US1141150A - Lock. - Google Patents

Description

W. E. SPARKS.

LOCK.

APPLICATION FILED MAY 1. 1914.

L11 1 5m Patented June 1, 1915.

IIVVTUR IHE NORRIS PETE/PE 50.. PHOTO-LITHO WASHINGTON, D. c,

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VTILLIAM E. SPARKS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT 8: COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOOK.

Specification of Letters Patent.

Patented June ll, 1915.

Application filed May 1, 1914. Serial No. 835,708.

To all whom it may concern.

Be it known that I, WILLIAM E. SrARKs, a citizen of the United States, residing in the city and county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to door locks, and more particularly to looks intended for communicating door rooms in hotels. In locks of this kind, there are usually two thumb bolts operable only from the respective sides of the door, and a key bolt for locking the door, irrespective of the thumb bolts, so that the communicating door may be locked by the bell boy, or other authorized person having the proper key, against opening of the door by unauthorized persons not having a key fitted to the lock.

The primary object of the present invention is to provide simple and effective means for throwing back one, or both, of the thumb bolts at the same operation of the key which retracts the key bolt, so that the door may be unlocked from either side by an authorized person having a key without the necessity of manipulating one, or both, of the thumb bolts separately from the key bolt.

To this and other ends, the invention con sists in certain improvements in a lock of the type set forth, as will be pointed out more fully hereinafter.

In the accompanying drawing, Figure 1 is a fragmentary elevation of a lock embodying my improvements, with the cap plate removed, all of the bolts being in a retracted position. Fig. 2 is a similar view, with the key bolt and one thumb bolt protracted,

showing the key in position to retract both of said bolts. Fig. 3 is a similar view, showing how the protracted thumb bolt is retracted by the key, and Fig. 4 is a reverse view of the lock, with the parts in the position shown in Fig. 1.

Referring to the drawing, the lock case 5 is of usual type, and mounted in said case are a key bolt 6 and two thumb bolts 7 and 8. By preference, the key bolt will be located above the thumb bolts, as shown, and the thumb bolts will have their shanks 7, 8, located side by side, but these features are not important. The thumb bolt 8 is adapted to be operated by a rollback 9, actuated by the spindle (not shown) of a thumb turn at one side of the door. Similarly, the thumb bolt 7 is adapted to be operated by a rollback 10 actuated by the spindle (not shown) of a thumb turn at the other side of the door. Lugs 7 8 project upward from the shanks of the respective thumb bolts, and are adapted to be engaged by an elbow lever 11, pivoted in the case on a post 12. The lever 11 has a depending arm 13 with a laterally projecting lug 14: adapted to engage the lugs 7 8 of the respective thumb bolts. Another arm 15 of the lever 11 extends into the path of rotation of the bit 16 of a key insertible into a keyhole 17 in the case, for the purpose of actuating the key bolt 6. The key bolt is usually provided with a plurality of tumblers, but in the present instance I have illustrated only a single tumbler l8 cooperating with the key bit 16, and with the stump or fence 19 in the usual manner.

An upward extension 20 on the elbow lever 11 passes behind the shank of the key bolt, as shown in Fig. 4., and is engaged by a spring 21, coiled about a post 22. The spring 21 acts on the lever 11 in such a manner as to hold the arm 15 normally in the path of rotation of a key inserted in the keyhole 17 for the purpose of actuating the key bolt.

Suppose the parts to be in the position shown in Fig. 2, with the key bolt protracted, and with one of the thumb bolts, for example the thumb bolt 7, also protracted. When the thumb bolt is protracted, its lug 7 brings up in close proximity to the lug 14 on the lever 11. The key being inserted in the keyhole 17 for the purpose of retracting the key bolt, the key bit, when rotated in the proper direction to retract the key bolt, will first strike the arm 15 of the lever 11, and thereby swing said lever on its pivot 12 carrying the lug 7 to the right with reference to Fig. 2, and thereby retracting the thumb bolt 7, as shown in Fig. 3. As the bit continues to rotate, the arm 15 of the thumb bolt retracting lever passes out of engagement with said bit as the thumb bolt is fully retracted (Fig. 3), and the bit then engages the tumbler of the key bolt in the usual manner and retracts said bolt. Thus, by a single rotary movement of the key, the door is free to be opened without the necessity of manipulating the thumb bolt independently of the key bolt.

As the key bolt is retracted, a shoulder 23 on said bolt engages the extension 20 on the lever 11 and moves said lever back to the initial position, as shown in Fig. '1.

' thumb bolts are protracted from the respective sides of the door, they Will both be retracted simultaneously by the lever 11 as the latter is actuated by the key of the key bolt.

Various modifications of the construction described may be adopted Within the scope 2. In a lock, a key bolt, a thumb bolt, :1- key for operating the key bolt, and a lever actuated by said key to retract the thumb bolt, prior to the retraction of the key bolt by said key; substantially as described.

3. In a look, a pair of thumb turn bolts, and a common retracting lever therefor operated by direct engagement with a key; substantially as described.

l. In a look, a key bolt, a key to operate the same, a pair of thumb turn bolts, a reracting lever common to both of said thumb turn bolts, and a part on said retracting lever extending into the path of rotation of the key for said key bolt at such a point that either, or both, of the thumb bolts is retracted by the key prior to the key bolt; substantially as described.

In Witness whereof, I have hereunto set my hand on the 29th day of April, 1914.

WILLIAM E. SPARKS.

Witnesses:

MABEL A. Bussn, ADELE M. LONGSTEIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

- Washington, D. C.

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