositions of the-lat# ter; said main rotary p 11g being arranged to normally 'coperate with pin tumblersin but one of said series of sockets in-the casing; changeable divisional unit pin tumblers in sald sockets, all of the same length, whereby'said lock is changeable to be operated by any one of a plurality of keys having notches the depths of which bear aliquot lrelation to sald tumbler sections; de-

tent mechanism arranged to normallylimit Patentedr Oct. 3, 1911;. i Application led October 26, 1910. Serial No. 589,121.

elo

sockets, constructed and arrangedv toeontrol A and operate said detent mechanismf in ac cordance with its rotary position.

-Myinvention includes the various novel features of construct-ion andi arrangement hereinafter more definitely specified.

In said drawings; FigureI is a front View of a lock convenientlyembodying my invention. Fig. II is an inverted plan sec- Ational view of said lock, taken on.' thline II, II in F igs.' I and III, l'showing a master guard key. F igrIII is va vertical transverse y sectionalV view of said lock, taken on the line III, III in Figs. ,I,'II,'and VI. FigsfIV;

Vand VI are vertical longitudinal sectional views of said lock, taken on the line VI, `VI

in Figs. I I and III; Fig. VI showing the lockI mechanism in theposition in whichl it appears in Figs. I, .II and III, and, Figs. IV and V Yshowingfsaid mechanism in other positions. Fi VII is a sectional view, taken on the 'llne VII, VII in Figs. II :and

III.'A Fig. VIII isa longitudinal sectional view of said lock, taken on the line VIII;

VIII, in'Fig. IX, showing a Vrelease guardl l key. Fig. IX is an inverted plan sectional view of said lock, taken on the line IX, IXl

in Fi VIII. Fig. X is a fragmentary sec.- tiona view taken on the line in Fig. IX. Fig. XI is like Fig. X, butshows a modified form of my invention.

In said figures; the lock casing- 1 has the removable face plate 2 detachab connected by the screws 3 with the casing frame 4. The main rotary plug 6 having the keywa 7 for the main key 8, and the series of ra ial pin tumbler sockets 9, is journaled in said frame 4 in which it` is retained at the front end bythe circumferential flange 11 having the

notches

12 and 13 to permit said key 8 to be inserted and withdrawn in the respectively locked and unlocked positions of said plug 6; said flange 11 being fitted to the notch 15 in said ke so that the latter must be inserted to the ull extent indicated in Fig. II before it or said plug 6 'may be turned in said frame 4. Asvshown in Fig. III said plug" 6 has the crank stud 17 at its inner end which fits in the slot 18 in the shank 1'9 of the slide bolt 2O as shown in Fig. VI, so that' said bolt may be shifted back and forth by the rotation of said plug 6. Said slide bolt 20 has the slot 21 engaging the stud 22 on the slide late 23 which as shown in Figs. II and V I is arranged to slide in the frame 4'transversely with respect to the direction of motion of said slide bolt 20 and has the spline 25 fitted to slide in said frame 4 to maintain it in proper position in said frame. It may be observed that saidslide bolt 20 cannot be shifted in either direction unless said slide plate 23 is tionary in the locked position shown in Figs. I, II, III,`VI and VII. The pin tumbler sections 28 in said sockets 9 of the main rotary plug -6 are rounded at their inner ends so as to readily slip into and out of the angular notches 29 in the main keys 8. The length of each of said tumbler sec tions 28 equals the radial thickness of said rotary plug 6 beyond the keyway 7, and the extent of said plug sockets 9 radially beyond said tumbler sections`28 is filled by the changeable unit pin tumbler sect-ions 30 whic are each as long as the minimum diference in depth of said key notches 29, and, as shown in Fig. II said sockets 9 are filled to the radial extent of the plu 6 with different numbers of said changea le pin tumbler sections 30 in accordance with the diferent key notches 29. Said frame 4 has the strai ht series of ymain in tumbler sockets 3 which register wit -said bearings 26and thepin tumblers 271when l slide plate '23 is in locked position as shown in Figs. yII and VII. Said' sockets 32 contain pin tumbler driver sections 34 which are pressed' toward the rotary plu 6 by rel spective springs 35 so that when t e proper key 8 is inserted in the keyway 7 as shown in Fi II, the tumbler sections 27 which exten in the bearings 26 of the slide late 23 and are coextensive with the thic ess of the latter, do not project from said plate, and the latter may be shifted` back and forth by engagement in the cam slot 21 in the bolt shank 19 as the latter `is shifted back and forth by the crank lstud 17 on the mam rota-ry plug 6, as the latter. is. turned by the key. However, when said key 8 is withdrawn with the bolt 20 and slide plate y 23 in said locked position as shown in Fig. II, said springs 35 shift the pin tumblers 34 and 27 toward the plug 6 to engagethe slideplate 23 and said plu 6 in theframe 4 and f revent their unloc 'ng movement. Therea er, it isl impossible to unlock the bolt 20, except when the to project from the slidplate 23 and thusv revent its movement. oreover, as shown 1n Fi VI the unlocking movement of said slide olt20 is normally revented by the detent 37 which engages tje bolt shank in its protracted locked position. Said detent is conveniently 'a lever fulcrumed on the stud 38 and havingjthe sprin 439tending to present itin enga ement wit the shank 19 of -said bolt 20. owever, said detent 37 is subject to the control of the guard rotary plug 40.having the keyway 41 for the master key 42, and the series of radial pin tumbler sockets 43. Said plug 40 is journaled in saidyframe 4 in which 1t is retained at the front endy by the circumferential flange 45 having the notch 46 to permit said key 42 to be inserted and withdrawn` when sa1d plug y Figs. I, II and VI; said 'flange 45 being tted to the notch' 48y in said key 42 so that the latter must be inserted 'to the full extent indicated in Fig. II before it or `said plug 40 may be turned in said frame 4. It may be observed that when said plug 40 is roper key 8 is inserted in the keyway 7 o the main rotary 40 is in the position shown in' turned tothe position shown in Fig. VI,

