US2796275A - Door lock - Google Patents

Description

: II H E J. H.IROEVTHEL 2,796,275

DOOR LOCK June 1.8, 1957 2 Sheets-Sheet 1 Filed Sept. 8, 1953 INVENTOR.

rrkynfn June 18, 1957 J. H. ROETHEL D003 LOCK Filed Sept. 8, 1953 2 She'ets- Sheet nits State This invention relates to a latch mechanism for swinging doors, particularly the doors of automobiles or other vehicle bodies, an object of the invention being to provide an improved door latch mechanism which is characterized by its simplicity and compactness in construction and which is relatively small in size, economical to manufacture, comparatively quiet in operation and efiicient in use.

More particularly the present invention is embodied in an improved door latch mechanism having a rotatable latch member, a pivoted detent or dog cooper-able therewith, and shiftable detent release means mounted on a supporting plate or the like at the jamb edge or free edge wall of the door, the detent release means being operable from the outside of the door and being rendered inoperative to release or disengage the detent from the latch member by means of a control member, the member being shiftable preferably by inner manually operable means operable from the inside of the door or by a key operated device operable from the outside of the door. In the illustrated embodiment of the present invention, the movable member functions to shift the detent release means out of the path of movement of an outside operator, such as a push button means, thereby rendering the outside operator ineffective to shift the detent release means in the direction of movement necessary to cause disengagement of the detent from the latch device.

It is an object of the present invention to provide improved means for automatically restoring the movable member to a position in which it does not affect the ability of the outside operator to shift the detent release means in a detent disengaging direction, which improved means comprises a swingable member mounted on the supporting plate of the latch mechanism and having one part thereof engageable with the movable member and a second part adapted to engage the latch device only when the movable member has been shifted into position to render the outer manually operable means ineffective to actuate the detent release means. In one embodiment of the present invention the second part of the swingable member upon being moved into engagement with the latch device has two functions. First, when in engagement with the latch device when the door is closed, to restrain rotation of the latch device as a second detent means and thereby to act as a safety device to prevent the vehicle door from being opened from the inside through the inadvertent manipulation of the inside remote control handle, especially by a child while the vehicle is in motion. Second, when in engagement. with the latch device when the door is open, to lie in abutting relation to a part of the latch device in position to be struck by said part upon rotation of the latch device in an unrestrained direction of rotation thereby to cause such swinging movement of said swingable member as will result in the latter shifting said movable member to restore the same to a position in which it will not affect actuation of the detent by the detent release means, the aforementioned rotation of the latch device being such as occurs. when the latch bolt engages the striker device atent ICQ mounted on the body pillar as the door is moved in the direction of closing movement.

Further features, objects, and advantages of the particular embodiments of the invention herein illustrated will appear in the following description, reference being had to the accompanying drawings forming a part of the specification wherein like reference numerals designate corresponding parts in the several views.

Fig. 1 is a sectional elevation taken substantially through lines 1-ll of Fig. 2 looking in the direction of the arrows and illustrating a door lock constructed in accordance with one embodiment of the invention.

Fig. 2 is a section taken substantially through lines 2-2 of Fig. 1 looking in the direction of the arrows.

Fig. 3 is a top elevation of the embodiment of the door lock illustrated in Figs. 1 and 2.

Fig. 4 is a fragmentary view in part similar to Fig. 1 illustrating some of the operative mechanism displaced from the positions thereof shown in Fig. 1.

Fig. 5 is a View in part similar to Fig. 1 illustrating a further embodiment of the present invention.

This application is a continuation in part of my copending application Serial No. 227,3 filed May 21, 1951, now abandoned.

Before explaining in detail the present invention it is to be understood that the invention is not limited in its application to the details of construction and arrangements of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in variou ways.

