Патент USA US2411941код для вставки
Dec. 3, 1946. I R. F.‘ SMITH 2,411,941 DOOR LOCK Original Filed Sept. 15, 1944 5 Sheets-Sheet 1 Simentor @7522! Z‘$111275 Dec; 3, 1946. 2,411341 R. F. SMITH Book LOCK Original Filed Sept. ‘15, 1944 5 Sheeis-Sheet 3. 7 3110mm: ?alyezi $52133}: Ba ,W Y Dec. 3, 1946. 2,411,941 R. F. SMITH DOOR LOCK ' Original Fil‘ed Sept. 15, 1944 /Id ‘ 5 Sheets-Sheet 4 Dec. 3, 1946. R. F. SMITH ‘ 2,411,941 I DOOR LOCK 5 Sheets-Sheet 5 Original Filed Sept. 15, 1944 182 A93 7 , w. w .. , , 185 I.” a . M .H = ‘v 2 0/ 5“fig $2 nI/vllWu 3 6.l.1.‘ w ,__ __ L a ./ __ , a w. w u H 62Ma. y/ .__ 6v m j az.0 .J K :9\ 3 4 4 a a0 / __9 1a.,. . ‘ .Ez/‘VvzJ,.E zE ; 14‘. _i A96 0Tu ‘ Immentor Wok/z} $51,712» (5 g y attorney ‘ "2.411.941. ~ PATENT orrica . 2.411.941 In’oon LOOK Y ~ Robert F. Smith, Detroit, Mich, assignor to‘ Gen eral Motors Corporation, Detroi?lhiich, a cor I poration of Delaware. - _‘ - . Continuation'of application Serial No. 554,115, September 15, 1944. This applieation ‘January _4, 1945, Serial No. 571,275 9 Claims. ((1292-25) . ' 1 ' ‘ ‘ ‘This application is a continuation of my ap ' parts shown at the right of Figure 1. The dotted outline shows the position of the parts with the ' plication Serial Number 554,175, ?led September 15, 1944. r inside look knob depressed. . This invention relates vto locks or latching _ , Figure 8 is an enlarged detailed view of the structure shown at the left of Figure 1 but looking from the inside of the vehicle. mechanisms, particularly applicable to automo tive vehicle doors and rear deck lids. The object of the invention is to construct a‘ ‘Figure 9 is a- sectional detailed view of the lock' lock which is operable by a push button from the mechanism and the keeper on the door post taken inside of the vehicle and by a push button from through the. door pillar and the door post. . the outsideof the vehicle, the push button on the 10 . Figure 10 is a detailed view on the line "-10 outside of the vehicle having a key operated lock a of Figure 9. - barrel therein. A further object of the invention ‘ Figure 11 is a sectional detailed ?gure on the line l|--ll of Figure 7. is the elimination of‘the usual slidable latch bolt and the usual dovetail.v In place of the latch bolt Figure 11a is a. detailed view showing the inside Y there are substituted two throw-out latches which 16 locking mechanism in the locked position. engage with a stationary keeper‘ secured to the, Figure. 12 is a detailed view similar to Figure door post. This stationary keeper also acts as a 10 but ‘showing the throw-out latches in their dovetail and performs the usual functions there- . '- extreme released position. 7 of. A further object of the invention’ is the com Figure 13 is a detailed view partly‘ in section of bining oi’ the push button on the interior of the 20 the mechanism at the inside of the door for op vehicle’ with the window raising‘mechanism and erating the door latch and for raising and lower-v thereby eliminating one projecting element or ing the door window. . handle from the inside of the door. . . '_ Figure 14 is a view simllarto Figure 13 but Further objects of the invention relate to the showing the, push button in the depressed position. v ' speci?c details of the construction of the lock and latch mechanism. . . Figure 15 is a detailed view on'the line 15-15 of On the drawings: Figure 13. _ Figure 1 is a view of the-lock mechanismv ap-' plied to-the door and looking from the outside of the door, parts of the door being broken away to Figure illustrate 2 isthe a detailed construction. view of the I lock and latch mechanism attached .to the door pillar and look ing at the edge of the door from the inside, a part being broken away better to illustrate the construction. . r - - Figure 3 is a detailed view‘of the parts shown in .' An automotive vehicle (only-a part of which is shown) is indicated as a whole at 2. The vehi 30 cle has the usual door post 4 and the door 6. The door is provided with the usual window! and the usual window raising and lowering mechanism indicated as a whole at I 0. p - The window raising and lowering mechanism includes the mounting frame I! rigidly secured to the door and the segment I‘ pivoted at Hi to . the frame 12, The shaft I8 of the pivot has se cured thereto one end of a coil spring'20while; the upper part of Figure 2 but showing the push button depressed and the parts in position for '40' the other end is held at 22 to a part of the frame the release of the lock. The dotted outlines‘ show I2. The coil spring 20 alwaysvacts in a direction the position of the parts before the button is to raise the window 8. ' The segment I‘ has?