US2759352A - Door lock - Google Patents

Description

Aug. 2l, 1956 L. H. FlsLER 2,759,352

' nooR Loox Filed July 19, 1952 2 sheets-sheet 1 BY wf/4;

Aug. 21, 1956 L. H. FlsLER 2,759,352

DOOR LOCK Filed July 19, 1952 2 sham-sheet 2 T'TOP/VEV nited States Patent M DOOR LOCK Leland H. Fisler, New Britain, Conn., assignor to The American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Application July 19, 1952, Serial No. 299,807

11 Claims. (Cl. 70-210) This invention relates to a door lock and more particularly to a door lock of the cylindrical type having an emergency release for unlocking the lock mechanism when the outer operating knob is dogged against operation.

Such locks, when used on the doors of bedrooms and bathrooms, are usually provided with both a dogging bar which is operable, by means projecting from the inner door knob, to dog the` outer knob against operation, and with means actuated by the latch bolt to cause release of the dogging bar from its clogging position when the door is moved into closed position.

The invention, as illustrated herein, is embodied in the cylindrical door latch operating mechanism disclosed in Patent No. 2,73 3,088 issued to Leland H. Fisler et al., January 31, 1956, which mechanism is provided with a dogging bar for dogging the outer knob against operation as clearly shown and described in my co-pending application, Serial No. 293,338, tiled lune 13, 1952, now Patent No. 2,724,607 dated November 22, 1955, ot' which this application is a continuation in part.

It has been found important to provide such locks with emergency release means which are operable through the outer knob to effect disengagement of the said dogging bar from dogging position and permit opening of the door in the event that the person within the room should be disabled as a result of sickness or accident.

In cylindrical locks heretofore produced, numerous parts have been required for the emergency release mechanism and special constructions, which have added substantially to the cost of manufacture of said locks, have been necessary to support said mechanism.

An object of this invention is to provide a cylindrical door lock having emergency release means which cooperate with the retractor of said lock in a novel manner to cause release of the dogging bar when it is held in dogging position by said retractor.

A further object of the invention is the provision of a cylindrical door lock having emergency release means therein which include a bar that can be urged into engagement with and move the retractor of the lock by means of cam means contained in said lock.

A still further object of the invention is the provision of an emergency release bar which is inserted into the spindle of a cylindrical door lock without requiring special structure in the spindle for its support.

Further objects and advantages` of this invention will be more clearly understood from the following description and the accompanying drawings in which:

Fig. 1 is a plan View of the cylindrical door lock, partially in central horizontal section, illustrating the dogging bar in clogging position and the emergency release bar in normal position.

Fig. 2 is a cross-sectional view of said lock along line 2--2 of Fig. 1.

Fig. 3 is a similar view on line 3-3 of Fig. l.

.(Fig. 4,isfa front view of said lock, partiallyv in central vertical section, further illustrating the emergency release bar.

Fig. 5 is an end View of the outer spindle of the lock illustrating the manner in which the emergency release bar is supported therein.

Fig. 6 is a cross-sectional view, on line 6-6 of Fig. 4, illustrating the guide means for the emergency release bar.

Fig. 7 is a fragmentary plan view of the emergency release bar, with the spindle illustrated in dotted lines, showing the manner in which the bar is supported and guided therein.

Fig. 8 is a plan view of the lock, with parts in section, illustrating the manner in which the emergency release bar operates.

Fig. 9 is an isometric view of said emergency release bar.

Referring to the drawings, it will be noted that the cylindrical door lock disclosed therein is, with the exception of the emergency release bar, the same as that disclosed in my above mentioned Patent No. 2,724,607.

For the purpose of clarity the entire mechanism will now be described.

The said door lock includes a casing, generally indicated at 5,v which houses and supports the latch operating mechanism and includes an inner end plate 6 and an outer end plate '7 having integral tubular sleeves 8 and 9 extending therefrom respectively. The end portion of each of said sleeves 8 and 9 is of a reduced diameter.

A retractor guide 10 is secured between the end plates 6 and 7 and is in the form of a U-shaped member having upper and lower legs 11 and 12, respectively; the inner surfaces of which are provided with longitudinally extending grooves 13--13 for the reception of ball members 14 which support a retractor 1S in the retractor guide. The said ball members 14 are maintained in proper relative position by means of cages 16.

