CA2234334A1 - Handle movement clutch mechanism - Google Patents
Handle movement clutch mechanism Download PDFInfo
- Publication number
- CA2234334A1 CA2234334A1 CA 2234334 CA2234334A CA2234334A1 CA 2234334 A1 CA2234334 A1 CA 2234334A1 CA 2234334 CA2234334 CA 2234334 CA 2234334 A CA2234334 A CA 2234334A CA 2234334 A1 CA2234334 A1 CA 2234334A1
- Authority
- CA
- Canada
- Prior art keywords
- combination
- handle
- door
- plate
- movement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed
- E05B17/0058—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed with non-destructive disengagement
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/005—Disconnecting the handle
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/04—Locks or fastenings with special structural characteristics for alternative use on the right-hand or left-hand side of wings
Landscapes
- Lock And Its Accessories (AREA)
Abstract
An apparatus to accommodate turning of a door control handle while the door is locked, which comprises an output shaft to control latching and unlatching of the door; first structure positioned for movement in response to rotation of the control handle;
second structure having operative coupling to the first structure and to the output shaft for displacement to effect rotation of the output shaft in response to the movement of the first structure; and lock structure having an element movable into and out of blocking relation to the second structure, thereby to block the displacement of the second structure when the lock structure element is moved into blocking relation and alternatively to allow displacement of the second structure when the lock structure element is moved out of blocking relation; the operative coupling providing lost motion operative connection between the first and second structures to allow continued rotation of the control handle after the lock structure blocks the displacement of the second structure.
second structure having operative coupling to the first structure and to the output shaft for displacement to effect rotation of the output shaft in response to the movement of the first structure; and lock structure having an element movable into and out of blocking relation to the second structure, thereby to block the displacement of the second structure when the lock structure element is moved into blocking relation and alternatively to allow displacement of the second structure when the lock structure element is moved out of blocking relation; the operative coupling providing lost motion operative connection between the first and second structures to allow continued rotation of the control handle after the lock structure blocks the displacement of the second structure.
Description
BACKGROUND OF THE lNV~. ~ lON
3This invention relates generally to door 4latch actuator~, and more particularly to improvements 5in lockable actuators providing multiple operating 6advantages, including clutching and de-clutching to 7prevent damage when the door is locked.
8When a lockable latch actuator mechanism is ginstalled, it desirably allows for rotation of a handle 10to unlatch the door, when the actuator is unlocked; and 11it desirably restricts such handle movement when the 12actuator mechanism is in locked condition. However, 13the user may then apply such great force to the handle 14seeking to unlatch the locked door, that the locking 15mechanism becomes damaged. There is need to overcome 16this potential damage problem.
17Further, when door latch actuators carrying 18handles are installed, it may be necessary to produce 19either clockwise or counterclockwise rotation of the 20actuator output shaft, depending upon the installation;
21and it is desirable that a single actuator mechanism be 22usable for this purpose. Also, it is desirable that 23that same actuator mechanism be installable for either 24left or right-handed operation. There is need for a CA 02234334 l998-04-08 1 simple, rugged, easily adjustable mechanism that is 2 "universaln in its adaptability to any of the above 3 modes of operation, or combination of such modes.
5SUMMARY OF TH~ INVENTION
7It is a major object of the invention to 8provide improved latching mechanism meeting any and all 9of the above needs. Basically, one form of the 10mechanism of the invention comprises:
11a) an output shaft, which may be offset 12from a control handle, to control latching and 13unlatching of the door, 14b) first structure positioned for movement 15in response to rotation of the control handle, 16c) second structure having operative 17coupling to the first structure and to the output shaft 18for displacement to effect rotation of the output shaft 19in response to such movement of the first structure, 20d) and lock structure having an element 21movable into and out of blocking relation to the second 22structure, thereby to block displacement of the second 2 3structure when the lock structure element is moved into 24 blocking relation, and alternatively to allow such 1 displacement of the second structure when the lock 2 structure element is moved out of that blocking 3 relation, 4 e) the operative coupling providing lost motion operative connection between the first and 6 second structures to allow continued rotation of the 7 control handle after the lock structure blocks that 8 displacement of the second structure.
