US2665160A - Door control mechanism - Google Patents

Description

Jan. 5, 1954 o. v. PUZlK DOOR CONTROL MECHANISM 5 Sheets-Sheet 1 Filed Dec. 7, 1949 5 Sheets-Sheet 2 Filed Dec. 7. 1949 m V m 0 Jan. 5, 1954 o. v. PUZlK 2,665,160

DOOR CONTROL MECHANISM Filed Dec. 7, 1949 5 Sheets-Sheet 5 INV-ENTOR.

0770 V Puz/K A r TOR/V15 rs.

5 Sheets-Sheet 4 I Hi I Jan. 5, 1954 o. v. PUZlK DOOR CONTROL MECHANISM Filed Dec. 7. 1949 INVENTOR. 0770 l/ Pz/Z/K Arm/Mfrs.

Jan. 5, 1954 o. v. PUZIK DOOR CONTROL MECHANISM 5 Sheets-Sheet 5 Filed Dec. 7, 1949 INVENTOR. 0770 1/. Puz/K Patented Jan. 5 1954 22665160 .I DOD RCONTROL MECHANISM l OttO V. Pliiikf Wiiloughby; OhimfaSsignor; by mesneiassignments; to Rudolph I." Schohitzer,

".Glewelandgsohioi AppliatioiivDceniber 7, l94 9 Serial-No.131,627

1 10 Glaims: 1 "This invention relates to door' control mecha"- m'smsand more particularly toimprovementsnn door-latching and door locking apparatus especially adapted -for-- useon the doors of automotive-vehicles.

It wil1.:be understood however that although my invention is i1lustrated-and described :herein as embodied "in arr'automobiledoor it may readily lbemtilized in= connection' with-doors"'*or closures for differenttypes pt structures.

L ln /thel l col-pending Ur 1ited -Statespatent applications of Angelo R! deVito-;-' Serial N03 "8 9 -540, filed... April-25, l 949, "-=and Leonard *J. Wagner;

controi mechanisms= are disclosedand"claim-ed whereinanoutside -oper'ating -m'ember (siich? as aahandle; push b'uttong or the like) is em'ployed not onlyzto perform its -normal latch releasing function but:also-; by 'adistinctive manipulation,

to so? operate ither:dooi "locking meehanism' as -to H efiect automatic locking of the -door;-upon"c1osing thereof, without use 'of a keyJ It'isthe'gen eral object oil the present'zinvention' to provide a doors-control mechanism of this general type in which the possibility 'of inadvertent locking of the door is substantiaily-v eliminated. T

Other. objects; of trmy in-ventiori includefi the provision of means forp'reventing lock preset ting. movement: 'of the 'outside actuatingmem-- ber of a; door; :contrornmechanism' exceptfivhen the door is open and; the l atch -is unlatched g and, the provision ofzla rugged and fiectiv 'bl'ocking means. for; preventing; :rlockin'g manipulation -'-of' the outside operatingvmember of door control apparatus of =theiztypei disclosedin said"--- above= noted 'coependingw Unitedzzstates paten applications without increasing-the cost otthe-num berof parts of the mechanism;

The above "and? other: objects ofmyinvention will appear lfromlithe following description of several Y embodiments xthereof, reference'being'had tothe accompanyingdrawings inwhichz i.-'Figure l is a fragmentarwoutside"side "e1eva-- tional view "of an automo'bilefdoorin whit-horny improved door control "mechanism, is installed, the door being shown" in 'closed. andelockedwpo sition;

Figure 2 is a verticallcross=sectionalviewitakem substantially on line 2-.1-2 of Figure}; 5 Figure 3 is aldetachedm viewof;the: doorconof simplification member being isho'wn in a its, preset position and bhdBtGIltTIlOh 'yet having been released b'y.the i'operatonforireturn to its latchi'released posiion;

Figuretjs aview.'general1y'similar to' Figure 3 but i11ustrating..'"my invention as incorporated in a differentitype. of latch mechanism, the. de-

3 tent being in its latch holding" "position andlthe lock member beingin locked; position *"Fig'urejjlo isarveitical' crosseseotional view talgems'ubstantia'lly' on line '1'] 0- 10 ofFig'ure 9; "Figure" 11' iswa View generally,similarito' Fi'gure 915111; with the 100k? actuating gmernber, omitted forisimplific'ation;"the deteht being illustrated; in

locking'position;

'Figuref 12"i-s. a vertical trosssectionalv-view taken substantially on line I 2-?! 2). of Figure .11,

" th'e'lock actuatingmemberI-being included irLthe view;

Figure 13 is aiviev'vqenerally siniilan to" Figure 11 bi t ilhistratinglthe' latch member in'its secondary-j position, "the; phantom line position .of the detent indicating thatoutside l. presetting of the lock cannot *befiebted Whenlthelatch is in -secondary position; and

Figure l l is a vertical, cross-sectional "View generallysimilarto Figures 10fand12 butshowing the' 'locky member in "unlocked. position, 7 and the detent in latch released position. by virtue of actuation of the inside remote, .co'ntrol mechanism.

As illustrated in Figui-es 1" 'to. '8 inclusive, my invention is incorporated'in a latch mechanism of'the general typedescribed and'fclaimed inrthe L AllenU: S; patent application. Serial No. 131,296; fildDecember 6; 1949, and further describedand flcl'aimed in thesaid" United States patent application of Leonard J; "Wagner? Serial No. 98,001, filed June 9, 1949, and cross-reference is hereby made to said co-pending applications in which certain subject matter is claimed which is illustrated and described but not claimed herein.

Referring now to the drawings, a fragmentary portion of what may be considered to be the left-hand front door of an automobile is indicated at C. The body pillar P carries a keeper member (not shown) which co-acts with the latch mechanism mounted within the door C. Handle I is fixed to the door and houses at one end an outside operating member which, as illustrated, takes the form of a push button 2 suitably supported in a tubular guide 3 and provided with an operating plunger 4. The spring 5 holds push button 2 in its normal no-operating position, seen in Figure 2, except when pressure is exerted by the operator.

It will be understood that although I have illustrated the outside operating means for the door control mechanism as a push button, a suitable lever, pull handle, turn handle, or other device might be employed to effect outside operation of the door control mechanism and accordingly the push button 2 is to be considered as being merely illustrative of one form of outside operating means.