The retractor 15 is preferably formed from a single piece of sheet metal and includes an inner side 17 from which is bent an upper leg 18 and a lower leg 19. The rear portion of each of said legs 18 and 19 has an extension 20 and 21, respectively, which is bent inwardly, parallel to the side 17, to form the outer side of the retractor. The inner side 17 of the retractor is also provided with extensions which are bent perpendicularly to said side and extend across the retractor to provide rollback platforms 22-22 thereon. The extensions 20 and 21 forming the outer side of the retractor and the rollback platforms 22--22 are spaced apart to provide a horizontal opening 23 which extends through a portion of the inner side 17 of the retractor, as indicated at 23-a, for a purpose to be hereinafter described. The outer ends of the retractor legs 18 and 19 are provided with oppositely disposed iingers 24-24 which receive the slotted end of a retractor bar 25 that is secured to the latch bolt 26 of a conventional latch unit 27; said unit being fastened to the casing 5 in a manner Well-known to those versed in the art.

The outer surfaces of the retractor legs 18 and 19 contain longitudinally extending grooves, similar to the grooves 13-13 in the retractor guide, for the reception of the balls 14 which provide anti-friction bearings forv the retractor to facilitate its sliding movement in the retractor guide.

The retractor guide 10 carries a spring support 28 from which projects a pair of fingers that support and guide compression springs 29-29. The free ends of the springs 29--29 project into the retractor, between its inner and outer side portions, and engage ears 30-30 extending from the opposite sides 31--31 of a U-shaped guide member 32; said ears being supported against the rollback platforms .22-22 of the retractor. The sides 31--31 of the Patented Aug. 21, 1956 guide' member 3'2"- extendf across the retractor and are spaced apart aV distance. substantially, equal, to. the. width of the opening 23-23-a. It will be understood that the guide member 32 is retained in the retractor by the springs .-29--29 and that thefsaid springs urgeethe: retractor outwardly into normal position.

The inner sleeve; 8y and' the; outensleeve9 are eachtprovided` with bearing members 33-33f'whinhf titi; within the sleeves, as illustrated in Figs. lto'r4j.andraretlprevented from rotating relatively. thereto byi means of1 a-tab 34 which is'` bent'. inwardly from; eachs. otr said sleevesl and'` projects into a slot 35 extending the entire length of eaclrof-.said bearings. Theformationiothef'tabs 343providcsfaf slot 36in the. inner. andi outer sleeve- 8? and-.9; respectively, which is; in'. alignment with the1 slot-353 inv ther bearings 33-33. Movement of each of thefbearings-longitudnally of its respective sleeve-is prevented by means of:` aunger. 357I which. is bent inwardly. from? each; o' said sleeves into a notch formed in the edge of each: ofi'saidi bearings.

An inner tubular spindle 38 and an outer tubular spindle 39%are rotatably supported byy the-'bearing 33 inI the"- inner sleeverianddn' the outer' sleeve 93,* respectively, tty-apro:- vide ans inner andi an outer actuator fortheretracton Each of saidfspindles s 38 and 39 lhas a segmental vportionv 40iprojecting-therefrom into the i casing 5 and the opposite edges of said segmental portions are bentroutwardly to: provide rollbacks- 414-1-1 whichV engage the platforms 22"-22of the=retractor toboth -limitthe outward'rmovebment!l of theI retractor bythe springs 29, and'eause'rre traction thereof whenA eitherv of l the` spindlesi'is* rotated.' lihevffree end of each' of saidsegmentalportions-I40lis`- upwardly inclined as at'42 tot provide anl abutment 43`beL twecnsaidrollb'acks-41-41ffor a purpose to'behereinafter-*more fully described;

"[he\spindlesv38 and 35i-contain a slot' 44 whichex-tends' the entire' length thereofl and isnormally in-v alignment witlrthe slots S51-and 36- in -its respective lbearing-member; andl'sleeve.

The' spindles 36and 39are'rotatably retained within.v the mechanisme-and prevented from moving axially* there--` in -bymeans ofy annular thrust washers 45t- 45' in--the manner clearly disclosed'in the1 co'pendlng' applicationrof Frank J; McConnell, Serial' No; 275,618, filed1 MarclrSl' 1952.'

