US1070098A - Lock. - Google Patents

Description

A. ARENS.

LOCK.

APPLICATION FILED MAR. 2, 1912.

Patented Aug 12, 1913.

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LOOK.

APPLICATIQN FILED MAR. 2, 1912. 0 I 1,070,098, Patented Aug. 12, 1913.

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UNITED STATES PATENT OFFICE.

AUGUST ARENS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Aug. 12,1913.

To all whom it may concern:

Be it known that I, AUGUST Alums, a citizen of the United States, residing at New Britain, Hartford county, State of Connectiout, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates .to locks, and particularly to looks adapted for use on corridor doors of hotels, office buildings and the like. In its broad aspect, it contemplates the use, in connection with a latch bolt operable by a knob spindle and independently by a key or keys from the exterior, of means whereby a certain other exterior key or keys may deadlock said latch bolt against retraction from the exterior by the knob spindle and the first mentioned key or keys. It is often desirable to shut or look out access from the exterior of an apartment or office so that no person except the one possessing the certain other key or keys may enter the locked out apartment from the exterior. Such an occasion is illustrated in the case of a proprietor of a hotel or oflice building who desires to shut out a tenant who has not paid his rent or hotel bill.

The invention further contemplates the use in combination with the means just described, of a device for dead-locking the latch bolt from the inside of the apartment against entrance from the exterior through the knob spindle and through the first named key or keys hereinbefore mentioned. My lock is so devised, however, that the retraction of the latch bolt from the outside by the certain other key or keys mentioned, which for convenience I will term shutout key or keys, is not prevented by the dead-locking of the latch bolt fro-1n the inside, the shut-out key being designed to dead-lock the latch bolt or retract said deadlocking means under all circumstances.

A further object of the invention is to prevent the accidental dead-locking of the latch bolt while the door is open so that damage to the lock by closing or slamming the door with the latch bolt deadlocked, is prevented.

These and other advantages will be more fully described in the following specification and in the accompanying drawings forming part thereof and illustrating a preferred mbodiment of my invention.

In the drawings, Figure 1 is a front elevation of the assembled lock with the front cover plate with its tumbler barrel removed, and with the parts in the position they occupy when the door is closed, the dead-locking slide being shown in retracted position. Fig. 2 is a front end elevation of the lock. Fig. 3 is a fragmentary front elevation showing the dead-locking slide in bolt-locking position. Figs. 4 and 5 are respectively end elevation and top plan views of the dead-locking slide. Figs. 6, 7 and 8 are views in rear elevation of the tumbler barrel illustrating the roll-back arm thereof in various positions. Figs. 9, 10, 11 and 12 are elevations respectively of the change key, master key, grand-master key and shutout key. Fig. 13 is a fragmentary view in elevation showing the escutcheo-n plate with its tumbler barrel and indicator button. Fig. 14: is a fragmentary sectional view illustrating one form of connection between the thumb turn and indicator button.

Referring to the drawings by numerals, 1 indicates the lock case, 2 the face plate thereof and 3 the main latch bolt. of usual construction.

4 indicates the hub of the knob spindle (not shown), which hub carries roll-back arms 5 as usual adapted to be actuated by the turning of the knob. These roll-back arms bear against a spring pressed yoke 6 adapted when moved by said arms to engage an abutment 7 formed on the end of the latch bolt 3, and retract said latch bolt.

8 indicates the usual night latch pins connected by the walking beam 9 and actuating the latch 10 to dog the roll-back of the outer knob spindle in the usual manner.

