Description:LOCK ARRANGEMENT AND METHOD OF ASSEMBLY THEREFOR

FIELD OF THE PRESENT DISCLOSURE
[0001] The present disclosure relates generally to lock assemblies and, more particularly, to a rim lock assembly with an improved arrangement for aligning and mounting the lock components on a door.

BACKGROUND
[0002] Rim lock assemblies are commonly used for locking doors in residential, commercial, and industrial settings. These lock assemblies typically comprise a lock body mounted on the interior side of the door and a rose assembly mounted on the exterior side of the door. The lock body houses the locking mechanism, which includes components such as a locking bolt, a latch, and a latch rod. The rose assembly extends through a central bore in the door and is operatively connected to the locking mechanism, allowing for actuation of the locking components from the exterior side of the door.
[0003] A significant challenge with conventional rim lock assemblies is the potential misalignment between the lock body and the rose assembly. This misalignment can occur due to various factors, including manufacturing tolerances, variations in door thickness, and improper installation procedures. When the lock body and the rose assembly are not precisely aligned, it can lead to several issues. Firstly, the locking mechanism may not function smoothly, resulting in binding, sticking, or even failure to engage or disengage the locking components properly. Secondly, the misalignment can make it difficult to mount and install the lock components on the door, leading to frustration and potential damage during the installation process.
[0004] Manufacturers and installers have attempted to address these alignment issues through various conventional solutions. One approach involves using shims or spacers to adjust the positioning of the lock body or the rose assembly during installation. However, this method can be time-consuming and may not always result in optimal alignment, as it relies heavily on the skill and expertise of the installer. Another solution involves using adjustable mounting brackets or adapters, which allow for some degree of adjustment and alignment. However, these components add complexity and additional costs to the lock assembly.
[0005] While the conventional solutions mentioned above may provide some relief, they often fall short in achieving precise and consistent alignment between the lock body and the rose assembly. Misalignment issues can persist, leading to ongoing problems with the smooth operation of the locking mechanism and potential premature wear or damage to the lock components. Additionally, the installation process may remain cumbersome and prone to errors, particularly for inexperienced installers or in situations where access or visibility is limited.
[0006] The present invention aims to address these limitations by introducing a novel rose mounting plate that ensures precise coaxial alignment between the lock body and the rose assembly, thereby facilitating smooth operation of the locking mechanism and ease of installation.

OBJECTIVE
[0007] The objective of the present disclosure is to provide an improved rim lock assembly design that addresses the fundamental issue of misalignment between the lock body and the rose assembly. Such an improved design ensures precise and consistent alignment, facilitates smooth operation of the locking mechanism, and simplifies the installation process. By addressing these concerns, the lock assembly provides enhanced reliability, durability, and user satisfaction, addressing the limitations of conventional solutions and meeting the evolving demands of the market.