Anginnerknob 46: and an outer knob4/ are carried on the spindles 38 and 39; respectively,v andreaclr knob`r hasa shank 48 extending therefrom-which telescopica'll'y receives its` respective spindleA and projects through the` redbcedgportion' ofsleeve to provide a bearing' for outer end of the spindle as clearly illustratedin. Figs.A 1l and' 4.' Each shank portion has aV projection' thereon which extends into` the slot 44 in the ,spindle to transmit' rotationof the knobto the` spindle.

In order., to prevent removal ofA the said knobs from thespindles, tli'ere is provided in each'spindle' a` suitable' knob retainer 49, in the form of'a semi-circular'm'ember havingat'ongue that projects through a slotin the spindle. into apslot inthe knob shank, as illustrated in Fig. 1` and as clearly described in the ,above-mentioned' Patent N'o. 2,733,088fandin my United States Patent' No. 2,73'9006" dated March 20,A 1956. Saidretainer i`s`biasedy into retaining` position by means of a. spring 51'"which' is secured"within the spindle;

Tlie ,entirev mechanism above described `is maintained inassembl'ed' position by a cup-shaped. cover 52"wl`1'ichr extends over the end plates 6 and' Tand has ears 53 thereon' which are bent. inwardly over the,outer, end plate, 7 and thereby permanently secure themechanism. inassembledfposition.

It w-ill\ be-understood fromvthe above ldescriptiorlrthabrota-tion of the. inner knob-46=or the outen-knobv=`47 willfrotatefits.`v respective -spindle and,. througlnt thei engagea menttof'fthea rollbacksr 41.-411 withv the.1pl'atforrnsf;ZZP-22.4

ofirthe.: retfaetorg: causeretraetion: ofrffsaid retractor. tot' 4. Withdraw the latch bolt from the conventional strike (not shown.) to4 permit l opening of. the. door.

The door lock further includes a clogging unit as fully disclosed in Figs, 9, 10, 11- and 13 of the drawings of my above mentioned Patent No. 2,724,607. The dogging bar 54, which is shown in clogging position, has a shank 54-a which extends axially through the spindle and to the outer end of which there is securely attached a pushbutton 55 that is slidable. within-.the inner spindle 38. The saidpushbutton and doggingbar are urged. intonormal. undogging position: by a spring, not shown, that is. containedwithin the spindle and forms a'part of'tliedogging unit as clearly shown in said Patent No. 2,724,607.

The clogging bar has-a llathead portion-l 56whieh extends through the openl inner end of ythe. spindle 38 and through the opening 23-23'a in the retractor to a position between the sides 31-31 of the guide member 32 carried by said retractor. The head portion 56 of the dogging bar has a doggingnger 5.7 extending'therefrom which, when the bar isin normal'undogging positionlies between-the sides of the guide member 32. The .frontI edge ofthe. head portion 56:0f.- the doggingrbarrhas alatx 58 thereon which engages the inner wall of theV spindle when the bar-is inundogging position and an angularly disposed* cam surface S9 which extends from' the, 'at

58'. The opposite edge of the (loggingV bar is provided:y

with'a cam surface 60 and a detent 61= which are disposed adjacent the edgel 62 of they opening 23'a in the side. 10': ofthe retractor.

When it is desired'to dogithe outer-v knob fagainstf opera' tion, ars-shown in Fig; 1.-, the pushbutton 55` is pushedinwardly thereby causing longitudinal movement of thc. doggingbar 54with respect tothe spindle. As tbesardi doggingf bar movesy towards theouter spindle, the cam` surface 59` engages the abutment 43' on the segmentalI portion of' thespindle 33 and rides upwardly onfsaid abutment thereby biasing the head. portionfSt'` 0E the doggingfbar rearwardly, with respect to the'casing'S, to cause entry of the locking finger 57y intofthe-slots44, 35'v and 36- formed'iny the outer spindle, bearing' and? sleeve respectively.

It'willbe noted that, as the bar moves towards the outer spindleand'rearwardly with respect tothe'casing, the'cam' surface 60-will engage the said edge 62 of thefopening'23-azinthe retractor and urge the retractor rearwardly until the detent-61I4 passes said edge and the retractor'springs urgetheretr-actorl into normalpositionto therebycause' engagement of said detent portion 6I with the-side1'7-"of the` retractor to retain-tbe dogging bar in clogging position as clearly illustrated inl Fig; l", wherein operationA of the outer knob and? spindle is prevented.