In order to dead-lock the latch bolt 3 against retraction, I have provided what I term a dead-locking slide in the form of sliding platell, the movement of which in either direction is limited by stop lugs 12 in the look case 1. This locking slide 11 is suitably guided in the lock case and at its lower end is provided with .a dead-locking shoulder 13 which, when the slide is moved downwardly from the position shown in Fig. 1 to that shown in Fig. 3, is moved in the rear of the latch bolt 3 and forms an abutment engaging its rear end, thus preventing its retraction. Adjacent the edge of the case and intermediate its ends, the slide 11 is formed with a recess 14; inclosing a pin or stud 15 upon which is mounted an anti-friction roller 16. Upon the face of the slide 11. adjacent this pin is mounted a pivoted pawl 17 engaged by a spring 18 and normally pressed against the friction roller 16 thereby. The inner edge of the pawl which bears against this friction roller is formed with a bevel 19, its opposite outer edge being provided with a projecting portion forming in effect a cam face 20. As a means for retaining this slide in b0ltlocking and unlocking positions, its outer edge is formed intermediate its ends with a toothed detent 21 on either side of which the lower edge of the slide is cut away to form ledges 22 overlying and retaining in a suitable seat formed in the lock case a leaf s iiring 23. This spring is provided with an inwardly projecting V-shaped teeth 23 adapted to engage with the toothed detent 21. This detent, when the slide is actuated to either position, is adapted to snap over this projection and rest on one side or the other thereof, this position marking the limit of movement in either direction and the slide being held in such position by the pressure of the springtooth 23 against a face of the detent 21. To provide for the actuation of this locking slide 11 into boltlocking and unlocking position from the interior of the door, I employ a thumb turn (not shown) whose spindle 2 1: carries a hub 25 provided at its end with a roll-back arm 26 operating within a recess 27 formed in the inner edge of the slide 11 adjacent its upper end, and adapted to bear against the adjacent face of the slide to move it downwardly and upwardly into bolt-locking and unlocking position. The hub 25 also carries at its end, opposite the roll-back arm 26, a locking flange 28 whose purpose will be hereinafter explained. Beneath the flange 28 the hub is formed with flat surfaces 20 All against which bears a leaf spring 30 suitably retained in the case and designed to hold the hub in either of its turned positions. In order to indicate to a person on the exterior of the door that the latch bolt has been dead-locked from the inside, I prefer to connect the forward end of the hub 25 with an indicator button 31 mounted on the escutchcon plate of the lock case. I have not illustrated any specific construction of indicator button and connections therewith as the type is well known in the art.

In order to prevent the accidental deadlocking of the main latch bolt through the thumb turn while the door is open, I provide an auxiliary latch bolt 32 slotted to slide in the lock case. A spring 33 is suitably held in the lock case and has its upper ends bearing against the opposite ends of this auxiliary latch bolt 32 as illustrated, and normally tends to project the end of the bolt. lV hen the door is closed, however, the end of the bolt hits against the blank face of the striking plate secured to the jainb of the door and is held retracted against the tension of this spring. As this feature is old and well known in the art, I have not deemed it necessary to illustrate it. At its upper end, the latch bolt 32 is provided with a stud 84 and a slot 35. A post 36 is mounted in the lock case 1 to lie within the slot 35 and extends above the face of the bolt 32, serving as a hub for a dogging rock arm 87 one end of which is slotted at 38 to engage the stud 3 1 of the bolt, and the other end of which extends out ardly and is formed at its end with a dogging flange which, when the bolt is retracted, is drawn downwardly but which, when the door is open and the bolt is projected by its spring, is rocked upwardly, as shown in dotted lines in 1 f the drawings, to bring its dogging flange 39 against and in the path of upward movement of the flange 28 of the thumb turn hub 25, thereby preventing the hub from being rocked to move this flange upwardly and the roll-back 26 downwardly to move the locking slide 11 into bolt-locking position.

I have heretofore stated that when the latch bolt is dead-locked by the slide 11, it cannot be operated from the exterior either by the knob spindle or by a certain exterior key or keys named, but that it can be operated from the exterior by a certain other key or keys which I have termed shut-out keys, this last named form of key being designed to operate from the exterior even when the locking-bolt has been irojeeted from the interior, the parts being so constructed and arranged that when the door is locked from the exterior by said key, it can only be unlocked from the outside by means of said key. To this end I have provided means independent of the inside thumb turn and operable from the exterior only by a shut-out key or keys. This result is ac complished as follows: The tumbler barrel alt), which is secured to the outer face plate of the lock case, carries two c nicentric rotating tumbler barrels or sleeves. The inner of these barrels is operable by a series of keys, such as what I term. a change key, a master key and a grand-imister key, the bitting of these keys being arranged to retract a series of spring-pressed pin tumblers to permit the barrel to turn in a manner well known in the art. This inner sleeve carries at its end within the lock case a. roll-back arm 41-1 provided with abutment flanges 41 which engage with a pin or stud 42 carried l'iy the end of the outer tumbler barrel 41-3 and limiting the movement of the roll-back arm to half a revolution in one direction. This movement is in a clock-wise movement from the position shown in Fig. (5 to that shown in Fig. 7 of the drawings and can be imparted to the rollback arm by any of the plurality of keys mentionedthat is, the change key, master key and grand-master key, for example. This movement will bring the end of the roll-back arm in the course of its downward movement against the upper face of an abutment plate 44 carried by the end of the main latch bolt 3 and will retract said latch bolt when the dead-locking slide has not been projected in the rear thereof. If the dead-locking slide, however, has been projected, these keys cannot retract the main latch bolt. The shut-out key, however, cooperates with the tumbler barrel and with the pawl 17 carried by the locking slide to retract this slide if projected and retract the bolt, and to project the slide into locking position to lock the apartment against intrusion from the exterior through the actuation of the knob spindle and the operation of the series of keys hereinbefore mentioned. This is accomplished in the following manner: The shut-out key is so bitted that it cooperates with the spring pressed pin tum blers to free both the inner and outer tumbler barrels and permit them both to be freely rotated by the key, the stud 4:2 moving with the roll-back arm a1 and with the end of the outer tumbler barrel 43. The rollback arm, therefore, can make a full revolution and is so located with reference to the pivoted pawl 17 that when rotated in a counterclockwise direction, as indicated in dotted lines in Fig. 8, its edge will engage the lower portion of the cam face 20 and, when the slide 11 is in projected bolt-locking position, will force said pawl inwardly against the anti-friction roller 16, and by reason of its beveled edge 19 contacting therewith, move the pawl and the slide 11 upwardly into retracted unlocking positlon, whereupon the key may be rotated to turn the roll-back arm 4L1 in the opposite direction to bring its end against the abutment plate 441 and retract the main latch bolt.

