US2357305A

US2357305A - Lock

Info

Publication number: US2357305A
Application number: US377255A
Authority: US
Inventors: Harry A Barrett
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-02-03
Filing date: 1941-02-03
Publication date: 1944-09-05
Anticipated expiration: 1961-09-05

Description

sept. 5, 1944.

H. vA. BARRETT LOCK Filed Feb. 3, 1941 3 Sheets-Sheet 1 Patented Sept. 5, 1944 UNITED STATES PATENT OFFICE4 Application February 3, 1941, Serial No. 377,255

(Cl. Y-21) 8 Claims.

This application for Letters Patent is a continuation in part of application for Letters Patent filed by me on February v6, 1939,` Serial No. 254,974 for patent on Locks, which application is issuing as United States Patent No. 2,230,227 on February 4, 1941.

My invention relates to locks having permutation or combination or master-key release means.

One object of my invention is to provide a lock o-f the combination or permutation type, having means operable to assure positive disarrangement of the lock tumblers whenever the lockable member is released, soras to require a complete re-setting of the combination after each release.

Another object of my invention is to provide a lock of the combination or permutation type, so constructed as to permit return of a released lockable member to locking position regardless of the position of the tumblers.

A further object of my invention is to provide a combined master-key lock comprising combination or permutation means or both, which is springless, pick-proof, rugged and yet vconstructed of a minimum number of parts, as well as facile and inexpensive to manufacture.

Another object of my invention is to provide a combination master-key and permutation o-r combination lock which is incapable of Vbeing opened by an unauthorized person in possession of the master-key.

A further object of my invention is to provide a padlock having a sliding shackle and means operable to prevent inadvertent locking of a portion of the shackle While another portion is free.

With the above and other objects in view, my invention consists of a lock housinghaving movably mounted therethrough a locking member;

mutation tumblers are in release condition; a dog-catch adapted to engage said dog and limit movement of said bolt When said tumblers are in locking condition and positive means to bring said dog-catch into locking engagement with said dog.

My invention further consists of a lock comprising combination or' permutation tumbler means adapted alternately to be placed into release, and into locking Icondition; a bolt; a

dog pivotally connected With said bolt alternately rockable and unrockable Within denite arcs according to the respective release and locking conditions of said tumblers; a lever disposed within the path of said bolt and adapted to be rocked thereby when said bolt is brought into locking position; a dog-catch pivoted on said lever and having disposed at opposing sidesof its pivot a bearing edge and a dog-detainingv nger respectively; an eccentric adapted to bear against said lever when in one position operably a plurality of tumbler disks rotatably mounted in said housing, and containing registerable indentations on their peripheries, means in pivotal connection with said locking member operable to engage said peripheries when in locked condition and to move into said indentations when in release condition, and means positively to move said tumbler disks into locking position when said locking member is moved into release position. n l My invention also consi-sts of a lock comprising permutation tumblers adapted to be brought alternately into release and locking condition; a bolt; a dog pivotally secured to said bolt and rockable into release condition when said perto urge said' dog-catch intoengagement with said dog,-and to release said lever when in. another position operably to release said dog from engagement With said dog-catch; a key; means .operable to permit said key to move said eccentric from one position thereof to the other; and means selectively to permit utilization of said key with said eccentric.

My invention also consists of a combination of to a permutation series other than that required for operating the permutation means alone.

My invention further consists of a permutation lock comprising means operable to limit to one direction the movement of at least a portion. of said permutation means operably to prevent the release of said lock on a reverse combination of said permutation means.

My invention also consists of a lock having a sliding and rotatableshackle and means for preventing there-insertion of said shackle While it is rotated out of locking condition.

For the purpose of illustrating my invention, I have shown in the accompanying drawings forms thereof which are at present preferred by me, since the same have been found in practice to give satsfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrange- Inents and organiations of the instrumentalities as herein shown and described.

Referring now to the drawings in which like references indicate like parts:

Figure 1 represents a front elevational view, partly broken away, of a lock embodying my invention and adapted for use in locker doors of the latch bar type. v

Figure 2 represents a sectional View taken along the line 2 2 of Figure 1.

Figure 3 represents a vertical sectional view of the lock embodying my invention, take'n along the vline of 3 3 of Figure 2.

Figure 4 represents a sectional view of the lock embodying my invention taken generally along the line of 4 4 of Figure 3.