Should the retractor bel forced' inwardly, either-'by d'e'l pression of! theilatchbolt, which isfseeuredtatbe retract'or inrthe conventional'manner to causeretraction thereof by`v said bolt when the door is moved into closedposition,I or by operationof the inner spindle, the side. portion 117 of the retractorwill be carriedrear-wardlyout of engagement with the detent portion 61Av of the doggingbar'and'thereby permit' the spring within1 the .spindle 38I toreturn said-v ban and pushbutton to normal position;4

Thev doorV lock above described functionsfinl a manner whichl renders itt particularly suitedl for: use on` doors requiringa lock thatzmaybe-dogged against operation'romthe outside and in which said: clogging means islreleasedwhen the innerv spindleis rotated or, intheevent thatsaid dogging-means is accidentally moved. todoggingposition while the door isop'en, whenthe retractor. is movedrearwardly by the latch bolt as the door is closed.

Ihforder totransform said` door lock into one whicliis suited for use on doors of bedrooms and'. bathrooms, whereinmeansare` required to permit undogging'of the outer spindle in cases of emergency, Il have"provided aY simple-and inexpensive emergency release means which are nsertable into the outer spindle of theflock without requiring complete disassembly thereofl.

.Saidiemergenny release means include an-y emergency release bar 63 having a flat disc-shaped head portion 64 which is slidably supported within the spindle 39 and has a shank 65 extending perpendicularly therefrom with an offset portion 66 that is provided with laterally extending ngers 67-67 which are received in diametrically opposed guide slots 68-68 in said spindle 39. Said slots 68-68 extend from slots 69-69 which are formed in said spindle for the reception of the pin tumbler chamber of a cylinder lock which is insertable into the spindle when required.

The slots 68-68 are oiset relatively to the slots 69- 69 to provide abutment shoulders 70, at the outer end of said slots 68-68, which are engaged by the arms 67 67 to retain the emergency release bar Within the spindle. When the emergency release bar is in normal position, as illustrated in Figs. 1, 4 and 7, the arms 67-67 are held against said abutment shoulders by a compression spring 71 which surrounds the shank 65 and has one end abutting the said arms. The opposite end of said compression spring 71 rests in a cup-shaped member 72 that is carried Within said spindle and supported against an ear, not shown, which is bent inwardly from the side of the spindle and pivotally supports the knob retainer 49. Said cup-shaped member is identical to the cup-shaped members employed for supporting the springs in other lock functions such as described in said Patent No. 2,724,607.

The shank of the emergency release bar 63 projects through an opening in the botom wall of the cup-shaped member and has an angularly disposed end portion 73 which extends into engagement with the inner wall of the spindle 39 to provide a support for the inner end of said emergency release bar. Said inner end has an oppositely 'inclined portion that is bifurcated to provide spaced fingers 74-74 thereon that are normally disposed within the segmental portion 40 of the spindle 39 and adjacent the rollback platforms ZZ-ZZ. The forward surface of said spaced lingers is tapered to provide a cam surface 75--75 on each of them.

The emergency release bar is inserted into the outer spindle by rst removing the outer rose, not shown, which is threaded to the sleeve 9 and conceals the locking mechanism and knob retainer as described in said Patent No. 2,733,088. The knob retainer 49 is thereby rendered accessible and may be depressed with a suitable tool to permit removal of the outer knob 47 from the spindle 39. The assembled emergency release bar, cup-shaped spring support 72 and spring 71 are then inserted into said spindle to the position illustrated in Fig. 1; the said spindle being opened slightly by inserting a suitable tool into the slot 44 therein to allow the arms 67-67 to pass therethrough into the slots 68-68. 'Ihe outer rose and knob are then replaced.

