CA2575543A1 - Handicap exit device retrofit kit - Google Patents
Handicap exit device retrofit kit Download PDFInfo
- Publication number
- CA2575543A1 CA2575543A1 CA002575543A CA2575543A CA2575543A1 CA 2575543 A1 CA2575543 A1 CA 2575543A1 CA 002575543 A CA002575543 A CA 002575543A CA 2575543 A CA2575543 A CA 2575543A CA 2575543 A1 CA2575543 A1 CA 2575543A1
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- Prior art keywords
- actuator
- cam
- actuator cam
- key
- hole
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Classifications
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- 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
- E05B63/0013—Locks with rotary bolt without provision for latching
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/10—Locks or fastenings for special use for panic or emergency doors
- E05B65/1086—Locks with panic function, e.g. allowing opening from the inside without a ley even when locked from the outside
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention provides a retrofit device for use in a door lock. The device comprises an improved actuator cam, a housing for said actuator cam, a threaded hollow tube and a lever handle for opening a door lock. The improved actuator cam is a solid one-piece device which comprises an inverted teardrop shaped cam plate, an actuator shaft, a raised key and a detent.
The raised key when installed into a key-hole shaped slot of the lever arm will engage the locking lever arm to drive the lever arm back and forth, from a locked position to an unlocked position. The detent displaces a latching pin which engages and displaces the lever handle simultaneously and enables the lever handle to come to rest at a desirable angular position.
The raised key when installed into a key-hole shaped slot of the lever arm will engage the locking lever arm to drive the lever arm back and forth, from a locked position to an unlocked position. The detent displaces a latching pin which engages and displaces the lever handle simultaneously and enables the lever handle to come to rest at a desirable angular position.
Description
Field of Invention This invention relates to improvement in door locks. In particular, this invention relates to improvements in door locks of the type manufactured and sold by Adams Rite Industries as described in Canadian patent no. 1,016,975 dated September 6, 1977, Bradstock.
Description I3ccause ofthe fact that it is necessary to rotate the actuator shaft through 360 degrees, it is nol possible to mount a conventional lever handle on the actuator shaft as the lever hancile would toul with the door jamb and not be capable of being rotated through 360 degrees.
To overcome this difficulty, in some jurisdictions, the fire departments have permitted the use of a short T-shaped handle commonly known as a thumb handle or thumb turn. By making the handle or elongated knob very short, it is possible to obtain the required 360 degree rotation without fouling with the doorjamb. This type of handle is not, however considered to be the nlost desirable form of handle by those persons responsible for fire safety regulations and those responsible for handicap access. The preferred forni of handle is the conventional lever handle which is normally moved through 90 degrees to effect the unlocking and locking of a door lock.
The actuator cam and the abutment posts of the Bradstock patent are specifically designed and arranged to ensure that the downstream abutment post is displaced out of the path of travel of the detent or cam extension when the rotation of the actuator is completed in a first direction such that when the direction of the rotation of the cam is reversed, the abutment post which had previously been the downstream abutment post and is now the upstream abutment post and is located out of the path of the actuator cam detent so that the detent or cain extension can gain access to the latching pin to effect displacement of the latching pin. To permit a 360 degree rotation of the actuator shaft, the downstream abutment post must be displaced out of the path of travel of the detent.
Various attempts have been made to modify the Bradstock structure to permit operation by means of a conventional lever handle. These attempts have, however required radical modifications of the abutment posts of the lever arm, and the locks which have been modified have experienced difficulties in use resulting from these modifications and as a result have not been widely accepted. Other attempts at modifying the lever and cam action through the use of many moving parts which consisted of gears and springs have also been mechanically unsound in the marketplace. Other previous attempts through our own past efforts had also failed and so much more thought and effort had to be applied in our quest for a successful product.
Description I3ccause ofthe fact that it is necessary to rotate the actuator shaft through 360 degrees, it is nol possible to mount a conventional lever handle on the actuator shaft as the lever hancile would toul with the door jamb and not be capable of being rotated through 360 degrees.
To overcome this difficulty, in some jurisdictions, the fire departments have permitted the use of a short T-shaped handle commonly known as a thumb handle or thumb turn. By making the handle or elongated knob very short, it is possible to obtain the required 360 degree rotation without fouling with the doorjamb. This type of handle is not, however considered to be the nlost desirable form of handle by those persons responsible for fire safety regulations and those responsible for handicap access. The preferred forni of handle is the conventional lever handle which is normally moved through 90 degrees to effect the unlocking and locking of a door lock.
The actuator cam and the abutment posts of the Bradstock patent are specifically designed and arranged to ensure that the downstream abutment post is displaced out of the path of travel of the detent or cam extension when the rotation of the actuator is completed in a first direction such that when the direction of the rotation of the cam is reversed, the abutment post which had previously been the downstream abutment post and is now the upstream abutment post and is located out of the path of the actuator cam detent so that the detent or cain extension can gain access to the latching pin to effect displacement of the latching pin. To permit a 360 degree rotation of the actuator shaft, the downstream abutment post must be displaced out of the path of travel of the detent.
Various attempts have been made to modify the Bradstock structure to permit operation by means of a conventional lever handle. These attempts have, however required radical modifications of the abutment posts of the lever arm, and the locks which have been modified have experienced difficulties in use resulting from these modifications and as a result have not been widely accepted. Other attempts at modifying the lever and cam action through the use of many moving parts which consisted of gears and springs have also been mechanically unsound in the marketplace. Other previous attempts through our own past efforts had also failed and so much more thought and effort had to be applied in our quest for a successful product.