In the drawings there is illustrated, by way of example, particular embodiments of the present invention as applied to the door and frame structures of an automobile body. The latch device in the embodiment of the invention shown in Figs. 1 to 4, inclusive, comprises a case plate 10 provided with screw bosses 10a by means of which the case plate is secured to the inner side of the jamb portion or' free edge wall of a vehicle door. The case plate It} terminates at its inner edge in a flange 11 which is adapted to be positioned along the inner panel of the door. The latch device is preferably provided with a rotatable toothed latchor bolt 12 positioned at theouter side of the case plate It), this latch or bolt having an integral projecting shaft or shank 13 extending through an aperture in the case plate which is formed with a bearing for the bolt shank. The inner end of the shank 13 of the bolt is flattened and extends through a correspondingly shaped aperture in a rotatable toothed detent engaging member or ratchet l4 and is riveted thereto.

The rotatable latch 12, as shown in dotted outline in Fig. l, is formed with a number of radially projecting tooth-like projections 12a, preferably six, which are spaced equally around the periphery of the latch so as to provide in effect a gear type latch or bolt. The toothed latch member idis also formed around its periphery with a number of tooth-like abutments or projections 14a which correspond in number to the tooth-like projections 12a of the latch bolt.

Pivotally mounted on a shoulder rivet 15 secured to the case plate 10 is a swinging detent, dog, or pawl 16 which has a downwardly projecting detent arm 17 co operable with any one of the projections 14a of the ratchet member 14 in the manner shown in Fig. 1 to hold the ratchet member and, hence, the bolt 12 in locking position against rotation in a counterclockwise direction as viewed in Fig. l. The detent 16 is also an inwardly extending arm or extension 19. Thus, the detent in the embodiments shown is provided with three arms 17, 18, and 19 and is preferably formed from a piece of flat metal stock.

In the present embodiment of the invention there is shown associated with the detent 16 a detent actuating or detent release means, generally designated 21). The detent actuating or detent release means 2%) comprises in part a lever'or arm 21 pivoted at its lower end on the shoulder rivet so as to turn or swing about the axis of the detent 16. The arm 21 overlies the detent arm 18 and the inner edge thereof is in abutting relation to a lug or projection 18a on the detent arm. When the arm 21 is pivoted in a counterclockwise direction as viewed in Fig. 1, its inner edge will abut the lug 18a thereby causing the detent 16 to pivot in a counterclockwise direction about the pivot stud 15 and the detent arm 17 to be disengaged from the ratchet 14.

Pivotally mounted on a pivot stud 22 secured to the upper end of the arm 21 is a compound member comprised of two arms 23 and 24 which are capable of move ment relatively to each other under certain conditions. The arm 23 is pivoted intermediate its ends on the stud 22 and extends normally in a substantially horizontal direction with the inner end 230 thereof in close proximity to the flange 11. The arm 24 is pivoted at its inner end to the pivot stud 22 and its other or outer end is provided with a suitable flange 24a engageable by a plunger or the like 25 which is a part of an outside operator, such as a push button means mounted on the door. The outer end 23b of the arm 23 overlaps a portion of the arm 24, there being sufficient space therebetween to permit the insertion of a spring 26. The spring 26 has one end seated in an aperture in the arm 23 and the other end seated in an aperture in the arm 24. The function of the spring 26 is to yieldingly hold the two arms 23 and 24 in the normal overlapping relation shown in Fig. 1. The arm 23 is provided with a lug 23c projecting from the upper edge thereof which overlies the upper edge of the arm 24 and the spring 26 is preloaded sufliciently to ensure that the two arms are maintained normally in alignment. The reason for the foregoing construction will become apparent as the description proceeds.

The detent 16 is yieldingly urged toward the plate 11 and the detent release lever is urged outwardly toward its retracted position shown in Figs. 1 and 3 by means of a single spring 27. The spring 27 has a spirally wound portion secured to a lug 28 turned up from the surface of the case plate 10. The spirally wound portion of the spring 27 terminates in a downwardly extending arm 27a engaging the detent arm 17 and urging the latter in the directtion of engagement with the ratchet member 14, as shown in Fig. 1. It will be noted that the effort exerted by the spring 27 in urging the detent arm 17 into engagement with the ratchet member 14 will also be transmitted through the lug 18a to the detent release means 20, thereby urging the latter to its retracted position. The final retracted position of the detent release means 20 is determined by a stop 1% in the form of a lug struck up from the surface of the case plate 10 and positioned to be abutted by an edge of the arm 21.