SUMMARY
[0008] In one aspect, the present invention provides a lock arrangement comprising a lock body providing a locking mechanism, where the lock body is configured to attach to an interior side of a door. The lock arrangement further comprises a rose assembly configured to attach to an exterior side of the door, wherein the rose assembly extends through a central bore extending through the door to be operatively connected to the locking mechanism. Additionally, the lock arrangement includes a rose mounting plate configured to attach to the interior side of the door. The rose mounting plate is configured to provide a tight tolerance fit within an inner cavity of the lock body from all peripheral sides, allowing for coaxial alignment between the lock body and the rose assembly when assembled.
[0009] In some embodiments, the rose mounting plate comprises a peripheral shape and dimensions complementary to the inner cavity of the lock body, to provide the tight tolerance fit with the inner cavity of the lock body.
[0010] In some embodiments, the rose mounting plate is formed as a separate component from the lock body and the rose assembly, enabling retrofitting of the rose mounting plate to existing lock assemblies.
[0011] In some embodiments, the lock body and the rose assembly are adapted for mounting on a rim of the door, with the lock body positioned on the interior side of the door and the rose assembly positioned on the exterior side of the door.
[0012] In some embodiments, the locking mechanism comprises a locking bolt slidably mounted within the lock body and movable between a locked position and an unlocked position, a latch pivotally mounted within the lock body and operatively coupled to the locking bolt, and a latch rod operatively connecting the latch to the rose assembly for actuating the locking bolt and the latch.
[0013] In some embodiments, the lock arrangement further comprises a knob assembly rotatably coupled to the rose assembly, wherein rotation of the knob assembly actuates the latch rod to control the locking bolt and the latch.
[0014] In some embodiments, the lock arrangement further comprises a patta mounted within the lock body and operatively coupled to the locking bolt, wherein the patta provides a latching surface to secure the locking bolt in the locked position.
[0015] In another aspect, the present invention provides a method of assembling a lock arrangement on a door. The method comprises mounting a rose mounting plate to an interior side of the door, attaching a lock body providing a locking mechanism to the interior side of the door, such that the rose mounting plate engages with an inner cavity of the lock body to provide a tight tolerance fit with the inner cavity from all peripheral sides, and attaching a rose assembly to an exterior side of the door, with the rose assembly extending through a central bore in the door to operatively connect to the locking mechanism, wherein the rose mounting plate, the lock body, and the rose assembly are aligned coaxially based on the tight tolerance fit.
[0016] In some embodiments, engaging the rose mounting plate into the inner cavity comprises positioning the rose mounting plate, with a peripheral shape and dimensions complementary to the inner cavity of the lock body, to insert the lock body thereon, to achieve the tight tolerance fit.
[0017] In some embodiments, after aligning the rose mounting plate, the lock body, and the rose assembly, the method further comprises securing a locking bolt of the locking mechanism using a patta mounted within the lock body, wherein the patta provides a latching surface for engaging the locking bolt.
[0018] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE FIGURES
[0019] For a more complete understanding of example embodiments of the present disclosure, reference is now made to the following descriptions taken in connection with the accompanying drawings in which:
[0020] FIG. 1 illustrates a diagrammatic perspective view representation of a lock arrangement, in accordance with one or more embodiments of the present disclosure;
[0021] FIG. 2 illustrates a diagrammatic planar view representation of the lock arrangement, in accordance with one or more embodiments of the present disclosure;
[0022] FIG. 3 illustrates a cross-section view representation of the lock arrangement along a section BB of FIG. 2, in accordance with one or more embodiments of the present disclosure;
[0023] FIG. 4 illustrates a cross-section view representation of the lock arrangement along a section CC of FIG. 2, in accordance with one or more embodiments of the present disclosure;
[0024] FIG. 5 illustrates a diagrammatic exploded view representation of the lock arrangement, in accordance with one or more embodiments of the present disclosure;
[0025] FIG. 6 illustrates a diagrammatic perspective view representation of a rose mounting plate of the lock arrangement, in accordance with one or more embodiments of the present disclosure;
[0026] FIG. 7 illustrates a diagrammatic front planar view representation of the rose mounting plate showing dimensions thereof, in accordance with one or more embodiments of the present disclosure;
[0027] FIG. 8 illustrates a diagrammatic side planar view representation of the rose mounting plate showing dimensions thereof, in accordance with one or more embodiments of the present disclosure; and
[0028] FIG. 9 illustrates a flowchart of a method of assembling the lock arrangement on a door, in accordance with one or more embodiments of the present disclosure.