2 Summary Of Invention It was found that we can obtain the required 90 degree lever handle operation of the lock by providing a simple and inexpensive replacement actuator cam. The actuator cam and its components are quite unique and collectively these parts and the way they are installed make the lever handle and its components work in a totally unique manner.
The new actuator cam works in a different manner than the conventional known cam or any later types of known cams. The new actuator cam is a solid one piece cam shaped like an upside down teardrop, with a raised key near the flattened pointed end or detent. The raised key when installed into the key-hole shaped slot of the lever arm in the larger round hole portion end of the key-holed shaped slot will then engage the locking lever arm and will drive the lever arm back and forth, from a locked position to an unlocked position.
The fact that the raised key is captured in the key-hole shaped slot of the lever arm arrests the movement of the new actuator cam after displacement of the latching pin.
When the bolt has reached either the locked or unlocked positions, the rotation of the actuator shaft is halted and the required predetermined angular displacement is achieved.
"I'he new actuator cam actually bypasses the low strength parts of the lock which are specifically the abutment posts and by engaging the lever arm through the direct engagenient with the key-hole shaped slot in the enlarged hole portion of the key-hole shaped slot, the new actuator cam detent not only displaces the latching pin but also directly engages the locking lever arm and displaces it at the same time as well as coming to rest at the properly desired angular position.
The new actuator cam works in a different manner than the conventional known cam or any later types of known cams. The new actuator cam is a solid one piece cam shaped like an upside down teardrop, with a raised key near the flattened pointed end or detent. The raised key when installed into the key-hole shaped slot of the lever arm in the larger round hole portion end of the key-holed shaped slot will then engage the locking lever arm and will drive the lever arm back and forth, from a locked position to an unlocked position.
The fact that the raised key is captured in the key-hole shaped slot of the lever arm arrests the movement of the new actuator cam after displacement of the latching pin.
When the bolt has reached either the locked or unlocked positions, the rotation of the actuator shaft is halted and the required predetermined angular displacement is achieved.
"I'he new actuator cam actually bypasses the low strength parts of the lock which are specifically the abutment posts and by engaging the lever arm through the direct engagenient with the key-hole shaped slot in the enlarged hole portion of the key-hole shaped slot, the new actuator cam detent not only displaces the latching pin but also directly engages the locking lever arm and displaces it at the same time as well as coming to rest at the properly desired angular position.
3 According to one aspect of the new invention, there is provided in a door lock of the type having a rotatably mounted cam which has a detent which serves to displace a latching pin and to engage the downstream abutment post of a pair of abutment posts which are mounted upstream and downstream of the locking pin with respect to the direction of rotation of the actuator cam, the abutment posts being mounted on a lever arm which is connected to a locking bolt, such that, rotation of the actuator cam in one direction or the other will cause the detent to displace the latching pin and thereafter engage the downstream abutment post to effect movement of the lever arm which in turn effects movement of the locking bolt between an unlocked position and a locked position and to move the downstream abutment post clear of the path of the detent so as to permit the detent to gain access to the latching pin when the direction of rotation of the actuator cam is reversed, the improvement of the raised key formed on the new actuator cam plate is such that the raised key and detent actually bypasses either abutnlent posts as defined in the previous description of the existing locking device.
The raised key on the new actuator cam plate is so designed in shape and size so as to fit exactly in the enlarged round hole portion of the key-hole shaped slot of the lever arm.
The direct engagement of the new actuator cam raised key with the enlarged round hole portion of the key-hole shaped slot captures the raised key within the lever arm and drives the lever arm back and forth between the locked and unlocked position of the bolt and the rotation of the actuator cam is less than 90 degrees.
According to yet another aspect of the present invention there is provided an actuator assembly for use in a door lock of the type having a detent for displacing a latching pin which is mounted on a lever arm which is connected to a locking bolt, the lever arm having abutment posts located
The raised key on the new actuator cam plate is so designed in shape and size so as to fit exactly in the enlarged round hole portion of the key-hole shaped slot of the lever arm.
The direct engagement of the new actuator cam raised key with the enlarged round hole portion of the key-hole shaped slot captures the raised key within the lever arm and drives the lever arm back and forth between the locked and unlocked position of the bolt and the rotation of the actuator cam is less than 90 degrees.
According to yet another aspect of the present invention there is provided an actuator assembly for use in a door lock of the type having a detent for displacing a latching pin which is mounted on a lever arm which is connected to a locking bolt, the lever arm having abutment posts located
4 one on either side of the path of travel of the latching pin and the shaft mounted for rotation proximate the latching pin, said actuator assembly comprising of an actuator housing, an actuator shaft mounted for rotation in said housing, said actuator shaft having first and second ends at opposite ends of said actuator housing, a longitudinally elongated actuator handle having one end mounted on said first end of said actuator shaft, the longitudinal extent of said handle projecting radially from one side of said actuator shaft, an actuator cam mounted on said second end of said actuator shaft, said actuator cam having an axis of rotation, a detent projecting radially from said axis of rotation and a raised key formed on the actuator cam plate in sucli a position so as to engage the enlarged round hole portion in the key-hole shaped slot on the lever arm and effectively arrest the movement of the actuator cam and limit the actuator member rotation to less than 90 degrees.
The American Disabilities Act The Door Hardware Provisions to make public accommodations "readily accessible" to the disabled include the following:
"4.13.9" Door Hardware, handles, pulls, latches, locks and other operating devices on accessible doors shall have a shape that is easy to grasp with one hand and does not require tight pinching, or twisting of the wrist to operate.
Lever mechanisms, push type mechanisms, and U- shaped handles are acceptable designs. When sliding doors are fully open, operating hardware shall be exposed and usable from both sides. In dwelling units, only doors at accessible entrances to the unit itself shall comply with the requirements of this paragraph. Doors to hazardous areas shall have hardware complying with "4.29.3 ". No door hardware should be mounted for accessible door passage higher t.han 48 inches (1220 mm ) above the finished floor.