The push button guide or housing 3 is suitably mounted on and extends through the outside panel 6 of door C. The inner door panel i and a door free edge wall 8 enclose the latch mechanism in usual manner. In Figure 2 the window glass is seen at 3 suitably supported in a glass-run channel l and the inside garnish molding is indicated at I I.

As is clearly seen in Figures 2 and 4 my latch mechanism includes a frame structure having a base plate portion l2 and a side flange portion 13. Supporting screws extend through the free edge wall 8 into the threaded holes l4 (Figure 2) to secure the latch frame structure firmly in position on the door. A bifurcated latch member L is secured on a latch shaft !5, the flattened end of which is seen in Figure 2, which is rotatably supported by a suitable bearing (not shown) carried by base plate l2. Shaft l5 extends through an aperture (also not shown) in the edge wall 8 of the door and the latch member L is mounted at its outer end on the outer side of edge wall 8 in position to coact with a keeper pin (not shown) mounted on the adjacent doorframe in a well known manner and as is fully described in the Rudolph I. Schonitzer Patent No. 2,094,413 and in the Edwin L. Allen copending United States patent application Serial No. 746,521. Mounted on the shaft 15 adjacent the inner surface of base plate I2 is a latch plate member generally indicated at M. The spiral latch spring It has its inner end secured to the inner end of shaft l5 and its outer end anchored to the side flange I3 of the latch frame.

In common with the latches of the abovereferred to Schonitzer Patent No. 2,094,413 and Allen application Serial No. 746,521, latch spring 96 at all times urges the latch member L in unlatching direction (clockwise as seen in Figure 2) and, as latch plate M is mounted on shaft l5 for movement with latch member L, it will have corresponding rotary movement. A cover plate or disc 5'! for the spring I6 is also mounted on the end of shaft l5 and is shown partially broken away in Figure 2 to permit a direct view of the main latching tooth l8 and secondary latching tooth IQ of the latch plate M. Circumferentially spaced from secondary tooth It on the latch plate M is an unlatching stop lug 29, the function of which will be later described. the portion of plate M indicated at 29 and extending counterclockwise from the secondary latching tooth [9 may be termed the blocking element or blocking element portion of latch plate M. It is spaced from the unlatching stop lug 26 by a relieved or cut away portion or recess indicated at 20" and the functions of elements 26 and 20 will also be described later.

As seen in Figures 2, 3 and 4 the parts are in door latched and door locked positions. The latch member L has its depending bifurcated legs in position to encompass the keeper pin (not shown) and hold the door in closed position. In order to maintain the latch member L in the full latched position of Figure 2 a detent member, generally indicated at D, is provided. A pin 2| carried by base plate I2 forms a pivotal support for detent D and the downwardly projecting arm portion 22 of detent D has formed thereon a latch holding portion or pawl 23. To constantly urge detent member D in latch holding direction (clockwise as seen in Figure 2) a spring 24 is provided which is supported and held in position by an enlarged head on pivot pin it and which has its end 24 fixed by bearing against the outer convolution of spring [6 and its free end portion 24" engaging the offset portion 25 of the transversely extending arm 26 of detent member D to urge same in latch holding (clockwise in Figure 2) direction.

Figure 5 illustrates the door open or unlatchcd position of latch member L and it will be understood that, when the door is moved from open to closed position, latch member L engages the keeper on the door frame and moves in counterclockwise direction into the latched position of Figure 2. As spring 24 urges detent D in latch holding direction the latch holding pawl 23 of detent D will, during closing of the door, first drop into the notch l9 behind the secondary latching tooth i9 and then, as the door reaches full latched position, drop down into latch holding position as seen in Figure 2 in engagement with main latching tooth it. To release the latch mechanism the detent D is actuated, in a manner to be later described, to move the lower arm portion 22 thereof in counterclockwise direction (Figures 2 and 3) until the pawl clears the outer end of tooth I3 as seen in phantom lines in Figure 3. This will permit the latch member L to rotate in clockwise or unlatching direction until it reaches the unlatched position of Figure 5 in which the unlatching stop lug 20 on latch plate M is in engagement with a corresponding stop portion or lug 2? on detent D. Movement of detent D in latch holding direction is limited by engagement of a projection 28 on the end of lower arm 22 of detent D with the outer edge face of latch plate M. This engagement prevents the pawl 23 from striking the edge of latch plate M when it snaps into latch holding position under the influence of spring 24. It will be noted that the stop portion 21 on detent D projects out from the transverse arm portion 26 thereof and is adapted to limit movement of detent D in unlatching direction by its engagement with the blocking element portion 2!! on latch plate M. This blocking o limiting of detent D is clearly indicated in the phantom line position of detent D in Figure 3. However, when the latch member L I modate the looking .mecha reaches its 1 full -unlatehed Dm y' e ove e o in e a eh into, its looking position -.as; seethin -Fig e {I and;- is indioated by thethph tornnline aesiisions-ofdetent D andlat h-pIate- M in; Figur This furtherlockingmovement of detent D; ,possi e when the latch 1 member and latch plate; are full 1 unlatched positionsubeoause t e step per v tion- 2'! of deten-t D can enter -the elieue or. cut; away c nrl t hi i lateMp: he b ects: 6 d: n o s o s: r an eme t 'W-ilhbe ei-s: seribedlaten;

The detent e em -lw speakin ,li s, 1, 110:; stantially; in the p1ane; o,f theiateh plateM anda: inclose proximity to: the ebase plate I Ho ever, an--offset. -portion 250i; transve e; rm extends 1 inwardly and; the end portionflfif s disposed ;in generallyparallel but -;,sub s,tantiall-y-,-, spaced, relation to the these plate H a acoom:

TheendJBf of transverse detent arm;;26.: -aetjs 30..

as a lock, hold-out portion as will appear later and it extends through 'and is guided; by an elongated; slot 3| in the side fiange l;3-(see Fig fires 2} 4, t Aether-defiant m mberiwD s; moved between its 13$Qhah01di11' POSifiQH seen in Figure Zandits latch ss greleased and loeking positions -seen :in Figure 5- and 7,; respectively? the end 26 moves jintheslo 3|; y