9 It is another object to provide a simple, effective mechanism, wherein the operative coupling 11 comprises at least one compression spring located in 12 yieldable force-transmitting relation between the first 13 and second structures. The first and second 14 structures, and operative coupling, are typically located within a housing; and the first structure 16 preferably includes a first member, such as a first 17 plate movable longitudinally in the housing, and the 18 second structure preferably includes a second member, 19 such as a second plate movable longitudinally in the housing, the compression spring preferably located 21 between the first and second plates to allow the first 22 plate to move longitudinally toward the second plate 23 when the second plate is blocked against longitudinal 24 displacement. Another compression spring is preferably 1 located in parallel relation with the one compression 2 spring, and in yieldable force-transmitting relation 3 between the first and second structures.
4 A further object includes provision of the operative coupling in the form of a rack and spur gear 6 coupling between the second structure and the output 7 shaft. The second structure typically includes a 8 longitudinally linearly movable plate carrying the 9 rack, the spur gear coupled to the output shaft. The rack may advantageously include primary and secondary 11 rack segments at opposite sides of the spur gear, and 12 controllably shiftable to alternately mesh with the 13 spur gear, whereby the direction of rotation of the 14 output shaft may be controlled. This accommodates installation for either clockwise or counterclockwise 16 handle rotation to open the door.
17 Yet another object includes provision of the 18 lock structure element in the form of an arm shiftable 19 in one direction into blocking relation to the second structure, and in another direction out of blocking 21 relation to the second structure. The secondary 22 structure may typically include a member or plate 23 having a stop shoulder engaged by the arm when the arm 24 is rotatably shifted into blocking relation, and 1 disengaged by the arm when the arm is rotatably shifted 2 out of blocking relation.
3 An additional object includes provision of 4 cam and follower coupling between the handle and the first structure; and further, wherein the coupling 6 includes multiple cam and follower engagement surfaces 7 allowing alternative clockwise and counterclockwise 8 rotation of the handle to effect the movement of the 9 first structure. In this regard, the cam and follower structure may include a primary cam having a surface 11 engageable with primary follower surface on the first 12 structure, and a secondary cam having a surface 13 engageable with a secondary follower surface on the 14 first structure.
These and other objects and advantages of the 16 invention, as well as the details of an illustrative 17 embodiment, will be more fully understood from the 18 following specification and drawings, in which:
DRAWING DFSCRIPTION
22 Fig. 1 is a perspective view of a mechanism 23 incorporating the invention;
24 Fig. 1~ is a diagrammatic view of the output 1 shaft of the Fig. 1 mechanism, in a door latch 2 operating position;
3 Fig. 2 is an enlarged vertical elevation, in 4 section, on lines 2-2 of Fig. 1;
Fig. 3 is an elevation taken in section on 6 lines 3-3 of Fig. 2;
7 Fig. 4 is a view like Fig. 3 showing the 8 positions of elements after handle initial rotation;
g Fig. 5 is a section like that of Fig. 4 showing the position of elements after handle further 11 rotation;
12 Fig. 6 is an enlarged fragmentary view like 13 that of Fig. 4;
14 Fig. 7 is a horizontal section taken on lines 7-7 of Fig. 6;
16 Fig. 8 is an enlarged section taken on lines 17 8-8 of Fig. 6;
18 Fig. 9 is an exploded perspective view of 19 elements shown in Figs. 2-6;
Fig. 10 is a perspective view of the lock arm 21 seen in Figs. 2-6;
22 Fig. 11 is a perspective view of an actuating 23 cam seen in Figs. 2-6; and 24 Fig. 12 is an exploded perspective view 1 showing parts of the mechanism of Figs. 2-6.
3DFT~TTTm DFSCRIPTION
5In Figs. 1-6, a shell or housing 22 is 6elongated and has an outer wall 22a, side walls 22b and 722c, end walls 22d and 22e, and inner wall 22f. The 8shell is metallic and may be anodized. The shell or 9body carries a door control handle 23 rotation of which 10about axis 24 controls opening and closing of a door.