CANADA Design Standards 3.7.3 Doorways and Doors 3.7.3.3 Door operating devices shall be of a design which does not require tight grasping and twisting of the wrist as the only means of operation.
3.4.5.15. 3.3.1.12 Door Release Hardware Locking and, latching and other fastener devices on every exit door shall permit the door to be readily opened from the inside with not more than one releasing operation and without requiring keys, special devices or specialized knowledge of the door opening mechanism.
If a door is equipped with a latching mechanism, a device that will release the latch and allow the door to swing wide open when a force of not more than 90 N
(20 l.bs. ) is applied to the device in the direction of travel to the exit.
Prior Art The actuator member of the lock described in the Bradstock patent includes a conventional key operated rotor shaft which must be rotated through 360 degrees to permit removal of the key.
T'he actuator cam has a profile which includes a detent or cam extension which engages the latching pin which is slidably mounted in the lever arm to move the latching pin out of one or the other of the sidewall dwell notches, which are located at opposite ends of the actuator slot in which the latching pin moves in relation to the lock casing.
The cam extension or detent then engages the downstream abutment post which is carried by the lever arm to effect movement of the locking bolt between its open and closed positions.
The door locks of this type are commonly used in public commercial buildings and fire and handicap regulations in many jurisdictions provide that the doors to such buildings must be capable of being opened by operation of a handle which does not require dexterity on the part of the user to effect opening and closing of the lock. In case of a fire, the occupants attempting to escape a building may have their ability to locate a key in a lock impaired by the fuines generated by the fire or the inability to see the lock opening because of the smoke generated by fire.
Preferred Embodiments The invention will be more clearly understood after reference to the following detailed specifications read in conjunction with the drawings wherein;
Fizure 1 is a partially exploded side view of a door lock of the Adams Rite type known invention with a known keyed lock cylinder; Prior art - sheet no. 1 of 3 FiQure 2 is a sectional side view of the door lock of Figure 1; Prior art -sheet no. I of 3 Figure 3 is an enlarged detailed view of the known cam actuator plate of the known invention of Figure 1 and Figure 2: Prior art - sheet no. I of 3 Fizure 4 is an enlarged detailed view similar to Figure 3 showing the operation of the known actuator cam plate of the known invention in Figure 1 and Figure 2: Prior art -sheet no. 1 of 3 Fi ure S is a pictorial view of a known latching pin which is used in the door lock in Figure 1;
Prior art - sheet no I of 3 Figure 6 is a pictorial view of a known thumb turn cylinder that is used in the door lock in Figure 1; Prior art - sheet no. I of 3 FiQure 7 is a pictorial view of an known keyed mortise cylinder that is used in the door lock in Figure 1; Prior art - sheet no I of 3 Figure 8 A is a pictorial view of the new actuator cam - sheet no. 2 of 3 Figure 8 B is a pictorial view of the new actuator cam shaft with cam and cam shaft manufactured as one component - sheet no. 2 of 3 Figure 9 is an enlarged detailed view of the existing door lock in Figure 1, Figure 2 and Figure 3 showing the operation of the new actuator cam - sheet no. 2 of 3 Figure 10 is a detailed view of the new cam plug - sheet no. 2 of 3 Figure 11 is a detailed view of the new threaded hollow tube - sheet no. 2 of Figures A, B, C. D and E shows a very detailed list of components that are named with respect to the installation diagram and instructions that will be included with each lever handle retrofit device. - sheet no. 3 of 3 Known Invention Description With reference to Figure 1 of the drawings, the reference numeral 10 refers generally to a door lock assembly suitable for use in a narrow stile such as an extruded metal door frame.
Assemblies of this type are well known and as previously indicated, one such assembly is described in Canadian Patent no. 1,016,975. The assembly includes afront casing no. 12 which has side walls no. 14 in each of which has a threaded passage no. 16 is formed. A
side wall slot no. 18 is formed in each side wall no. 14 and has dwell notches nos. 20 and 22 extending upwardly at opposite ends thereof. A locking bolt no. 24 is pivotally mounted on a pivot pin no. 26 which is retained by the side walls no. 14. A cylinder lock housing no.
110 has a threaded body portion no. 108 adapted to be threadedly mounted in either of the threaded passages no.16. Set screws no. 33 are threadedly mounted in threaded holes no.
35 and serve to extend into slots no. 112 formed in the tlireaded body portion no. 108 to retain the cylinder lock housing no. 110 against rotation.
As shown in Figure 2 of the drawings, the locking bolt no. 24 has an arcuate shaped slot no. 40 located at its inner end. A lever arm no. 42 has one end pivotally mounted on a pivot pin no. 44 so as to be movable back and forth in the direction of arrow B. A
fixed pin no.
46 is secured to the other end of the lever arm no. 42 and extends into the arcuate shaped slot no. 40. The lever arm no. 42 has a key-hole shaped slot no. 48 formed therein.
'The key-hole shaped slot no. 48 has within it an enlarged hole portion at its top end and a narrower elongated slot which makes up the rest of the key-hole shaped slot.
A pair of abutment posts nos. 50 and 52 are arranged one on either side of the key-hole shaped slot no. 48 and project from each side-face of the lever arm no. 42 toward the adjacent side wall no. 14 of the lock housing no.10. A latching pin no. 54 ( see Figure 5) has a central portion no. 56 of reduced diameter slidably mounted in the narrow elongated portion no. 48a of the key-hole shaped slot no. 48 with the enlarged spacer portions no. 58 located on opposite sides of the lever arm no. 42 such that the latching portions no. 60 project into the sidewall slots nos. 18 as shown in Figure 1.
