US2293856A - Door lock - Google Patents

Description

Aug. 25, 1942- w. R. sczHlJvsrsl noon Loox Filed July 2, 1 940 5 Sheets-Sheet 1 W M M T A ug. l25, 1942. w. R. scHLAE- DOOR LOCK Filed July 2, 1940 3 Sheets-Sheet 2 1 ENToR.

M 25 @mi ATTORNEY Aug; 25, 1942. w. R. scHLAGE DOOR LOCK Filed July 2, 1940 Patented Aug. 25, 1942 DOOR. LOCK Walter R. Schlage, Burlingame, Calif., assignoi to Schlage Lock Company,

San. Francisco,

Calif., a corporation of California Application July 2, 1940, Serial No. 343,570

23 Claims.

This invention relates to door locks of the type disclosed in my former Patent No. 2,018,093, entitled Door lock, issued October 22, 1935, and especially to improvements and additions to the structure there disclosed.

'Ihe patent above referred to, briefly stated, embodies a door lock which is provided with an inner and an outer knob, a key-actuated mechanism in the outer knobwhereby the door may be opened under certain conditions from the exterior, and a manually actuated member in the inner knobl for dogging the outer knob against operation and for simultaneously displaying an indicator and obstructing the key passage, so as to prevent opening of the door from the outside except by the use of an emergency key.

The manually actuated member comprises a push button mounted in the inner knob. A bar is attached thereto, and this bar actuates the indicator, the key-obstructing means, and finally the dogging member whereby the outer knob is dogged against rotation. When the button is depressed, no one can enter from the exterior except a person possessing an emergency key; hence if it is desired to permit entrance by an ordinary key, the indicator and key-obstructing means must be released without releasing the dogging member. Such release is provided, as it is accomplished by depression of a latch bolt.

The present invention relates to the dogging mechanism, the indicator and the key-obstructing or shut-out mechanism of a lock of this character, and the object is to simplify and improve the construction and operation thereof; to provide two push buttons, one which actuates the dogging mechanism whereby the outer knob is dogged against operation, and a second button the indicator and the key shutout; to provide two push buttons which are independently operable; and further, to provide means whereby one button, or both of them, may be released in unison by mere rotation of the inner knob, and one of them by depression of the latch bolt.

The invention is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a horizontal central longitudinal section of the lock showing it mounted in a door, said view showing the two push buttons extended;

Fig. 2 is a similar section showing one of the push buttons depressed and the second push button partially depressed;

Fig. 3 is a similar section showing both push buttons fully depressed;

Fig. 4 is a central longitudinal section taken at right angles to Fig. 1;

Fig. 5 is a cross section taken on line V-V of Fig. 4; l

Fig. 6 is a perspective view of the main push button bar; l

Fig. '7 is a perspective View of the secondary push button bar;

Fig. 8 is a perspective view of a spring-retaining cage used in connection with the main push button; 1

Fig. 9 is a perspective view, partially broken away, of the main push button;

Fig. 10 is a perspective view of a pin retaining collar used in connection with both push buttons;

Fig. 11 is a perspective view of the secondary push button.

Fig. 12 is a perspective view of the main push button bar'dogging member;

Fig. 13 is a perspective view of the inner door knob spindle;

Fig. 14 is a perspective view of the dogging member whereby the outer knob spindle is dogged against rotation;

Fig. 15 is a perspective view of a spring seat used in connection with the dogging member shown in Fig, 14;

Fig. 16 is a perspective view of the retractor;

Fig. 17 is a perspective view of the housing of a pin tumbler cylinder lock;

Fig. 18 is a perspective View of the indicator and the key shutout plate;

Fig. 19 is a perspective view of a guide disc used in connection with the key shutout plate;

Fig. 20 is a perspective view oa driver blade used in connection with the pin tumbler cylinder lock; j

Fig. 21 is a perspective view of a retaining collar used in connection with the rotatable vcore of the pin tumbler cylinder lock; f

Fig. 22 is a perspective view of the outer door knob spindle; and Y Fig. 23 is a perspective view of the key-actuated spindle. Y

Referring to the drawings in detail, and particularly Figs. 1 and 5, A indicates in general a lock housing in which is mounted a retractor B,

