US2370690A - Door lock - Google Patents

Description

March 6, 1945.

W. R. SCH LAGE DOOR LOCK Filed April 2, 1941 2 Sheets-Sheet l IN VEN TOK.

March 6, 1945. l W R, SCHLAGE 2,370,690

DOOR LOCK Filed April 2, 1941 2 Sheets-Sheet 2 ATToRN Patented Mar. 6, 1945 UNITED fsTATEs, PATENT OFFICE 'l DOOR LOCK Walter B.. Schlage, Burlingame, Calif.,`assgnor to Schlage Lock Company, San Francisco, Calif., a corporation of California Application prl 2, 1941, Serial No. 38.6.47!)

17 claims. (c1. 'zo-'143) This invention relates to a door lock, and especially to a double throw latch bolt therefor.v f The object of the present invention is generally to improve and simplify the construction and.

operation of locks of the character described; to provide a door -lock having a. latch bolt which is adapted to assume two positions, rst a normal half-projected position, and second a fully projected position; to provide means for rsimultaneously dogging an outer knob of the lock against 1.0

rotation or operation when the latch bolt assumes its fully projected position; to Yprovide pushbutton actuated means operable through an inner knob for controlling the position of the latch bolt; to provide key actuated means'in an outer knob for controlling the position oi the latch bolt; whereby rotation ofthe inner knob or depression of the latch bolt when it assumes a full projected position 4will restore it to the normal projected position, and at the same time undog the outer L button to normal on line I-I of Fig. 2;

Fig. 2 is a vertical longitudinal section taken on line II-II ofl Fig. 1;

. Fig. 3 is a section similar to Fig. l, showing 'the latch bolt in Vits extended position andthe outer spindle dogged against rotation;

Fig. 4 is a perspectiveview of the secondary retractor plate;

Fig. 5 is a perspective View of a main retractor plate and a latch bolt secured thereto;

Fig. 6 is a perspective view of the key actuated tumbler cylinder; Y

Fig. 7 isa perspective View of vthe pushbutton and the bar actuated` thereby;

igS is a perspective view of the inner spindle; an v Fig. 9 is a perspective view of the outer spindle.

Referring to the drawings in detaiLand parand further, to provide means portion22 and an enlarged portion 22a.

Y the cross-slot are notchedas shown at 26 to form ticularly Figs. 1 to 3, A indicates a portion of a door to which is suitably secured a lock housing consisting of two side plates 2 and 3 which are joined at their outer ends by a face plate 4. Secured between the plates `2 and 3 of the lock housing is a U-shaped frame consisting of upper and lower horizontally extendingr arms 5 and 6, connected at their rear ends by an end member 1, and provided at their forward ends with rightangular lugs 8 which are secured to the face plate be referred to as the outer knob, and the inner 4 by rivets, counters'unk screws or the like, indicated at 9. f

The latch bolt of the lockis indicated at l. It extends through anopeningy QII formed in the 'face plate, and is guided thereby.` The latch bolt is secured to a retractor plate generally indicated at B. This plata/together with the latch bolt, is best shown in Fi'g. 5. "I'he plate is rectangular in shape and has an elongated opening formed therein, asshown. at I2, through which the inner and outer spindle, hereinafter to be referred to, extend. It is provided with two guide lugs I 3`l 3 which extendinto slots lll- I 1i formed in the arms 5 and 6. ofthe iframe,` and it 'is provided at its rear endwith ay head `member l5l on which is formed a dog I6. Said head is also provided with a notch I5a to straddle abar 32 here-v inafter to be described, and with a pair of shoulders |517. y

An auxiliary plate is also employed. This is generally indicated at C. llt is rectangular in shape and has an :elongated opening formed therein suchl as shown at I2a. Its rear end is provided with a head I5c which is clearly shown in Fig. 4.` The plate C .also has a straddling notch formed therein, as shown at I8, and'on opposite sides thereof are shoulders I9-l9 which engage the rollback members of the respective spindles,