11An output shaft 25 is offset from the control handle 12and is movable, as for example rotatable about an axis 1336, to control latching and unlatching of the door.
14See the diagrammatic view of Fig. 1~ showing that 15rotation of the shaft 25 in door recess 27 operates 16mechanism 28. That mechanism in turn retracts bolt or 17latch 29 from keeper 30. Different arrangements of 18such latching and keepers are of course possible.
19First structure is positioned in the shell or 20housing for movement in response to rotation of the 21control handle. See for example the lost motion plate 1 32, which is movable linearly in directions indicated 2 by arrows 33, and receives guide pin 34 in a bore 35 in 3 the plate. Pin 34 may move up and down with a 4 secondary plate 50 to guide movement of member or plate 32, and keep plates 32 and 50 aligned. A cam 37, 6 carried by a shaft 38, rotated by the handle, slidably 7 engages follower edge 39 on plate 32 as the handle 8 rotates in one direction, to elevate plate 32; and a 9 cam 40, also carried by the handle shaft 38, slidably engages follower edge 41 on plate 32, as the handle 11 rotates in the opposite direction, to elevate the plate 12 32. Note also guide surfaces 43 and 44 on a retainer 13 or retainers 45 in the housing, for guiding linear 14 motion of the plate or plates.
Second structure is positioned in the shell 16 or housing to have operative coupling to the first 17 structure, for displacement to effect rotation of the 18 output shaft, in response to the upward linear movement 19 of the first structure. See for example the slide plate 50, which is movable linearly in directions 21 indicated by arrows 33.
1 Plate 50 i~ coupled, via a pin or pins 152, 2to a slide plate 54, to move longitudinally linearly 3therewith. Plate 54 carries gear racks 51a and 51b, 4selectively positioned so that one or the other rack 5rotates a spur gear 52 on the output shaft 25 in one 6direction or the other direction. Mechanism 52a allows 7such shifting of plate 54. Slide plate 54 slides 8adjacent the shell inner wall 22f.
9Operative coupling of the first structure to 10the second structure is provided, for example, as by 11compression spring structure 60, shown as including 12springs 60a and 60b, to provide operative yieldable 13coupling. Those springs extend between the lower end 14of plate 50 and bottom surfaces of openings 59 in plate 1532, seen in Fig. 6, so that when plate 32 moves 16upwardly, plate 50 is moved upwardly along with plate 1754, to effect rotation of the output shaft 25, provided 18that such upward movement of plate 50 is not stopped or 19blocked. Such springs 60a and 60b provide lost motion 20coupling or connection between the first and second 21structures. An auxiliary compression spring 58 urges 1 plate 50 downwardly, so that plate 50 does not nbottom~
2 upwardly before the door handle is rotated.
3 In this regard, lock structure is provided to 4 have an element movable into and out of blocking relation to the second structure, thereby to block 6 upward displacement of the latter, and alternatively to 7 allow such displacement. For this purpose, the element 8 may comprise an arm shiftable in one direction into 9 blocking relation to the second structure, and in another direction out of blocking relation to the 11 second structure. Also, the arm may be rotatably 12 carried by the housing for the first and second 13 structures; and the second structure may include a 14 plate having a stop shoulder engaged by the arm when the arm is rotatably shifted into blocking relation, 16 and disengaged by the arm when the arm is rotatably 17 shifted out of blocking relation.
18 In the example shown, the lock structure is 19 generally designated at 70, and the blocking arm element at 71, to be rotated about an axis 72, parallel 21 to axis 36. Pivotal mounting of the arm element shaft 22 73 to the housing structure 22h is indicated at 74; and 23 a dog 75 is rotatable by a lock rotor 76 to engage one 1 or the other of the arm element projections 71a and 7Ib 2 to rotatably shift it between blocking and unblocking 3 position relative to stop plate 50 associated with the 4 second structure, as referred to. Note the stop shoulder 78 on the arm element shiftable between 6 blocking position, as seen in Fig. 3 (door locked 7 position), and unblocking position, as seen in Fig. 4 8 (door unlocked position). The stop shoulder on the 9 plate appears at 80.