Inorder tolock-the adetentgD la toh iholdingw position (Figure 2), andrthus preyent;un1ateh -40 ing 1 and openingz of: the door C, a look 1-member generally indicated; at B is pivotallymounted on the side flange 13 by a suitable,pin- 3 2', The; upwardly extending portioni 33 ofl-ookif member B has a detentrestrainingprojeetion; i-which, u when the lock member- 1B in lookedrposition 9- as seen in Figures; 3 yand is v disposed across the slotf3lbelowthe loweredgeof end 2-6 of i. detent a1 m, 26;. It will be obsered that when; in thisposition the dQiZBIlU D cannot be i moved inv unlateh-ingdirection suiffieiently-toperm-i paw1l23 to clear teeth [8 ;-to re1e2 is ,thejagteh -t member L for ,doo -pene n mpyement When the detent. member 13 is inflate};- dholdingy p i o (Fi res; end he-il e m mbe ma e-m ed at w ll:=.in a ids position.- The unloeked posit on 0f; look; er B c a e nii zF u e h socki nd; unlockin i qy ment meme. n c ed: by t lower portion- 31; of look membenB -or bythe, i key i n re e m chanism toi e Ll te i o e-f: scribed- R EB-tXWI d thrquehzthe garn h in 1 of" the .de n: We n wn;mann n h 5; I i 7 i s. lq e i- D S I IM fu11 1ines in Figure the loek imember Be 1 lockediposition an A hen- ;the;knob 35;;is lifted- -fi s p ro t onsseeniint a in-"Figure 2L he-ecp mne yme pwa d o e ment of rod I 36;, will move lock membenzfi f o the loc ed o s-1 10x 1 Fieu esal 3 an A in o it d' ke r o itienefi 6 bwncl od tha thelime. a n o r s ins e eilwkenere ne nansw ncbel eedor example he l-loq sqrm mbeis as; w liibe 1813;31:20:

This flange serves to stiffenthe detent 25,;

i tiennmayibe effected byi proper turmngipf -me key};

6. L;camberconnected-ate;vbe; operatedafiionn a: i; o eot er h n-ion th arnishamoldineeon by b fi e fiment h a s al emote contr h. handle.

A snanv rii eatfl a e-. ;enc1.; 8-:fi d: to i the :side flange; 13 pt the frame, strueture and; its; other? movable: ;,end 387 connected gto 1 they; lower-1.portion 31 ofv look; memben ,B. As the,

n un c in ;dir cti n"iclo kwiseca s eniina i re 6') w e r nn n ocked -position e. action; of the spring;- 33 changes ,or snaps 10% when; the-iamrovable end- 38""- "thereof, crosses the ;.=c omc n e e;v li wn ;,:betw.een en er: 1 e piyot 51in; 32 andi the fixed endi 38. of springsflgq As will be, again referred to later, this snapaflven tio r c ur a .me e erminempoint before the outer ;corner ;of; detent restraining :po itiio 1; 34,; of look :member ;B; ae edtwh n "mov ng, :.v in locking directiom, its intermediate 5,01 preset-= position seeniinFigure 8. ThllS,"WhQI1 1001; mm beraB is in its intermediate -or -preset .-position theqfunction-ot-which will be later described-h; spting 3 8 urges, it inlocking -direotion,-.

In Figure 4' the upper andlower ends' of Jock memberLB, and the snap-over spring; 38,- rare shown in phantom line 1 in; an -;interm ediate. poi: sition, during movementofllcokmemben B as by; operation of knob, :35, from looked; tor, n qckedg; position. ,In the phantom positions the comes; of; i-detent ,,-restraining ;;pertion 14 oi -upper; end;- 331 01" lock member 12vhas;mwed;away tromg; ke -1 po i o ufl cient y i so t t-the corren sponding clockwisermovement of the 1ower-,end; port on; 33:=.0 e lmemh r has mov d; the tr end 38" of snap-over spring 38 across the ,CQIl'l-gr. mon centerlinesof pivot pin '32 zand--fi-xedr,end 3 o sp n 8- 5 8 1 5 phantomm sitionr: in Figure e-spring 38 -is 4;urging the lock i-memb a. B clockwise; or unlocked direction; ands-W111- continue;.to move-the lock memberL B unti v reachesits final unlocked position; as seen; Figure ,6. As will :be explained later movement of lock remember B from its locked (f-ulli linen: position, ofiifig-ure 4'into the intermediateixphane; term line); position of Figure 51 may: be effected-, by the upper endofwthe remote controLbelhcranh-r} upon-operation thereof to: release; the latch.

latch holding position. The; same locking sand unlocking movement: of i member :B may also: beg effected, when the detent. D is ir 1: 1atch. holding; c 1 position, by means ,of the outside :key actuated; mechanism generally indicated at K-.in ,Figure-1 This;key-controlled lock operating means is; substantially: identiezil with that, disclosed claimed in the copending ,United :States,patent;,; application-of Edwin L.;A11en, Serial, No; 76,02 3gm filed February 12, 1949,1211C1YW111 be only briefly;-

described -;here;: A cylinder :lock 39:,;0fsuitable.

type is adaptedto be operated bya keyhdilqandir the -connect ne; sh f 14 I: op rates the: rotatable? finger; 42;r' (Figure 4:} whichyissupported by the, sideyfiange i3 and-operates within-a ygenerall-y C-shaped. recess 43 in the lower portion '31 of lock-member ,B; Asseen in Figureszeand .6 ctithe drawings-the fin er 42 'iscina mid-ornen-trai pesition; Rotation of finger- 62; throu h: a hamlet-en mined are in either direction from itsimidfpos 40. Cylinder lock 39 is of the type wherein the key cannot be removed except when the lock is in its neutral or mid-position and thus finger 42 must always be returned to mid-position to permit the operator to remove the key. This arrangement permits lock member B to be moved into and out of locked position, when the latch member is held in door fully latched and locked position (Figures 3 and 4) by detent D, either by the inside knob 35 or the outside key mechanism K regardless of the position the lock member B may be in.

In order to stop or block movement of lock member B, when in its unlocked position of Figure 6, against movement in looking direction sufficient to cause snap-over spring 38 to change its action and urge lock member B in looking direction, I provide an inwardly bent lug or tang portion 33 at the top of the upper end portion 33 of lock member B. A coacting lock stop portion 28" projects from the transversely extending arm 25 of detent D. As seen in Figures 5 and 6 the lock stop portion 26" of detent D is disposed in the path of movement of tang 33, the detent D being in latch released position. The phantom lines on Figure 6 indicate that if an attempt is made to move lock member B in looking direction, when the latch is unlatched and detent D is in latch released position, lock member B can only be moved a short distance until tang 33' engages lock stop member 26" as shown by the phantom lines. As spring 38 in this position is still urging lock member B in unlocking direction it will return lock member B to full unlocked position upon release of pressure on knob 35 or key 48. when the door is unlatched and open the lock member B cannot be moved into the preset posi tion of Figure 8 by either the knob 35 or the key 40.