which is the normal position said detent 37 is free to prevent the unlocking movement detent 37- from engagement with the shank 19 of said bolt, against thepressure of said sprln of sai t 20, -b the key A8.

Thepin tumb er sections 51 -inthe guard rotary plug 40 are rounded at, their inner..

so that the cam 49 at the inner end of said plug 40 releases said 9 to permit the opemngmovement y `ends so as to readily slip .into-and out ofare stored therein under the angular notches 52 in the vgi'iard key 42. The length of each of said' tumbler 'sections 51 conveniently equals the radial thickness of said plugv 40. from the bottom of its 'reL spective key notch 52 to the, periphery of said plug, and, in the no'rmal'position.ofv said plug shown in Fig. II the tumbler sockets 43 and the tumblers 51 insaid plug '40,

register with the straight series`of auxiliary tumbler sockets 54 inI theframel 4. Saidsockets 54 contain pin tumbler 'driver 'sec-v .t-ions55 which are pressed toward the-rotary plug 40 by respective springs 56 so' that when the proper guardkey 42 is inserted. -the keyway 41 in said'plugf40 as V'shown in Fig. II, the latter is yfree 1to'tu'rn,

but, when said `key 42 is withdrawn'or any other key with different notches is inserted in said plug 40 the latter is prevented from turning by the pin tumbler' driver vsections.

55 which project `in the sockets 43 in said plug. Y.

Referring to Fig. II it may that when the deepest notches in the key 8 permit the sections 28 to assume their innermost position, but three ofthe changeable tumbler sections 30 are required to-ill'the sockets 9 to the radial extent of the plug 6. However, four such sections are-'provided for each notch in the key 8, the extra ones always remaining in said auxiliary sockets 54 as driversfor the other sections 30 which pressure of said springs 55.