When the dogging bar 54 is in dogging position, operation of the outer spindle and knob is prevented since the dogging nger 57 is disposed within the slots in the outer spindle, bearing and sleeve respectively and, as above noted, the said bar is maintained in dogging position through engagement of the detent 61 thereon with the side of the retractor. lf it is desired to release the dogging bar 54 from dogging position from the exterior of the door, a suitable tool 76 is inserted through a hole 77, which is provided in the outer knob, and into engagement with the head 64 of the emergency release bar. The said bar is then pushed inwardly, by means of the tool 76, thereby causing the cam surfaces 75--75 on the ngers 74-74 to ride upwardly on the abutment 43 of the segmental portion 40 on the spindle and into engagement with the rollback platforms 22-22 of the retractor. Further inward movement of the emergency release bar will cause the said bar to move the retractor rearwardly until the edge 62 of the opening Z3-a in the side 17 of the retractor is disengaged from the detent 61 on the dogging bar as illustrated in Fig. 8. The spring contained within the inner spindle 38, which controls the dogging bar 54, will, upon release of said detent, urge said bar and pushbutton into normal undogging position to per"-V mit undogging of the outer spindle and knob.

It will be noted, in Fig. 8, that the spaced ngers 74- 74 on the end of the emergency release bar straddle the dogging bar to prevent interference therebetween as said emergency release bar is moved inwardly by the tool 76. As soon as the undogging of the outer spindle and knob is accomplished, the tool 76 is removed and the spring 71 will return the emergency release bar to normal position so that the door may be opened'by rotation of the outer knob and spindle.

It will be understood from the above description that my invention provides a simple and inexpensive emergency release mechanism for a cylindrical door lock which is easily insertable into said lock and does not require the use of special parts or other mechanism for its support and operation.

I claim: Y

l. A door lock comprising a. casing, a retractor for a latch bolt mounted in said casing, an inner and an outer actuator carried by said casing for causing retraction of the retractor dogging means associated with the inner actuator for dogging the outer actuator against operation; said dogging means being retained in dogging position by engagement with a portion of said retractor, a longitudinally movable bar associated with the outer actuator and adapted to be moved relatively thereto, and means engageable by said bar upon movement thereof for ueging it into engagement with the retractor for causing retraction thereof to elect disengagement of said dogging means from the retractor.

2. A door lock comprising a casing, a retractor for a latch bolt mounted in said casing, an inner and an outer actuator carried by said casing for causing retraction of the retractor, dogging means associated with the inner actuator for dogging the outer actuator against operation; said dogging means being retained in dogging position by engagement with a portion of said retractor, a movable bar associated with the outer actuator and adapted to be moved relatively thereto, and cooperative cam means operable upon movement of the bar to urge it into engagement with the retractor for causing retraction thereof to effect disengagement of said dogging means from the retractor.

3. A door lock comprising a casing, a retractor for a latch bolt mounted in said casing, an inner and an outer actuator carried by said casing for causing retraction of the retractor, dogging means associated with the inner actuator for dogging the outer actuator against operation; said dogging means being retained in dogging position by engagement with a portion of said retractor, an abutment, a movable bar associated with the outer actuator and adapted to be moved inwardly relatively thereto, and cam means on said bar engageable with the said abutment as the bar is moved inwardly for biasing said bar into engagement with the retractor to cause retraction thereof to effect disengagement of said dogging means from the retractor.

4. A door lock comprising a casing, a retractor for a latch bolt mounted in said casing, an inner and an outer tubular spindle rotatably mounted in said casing, rollback means on each of said spindles for actuating the retractor, dogging means carried within the inner spindle for dogging the outer spindle against operation; said dogging means being retained in dogging position by engagement with a portion of said retractor, a longitudinally movable bar carried within the outer spindle and adapted to be moved inwardly therein, and cam means on said bar engageable with said retractor, upon inward movement of the bar, to cause retraction thereof and disengagement of said dogging means from the retractor.

5. A door lock comprising a casing, a retractor for a latch bolt mounted in said casing, an inner and an outer tubular spindle rotatably mounted in said casing, rollback means on each of said spindles for actuating the retractordogging means, carriedr within. the innen spindle for clogging the outer spindle:` against operation; said (loggingy meansbeing retained in doggingposition. by, engagement with atportionof said;retractor,.aY longitudinally movable bar` carried, within, theouter spindle, cam means within` said outer` spindle, and44 meansfor moving saidl bar into engagement with. said. cam means` whereby said bar is biased. into engagement withsaid retractor to cause retractionthereofanddisengagement of. saiddogging means from: said retracton 6. A door lock comprising a casing, a retractor fora latch bolt..mounted,in saidlcasing, an innerand an outer tubular spindle rotatably mounted in said casing, cloggingV means.carriedlwithinthe.inner spindle and movable. into` position to-dog theouter. spindley against operation, said4 dogginggmeans,beingretained in clogging position by. engagement thereof with a portion of-said retractor, aflongitudinally movable bar carried within the outer spindle, means formoving said bar inwardlyl relatively to said spindle,.arr-abutmentin said-outer spindle, and cam means on. said.` bar engageable, withsaid abutment upon inward movement ofsaidzban whereby said baris biased into engagement-w-ith,Saidmetractorto cause rearward movement thereof-.with-respeot. to-the casingto effect disengagement of said-doggingmeansfromthe retractor'. l