The latch device constructed in accordance with the present embodiment of the invention preferably incorporates a remote control mechanism for permitting release or disengagement of the detent 16 by operation of an inside door handle or other inner manually operable means. This mechanism is preferably manually actuated from the inside of the door remote from the case plate 10 by means of an inside door handle (not shown) which may be turned in the desired direction. A bell crank lever 29 is pivoted on a stud 30 to the case plate flange 11, see Fig. 2. The lower end of one arm 31 of the bell crank lever 29 is pivotally connected at 32 to one end of a longitudinally extending draft link 33, the other end of the draft link being connected in a conventional manner to the inside door handle. The second arm 34 of the bell crank lever projects toward the case plate flange 11 and overlies at its outer end the detent arm 19. Normally, when the inside door handle is turned so as to swing the lever arm 34 downwardly, the latter by engagement with the detent arm 19 will swing the detent 16 in a counterclockwise direction as viewed in Fig. 1 thus swinging the detent arm 17 upwardly from its position shown in Fig. 1 so as to disengage it from the member 14. The disengagement of the detent arm 17 from the ratchet 14 thus may be accomplished from the inside of the door through the coaction of the bell crank lever 29 with the detent arm 19 and from the outside of the door through the coaction of the detent release means 20, with the detent arm 18, in the latter case the detent release means 20 being actuated by the operation of an outside operator, such as by a push button means.

In the present embodiment means is provided for rendering the detent release lever means 20 inoperative to disengage the detent 16 from the ratchet 14. This is accomplished by swinging the release lever arms 23 and 24 as a unit to a position in which the plunger 25 connected to the outside operator is ineffective to engage the flange 24a of the arm 24. As shown in Fig. 4, when the arms 23 and 24 are swung to the position shown therein, the plunger 25 may be moved inwardly without touching the flange 24a and no detent disengaging motion of the detent release means will be caused. The means for swinging the arms 23 and 24 from the operative position shown in Fig. 1 to the inoperative position shown in Fig. 3 comprises a movable member, preferably a slide 35, mounted on the flange 11. The slide 35 is manually shiftable and, in the present instance, may be shifted by an inner manually operable means or by a key operated device, as will more fully be explained. The slide 35 is guided on the case plate flange 11 for movement in a vertical direction by means of upper and lower headed guide studs 36 secured to the case plate flange and extending through vertical guide slots 37 in the slide. The slide 35 is formed near its upper end with a relatively deep outwardly extending projection 38 which, in the present instance, is in the form of a channel shaped rib pressed or embossed in the slide. The projection 38 has a rectangular aperture 39 therein adapted to receive the end 23a of the arm 23. The arm 23 and the slide 35 thus are interlocked for coordinated movements.

In the present embodiment the inner manually operable means for shifting the slide 35 upwardly to its upper limit shown in Fig. 4 and also for returning the slide to its normal position or lower limit shown in Fig. 1 comprises a lever 40 pivotally mounted on a stud 41 secured to the case plate flange 11. This lever 40 has a projecting arm 40a terminating in a rounded end 40b lying within the channel shaped projection 38 on the slide. Pivoted at 42 to the outer end of the lever 40 is a vertically shiftable rod or plunger 43 which extends upwardly through the garnish molding at the inner side of the glass panel of the door. This rod carries at its upper end a knob 44 which may be manipulated at the inside of the door to shift the plunger 43 vertically in either direction thereby rocking the lever 40 and shifting the slide 35 vertically in either direction between its limits of movement as determined by the guide slots 37. The slide 35 is yieldingly held and urged toward its upper and lower limits of movement by means of a snap-over spring 45 of suitable strength attached at one end to the slide and at its opposite end to the case plate flange 11.

From the foregoing construction it will be apparent that by pressing the knob 44 downwardly to rock the lever 40, the slide 35 will be raised. Due to the interlocked connection between the end 23a of the arm 23 and the slide 35, the upward movement of the slide 35 will cause the arms 23 and 24 of the detent release means 20 to swing as a unit about their pivot axis 22 from the position shown in Fig. l to the position shown in Fig. 3. The flange 24a of the arm 24 will thus be placed out of the path of movement of the push button plunger 25 thereby to render the latter ineffective to cause the detent release means 20 to disengage the detent 16 from the ratchet 14. Conversely, when the knob 44 is pulled upwardly the slide 35 will 5 be shifted downwardly therebyswinging the arms 23 and 24 so as to restore the flange 24a in abutting relation to the push button plunger 25.

