US2435238A - Door lock - Google Patents

Description

Feb. 3, 1948. uw. R. scHLAGE DOOR LOCK Filed July 23,' 1945 4. m UTM m 5m e l INVENTOR.

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Patented Feb. 3, 1948 UNITED STATES PATENT OFFICE Schlage, deceased,

executrix of said Walter R. Schlage, assignor to Schlage Lock Company,

San Francisco, Calif., a corporation of California Application July 23, 1945, Serial No. 606,580

4 Claims.

This invention relates to a door lock especially adapted for bathrooms, lavatories and the like where it is desirable to lock the door from the inside only, and further to a lock which is adapted for installation in thin doors.

The object of the present invention is generally to improve and simplify the construction and operation of a lock of the character described; to provide a lock in which the spindle and the knobs carried thereby are adapted to be dogged against rotation; to provide a door lock having a tubular spindle with a rollback member formed thereon which cooperates with a retractor plate to retract a latch bolt; to provide a dogging mechanism which is mounted within the tubular spindle and which is operated by a push and a pull button projecting through the face of the inner knob, said button when pushed inwardly causing the dogging member to enter an opening in the retractor plate and thereby dog the spindle and knobs against operation;` to provide a friction member for normally retaining the dogging member and actuating button either in dogging or released position; and further, to provide means for releasing the dogging member either by pulling outwardly on the push button or by depressing the latch bolt or by insertion of an emergency key through the outer knob.

The door lock is shown by way of illustration in the accompanying drawings, in which:

Fig. 1 is a horizontal longitudinal section showing the lock installed in the door;

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

Fig. 3 is a view similar to Fig. 1 showing a modified form of the invention;

Fig. 4 i-s a perspective view of the retractor plate and the latch bolt carried thereby;

Fig. 5 is a perspective view of the push and pull button together with the dogging mechanismv actuated thereby;

Fig. 6 is a perspective spring;

Fig. 7 is a perspective view mechanism actuated by an emergency key; and

Fig. 8 is a side elevation of an emergency key.

Referring to the drawings in detail, and particularly Figs. 1 and 2, A indicates a door in one edge of which is cut or otherwise formed a rectangular-shaped horizontally disposed opening such as indicated at B. The opposite sides of the opening are covered by side plates 2 and 3 which are secured to the door in any suitable manner and each plate is provided with. an outwardly View of the friction of the dog releasing 2 extending bearing hub 4 provided for the reception and support of a tubular spindle 5.

Insertable through the outer end of the opening B is a U-shaped frame which consists of a pair of legs 6 6, the inner ends of which are connected by an end section 1 while the outer ends are bent outwardly to form a pair of lugs 8 8. A latch bolt guiding plate 9 covers the lugs and as both the lugs and the plate are perforated, screws I0 may be inserted to secure them in place.

A retractor plate II is slidably mounted between the legs of the U-shaped frame. Both legs are slotted as at I2 for a portion of their length and as the lug I4 i-s formed on each side of the retractor plate and extends into the slots, it is apparent that the retractor plate is supported a11d guided by the legs of the U-frame and as a latch bolt I5 is secured on the outer end of the retractor plate and extends through the latchbolt guiding plate, additional support and guidance is provided.

The retractor plate and the latch bolt I5 normally assume the extended position shown in Figs. 1 and 2 due to the pressure of a compression spring I6 interposed between the inner end ofthe retractor plate and the end member 1. Two openings are formed in the retractor plate as indicated at I7 and I8. The purpose these openings serve will hereinafter be described. f

The tubular spindle carries an outer knob I9 and an inner knob 20 and they may be permanently secured thereon in any suitable manner. The spindle is slotted from end to end as indicated at 2| and this slot forms a guide fora plate 22 which is mounted within the spindle. One end of the plate terminates in the dog 23, onev face of which is cam-shaped as shown at 24 and a cooperating cam-face 24a is formed in the opening I'l of the retractor plate. A push orpull button 25 is attached to the opposite end of plate 22 and this button extends through the face of the inner knob 20. A bow-shaped flat spring 26 (see Figs. 1 and 6) is carried by the plate and engages the inner surface of the spindle, the springs serving the function of frlctionally resisting movement of the plate and button so as to retain the dogging member either in' dogging or released position.

In actual practice if a person enters a bathroom, the door of which is equipped with a door lock such as here shown, and desires to lock the door, all that person has yto do is to push the button 25 inwardly. Such inward movement of the ,button .and the plate 22 causes the dog 23 to enter the opening Il of the retractor plate and thereby dogs the spindle against rotation by either of the knobs. For instance, if a person should grasp the outer knob and attempt to rotate it, that person would find the knob incapable of rotationeas anysattempt toirotatethe spindle by meanstofthe knob .zwouldbe stopped .by the dog 23 engaging one or another of the side walls 11a or I'Ib of the opening l1.

if the person occupying the room desires to open the door, that person will merely pull the button outwardly, thus wthdrawingthedogl from the opening I l', thereby leavingthefspindlef freetorbe rotated by either the inner :or-the zouter'iknob.

The spindle has a rollback-member'formed thereon by cutting a cross slot 29 partially through the spindle. This rrollback -passes through the opening I8 formed on the retractor plate and engages the flat surface 18a. or-medat one end of said opening. When the spindle is l rotatedftherrollback28eengagesvzthis Fflat surf ace and as sucheauses'retraction.oraretractor plate and-.latch'zboitfbut -whenthespindle vor the vknob -;.by which ,it is -,rotated;isv released,` the compresesionspringfl drestoresa-ll partsttofaassumenormal pposition.