7-. A- door-'lock comprising a casing, a retractor. for a latch bolt mounted-.in-said casing, an inner and an outer tubular spindle rotatablymounted-in-said casing, rollback.

means associated witht'the inner spindle for actuating the retractor, a. segmental portion projecting from the outer spindle into the casing; the. opposite edges of saidy segmental portionproviding rollbacks for actuating the retraeton. do'ggingmea-ns earniedwithin the inner spindle and movable. into dogging: position wherein the outer spindle is dogged? againstoperationg. saidl clogging means being retained-in dogging. position by engagement with saidretra'ctor,A a: longitudinally movable barcarriedtwithin the outerv spindle, means for moving said bar in saidt spindle, a cam surface on the end of said bar, and anabutment on said segmental portion; said cam surface` being: adapted: to ride upwardly on-said abutment, upon movement on the bar, whereby saidA bar is biased into engagementtwith the: retracton tot causeA retraction: thereof.-

and disengagement of said (logging.v means from the:

retraetor;

8l A door lock comprising a casing, a' reu-actor fora` latch` boltmountedl in' said casing, an4` inner and an'outer tubular spindle rotatably'mounted in said-casingand eacliV having a knob'thereon; rollback means on each'v of said spindles for actuating the retractor, clogging meansicarried within the inner spindleand'movable into dogging position' wherein, the. outerspindle is dogged against operation, said doggingmeans,beingretained inposition by engagement with a portionv of said. retractor, a longitudinally movablebar carriedwithin--theouter spindle, spring means urging saidbar outwardly withrespect to the'outer spindle andinto its.normal. position, abutment means in the outer spindle. for. limiting outward movementv of said bar by said springtmcans, said bar being accessible'forY actuation thereofY through an: opening in the knob on the outer spindle,Y and' cooperative cam means on said bar andin said. Outer. spindle for biasing the bar. uponr actuationthereofI intoI engagement with the retractor to cause retractionthereofy whereby said clogging means is disengagedy said abutment meansin thcouterspindle to limit outwardmovement ofv saidlbar by said spring means.

111,. A door lockv Comprising acasing, a retractorforA aA latch. bolt slidably,A mountedin said casing and having rollback platforms, ani inner and an outer tubular spindle rotatably mounted-in said casing,` rollback means asso elated withV thezinner spindle for actuating `the retractor",

a: segmental portion extendingv fromthe outer spindle into thecasing'-, the opposite edgesof said segmental portionproviding.' rollbacks-foractuating the retractor, dogs ging meanscarried by.- the inner spindle'for dogging'tne outer spindlefagainstoperation; said dogging means being retained' in: clogging position by, engagement with. af portionl of said retractor', a longitudinally movable release' bar carried. within said outerspindle; the inner end porrtion of said' bar being disposed-in saidsegmental portion adjacent the rollback platforms of the retractorand being provided witha cam\ surface, an abutment on said segmental' portion. betweenv said rollbacks, saidv bar beingaccessible throughH an' opening in the knob onthe outer spindle: to? permit movement thereof'y whereby the endv portionof said bar isy biased: intoY engagement with. said retractor by the cooperative action; of said cam surface and abutmenty yto cause retraction thereofy and disengagementiof: said clogging means;

References Cited in` the file of thisspatent UNITED STATES- PATENTS 1,691,528 Schlage Nov. 13, 1928 1,796,727 Schlage Mar. 17, 1931. 1,991,031 Schlage Feb. 12, 1935 2,038,907 Schlage Apr. 28, 1936 2,293,856 Schlage. Aug. 25, 1942 2,611,635 Cerf Sept. 23, 1952

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