A key controlled means for shifting the slide 35 is usually embodied in one or both of the front door locks of an automobile body but is usually omitted from the locks used on the rear door. In the present embodiment the slide is illustrated as being shiftable by a key operated device acting through a lever 46 pivotally mounted intermediate its ends on a stud 47 fastened to the case plate 10. The inner end 46a of the lever 46 projects through an aperture or notch 48 in the lower end of the slide 35, the lever and the slide thereby being interlocked for coordinated movements. Thus, if the lever 46 is swung so as to swing its inner end 46a upwardly or downwardly the slide 35 will be correspondingly moved upwardly or downwardly.

An illustrative means for swinging the lever 46 through a'key controlled device from the outside of the door comprises a pin 48 mounted on any suitable member 49 attached to the end of the shaft 50 of a conventional key cylinder mechanism (not shown). The pin 48 is mounted for movement eccentrically of the axis of rotation of the shaft 50 and extends through an aperture 51 in the flange 52 of the lever 46. Turning movement on a key inserted in the key cylinder mechanism will be translated through the pin 48 into swinging movement of the lever 46 and this in turn will result in the slide 35 being shifted up or down as the case may be. It is to be noted that whenever the slide is shifted through actuation of the push button 44 of the inner manually operable means for shifting the slide 35, the lever 46 will be moved in accordance with the direction of movement of the slide. The fact that the slide 35 and the lever 46 are interlocked for correlated movement is an important feature of the present invention as will be apparent as the description proceeds.

The lever 46 is provided with a projection 53 extending toward the ratchet 14 from the upper edge of the end 46a of the lever. The projection 53 is adapted to engage any one of the abutments or shoulders 14a of the ratchet 14 in the same manner as the abutments are adapted to be engaged by the detent arm 17. Whereas the detent arm 17. is normally in engagement with the ratchet 14, the projection 53 on the lever 46 is normally not in engagement with any portion of the ratchet 14 but is only engageable therewith when the slide 35 and therefore the end 46a of the lever 46 are in their up position asdistinguished from their normal down position shown in Fig. 1. When the projection 53 on the lever 46 is in engagement with any one of the abutments 14a on the ratchet 14, it functions to restrain rotation of the latch bolt in the same manner as the detent arm 17 and will continue to restrain rotation of the latch bolt even if the detent is released from the ratchet by operation of the inside remote control means to actuate the bell crank lever 29. Thus, if the door is intentionally locked from the inside by manipulation of the garnish molding push button, the door cannot be opened from the inside through actuation of the inside remote control handle means. This feature is particularly desirable as a safety device to prevent inadvertent opening of the vehicle door while the vehicle is in motion since it is necessary that the garnish molding push button first be manipulated to release the lever projection 53 from the ratchet 14 before the door can be opened.

The projection 53 serves a second function in that it is a means for restoring the parts of the latch mechanism to the normal position shown in Fig. 1 in the'event that the parts are moved into the position shown in part in Fig. 3 after the door has been swung open. Upon movement of the door to a closed position the bolt 12 will engage the striker device mounted on the body pillar and will be rotated in a clockwise direction as viewed in Fig. 1. The projection 53 will be abutted by the abutments 14a on the ratchet and cause the lever 46 to be swung in a direction to carry the slide 35 downwardly and 6 thus place the arm. 24 of the detent release means 26 in operative relation to the push button plunger 25.