The sole function, of said detent 37 being to normally engage and detain the slide bolt- 20 in its protracted, locked position; the normal extent of the unlocking movement of Vsaid slide bolt 20 is limited by the detent 58 when in the position shown in Figs. yV

frame. Said detent 58 thus normally prevents y a change of key. However, said detent 58 being conveniently a lever fulcrumed on the stud 59 and having the spring 60 tending to present it in engagement with the shank 19 of said bolt 20, as shown in Fig. V,is

subject to the control of the guard rotary i plug 40 which must be turned by the guard keyv 42 to the abnormal position shown in Fig. IV, wherein the cam 49 on said plug 40 releases said detent 58 from engagement with the shank 19 of said bolt'20 against vthe pressure -of said spring 60 to permit the turning movement of said main rotary plug 6 tothe position shown in Fig. IV to present its sockets 9 in registry with said auxiliary sockets 54 and thus permit a changeof key. -Said plug 6 being thus turned with the main key 8 to register with said auxiliary sockets, said key may then be withbe observed A -drawn, and, a new main key with dilerent -notches 29 bein vnotches are ille thus set for'operation by said -new main key.

l It is tovbe understood that the number of jditferentmain keys to which such a lock may be thus set is only limited by the perlm'utability 'of the tumbler sections 30, which :bear an aliquot relation to the depth of the notches 29 in all of said series of main keys.

The form ot my invention above described operates as follows 'The lock being set for the main key 8 to present the tumblers 2T vin the position shown in Fig. II; and, the master guard key 42 being inserted as shown in Fig. II and the lock being in the normal 'locked position shown in Figs. I, II, III, VI

and VII may be unlocked by first turning theguard plug 40 with said key 42 to the position shown in Fig. V and then turning the main rotary plug 6 with the main key 8 to the position shown in Fig. V. If the guard plug 40 is then returned with the guard key 42 to the normal position shown `in Fig. VI, before said key 42 lis withdrawn; upon returning the slide bolt 2O to the locked position shown in Fig. AII it cannot be .again unlocked until said guard plug is first turned as above described. However,

said detent 37 may be omitted to permit the lock to be repeatedly opened by the mam key 8 without the repeated use of any guard key. In other words, the embodiment of my invention shown and described may be instant-ly changed from a double key lock to a single key lock by merely omitting said detent 37 without disturbing any other portion of the lock. This feature of my in vention is obviously advantageous when 1t 1s desired to temporarily permit one person to open a safety deposit box to open which the presence or consent of two persons is normally required;

In the operation above described the `person having the master guard key 42 would have control of both of the aforesaid functions of the detent mechanism, to wit, first, preventing or permitting such changes 1n 1 the lock tumblers as to adapt the lock to be opened by ditl'erent main keys, and, s econd, preventing orpermitting the operatlon of ,the lock by thespecific main key for which it is set. However, under some circumstances, lit is desirable to have sald two functions controlled b different persons provided with respectively different keys, and,

providing the guard plu mani ulation as to said two detent means by two e s respectively designated a change guard ey and a release guard ke Such operation may be conveniently e ected by eral recesses 62 and 63 w ich are indicated in Fi II, VII, VIII and IX and which/` exten circumferentially upon respectively opposite sides of dit'erent tumbler sockets 43 in said plug as indicated in Figs. VII and VIII; sothat when the tumbler sections 55 are thrust from the plu 40 to the circumference of `the latter y the master guard key 42 as shown in Fig. II said plug may be turned in either direction to operate either of said

detents

37 and 38, but, when said tumbler sections 55 are thrust tothe position shown in Fig. IX by the release guard key one of sa1d sections 55 engages said plug to the depth of the recess 62 so that, although said -plug may be turned by said release guard key in the direction indicated by the arrow in Fig. VIII to release the slide bolt shank 19 from the detent 37, by the cam 49 of said lug 40, to permit the opening movement 0F said slide bolt 20; said guard plug 40 cannot be turned in the opposite direction because of the engagement of said tumbler section 55 therewith.'

On the other hand, by the insertion of the change guard key 66 indicated in Fig. X all of the tumbler sections 55 are thrust out-` the sockets 43 in the plug 40 as shown in' Figs. VIII and X; they may be `otherwise formed, for instance as indicated at 67 in Fig. XI. Said recess 67 extends at right angles to the axis of the socket 43, and, it may be observed that although such construction, of said recess 67, is less costly, the local tumbler section 55 is moved by the plug 40 as the latter is turned and may be worn unevenly upon its end which comes in contact with said plug.

I do not desire to limit myself to .the precise details of construction and arrangement herein shown as it is obvious that` various modifications ma be made therein without departing from t e essential features of my invention as defined in the appended claiins.