As disclosed above, cam and follower coupling 11 is provided between the handle 23 and the first 12 structure 32. That coupling may advantageously include 13 multiple cam and follower engagement surfaces as 14 desired allowing alternative clockwise and counterclockwise rotation of the handle to effect the 16 movement of the first structure. Also, the cam and 17 follower coupling may include a primary cam having a 18 surface engageable with primary follower surface on the 19 first structure, and a secondary cam having a surface engageable with a secondary follower surface on the 21 first structure. Thus, rotation of the handle in 22 either direction will open the door, if the lock 23 mechanism is unlocked; and if the lock mechanism is 1 locked, excessive pressure on the handle rotated in 2 either direction will not damage the lock structure 3 (which will remain locked) since lost motion of plate 4 32 will occur.
Slide bearings for plate 32 appear at 32a in 6 Figs. 6 and 8.
7 From the foregoing, it will be seen that the 8 handle lever 23 and internal operating mechanism are 9 protected by the clutch mechanism, whether the lock structure 70 is in locked or unlocked condition or 11 position.
3This invention relates generally to door 4latch actuator~, and more particularly to improvements 5in lockable actuators providing multiple operating 6advantages, including clutching and de-clutching to 7prevent damage when the door is locked.
8When a lockable latch actuator mechanism is ginstalled, it desirably allows for rotation of a handle 10to unlatch the door, when the actuator is unlocked; and 11it desirably restricts such handle movement when the 12actuator mechanism is in locked condition. However, 13the user may then apply such great force to the handle 14seeking to unlatch the locked door, that the locking 15mechanism becomes damaged. There is need to overcome 16this potential damage problem.
17Further, when door latch actuators carrying 18handles are installed, it may be necessary to produce 19either clockwise or counterclockwise rotation of the 20actuator output shaft, depending upon the installation;
21and it is desirable that a single actuator mechanism be 22usable for this purpose. Also, it is desirable that 23that same actuator mechanism be installable for either 24left or right-handed operation. There is need for a CA 02234334 l998-04-08 1 simple, rugged, easily adjustable mechanism that is 2 "universaln in its adaptability to any of the above 3 modes of operation, or combination of such modes.
5SUMMARY OF TH~ INVENTION
7It is a major object of the invention to 8provide improved latching mechanism meeting any and all 9of the above needs. Basically, one form of the 10mechanism of the invention comprises:
11a) an output shaft, which may be offset 12from a control handle, to control latching and 13unlatching of the door, 14b) first structure positioned for movement 15in response to rotation of the control handle, 16c) second structure having operative 17coupling to the first structure and to the output shaft 18for displacement to effect rotation of the output shaft 19in response to such movement of the first structure, 20d) and lock structure having an element 21movable into and out of blocking relation to the second 22structure, thereby to block displacement of the second 2 3structure when the lock structure element is moved into 24 blocking relation, and alternatively to allow such 1 displacement of the second structure when the lock 2 structure element is moved out of that blocking 3 relation, 4 e) the operative coupling providing lost motion operative connection between the first and 6 second structures to allow continued rotation of the 7 control handle after the lock structure blocks that 8 displacement of the second structure.
9 It is another object to provide a simple, effective mechanism, wherein the operative coupling 11 comprises at least one compression spring located in 12 yieldable force-transmitting relation between the first 13 and second structures. The first and second 14 structures, and operative coupling, are typically located within a housing; and the first structure 16 preferably includes a first member, such as a first 17 plate movable longitudinally in the housing, and the 18 second structure preferably includes a second member, 19 such as a second plate movable longitudinally in the housing, the compression spring preferably located 21 between the first and second plates to allow the first 22 plate to move longitudinally toward the second plate 23 when the second plate is blocked against longitudinal 24 displacement. Another compression spring is preferably 1 located in parallel relation with the one compression 2 spring, and in yieldable force-transmitting relation 3 between the first and second structures.