Asshown in dotted outline in Fig. 4, the plunger 25 of the outside operator is movable into the path of swinging movement of the arm 24 of the detent release means 26 when the arms 23 and 24 have been swung into the position shown in Fig. 4, that is, the position in which the outside operator is rendered ineffective to actuate the detent release means. As has been described, it is possible to place the parts of the lock mechanism in the position shown in Fig. 4 when the vehicle door is open. Rotation of the latch bolt upon engagement of the same with a striker device as the door is moved to a closed position results in the restoration of the parts of the lock mechanism to the position shown in Fig. l'through the coaction of the ratchet 14 with the lever 46 as has been explained. Thus, there is the contingency that the parts ofthe lock mechanismmight be placed in the position shown in Fig. 4 when the door is open and that the door might be moved to a closed position with the push button plunger 25 depressed inwardly and in the path of swinging movement of the arm 24 of the detent release means. It is readily apparent that the lock mechanism could be jammed by such action if no provision were made for some part of the lock mechanism to yield until the plunger 25 is released.

The construction and arrangement of the arms 23 and 24 provide the yieldable structure necessary to prevent jamming of the lock mechanism under the foregoing conditions. As has been described, the arms 23 and 24 are independently pivoted on the pivot stud 22 and are yieldably connected for movement as a unit by the spring 26. In the event that swinging movement of the arm 24 from the position shown in Fig. 4 to the position shown in Fig. l is impeded by the push button plunger 25, the spring 26 will yieldably permit the arm 23 to move independently of the arm 24 thus permitting the arm 23, the slide 35, and the lever 46 all to be returned to their normal or latch unlocked position from a latch locked position as a result of the coaction between the ratchet 14 and the projection 53 on the lever 46. As soon as the push button plunger is released or retracted from the path of the arm 24, the spring 26 will return the arm 24 to its normal position shown in Fig. l and the detent release means 2% will be wholly operative to release the detent from the ratchet upon actuation by the outside operator. The spring 26 is relatively weak compared to the spring 45 and offers little resistance to the movement of the slide 35 from its upper or latch locked position to its lower or latch unlocked position.

The phrase latch locked position is defined as that position of the slide in which the operative relation between the detent release means 20 and the outside operator is such that actuation of the latter is ineffective to cause the detent release means to release the detent from the ratchet. The phrase latch unlocked position refers to the converse of the foregoing. Fig. 1 shows the parts of the mechanism in the latch unlocked position.

Fig. 5 illustrates a further embodiment of the latch mechanism wherein the control means for rendering the detent release means ineffective to actuate the detent means is of a modified construction. In the present embodiment the arm 79 corresponding to the arm 23 of the embodiment of Figs. 1 to 4 inclusive is provided with a longitudinally extending slot 71 in the end 70a thereof. A vertically extending rod 72 is provided, the rod having a right angle bend therein at 73. As shown in- Fig. 5, the right angle bend portion '73 of the rod 72 projects through the slot '71. The lower end 74 of the rod is pivotally connected at '75 to the apertured end 76 of the lever 46. At its upper end '77 the rod 72 is provided with a button 78 which is adapted to be manually grasped to shift the rod 72 in either an up or down direction.

In Fig. 5 the rod 72 is shown in its down position. In this position the flange 24a of the arm 24 is in position to be engaged by the outer manually operable means, such as the push button 25 shown in Fig. 1 so that actuation of .the outer manually operable means will result in release of the detent means from the latch device. It will be understood that horizontal movement of the arms 70 and 24 of the detent release means in response to actuation by the outer manually operable means, such as the push button 25, will have no effect on the rod 72 because of the slot 71 in the end 70a of the arm 70. It will be further understood that the rod '72 will be held against movement except in a vertical direction, by the garnish molding at the inside of the vehicle door through which the upper end 77 of the rod is adapted to project. When the knob 78 is grasped and pulled upwardly, the rod 72 will swing the detent release means arms 70 and 24, as a unit, and the lever 46 in a clockwise direction, as viewed in Fig. 5. The effect of the rod 72 swinging these members in a clockwise direction is the same as occurred when the counterpart members of the embodiment of Figs. 1 to 4 inclusive were swung in the same direction in response to movement of the slide member 35.

in its mode of operation the present embodiment is the same as the embodiment of Figs. 1 to 4 and it is not believed necessary to repeat the details thereof.