Figure 5 represents a vertical sectional Aview of a portion of the lock embodying myinvention,

when in locking condition, taken along the lines 5 5 of Figure 2.

Figure 6 represents the locking mechanism illustrated in Figure 5 when in release condition.

Figure 7 represents a sectional View of the key engaging portion of the lock embodying my invention and is taken generally along the line 1 1 of Figure 5.

FigurefS represents a fragmentary view of the key (with the bow :broken away) adapted to be used with the key engaging means illustrated in Figures 4-5-6-7.

Figure 9 represents a sectional fragmentary View of the key and key engaging means taken generally along the `line 9 9 of Figure 7 and indicating the position of the key just before it is completely inserted into operating position.

Figure 10 represents the key and key engaging means as illustrated in Figure 9 when said key is completely inserted into operating position.

Figure 11 represents the permutation tumbler disks of the lock embodying my invention Ain proper alignment for releasing the bolt by means of the permutation disks. In this view the disks have been taken out and laid side by side for clarity of illustration.

Figure 12 represents the :permutation disks of the lock embodying my invention in proper alignment for the use therewith of a key for the purpose of permitting the said key Yto bring said lock into release condition. In'th'is view'likewise the disks have been taken kout and laid side by side for clarity of illustration.

Figure 13 represents an elevational View of a spacer kwasher embodied in the permutation tumbler mechanism of thelock embodying myinvention.

Figure 14 represents a permutation `tumbler of modi'ed construction of a lock embodying my invention.

Figure 15 represents a fragmentary view of a lock embodying my invention as adapted for use as a padlock.

Figure 16 represents Ia sectional view of the shackle of the padlock illustrated in Figure 15, taken generally along the .line I6 |6 of Figure I5.

Figure 17 represents the tumblers of va permutation means of modi'ed construction of a lock embodyingmy invention,.in position forV 'a release condition, and laid Vside by side for clarity of illustration. Y

Figure 418 `represents a perspective view of the top, or drive, tumbler of a permutation means illustrated in Figure 17. f

Figure 1'9 represents the key adapted to' be used in conjunction with the rpermutation means illustrated in Figures 17 and 18.

Figure 20 represents an elevational View of th bearing and ward adapted to be used in conjunction with the key illustrated in Figure 19.

Figure 21 represents an elevational View of the cover-plate for use with the tumblers illustrated in Figures 11 and 12.

Figure 22 represents a front elevational view of the lock mechanism of modied construction embodying my invention showing the relation of the dial, key and key-way.

Figure 23 represents a vertical sectional view of a lock of another modified construction embodying my invention, as applied to a padlock.

According to my invention I provide a lock 30 having a dial 3| secured by means of a bezel or another suitable means 32 to a door 33 of a locker or other compartment 34 and having a bolt 35 vertically slidably mounted in a lock housing 36 andin engagement with a locking bar 31 to which is secured a suitable handle38 operably to enable the locking or unlocking of the door`33 to a suitable jamb .3'9 in the compartment 34, all as substantially-described in my co-pending patent application issuing Vas Patent No. 2,230,227. The lock housing 3'6 comprises a vbottom or bed-plate 4Q side-walls 4I and -42 and cover-plate 43. Secured to .the cover-plate by any suitable means such as the lugs 44 a` hollow, tubular Adisk-housing 45 projects towards the bed-plate and comprises a generally .cylindrical wall 4B extending through an arc greater than but short of 360 thereby to define an opening 41 facing the side-wall 42 lthrough an aperture of which the bolt 35 is sli'dably disposed. The cylindrical wall 46 .is preferably longitudinally 'outwardly beaded on opposed sides thereof between the 'axis and the opening I41 of .said tube, as at 48, operably to define inner grooves 49 whichare adapted to receive and retain nodes 5D outwardly projecting from suitable spacer washers 5I. The bottom of the tube 45 is inwardly bent to form a base 52 adapted to receive and retain the bottom tumbler 53 o'f a series of

permutation disk tumblers

53, 54v and 55 respectively.