4 A further object includes provision of the operative coupling in the form of a rack and spur gear 6 coupling between the second structure and the output 7 shaft. The second structure typically includes a 8 longitudinally linearly movable plate carrying the 9 rack, the spur gear coupled to the output shaft. The rack may advantageously include primary and secondary 11 rack segments at opposite sides of the spur gear, and 12 controllably shiftable to alternately mesh with the 13 spur gear, whereby the direction of rotation of the 14 output shaft may be controlled. This accommodates installation for either clockwise or counterclockwise 16 handle rotation to open the door.
17 Yet another object includes provision of the 18 lock structure element in the form of an arm shiftable 19 in one direction into blocking relation to the second structure, and in another direction out of blocking 21 relation to the second structure. The secondary 22 structure may typically include a member or plate 23 having a stop shoulder engaged by the arm when the arm 24 is rotatably shifted into blocking relation, and 1 disengaged by the arm when the arm is rotatably shifted 2 out of blocking relation.
3 An additional object includes provision of 4 cam and follower coupling between the handle and the first structure; and further, wherein the coupling 6 includes multiple cam and follower engagement surfaces 7 allowing alternative clockwise and counterclockwise 8 rotation of the handle to effect the movement of the 9 first structure. In this regard, the cam and follower structure may include a primary cam having a surface 11 engageable with primary follower surface on the first 12 structure, and a secondary cam having a surface 13 engageable with a secondary follower surface on the 14 first structure.
These and other objects and advantages of the 16 invention, as well as the details of an illustrative 17 embodiment, will be more fully understood from the 18 following specification and drawings, in which:
DRAWING DFSCRIPTION
22 Fig. 1 is a perspective view of a mechanism 23 incorporating the invention;
24 Fig. 1~ is a diagrammatic view of the output 1 shaft of the Fig. 1 mechanism, in a door latch 2 operating position;
3 Fig. 2 is an enlarged vertical elevation, in 4 section, on lines 2-2 of Fig. 1;
Fig. 3 is an elevation taken in section on 6 lines 3-3 of Fig. 2;
7 Fig. 4 is a view like Fig. 3 showing the 8 positions of elements after handle initial rotation;
g Fig. 5 is a section like that of Fig. 4 showing the position of elements after handle further 11 rotation;
12 Fig. 6 is an enlarged fragmentary view like 13 that of Fig. 4;
14 Fig. 7 is a horizontal section taken on lines 7-7 of Fig. 6;
16 Fig. 8 is an enlarged section taken on lines 17 8-8 of Fig. 6;
18 Fig. 9 is an exploded perspective view of 19 elements shown in Figs. 2-6;
Fig. 10 is a perspective view of the lock arm 21 seen in Figs. 2-6;
22 Fig. 11 is a perspective view of an actuating 23 cam seen in Figs. 2-6; and 24 Fig. 12 is an exploded perspective view 1 showing parts of the mechanism of Figs. 2-6.
3DFT~TTTm DFSCRIPTION
5In Figs. 1-6, a shell or housing 22 is 6elongated and has an outer wall 22a, side walls 22b and 722c, end walls 22d and 22e, and inner wall 22f. The 8shell is metallic and may be anodized. The shell or 9body carries a door control handle 23 rotation of which 10about axis 24 controls opening and closing of a door.
11An output shaft 25 is offset from the control handle 12and is movable, as for example rotatable about an axis 1336, to control latching and unlatching of the door.
14See the diagrammatic view of Fig. 1~ showing that 15rotation of the shaft 25 in door recess 27 operates 16mechanism 28. That mechanism in turn retracts bolt or 17latch 29 from keeper 30. Different arrangements of 18such latching and keepers are of course possible.