~rig-' " idly secured thereto an army 24 .to the end'of depressed. _ ' ‘ . Figure 4 is a view similar to the upper part of Figure 2 but showing ‘the inner latching member depressed and the parts shifted to the latch de pressed position. The dotted outline shows the shell moved to its extreme inward position and being‘ out of engagement with the bell crank lever. Figure5 is a perspective view of the bell crank ' lever operated by' the push button and shell from ' ‘ the outside of the door. - ' " ' Figure 6 is a detailed perspective view of_ the ratchet and pawl mechanism associated with each which there is attached the mechanism. connected ‘ t to the window 8 to raise and lower it. A shaft 26 ' is journalled in the frame 12 and has mounted on the end thereof a small gear wheel 28 which‘ ‘meshes’ with the gear, segment 14. The other end’of the shaft 26 (see Fig. 13) is knurled and has rigidly mounted thereon the central part 3|! of a spider- 32 which forms the bottom of ahub 34 having a handle “secured thereto. By oper-g atin'gthe handle 36 and turning the hub 34 the shaft,” will berotated to operate-the gear seg of the throw-out latches. ment I4 and‘ to cause the operation of the'win- ’ Figure 7 is ‘an enlarged, detailed view of-the'os dow raising and lowering mechanism. 2,411,941 as; ' 4 d The door 6 has the metal pillar 38 at itskedge. and to the pillar 38v there is secured the lock and latch mechanism 40 of ‘the invention. The lock and latch mechanism comprises thev base plate 42 having a right angularly bent ?ange 45 which is secured to the inner part of the pillar 38. The pillar 38 and the plate 42 have mounted . and 96 an auxiliary plate I02 is positioned. This therein the shafts or studs 84 and 46 which ex plate has an edge ?ange I04 secured by means of the-‘screws I05 to the edge ?ange 45 of the plate 42. A retaining screw I08 passes through the'plate 42 and into the spring retainer or cover plates 42 and i=2 to, hold the plate in positic 1. The purpose of the plate I02 is to protect the springs 84 and 96 and retain them in their‘opera' tend through the edge face of the pillar 38 and tive position. 1 ' have secured thereto at the ends thereof the Each pawl 82 and 84 has along arm I I0 or'l I2, throw-out latches 48 and 50, best shown in de-_ the ends of which extend adjacent to each other tail in Figures 10 and 12. The studs 44 and 46 ' are generally rectangular in cross section and at H4. The plate 42 has an extending ?nger M6 to receive a pivot stud II8 to which there is piv pass through conformable openings in bushings oted a cam I20. The cam has mounted thereon a projecting stud I 22 into which there is screw threaded an operating rod I24. A set screw I26 secures the end of the rod in the stud I22. By vided with a head 53.- The members 5i are in pulling on the rod I24 the cam I20 will depress serted through openings in the plate 42 and pile the arms II 0 and H2 at the point .I I4 to cause lar 38 with the heads 53 abutting the plate and being welded thereto, The'shank portion of the 20 the pawls 82 and 8‘: to be moved on their pivots 86 and 88 and to be released from the teeth of ' members EI and the bushings 48 extend into 48. The bushings v48 in turn are rotatably mounted in bearing and spacer members 5i, pro the segments 18 and 80 to enable the springs 84 and 86 to move the segments and thereby oper ate‘the throwl-out latches 48 and 50 to release ers for the throw-out latches. These throw-out latches are duplicates of each other and are oi 25 them from the keeper I0. The reaction of the throw-out latches on the keeper will partially the shape shown in Figures 10 and 12 and each open the door. comprises the outer arcuate edge 52 and the inner The‘ other end of the rod I24 passes freely more or less E shaped edge‘ 54. The edge 54 com through a small block I28 Journally mounted at prises the inner ?nger 58, the outer ?nger 58 and the intermediate ?nger 60. Between ?ngers 56, 30 I30 in the forked end I32 of abell crank lever ' I34 shown in detail in Figure 5. The end of the‘ 58 and 60 there‘ are depressions 62 and 64 in rod I24 has' an enlarged head I35 to‘prevent it which there are received the tongues 66 and 68 abutting relation with the throw-out latches 48 - and 50 only and serve as distance pieces or spac from being pulled through the block I28. This . of a keeper‘I0 rigidly secured to the door post 4. bell crank lever is rigidly mounted at its bore I36 The-keeper ‘I0 is mounted by means of the bolts‘ I2 to a plate ‘I4 set in and welded to a depression 35 to a longitudinally shiftable shaft I38 having an enlarged head I40, the end of which is a cruci ‘I6 in the post 4. This plate ‘I4 has horizontal form shape, as indicated at I42 in Figures 2, 3 serrations ‘I8 on one-half and vertical serrations and 4. The shaft I38 has one end slidably