The operation of the above described mechanism to eiTect locking of the door by suitable distinctive manipulation of the outside operating means (push button 2) will now be described.

Assuming that the door is open and the parts are in their normal unlatched positions of Figures 5 and 6, the push button 2 being in its normal non-operating position as seen in Figure 2, when the operator pushes inwardly sufiiciently to move push button 2 beyond its normal latch releasing position the detent D will be moved in counterclockwise direction beyond its latch released position of Figures 5 and 6 into its locking position of Figures '7 and 8. During this locking movement of detent D the stop portion 27 will enter the relieved portion or recess 20 and the end portion 26 (the lower edge of which may be referred to as the lock operating portion of the detent) will move downwardly in guide slot 3| until it has direct engagement with the operating edge face 44 of lock member B. As seen in Figure 6, this edge face 44 extends across slot 3i, when lock member B is in unlocked position, and is disposed in the path of movement of the lock operating portion of detent D from latch released position (Figure 6) to locking position (Figure 8). The downward movement of the lock operating portion (the bottom edge of end 26 of detent D) from its latch released position seen in Figures 5 and 6 into the locking position seen in Figures '7 and 8 will, through engagement with edge face 44, move lock member B in looking (counterclockwise as seen in Figure 6) direction sufficient- 1y to cause the free end 38 of snap-over spring 38 to cross the common center line between pivot pin 32 and fixed end 33 of spring 33. When this cross-over occurs the action of the spring 38 is Thus,

reversed and it then urges lock member B in counterclockwise or looking direction and will move it into the preset position seen in Figure 8. When in this preset position lock member B is held against further movement in locking direction by engagement with the side face of the end portion 25 of detent D, which may conveniently be termed the lock hold-out portion of detent D as it serves to hold the lock member out of locked position and maintain it in preset position until the operator closes the door. Upon full closing and latching oi the door the detent D will move into its latch holding position seen in Figure 3 in which the lock hold-out portion 26 has been moved upwardly in slot 3! to clear the corner of detent restraining portion 34 of lock member B and permit the lock member to move on into locked position as seen in Figure 4. When this occurs the door is automatically looked and cannot be unlocked from outside except by use of the key at. Lock member B cannot move beyond the locked position of Figure 4 because of engagement of the upper end 33 thereof with the lock stop portion 25 of detent D.

It will be clear from the above description that when the door is open and unlatched the lock member B cannot be preset or locked by means of the inside knob 35 or the outside key 45. However, it can be preset by a suitable distinctive manipulation of the outside operating member (push button 2) from its normal non-operating position beyond its latch releasing position into a locking position in which it moves the detent D into the locking position seen in Figure 7. When the operator releases the outside operating memher after this manipulation the lock member B has been moved into its preset position of Figure 8 and the detent D will return to its normal latch released position of Figure 5. It should be noted at this point that when the lock member B is unlocked and the detent D is in latch released position. the lug or tang 33 on lock. member B is disposed between the lock stop member 25 and the base plate i2 (as clearly seen in Figure 6) but that, after the above described lock prese ting operation has been completed, the lock stop member 26" of detent D will be disposed between the tang 33 and base plate I 2 (see Figure 8). During movement of lock member B from the unlocked position of Figure 6 into the preset position of Figure 8 the lock stop portion 25" of detent D is withdrawn out of the path of movement of tang 33', the clearance between these parts in this situation being indicated at 45 in Figure '7.

When the operator releases the pressure on the outside operating means 2 and then closes the door, the latch mechanism being in the preset position shown in Figure 8, the pawl 23 of detent D will first drop into its secondary latched position in notch 19' on latch plate M. If the door is not pushed shut with sufiicient force for full latching the pawl 23 will stop in notch [9 in engagement with secondary latch tooth l9 and the latch member L, and the door, will be held in secondary latched position. However, such movement of detent D into its secondary latched position will not lift the lock hold-out portion 26 thereof far enough above its normal latch released position, seen in Figures 5 and 6, to permit the detent restraining portion 34 of lock member B to move into locked position beneath end portion 26'. Thus the mechanism will not become automatically locked in secondary latched position. Olf course, as described above, when the door reaches full latched position of Figure 3, the end portion 26 will move up to the latched asseus 9 I l' position of Figures 3'- and 4; aboveithe 'l'detent'i f restraining portion 34 of lock memberiB, permit ting the snap-oven spring'38 to move the locki-i member-B into locked position: (Fig-uremInn' the United States Patent No. 2A80 688-0f Edwin-v5 L. Allen there is described and claimed automatic lock mechanism by whichi automatie' lock ing 1 may =be "effected upon closing thedoorfi and 1 1 reference is made theretoi i,