19First structure is positioned in the shell or 20housing for movement in response to rotation of the 21control handle. See for example the lost motion plate 1 32, which is movable linearly in directions indicated 2 by arrows 33, and receives guide pin 34 in a bore 35 in 3 the plate. Pin 34 may move up and down with a 4 secondary plate 50 to guide movement of member or plate 32, and keep plates 32 and 50 aligned. A cam 37, 6 carried by a shaft 38, rotated by the handle, slidably 7 engages follower edge 39 on plate 32 as the handle 8 rotates in one direction, to elevate plate 32; and a 9 cam 40, also carried by the handle shaft 38, slidably engages follower edge 41 on plate 32, as the handle 11 rotates in the opposite direction, to elevate the plate 12 32. Note also guide surfaces 43 and 44 on a retainer 13 or retainers 45 in the housing, for guiding linear 14 motion of the plate or plates.
Second structure is positioned in the shell 16 or housing to have operative coupling to the first 17 structure, for displacement to effect rotation of the 18 output shaft, in response to the upward linear movement 19 of the first structure. See for example the slide plate 50, which is movable linearly in directions 21 indicated by arrows 33.
1 Plate 50 i~ coupled, via a pin or pins 152, 2to a slide plate 54, to move longitudinally linearly 3therewith. Plate 54 carries gear racks 51a and 51b, 4selectively positioned so that one or the other rack 5rotates a spur gear 52 on the output shaft 25 in one 6direction or the other direction. Mechanism 52a allows 7such shifting of plate 54. Slide plate 54 slides 8adjacent the shell inner wall 22f.
9Operative coupling of the first structure to 10the second structure is provided, for example, as by 11compression spring structure 60, shown as including 12springs 60a and 60b, to provide operative yieldable 13coupling. Those springs extend between the lower end 14of plate 50 and bottom surfaces of openings 59 in plate 1532, seen in Fig. 6, so that when plate 32 moves 16upwardly, plate 50 is moved upwardly along with plate 1754, to effect rotation of the output shaft 25, provided 18that such upward movement of plate 50 is not stopped or 19blocked. Such springs 60a and 60b provide lost motion 20coupling or connection between the first and second 21structures. An auxiliary compression spring 58 urges 1 plate 50 downwardly, so that plate 50 does not nbottom~
2 upwardly before the door handle is rotated.
3 In this regard, lock structure is provided to 4 have an element movable into and out of blocking relation to the second structure, thereby to block 6 upward displacement of the latter, and alternatively to 7 allow such displacement. For this purpose, the element 8 may comprise an arm shiftable in one direction into 9 blocking relation to the second structure, and in another direction out of blocking relation to the 11 second structure. Also, the arm may be rotatably 12 carried by the housing for the first and second 13 structures; and the second structure may include a 14 plate having a stop shoulder engaged by the arm when the arm is rotatably shifted into blocking relation, 16 and disengaged by the arm when the arm is rotatably 17 shifted out of blocking relation.
18 In the example shown, the lock structure is 19 generally designated at 70, and the blocking arm element at 71, to be rotated about an axis 72, parallel 21 to axis 36. Pivotal mounting of the arm element shaft 22 73 to the housing structure 22h is indicated at 74; and 23 a dog 75 is rotatable by a lock rotor 76 to engage one 1 or the other of the arm element projections 71a and 7Ib 2 to rotatably shift it between blocking and unblocking 3 position relative to stop plate 50 associated with the 4 second structure, as referred to. Note the stop shoulder 78 on the arm element shiftable between 6 blocking position, as seen in Fig. 3 (door locked 7 position), and unblocking position, as seen in Fig. 4 8 (door unlocked position). The stop shoulder on the 9 plate appears at 80.
As disclosed above, cam and follower coupling 11 is provided between the handle 23 and the first 12 structure 32. That coupling may advantageously include 13 multiple cam and follower engagement surfaces as 14 desired allowing alternative clockwise and counterclockwise rotation of the handle to effect the 16 movement of the first structure. Also, the cam and 17 follower coupling may include a primary cam having a 18 surface engageable with primary follower surface on the 19 first structure, and a secondary cam having a surface engageable with a secondary follower surface on the 21 first structure. Thus, rotation of the handle in 22 either direction will open the door, if the lock 23 mechanism is unlocked; and if the lock mechanism is 1 locked, excessive pressure on the handle rotated in 2 either direction will not damage the lock structure 3 (which will remain locked) since lost motion of plate 4 32 will occur.
