US1706644A - Door latch - Google Patents

Description

H. E. WOERNLE DOOR LATCH vMarch 26, .1929.

Filed May 14, 1927 Patented Mar.` 26, 1929.

UNITED STATES vPATi-i-NT o'VFFifcE'.

HARRY E. WOERNLE, or PITTSBURGH, PENNSYLVANIA, AssIGNon To McxINNE'Y i MANUFACTURING COMPANY, 0F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Appiieation mea May 14,

v My invention relates to door latches and locks, and more particularly to a latch devicey of the silent type,

whereby a door may be pushed to closed position and yieldably held in such position, without clicking or other sound. The invention is lespecially useful in connection with the doors of hospitals, hotels, apartment houses, etc.

One objectof my invention is to provide a door latching and locking unit of improved form, and capable of application to doors, without materially altering thel structure of such doors.

Another object of my invention 1 s to provide a latching device that is noiseless in operation. Y Another object of my invention 1s to provide a latching device of Vthe ysilent type that is readily adjustable, but which is rigidly supported against movement independently of the adjusting means.

Still another object of my invention is to simplify and improve door-holding devices generally.

Some of the yforms which my invention may take are shown in the accompanying drawing, wherein Figure 1 is a perspective view of a door-latohing and locking unit, removed froin a door; Fig. 2 is a perspective view of a keeper plate which the lock b olt of Fig. 1 engages when in operative position; Fig. 3 shows a co-operating ykeeper or striker for the latch device of Fig. 1; Fig. 4 1s a perspective view, showing the latching device independently of the lock of Fig. 1; Fig. 5 is a view taken on the line V-V of Fig. 6, and showing the latching members of Figs. 3 and 4 in position in a door structure, an Fig. 6 is a View taken on the line VI-VI of Fig. 5.

In Fig. 1, I have shown a door lock 7 which may be of any usual form for insertion'in the edge of a door in the usual manner. The bolt 8 of the lock co-operates with akeeper or striker plate 9 that may be 4mounteol on a door jamb such as shown in Figs. 5 and 6.

The lock 7 is secured to'a face plate 10 in any suitable manner. The face plate, near its lower end has a rectangular casing 11 formed integrally therewith or fastened thereto by welding or in some other manner. A block 12 extends into the casing 11, through the rear end thereof, and has ver- Doon LATCH.

1927. serial No. 191,374'.

tically Vspaced` tongues 13 that :project through an opening in the face plate '10. Screws'14 extend loosely through the face plate and have threaded `eng'agementwiththe upper and lower endjof the block 12. [Compression springs 15 surround the` screws l14 and exert sufficient pressure to hold theheads of the screws in snug engagementwith'the The screws 14 serve as: a

riveted in position. The screws 14 are'so ad'- justed that the latch head 16 will project far enough to engage a depression in a striker plate or keeper 18 which is fastened to a door jamb 19, when the door 20 which -carries the latch is moved to closed position, as `shown more clearly in Fig. 6. v

The latch device 16, beingof rubber, is not only noiseless, but will yield suiciently to enable it to pass from the outer reduced edge of the striker plate 18 over an intermediate raised portion and into the depression near the mid portion of said plate. It will be understood that instead of providing a depression in the plate 18, a protuberance could be formed thereon in position to engage Vthe roller and releasably hold the door against swinging open.

The screws 14 serve as tie bolts, to rigidly d hold the block 12fwhich carries the roller,

` cept when the screws 14 are turned to e'ect adjustment of the latch head l16 toward the striker plate.

The casing 11 may be dispensed with, but I prefer to employ the same as a guiding and supporting element for the block 12 which has a suiciently snug lit therewith to avoid clicking noise when the roller 16 engages the striker' plate.

I claim as my invention l. Latch structure comprising a face plate, a `block disposed rearwardly of said plate and having a 'nose portion extending therethrough, and an adjusting screw rotatable in said plate and having threaded engagement with said block to vary the extent to which the said nose portion extends through the plate.

2. Latch structure comprising a face plate, a pair-of adjusting screws rotatably supported by said plate l and extending therethrough, a block having` a nose portion extending through the 'tace plate at a point between the said screws and having threaded engagement with the screws.

3. Latch structure comprising a face plate having an opening therethrough, va casing open at Aits rear side and disposed against the rear face of said plate, va block extending into Said'casing and having a nose portion extending' to the front ot' the plate, and adjustable means for rigidly supporting said block against rearward movement relative to said casing.

' 4, `Latch structure comprising a face plate having an opening therethrough, adjusting screws supported bysaid plate and extending therethrough, a block having threaded engagement with the screws and normally spaced from the face plate and a yieldable latch head carried by said block and ncrinallyextending through said opening, at avpoint between the said screws. v

5. Latch structure comprising a face plate, a block extending rearwardly of said face plate and normally spaced therefrom, a yieldable latch head carried by the forward end ol said bleek, and an adjusting screw rotatably supported in said plate and having threaded engagement with the block, to vary the position 'of said head with respect to the face plate. I ,l 1

6. Latch 'structure comprising `face plate, a block extending rearwardly ot said tace plate, a yieldablelatch head carried by the forward. end oi' said block, an adjusting screw rotatably supported in said plate andhaving threaded engagement with the block, to vary the position of said head with respect'to the 'face plate, and means for preventing outward n'iovenient Yof the screw with respect to the face plate.y Y

` ln testimony whereof I, the said HARRY E. WonnNLn, have hereunto set my hand.

HARRY E. WOERNLE.

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