- and C indicates a housing which carries a. latch bolt D, a retractor bar 2, to which the latch bolt is secured, and a spring 3 which surrounds the retractor bar and normally maintains the latch boltinprojected position. A f Y The lock housingindicated at A will hereinafter be referred to as the latch bolt actuating unit, and the housing C as the latch bolt unit. The housing A, as previously stated, encloses and supports the retractor B, the housing is provided with two hub portions a-a and these form a support for the pair of spindles E and F. Each spindle is provided with a knob, one knob being indicated at 4 and the other at 5. The knob 4 will hereinafter be referred to as the outer knob and the knob 5 as the inner knob. The knobs are suitably secured to their respective spindles, and when either knob is rotated the cooperating spindle will be rotated. The inner knob spindle is shown in perspective in Fig. 13, and the outer knob spindle is shown in perspective in Fig. 22.

It will be noted by referring to Figs. 13 and 22 that the inner end of each spindle is provided with a rollback member, one such member being indicated at E and the other at 6a. These rollback members engage the retractor B when the spindles are rotated, and impart an endwise movement to the retractor within the housing, and during such movement also impart endwise movement to the latch bolt D to cause retraction thereof, The retractor'B is best shown in Figs. 5 and 16. It consists of spaced side plates l, on the outer surfaces of which are formed shoulders 8 and Ba. The side plates are connected attheir inner endsv by a central crossbar 9, and the outer ends terminate in crossbars I0 which straddle and engage lugs Illa formed on the inner end of theretractor bar 2- The rollback members formed on the inner ends of the respective spindles will engage the respective shoulders 8 and 8a on opposite sides of the retractor when' the spindles are rotated, and it is through this engagement that endwise movement is imparted to the retractor and to the retractor bar 2, so as to retract the latchbolt D, projection of the latch hereinafter be referred to as the key spindle, asv

itis rotated by means of a key-actuated mechanism only. This spindle is also provided with a rollback member such as shown at 6b, and when thev spindle II is rotated by the key-actuated mechanism the rollback member 6b engages the" shoulders 8a on the retractor and thus imparts endwise movement thereto and to the retractor bar and the latch bolt D. Hence it is possible to retract the latch bolt either by the key-actuated spindle I I or by either of the knob-actuated spindles E and F. V

The door lock illustrated in the present instance is providedwith a key-actuated pin tumbler type. `of lock generally indicated at G (see Fig. 17). of the spindle F and is disposed within the knob 4 carried thereby. The inner spindle E has two push buttons mounted therein which are generally indicated at I4 and l5. These normally assume a projected position with relationto the end of the inner `spindle andk the knob carried thereby, but they may be depressed for purposes hereinafter to be described.

The key-actuated pin tumbler mechanism is of standard construction and requires no particular explanation. It should suiiice to saythat itis provided with a rotatable coregor cylinder plug I6 in which is formed a key pa'ssagefor the re- When this key is inserted, the plug I 6 may be This lock isv mounted in the outer end which is formed a central'opening 32.

mounted a crossbar I9 (see Fig. 18), which car- Akries two pins indicated at 20 and 2.

Holes are drilled through the plug member I6 (see Fig. 1) for the reception of these pins. A spring 20a,

l cooperates with the pin 29 to normally maintain the crossbar I9 in engagement with the inner end of a driver blade 22, as will hereinafter be described. The crossbar I9 functions as a key-obstructing or shutout member, as will later be more fully understood, while the pin 2| functions as an indicator.

The projecting inner end of the plug, which is slotted as'at I8, is threaded on the exterior and carries a coupling collar 23 (see Figs. 4 and 21), this coupling collar when applied being secured in any suitable manner. Between the coupling collar and the end of the plug is disposed a washer 24. This has a cross-slot formed therein, as indicated at 25, and this slot functions as a guideand support for the driver blade 22 which projectsV therethrough. The coupling member accordingly forms a coupling or connection between the rotatable coreand the driving blade 22,- and as this projects into a disc 26 secured in the outer end of the key spindle (see Fig. 23), and the disc is provided vwith a slot 2l, a coupling is formed not only between the core of the keyactuated pin tumbler housing' and the driver blade, but also a coupling is made with the key spindle. Hence when a key is inserted and the core rotated, rotational movement is transmitted to the driver'blade and by the driver blade to disc 26 and the key spindle, permitting retraction of the latch bolt, or in other words Yopening of the door from the exterior by means of a key.