Slide bearings for plate 32 appear at 32a in 6 Figs. 6 and 8.
7 From the foregoing, it will be seen that the 8 handle lever 23 and internal operating mechanism are 9 protected by the clutch mechanism, whether the lock structure 70 is in locked or unlocked condition or 11 position.
Claims (22)
1. In apparatus to accommodate turning of a door control handle while the door is locked, the combination comprising:
a) an output shaft to control latching and unlatching of the door, b) first structure positioned for movement in response to rotation of the control handle, c) second structure having operative coupling to said first structure and to said output shaft for displacement to effect rotation of said output shaft in response to said movement of said first structure, d) and lock structure having an element movable into and out of blocking relation to said second structure, thereby to block said displacement of said second structure when the lock structure element is moved into said blocking relation and alternatively to allow said displacement of said second structure when the lock structure element is moved out of said blocking relation, e) said operative coupling providing lost motion operative connection between said first and second structures to allow continued rotation of the control handle after said lock structure blocks said displacement of said second structure.
a) an output shaft to control latching and unlatching of the door, b) first structure positioned for movement in response to rotation of the control handle, c) second structure having operative coupling to said first structure and to said output shaft for displacement to effect rotation of said output shaft in response to said movement of said first structure, d) and lock structure having an element movable into and out of blocking relation to said second structure, thereby to block said displacement of said second structure when the lock structure element is moved into said blocking relation and alternatively to allow said displacement of said second structure when the lock structure element is moved out of said blocking relation, e) said operative coupling providing lost motion operative connection between said first and second structures to allow continued rotation of the control handle after said lock structure blocks said displacement of said second structure.
2. The combination of claim 1 wherein said operative coupling comprises at least one compression spring located in yieldable force-transmitting relation between said first and second structures.
3. The combination of claim 2 including a housing, and wherein said first structure includes a first plate movable longitudinally in the housing and said second structure includes a second plate movable longitudinally in the housing, said compression spring located between said first and second plates, to allow the first plate to move longitudinally toward the second plate when the second plate is blocked against longitudinal displacement.
4. The combination of claim 2 including another compression spring located in parallel relation with said one compression spring, and in yieldable force-transmitting relation between said first and second structures.
5. The combination of claim 3 including a guide member extending longitudinally between said first and second plates, to guide longitudinal movement of the first plate relative to the second plate.
6. The combination of claim 5 wherein said guide member comprises a pin, and said plates have bores receiving said pin.
7. The combination of claim 1 wherein said operative coupling includes a rack and spur gear coupling between said second structure and said output shaft.
8. The combination of claim 7 wherein said second structure includes a longitudinally linearly movable plate carrying said rack, said spur gear coupled to said output shaft.
9. The combination of claim 8 wherein said rack includes primary and secondary rack segments at opposite sides of the spur gear, and controllably positionable to alternately mesh with the spur gear, whereby the direction of rotation of the output shaft may be controlled.
10. The combination of claim 1 wherein said lock structure element comprises a blocking arm shiftable in one direction into said blocking relation to said second structure, and in another direction out of said blocking relation to said second structure.
11. The combination of claim 10 wherein said arm is rotatably carried by a housing for said first and second structures, and said operative coupling.
12. The combination of claim 10 wherein said second structure includes a plate having a stop shoulder engaged by said arm when said arm is rotatably shifted into said blocking relation, and disengaged by said arm when said arm is rotatably shifted out of said blocking relation.
13. The combination of claim 1 including cam and follower coupling between the handle and said first structure.
14. The combination of claim 13 wherein said cam and follower coupling includes multiple cam and follower engagement surfaces allowing alternative clockwise and counterclockwise rotation of the handle to effect said movement of the first structure.