'I'he enlarged hole portion no. 48 b of the key-hole shaped slot no. 48 is proportioned to permit the enlarged portions no. 58 of the latching pin no. 54 to be mounted in a manner illustrated in Figure 2. The inner end of the actuator shaft no. 106 has a rectangular shaped lug no. 70 ( see Figure 3 ) which projects into a corresponding rectangular shaped slot no.
72 in the actuator cam no. 74.
The actuator cam no.74 has a detent no. 76 which projects radially outward from the axis of rotation of no. 78. In order to unseat the latching pin no. 54 from the dwell notches nos. 20 and 22, the actuator cam no. 74 is rotated in the direction of arrow C. The upstreani abutment post no. 52 is out of the path of travel of the detent no. 76 with the result that the detent no. 76 can move to a point where it engages the latching pin no. 54 and continued rotation will displace the latching pin no. 54 in the direction of the arrow D, thus unseating the latching pin no. 54 from the sidewall dwell notches nos. 20 and 22.
Continued rotation of the acutator cam no. 74 in the direction of arrow C will bring the detent no. 76 into engagement with the abutment post no.50 at which time the lever arm no. 42 will begin to pivot in the direction of the arrow E about its axis of rotation no.
45.
Displacement of the lever arm no. 42 in the direction of the arrow E will cause the locking bolt no. 24 to move from the broken line stored position, shown in Figure 2, to the solid line locking position by reason of the interaction of the pivot pin no. 46 and arcuate shaped slot no.
40. When the lever arm no.42 is in the position shown in figure 2, the abutment post no. 50 is displaced out of the path of travel of the detent no. 76 with the result that the actuator cam no. 74 may continue its rotation in the direction of the arrow C until a 360 degree rotation has been completed to permit removal of the key. The mechanism described hereinabove is a known mechanism which includes appropriate biasing springs for spring loading the latching pin no.54.
improvement New Invention The improvement to the existing invention resides in the configuration of the cam plate no.
120 in Figure 8. The cam plate no. 120 is formed with a detent no. 123 which performs the same function as the detent no. 76 of the known cam plate no. 74. The cam plate no.
120 is however, formed with a raised key no. 122 which projects out from the face of the cam p/ate no. 120. The cam plate no. 120 has a mounting hole no.121 into which the actuator shaft no. 88 is placed and then welded to securely retain the cam plate no. 120 to the actuator shaft no. 88, thus becoming one complete part. As shown in Figure 9 of the drawings, rotation of the cam plate no. 120 in the direction of the arrow F
will cause the detent no. 123 to displace the latching pin no. 54 as previously described and engagement of the detent no. 123 with the abutment post no. 50 will cause the lever arm no.
42 to pivot in the direction of arrow E.
However, once the lever arm no. 42 has reached its second operating position, the raised key no.122 that is fitted into the key-hole shaped slot no. 48 will arrest any further movement of the actuator cam no. 120. because of the fact that the actuator cam no. 120 is limited in its path of travel due to its engagement in the key-hole shaped slot no. 48.
'I'he detent no. 123 will have displaced the latching pin and then and will be halted in any further rotation by the fact that it is captured within the key-hole shaped slot of the lever arm and will then come to rest on the inner edge of the abutment post no. 52, and thus limiting the angular displacement of the actuator cam no. 120 to less than 90 degrees.
The lever handle no.100 is mounted on the outer end of the actuator shaft no.
88 and at the opposite inner end of the actuator shaft no. 88 is a rounded lug which is mounted into a round shaped corresponding mounting hole no. 121, this is then welded so as to create one solid component. This one piece actuator shaft no. 88 and actuator cam no. 120 is formed with the result that the 90 degree movement of the actuator cam no. 120 can be achieved by displacing the lever handle no. 100 through 90 degrees. By reversing the direction of rotation of the lever handle no. 100, the actuator cam no.120 will be returned from the position shown in broken lines to the position shown in solid lines in Figure 9, as a result of which the latching pin no. 54 will be again displaced by engagement with the detent no. 123 and the rotation of the actuator cam no.120 will continue until the lever arm no. 42 has reached its limited path of travel. The raised key no. 122 which is captured in the key-hole shaped slot no. 48 and specifically engaged in the enlarged round hole portion no. 48b is limited to its path of travel and the detent no.123 comes to rest on the inner edge of the abutment post no. 50.
Thus, it will be seen that the improvement of the new invention resides in the provision of the raised cam no. 122 and the detent no.123.
Supplementary Disclosure There are two other components in the new invention which are quite unique and they are the threaded hollow tube no. 87 and the actuator cam housing no. 89. The threaded hollow tube no. 87 has two oval holes no. 85 strategically placed at the inner end of the threaded hollow tube no. 87 and these two oval holes no. 85 allow the two set screws no.33 to be screwed into their respective holes in the threaded hollow tube no.87 and this procedure then secures the threaded hollow tube no. 87 in the threaded passageways no.16. The two set screws no.33 prevent the threaded hollow tube no 87 from rotating in the lock.
The threaded hollow tube no. 87 is a one piece threaded hollow tube that allows the actuator shaft and cam assembly to be inserted into the door and the lock through the threaded hollow tube no. 87 and to engage the key-hole shaped slot no. 48 in the lever arm no. 42 and thus drive the lever arm no. 42 back and forth which in turn locks and unlocks the bolt no. 24. The actuator carn housing no. 89 is a solid disc shaped component that is flat on either face and is drilled with a round hole completely through its body. The actuator cam housing no. 89 slides into the tlireaded hollow tube no. 87 and at the same time the actuator cam housing no. 89 slides over and along the actuator shaft no. 88 and comes to rest against the back of the actuator cam no. 120. In this unique way of installing the components, the pieces can alI
fit together to perform the locking and unlocking function as required. The actuator cam housing no. 89 has a square hole no. 99 broached longitudinally in its length.