.-It could happen .that ,;aperson, f not familiar zlwithtthe, function-ofthaalocmprthat a' childv playing with git, Imight@opennthefdoor, .then depress thezbutton andfshutor-slamthe .door closed. If

that should happen, the inclined face of thelatch bolts l fwouldeengage thezstr-ilreiwface.V .ofthe door :frame and thus cause depression-tof -the latch tbolt. vuchdepressicn wouldcausethe camfface al4a toengage theam face-:24 onf the dog 23, and `..tnus Vforce; the fdogsoutrof the ,opening l1 zto asesumethe .position,shown-in :Fig.\ 1. lil-hns` the dog :mayfbegreleasem eithferzbyt` depression of ftheV latch aboltflsor byfpulling autwardlyaon the fbutton25. fInstanc-:esarevknownavhere fa'.child:has entered a :bathroom 1- or wherewa personbccupying --it. vhas tainted or become otherwise incapableoffopening af door-afterfentermg-andz locking-zit. In such :instances itfisfdesirable,-tovgprovidegan:emergency :key whereby thendoorqmay be ,openedifrom-the eexterior. :To :accomplish 'this lthe mechanism .sshownf in thefmodication of :Fig i3' `is employed. .This mechanism ffconsists. ofta plate Adll amounted .within the.- spind-leand 'in the :fouteriend thereof. This plate-.iis slidably mounted in @the -keyvvay vof tthe .spindle fandfisnormally` held in =the y position shown in Eig. :31byrafspring 3|. .vfAi pinzorflug Y32 fis -iformedfen the-inner send 1 of theifplate. VAn opening a'ilisiformedwin the :outerknobtinealigm ementfwithmheplate. Af'A-fkey :315i inthe form of a suchffaszshownfinflig..zmayfbei inserted in this :hole and when t the :key is y pushed inwardly .it pushes the y; plate 38 inwardly, thus .causing .herpinficrplug f32 .f tosenter ther opening H of :the :retractorplate andgpushnthe-dog 23 out-iof -enggagement :there-with. .Theymoment the key is rremovedzthefplatec: freturns tofnormal position zand-fasthefspindlefis now undogged, the-door may thel opened.

The rlock as `a fwhole Lmay, fof icourse, be used `withoutril-ie =emergencyrkeyfiand releasingmech- ,fanismsandi-,that formfof lockfis shown'in'Figs. 11 @trldi-Ztbut Wheneverffdesired, f the 'form of lock shown in Fig. 3 may be employedgandwhile"this androther features :of f the invention :have fbeen more.orilessrspecifically ,described and illustrated, itrshDu-ld. be..understood .thatzchanges maybe rek.sorted ,to withinthescope of .theappended claims Land .thatfthe materials-and nishof the several starts employed :may `.be :zsuch :as vthenexperience On the other hand,

4 or judgment of the manufacturer may dictate or Varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. In a lock, a latch bolt, a retractor plate sevcured to the flatch bolt, a rotatable tubular .spindle passing through the retractor plate and having a rollback member formed thereon which is engageable with the retractor plate to retract the latch bolt when the spindle is rotated, a dog fslidably mounted within the spindle and engageable 'with the retractor plate to dog the spindle ,against rotation, `and means on the retractor plate torundogithe spindle when the latch bolt is depressed.

2. In a lock,-a"latch bolt, a retractor plate secured to thelatch bolt, a rotatable tubular spindle passing through the retractor plate and having asrllback member formed thereon which is engageable with the retractor plate to retract the latch bolt when the 1 spindle'isirotated, a dog slidably :mounted within thespindle' and engageable with the retractor plate'to Adog kthe spindle againstrotation, means on'the retractorplate to undog the spindle when thelatch 'bolt is "de- ',pressed, an .inner .knob ron .the spindle, and a V.push andjpultmember 'projecting through said passing-'through the :retractor lplate and having `arollback member. formed thereon which is-en- ',gageable with the retractor Vplate to retract the `latch bolt when the vtspindleis rotated, a slot zformed in the spindle and extending longitudinally thereof, :a plate :slidably mounted in the .spindle and guided bysaid'slot, a dog on one end of the plateiand Aa'push fand pull member on the opposite -end of `the plate'and extending through van inner knob secured on the spindle,

Vsaid member adapted to :move the dog into or out of engagement With'the retractor plate to undog or dog the spindle-against rotation.

f4. In a lock, a latchbolt, a retractor plate'se- ,cured to the latch :bo1t, a 'rotatable tubular spindle passing throughthe retractor plate and v`having a rollbackmember vformed thereon which is engageable with'theretractor plate to retract ,the'latch-bolt whenthe spindle is rotated, a slot formed in the spindle and extending longitudi- Anally thereof, .a plate slidably mounted in the spindle and guided by said slot, a dog on one end of the plate and atpush and pull member on the opposite end of theA plate and extending through an inner knob secured lon the spindle, said member adapted to movethe'dog into or out of engagement withthe retractor plate to undog or dog .the spindle against rotation, and means actuated by depression of the latch bolt for ,moving .thedog away from .dogging position.

WALTER R. SCHLAGE.

REFERENCES CITED The following references are of record in the lile of this patent:

UNITED STATES PATENTS Number Name Date 1,387,888 Holt Allg. 16,1921 1,489,675 Schlage Apr. 8, 1924 2,038,907 schlage Apr. 28, 1936 2,361,734 Baume Oct. '31, 19.4.4 1,755,434 Ellingson Apr.22, 1930

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