The dial 3l has projecting from the rearward face thereof a drive pinladapted to revolve about a smaller circle withthe rotation vof the dial, said drive pin'56 being. of suflcientllength to project through the :door 33, cover-plate 43 and into the pathof rotation of the top tumbler disk 55. The cover-'plate k.'13 and the tumbler disk 55 are centrally apertured as at |65 and 51 respectively to a diameter .preferably but slightly greater than thezpath of revolution ofthe vdrive vpin 56. A radial lug 58, preferably co-planar with the disk 55, projects into. the aperture 5.1 into the path of revolution of the drive pin 56 and is adapted to beengaged and driven thereby. A lug 59 projects downwardly from the lower face .of the disk 5.5 operably .to engage an upwardlyprojecting lug 60 on the face of th'e intermediate tumbler disk 54Y according to ka Well-known permutationv disk principle. In likemanner the downwardly projecting lug 6| on the disk54 engages an upwardly projecting lug 62 on'the 'disk 53. Registerable notches or Yother indentations 63 are formed in the outer yperipheries of the-

tumbler disks

53, 54 andl 55. Radially disposed grooves '64,"65 and '66 are formed along' the inner peripheries in the

tumbler disks

55, 54 and 53 respectively, 4in varying positions with .respect to the notches B3 thereof and a corresponding radially disposed groove `H56 is formed on the Acover-plate 43. On lthe lower face of .the .bottom .tumbler 53 I provide preferably a plurality of downwardly projecting lugs 61 disposed preferably co-radially and in substantial proximity to the outer periphery of the disk 53.

.An outwardly projecting ear 68 is formedon the loweredge of the tube 45 and has pivoted to the lower face thereof a detent 69 comprising 'similarly projecting catches 1.8 and 1| ,adapted alternately to intercept the path of revolution of said downwardly projecting lugs 61 in a manner to prevent complete revolution of any one of said lugs in one direction while permitting the complete revolution of all the said lugs in another di,- rection said complete revolution, however, causing the detent 69 to rock a plurality of times and effectuating a series of deceiving clicks when it is attempted to pick the lock. To increase said clicks and also to provide a limiting stop to the rotation of said detent 69 I provide an arm 12 adapted to bear against the side-wall 4| of the housing when said detent is at the preferred limit of one of its rocking positions. It will be noted further that by means of detent 69 it is impossible for the bottom tumbler 53 .to be rotated in more than one direction and thus, it is impossible for the lock to be picked by means of discovering the reversely turned combination whereby the notches 63 may be brought into registry. Thus, the possibility of picking the lock is thereby reduced by one-half.

The bolt 35 comprises a sliding base 13, disposed within the housing 36 in juxtaposition to the side-wall 42, and the outwardly projecting latch member 14, the latter being adapted to slide within a suitable slotted aperture within the side-wall 42. The sliding base 13 is longitudinally slotted as at 16 and is mounted on guiding studs 11 operably to be retained in position against the side-wall 42.

A dog 18 is preferably pivoted between the ends thereof as at 19 to the slidable base 13.

A fence 88 -projects upwardly from the dog 18V and is adapted to be rocked into the registered notches 63 of the

tumblers

53, 54 and 55 when .said notches are in juxtaposition thereto. A preferably curved arm 8| projects substantially towards the longitudinal axis of the housing 36 and has a plurality of iunctions as hereinafter described. The lower end of the dog 18 is formed into a hook 82 likewise projecting substantially toward the longitudinal axis of the housing 36..

A lever 83 is pivoted at the lower end thereof as at 84 to the bed-plate 48. A dog-catch 85 is pivoted on the lever 83 as at 86 preferably substantially below the lower edge of the arm 8| and above the hook 82 'when the bolt 35 is in its lowermost position. A cam 81 is disposed on the upper side edge of the dog-catch 85 and is adapted to be engaged by the lower edge of the arm 8| of the dog 18 operably to rock dog-catch 85 in a counter-clockwise direction and to bring the step 88, comprising the lower edge of the dog-catch 85, into locking engagement with the hook 82 of the dog 18, when the bolt 35 is moved into its lowermost position. When the fence 88 is rocked into the registered notches 63 of the .tumbler disks, however, the dog 18 is rotated about its pivot 19 operably to swing the hooked `end 82 thereof sidewardly away from the step v.88 and out of locking engagement therewith thereby to free the dog and the bolt on which it is pivoted operably to permit upward sliding thereof. v

As theY dog 18 moves upwardly the heel 89V o the hooked end 82 is engaged by the upwardly inclined cam 98 projecting inwardly from the which may be a master-key, 96.

side-wall 42, and is rocked in a. clockwise direction thereby to draw the fence 88 out of engagement with the tumbler notches 63. Further upward movement .of the bolt 35 causes the upper edge 9| `of the arm 8| to engage one of the downwardly projecting lugs 61 on the bottom tumbler disk 53 and to carry it upwardly with the dog 18, operably positively to disarrange the

tumbler disks

53, 54 and 55. Thus, the tumbler notches 63 are not only brought out of release position with respect to the fence 80, but they are also disarrangedv so that there is no possibility of the fence passing thereinto without the proper permutation series being again set.