When" thewdooris closed a'nd latched -andit i is desired lto open -samefromf outsid.e,= the" oper ator wp'ushes on the outsidebactuatihg inember. (push button-2) to movethe detent D from-ite latch holding'eposition of Figure sZ inte its"latch= released: position (seen in phantom: :lines in Fig urea3) in which1thepawlw23 clears the'itootlrlfl. In order-mo prevent the operator from iinadvert entlyi :movingthe detent': D on into its I lockxp're settingfipo'sition, and-thusffpresettingv the lock mechanism when he'desiresmerelyrto open thedoor; withfconsequentpossible iaoeidental z'lock ing'iof the vehicle .with-.=the keys inside; provide the-blocleirig element i2ll' on"theulatclti'plate M and. vthe coactinga.stopnportion-EZT 'on theidetent D. dlhis blocking elementias illustratedfsconsistsa Y of a; portion of the slatch. plate 5M formed. onaar "3 radius fromvthegceriterflof rotation thereof and: extending. from a: point adjacent the 'secondar tooth l-9'totheirelievedportion'ill" As is clearl ,v i seen in FiguI1e:'3, whensthe dete'n is movedcg' from its full line latch holding position: intor: its-rphantom-r linefi'i latchrareleased?position it is blockedsfromkfurtherf movement; toward ipreset tingfposition by engagementiv-of the-'stopzportionx t. 21 of -the:detent-;With,.the/edgeziace of blocking elementdil ":5: In :no'rmal: operation cf 1 the iapparatus; as soonvas "the pawlv-23 clears-theitoot H3 the -,latch1:plate;M andilatch member L start to rotate; tin u ching; direction 1 (clockwise fas seen-in: Figure-,3)? However-pas thee-blocking ele' ment- EZW eXtends circumferentially of 'theflatch: plate M a substantial distanceias seenzin Figure the operator, ,even*th0.ugh;:he continue-to exert force on -the;outside a;ctuating, memberxi-momene tarily qafterthe latch member: startssits: unlatch ins: mOW/fGmBTI ErhG still cannot move-the detent D into its lock "presetting; :position: vcbecaus'e'. the blocking-action of element r -2- 0"; onthe dete'nt continues-until the latchvplate M andi-latcl'r-mem' ber L substantially;reachetheiriunlatchedapos time t of Figure 5. When this occurs-:sthejidoorf is open andthe operator has'ireleasedw theoutside actuating. member. ,If hen'ow desire's to preset the.--,mechanism for automaticdocking he can-"dose so, a as previouslybeen describedsbecause the detentD' -can---,freely=-mo,ve"into preset/ting, pos tion by virtue ofthe relievedor cut 'awayzportion; ZU'Qr-of the'latchplateM. -.-;This-featurer:of my apparatus is effective in preventing accidental 1:. presetting of the lock' due :to inadvertent excess -6 movement of the outside operating member uwherigrv it is desiredmerel-y to ;unlatch:and::.0penithe door. Although the:blockingielementztis illu tratedsas iormingva; part of the-latch platei M it will be understood-thatotherblocking:means for 1holdingethe lock presettingamember: out-ref presetting position exceptewhenzthevlatch'ais subq: stantiallr in "$1 1rfl l mpsition; might -:be 7' employed It should also :be noted; thatsthc form of theblocking element-Zll'Y-is such that-if the latchplate and detent D- arecin theirv secondary latched pasitimisl:zthe rblocking. yelementm-fl stvill 111 be in position-to; engage and' block ithe"stop'mem-' beri 2 l of detentrDiagainst-movement into pr setting positionsMThuswhen the door is in its '5 secondary atched position, as wellas when' in fulllatched position; a positive stop-is provided agai-n'sti 'inadvertent presetting'of the lock due to excessive movement of *the outsideoperating member-N Figures 4 and 6 illustrate how the latch spring l6 extends thl'oug'h -a rectangular hole 46in lock membenB to permit-the necessary movemerit P of the -lock r'ne'mher without interference from-spring 5.-

In addition'tomeans for operating the latch mechanism from-outsidethe door it is of course necessary to-proyi'de me'chanism for releasing thelatol'i- -from' ins'ide the" doc'ir; -Such a mechanism is illustratedas incorporated in the apparatus show'nin Figures l to ificlhsiVeQbut need not i be describedin 'detail here as it forms-ho part of the presentinvntibnand is fullydesoribed in the said@co-pending UnitedStates patent applicatibh' of Leonard J 'W'aYgflel", 5 Serial N02 98,00 1

111665311116 9} 19491 It ti ill'suffice for puiposesof the-"pi'esent--disclosure-to point out that the inside remote controline'chanism includes a bell crankmeinberRf pivotally mounted on side flange i3 by'a pin 419 'This bell c'ra'nk is operated by a strap or other means extending to the usual inside operating push' b'uttonor "handle. This remote control mechanism is so arranged that it cannot be 'operat'ed to effect presetting -of the 'lock' "mechanismion automatic locking of the door. It is also arranedfso thaltyif the door is closed and lockedfoperation-of the inside remote *contr'ol means will first unlock and then unlatoh the door? The operator can only 'preset the lcc'k' mecha-* nism,- for automatie ioeki-ng upon *closing the door-fWhen- 'th lateh membenh is substantially in its'unlatched-positiom Hecannot, due to the blocking action or the blo'cking element 23'; preset the lock mechanism -when the latch mechanism is in latch 'er secondary'latohed positions.

The combination of rheans for presetting the lock for automatic lockihg bya distiniztivemanip-hlatiori-io'f the butsieebperaang means with means for preventing loclfingmovement; of the outside operating r'riea' ns-exc'ept when the latch is in unlatche'd posi'tion" provides a most convenient, ef-

my *imp'r'oved' outside operating member blockof ifi'ngelo' R". deVit ESeria-I NQ.39,540; filedApril 25, 'ieeaandcros referenceismade thereto;

Theframe"structure-includes a. base plate. 5!]

and a' sideflanlfeiilx- -*Latch*member L is supported -on a shaft-52 t'vhich-also, carries the latch iatemember ea. Latch "spring 5!! n'rges, shaft 52,-latch' me'r'nbr L, and latchyplate. 53 in uniatching iolockwis as seen'in Figure 9) direc- In order to h'old theflatch L in latched position: adetent member D i is pivotally mounted on a suitable-pin 55 carried-by base plate 53. Detent' member D inc lude's adownwardly extending arm'portionififi and atTansVerselyextending arm portionfi'l. liTheinwardlyprojecting detent flange 58 isI-engage'd at its lower end-by "suitable-outside operating means, such as a push button of the type illustrated in Figure 2, and also acts as an abutment for the lower end 59' of detent spring 59. The upper end 59 of spring 58 is anchored by a lug 69 struck out from base plate 58 and the spring urges detent D' in latch holding direction (counterclockwise as seen in Figure 9).

When in latched position (Figure 9) the latch holding portion 6| of detent D is disposed in abutting latch holding engagement with main or full latch stop portion 62 of latch plate 53. To release the latch and permit opening of the door, detent D is rotated in latch releasing direction (clockwise as seen in Figure 9) to lift the transverse arm 51 sufiiciently to move latch holding portion 6| out of engagement with the stop portion 52 of latch plate 53. This permits the latch plate 53 and latch member L to rotate in unlatching direction (clockwise as seen in Figures 9 and 11) into unlatched position as seen in Figure 11 with the stop lug 63 of latch plate 53 abutting the latch holding portion 6| of detent D and blocked against further movement in unlatching direction thereby. A secondary latch stop portion 64 is preferably also provided on the latch plate 53.

This particular arrangement of latch plate and detent is advantageous in installations where it is desired to have the outside operating push button or handle disposed substantially at the horizontal level of the latch member L while the embodiment illustrated in Figures 1 to 8 inclusive is particularly useful in installations where the outside operating member is to be positioned substantially above the latch member.

The transverse arm 51 of detent D has an offset portion 55, generally similar to oliset portion 25 in Figures 1 to 8, and an outer end portion 66 which extends through and is guided by a slot 61 in the side flange of the frame structure and which serves to block the lock member B in preset position and also to actuate the lock actuating member A as will later appear.

