Untitled record

Application filed January 30,1891. Serial No. 379,681. (No model.)

To all whom it may concern:

Be it known that I, Thomas Lyons, a citizen of the United States, residing at New Britain, in the county of Hartford and State 5 of Connecticut, have invented certain new and useful Improvements in Stops for NightLatches, of which the following is a specification.

My invention relates to improvements in io stops for night-latches, and the objects of my improvement are simplicity of construction and efficiency in operation.

In the accompanying drawings, Figure 1 is a front elevation of so much of a latch as is 15 necessary to show my improvement, the capplate being removed and a portion of the faceplate being in section. Fig. 2 is a like view of a portion of the same with the hub locked by the stop. Fig. 3 is a transverse section on 20 line x x of Fig. 2, looking toward the faceplate. Fig. 4 is a horizontal section on line y y of Fig. 2, the stop being shown in elevation. Fig. 5 is a face view of the hub and stop with a portion of the case, showing my improve25 ment embodied in another form; and Fig. 6 is a like view of the same with the hub locked by the stop.

A designates the case; B, the face-plate; C, the latch-bolt; D, the latch-lever, and E the 30 outside half of the divided hub, the other half of which is designated by the letter F in Fig. 4. These are all substantially the same as in ordinary latches. The outer half E of the hub is provided with a flange having a lock35 ing-notch 7, substantially the same as inordinary latches, excepting that it is somewhat wider.

G designates a rotary stop having one bearing in the face-plate B and another bearing 40 8 Γη the lock-case which supports said stop in position so that it can be partially rotated when desired, and at the same time it is confined against lateral movement. The outer or face-plate end of said rotary stop is pro45 vided with any suitable means for turning it— as, for instance, a slot for the application of a driver. Upon the inside of the face-plate I form on or attach to the body of the rotary stop G diagonal stops 9 9, arranged diamet5 c rically opposite each other and acting upon the front and rear plates of the case to limit the rotary motion of the stop G to one-quarter of a revolution. This is best seen in Fig. 3, in which position the stop is free to be rotated one quarter-turn to the left, but cannot 55 be turned to the right.

In order to prevent the bolt from accidental rotation when turned to its limit in either direction, I provide the friction-spring 10, which presses against the piece on which the stops 60 9 9 are formed with sufficient friction to hold it in place. At the inner end of the rotary stop G there is a flattened head 11, the width of which in its greatest dimensions is sufficient to substantially fill the notch 7 in the 65 front part of the hub when the widest part stands in a vertical position, as shown in Fig. 2. The middle portion of this head may be cut away entirely or made so thin as not to interfere with the turning of the hub when 70 the stop is turned with its widest part in a horizontal position, as shown in Figs. 1 and 4. In this position the hub is free to oscillate and operate the latch; but when the bolt is turned into the position shown in Fig. 2 75 the hub is locked.

Instead of having the notch in the hub and the head or locking projection on the rotary stop, their position may be reversed, such a reversal being shown in Figs. 5 and 6. In 80 these views the locking projection 111 is formed upon the latch-hub, and is of a cylindrical form, while the notch 77, Fig. 6, for engaging said projection, is formed in the inner end of the rotary stop-bolt. In this form the 85 cylindrical projection 111 should be substantially in axial alignment with the rotary stopbolt G. When the bolt is turned to bring the notch through it into a vertical position, as shown in Fig. 5, the hub is free to oscillate 90 for operating the latch, the projection 111 passing unobstructedly through the notch. When the rotary stop is turned so that the slot through it extends in a horizontal position from front to rear, as shown in Fig. 6, 95 the hub is locked, as the projection then engages the walls at the top and bottom of said slot and prevents it from turning.

I am aware of the latch shown and described in the application of Henry E. Russell, Jr., 100 Serial No. .370,851, filed November 10, 1890, and I hereby disclaim the same.

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