The inner spindle and knob, as previously stated,`icar`ry the two push buttons indicated at I4 and I5. Their' construction and operation will now be described. First of all, itirnight be stated that the button III will hereinafter be referred to as the'main button and the button I5 as the secondary button. The main button is best shown in Fig. 9. It is pressed on or otherwise securedto a 'cage 'member shown in Fig. 8; the

v,portion onto which it is pressed is indicated at 2'I. This memberhas a disc-like base 28 with a central opening 23 formed therein, and it has two extending legs Sljfand an inner disc 3| in Also it is provided rwith Aa radially extending lug 33. This member forms a `cage and a support for the main button I4. It is slidably mounted in the outer end of the spindle E, but it is held `against rotation by the lug 33 which extends into a slot formed in the spindle (see Fig. 1). A spring 34 normally maintains the cage in a position where both buttons .are projected, the spring being interposed'between a stationary cross-plate 35, secured in the spindle, and the inner end 3I of thel lcage. The main button I4 (see Fig. 9) has an annular inwardly-extending ange 36 lformed in its outer end. This flange forms a sleeve in which theA secondary button I5 is supported and in which it is guided, a flange ia on said button limiting outward movement. The 'two buttons serve the function of imparting longitudinal movement to a pair of bars such -as shown in Figs. 6 and 7. The bar shown in Fig. 6 is the main button :bar and is indicated Vby the numeral 31, and the bar shown in Fig. 1 is the secondary button bar. The last named bar will be referred to by the numeral 38. The bar 31 is provided with a Ipair of laterally extending shoulders 39, and the bar 38 with a pair of laterally extending shoulders 39a. The bars extend through the inner spindle and the retractor, and partially into the outer spindle. The shoulders 39 and 39a engage the inner disc-shaped end 3I of the main button supporting cage, and that limits their outward movement. The ends of the bars, which extend beyond the shoulders 39 and 39a, both extend into the interior of the button I5. The extension on one bar, that is, the main bar 31, is slightly less than the extension on the bar 38; hence when both buttons are extended the secondary lbutton will engage only the end of the bar 38. The bar 31 serves the function of actuating a dogging member 4I) (see Fig. 14) which is provided with a radially extending dogging leg 4I. This dog serves the purpose of dogging the outer spindle and knob against rotation. The bar 38, on the other hand, functions.-

pressure, button I will follow with it, as the annular flange 36 on the main button engages the collar I5a on the button l 5. Hence by pushing inwardly on the main button both buttons will be depressed. As they move inwardly the cage to which the main button is secured will also move inwardly; hence the inward movement will be limited :by the lug 33 traveling in the slot in the knob spindle. During this movement the end 3| of the .cage will engage the shoulders 39 arl'd 39a of the respective bars 31 and 38, and both bars Iwill accordingly be vmoved longitudinally in the direction of arrow a (see Fig. 1).

Both bars are provided with aligning shoulders These are engaged by a dog 43, and when engaged by said dog both buttons will be secured in the depressed position. During the inward movement of the two bars into engagement with the dog 43 the initier end yof the bar 31, which has a shoulder 31a formed thereon, engages the dogging member 40 and pushes it into the inner end of the outer knob spindle. A slot is formed in this spindle, as shown at 44. The dog 4I enters the slot and it also enters a slot formed in the housing A, thereby dogging the outer spindle against rotation. The door may, however, be opened from the outside by means of the key shown at I1, as insertion of the key will permit rotation of the core within the pin tumbler cylinder lock, and this will, through the mechanism previously described, rotate the key spindle I I, which in turn will actuate the retractor and thereby retract the latch bolt and permit opening of the door.

