US2193349A

US2193349A - Door lock

Info

Publication number: US2193349A
Application number: US148935A
Authority: US
Inventors: Walter R Schlage
Original assignee: Schlage Lock Co LLC
Current assignee: Schlage Lock Co LLC
Priority date: 1937-06-18
Filing date: 1937-06-18
Publication date: 1940-03-12
Anticipated expiration: 1957-03-12

Description

March l2, 1940. w R, SCHLAGE 2,193,349

DooR Loox Filed June 18, 1937 2 Smets-Sheet 1 ha ig/BMM ATTORNEY.

March 12, 1940. w R, SCHLAGE 2,193,349

DOOR LOCK Filed June 18, 1957 2 skins-sneer 2 INV N TOR.

Nafta/7E A TTORNYI Patented Mar. 12, 1940 UNITED STATES PATENT OFFICE DOOR LOCK Application June 18, 1937, Serial No. 148,935

8 Claims.

This invention relates to a door lock employing an inner and an outer knob, together with means for clogging or rendering inoperative the outer knob, and especially to means for visibly indicat` ing whether or not the outer knob has been rendered inoperative. The present application presents a. modiiication of my former Patent No. 1,944,469, entitled Door lock indicator, issued January 23, 1934.

The object of the present invention is to generally improve and simplify the construction and operation of door locks of the character described, to provide a lock having an inner and an outer knob whereby the latch bolt may be retracted, to provide a dogging mechanism whereby the outer knob may be dogged against rotation, to provide push-button-actuated means in the inner knob for actuating the dogging mechanism and for simultaneously projecting an indicator through the outer knob to visibly indicate that the knob has been rendered inoperative; to provide an inner and an outer spindle whereby the knobs are carried, said inner spindle extending into the outer knob, to provide a key opening 'in the outer knob to permit the insertion of an emergency key; to provide a structure which permits the key to connect with and rotate the` cured to one end, and its outer end sldably` mounted in the outer knob, and adapted to be projected a suiicient distance to function as a visible indicator.

The invention is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a horizontal section of the lock, showing it mounted in a door;

Fig. 2 is a vertical section taken on line II-II of Fig. 1;

Figs. 3 and 4 are perspective views of the rollback portions of the respective spindles; Fig. 5 is a longitudinal section showing the spindles telescoped;

Fig. 6 is a perspective view of the retractor plate and the latch bolt;

Fig. 7 is a perspective view of the dog, together with the flogging lugs carried thereby;

Fig. 8 is a perspective view of the lock housing; Fig. 9 is a perspective view of the retractor plate and the spindles extending therethrough, said View showing the manner in which the dogging lugs engage and dog the outer spindle;

(ci. vri-147) Fig. 10 is a perspective view of the bar, showing the push button at one end and the guide cap at the opposite end;

Fig. 11 is a perspective view of the cap;

Fig. 12 is a perspective view of the emergency '5 key.

Referring to the drawings in detail, and particularly to Figs. 1 to '7, inclusive, A and B indicate the opposite faces of the stile of a hollow metal door, and C the front edge thereof. Form- 10 ed in the faces A and B are openings which are provided for the reception of spindle bearings, as will hereinafter appear; and formed in the front edge C is an opening through which the lock housing generally indicated at D in Fig. 8 16 is adapted to be inserted.

The housing shown in Fig. 8 is rectangular in shape and consists of top and

bottom plates

5 and 6 which are connected by front and rear end plates 1 and 8 and side plates 9 and I0 in 20 which are formed screw-threaded openings.

The housing is inserted in the door through the opening formed in the front edge C, and when inserted is secured by a pair of spindle bearings II and I2 which are inserted through the open- 25 ings formed in the opposite faces A and B of the stile. The spindle bearings are provided with threaded inner ends IIa and I2a which are screwed into the threaded openings formed in the side plates 9 and I0 of the housing and thus 30 secure and support the rear end of the housing with relation toKthe side wall, while the front end will be secured and supported in the opening through which it is inserted.

`Slidably mounted for longitudinal movement 35 within the housing is a retractor plate I3. This plate is guided at the inner end by lugs I4 ex` tending into slots lli-I5 formed in the top and

bottom plates

5 and 6, while the front end is guided by a latch bolt I6 which is secured to the 40 retractor plate and normally extends through an opening 'Ia formed in the front plate.

