US1184919A - Latch. - Google Patents

Description

A. C. O. BOCK.

LATCH.

APPLICATION FILED III/III. II, 1915.

LR @991 II Patented May 30, 1916.

2 SHEETS-SHEET l.

U n i NI/ENTOR d .A m

A. C. 0. BOCK.

LATCH.

APPLICATION FILED MAR. I1, Isls.

LIMMLQ. Patented May 30,1916.

WITNESS/5S NVENTO? till Ormea.

ALFRED C. O. BOCK, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE YALE @n TOWNE MANUFACTURING COMPANY, 0F STANFORD, CONNECTICUT. f

LATCH.

Specification of Letters Patent.

Patented May 30, 191156.

applicati@ mea March 11, 1915. serial No. 13,631.

To all 'whom itmay concern:

Be it known that ll, ALFRED C. O. BOOK, a subject of the Emperor of Germany, and a resident of Brooklyn, in the county of Kings end State of New York, have invented cer- Ian new and useful Improvements in L: tches; and ll do hereby declare the following to be a full, clear, and exact descrip-` tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. My invention relates toA an improvement in latches, and more particularly to that type in which the bolt becomes automatically dead locked when the door to` which the latch is attached is closed.

rlhe inventlon consists ma latch in which the bolt is retracted by a key or a knob,

and is held retracted by means which move the bolt laterally into contact with holding means, and which will give or yield when the bolt makes contact with the strike plate of the lock, thus releasing the bolt and permitting it to move into deadlocking posi tion within the keeper.

My invention further consists in the parts and combinations of parts as will be more fully explained and pointed out in the claims.

lin the accompanying drawings, Figure 1 is a view of the lock in operative position on a door, a portion of the lock casing being removed to show the operative parts of the lock; Fig. 2 is a view in longitudinal cross section through a door, lock and keeper, showing the door just before the bolt makes contact with the strike plate of the keeper; Fig. 3'is a similar view showing the door closed and the bolt projectedinto the keeper; Fig. 4 is a view of the lock, the removable cover plate being removed and showing the bolt projected and deadlocked and Fig. 5 is a similar view showing the bolt retracted.

1 represents a door, 2 the door vframe and 3 the latch or lock casing secured to the door and carrying a bolt 4, adapted to engage the keeper 5 secured to the frame 2. The bolt 4 is provided with a shank'which rests and slides against the inner face of the lockl casing, and which is bifurcated so as to shank, so that when the dead locking lever hasr been moved to release the bolt, the cam will contact with the shoulder 12, so that a continued rotation of the c'am will then retract the bolt.

The dead locking lever 11 is pivotally'secured to the bolt shank by the pin 13, and 1s provided with shoulders 14 and 14a adapt- .ed when the bolt is projected, to engage the opposite faces of post 6 and positively hold .the bolt .against longitudinal movement in either direction, or in other words positively deadlock the bolt. The dead locking lever is yieldingly held in contact with the' post by a spring 15, and the bolt is projected by the spring 16 secured at one end to the lock casing and at its other end to the bolt shank. rlhe bolt is provided on its outer or front face near its free end with a groove 17 extending 4throughout the Width of the bolt parallel with the end of the lock casing. This groove is slightly wider than the thickness of the end wall of the lock casing, so that in retracting the bolt,when the groove 17 is opposite the said end wall of the casing, the bolt will be moved or tilted forwardly thus forcing the grooved bolt is e'ected by the flat spring 18, secured to the lock casing and bearing against the rear face of the bolt and constantly tending to force the grooved face of the bolt against the adjacent edge of the end wall of the casing through which the bolt passes. The bolt when thus retracted, is held simply by the engagement of the end wall of the casing with the groove in the bolt, so that when the bolt is shifted rearwardly, the groove in the bolt passes off the end wall of the lock casing thus leaving the bolt free to be projected by its spring. rIhe front face of the outer or free end of the bolt, projects slightly beyond the edge of the door so as to engage the strike plate 19 of the keeper 5 as the door nishes its closing moveeenlll@

ment, so that when the bolt is retracted the closing of the door effects the release of the. bolt which then shoots into the keeper and.

locks the door.

By this constructlon I dispense w1th a separate mechanism for holdlng the bolt retracted and for releasing the bolt, thus ma.l

terially simplifyin the construction, lessening the number o parts, and reducing the cost 'of manufacture.

While, I have shown and referred to a groove in the face of the bolt, it is clearly evident that a shoulder to engage a fixed stop on the latch casing or other part would be the equivalent -of the groove, the rear wall of the groove acts simply as a shoulder, and the bolt would operate if the face of the bolt in front of said shoulder were cut away.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a latch, the combination of a casing, a bolt having a shoulder on one face and passing through an end wall of the casing, the free end of the bolt adapted to project beyond the side edge of the'door when the bolt is retracted, means for retracting the bolt, a spring for projecting it, means for deadlocking the bolt when the latter is projected, and a spring for forcing the shouldered face of the bolt against the end wall of the casing whereby the en agement of said shoulder with the end wal of the casing will hold the bolt retracted.

2. In a latch, the combination of a casing, a bolt having a groove in its front face land passing throu h an end wall of the outer projecting end of the bolt for moving it rearwardly to disengage the end wall and groove and a keeper for housing the end of the bolt when the latter is projected.

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

ALFRED C. O. BOCK.

Witnesses:

FRED C. SQUIRES, R. P. REsoH.

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