Within the same square hole no. 99 are additional broached squares. The square spindle no. 92 is then placed into the square hole no. 99 of the actuator shaft no. 88. The lever handle escutcheon plate no. 93 is then fastened to the door by mounting screws no.
97.
The components of the new invention allow for various types of exit devices to be installed with the new invention and for that reason the appropriate mounting hardware would be required for each individual installation. This supplementary disclosure also shows improvement in the new invention in the provision of the threaded hollow tube no. 87 and the actuator cam housing no. 89. The lever handle operated cam actuator of the new invention may be located on the inside face of the door, while a key operated lock may be located on the outside of the door. The key operated lock having a cam plate no. 74 of the type previously described with the result that it is possible to operate the locking bolt from the inside of the door by rotating the lever handle no._100 as previously described , it is necessary to utilize a key to obtain access from the outside of the door. Alternatively, where a security key lock is not required, a handle operated mechanism may be located on both sides of the door. In some instances a key access or handle access from the outside may not be required, but the door still may be required to be locked and in this case the lever handle would be required for exit as well as relocking the door from the inside.
The American Disabilities Act The Door Hardware Provisions to make public accommodations "readily accessible" to the disabled include the following:
"4.13.9" Door Hardware, handles, pulls, latches, locks and other operating devices on accessible doors shall have a shape that is easy to grasp with one hand and does not require tight pinching, or twisting of the wrist to operate.
Lever mechanisms, push type mechanisms, and U- shaped handles are acceptable designs. When sliding doors are fully open, operating hardware shall be exposed and usable from both sides. In dwelling units, only doors at accessible entrances to the unit itself shall comply with the requirements of this paragraph. Doors to hazardous areas shall have hardware complying with "4.29.3 ". No door hardware should be mounted for accessible door passage higher t.han 48 inches (1220 mm ) above the finished floor.
CANADA Design Standards 3.7.3 Doorways and Doors 3.7.3.3 Door operating devices shall be of a design which does not require tight grasping and twisting of the wrist as the only means of operation.
3.4.5.15. 3.3.1.12 Door Release Hardware Locking and, latching and other fastener devices on every exit door shall permit the door to be readily opened from the inside with not more than one releasing operation and without requiring keys, special devices or specialized knowledge of the door opening mechanism.
If a door is equipped with a latching mechanism, a device that will release the latch and allow the door to swing wide open when a force of not more than 90 N
(20 l.bs. ) is applied to the device in the direction of travel to the exit.
Prior Art The actuator member of the lock described in the Bradstock patent includes a conventional key operated rotor shaft which must be rotated through 360 degrees to permit removal of the key.
T'he actuator cam has a profile which includes a detent or cam extension which engages the latching pin which is slidably mounted in the lever arm to move the latching pin out of one or the other of the sidewall dwell notches, which are located at opposite ends of the actuator slot in which the latching pin moves in relation to the lock casing.
The cam extension or detent then engages the downstream abutment post which is carried by the lever arm to effect movement of the locking bolt between its open and closed positions.
The door locks of this type are commonly used in public commercial buildings and fire and handicap regulations in many jurisdictions provide that the doors to such buildings must be capable of being opened by operation of a handle which does not require dexterity on the part of the user to effect opening and closing of the lock. In case of a fire, the occupants attempting to escape a building may have their ability to locate a key in a lock impaired by the fuines generated by the fire or the inability to see the lock opening because of the smoke generated by fire.
Preferred Embodiments The invention will be more clearly understood after reference to the following detailed specifications read in conjunction with the drawings wherein;
Fizure 1 is a partially exploded side view of a door lock of the Adams Rite type known invention with a known keyed lock cylinder; Prior art - sheet no. 1 of 3 FiQure 2 is a sectional side view of the door lock of Figure 1; Prior art -sheet no. I of 3 Figure 3 is an enlarged detailed view of the known cam actuator plate of the known invention of Figure 1 and Figure 2: Prior art - sheet no. I of 3 Fizure 4 is an enlarged detailed view similar to Figure 3 showing the operation of the known actuator cam plate of the known invention in Figure 1 and Figure 2: Prior art -sheet no. 1 of 3 Fi ure S is a pictorial view of a known latching pin which is used in the door lock in Figure 1;
Prior art - sheet no I of 3 Figure 6 is a pictorial view of a known thumb turn cylinder that is used in the door lock in Figure 1; Prior art - sheet no. I of 3 FiQure 7 is a pictorial view of an known keyed mortise cylinder that is used in the door lock in Figure 1; Prior art - sheet no I of 3 Figure 8 A is a pictorial view of the new actuator cam - sheet no. 2 of 3 Figure 8 B is a pictorial view of the new actuator cam shaft with cam and cam shaft manufactured as one component - sheet no. 2 of 3 Figure 9 is an enlarged detailed view of the existing door lock in Figure 1, Figure 2 and Figure 3 showing the operation of the new actuator cam - sheet no. 2 of 3 Figure 10 is a detailed view of the new cam plug - sheet no. 2 of 3 Figure 11 is a detailed view of the new threaded hollow tube - sheet no. 2 of Figures A, B, C. D and E shows a very detailed list of components that are named with respect to the installation diagram and instructions that will be included with each lever handle retrofit device. - sheet no. 3 of 3 Known Invention Description With reference to Figure 1 of the drawings, the reference numeral 10 refers generally to a door lock assembly suitable for use in a narrow stile such as an extruded metal door frame.