Upon the lowering of the bolt from release position toward locking position, the fence 88 engages the outer peripheries of the

tumbler disks

53, 54 and 55 and is cammed in a clockwise direction operably to rock the hook 82 toward engage-v ment with the step 88 of the dog-catch 85, thereby causing said dog-catch likewise to rotate in a clockwise direction to permit the hook 82 to pass the step 88. Further downward motion of the dog 18, carriedV by the bolt 35 causes the arm 8| to bear against the cam 81 ofthe dog-catch and to rock said dog-catch in a counter-clockwise direction operably to cause the step 88 to engage with hook 82 and to lock it, as hereinbefore described. Thus, the bolt is locked.

An eccentric 92 is pivotally mounted on the bed-plate 48 concentric with the

tumbler disks

53, 54 and 55. A step bearing 93 is formed within the pivot 94 on which the eccentric 92 is mounted and is adapted to' receive the pin 95 of a key, A notch 91 is formed on the eccentric 92 and is adapted to receive a crank pin 98 projecting from the said key 96.

The eccentric 92 bears downwardly upon a cam 99 formed onthe upper side edge of the lever 83 and is adapted, when in its downward position,

to cam said lever 83 into juxtaposition to the slidable -base 13 of the bolt 35; and when in its raised position, to permit rocking of said lever 83 in a counter-clockwise direction away from juxtaposition to said slidable bolt 35: Thus, when the eccentric 92 is in its lower position, the dog-catch is in operating position with respect to the dog 18; and when the eccentric 92 is in its raised Iposition, the dog-catch carried by the lever is swung out of operating position with respect to the .dog 18, as more clearly illustrated in Figure 6.

Suitable wards |88 are xedly secured to the bed-plate 48 and are adapted to co-operate with inter-meshing wards |8| disposed on the key 96.

A bell-crank |82 is pivoted to the rear face of the ward |88 and comprises a finger |83 adapted to project downwardly through a suitable aperture or against a suitable bearing edge`|84 in the eccentric 92 when said eccentric is in its downward position, and to project also through a suitable aperture |85 in a portion of the bed- -plate, operably to lock said eccentricagainst inlower nger |86, and to be rocked thereby into engagement with the notch |08 of the key 95. Upward Ymovement -of the key, as in its withdrawal, causes the ward |09 -forming one side of the notch |08 to engage the upper `iinger |f0'| `and to rock the bell-crank |02 .in a counterclockwise direction into locking engagement -with the eccentric 92.

In operation, the key 86 `is inserted in the following manner: the lclia'l 3| vis rotated Vaccording to its pre-determined series which, .in the case of a master-key, would be the same in -all of the locks intended to be opened by the proper possessor of the said master-key; said pre-deter mined series being such as would bring the aperture notches 64, A|55 and V|56 of the tumbler disks into Vregistry as indicated more clearly in `Figure 1'2, `and into registry with the notch |66 of the `cover-plate 43. By this means, not only may no key be inserted until the proper master combination has been set, but because of the groove |66 in the xed cover-plate, being a part of the registering combination, no unauthorized key may be inserted therethrough and turned therein to draw the other registering notches ad seriatum .into the lproper combination. After the proper combination is set, the key may then be -passed through the notches and the apertures until it comes into operable registry with the wards |00. The crank pin 98 of the key 96 is -thus brought into engagement with the eccentric 9'2 and rota- Ltion of the key causes the eccentric to rotate o'perably to permit the lever 83 and its do-g-catch l85 to rock out of locking engagement with the dog 18, thus to permit said dog and its bolt to be slid upwardly into releaseposition. To aid in this, I may also provide a trip-stud |68 to rock the dog-catch step away from the dog-hook. Reverse rotation of the key 96 causes the eccentric to cam against the lever 83 thereby to bring the dog-catch 85 into operably locking position with respect to the dog 18. If desired, a linger |64 may be .disposed on the lever 83, in the downward path of the bolt 35 operable to permit the slidablev base T3 thereof to bear there-against and to rock the `lever 83 back into operating position.