In Figures 9 to 14 the lock member B is pivotally supported by a pin 68 carried by side flange 4 5| and has an upwardly extending arm portion 69 and a lower portion 19. A lower shoulder H and an upper detent restraining shoulder 12 are formed on the upper arm 69 and the operating flange I3 is bent outwardly from upper arm portion 69 between shoulders TI and 72 and projects out beyond side flange 5| through a cut-out or slot 14 therein. This cut-out or slot 14 joins the lower end of slot 61. In order to give the desired action to lock member B a snap-over spring 15 has one end 15 anchored to the side flange 5| and the other movable end 15 connected to the lower portion '15 of lock member B. When in latched and locked position, seen in Figures 9 and 10, spring 15 urges lock member B in looking direction (counterclockwise in Figure and holds it in locked position. When lock member B is in unlocked position, as seen in Figure 14, spring urges lock member B in unlocking direction (clockwise as seen in Figure 14) and holds it in unlocked position. If the lock member B is moved only into its preset or blocked positions (seen in Figure 12) by means of the rod 36 and the inside knob 35, the detent member being in secondary latched position or in latch released position, the spring 15 will be still effective to urge member B in unlocking direction (clockwise as seen in Figure 12) and will return lock member B to its unlocked position (as seen in Figure 14) when pressure on knob is released.

12 Thus the lock cannot be preset by use of the inside lock operating knob 35. It can, however, be moved into and out of full locked position by the inside knob 35 and rod 36 when the latch member is latched and the detent D is in latch holding position as seen in Figures 9 and 10.

In order to effect presetting of the lock mechanism by means of a suitable distinctive manipulation of the outside operating member I provide a lock actuating member A which is pivotally supported on the outer face of side flange 5| by a pivot pin 16. A look actuating member snapover spring 11 has one end 11 anchored to the side flange 5| and its other movable end 11 secured to the upper end portion 18 of lock actuating member A. This snap-over spring 11 is so arranged relative to the pivot 16 of lock actuating member A that, when the lock actuating member is in its idle or retracted position as seen in Figure 10, it urges the lock actuating member in counterclockwise direction (Figure 10) and holds the upper end portion 18 thereof against a bent out tang on side flange 5|. At a point in the movement of lock actuating member A from the idle position of Figure 10 into the preset position of Figure 12 the free end 71 croses the common center line of pivot 16 and fixed end 1'! and thereupon the spring I! reverses its action and urges lock actuating member A in clockwise direction (Figure 12) toward its preset and its locked positions.

As is clearly seen in Figures 9, 10 and 14, the edge face of lower end 19 of lock actuating member A is disposed to engage the outwardly projecting operating flange 13 on lock member B. In order to efiect the desired operation of lock actuating member A by the end portion 66 of detent D, a shoulder 8! is formed on the upper end portion 13 of lock actuating member A and this shoulder extends across the slot 61 when actuating member A is in its retracted or idle position (see Figure 12). A hole 82 in look member B permits the end of latch spring 54 to extend therethrough without interfering with the required movement of member B, and the outside key lock operated finger 42 cooperates with a generally 0 shaped cutout 83 in the lower end portion 10 of lock member B to effect locking and unlocking from outside the vehicle by means of a key in the manner previously described.

When the door control mechanism is in door closed and latched position the latch member L, latch plate 53, and detent D are disposed as shown in full lines in Figure 9. Assuming that the mechanism is unlocked, if the operator desires to release the latch for door opening he operates the outside actuating member (such as push button 2) to move the detent D from its latch holding position (seen in full lines in Figure 9) into its latch released position (partially indicated in phantom lines in Figure 9) in which the latch holding portion 6| of detent D clears the latch stop portion 62 of latch plate 53. This permits latch member L and latch plate 53 to rotate into unlatched position as seen in Figure 11. A blocking element 53 forms a part of latch plate 53 and coacts with the stop portion 56 on the lower arm 56 of detent D. Between the blocking element 53 and the latch stop portion 62 of latch plate 53 is a relieved or cut away portion 53". As is clearly seen in Figure 9, when detent D is moved from its full line latch holding position into its phantom line latch released position it is blocked from further movement toward lock presetting position by engagement of the stop iQiBBBgEEBO lleaseitherzlatcha';.-:Eurthermore;leven though he w.

continue tmexert" excessivepressure: on the out- :sideoperating member after: the latch member L -"has :been: released-and hasustarted to rotate .in nnlatchingdirection; he :still cannot move detent D"into:lockpresetting position becau'se the block- :ing.:-action ofrelementfitf on the: detent D contin-ues untili' the latchplate 53sandr1atchrmember L substantially reach their unlatched' positions of: Figure 11. Byrthe time this-occurs the operator hasq 'eleased'ttheoutside actuating' member :andthe :door opens. I If he now desires to preset Y the-mechanism for automatic locking hecan do :so because the detent Dyand particularly therstop portion =56othereof;octanrfreely move into l'lock presetting, position by virtue of" the arelieveol or rout awayvj ixportion" 53- szwhich; is 'now "disposed in the path"of'movementzofrdetent stop" portion 56 -zts'ee Figure 11 l i As in ;'the: embodiment 1 illustratedcxin Figures 1 'to 8 'l'i'nclusive; :tlris-meanstfort preventing: presetting 'ofsthe .lock: mechanism, :by: actuation of the i outs'ide actuating: means; when? the latch -member 1810111, ofcunlatched position prevents accidentalalocking of=ther door 'whenit'isdesired merely tonunlatcheand openrsame; In Figure 1 3 the detent B dsaseen .irriitsT-secon'dary latched position in full 1. lines' andin latchireleased posi- -:tion innphantomlines. -It' will be'observed-that the blockingwelement .53;'-,":Zby engagement with the stopvportionrifi'mfi detent D3, effectively pre ivents-flock:.presetting:during release "of the latch member from secondary latched -;position and .thus, regardlessofi=whetlierrthedoor isin its full elatchedpositionsor;imits-secondary latched position -effective meanszs'are providedifor preventing inadvertent presetting ":ofithe lock due to exces- -sive movement oft-the outside operating-member.