mount 8I on the other half thereof which mate with ed in a mounting bracket or ?xture I44 rigidly like serrations formed on the keeper ‘I0. These serrations make the keeper ‘I0 adjustable both 40 secured to the door post 38. The ?xture I44 has a small bracket I46 rigidly mounted thereon and horizontally and vertically within very narrow this bracket I46 has the integral arm I48 through limits with reference to the base plate 14. Hard the end of which the shaft I38 slidably passes. rubber or ?bre members ‘II are provided on'the The bracket I44 has a circular bore I50 in sides'of the keeper where it contacts-with the which there is slidably received the casing I52 tongues 60 to prevent rattle and noise. The having the lock barrel I53 mounted therein. The keeper I0 acts‘ as a dovetail holding the door in lock barrel I53 (Fig. l) is or the conventional key its normal position with reference to all di operated type. The bell crank lever I34 has one rections. _ arm I54 thereof positioned in the path of the At the inside of the post. 4 and opposite the rear end of‘ the casing I52 and by pushing the plate 14 a'pocket 83 is welded in place. A ?oating casing I52 from the dotted line position ofv Fig type nut member 85 fits loosely in the pocket 83 ure 3 to the full line position, the end of the cas and receives the threaded end of the bolts 72 re ing I52 will strike against the arm I54 to rock movably to hold the keeper on the plate 14. the lever I34 and its shaft I38. This will move On the inside of the pillar 38 there is rigidly the second arm I56 of the lever and pull the rod I24 to operate the cam I20 to release the pawls mounted on each of the shafts 44 and 46 a ' toothed segment ‘I8 or 80 and with which there is adapted to engage ‘a pawl 82 or 84. Retainers - from the segments and cause the operation of (C-washers) BI ?t in a groove in the shaft 44 'or the throw-out latches as has been described in the._foregoing. I 46 and hold the throw-out latches 48 or 50 and the segments ‘I8 or 80 in place. The pawls are pivoted at 86 and 88 and suitable springs 80 and 82 mounted to the plate 42 constantly urge the . pawls 82 or 84 against the toothed edge of the segments ‘I8 and 80. A coil spring 84 surrounds the shaft 44 and is secured at one end to the seg . ment ‘I8 and a second coil spring 86 surrounds the shaft 46 and is secured at one end 88 to the - segment 80. The other ends of the coil ‘springs The shaft I38 is provided with a reduced por tion I58 in which there is received the forked end I60 of a bell crank lever I62 (Fig. 1) pivoted at I64 to the bracket I46. The second arm I66 of the bell crank lever I62 has attached thereto one end of a throw-out rod I68 the top of which is provided with an operating button or knob I10 which projects above the garnish moulding at the lower edge "2 of the window opening in the door 6. By pushing the button downwardly (Fig_ 84 and 86 are secured at I00 to the ?ange 45 of the plate. The springs 84 and 88. constantly urge 78 tires 1 and 7) the bell crank lever H2 is moved from the full line position in Fig’. 'I to the dotted the segments ‘I8 and 80 and the throw-out latches . 48 and 50 to released or door opened position. k line position to cause the forked end I60 to shift the shaft I38 to the left, to the dotted line posi Stops 88 limit thevmovement of the segments by the springs.- » Over and closely adjacent to the springs 84 '15 tion. -. Y‘ The bell crank lever I34 will move with the 2,411,941 5 . . ' ' 6 , . shaft I38 and thereby move the arm I54 from secured to the operating rod I68. The retaining the path of movement of the casing I52. This member '2I8 has a tongue 228 which mates with will prevent the operation of the latch mechanism the corresponding tongue 221 on the retaining from the outside of the door for the reason that member 2I8 and when the parts 2I6 and 2I8 are depressing the push button I14 will not operate in engagement the rod I82 is prevented = from the bell crank lever I34 because the arm I54 \turning. Therefore, the movement of the button is out of the path movement of the casing I52. I10 to its downward position will not only pre By pressing downwardly on the knob I10 the oc vent the operation of the lock and latch mecha cupant of the vehicle can lock the door from the nism from the outside of the door'but also prevent inside. The position of the parts before the 10 its operation from the inside of the door. ‘ _ downward movement of the throw-out rod I68 Referring to Figure 11 the outside panel of the is shown in Figures 1, 2 and 7 while their position door is indicated .at 220. The panel is provided after the operation of the rod is shown in Figure with an opening in which there is positioned the 4 and in dotted outline