15. The combination of claim 4 including an anti-bottoming spring urging said secondary structure toward said first structure.
16. The combination of claim 14 wherein said cam and follower coupling includes a primary cam having a surface engageable with primary follower surface on the first structure, and a secondary cam having a surface engageable with a secondary follower surface on said first structure.
17. In apparatus to accommodate turning of a door handle while the door is locked, the combination comprising a) a first means movable to lock the door, b) a control handle, c) second means movable to block movement of the first means that would unlock the door, d) third means operatively coupling said handle and said first means to transmit handle movement to said first means to open the door when said second means does not block said movement of said first means, and to allow handle movement in response to imposed force when said second means blocks said movement of the first means.
18. The combination of claim 17 wherein said third means includes a first follower element movable by said handle, and compression spring means coupling said follower element to said first means, whereby when said first means is blocked by said second means, movement of the handle is absorbed by compression of said spring means.
19. The combination of claim 18 wherein said first means includes a second follower element positioned to be movable by said first follower element.
20. The combination of claim 19 wherein said spring means is located between said first and second follower elements.
21. The combination of claim 17 wherein said control handle is a lever, and said third means includes clutch mechanism operable to protect said lever irrespective of whether said first means is in a position to lock or to unlock the door.
22. The combination of claim 17 wherein said third means includes clutch mechanism operable to protect internal operating mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85120197A | 1997-05-05 | 1997-05-05 | |
| US08/851,201 | 1997-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2234334A1 true CA2234334A1 (en) | 1998-11-05 |
Family
ID=25310210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2234334 Abandoned CA2234334A1 (en) | 1997-05-05 | 1998-04-08 | Handle movement clutch mechanism |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2234334A1 (en) |
| GB (1) | GB2325020A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2909701A1 (en) * | 2006-12-08 | 2008-06-13 | Jpm Sas Soc Par Actions Simpli | Semi-assembly type operating device for door, has mobile transmission assembly moving in translation along direction parallel to reference plane, and stop system reversibly deformed between two configurations |
| CN201874313U (en) * | 2010-11-25 | 2011-06-22 | 易建华 | Clutch protecting mechanism of mechanical lock |
| CN105735745B (en) * | 2016-04-18 | 2019-11-26 | 广东镖臣防盗设备有限公司 | A kind of indoor protection face board of lockset |
| AU2018313165B2 (en) * | 2017-08-08 | 2022-02-24 | Schlage Lock Company Llc | Door hardware noise reduction and evaluation |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1598066A (en) * | 1976-09-16 | 1981-09-16 | West Alloy Diecasting Ltd | Sliding latch door fasteners |
| US4108482A (en) * | 1977-10-20 | 1978-08-22 | Norris Industries | Disengaging spindle locking mechanism |
| GB2197681B (en) * | 1986-11-19 | 1990-05-16 | Chubb Lips Nederland Bv | Locksets |
| US5010755A (en) * | 1989-11-20 | 1991-04-30 | Best Lock Corporation | Lock with torque-release means |
| US5445423A (en) * | 1993-07-01 | 1995-08-29 | Von Duprin, Inc. | Breakaway lever clutch |
| US5570916A (en) * | 1993-12-27 | 1996-11-05 | Von Duprin, Inc. | Breakaway lever clutch with vertical lift trim |
| US5520427A (en) * | 1993-12-27 | 1996-05-28 | Von Duprin, Inc. | Breakaway lever with wedge release mechanism |
| US5516161A (en) * | 1993-12-27 | 1996-05-14 | Von Duprin, Inc. | Breakaway lever clutch with cam drive pin |
| US5564760A (en) * | 1994-01-10 | 1996-10-15 | Von Duprin, Inc. | Door lever assembly having non-machined fastenerless trim |
-
1998
- 1998-04-08 CA CA 2234334 patent/CA2234334A1/en not_active Abandoned
- 1998-04-30 GB GB9809304A patent/GB2325020A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2325020A (en) | 1998-11-11 |
| GB9809304D0 (en) | 1998-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |