US868897A - Lock. - Google Patents

Description

PATENTED OCT 22. 1907.

H. e. VOIGHTKL 0. J. GALE'Y.

LOOK.

APPLICATION FILED r3110, 1901.

2 SHEETfi-SHEBT 2.

THE mmms PETERS cc-, WASHINGTON, o. c.

UNITED sfrnrns PATENT OFFICE.

HENRY G. VOIGHT AND CHARLES J. CALEY, OF NEW BRITAIN, CONNECTICUT, ASSIG-NORS TO RUSSELL & ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A

CORPORA'llON.

LOCK.

To all whom it may concern:

lle it known that we, Hus RY G. Vomu'r and CnAnLns .I. CALEY, citizens of the United States, residing at New Britain, county of Hartford, Slate of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a lull, clear, and exactdescription.

Our invention relates to improvements in lock and latch mechanism.

The invention is of particular utility in connection with corridor doors. say for hotel use.

The object is to provide means whereby when the occupant of a room enters and locks the door after him, he

will, by that act, prevent the unlocking of the door from the outside save by the use of aspecial key. i The owner of the room usually has a key which is termed the pass or change-key. The other key, and the only one which can be used after the door has been locked from the inside, We will term the emergency key. An emergency key, which may also be a master-key adapted to a number of different locks, is so constructed that it may be successfully employed even though the door is locked at the inside. When the door is locked from the outside any key having the proper bitting may, of course, be employed.

The main object is, therefore, to prevent intrusion upon the occupant of a room who desires seclusion and has locked his door, save in the event of an emergency. This objectwe attain by very novel and simple means, and at the same time in a most effective manner.

Another object of the invention is to provide castol'f mechanism for a dead locking device, which operates in conjunction with mechanism controlled by a suitable key inserted from the outside.

In the accompanying drawings: Figure 1 is a front elevation of a lock of the hotel type. Fig. 2 is a side elevation thereof, the upper part of one side of the case being broken away. Fig. 3 is a fragmentary view similar to Fig. 2 but showing the parts in a different position. Fig. l is a detail of one of the locking bolts. Fig. 5 is a rear on d elevation thereof. Fig. 6 is a side and front end elevation of a change-key. Fig. 7 is a side and front elevation of an emergency-key.

1 is the lock-case. 2 is the front plate thereof.

3 is the usual latch-bolt controlled in the usual mannor by the hub 4 connected with the usual knobs (not Specification of Letters Patent.

Application filed February 16, 1907. Serial No. 357,696.

Patented Oct. 22, 1907.

and so arranged relatively to the tumblers 7 that when a proper key is inserted, the said tumblers will be alined so that the bolt may be moved after the usual manner.

9 is a walking-beam connection between the bolts 543. The ends of this connection 9 take into suitable recesses in the respective bolts so that at certain times motion of one will be transmitted to the other. For example, referring to Fig. 3, the lower bolt is shown as extended, the lower end of the connection 9 bears against one end wall of the recess in said bolt-6, the other end of said connection 9 bears against the rear end wall of the recess or groove in the body of bolt 5, which stands retracted. Obviously if now the upper bolt is projected, the lower bolt will be retracted through the medium of the connection 9. The length of the groove in the upper bolt is such that after the lower bolt has been retracted, the upper bolt may be retracted without projecting the lower one, whereupon the parts will assume the position as shown in Fig. 2.

10 is a roll-back mounted on hub 10", said roll-back being actuated by the usual tl'iumb-turn, for example, at the inside of the door or lock. This roll-back engages with the usual notch in the body of the bolt 6, so that said bolt 6 may be moved to and fro at any time by the use of the th umb-turn at the inner side.

11 is a lever mounted on a fixed pivot 12. This lever stands above the arm 10 and in its path of movement. The free end of said lever is suitably connected through the medium of bar 14 with the upper tumblers 7 for bolt 5. The connection is such that whenever the tumblers 7 are lifted, the lever 11 will be lifted.

11 is a cast-off arm carried by the lever 11 or formed as a part therooffthe same cooperating with the rollback 10. When the said lever is lifted, and when the parts stand as in Fig. 3, so that its very first movement will be to unseat the roll-back arm 10 from its boltlocking position throwing it up so that when the bolt 5 is projected, the bolt 6 will then be free to move back. This backward rotation of the bolt 6 will turn the arm 10 from the position shown in Fig. 3 to'that shown in Fig. 2.