in Figure 7. As willbe mounting hub 222 for the enlarged head or push seen by the dotted outline I52’, Figure 4, the end 15' button I14 of the slidable shell I52. The hub of the casing I52 projects past the lever arm I54, 222 is held in‘place by means of the ‘nut 224 without moving the arm. ' ' . screw threaded to the hub 222 on the inside of the The mechanism for operating the lock and panel 220. A coil spring 226 is positioned between latch mechanism from the inside of the door is the bracket I44 and the head I14 and constantly best shown in Figures 1,.and'11 to 15. The frame 20 urges the head against the shoulder 228 on the I2 has a mounting bracket I16 rigidly secured ' hub. 222 to limit the outward movement of the thereto and on the end of- this bracket there is _ rigidly mounted a smaller bracket I18 which has ‘two eyes I88 formed in the end thereof. In the eyes I80 there ‘is turnably mounted tube I82. Be tween the eyes I88 there is rigidly secured to the tube I82 an eye I84 of a lever I88 having a forked end I86. A spring I90has one end I92 rigidly shell I52. 0 The door-open position of the throw-out latches ' 48 and 58, is as shown in Figure 12. When the operator closes or slams the door the ?ngers 58 on the throw-out latches will strike the forward edge of the keeper 10 and cause'the throw-out latches to turn and to rotate the shafts 44 and 46. secured to the bracket I16 and the other end I94 This movement of the shafts 44 and 46 will cause secured to the lever I88 and constantly urges the 30 a rotation of the segments 18 and 80 and as the lever away from the bracket I18. ‘ segments rotate the pawls 82 and 84 will engage The free ends of the tines of the fork 186 are in the toothed edge to prevent the segments constantly urged by the spring I90 against the bottom of a cup I96 which is mounted in the hub 34. The cup I96 has secured to the ?anges there of the shell I98, the outer edge of'which is in- turned as at 288 and is provided with a rib 202 over which there is snapped the edge 208 of a button 208 which ?ts into the hollow hub 34. The bottom of the cup I96 is retained againstthe bottom of the spider 32 and the arms of the shell I98 pass through the spaces between the spider arms. A suitable number of coil springs 218 (preferably three) wmounted in recesses in the spider arms constantly urge the ?ange 202-‘ and the shell I98 and the cup I96 to the position from returning. In the full door-closed posi tion the throw-out latches have been moved from the position shown in Figure 12 to the posi i tion shown in Figure 10 and the pawls 82 and 84 will be in engagement with the teeth of the seg ments to a position corresponding to the position I of the throw-out latches shownin Figure 10. The 40 movement of the throw-out latches and the seg ments will have wound up or energized the coil springs 94 and 96. Now when the operator presses either the button I14 or the button 208, the bell crank lever I34 will be operated to shift 45 the-rod I24 which causes the cam vI20 to depress the arms H0 and H2 to pull the pawls 82 and 84 shown in Figure 13. By depressing the button . away from the toothed racks on the segments. , 208 the shell I98 and cup I96 are moved from When the pawls are released the springs 94 and the position'of Figure .13 to that of Figure 14 96 will again throw the throw-out latches to the and in this movement the tines of the fork I86 .1, ‘position shown in Figure 12 which will unlatch are. moved from the position of Figure 13 to that or release the mechanism from the keeper of Figure 14 to cause the rotation of the“ rod I82. 10. The springs 94 and 96, which have been .The other end of the rod I82 (see Figures 1 and energized by closing the door, release this energy 11) is provided with a hollow head 212 which is through the shafts 44 and 46 causing the ?ngers slotted at 2" to conform to the shape of the . 58 of the latches or cams 48 and‘ 50 to bear against keeper 10 with such force that the door is moved received in the slots 2“ and a su?icient amount outwardly to partially open position. The energy of lost motion. in the longitudinal direction is al- 7 required due to different weight of doors will be lowed by the connection between the heads I 42 supplied by ‘the use of springs 94 and 96 having and 2I2. .The reason for this lost motion con 60 a suitable strength. nection is to enable the operating rod I68 to The movement of the throw-out latches 48 and shift the head I42 and lever I34 with reference 50 from the position shown in Figure 10 to that to the tube I82. The movement of the lever I88 shown in Figure 12 will give the door 6 a small from the position of Figure 13 to that of Figure opening movement. v 1 14 will rock or rotate the tube I82 to cause