In the apparatus :ofFigures 9to 14 inclusive, there :isincluded means for 'ioperating the latch mechanism from tinsi'devthe' door. The elements .and mode of operationtof: the. inside "remote control-fmechanism will that be described here in detail :astheydo'notnform apart of'the present invention and-are fullyi'describedin the co pendinga-United States patentifapplication of Angelo Rt =deVito, :Seria=l:No. 39,540, filed April '25,- 1949, to which'-.crossereferencefhas been made. For :present purposes itiwill tbe'sufiicient to point out :that fthe wrexn'oteucontrol :mechanism "includes a loell crank mernberaBdfpivotallymounted on the side flange 5| at 85 and connected to a suitable handle orztheelike':(noti shown las by a strap 36 {Figure-"14in .As the-previously described embodiment .nf this'iinven'tion, the remote-control e-mechanisrmistso arrang'ed that itcannot be operfmzillnnanipulate the outsidefzmen'iberttwmove it against; theresistanceizimposeditSl'DWIL' spring means (as for example spring 5 in Figure- 3:) 'Fand ithe detentesprin g :BBiuntiB-theI detent Dareaches .1 latch-released positiom-(F'igure 14.)c:=.:I-Ie:will:con-

:xti'nue ato: move=the1 outsideooperatingsmember on f .bey-ondrits latchtreleasihgz.position'xtor itsalocking -positionzandeltiwill be:noted;thatethiszcontinued Jmovement is' permittedobeoause stop: portion' ifi' or: detent Dican'f entercrelievedr portiorr-fi it! :of latch: plate 53; @During: thisrs' furthem movement I an fadditionaliiresistance begimposed: which man he felt ycthezloperaton it Thisrradded vresistmice is due-to the :endrporti'on 66' of detentxD engagingshonlderfil. rlocki actuating member A and starting Y to move wit aigainstithe' forc 0f snap-oVeF'spr-ing l I. :rBefore: thei outside-actuati'ing member :A andadetent D's. reachttheiromaxi- :rmum lock: presettingspo'sitions. :seen innFligure: I2 snapmvers'prma 'lilrlwill'reverse its actiontarfdz the added resistance to; movement or the; outside a 'ctuating memberrmll :loeremoved. l When: the slockvactuatingmember :Atis moved from its fidlepositiomon Flig ure 21x1 toward itsrloiik :preset position of: rigure- =il'2ithe edge Btlhfethe lower: :end 192 thereoraengagesitne: outwardly projecting operating ifiang'e '4'!fi-ionrelockizniember B' and moves. iiock =member B fir-om itssunlocked position of Figure 141m: locking idirection. snap-over spring 1T reverses its; faction, as --described: above the: lock actuating memh'ern will move under'the. infiuenceuof spring 11 into: the preset position ofl'x Ei-gure i2. andi carry with" it lock:.member Bf. The lock :a'ctuating member usnapi-overspring 17H iisxof such strength, andthe parts-i are so ;proportioned.aandrnrranged; that Spring ll :wilIt-hold vthei loclesmem'lczer BY" infpreset positioneven thoughsthea snapenver'rispring fl S is stilliur ging lock member "B! i inisunlo'cking xii-rec- -tion andtwill positivelwmove Titi 'ominto locked position rwhenr'therslockllroldout portion 66 "of -detent D iswithdrawn. "When the --door is .ful'lyuclose'd and? (latent D "moves 'into its full: latched position of Figure 9 loo-k member B Will be moved 'on into its full ated towefiectzpnesetting of-the lockmechanisrn for wutomati-clocking ofthedoor-and, as illus- "trated, i'further :50: arranged that, if the door :is-iclosedzandfarl ockedg "operation of the inside xremotezcontrolwmeans will' first unlock and then unlatch thetadoor.

.-Assuming that thedoor is open, the latch mechanism.istunlatched, and the operator'desires that "the. door be: locked' when'he swingsit into tfullyxclosedsandslatched -*position, the necessary manipulation s'and operation ofthe mechanisms of Figures '79 :to 14 will'novv be described; With the door? open the-"outside opera ting member, :such'asrpush cbutton 2 0i Figure 2; will be in its normal::noneoperating position. The -"operator locked position oft-Figure :1orhecauseiortne action -:of spring 11 and becausei the 'lock hold -outpor- "tion .56 or detent D has vbeen; moved out of-lock hold-out position in" which fit bloclis the upper end of lock member'B? out of locked position. :Thus with %the apparatus ofi-Fi'gures'e'to 14 inclusive, as-with. the' embodiment i illustrated in Figures I to 8-inclusive, the ope'ratormay effect automatic flocking of: the door 'without use of the key by :a" 'distinctiveimanipulation of" the outside -operati-ng memberxfolloived by=closingof the door. Due to my: automatie' 'blooki'ng mechanism the outsideoperatingimember cannot he manipulated to preset; the-lock for f automatic locking' except "whenithelatchi :izsubstantially in its unlatched positioncandtzthusxinadvertent presetting of the :lock-fduring': normallunlatching 'ofmefloor'is' prevented. :nlthouglrzlrthavef described the illu-strated embodiments s'of 'nryirinvention in"considerable' detail :it will bezunderstood by those skilled 'in-the art "that variations and mndificationsmay be made innthetformiand in 'therarrangement er the baits which. achieve my aimproved resultswithout departing from. theepirit of" my "invention. It -will also beunderstood that my'improved'lockpontrol means may be incorporated in types of latch'i units 'difierent irom "those l-hereint-illustrated and accordingly" I do .not vwish to .berlimitedtothespecific mechanisms hereinshown andldeseribed-rbut claim as my invention all embodiments thereof coming within the scope of the appended claims.

I claim:

1. Door control mechanism including a latch member having door latched and door unlatched positions, an outside operating member supported for movement in one direction from a normal non-operating position to a latch releasing position to a lock operating position in that order, lock means for preventing unlatching of said latch member, means, operable by movement of said outside operating member from said latch releasing position to said lock operating position, for moving said lock means in looking directon, and an operating member blocking element movable with said latch member and having blocking and non-blocking positions, said operating member blocking element being disposed to block movement of said outside operating member from latch releasing position to lock operating position when said latch member is in latched position, and said blocking element having movement with said latch member during movement thereof from door latched to door unlatched position whereby said blocking element reaches its said non-blocking position when said latch member substantially reaches unlatched position.

