US571210A - andrews - Google Patents

Description

(No Mod eL) 2 Sheets-Sheet 1 U. W. ANDREWS.

HUTE L DOOR LOCK.

No. 571,210. Patented Nov. 10, 1896.

(No Model.) 7 2 Sheets-Sh'eet 2.

C, W. ANDREWS. HOTEL DOOR LOOK.

Patented Nov. .10, 1896.

UNITED STATES PATENT EETCE.

CHARLES W. ANDREIVS, OF N EW' HAVEN, CONNECTICUT, ASSIGNOR TO THE MALLORY & \VHEELEB COMPANY, OF SAME PLACE.

HOTEL-DOOR LOCK.

' SPECIFICATION forming'part of Letters Patent No. 571,210, dated November 10, 1896.

I Application filed .Inly Z, 1896. Serial No. 597,855. (No model.)

[0 all whom it ntcty concern:

Be it known that I, CHARLES W. ANDREWS, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Hotel-Door Locks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, 1n-- Figure 1, a side view of a hotel-lock embodying my invention; Fig. 2, a side view of the lock with the cap removed, showing both bolts in the retired position; Fig. 3, a lower portion of the lock mechanism, showing the lower or inside bolt thrown outward; Fig. 4,

a perspective view of the lower bolt de tached; Fig. 5, a perspective view of the locking-lever detached; Fig. 6, the grand masterkey; Fig. 7, the pass-key; Fig. 8, the masterkey.

This invent-ion relates to an improvement in door-locks, and particularly to that class known as hotel-locks, that is, locks havin g two bolts, one of which may be operated from the outside and the other from the inside.

In looks of this character it is desirable that some means should be provided to indicate when the door is locked upon the inside. At the same time, in caseof accident, it is desirable that an authorized person should be enabled to unlock the door without forcing or deranging'the lock.

The object of this invention is to arrange and construct the bolts-so that the door may be locked from either side and when looked upon the inside will prevent the insertion of a regular or sub master-key from the outside, and to provide means for the insertion of a grand master-key, whereby the bolts may be thrown from the outside in case of emergency; and the invention consists in the construction, as hereinafter described and particularly recited in the claims.

The case A may be of any preferred construction, arranged with or without knoblatch mechanism, and provided with an outside looking-bolt B, in connection with tumblers G, more or less in number and of usual construction, said bolt being adapted to be thrown by a key entering the outside of the case through the key-slot D. Below the bolt B is the inside bolt E, adapted to be thrown from the inside by a key entered through a key-slot F on the inside of the case and engaging with the key-notch E in the lower edge of the tail E of the bolt. Extending 6o upward through a slot Gin the tail E is a post H, formed on the inside of the case. Mounted upon a stud I, formed on the face of the tail E in rear of the slot G, is a lever or tumblers J, formed at its forward end with an upwardly-extending finger K, which, when both bolts are withdrawn, stands slightly in rear of the head of the bolt B, as shown in Fig. 2, but passes beneath the bolt when the inside bolt E is thrown, as shown in Fig. 3. The inner face of the lever is recessed to receive a spring L, one end of which is secured in the stud I and the opposite end in a slot M in the rear end of the lever, which spring tends to normally hold the lever J in line 7 5 with the tail E of the inside bolt. Near the forward end of the lever is astunip N, which engages with the rear side of the post II when the bolt is withdrawn and with the opposite side when the bolt is in the thrown position, thus locking the bolt in either position. In the upper edge of the lever is akey-notch O, which coacts with a key-notch P in the upper edge of the tail E of the bolt. Extending from the same center as the key-slot D is a narrow slot Q, which will only admit a key having a thin bit, as shown in Fig. 6. It will be understood that the bolts are adapted to be thrown by the same regular key and those of a series by the same sub master-key or 0 grand master-key.

The operation of the lock is as follows: The door is locked or unlocked from the outside by the bolt Bthrough a keyentering the slot D, and may be locked or unlocked from the inside by a key entering the key-slot F and acting upon the under side of the lever J and tail E the key first lifting the lever to clear the stump N from the post H and then throwing the bolt, the stump then passing at one side of'the post II and returning to aposition in front of it, whereby the bolt is held against retraction. In this position the upper edge of the rear end of the lever stands in the path of the key-slot D, as indicated in Fig. 3, so that it is impossible to insert a regular or sub master-key or any other key through that opening, at once indicating to a person on the outside of the door that the door is locked on the inside. When the door is so looked upon the inside, the finger K of the lever J stands beneath the bolt B, which positively prevents ,niovement of the lever J, and hence avoids the possibility of picking the look from the outside. In case of accident or emergency when it is desirable to open the door from the outside after it has been looked upon the inside a grand master-key may be inserted through the narrow key-slot Q and turned to first throw the outside bolt, which clears the finger K. The continued movement of the grand master-key will operate upon the lever J, through the notch O, to depress that end of the lever and throw the stump out of engagement with the post H, and then upon the notch P in the bolt to withdraw the bolt. The key is then turned in the opposite direction to withdraw the bolt B, and thus unlock the door. It will be understood that the escutcheon on the outside of the door is provided with two key-slots corresponding to the slots in the case, one being so narrow as to prevent the ordinary regular or the master key from entering. The locks are so arranged that the regular or sub master-key will operate upon the lower sides of both bolts, while the grand master-key not only operates upon the lower sides of both bolts, but also upon the upper side of the inside bolt.

I am aware that hotel-locks having two bolts adapted to be independently operated are old, and therefore do not wish to be understood as claiming, broadly, such as my invention.

I claim 1. The herein-described lock having two bolts and tumblers therefor, both bolts and their tumblers adapted to be thrown by keys operating upon their lower edges, and the or unlocked position, and adapted with the bolt to be thrown or withdrawn by a key operating upon its lower edge, and also adapted to be withdrawn by a key operating upon its upper edge after the upper bolt has been thrown, substantially as described.

3. In a two-bolt lock the combination with a lower bolt formed with key-notches in the upper and lower edges of its tail, of a lever pivotally mounted upon the said tail, a spring also mounted on said tail and extending into engagement with the rear edge of said lever, an upwardly-extended finger at the forward edge of said lever, a stump on said lever coacting with the post in the case for holding the bolt in the locked or unlocked position, said lever formed with an operating-notch in its upper edge and adapted when thrown to close the key-opening in the outside of the case, substantially as described.

4-. The herein-described lock having two bolts and tumblers therefor, both adapted to be moved by keys operating upon their lower edges, the lock-case formed with two keyslots extending from the same center, and located between the said bolts, one of said slots narrower than the other, and the lower bolt adapted to be withdrawn by a key entered through the narrow slot and operating upon its upper edge after the upper bolt has been thrown, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES IV. ANDREIVS.

\Vitn esses:

FRED. O. EARLE, LILLIAN D. KELsEY.

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