1 claim:

1. in a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wail of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted on said lever, means manually operable from the outside of the door engageable with said transmitting member for shifting the latter thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing independently of said lever, said lever at one side of the pivotal axis thereof being provided with a part arranged in opposing relation to a part of said detent means to abut the same at the same side of the pivotal axes of said lever and detent means upon swinging movement of said lever in one rotative direction thereby to pivotally move said detent means in the same rotative direction out of holding position with respect to said latch device, a control member mounted for shiftable movement on said support, said transmitting member having a portion thereof interlocked with said control member, whereby upon movement of said control member in one direction from its normal position said transmitting member will be swung to a position in which it is unengageable by the means manually operable from the outside of the door thereby to render the latter ineffective to swing said lever in said one rotative direction and render the same ineffective to move said detent means out of holding position with respect to said latch device, and manually operable means for shifting said control member.

2. In a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted on said lever, means manually operable from the outside of the door engageable with said transmitting member for shifting the latter thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing independently of said lever, said lever at one side of the pivotal axis thereof being provided with a part arranged in opposing relation to a part of said detent means to abut the same at the same side of the pivotal axes of said lever and detent means upon swinging movement of said lever in one rotative direction thereby to pivotally move said detent means in the same rotative direction out of holding position with respect to said latch device, a control were 7 8 member mounted for shiftable movement on said support, said transmitting member having a portion thereof interlocked with said control member, whereby upon movement of said control member in onedirection from its normal position said transmitting member will be swung to a position in which it is unengageable by the cans manually operable from the outside of thedoor thereby to render the latter ineffective to swing said lever in said one rotative direction and render the same ineffective to move said detent means out of holding position with respect to said latch device, manually operable means for shifting said control member including a swingablc member pivotally mounted on said support having a portion thereof interlocked with said control member, said swingable member having a projection thereon movable into abutting relation to a part of said latch device upon said control member being shifted in said one direction, whereby upon rotation of said latch device said part of said latch device will abut said projection and urge said swingable member in a direction to shift said control member to its normal position and restore said transmitting member into engageable relationship with said means manually operable from the outside of the door.

3. In a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted intermediate its ends on said lever, means manually operable from the outside of the door engageable with one end of said transmitting member for shifting the latter thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing independently of said lever, said lever at one side of the pivotal axis thereof being provided with a part arranged in opposing relation to a part of said detent means to abut the same at the same side of the pivotal axes of said lever and detent means upon swinging movement of said lever in one rotative direction thereby to pivotally move said detent means in the same rotative direction out of holding position with respect to said latch device, a control member mounted for shiftable movement on said support, said transmitting member at its other end having a portion thereof interlocked with said control member, whereby upon movement of said control member in one direction from its normal position said transmitting member will be swung to a position in which it is unengageable by the means manually operable from the outside of the door thereby to render the latter ineffective to swing said lever in said one rotative direction and render the same ineffective to move said detent means out of holding position with respect to said latch device, and manually operable means for shifting said control member.

4. In a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted intermediate its ends on said lever, means manually operable from the outside of the door engageable with one end of said transmitting member for shifting the latter thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing independently of said lever, said lever at one side of the pivotal axis thereof being provided with a part arranged in opposing relation to a part of said detent means to abut the same at the same side' of the pivotal axes of said lever and detent means upon swinging movement of said lever in one rotative direction thereby to pivotally move said detent means in the same rotative direction out of holding position with respect to said latch device, a control member mounted for shiftable movement on said support, said transmitting member at its other endrhaving a portion thereof interlocked with said control member, whereby upon movement of said control member in one direction from its normal position said transmitting member will be swung to a position in which it is unengageable bythe means manually operable from the outside of the door thereby to render the latter ineifective to swing said lever insaid one rotative direction and render the same ineflfective to move said detent means out of holding position with respect to said latch device, manually operable means for shifting said control member including a swingable member pivotally mounted on said support having a portion thereof interlocked with said cont-r01 member, said swingable member having a projection thereon movable into abutting relation to a part of said latch device upon said control member being shifted in said one direction, whereby upon rotation of said latch device said part of said latch device will abut said projection and urge said swingable member in a direction to shift said control member to its normal position and restore said transmitting member into engageable relationship with said means manually operable from the outside of the door. I