Assemblies of this type are well known and as previously indicated, one such assembly is described in Canadian Patent no. 1,016,975. The assembly includes afront casing no. 12 which has side walls no. 14 in each of which has a threaded passage no. 16 is formed. A
side wall slot no. 18 is formed in each side wall no. 14 and has dwell notches nos. 20 and 22 extending upwardly at opposite ends thereof. A locking bolt no. 24 is pivotally mounted on a pivot pin no. 26 which is retained by the side walls no. 14. A cylinder lock housing no.
110 has a threaded body portion no. 108 adapted to be threadedly mounted in either of the threaded passages no.16. Set screws no. 33 are threadedly mounted in threaded holes no.
35 and serve to extend into slots no. 112 formed in the tlireaded body portion no. 108 to retain the cylinder lock housing no. 110 against rotation.
As shown in Figure 2 of the drawings, the locking bolt no. 24 has an arcuate shaped slot no. 40 located at its inner end. A lever arm no. 42 has one end pivotally mounted on a pivot pin no. 44 so as to be movable back and forth in the direction of arrow B. A
fixed pin no.
46 is secured to the other end of the lever arm no. 42 and extends into the arcuate shaped slot no. 40. The lever arm no. 42 has a key-hole shaped slot no. 48 formed therein.
'The key-hole shaped slot no. 48 has within it an enlarged hole portion at its top end and a narrower elongated slot which makes up the rest of the key-hole shaped slot.
A pair of abutment posts nos. 50 and 52 are arranged one on either side of the key-hole shaped slot no. 48 and project from each side-face of the lever arm no. 42 toward the adjacent side wall no. 14 of the lock housing no.10. A latching pin no. 54 ( see Figure 5) has a central portion no. 56 of reduced diameter slidably mounted in the narrow elongated portion no. 48a of the key-hole shaped slot no. 48 with the enlarged spacer portions no. 58 located on opposite sides of the lever arm no. 42 such that the latching portions no. 60 project into the sidewall slots nos. 18 as shown in Figure 1.
'I'he enlarged hole portion no. 48 b of the key-hole shaped slot no. 48 is proportioned to permit the enlarged portions no. 58 of the latching pin no. 54 to be mounted in a manner illustrated in Figure 2. The inner end of the actuator shaft no. 106 has a rectangular shaped lug no. 70 ( see Figure 3 ) which projects into a corresponding rectangular shaped slot no.
72 in the actuator cam no. 74.
The actuator cam no.74 has a detent no. 76 which projects radially outward from the axis of rotation of no. 78. In order to unseat the latching pin no. 54 from the dwell notches nos. 20 and 22, the actuator cam no. 74 is rotated in the direction of arrow C. The upstreani abutment post no. 52 is out of the path of travel of the detent no. 76 with the result that the detent no. 76 can move to a point where it engages the latching pin no. 54 and continued rotation will displace the latching pin no. 54 in the direction of the arrow D, thus unseating the latching pin no. 54 from the sidewall dwell notches nos. 20 and 22.
Continued rotation of the acutator cam no. 74 in the direction of arrow C will bring the detent no. 76 into engagement with the abutment post no.50 at which time the lever arm no. 42 will begin to pivot in the direction of the arrow E about its axis of rotation no.
45.
Displacement of the lever arm no. 42 in the direction of the arrow E will cause the locking bolt no. 24 to move from the broken line stored position, shown in Figure 2, to the solid line locking position by reason of the interaction of the pivot pin no. 46 and arcuate shaped slot no.
40. When the lever arm no.42 is in the position shown in figure 2, the abutment post no. 50 is displaced out of the path of travel of the detent no. 76 with the result that the actuator cam no. 74 may continue its rotation in the direction of the arrow C until a 360 degree rotation has been completed to permit removal of the key. The mechanism described hereinabove is a known mechanism which includes appropriate biasing springs for spring loading the latching pin no.54.
improvement New Invention The improvement to the existing invention resides in the configuration of the cam plate no.
120 in Figure 8. The cam plate no. 120 is formed with a detent no. 123 which performs the same function as the detent no. 76 of the known cam plate no. 74. The cam plate no.
120 is however, formed with a raised key no. 122 which projects out from the face of the cam p/ate no. 120. The cam plate no. 120 has a mounting hole no.121 into which the actuator shaft no. 88 is placed and then welded to securely retain the cam plate no. 120 to the actuator shaft no. 88, thus becoming one complete part. As shown in Figure 9 of the drawings, rotation of the cam plate no. 120 in the direction of the arrow F
will cause the detent no. 123 to displace the latching pin no. 54 as previously described and engagement of the detent no. 123 with the abutment post no. 50 will cause the lever arm no.
42 to pivot in the direction of arrow E.
However, once the lever arm no. 42 has reached its second operating position, the raised key no.122 that is fitted into the key-hole shaped slot no. 48 will arrest any further movement of the actuator cam no. 120. because of the fact that the actuator cam no. 120 is limited in its path of travel due to its engagement in the key-hole shaped slot no. 48.
'I'he detent no. 123 will have displaced the latching pin and then and will be halted in any further rotation by the fact that it is captured within the key-hole shaped slot of the lever arm and will then come to rest on the inner edge of the abutment post no. 52, and thus limiting the angular displacement of the actuator cam no. 120 to less than 90 degrees.
The lever handle no.100 is mounted on the outer end of the actuator shaft no.