On the rear end of the retractor plate is a cross-bar I1 and formed in the front thereof is an opening I8 through which extend a pair of tele- 45 scoping spindles I9 and 2|] which are supported and journaled in the spindle bearings Il and I2. Each spindle is provided with a transverse slot to form roll-back sections 2l and 22 which engage the front face of the cross-bar I'I and impart 50 reciprocal movement thereto when either spindle is rotated, and, as the cross-bar is secured to or forms a part of the retractor plate, said plate together with the latch bolt will also be reciprocated. 55

Formed in the front face of the cross bar I1 is a recess 23, and formed rearwardly thereof and extending through the cross bar is a passage in which is mounted a dogging member 24, said dogging member being provided with a pair of dogging lugs 28 and also with a pin 28 which serves as a support and guide for a spring 21 interposed between the dog 24 and the rear plate 8 of the housing. The cross bar I1 is provided with a pair of pins 28 which serve as supports and guides for a pair of springs 29 which are interposed between the cross plate and the rear plate 8 of the housing. The springs 23 normally function to maintain the retractor, the cross bar, and the latch bolt, in the extended position shown in Fig. 2, but they yield when either spindle is rotated so as to to permit retraction of the latch bolt when the door is to be opened. The spring 21 also aids the springs 29 in their function, but in addition thereto actuates the dogging member 24, that is, it tends to maintain the clogging member within the passage formed in the cross bar for its reception, the inward movement of the dogging member in this passage being limited by the dogglng lugs 25. which enter recesses 25a formed in the rear face of the cross bar |1.

Extending through the spindles is a. bar 30. Secured on the inner end of the bar is a push button 3|. Secured within the spindle I5 is a washer 32 which is slotted to permit the vbar 30 to pass therethrough, and interposed between the washer and the pushbutton is a spring 33 which normally serves to maintain the push button in the extended position shown in Fig. 1, the distance to which the push button is' extended being limited by a pin 34 secured in the bar and engaging the washer 32.

In the outer end of the spindle is mounted a cap 36, in the outer end of which is formed a slot 31 which forms a guide'and a support for the out-er end of the bar 30, and which also functions as a keyway for an emergency key hereinafter to be described. The cap is suitably secured to the outer end of the spindle I9.

The lock structure here disclosed is particularly intended for use as an inside lock, that is, to permit a person to temporarily lock the door from the inside while the room is being occupied, for

instance, bathrooms, toilets and the like. No key mechanism is employed, as the locking operation is performed by the dogging mechanism shown in Fig. 7. In order to describe more clearly the operation of the lock, let it be assumed that it is installed in a door as illustrated in Fig. 1 and that a person has just entered a room and desires to lock the door from the inside. In that case, he or she will merely push the button 3| inwardly. In doing so, a notch 30a formed in the bar wil be moved into alignment with the dog 24. This will immediately move inwardly a distance equal to the depth ofv the notch 30a, due to the pressure of the spring 21, and the dog 24 will thus dog the bar 30 against the tension of the spring 33, which normally tends to maintain the bar and button in the full-line position shown in Fig. 1. In addition to clogging the bar against movement, the lugs will at the same time enter the slots 20h (see Figs. 1, 4 and-9 formed in the outer spindle, and

thus will dog the outer spindle and the knobv against rotation. In addition to the two operations just described, a visible indicator will be displayed, as the outer end of the bar will project through the slotted cap 36 to assume the position shown in dotted lines at 3l (see Fig. 1), thus indicating that the room is occupied and that the outer knob has been rendered inoperative. Ii' the person desires 4to leave the room, he or she will merely rotate the inner knob. In doing so, the roll-back portion 2| ot the inner spindle will engage the front faceV ot the cross-bar |1 and force it, together with the retractor plate and latch bolt I8 rearwardly ln the housing. During this rearward movement, the dog 24 and the lugs 25 carried thereby are also moved rearwardly and the outer spindle, together with the bar 30, is undogged and released, the bar being instantaneously restored to the normal position shown in the full line in Fig. 1, by the spring 33; thus the door is summatically unlocked or undogged by a mere rotation of the inner knob and spindle.

The indicator will also be retracted, and the outer spindle undogged or released, upon depression of the latch bolt, as such depression causes inward movement of the retractor and the dog carried thereby,A that is, when such inward movement takes place, the lugs 25 release the outer spindle, and at the same time the bar is released.

If a person has entered a room and locked or dogged the door from the inside, and an emergency should occur, that is, should the person faint in the room, or something of that sort, it is possible to open the door from the exterior by the use of an emergency key such as shown in Fig.A 12. This key has a longitudinally extending slot 40 formed in its inner end, which is adapted to straddle the reduced projecting end 38 of the bar 30. That is, if the door has been dogged fromv the inside, the end 38 of the bar will project through the cap 36, and thus indicate that the door is dogged, but if the key, such as shown in Fig. 12, is inserted, it will straddle the projecting end of the bar and may thus be inserted in the slot 31, and when so inserted it is only necessary to rotate the key as such rotation will rotate the cap and the inner spindle to which it is secured, and when such rotation takes place, the roll-back 2| of the inner spindle will actuate the retractor and release the

dogs

24 and 25, thus permitting the bar to be restored to normal position, and at the same time releasing the outer spindle.