5. in a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted on said lever, means manually operable from the outside of the door engageable with said transmitting member for shifting the latter thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing relatively to said lever about a common pivot point axis therewith, said lever having a part arranged in opposing relation to a part on said detent means to abut the same upon swinging movement of said lever thereby to pivotally move said detent means out of holding position with respect to said latch device, a control member mounted for up and down movement on said support, said transmitting member having a portion thereof interlocked with said control member, whereby upon movement of said control member in one direction from its normal position said transmitting member will be swung out of engagement with the means manually operable from outside the door thereby to render the latter ineffective to swing said lever to cause disengagement of the detent means from the latch device, manually operable means for shifting said control member including a swingable member pivotally mounted on said support having a portion thereof interlocked with said control member, said swingable member having a projection thereon movable into abutting relation to a part of said latch device upon said control member being shifted in said one direction, whereby upon rotation of said latch device said part will abut said projection and urge said swingable member in a direction to shift said control member to its normal position and restore said transmitting member into engageable relationship with said means manually operable from the outside of the door.

6. In a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted on said lever, means manually operable from the outside of the door for shifting said transmitting member thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing relatively to said lever about a common pivot aXis therewith, said lever having a part arranged in opposing relation to a part on said detent means to abut the same upon swinging movement of said lever thereby to pivotally move said detent means out of holding position with respect to said latch means, control means movably mounted on the support, said transmitting member having a portion thereof interlocked with said control means, and inner manually operable means for shifting said control means in one direction from its nonnal position thereby to swing said transmitting member to render the means manually operable from the outside of the door ineffective to shift the transmitting member to swing said lever, said control means including a member pivotally mounted on said support and having a projection thereon movable into abutting relation to a part of said latch device upon said control means being shifted in said one direction, whereby upon rotation of said latch device said part will abut said projection and swing said control means member in a direction to shift said control means to its normal position and restore the effective relationship of the means manually operable from the outside of the door to the transmitting member.

7. In a latch mechanism for a swinging door, a support including a plate portion for disposition at the free edge wall of the door having a flange extending from the inner edge of said plate portion, a rotatable latch device mounted on said plate portion, a lever pivotally mounted on said plate portion, a transmitting member pivotally mounted on said lever, means manually operable from the outside of the door for shifting said transmitting member thereby to swing said lever, detent means engageable with said latch device for holding it in door latching position, said detent means being pivotally mounted on said plate portion to swing independently of said lever about a common pivot axis therewith, said lever having a part arranged in opposing relation to a part on said detent means to abut the same upon swinging movement of said lever thereby to pivotally move said detent means out of holding position with respect to said latch device, control means movably mounted on the flange, said transmitting member having a portion thereof interlocked with said control means, and inner manually operable means for shifting said control means in one direction from its normal position thereby to swing said transmitting member to render the means manually operable from the outside of the door ineffective to shift the transmitting member to swing said lever, a swingable member pivotally mounted on said plate portion having a portion thereof extending toward said flange and interlocked with said control means, said swingable member having a projection thereon movable into abutting relation to a part of said latch device upon said control means being shifted in said one direction, whereby upon rotation of said latch device said part will abut said projection and drive said swingable member in a direction to shift said control means to its normal position and restore the effective relationship of the means manually operable from the outside of the door to the transmitting member.

8. In a latch mechanism for a swinging door, a support, a rotatable latch device mounted on said support, detent means engageable with said latch device for holding the same in door latching position, outer manually operable means for disengaging said detent means from said latch device and including lever arm means, a swingable transmitting member shiftable to move the lever arm means, and outside shiftable means engageable with said transmitting member for shifting the same thereby to move said lever arm means in detent disengaging direction, and inner manually operable means for swinging said transmitting member into a position in which said outside shiftable means is free to be shifted but is ineffective to operatively engage said transmitting member, said inner manually operable means having a part thereon movable into abutting relation to a part of said latch device upon said inner manually operable means swinging said transmitting member into said position, whereby References Cited in the file of this patent UNITED STATES PATENTS Dall Nov. 12, 1940 Roethel Jan. 23, 1951 Roethel June 19, 1951 Roethel Feb. 24, 1953

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