the A threaded stem 238 (Figs. 1 to 4, 7 and 11) has head 2 I2 to rotate the cruciform head I42 and its; a nut 232 locked thereon near its outer end and shaft I38. This will cause the operation of the has its inner end in engagement with the lock lever I34 and thereby cause the operating rod mechanism in the lock barrel I53. The stem I24 to operate the throw-out latches. _In‘this 230 passes through a slot 2341 in the lever I84. manner the depression of the push button 208 T) When the key operates the lock barrel to lock from the inside of the vehicle will operate the . the door a head or a nut (not shown) on the . latch mechanism to release the door. inner end of the stem 230 moves. the lever I34 The rod I82 has rigidly mounted thereon a re outwardly or away from the barrel to move the taining member 2 I6 which is adapted to cooperate lever arm I54 out of the path of movement of the 'with a mating retaining member 2I8 rigidly 75 casing I52. When the key is turned to unlock cruciform head I42. The cruciform head _I42 is 2,411,941 7 ' I . ‘8 . button on the outside of the door, means inter connecting the push button and the said me chanical means to operate said mechanism from - the door the stern 1230 will be moved in the opposite direction to cause the nut 232 to pull the leverv I34 toward the casing'to again move the arm I54 into the path of operation of the ' Y the push button to cause the throw-out latches to casing I52. I claim: be released from the keeper, and means operable from the inside of the vehicle to disconnect said . ' a . . - interconnecting means from the push button to 1. In a lock for the door of an automotive ve render the push button inoperative. \ hicle, a pair of throw-out latches on the door 6. In a lock for the door ofan automotive ve adapted to engage with a keeper when the door is in closed position, springs operativelyconnected 10 hicle, a pair of throw-out latches rotatably mounted on shafts journalled in the door and' to the latches and constantly urging said throw adapted to engage with a keeper on the door out latches to door-open position, means to re post, a spring operatively' connected to each shaftv and constantly urging said shafts and latches to strain the springs from moving the throw-out latches, and means operable from the outside of the door and means operable from the inside .of the door to release said restraining means to en able the springs to move the throw-out latches to release the door. door releasedrposition, said springs mounted in side the door, a segment rigidly mounted on each shaft, a pawl for each segment, said pawls piv» otally mounted on the door, said’ segments and . 2. In a lock for'the door of an automotive ve hicle, a plate secured to the door, a pair of throw out latches pivotally mounted on the-plate and pawls restraining the springs. from moving said latches, means for simultaneously operating said pawls to release the segments and the springs to enable the springs to operate the latches, an op erating rod connected to said means, a lever piv otally mounted on the door, said rod connected to said lever, means exterior to the door to operate said lever and means on the interior of the door to operate said lever, the operation of said lever moving said rod and causing the operation of said means to release the pawls and enable the springs to move ,the latches to door-open posi 30 adapted to engage with a keeper on the door post ‘ to hold the door in closed position, springs mount ed on the ‘plate operatively connected to the latches and constantly urging said throw-out latches to door-open position, releasable means mounted on the plate and restraining said springs from releasing said latches, means simultaneously to release both of said restraining means to en able the springs to move the throw -out latches to release the door, and means operable from the inside of the door and means operable from the outside of the door to operate said releasing means. , v I Y , 3. In a lock for the door of an automotive ve hicle, a pair of throw-out latches mounted on the door and adapted to engage with a keeper mount ed on the door post, a spring for each latch op tion. - - 7. In a lock for the door of an automotive ' vehicle, a pair of throw-out’ latches rotatably mounted on shafts journalled in the door and adapted to engage with a keeper on the door post, '_ a spring operatively connected to each shaft and constantly urging said shafts and latches to door released position, said springs mounted inside the a door, a segment'rigidly mounted on each shaft, eratively connected to the latch and‘constantly 40 a pawl for each segment, said pawls pivotaily mounted on the. door, said segments and pawls. restraining the springs from moving said latches, able means interrelated with each spring to re urging said latches to door-open position, releas strain said rings from moving said throw-out latches, and/a push button operable on the out side of the door and interconnected with said releasable means to cause the release of said means to enable'the throw-out latches to react on > - the keeper to enable the door to be opened. 