1. In a-changeable key lock, the combination with a casing; of a main rotary plug,

'having a keyway and a straight series of B5 radial pin tumbler sockets; two straight se- 40 with periphnism arranged to normally limit the rotary movement of said main plug to registerwith the main series of casing sockets but to abnormally permit rotary movement of said plug to register with the other series of casing sockets, and, to normally prevent the opening movement' of the slide bolt but abnormally permit such movement; and, a guard rotary plug having a keyway, a single straight series of radial pin tumblersockets and pin tumblers, constructed and arranged to control and operate said detent mechanism.

2. In a changeable key lock,l the combination with a casing; of a main rotary plug, having a keyway and a pin tumbler socket;

two pm tumbler sockets in said casing, ar-

ranged to respectivelyA register with the socket in said main plug in different rotary positions of the latter; pin tumblers including changeable unit sections insaid sockets, all of the same length, whereby said lock is changeable to be operated by any one of a yplurality of keys having notches the depths of which bear aliquot relation .to said changeable tumbler sections; detent mechanism arranged to normally limit the rotary movementA of said main plug to re ister with the main casing socket but to a normally permit rotary movement of said plug to register with the other Icasing socket, and, to normally prevent the opening movement of the slide bolt but abnormally permit such movement; and, a lguard rotary inga keyway, a pin tumbler soc `et and a pin tumbler, constructed and arranged to control and operate said detent mechanism,

3. lIn a changeable key lock, the combination with a casing; `of a main rotary plug, having a keyway'and a pin tumbler socket; two pm tumhler'socketsin said casing, arranged to respectively register with the socket in said main plug in different rotar ositons'of the latter; pin tumblers inclu ing changeable unit sections in said sockets, all of the same length, whereby said lock is changeable to be operated by any one of a plurality of `keys having notches the depths of which bear aliquot relation to said changeable tumbler sections; detent mechanism arranged to'normally limit the rota movement of said main plug to re ter with the main casing socket but to alxsiormally permit rota movement of said lug to register witht e other t;.and, a

lug havizo v-4.Inachan guard rotary plu Y having a keyway, a pin tumbler socket an a pin tumbler constructed and arranged to control andoperate said detent mechanism. y

ble lock, the combination with a casing; of a main rotary plug, having a keyway and a pin tumbler socket; two pin tumbler sockets in said casing, arranged to respectively register with the socket in said main plug in diierent rotary itions of the latter; pin tumblersinclud mg changeable unit'sections in said sockets, all of the same length,'whereby said lock is chan eable to be operated by any one of a plura ity of keys having notches the depths of which bearv aliquot relation to said changeable tumbler sections; detent mechanism arranged to normally prevent the openin movement of the slide bolt but abnormal y permit such movement; and, .a 'guard rotary plug having a keyway, a pin tumbler socket and a pin tumbler constructed'and arranged to control and operate said detent mechanism.

5. In a lock, the combination rotary plug having a keyway; oftwo inde-A pendent series of pintumblers common to said plug and arranged to respectively co` operate with a key inserted therein, in different rotary positions of said plug; detent mechanism arranged to limit the rotary movement of said lug to register with but one or both of said series of tumblers; in accordance with the position of said detent mechanism; a guard rotary plug having a keyway and arranged to control said detent mechanism; and, a series of pin tumblers arranged to coperate with a key inserted in said guard plug, to prevent and permit rotation of the latter.

6. In a lock, the .combination With a main rotary plug having a keyway; of two independent tumblers common to said plug and arranged to respectively coperate with a key inserted therein, in diferent positions of said plug; detent mechanism arranged to limit the rotary movement of said lug to register with but one or both of said tumblers, in accordance with the position of said' detent mechanism; a guard rotary plug having a keyway and arranged to control said detent mechanism; and, a tumbler ar-l register with but one or both of said tumblers, in accordance with the position of said detent mechanism; and, a guard tumbler arwith a main I ranged to coperate with la 'guard key to control said detent mechanism.

8. In a changeable key lock, the combina- Y tion with a main rotary plug, having a keyway and a radial pin tumbler socket; of a casing vhavin two radial pin tumbler sockets, arrangev to respectively register with the socket in said plug in different rotar positions of the latter; in tumblers inclu ing changeable unit sections in said sockets; springs thrusting said tumblers toward said plug; pivoted detent mechanism arranged to limit the rotary movement of said plug to register with but one or both of said casing sockets; a guard rotaryplug, having a key.

casing having two` radial pin tumbler sock- Y ets, arranged to respectively register with the socket in said plug in different rotary positions of the latter; pin tumblers including changeable unit sections in said sockets; springs thrusting said tumblers toward said plug; detent mechanism arranged to limit the; rotary movement of said plug to register- With but one or both of said casing sockets; p

a guard rotary lug, having a keywayand a radial pin tum ler socket; and, a pin tumbler in said guard plug socket arranged to coperate with a key to prevent and permit the rotation of said guard plug and operation of said detent mechanism.

l0. In a changeable key lock, a main rotary plug having a keyway and a tumbler changeable to be operated by different keys.;

a slide bolt; pivoted detent mechanism arranged to normally prevent opening move- Y ment of said bolt; and, a guard rotary plug having a keyway and a tumbler arranged to coperate with a key 'to'control said detent.'

mechanism.

11. In a changeable key lock, a main rotary plug having a keyway and a tumbler changeable to be operated by different keys; a slide bolt; detent mechanism arranged to normally prevent opening movement of said bolt; and, a guard rotary plug having a keyway and a tumbler arranged to coperate with a key to control said detent mechanism.

12. In a changeable key lock, a main rotary plug having a keyway and a tumbler changeable to be operated by different keys; a slidebolt; detent mechanism including means arranged to normally prevent opening movement of said bolt and means arranged to normally prevent changes in said tumbler; and, a guard rotary plug having a' keyway and a tumbler arranged to cooperate with a key to control said detent hmechanism arranged to normally prevent may be operated independently -of the other. v

`l`opening movement of said bol and, ar-

ranged to coperate with another e to control said detent mechanism arran e to normally prevent changes in sai tumbler; whereby, either of said detent mechanisms 13. Ina changeable key lock, a tumbler means arranged to normally prevent opening movement of said bolt and means arran ed to normally lprevent changes in saidV tum ler; and, afguard rotary plug having a either of said detent mechanisms may be op erated independentl of the other. 14. In a changea le ke changeable to be operated y different keys; a slide bolt;. detent mechanism including means arranged to normally prevent opening movement of said bolt and means arran ed to normally prevent changes in said Aaus tum ler; and, a guard tumbler arranged to coperate with a key to control said detent mechanism arranged to normally prevent opening movement of said bolt, and, arranged to coperate with another key to control said detent mechanism arranged to normally prevent changes in said tumbler;

whereby, either. of said detent mechanisms may be operated independently of the other.

15. In a lock, the combination with a casing; ofa slide bolt; detent mechanism arranged to normally limit the movement of said bolt; a rotary plug having a keyway, a

plurality of tumbler sockets each lhaving a' -peripheral recess extending circumferentially at one side thereof, said recesses of dilerent sockets extending in respectively opposite directions; tumblers in said casing engagin the respective plug sockets to the depth o the respective recesses; whereby, rotation of said plug is prevented by said tumblers; a key arranged to fit in said keyway and shift such tumblers out of engagement with said plu as to` permit rotation of the latter in one inection; another key arranged to fit in said keyway and shift such tumblers out ofen agement with said lug as to permit rotation of the latter in t e opposite direction; and, a master key arranged to fit in said keyway and shift such tumblers out o'f engagement with said plug as to permit rotation of the latter in either direction.

16. In a lock, `the combination with a casing; of a slide bolt; detent mechanism arranged to normally limit the movement of said bolt; a rotary plug having' a keyway, a

able to be operated by different keys; a sli el bolt; detent mechanism includmg lock, a tumbler ilim plurality of tumbler sockets each having 'a peripheral recess extending circumferentially at one side thereof, said recesses of different socketsfextending inrespectively opposite directions; tumblers in said casing en gaging the respective plug sockets to thev` epth of the respective recesses; whereb rotation of said plug is prevented bysaid tumblers; a key arranged to it in said keyway and shift such tumblers out of engagement with said plug as to permit rotation of the latter in one direction; and, another key arranged to t Vin said keyway and shift such tumblers out of engagement with said plug as to permit rotation of the latter in the opposite direction.-

17. In a lock, the combination with a casing; of a slide bolt; detent mechanism arranged to normally limit the movement of said bolt; a rotary plug havinga keyway, a plurality of tumb er sockets eachv having a peripheral recess extending circumferentia'lly` at one side thereof, said recesses of different sockets extending in respectively opposite directions; tumblers in said casing engaging the respective plug sockets to the depth of the respective recesses; whereby, rotation of said lug is prevented by said tumblers; and, a key arranged to fit in said keyway and shift such tumblers out of engagement with said plug as to permit rotat-ion of the latter in one direction.

18. In a lock, the combination with a casing of aslide bolt; detent mechanism arranged to normally limit the `movement of said bolt; a rotary lug having a keyway, a tumbler socket, and)a peripheral recess extending circumferentially at one side of said socket; a tumbler in said casing engagingy said plug to the depth of said recess; whereby, rotation of said plug .in one direction is prevented by said tumbler; and, a vkey arranged to fit in said keyway, shift l.said tumbler out of -ngagement with said plug and permit rotation of the latter in a dlrection opposite to said recess. y

'19. In a lock, the combination with a casing; of a slide bolt; detent mechanism arranged to normally limit the movement of said bolt; a movable member having a keyway, a tumbler socket, and a recess extending at one side of said socket; a tumbler in said casin engaging said plug to the depth of sai recess; whereby, movement of said member in one direction is prevented by said tumbler; and, a key arranged to fit in said keyway, shift said tumbler outof` engagement with said member and permit movement of the latter in a direction opposaid plug to the depth of said recess; whereby, rotation ofsaid plug in one direction is prevented b vsaid tumbler;v and, a lkey arran to t in said keywa ,shift said tum leroutl of engagement Jw1-th\said plug the di- Correction In Letters Paten tNo.1,004904,. i.

socket; a tumbler engaged in said Socket to the depth of said recess; whereby, rotation '15 of said plug Yin one direction is prevented by saidtumbler; and, a key arranged to fit in L said .keyway and release said tumbler.

lIn testimony whereof, I have hereuntog signed my name at York, Pennsylvania, this 20 seventeenth day of October,'x1910.

`WALTER BEES.

Witnesses: l

Y CHAS. W. ROLLF,

JAMES P. PARKER.

.It is hereby certified that in Lemus- ,Phmt No. 141135904,r Yva' .1911, upon the application of Walter of York, Pennsylvania; inulprove-v l l meut in Y Changeable ,Key-Locks an error appears Ain *the` printed specification` correction follows: iPage 1, line 8;,Jfor the word guidelread guai-d;l v and 'thesaid Patent should read' with correctionv the-rein that lthe may conform to the record of theease inthe Patent Oiiee.. l l

vSi'gntl' Ymimi. this 24th dq f October, A. D., 1911. s

VE., B. MooBE, l

/ Y Commissioner of said plug to the depth of said recess; whereby, rotation ofsaid plug in one direction is prevented b vsaid tumbler;v and, a lkey arran to t in said keywa ,shift said tum leroutl of engagement Jw1-th\said plug the di- Correction In Letters Paten tNo.1,004904,. i.

`WALTER BEES.

Witnesses: l

Y CHAS. W. ROLLF,

JAMES P. PARKER.

vSi'gntl' Ymimi. this 24th dq f October, A. D., 1911. s

VE., B. MooBE, l

/ Y Commissioner of lc ie hereby eer-Lined thee in Lettere pebeet Ne. 1,004,904, grenze@ Qember ,P

1911, upon the application of Walter Rees, of Yofk, Pennsylvania, Vforimpl'ov'ei mont in Chngeable Key-Locks an error appears in thc printed specification lrequili'ing orlction's follows: Ylnge 1, liuc 84,4for tho word guide road guard; and that the Letters Patent chou-ld be read with this correction therein that izhe same may conform to the ljecord of the in tho Patent Oce..

signed end eeelea mie 24th dey ef october; A. D., 1911.

E- B. MOORE? Commissions of Patank.