7 is the usual spring for the tumbler 7. Mounted on a part controlled by the roll-back arm 10 is a plate like member 15. In the particular form shown this member 15 has a slot 15. This plate 15 lies just back of the key-hole 8, and the slot 15" therein is shown of less width than the normal width of that part of the key hole through which the key-bit passes. In Fig. 2 it will be observed that this plate 15 is moved entirely to one side of the key-hole 8 so that any ordinary key adapted to the lock may be freely inserted. In Fig. 3 this plate is shown as moved into a position where the slot 15 stands in front of the lower part of the key-hole, whereby it follows that only such a key as corresponds 'to the shape of the slot 15, or may be passed there through, can be inserted into the lock. The slot 15 is, therefore, in a sense a movable key-hole. Its width and contour may be varied at will so long as it differs from the contour of the ordinary key used with the lock. As an example of an ordinary key we would refer to the key shown in Fig. 6, wherein it will be seen that the crosssectional outline of-the bitted portion corresponds approximately to the shape of that part of the key-hole through which it passes. As an example of an emergency key we would refer to Fig. 7, wherein the crosssectional outline of the bitted portion thereof corresponds to the shape of the movable key-hole 15. The key in Fig. 6 may represent the ordinary pass-key, whereas the key in Fig. 7 may represent the emergency key. In operation the holder of a guest-key can unlock the door of an empty room, enter, close and lock the same. The locking would be performed through the medium of the roll-back 10. This movement of the roll-back, in the particular form shown, actuates not only the bolt 6, but also moves the key-hole l5 into position directly in line with the key-hole 8. It follows, therefore, that only the holder of the emergency key, shown in Fig. 7, can enter his key in the lock. If such key is entered it may be turned so as to free the tumbler 7 and project the bolt 5, which, as before described, retracts bolt 6, whereupon by then retracting bolt 5, the door will be unlocked and the room may be freely entered. It is preferred to have the key-hole 8 on one side only of the door, although, of course, an arrangement might be made to have such key-hole on both sides with the plate 15 adapted to cover only the outer one when the door is locked.

We have shown our invention as applied to only one form of lock, but it is obvious that so far as the movable key-hole is concerned, it is adapted to other forms without further description.

. When the emergency key is used and the door unlocked, the retraction of the bolt 6 will, of course, restore the plate 1.5 to the position shown in Fig. 2.

While we have shown the plate having the movable key-hole 15 as applied to one of the bolts, this particular application is not essential in all forms of our improvement.

What we claim is:

1. In a look, a case, a key passage therein, a movable member arranged when in one position to alter the outline of the side of said kcy passage without substantially shortening said key passage.

2. In a lock, a key hole, a movable member adapted when in one position to alter the outline of both sides of the key passage without shortening said key passage.

In a lock in combination, a case having a key-hole, a movable member located inside said case and having a supplemental key-hole arranged to register with the first at certain times to alter the outline thereof, and arranged at other times out of line of said first mentioned keyhole.

-l. In a lock, a bolt, a key-hole at the outer side thereof, lock work cooperating with said bolt and controlled by a key to operate said bolt, separate means at the inner side of the lock to operate said bolt independently of the key and means cooperating therewith to alter the outline of the outer key-hole when the bolt is projected.

5. In a lock, a bolt, a key-hole at the outer side thereof, lock work cooperating with said bolt and controlled by a key to operate said bolt, separate means at the inner side of the lock to operate said bolt independently of the first named means and means cooperating therewith to alter the outline of the outer keyhole when the bolt is rejected, said means being carried by said bolt.

6. In a lock, bolt mechanism, means for operating said bolt mechanism from the outer side of the lock, separate means for operating said bolt mechanism from the inner side of the lock and including a roll-back arranged, to engage and dog said belt, a castbff for said roll-back, said cast-off being actuated by the introduction and turning of a proper key from the outer side of said lock.

HENRY G. VOIGHT. CHAS. J. CALEY.

Witnesses M. S. Wmnn, W. R. STONE.

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