Such opening by means of a key can, however, be prevented by depressing the second button I5. That is, both buttons, as previously described, are moved inwardly until the shoulders 42 of the respective bars 31 and 38 are engaged by the dog 43. The button I5 may then be depressed a second time, or moved a greater distance inwardly, such movement being permitted by slotting the bar at the point indicated at 45 (see Figs. 1 and 7). When the bar 38 is moved by means of the inner button its inner end, or that indicated at 38a, will engage a button 41. .This button will in turn engage the inner end oaf the driver blade= 22, and the driver blade will in turn engage the: crossbar I 9 and thereby :force the same, together with the :pins 20 and 2 I, in an outward directiom. the position of these parts when. so actuated being' shown in Fig. 3. That is, Fig. 1 shows both but'- tons in the full extended position; Fig. 2 shows the two buttons depressed, and that means that the outer spindle and knob have been dog-ged against operation; while Fig. 3 shows the button I5 further depressed, which means that the indicating pin 2I projects beyond the outer end of the [pin tumbler cylinder lock, `and it also means that the cross-plate I9 has been moved inwardly to la position where it does not permit complete insertion of a key. It is for this reason that it isreferred to as a key shutout member. In this position the outer knob and spindle are dogged against operation, the indicator is displayed, and 4no key 'can be inserted except an emergency key; that is, the .usual key will be anormal key such las shown in Fig. 4, which may be inserted to operate the .pin tumbler lock when it may be fully inserted, but when the crossbar assumes the position shown in Fig. 3 the key can not be fully inserted and thus can not actuate or release the pin tumblers to permit rotation of the core. An emergency key may, however, be provided which will release the pin tumblers and which may be inserted when the crossbar` assumes the position shownI in Fig. 3. This emergency key of lcourse will only be in the possession of a certain individual, and is provided for emergency use only. The normal key, however, is shut out at such times and can not be employed. v

Before describing the manner in which the buttons, together with the bars actuated thereby, are released and returned to normal position to.`

.permit normal operation of the lock, it is desired to describe the construction of the dog 43. This` dog is best shown in Fig. 12. It consists of a. substantially circular disc 43a, to one edge of which the dog 43 is attached. The disc has a central opening formed therein to permit the bars 31 and 38 to extend therethrough, and it has a radially projecting lug 43h which projectsv into a guide slot in the spindle, so as to permit the dog to be rotated with the spindle when the spindle is rotated. The dog 43 is disposed at an angle with relation to the disc 43a, and the disc rests on or engages the stationary cross-plate 35 secured in the spindle (see Figs. 1, 2 and 3). The disc is engaged by a spring 43c which exerts a. continuous pressure thereon. When all parts arein normal position, the dog 43 rides on the edgesof the respective bars 31 and 38, as shown in. Fig. 1, but when the bars are moved inwardly by means of the buttons the shoulders will be mov-ed. to position beyond the inner end of the dog 43,. and this will then swing inwardly and engage behind the shoulders, thus preventing return of the buttons and the bars.

To release the dog, so as to permit return of the buttons and bars to normal position, it is necessary to rotate the inner spindle E by means of the knob. During such rotation of the inner spindle, disc 43a to which the dog is secured will also be rotated, as the lug 43b extends into a slot in the spindle. During such rotation the dog will swing towards the iiat side of the bars, and thus swings out of engagement with the shoulders, and when this happens, both bars are released and are returned to normal position by their respective springs. That isl the button 41.

is-actuated by a' spring- 47a. Hence when the bar 33 is released thespring Ha will push the-'but- :ton f41 against the dogging member 4D, and it will also exert pressurel on the end of the bar 38, thereby restoring it to normalv position.

This spring alsoffunctions to move the dog 40 to released position, andas the dog'd engages the-shoulder 31a of the bar 31., this will also return to normal position. The main button will return to normal position dueto the pressure of .the spring 34, and the button l will return to .normal position due to the pressure exertedby a vspring 41a. A collar I5d, by the vvay,` is shown .in-Figs. 1 and 10; it merely serves as a closure "or cap to cover a pin |50 which extends through the slot 45 of the bar 38 and a hole-45a formed inthe bar 31, the collar being held in position by 1a.. spring l5b. This pin and cap or collar are employed for assembling purposes, that is, to retain ,the two bars in the cage of the main button during assembly of the lock parts; and the pinalso serves the function of limiting inward movement of the button I5 with relation to the button 14,

Aisr-movedan added distance inwardly, the added distance being the movement of the button l5 when assuming the position shown in Fig. 3.