2. Door control mechanism including latch means for holding a door in closed position, means, including an outside operating member, for actuating said latch means to permit opening of said door, lock means adapted when in locked position to prevent actuation of said latch means by said outside operating member to permit opening of said door, means operable by movement of said outside operating member for moving said lock means toward said locked position, and an operating member blocking element movable with said latch means between a blocking position and a free position, said blocking element being in said blocking position when said latch means is in door closed position and being disposed to block such movement of said outside operating member as would effect said movement of said lock means toward locked position, and

said blocking element being in said free position locked position, means for presetting said lock member for automatic movement thereof from said preset position into locked position upon the latch member reaching said latched position after said lock member has been placed in said preset position, means for holding said lock member in preset position when said latch member is out of said latched position, means for moving said lock member from its preset position into locked position, said presetting means including an outside operating member supported for movement between a normal non-operating position, a latch releasing position, and a lock presetting position, means operable by said outside operating member for presetting said lock member upon movement of said outside operating member from said latch releasing position to said lock presetting position, and a blocking element, movable with said latch member, for blocking said outside operating member against movement from said latch releasing position to said lock presetting position when said latch member is in door latched position.

4. Door control mechanism including a latch member supported for movement between full latched, secondary latched and unlatched positions and adapted when in full latched position to coact with a keeper member to hold a door in full closed position, a lock member supported for movement between locked, preset, and unlocked positions, means, including an outside operating member, for eifecting release of said latch member from said full or secondary latched positions, said outside operating member being movable in one direction from a normal ncn-operating position through a latch releasing position into a lock presetting position, means, operable by movement of said outside operating member from said latch releasing position to said lock presetting position, for moving said lock member from unlocked position to preset position, means for stopping movement of said lock member in looking direction beyond said preset position when said latch member is out of said full latched position and permitting such movement of said lock member when said latch member is in said full latched position, spring means for holding said lock member in said preset position and moving same from said, preset position into said locked position upon said latch member reaching said full latched position, and a blocking element, movable with said latch member, for blocking said outside operating member against movement from said latch releasing position to said lock presetting position when said latch member is in said secondary latched position or said full latched position.

5. Door control mechanism including a latch member, an outside operating member supported for movement between a normal non-operating position, a latch releasing position, and a locking position, lock means for preventing unlatching of said latch member, means, operable by movement of said outside operating member from said latch releasing position to said locking position, for moving said lock means in locking direction, means for imposing additional resistance to movement of said outside operating member during at least a portion of its said movement from latch releasing position to locking position, and a blocking element movable with said latch member, said blocking element being disposed to block said outside operating member against movement from said latch releasing position to said locking position when said latch element is out of unlatched position.

6. Door control mechanism including a movable latch member, a latch plate supported for movement with said latch member and having a blocking element portion and a relieved portion adjacent thereto, a detent member supported for movement between latch holding, latch released, and locking position, said detent member having a stop portion positioned to engage said blocking element portion of said latch plate if said detent member is moved from said latch holding position beyond said latch released position when said latch member is in latched position and during unlatching movement thereof until said latch member substantially reaches unlatched position whereby movement of said detent from latch released to locking position is prevented, said relieved portion of said latch plate being disposed, when said latch member reaches unlatched position, to permit movement of said detent from said latch released to said locking position, a lock member supported for movement between locked and unlocked positions and adapted when in locked position to prevent unlatching of said latch member, means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked position and in looking direction during a final part of its said movement between unlocked and locked positions, said detent member having a lock operating portion adapted to move said lock member in looking direction, if said lock member is in unlocked position, during at least a part of the movement of said detent from latch released position to locking position, and lock hold-out means movable with said detent and adapted to block said lock member in said final part of its movement from unlocked to locked position when said detent is out of its said latch holding position.

7. Door control mechanism including a movable latch member having latched and unlatched positions, a blocking element having a relieved portion adjacent thereto and supported for movement with said latch member, a detent member supported for movement between latch holding, latch released, and locking positions, said detent member having a stop portion positioned to engage said blocking element if said detent member is moved beyond said latch released position toward said locking position when said latch member is in latched position and during unlatching movement thereof until said latch member substantially reaches unlatched position whereby movement of said detent from latch released to locking position is prevented, said relieved portion being disposed, when said latch member reaches unlatched position, to permit movement of said detent from said latch released position to said locking position, a lock member supported for movement between door locked and door unlocked positions, means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked position and in looking direction during a final part of its said movement between unlocked and locked positions, said detent member having a lock operating portion adapted to engage and move said lock member beyond said initial part of its movement when said detent member is moved from said latch released position to said locking position, and lock hold-out means adapted to block said lock member in said final part of its movement from unlocked to locked position when said latch member is out of its said latched position.

8. In a door control mechanism having a latch member movable between door latched and door unlatched positions, a lock member movable between unlocked and locked positions, and an outside operating member movable from a nonoperating position to a latch releasing position to a locking position in that order, the combination with said outside operating member of a blocking element movable with said latch member and disposed to block movement of said outside operating member from said latch releasing position to said locking position when said latch member is out of said door unlatched position.

9. Door control mechanism including a latch member supported for movement between a door latched position and a door unlatched position, an outside latch operating member supported for movement in latch releasing direction from a normal non-operating position to a latch releasing position and beyond, lock means for preventing movement of said latch member from door latched to door unlatched position and having unlocked, preset, and locked positions, means for holding said lock member out of locked position when in said preset position, means, operable only by movement of said outside operating member in latch releasing direction from said normal non-operating position to a point beyond said latch releasing position, for moving said lock means in looking direction into said preset position, spring means for moving said lock member into locked position from said preset position, and an operating member blocking element supported for movement with said latch member, saidoperating member blocking element being positioned, when said latch member is in said latched position, to block said outside operating member against such movement in latch releasing direction beyond said latch releasing position as would effect movement of said locking member into said preset position, said operating member blocking element also being positioned, when said latch member is in said unlatched position, to permit sucl movement of said outside operating member.

10. Door control mechanism including a latch member supported for movement between door latched and door unlatched positions, a detent member supported for movement between a latch holding position, a latch released position, and a lock operating position, movement of said detent from said latch released position to said lock operating position being in the same direction as movement thereof from said latch holding position to said latch released position, a lock member supported for movement between locked and unlocked positions, means operable by movement of said detent member from said latch released position into said lock operating position for moving said lock member from said unlocked position toward said locked position, a detent member blocking element movable with said latch member, and cooperating means on said detent member for engaging said blocking element and blocking said detent member against movement from said latch released position into said lock operating position except when said latch member is substantially in said door unlatched position, said detent member blocking element being disposed out of the path of said cooperating portion of said detent member when said latch member is in said door unlatched position whereby said detent member may be moved from said latch released position into said lock operating position.

OITO V. PUZIK.

Name Date Allen Aug. 30, 1949 Number

Images