It is not essential that the outer end of the bar 30 be reduced in width; in fact, it might have a width equal to the slot 31, and in that case, when it assumed the projecting position, the projecting end would form a turn-piece whereby the inner spindle could be rotated to open the door from the outside, but the provision of such a turn-piece would make it possible for anyone to open the door from the outside. It is for this reason that it is desirable to reduce the width of the bar 30 so that the use of an emergency key will be necessary, as the door should not be opened from the outside except under emergency conditions.

While this and other features of the invention have been more or less speciically described and illustrated, I nevertheless wish it understood that changes may be resorted to within the scope of the appended claims, and that the material and nish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate.

I claim:

1. In a door lock, an inner and an outer spindle, a knob on each spindle, said inner spindle extending into the outer knob, and said spindle having a key-receiving opening formed therein for the reception of a key, means whereby the inner spindle is rotated by said key; a springactuated dog for dogging the outer spindle and knob against operation; a bar extending through the spindles, said bar normally engaging the dog and holding the dog out of dogging position; means in the inner knob for imparting longitudinal movement to the bar to project the opposite end of the bar through and beyond the outer knob to function as an indicator, said bar simultaneously releasing the clogging member to permit it to dog the outer spindle and knob against operation, and said dog simultaneously clogging the bar in its indicating position; means actuated by rotation of the inner spindle either by the inner knob or by the key for undogging the bar and the outer spindle and knob; and means for returning the bar to normal position when released by the dog.

2. In a door lock, an inner and an outer spindle, a latch bolt actuated thereby, a bar extending through both spindles, a push button in the inner spindle, and connected with the bar, said push button when depressed imparting longitudinal movement to the bar toproject the opposite end of the bar beyond the outer spindle, to function as an indicator, a spring-pressed dog engageable with the bar and automatically entering a notch formed in the bar to dog the bar when the button is depressed, and means whereby said dog simultaneously dogs the outer spindle against rotation.

3. In a door lock, an inner and an outer knob, a latch bolt actuated thereby, a bar extending through both knobs, a push button in the inner knob, and connected with the bar, said push button when depressed imparting longitudinal movement to the bar to project the opposite end of the bar beyond the outer knob, to function as an indicator, a spring-pressed dog engageable with the bar and automatically entering a notch formed in the bar to dog the bar when the button is depressed, means whereby said dog simultaneously dogs the outer spindle against rotation, and means actuated by depression oi the latch bolt for simultaneously undogging the outer knob and the bar.

4. In a door lock, an inner and an outer rotatable knob, a latch bolt actuated thereby, a bar extending through both knobs, a push button in the inner knob, and connected with the bar, said push button when depressed imparting longitudinal movement to the bar to project the opposite end o! the bar beyond the outer knob, to function as an indicator; a dog engageable with the bar and automatically entering a notch formed in the bar to dog the bar when the button is depressed, means whereby said dog simultaneously dogs the outer knob ed to be projected through and beyond the outer knob, means for retaining the indicator in its projected position, and means for automatically retracting the indicator upon rotation of the inner spindle by means of -the key.

6. In a door lock, an inner and an outer spindle, a latch bolt actuated thereby, a bar extending through both spindles, a push buttonin the inner spindle and connected with the bar, said push button when depressed imparting longitudinal movement to the bar to project the opposite end of the bar beyond the outer spindle to function as an indicator, said bar having a notch formed therein and said outer spindle having a notch formed therein, and a spring-actuated dog engageable with said notches when the button is depressed and clogging said members against operation.

7. In a door lock, an inner and an outer spindle, a latch bolt actuated thereby, a bar extending through both spindles, a push button in the inner spindle and connected with the bar, said push button when depressed imparting longitudinal movement to the bar to project the opposite end of the bar beyond the outer spindle to function as an indicator, said bar havlng a notch formed therein and said outer spindle having a notch formed therein, a springactuated dog engageablewith said notches when the button is depressed and dogging said members against operation, a'spring normally tending to retract the push button when depressed, and means actuated by depression of the latch bolt for withdrawing the dog from the notches in the bar and spindle to undog said spindle and to permit the spring to retract the push button.

8. In a door lock, an inner and an outer spindle, a knob on each spindle, said outer knob having a key-receiving opening formed therein for the reception of a key, means whereby the inner spindle is rotated by said key, a latch bolt actuated by either spindle, an indicator within the spindles adapted to be projected through and beyond the outer lmob, means for retaining the indicator in its projected position, and means for automatically retracting the indicator upon rotation o f the inner spindle by means ot the key or upon depression oi' the latch bolt;

WALTER R. SCHLAGE.