.'Hence, means must be provided for dogging or;

latching the bar 38 when it assumes its inner- 4most position. This is accomplished by providing a latch, having two inwardly-extending arms 50. This latch is carried by the retractor B, and 'it is held against the edges of the bars at all times by a spring 5l. 0n the side of the bars .adjacent the latch arms 50 are formed notches,

there being two notches 52 in the bar 3l' and two .notches 53 in the bar 38. These notches are out of alignment at all times except when the bar 38 assumes its innermost position. In that position thev notches 53 align not only with the notches v52 but also with the latch arms 50, and the latch :will accordingly move inwardly into said notches and dog or latch both bars against release. 'Hence the dog 43 serves the purpose of securing b'oth bars in their rst depressed position, and the latch 50 serves the function of securing both vbars when the bar 3S assumes its innermost position. `Both bars are, however, simultaneously released when the inner knob and spindle are rotated, as such rotation will cause the rollback member. on the inner spindle to engage one of ithe side shoulders 8 and -Sa of the retractor. When this happens the retractor is moved inwardly, and when it moves inwardly latch 50 moves with it, and out of engagement with the notches 52 and 53, thus simultaneously releasing both bars, and when these bars are released the outer spindle will be undogged, the indicator will be retracted and so will the key shutout member.

Plainly speaking, by providing two buttons, one button may be employed for the purpose of dog- 1 ging the outer spindle against rotation, and the ,second button may be employed for the purpose Aof .actuating the indicatorend the key shutout mechanism. The .operation of depressing the ftwo buttons performs only one function; that is, it accomplishes dogging of the outer.. spindle.

Bothv buttons may be released from thisposition by rotating theinner spindle by means ofthe knob. On theother hand, if both buttons are depressed to the first'position, and then the second button is further depressed, the outer knob will be dogged, the indicator will be displayed, and the key shutout will assume obstructing position. In that position both buttons andtheir bars Yare retained by the latch 50, and both Vbuttons vand bars rare releasable by rotation of the inner knob and spindle. Hence it-is possible to release the main button when this functionsonly to dog the outer spindle, and it is also. possible to release both buttons when both have been depressed to their dogging positions.

The main button and bar, as previously stated, serve the function of dogging the outer spindle and knob against rotation, and when they are moved or depressed to dogging position they are held in that position by means of the Adog 43; and as this can only be released by rotation of the inner knob and spindle, it becomes possible for a person leaving a room to lock the door, as he or she in leaving-the room will only have to depress the main button and then close the Idoor upon going out. During the closing of the door the latch bolt will engage the striker plate and will be forced inwardly. Such inward movement is in no way obstructive; that is, the bar 2 having the lugs Illa formed on its inner end (see Fig. 5) can move freely inwardly without imparting movement to the retractor, but the lugs Illa will engage the arms of the latch 50 and thereby force this inwardly. This member, as previously stated, is movable independently of the retractor.

This is important, as will appear. If children are in a room, it is possible that they-might open `thedoor and depress the main button and thereafter the secondary button, and then slam it as they leave the room. If some means were not provided for releasing the secondary button from dogging position under such conditions, the door would be permanently locked and could not be opened except by means of an emergency key. This is prevented in the present instance as follows:

If the secondary button is pushed inwardly afterl the main button has been depressed, the bar connected therewith will extend the indicator, and at the. same time obstruct the key passage, thus making it impossible for anyone to enter except the person in possession of the emergencyY key. When the secondary button and bar are thus depressed, they are secured in that position by the latch 50. During slamming or closing of the door, the latch bolt will, as pre- -`viously stated, be depressed. The bar 2, connected therewith and having the lugs I0a on its inner end, will also be depressed, or in'other words, move inwardly, and when it does so, the lugs 10a, engage the arms of the latch 50, thereby pushing `it inwardly. In so doing the secondary latch bar and button are released and they will .immediately return to inoperative position and other hand, a person may lock the door by merely depressing the main button and then going out and closing the door; when a door is so locked, it can be opened by an ordinary key.

While certain features of my invention have been more or less specifically described and illustrated, I nevertheless Wish it understood that changes may be resorted to Within the scope of the appended claims.

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

1. In a door lock a latch bolt, an inner and an outer actuator for the latch bolt, a key-actuated mechanism operable from the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative, and other and independently operated means on the inner side for rendering the key mechanism inoperative except by an emergency key.

2, In a door lock a latch bolt, an inner and an outer actuator for the latch bolt, akey-actuated mechanism operable from the outer side to retractthe latch bolt, means on the inner side for rendering the outer actuator inoperative, o-ther and vindependently operated means on the inner side for rendering the key mechanism inoperative except by an emergency key, and means on the inner side for releasing the outer actuator and the mechanism which renders the key mechanism inoperative.

' 3. In aV door lock a latch bolt, an inner and an outer actuator for the latch bolt, a key-actuated mechanism operable from the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative, other and independently operated means on the inner side for rendering the key mechanism inoperative except by an emergency key, and means on the inner side for releasing, independently or in unison, the outer actuator and the mechanism which renders the key mechanism inoperative.

4. In a door lock a latch bolt, an inner and an outer actuator for the latch bolt, a key-actuated mechanism operable from the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative, other and independently operated means on the inner side for rendering the key mechanism inoperative except by an emergency key, an inner door knob, and means actuated by rotation of said knob for releasing the outer actuator and the mechanism Which renders the key mechanism inoperative.

5. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch bolt, a key-actuated mechanismin the outer knob for retracting the latch boltjmeans on the inner side of the lock for rendering the outer knob inoperative to retract the latch bolt,and other means on the inner side of the lock for rendering the key mechanism inoperative. Y

6.` In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob for retractingA the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, means on the inner Vside of the lock for rendering the outer knob inoperative to retract the latch bolt, Vother means on the inner side of the lock for rendering the key mechanism inoperative, and means -actuated by rotation of the inner knob for releasing the outer knob and the mechanism which renders the key mechanism inoperative.

' 7. In a door lock a latch bolt, an inner and an outer knob, means actuated by either-knob kfor retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for clogging the outer knob against operation, andY a second depressible button in .the inner knob for rendering the key mechanism inoperative.

8. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for dogging the outer knob against operation, a second depressible button in the inner knob Vfor rendering the key mechanism inoperative; and means actuated by rotation of the inner knob vfor releasing both buttons to permit undogging of the outer knob and for rendering the key mechanism operative.

9. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob Vfor retracting the latch bolt, av key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for dogging the outer knob against operation, a second depressible button in the inner knob for rendering the key mechanism inoperative, said buttons being depressible in unison and Whenso depressed dogging the outer knob against Voperation, said second button adapted to be further depressed and when so depressed rendering vthe key mechanism inoperative, and means actuated by rotation of the inner knob for releasing' both buttons to permit undogging of the outer knob and for rendering the key mechanism operative.

10. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for clogging the outer knob against operation, av

ently operable clogging members for securing the buttons in their respectivel depressed positions,

means actuated by rotation of the inner knob for releasing both dogs, and means for returning both buttons to normal position when released.

11.V In a door lock a latch bolt, an inner and an 'outer spindle, a retractor actuated by either spindle to retract .the latch bolt, a key-actuated mechanism in the outer spindle for retracting the retractor and latch bolt, a depressible button mounted in the inner spindle, a clogging member actuated by said button .to dog the outer spindle against operation, a second button in the inner spindle, means actuated by said button for rendering the key mechanism inoperative, means actuated by rotation of the inner spindle for releasing both buttons, and other means for returning the buttons to normal extended position.

` '12.A In a door lock a latch bolt, an inner and an outer spindle, a retractor actuated by either spindle to retract the latch bolt, a key-actuated mechanism in the outer spindle for retracting the retractor and latch bolt, a depressible button mounted in the inner spindle, a bar connected with said button and extending through the inner spindle and the retractor,` a clogging member actuated by said bar to dog the outer spindle against rotation, asecondary depressible button mountedfwithin theflrst namedbutton, av second bar connected with the secondary button and extending through the inner spindle andthe retractor, means actuated by said secondary bar for rendering the-key mechanism inoperative, said buttons adapted tobe depressed-in unison and when so depressed imparting movement to both bars-and the rst named bar causing clogging of the outer spindle, av dogging member engaging bothbars and retaining them When moved by depression of both buttons, said last named dog releasing both barswhen the inner spindle is rotated, andv springA means for returning both bars and the connected buttons to normal position..

13. In a door lock a latch bolt, an inner and an outer` spindle, a retractor actuated by either spindle to retract the latch bolt, a key-actuated mechanism in the outer spindle for retracting the retractor and latch bolt, a depressible button mounted inthe inner spindle, a bar connected with said button and extending through the inner spindle and the retractor, a clogging member actuated by saidrbar to dog the outer spindle against rotation, a secondary depressible button mounted Within .the first named button, a second bar'connected with the secondary button and extending through the inner spindle and the retractor, means actuated by said secondary bar forrendering the-key mechanism inoperative, said buttons adapted .to be depressed in unison to impart inward-movement to both bars within the inner spindle, a dogging member for retaining the bars when moved, said` second button adapted to be further depressed afterthe rst depression oi both buttons, so as to impart further movement to the second bar, means forretaining the second barand button after the second depression, manually actuated means for releasing both buttons and bars, and meansfor returning them to normal position.

14. lIna door locka-latch bolt, an inner and an outer spindle, a retractor actuated by either' spindle tov-retract the latch bolt, a key-actuated mechanism in the outer spindle for retracting the retracterand latch bolt, a depressible buttonmounted in the inner spindle, a bar connected with said button and extending through the inner spindle and thevretractor, a dogging member actuatedby said barto dog-the outer spindle against rotation, a secondary depressible button mounted-withinthe rst named button, a second -barconnected with the secondary button and extending through the inner spindle and the retractor, means vactuated bysaid secondary bar for rendering thekey mechanism inoperative, said-buttons adapted to be depressed in unison to impart inward Vmovement to both bars Withinthe inner spindle, a clogging member for retaining; thebars when moved, said second button adapted to be further depressed after the first depression-of both buttons, so asto impart further movement to the second bar, means for retaining the second bar and button after the second depression, said depression of the buttons kin unison causing dogglng of the outer spindleonly and said further depression of the secondary-` buttonrendering the key mechanism inoperative, means for releasing both buttons and bars-and` means forreturning them to normal position.

15. In a door lock a latch bolt, an inner and an-outer knob-means actuated by either knob for1 retracting the latch bolt, av key-actuated mechanism in the outer knob for retracting the latch bolt, means on the inner side of the lock for rendering the outer knob inoperativeto retract the latch bolt, other means on the inner side of the lock for rendering the key mechanism inoperative, and means actuated by` side of the lock for rendering the key mechanism. inoperative, means actuated by depression-of the latch bolt for releasing the means-Which render the key mechanism inoperative, and means actuated by rotation of the inner-knob for releasing the outer knob.

17. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in thev inner knob for clogging the outer knob against operation, a

second depressible button in the inner knob forV rendering the key mechanism inoperative, and means actuated by depression of the latch bolt for releasing the second depressible button only.

18. In a door lock a latch bolt, an inner and an outer knob, means actuated by either knob forA retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for dogging the outer knob against operation, a second depressible button in the inner knob for rendering the key mechanism inoperative, means actuated by depression of the latch bolt-for releasing the second depressible button only, and means actuated by rotation of the inner knob for releasing the Vouter knob.

19. In a door lock, a latch bolt, an inner and an outer actuator for the latch bolt, a key-actuated mechanism operable from the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative, other and independently operated means on the inner side for-rendering the key mechanism inoperative except by an emergency key, and means actuated by depression of the latch bolt for releasing said means to render the key mechanism operative.

20. In a door lock, a latch bolt, an inner and an outer actuator for the latch bolt, a keyactuated mechanism operable-from the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative, other and independently operated means on the inner side for rendering the key mechanism inoperative except by an emergency key, and means actuated by rotation of the inner actuator for releasing the outer actuator and for simultaneously rendering the key mechanism operative.

21. In a door lock, a latch bolt, an inner and an outer actuator for the latch bolt, a keyactuated mechanism operable fromA the outer side to retract the latch bolt, means on the inner side for rendering the outer actuator inoperative,

other and independently operated means on theV actuated by depression of the latch bolt for rendering the key mechanism operative but leaving the outer actuator inoperative.

22. In a door lock, a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch' bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for dogging'the outer knob against operation, a second depressible button in the inner knob for rendering the key mechanism inoperative, and means actuated by depression of the latch bolt for releasing only the button which actuates the key mechanism.

23. In a door lock, a latch bolt, an inner and an outer knob, means actuated by either knob for retracting the latch bolt, a key-actuated mechanism in the outer knob for retracting the latch bolt, a depressible button in the inner knob for dogging the outer knob against operation, a second depressible button in the inner knob for rendering the key mechanism inoperative, said buttons being depressible in unison and when so depressed clogging the outer knob against operation, said second button adapted to be furthed depressed and when so depressed rendering the key mechanism inoperative, and means actuated by depression of the latch bolt for releasing the key actuating button only to render the key mechanism operative.

WALTER R. SCHLAGE.

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