88 and at the opposite inner end of the actuator shaft no. 88 is a rounded lug which is mounted into a round shaped corresponding mounting hole no. 121, this is then welded so as to create one solid component. This one piece actuator shaft no. 88 and actuator cam no. 120 is formed with the result that the 90 degree movement of the actuator cam no. 120 can be achieved by displacing the lever handle no. 100 through 90 degrees. By reversing the direction of rotation of the lever handle no. 100, the actuator cam no.120 will be returned from the position shown in broken lines to the position shown in solid lines in Figure 9, as a result of which the latching pin no. 54 will be again displaced by engagement with the detent no. 123 and the rotation of the actuator cam no.120 will continue until the lever arm no. 42 has reached its limited path of travel. The raised key no. 122 which is captured in the key-hole shaped slot no. 48 and specifically engaged in the enlarged round hole portion no. 48b is limited to its path of travel and the detent no.123 comes to rest on the inner edge of the abutment post no. 50.
Thus, it will be seen that the improvement of the new invention resides in the provision of the raised cam no. 122 and the detent no.123.
Supplementary Disclosure There are two other components in the new invention which are quite unique and they are the threaded hollow tube no. 87 and the actuator cam housing no. 89. The threaded hollow tube no. 87 has two oval holes no. 85 strategically placed at the inner end of the threaded hollow tube no. 87 and these two oval holes no. 85 allow the two set screws no.33 to be screwed into their respective holes in the threaded hollow tube no.87 and this procedure then secures the threaded hollow tube no. 87 in the threaded passageways no.16. The two set screws no.33 prevent the threaded hollow tube no 87 from rotating in the lock.
The threaded hollow tube no. 87 is a one piece threaded hollow tube that allows the actuator shaft and cam assembly to be inserted into the door and the lock through the threaded hollow tube no. 87 and to engage the key-hole shaped slot no. 48 in the lever arm no. 42 and thus drive the lever arm no. 42 back and forth which in turn locks and unlocks the bolt no. 24. The actuator carn housing no. 89 is a solid disc shaped component that is flat on either face and is drilled with a round hole completely through its body. The actuator cam housing no. 89 slides into the tlireaded hollow tube no. 87 and at the same time the actuator cam housing no. 89 slides over and along the actuator shaft no. 88 and comes to rest against the back of the actuator cam no. 120. In this unique way of installing the components, the pieces can alI
fit together to perform the locking and unlocking function as required. The actuator cam housing no. 89 has a square hole no. 99 broached longitudinally in its length.
Within the same square hole no. 99 are additional broached squares. The square spindle no. 92 is then placed into the square hole no. 99 of the actuator shaft no. 88. The lever handle escutcheon plate no. 93 is then fastened to the door by mounting screws no.
97.
The components of the new invention allow for various types of exit devices to be installed with the new invention and for that reason the appropriate mounting hardware would be required for each individual installation. This supplementary disclosure also shows improvement in the new invention in the provision of the threaded hollow tube no. 87 and the actuator cam housing no. 89. The lever handle operated cam actuator of the new invention may be located on the inside face of the door, while a key operated lock may be located on the outside of the door. The key operated lock having a cam plate no. 74 of the type previously described with the result that it is possible to operate the locking bolt from the inside of the door by rotating the lever handle no._100 as previously described , it is necessary to utilize a key to obtain access from the outside of the door. Alternatively, where a security key lock is not required, a handle operated mechanism may be located on both sides of the door. In some instances a key access or handle access from the outside may not be required, but the door still may be required to be locked and in this case the lever handle would be required for exit as well as relocking the door from the inside.
Claims (5)
1. In a door lock of the type having a rotatably mounted cam which has a detent which serves to displace a latching pin and to engage a downstream abutment post of a pair of abutment posts which are arranged upstream and downstream of a locking pin with respect to the direction of rotation of an actuator cam, the abutment posts being mounted on a lever arm which is connected to a locking bolt such that rotation of the actuator cam in one direction or the other will cause the detent to displace the locking pin and thereafter engage the downstream abutment post to effect movement of the lever arm which in turn effects movement of the locking bolt between an open position and a closed position and to move the downstream abutment post clear of the detent to gain access to the latching pin when the direction of rotation of the actuator cam is reversed, the improvement of, What I claim as my invention is:
1. A raised key on the flat face side of the cam plate so as to engage the key-hole shaped slot of the lever arm and particularly the enlarged hole portion on the key-hole shaped slot, the raised key engaged into the enlarged hole of the key-hole shaped slot limits the path of travel of the actuator cam and restricts the path of travel to less than 90 degrees.
Therefore the rotation of the lever handle which is mounted on the actuator shaft is subsequently restricted to a path of travel of less than 90 degrees.
Therefore the rotation of the lever handle which is mounted on the actuator shaft is subsequently restricted to a path of travel of less than 90 degrees.
2. An actuator cam for use in a door lock of the type having a detent for displacing a latching pin which is mounted on a lever arm which is connected to a locking bolt, the lever arm having abutment posts located one on either side of a path of travel along which the latching pin is movable, and a shaft mounted for rotation proximate the latching pin for supporting said actuator cam for angular movement about said axis, said abutment posts being positioned in an upstream and a downstream position with respect to one another relative to the direction of rotation of said actuator cam in use, said actuator cam comprising a cam body having an axis of rotation, a detent projecting radially from said axis of rotation and having a raised key formed on the face of the cam plate which said raised key fits into and engages the round hole enlarged portion of the key-hole shaped slot in the lever arm and drives said lever arm back and forth so as the bolt will follow its path of travel to complete the locking and unlocking cycles and come to rest in either the locked or unlocked positions. The actuator cam is restricted in any further movement by the fact that it is locked into the key-hole shaped slot and its path of travel is restricted by the limit of the lever arm in its back and forth positions.