. as will hereinafter be described. l

AFormed on the side plates 2 and 3 of themain lockv housing are outwardly projecting annular flanges or hubs 2U, 2l. These hubs form bear- -ings for a pair of tubular spindles generally indicated at 22 and23; the spindle 22 willhereinafter be referred to as the outer spindle and the spindle 23'as the inner spindle. The outer spindle is best shown inrFig. 9. .It has a reduced This enlarged portion is cross-slotted as at 24 to form a rollback member 25, and the opposite sides of openings into which the dog I6 may enter to dog the outer spindle against rotation, as will hereinafter be described.

.The inner spindle is best shown in Fig. 8. It is vo1? uniform diameter throughout its length, and the diameter is such that it will telescope and snugly iit theini/erior of the enlarged portion 22a of the outer spindle. The inner spindle is also cross-slotted, as shown at 21, and therebyforms -a rollback membenindicated at 28. The. inner spindle 23 is journaled in the bearing `2l vrand the spindle 22 in the bearing 20. -The spindle 22has a knob 3llr secured thereto, which will hereinafter spindle 23 has a knob 3l secured thereto which will be referred to as the inner knob.

Extending through the inner knob and the spindle 23 is a bar 32 (see Figs. 1, 3 and 7). This bar is circular in cross section and snugly ts the interior of the inner spindle. Its outer end is provided with a pushbutton 34 and a collar 35. This collar engages the outer end of the inner spindle, and an annular shoulder 35 on the inner knob overlies it, so that outward movement of the rod 32 and the pushbutton 34 will be limited. The push button and bar may, however, be moved inwardly with relation to the knob 3| and the inner spindle, as the inner spindle terminates at the point 23a. On the inner end of the bar 32 are formed two cross-slots, indicated at 35 and 35a. These slots point in opposite directions, and their function will hereinafter be described. Also formed on the inner end of 'the bar is a lug 3l; this is straddled or engaged by a pair of lugs 38 (see Figs. 1, 3 and 6) which are formed on the inner end of a key-actuated tumbler cylinder 40. This cylinder is mounted in the outer end of the outer spindle 22, and is secured against endwise removal therefrom by a collar 4| overlaid by an annular shoulder 42 formed-on the knob. The outer spindle functions as a housing for the cylinder. The tumblers 43 carried by the cylinder project into a slot formed in that housing, but when a key is inserted they are retracted and the cylinder can be rotated. Such rotation is transmitted through the lugs 38 to the lug 31, and this in turn rotates the bar 32; hence the bar is not only rotatable within the inner spindle but it is also longitudinally movable therein when pressure is exerted on the .projecting pushbutton 34. Thebar and pushbutton will, however, normally assume the extended position shown in Fig. 1, as a spring 45 is interposed between the key-actuated tumbler cylinder and the inner end of the bar 32.

The purpose of the present invention is to provide a door lock having a latch bolt, such as shown at I3, which may assume two positions, that is, a double-throw latch bolt, the iirst or normal position assumed by the latch being a partially projected position such as shown in Fig. 1, and the second being an extended or fully projected position such as shown in Fig. 3. Another purpose ofthe invention is to provide means for automatically dogging the outer spindle and knob against rotation when the latch bolt assumes its fully projected position; another purpose is to permit retraction of the latch bolt from said last named position either by rotation v of the inner knob and spindle or by key actuation through the outer knob and spindle, and a rightor left-hand installations, but it does not matter whether the dogging lug enters one notch or the other, as the spindle and outer knob will be dogged against rotation. Thus, if it is desired to open the door when the mechanism assumes the position shown in Fig. 1, it can be accomplished by rotation of either knob. For instance, if the inner knob is rotated the Iinner spindle 23 will also rota-te, as the knob is secured thereto. The rollback member 28 formed on the inner spindle will in that instance engage one or another o the shoulders I9 formed on the auxiliary plate, andforce this in a rearward direction against the action of a centrally positioned spring 46. Asit moves rearwardly due to the action of the rollback member 28, the shoulders will iinally align with the shoulders |51) of the head of the main retractor plate B, and the rollback member will then'engage these shoulders, and the main retractor plate will also move rearwardly and the latch bolt Hl will thus be retracted. When the knob is released, both of the plates and the latch bolt will return to normal projected position, as the auxiliary plate will be returnedl to normal position by the spring 4E, and the main plate will be returned by the springs indicated at 4l. The same action will take place if the outer knob is rotated, as the rollback member 25 formed.

thereon will in that instance engage the shoulders I9 of the auxiliary plateand move it rearwardly until it aligns with the shoulders 15b of the main latch plate, and then the main latch plate will also move rearwardly, thus -causing retraction of the latch HJ'.

If a person is in the room and desires to lock the door, against intruders, Ior against all persons except those in possession of the proper key, it is only necessary for that person to push on the button 34. When he or she does so, the rod 32 will move inwardly against the tension of the spring 45, and the notch 35 will assume a position in which it aligns with the head i5 of the further purpose is to undog the outer spindle and knob and to return the latch bolt to a partially projected position by depressing the latch bolt when it assumes its fully projected position. The manner in which this is accomplished is as follows.

The position of the mechanism shown in Fig. l is its normal position; that is, the latch bolt assuines its first or partially projected position. In this position the latch bolt may be retracted by rotation of eitherkno'b, as the clogging member i6 carried by the inner end ofthe main retractor plate B is held out of Vengagement with, the

notches 26 Yformed in the enlarged end of the outer spindle. Two notches are shown, but only one dogging lug is shown; obviously only one notch would be required, but two are shown in Fig. 9, so as vto permitthe look to t either main plate, and the moment this occurs the head will drop into the notch 35 and assume the position shown in Fig. 3. i The main latch plate and the latch bolt are in this manner fully projected, or in other Words extended to the second position, and it should also be noted that the outer spindle and knob becomes dogged against'rotation, as the clogging lug I6 will dro-p into one or another of the notches 26 formed in the outer spindle.

Thus by merely rdepressing the pushbutton, two things are accomplished: the latch bolt is.ex

tended to its second or fully projected position,

and the outer spindle and knob are simultaneously dogged against operation; thus no one can enter except a person having the proper key. Such person may, however, enter by inserting the key and rotating the cylinder 4U. Such rotation will rotate the bar 32 and the rear portion of the bar or that opposite the notch 35 will thus force the head member I5 rearwardly to the position shown in Fig. 1, and when this happens the bar 32 becomes released, and the spring 45 will immediately project it to assume the extended position shown in Fig. 1. If a. person inside the room, after having locked the door, that is, having depressed the pushbutton and caused full extension of the latch bolt and dogging of the outer spindle and knob, desires to leave the room, he or she will only have to rotate the inner knob and spindle. In `doing so the rollback member 2,8 will immediately engage the plates B and'C and force them rearwardly. When this happens the as'zaoooA latch bolt I 0.is retracted, and the rod 32 with the button 34 formed at its outer end, is released and will again become automatically extended. f

There is still one other method of releasing the doggingmember, and that is by depressing the latch bolt from the exterior. For instance, a person not familiar with the lock might depress the button before leaving the room and then go out and close the door. In this case the fully extended latch bolt I would engage the striker plate and would become depressed. Obviously, if it Lbe-v if he did so, he would not be able to re-enter. Thev only manner in which the door can be locked from the outside is for the person leaving the room to insert a key in the outer knob after closing the door, and then rotate the key cylinder, whereupon the notch A35a will assume a reverse position from that shown in Fig. l. -In other words, it would then register with the head member I5, and this would automatically enter` and cause full projection of the latch bolt ID, and at the same time dog the spindle. On the other hand, if the same person wants to re-enter. he or she would re-insert the key and reverse the rotation of the bar 32 and return the notch 35a to the position shown in Fig. 1. The head I would then be expelled, and the outer spindle and knob would be undogged and would thus -be free to be rotated to retract the latch bolt.

Earlier in the specification it was. stated that both the main retractor plate B and the auxiliary plate C had an elongated opening I2 andy I2a formed therein.. These openings are provided merely to permit the spindles to pass through the plates, and to permit the plates to move longitudinally during retraction. The auxiliary plate C performs only one function. and if it were not for that function it could be entirely eliminated. That function is to hold the knobs against-free rotation. That is, the normal position assumed by the main retractor plate is that shown in Fig. 2; in this position it will be noted that the shoulders |512 are spaced fromand disposed rearwardly of the rollback members 25 and 28. and as such do not engage them. The rollback members and both spindles and'knobsv would thus be free to rotate until they engage a shoulder I5b, and such free rotation would not bedesirable. It is for this reason that the auxiliary plate is employed. It has a pair of shoulders I9 on opposite sides of the notch I8; they engage the forward edges of the rollback members 25 and 28. and they are held in such engagement by the spring 46. Thus the respective spindles and knobs are held against free rotation, but they are nevertheless rotatable in the usual manner, that is, by grasping-the knobs-and rotating them against the pressure of the spring 4B, and finally Aagainst the pressureof the springs 41. v I

l While this and other features of my invention have been more or less speci-cally described, I wish it understood that changes maybe'resorted to within the scope of the appended claims, and that the materials and finish of the various parts employed may be such as the experience of-,the manufacturer and varying conditions of use may demand. u

Having thus described and illustrated my inand desireto secure by vention, what I claim Letters Patent is 1. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said vbolt to s aid positions, an inner and an outer independently operative spindle, arotatable member within the spindles, and means on `said member controlling either partial or full projection of the latch bolt.

2. In a lock, a latch bolt adapted to assume a `partially or a fully projected position, means operative .to project said bolt to said positions, an

. inner and an outer independently operative spindle, a rotatable member within the spindles, and means on said member controlling either partial or full projection of the latch bolt, and key actuated .means for imparting rotational movement to the rotatable member.

3. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said bolt to said positions, an

innerand an outer independently operative spindle, a longitudinally movable member within the spindles, and means on the longitudinally movable member controlling either partial or full projection of the latch bolt.

4In a lock, a'latchbolt adapted to assume a partially or a fully projected position, means operative to project said bolt to said positions, an inner and an outer Vindependently operative spindle, a longitudinally movable member within the spindles, means on the longitudinally movable movement to said member, and means on said member controlling either partial vor full projection ofthe latch bolt, said means being actuated either by longitudinal or rotational movement. v

6. In a lock, a latch bolt adapted to'assume a partially or .a fully projected position, means operative to project said bolt to said positions, an inner and an outer indep-endently operative spindle, a member within the spindles, said member being both rotatable and longitudinally movable, means on said member controlling either partial or full projection of the latchbolt, said means being actuated both by rotating and longitudinal movement, key actuated means for imparting rotation to the member, and a push button for imparting longitudinal movement tothe member.

7. In a lock, a latch bolt adapted to assumey a partially or a fully, projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindleja, rotatable member within the spindles, means on said member controlling either partial or full projection of the latch bolt, and means actuated by full projection of thevlatch bolt-for dogging the outer spindle against operation.

8. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindle, a longitudinally movablemember within the spindles, means on the longitudinallymovable inenibe'r! controlling ether-v partial or full projection of the latch bolt, a push button projecting from'one end of one of the spindles for imparting longitudinal movement to the longitudinally movable mem-ber, means actuated by full projection ofthe latch bolt for clogging the outer spindle against operation, and key actuated means for rotating `the rotatable member to undog the outer spindle to permit operation of said spindle.

9. In a lock,'a latch bolt adapted to assume a partially or a lfully projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindle, a longitudinally movable member within the spindles, means on Athe longitudinally movable member controlling either partial or ful1 projection of the latch bolt, a push button projecting from one end of one of the spindles for impartingv longitudinal movement to the longitudinally movable member, means actuated by full projection of the latch bolt for clogging the outer spinhdle against operation, and means actuated by depression of the latch bolt when fully extended for undogging the outer spindle to permit operation of said spindle.

10. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindle, a rotatable member within the spindles,

means on said member controlling either partial'.

o r full projection of the latch bolt, means actuated by full projection of the latch bolt for dogging the outer spindle against operation, and means actuated by rotation of the inner-spindle for undogging the outer spindle to permit operation thereof. l1. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to projectsaid bolt to said positions, an inner and an outer independently operative spindle, a rotatable member Within the spindles,

agavdoeo tending the vlatch bolt to full projected Position,- and means actuated b5/'rotation' of the memberl for undogging the outer spindle to permit operationvof said spindle. f

` 13. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindle, a dog for dogging the outer 'Spindle against operation, and means within the spindles and operative independently thereof `for retract# ing the latch bolt from full to partial projected position and for simultaneously actuating said dog and undogging the outer spindle.

14. In a lock, a latch bolt adapted to assume a partially ora fully projected position, means operative to project said bolt to said positions, an inner and an cuter independently operative spindle, `a dog for dogging the outer spindle against operation, and means Within the'spindles controlling movement of the latch bolt from par.- tial to full projection and yfor simultaneously actuating said dog and do-gging the outer spindle. l5. In a lock, a latch bolt adapted to assume a partially or a fully projected position, means operative to project said Abolt to said positions, an inner and an outer independently operative spindle, a =dog for clogging the outer spindle against operation, means Within the spindles controlling movement of the latch bolt from partial to full projection and for simultaneously actuating said dog and dogging the outer spindle, and a A key operated mechanism for actuating the means within the spindles.

16. In a lock, a latch bolt adapted to assume a. partially or a `fully projected position, means operative to yproject said bolt to said positions, an inner and an outer tubular spindle, a rollback member on the inner spindle adapted to retract the latch bolt Afrcum either position, a rollback member on the outer spindle adapted to-retract thelatchbolt from the partially projected posi-- means on said member controlling either partial or full projection of the latch bolt, means actuated by full projection of the latch bolt for dogging the outer spindle against operation, key actuated means for rotating the rotatable member, said member when rotated in o ne'direction undogging the outer spindle and simultaneously retracting the latch bolt from full to partial projected position, and means actuated by rotation of the rotatable member in the opposite direction for projecting the latch bolt from partial to lfull projection and simultaneously 'causing doggingfof the outer spindle.

' 12. In a lock, a latch bolt adapted to assume a partially ora fully projected position, means operative to project said bolt to said positions, an inner and an outer independently operative spindle, a member within the spindles, said member being both rotatable and longitudinally movable, means on said member controlling either partial or full projection of the latch bolt, said means being actuated lboth by rotating and lon-- gitudinal movement, means actuated by full projection of the latch bolt for dogging the outer spindle against operation, means actuated by longitudinal movement of the member for extion only, a dog connected with and movable in unison .with the latch bolt, said dog (logging the outer spindle against operation When. the latch bolt is fully projected and thereby preventV ingretraction of the latch bolt by the .outer spindle, a. key actuated member Within the tubuflar spindles, and means on said member controlling full or partial .projection of the latch bolt.

1.7. In a lock, a latch bolt adaptedto assume a partially or a fully projected position, means operative to project said bolt to said Positions, an inner and an outer tubular spindle, a rollback member on the inner spindle adapted to retract the latch bolt from either position, a rollback member on the outer spindle adapted to retract the latch bolt from the partially projected position only, a dog connected with and movable in unison With the latch bolt, said dog -dogging the outer spindle against operation when the latch bolt is fully projected and thereby preventing retraction of the latch bolt by thev outerlspindle, amanually actuatedl member Within the tubularspindles, and means on said member controlling full orpartial projection ofthe latch bolt.

WALTER R. someten,

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