4. .In a lock for the door of an automotive ve hicle, a pair of throw-out latches mounted on the . door and adapted to engage with a keeper mount ed on the door post, a spring for each latch op eratively connected to the latch and constantly urging said latches to door-open position, releas able means interrelated with each spring to re means for simultaneously operating said pawls to release the segments and'the springs to enable the springs to operate the latches, an operating rod connected to said means, a lever pivotally' mounted on the door, said rod connected to said _ lever, a rod rotatably mounted in the door, means connecting the rotatable rod to the lever, means inside the vehicle connected to the rotatable rod and movable to turn the rod to operate the lever, the operation of said lever moving said operat ing rod and causing the operation of said means to release the pawls 'and enable the springs to move the latches to door-open position. strain said'springs from moving said throw-out 8. In a lock for the door an an automotive latches, a link connected at one end to said re leasable means, a lever connected to the other end vehicle, a pair of throweout latches rotatably a plate mounted on the inside of the door oppo moving said latches, means for simultaneously operating said pawlsto releasethe segments and mounted on shafts iournalled in the door and adapted to engage with a keeper on the door of said link, and a push- button operable from the outside of the door and adapted to operate said .60 post, a spring operatively connected to each shaft and constantly urging said shafts and lever to cause a release of the springs to enable latches to door-released position, said springs the throw-out latches to unlatch the door. mounted inside the door, a segment' rigidly 5. In a lock for the door of an automotive ve - mounted on each shaft, a pawl for each segment, hicle, a pair of throw-out latches rotatably said pawls pivotally mounted on the door, said mounted on shafts journalled in'the door and segments and pawls restraining the springs from r adapted to engage with a keeper on the door post, site the latches, sa'id shafts mounted in said plate, a spring operatively connected to each shaft and adapted constantly to urge the latches to door; open position, a pawl and segment mechanism associated with each shaft and r'eleasably hold the springs to enable the springs to operate the latches, an operating rod connected to said means, a lever'pivotally mounted on the door, said rod connected to said lever, means exterior to the ing said springs, mechanical means for simul door to operate said lever and means on the in taneously operating said pawls to cause said terior of the door to operate said lever, the op throw-out latches to operate in unison, a push 75 eration of said lever 'moving said rodfand caus 2,411,941 ’ _ ing the operation of ‘said means to release the pawls ‘and enable the springs to move the latches ' to door-open position andv means bodily to shift said lever and'remove it from the ?eld of opera tionof thelmeans exterior-to the door which op _ erates the lever. 10 f restraining the springs from moving said latches, means for simultaneously operating said pawls to'release the segments and the springs to enable ‘the springs to operate the latches, an operating . rod connected to said means, a lever pivotally ' " mounted on the door, said rod connected to said ‘9. In a lock for the, door‘ of an, automotive lever, means exterior to the door to operate said vehicle, a_ pair ‘of throw-out latches rotatably mounted on shafts. joumalled in the door‘ and lever and means on the interior of the door to ,a spring operatively connected to each shaft and ' said means to release the pawls and enable the springs to move the latches to door-open position operate said lever, the operation of said lever adapted to engage with a'keeper 'on the door post, 10 moving said rod and causing the operation of constantly urging said shafts ancllatches to door released position, said springs mounted inside the door, a segment rigidly mounted on each shaft, a pawl for each segment, said pawls pivotally mounted on-the door, said segments and pawls ‘and means movable to, engage with the said rotatable rod to prevent the rotation of said rod and the operation of the lever. - ROBERT F. SMITH.