hen it is desired to dead-lock the main latch bolt from the outside, the shut-out key is inserted and the roll-back arm 41 and outer tumbler barrel 43 rotated in a counterclockwise direction, as hereinbefore described. The pawl 17 has been raised with the slide sufliciently to be cleared by the end of the roll-back arm 41 as it is rotated, and the turning movement of this arm is continued past this point until its end contacts with a strike lug 11 formed on the slide 11. A continued movement of the roll-back arm will force this lug and its slide downwardly into locking position, and the roll-back arm may then be turned back to its initial position, the arm striking the under face of the pawl 17 during such movement and merely turning it on its pivot without actuating the slide. This locking and unlocking operation of the dead-locking slide through the shut-out key and the roll-back arm 41, is

independent of the thumb turn hub 25 which is turned by the movement of the slide into the positions it would assume were it actuated from the interior to accomplish the same result. It will be noted also that even when the shut-out key is used to bring its roll-back arm 41 against the pivoted pawl 17, the dead-locking slide 11 cannot be projected into bolt-locking position when the door is open, as the auxiliary latch will be projected by the opening ofthe door, rocking the abutment flange into dogging position relative to the flange 28 of the hub 25 and preventing the movement of the slide 11 and roll-back arm 26 of said hub.

From the foregoing it will be evident that my shut-out key not only operates as a means of shutting out or excluding entrance to the interior of the apartment except through said key, but also operates as an emergency key which can retract the dead-locking slide 11 when locked from the inside and permit access to the apartment in emergency.

While I have described a specific embodiment of my invention, I desire it to be understood that various changes and modifications of the structure thereof are still possible within the spirit of the invention and within the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key, means operable by a second key whereby said latch bolt may be dead-locked against retraction by said knob spindle and said first named key, and whereby said deadlocking means may be rendered inoperative and said latch bolt retracted.

2. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted through a key or keys, a movable member adapted to dead-lock said latchvbolt against retraction by said knob spindle and said first named key or keys, and means operable by another key for moving said member into latch bolt locking and unlocking position whereby said bolt may be dead-locked by said other key against retraction through said knob spindle and said first named key or keys, and whereby said bolt may be retracted by said other key.

3. In a lock in combination, a latch bolt, means whereby said boltmay be retracted through a knob spindle, a roll-back arm,

tumbler mechanism cooperating therewith, an exterior key cooperating with said tumbler mechanism and said roll-back arm to retract said latch bolt independently of said knob spindle, a movable member adapted to be actuated to dead-lock said latch bolt against retraction through said knob spindle and said first named exterior key, abutments carried by said movable locking member, and means whereby another exterior key may cooperate with said tumbler mechanism and rollback arm to actuate said arm into cooperative engagement with said. abutments to thereby project said movable member to dead-lock said latch bolt and to retract said member from said position and retract said latch bolt.

4. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, a tumbler barrel, tumbler mechanism cooperating therewith, a roll-back arm operated through said tumbler barrel, means whereby an exterior key may cooperate with said tumbler mechanism and said tumbler barrel to impart a partial revolution to said roll-back arm to thereby retractsaid latch bolt independently of said knob spindle, a movable member adapted to be actuated to dead-lock said latch bolt against retraction through said knob spindle and said exterior key, abutments carried by said movable member located out of the path of partial. revolution of said roll-back arm, another exterior key cooperating with said tumbler mechanism and said tumbler barrel, and means whereby said other exterior key may impart a less restricted rotation to said roll-back arm to thereby cooperate with said abutments to project and retract said movable member into dead-locking and unlock ing position and retract said latch bolt.

5. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, a plurality of tum bler barrels, tumbler mechanisms cooperating therewith, a roll-ba k arm operated through one of said tumbler barrels, means whereby an exterior key or keys may cooperate with said tumbler mechanisms and said tumbler barrel to impart a partial revolution to said roll-back arm to thereby retract said latch bolt independently of said knob spindle, a locking slide adapted to be actuated to dead-lock said latch bolt against retraction through said knob spindle and said exterior key or keys, a pivoted abutment member carried by said sliding member, a second almtu'ient member carried thereby, both of said abutment members being located out oi the path of partial revolution of said roll-back arm, another exterior key cooperating with said tumbler mechanisms and said pluralit I it tumbler barrels, and means whereby other key may impart a less restricted rotation to said rollback arm to thereby cooperate with one of said abutment members to project said sliding member into dead-locking position and cooperate with the other abutment member to retract said sliding member from dead-locking position and retract said latch bolt.

6. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently actuated from the exterior through a key, means operable from the interior whereby said latch bolt may be dead-locked against retraction through said knob spindle and said exterior key, and means operable through an other exterior key whereby said dead-locking means may be operatively and inoperatively positioned independently of said interior operating means, and whereby said means may be actuated to dead-lock said bolt against said knob spindle and first named exterior key, and may be retracted from dead-locking position when so actuate-d from the interior.

7. In a lock in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, a rotatable actuating member adapted to cooperate with said latch bolt, tumbler mechanism cooperating with said actuating member, means whereby an exterior key may cooperate with said tumbler mechanism and actuating member to partially rotate said member to retract said latch bolt independently of said knob spindle, a movable member adapted 'to be actuated to dead-lock said latch bolt against retraction through said knob spindle and said exterior key, means operable only from the interior for actuating said member, abutments carried by said member located out of the line of partial rotation of said rotatable actuating member, another exterior key cooperating with said tumbler mecha nism and said rotatable actuating member, and means whereby said other key may impart a less restricted rotation to said actuating member and thereby engage an abutment and retract said movable member from dead-locking position independently of said interior actuating means and retract said latch bolt, and whereby said rotatable actuating member may engage an abutment to actuate said movable locking member and dead-lock said latch bolt against retraction through said knob spindle and said first named exterior key.

8. In a lock in combination, a main latch bolt, means whereby said main latch bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted by a key, a movable member adapted to lock said main latch bolt against retraction by said knob spindle and. said key, means whereby said member may be actuated from either side of said door to operative and inoperative position, a normally projected auxiliary latch bolt retracted when said door is closed, and means actuated by said auxiliary latch bolt when the door is opened and said bolt projected whereby said movable member is held against bolt locking movement.

9. In a lock in combination, a main latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently retracted by an exterior key, a dead locking slide adapted to be moved to lock said main latch bolt' against retraction by said knob spindle and said exterior key, means operable from the interior of the door for operatively and inoperatively positioning said slide, means whereby another exterior key auxiliary latch bolt retracted when said door may independently so position said slide, an is closed and projected when said door is opened, and means operated by the projection thereof when the door is opened preventing the operation of said slide to deadlock said main latch bolt.

10. In a lock, in combination, a latch bolt, means whereby said bolt may be retracted through a knob spindle, means whereby said bolt may be independently actuated from the exterior through a key, means operable from the interior whereby said latch bolt may be dead-locked against retraction through said knob spindle and said exterior key, indicating means on the exterior operatively positioned by dead-locking movement of said interior operating means and means operable through another exterior key whereby said dead-locking means may be operatively and inoperatively positioned independently of said interior operating means and whereby said means may be actuated to dead-lock said bolt against said knob spindle and first named exterior key, and may be retracted from dead-locking position when so actuated from the interior.

AUGUST ARENS.

Witnesses:

C. A. SEELYE, C. A. PARKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. C.

It is hereby certified that in Letters Patent No. 1,070,098, granted August 12, 1913, upon the application of August Arens, of New Britain, Connecticut, for an improvement in Locks, an error appears in the printed specification requiring correction as follows: Page 5, transpose lines 16 and 17; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 23d day of September, A. D., 1913.

[SEAL] R. T. FRAZIER,

Acting Commissioner of Patents.

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