3. An actuator assembly for use in a door lock of the type having a detent for displacing a latching pin along a path of travel, said latching pin being mounted on a lever arm which is connected to a locking bolt, the lever arm having abutment posts located one on either side of the path of travel of the latching pin and a shaft mounted for rotation proximate the latching pin, said actuator assembly comprising an actuator housing, an actuator shaft mounted for rotation in said housing, said actuator shaft having first and second ends at opposite ends of said actuator housing, a longitudinally elongated actuator lever handle having one end mounted on said first end of said actuator shaft, the longitudinal extent of said lever handle projecting radially from one side of said actuator shaft, an actuator cam mounted on said second end of said actuator shaft, said actuator cam having; an axis of rotation, a detent projecting radially from said axis of rotation and a raised key formed on the actuator cam and arranged so as to engage the key-hole shaped_slot and in particular the enlarged hole at the top of the keyhole shaped slot so as to drive the lever arm back and forth to the unlocked and locked positions of the bolt and to arrest the movement of the actuator cam after displacement of the latching pin by the detent such that the rotation of the actuator cam is restricted to less than 90 degrees.
4. The uniqueness of the actuator shaft housing being a two part assembly; one part being a threaded hollow tube open at both ends and having a raised stamped key on its inner surface of the tube arid two oval shaped holes on the side of the tube being strategically placed so as to accept the set screws, which prevents the cylinder from turning in the threaded passageways of the lock; the second part being an actuator shaft inner housing that is a solid disc shaped plug that is slidably mounted in the threaded hollow tube. There are two holes drilled in the solid flat disc shaped plug. The first round hole is drilled completely through the solid disc and a second hole is drilled part way through on the flat face of the disc.
The first hole is drilled completely through the disc and this hole accommodates the actuator shaft and holds it in the exact position that is required to turn on its axis back and forth when the handle is displaced in a locked or unlocked position. This second drilled hole is tapped to receive a threaded screw end of an installation and removal tool that is necessary to install these two components, the threaded hollow tube and the flat disc shaped plug into the door and the door lock.
The first hole is drilled completely through the disc and this hole accommodates the actuator shaft and holds it in the exact position that is required to turn on its axis back and forth when the handle is displaced in a locked or unlocked position. This second drilled hole is tapped to receive a threaded screw end of an installation and removal tool that is necessary to install these two components, the threaded hollow tube and the flat disc shaped plug into the door and the door lock.
5. The actuator shaft is unique by the fact that it has a square hole broached in it longitudinally and within that same hole are broached several other square broachings. The many different broached squares within the actuator cam shaft allow for many different mounting positions on the door. The lever handle or exit device has the appropriate square spindle installed in its housing. The lever handle or exit device square spindle is placed into the square hole of the actuator cam shaft at the desired position and desired angle for the door. The square actuator cam shaft allows the lever handle to be installed on doors of various thickness and at many different angles. The lever handle or exit device door plate or escutcheon is then fastened to the door by the appropriate screws. The internal components of the new invention allow for various types of exit devices to be installed in conjunction with those components. The various types of exit devices would be installed differently and the mounting technique would vary accordingly with each different installation.
The actuator cam and the actuator cam housing are installed as one unit in the lock housing with the newly designed installation / removal tool. The new tool is a flexible hollow tube with a square bar stock installed in the far end of the hollow tube.
The actuator cam is placed on the far end of the installation / removal tool and then placed inside the lock housing and engages the locking bar mechanism. The actuator cam housing is then placed on the installation / removal tool and is then slid up the hollow tube and into the lock housing were it then butts up against the actuator cam..
The newly engineered design of the new parts is more cost effective, easier to manufacture, much easier for installation, and allow for the precision manufacturing of parts.
The original threaded tube and the original actuator cam are still the preferred installation for unique door manufacturers such as Dynaflair and Teknion.
The actuator cam and the actuator cam housing are installed as one unit in the lock housing with the newly designed installation / removal tool. The new tool is a flexible hollow tube with a square bar stock installed in the far end of the hollow tube.
The actuator cam is placed on the far end of the installation / removal tool and then placed inside the lock housing and engages the locking bar mechanism. The actuator cam housing is then placed on the installation / removal tool and is then slid up the hollow tube and into the lock housing were it then butts up against the actuator cam..
The newly engineered design of the new parts is more cost effective, easier to manufacture, much easier for installation, and allow for the precision manufacturing of parts.
The original threaded tube and the original actuator cam are still the preferred installation for unique door manufacturers such as Dynaflair and Teknion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2575543A CA2575543C (en) | 2007-01-15 | 2007-01-15 | Handicap exit device retrofit kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2575543A CA2575543C (en) | 2007-01-15 | 2007-01-15 | Handicap exit device retrofit kit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2575543A1 true CA2575543A1 (en) | 2008-07-15 |
| CA2575543C CA2575543C (en) | 2021-11-02 |
Family
ID=39627549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2575543A Active CA2575543C (en) | 2007-01-15 | 2007-01-15 | Handicap exit device retrofit kit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2575543C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113056137A (en) * | 2021-03-18 | 2021-06-29 | 杨群 | Control cabinet with anti-theft mechanism for smart power grid |
-
2007
- 2007-01-15 CA CA2575543A patent/CA2575543C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113056137A (en) * | 2021-03-18 | 2021-06-29 | 杨群 | Control cabinet with anti-theft mechanism for smart power grid |
| CN113056137B (en) * | 2021-03-18 | 2022-12-20 | 广西电网有限责任公司防城港供电局 | Control cabinet with anti-theft mechanism for smart power grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2575543C (en) | 2021-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20130115 |
|
| FZDE | Discontinued |
Effective date: 20170116 |
|
| FZDC | Discontinued application reinstated |
Effective date: 20170321 |