In Figures 17 to 20, inclusive, and Figure 22 is illustrated a modied construction embodying my invention whereby the key operated permutation means employs a slightly diierent principle. Thus, I provide a key llzhaving suitable wards |3 adapted tom'esh with `wards Mupwardly projectingifrom a step bearing I5 mounted on the bed-plate 40, said step bearing ||5 being adapted to receive the pin |16 of vthe key ||2. The stern of the key 2 passes through a suitable key-way ||8 upwardly projecting through the knob of the-dial |9 and lin registry 'with a key slot |28 formed in said dial. The lower end of the key-way |`|8 is xedly secured to the top tumbler |2| of a series of permutation disks |'2|, |22 and |23. 4If desired, the key-way ||8 may be slidably rotated with respect to the disk |2| but in such case a suitable key receiving notch |24 should be `formed in the key-way-re- .ceiving aperture of the tumblerll 2 A key-receiving aperture |25 is formed in intermediate tumbler disk |22 and has an arcuate wall |26 spaced from the center thereof a dis'- `tance sufcient'to enable the key stem to ro- .tate therethrough without interference, and also comprises a wall |28 adapted to be abutted by the key stem in a .manner to permit said key stem to bear there-'against and to rotate the tumbler disk |22.

The bottom tumbler disk l| 23 likewise comprises ics 'an' aperture |29 of .sufficient radius to permit the key rstem to pass therethrough without -interference, and a lug |30 is formedon said -tum- `lbler |23 in -a manner to project .into said aperture |22-9 4operably to intercept the path of rotation of -said key stem l||| and to be moved thereby.

The tumbler disks -also comprise suitable c0- acting lugs |3| adapted to operate said tumblers according to the permutation system illustrated l-in Figure 1l. By the use of the key |12, however, in -conjunction with the tumbler 'disks |21, |22, and |23, the tumblers are operated' by a permutation series variant from that o'i the lugs |3| operably to bring the notches |32 of the tumblers intov registry. This variant permutation series is intended to be :known only by the proper owner of the key. Thus, should the master-key ||'2 be lost or stolen, the un-authorized holder thereof would be utterly unable to unlock the locked mechanism of my invention ywithout knowing also the proper combination withwhich itis intended to be used.

Where it is desired to use the key without the combination of a Vpermutation series adapted for its use, the tumblers should be formed with a central aperture |33 of a diameter greater than `the width .of the stem as more clearly illus- 'trated in Figure 14.

The dog |46 .has formed on its side edge a step |749 adapted 4to abut a rabbeted edge |50 of a suitable `catch |5| Vpivoted `at |52 to the bedplate 140,' vthe bolt |45 being slotted as at |53 to permit passage thereof about the dog-catch -|'5|. The upper faceof the rabbeted edge |50 is adapted to bear downwardly against the step |549 in amanner to lock .the dog |46 and .the bolt against Withdrawal. The slide bolt |45 has formed, on the upper edge of 'the slot |53 an inclined bearingr edge |54 adapted to bearagainst the `upper edge |55 of the dog-catch |5| operably to rotate said catch in a clockwise direction in amanner to bring said rabbeted edge fintoflocking engagement witlrthe step |49, when Ysaid bolt is moved downwardly into locking poisition. When the fence |48 is urged into the registered notches |56 as by an upward pull on the .shackle |4| causing said step |49 to cam in a counter-clockwise direction against the upper 'inclined rabbeted edge v|50 of the dog-catch, the dog is rocked out of engagement with the dogcatoh .|5I and is permitted to be moved upwardly operably to permit the shackle toe 4|42 to be Withdrawn from the casing 34. Downward movement of the'shackle |4| carries with itthe bolt |45 and causes the dog 4||||to bear against the'dog-catch 5| operably to rock the same out of limiting engagementl with the dog' |46 and to permit saiddog to pass said catch Yuntil the step |49 is beneath the rabbeted edge |50. Further downward motiony of the'bo'lt causes the catch to rock in areverse direction as hereinbefore described operably to lock the dog |46.

Atumbler disarranging arm |51 projects from the bolt |45 in the path of the downwardly projecting lug on the bottom tumbler operably to intercept said lug and disarrange said tumblers when the shackle |4| is withdrawn.

In Figures and 16 are illustrated means on the shackle of the lock embodying my invention operably to prevent the re-insertion of the said shackle when the toe |42 thereof is not in registry with the aperture adapted for its use in the top wall |31 .of the casing |34. The heel |43 of the shackle |4| comprises a cylindrical anchor |58 rotatably disposed in the bearing |44, said cylinder projecting upwardly a suitable distance and being of a diameter smaller than that of the rest of the shackle and moreover being tangential to the arc of the cylinder of the upper portion of the heel |43 saidupper cylinder |43 terminating in a perpendicular step |59 extending radially inwardly to the lower cylinder |66. If desired, a bearing |6| may be fixed to the bed-plate |40 and adapted to permit the sliding therethrough of the lower cylinder |60.

In operation, when the shackle |4| is withdrawn, as when the locked mechanism is in release condition the heel |43 of the shackle I4|. is rotated about the axis |62 of the cylinder |63 thereby causing cylinder |43 to move in an eccentric and to cause the step |59to bear against the upper edge |63 of thetopwall |31 of the casing |34. Thus, the shackle is prevented from being re-inserted into the casing |34 While the step |59 bears against the top wall |31, and may only be re-entered into the casing when the toe 42 is in proper position for said're-entrance. In this manner thev bolt is prevented from being locked while the shackle is still free.

I am aware that the invention may be embodied in other specic forms without departing fromthe spirit or essential attributes thereof, and I therefore desire the present embodiments to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing deseription to indicate the scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: Y

1. A lock comprising a bolt, a dog in pivoted connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release condition operably to restrain said dog and to permit rocking of said dog respectively; a lever; a dog-catch in pivoted connection with said lever and adapted when in one position to be engageable by the motion of said dog operably to lock the same, and when in another position to permit release of 'said dog; and means operable to rock said lever operably to move said dog-catch from one position thereof to the other.

2. A lock comprising a bolt, a dog in pivoted connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release condition operably to restrain said dog and to permit rocking of said dog respectively; a lever; a dog-catch in pivoted connectionv with 'said lever and adapted when in one positionto be engageable by the motion of said dog operably to lock the same, and when in another position to permit release of said dog; and means adapted to be operably engaged by a key, operable to rock said lever operably to move said dog-catch from one'position thereof to the other.

3. A lock comprising a bolt, a dog in pivoted 'connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release condition operably to restrain said dog and to permit rocking of said dog respectively; a lever; a dog-catch in pivoted connection with said lever and adapted when in one position to be engageable by the motion of said dog operably to lock the same, and when in another position to permit release of said dog; and means adapted to be operably engaged by a key and co-operable with said permutation means, operable to rock said lever operably to move said dog-catch from one position thereof to the other.

4. A lock comprising a bolt, a dog in pivotal connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release condition operably to restrain said dog and to permit rocking of said dog respectively; a lever; a dog-catch in pivotal connection with said lever and adapted when in one position to be engageable by the motion of said dog operably to lock the same, and when in another position to permit release of said dog; means loperable to rock said lever operably to move said dog-catch from one position thereof to the other; and means deriving motion from said bolt operativelyV to change said permutation means from release condition to locking condition.

5. A lock comprising a bolt, a dog in pivotal connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release condition operably to.

restrain said dog and to permit rocking of said dog respectively; a lever; a dog-catch in pivotal connection with said lever and adapted when in one position to be engageable by the motion of said dog operably to lock the same, and when in another position to permit release of said dog; means adapted to be operably engaged by a key, operable to rock said lever operably to move said dog-catch from one position thereof to the other; and means for preventing said lever from rocking when said key is not in use.

6, A lock comprising a bolt, a dog in pivotal connection with said bolt, permutation means adapted to be moved alternately into locking condition and into release 4condition operably to restrain said dog and to permit rocking of said dog respectively; means for limiting the direction of operation of at least one portion of said permutation means; a dog catch adapted when in one Y strain said dog and to permit rocking of said dogV respectively; means for limiting the direction of operation of at least one portion of said permutation means; and operable to cause deceiving noises and motions when said lock is being picked; a. dog. catch adapted vwhen in one position catch having means .operab1e.to...permit motion of s aid dog. duringfthemovement, ofsaid bolt from release into locking position, and to restrain motion of said -dogwhensaidboltvandsaid permutation meansvare inlocking position, and means on vsaid `bolt operable top-move said dog-catch into waid dog-restraining position.

YHARRY A. BARRETT.