DETAILED DESCRIPTION
[0029] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent, however, to one skilled in the art that the present disclosure is not limited to these specific details.
[0030] Reference in this specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. The appearance of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Further, the terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items. Moreover, various features are described which may be exhibited by some embodiments and not by others. Similarly, various requirements are described which may be requirements for some embodiments but not for other embodiments.
[0031] The terminology used in the description presented herein is intended to be interpreted in its broadest reasonable manner, even though it is being used in conjunction with a detailed description of certain specific examples of the invention. Certain terms may even be emphasized below; however, any terminology intended to be interpreted in any restricted manner will be overtly and specifically defined as such in this description below.
[0032] Furthermore, in the following detailed description of the present disclosure, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it will be understood that the present disclosure may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present disclosure.
[0033] Referring to FIGS. 1-5 in combination, illustrated is a lock arrangement (as represented by reference numeral 100), in accordance with one or more embodiments of the present disclosure. The lock arrangement 100 is designed to address the issues of misalignment and improper functioning commonly encountered in conventional rim lock assemblies. The lock arrangement 100 provides a configuration that ensures precise coaxial alignment between its components, thereby facilitating smooth operation of the locking mechanism and ease of installation. The lock arrangement 100 is particularly well-suited for door locking applications, where it can be mounted on the rim of a door (as represented by reference numeral 10 in the accompanied drawings), with a portion of the arrangement positioned on an interior side 12 of the door 10 and another portion positioned on an exterior side 14 of the door 10.
[0034] As illustrated, the lock arrangement 100 includes a lock body 102 providing a locking mechanism. The lock body 102 is configured to attach to the interior side 12 of the door 10. The locking mechanism housed within the lock body 102 comprises various components that facilitate the locking and unlocking operation of the lock arrangement 100. The lock arrangement 100 further includes a rose assembly 104 configured to attach to the exterior side 14 of the door 10. The rose assembly 104 extends through a central bore 16 in the door 10 to operatively connect to the locking mechanism within the lock body 102. This connection enables actuation of the locking mechanism from the exterior side 14 of the door 10 via the rose assembly 104. The lock arrangement 100 further includes a rose mounting plate 106 configured to attach to the interior side 12 of the door 10. The rose mounting plate 106 is designed to provide a tight tolerance fit within an inner cavity 108 of the lock body 102 from all peripheral sides. This tight tolerance fit is achieved by the rose mounting plate 106 having a peripheral shape and dimensions complementary to the inner cavity 108 of the lock body 102.
[0035] The rose mounting plate 106 is the key component of the lock arrangement 100, designed to enhance the structural integrity and operational efficiency of the entire assembly. In the context of the lock arrangement 100, the rose mounting plate 106 is configured to achieve the tight tolerance fit within the inner cavity 108 of the lock body 102. This configuration maintains the coaxial alignment between the lock body 102 and the rose assembly 104, upon assembly. For this purpose, the peripheral dimensions of the rose mounting plate 106 are precisely machined to complement the inner cavity 108 of the lock body 102. The tight tolerance fit is achieved by engineering the dimensions of the rose mounting plate 106 and the inner cavity 108 to match with minimal clearance, allowing only enough space for assembly without permitting significant movement post-installation. This ensures that when the rose mounting plate 106 is installed within the lock body 102, the peripheral sides of the rose mounting plate 106 are in close contact with the corresponding surfaces of the inner cavity 108, and such close contact minimizes any lateral or axial play that could disrupt the alignment of the components.
[0036] Also, as illustrated, the lock body 102 houses components of the locking mechanism components that enable the locking and unlocking functionality of the lock arrangement 100. These components include a locking bolt 110 that is slidably mounted within the lock body 102 and movable between a locked position and an unlocked position. The locking mechanism further comprises a latch 112 that is pivotally mounted within the lock body 102 and operatively coupled to the locking bolt 110. To facilitate actuation of the locking bolt 110 and the latch 112 from the exterior side 14 of the door 10, the lock arrangement 100 incorporates a latch rod 114. The latch rod 114 operatively connects the latch 112 to the rose assembly 104, allowing for the locking bolt 110 and the latch 112 to be actuated by manipulating the rose assembly 104 from the exterior side 14 of the door 10. The pivotal nature of the latch 112 allows for a controlled and smooth transition of the locking bolt 110, thereby enabling a secure locking action when activated.
[0037] Further, as illustrated, the rose assembly 104 includes a rose cap 116. The rose cap 116, as part of the rose assembly 104, serves as the primary user interface for the lock arrangement 100. The rose cap 116 is the visible portion of the rose assembly 104 on the exterior side 14 of the door 10, providing a surface for user interaction and actuation of the locking mechanism. Positioned on the exterior side 14 of the door 10, the rose cap 116 provides the necessary tactile and visual cues required for user interaction, which are essential for engaging the locking mechanism. The design and placement of the rose cap 116 are strategically considered to ensure that it not only complements the aesthetic aspects of the door but also aligns with the functional requirements of the locking mechanism.
[0038] In some embodiments, the lock arrangement 100 further includes a knob assembly 118 rotatably coupled to the rose assembly 104. The knob assembly 118 may include a larger knob and a smaller knob, and rotation of either knob actuates the latch rod 114 to control the locking bolt 110 and the latch 112. Additionally, the lock arrangement may include a patta 120 mounted within the lock body 102 and operatively coupled to the locking bolt 110. The patta 120 provides a latching surface to secure the locking bolt 110 in the locked position, ensuring a secure locking mechanism.
[0039] In the present embodiments, the rose mounting plate 106 helps in maintaining the integrity of the lock arrangement 100. As discussed, the rose mounting plate 106 is designed to provide a tight tolerance fit within the inner cavity 108 of the lock body 102. This precise fitting ensures that the rose assembly 104 and the lock body 102 remain in coaxial alignment, thereby optimizing the operational functionality of the lock arrangement 100. The rose mounting plate 106 is configured with peripheral shapes and dimensions that are complementary to the inner cavity 108 for achieving the intended fit. The specific dimensions and shape of the rose mounting plate 106, as depicted in FIGS. 6-8, enable it to integrate with the lock body 102, effectively eliminating any potential for misalignment that could impair performance of the lock arrangement 100.
[0040] The incorporation of the rose mounting plate 106 results in coaxial alignment between the lock body 102 and the rose assembly 104. As used herein, “coaxial alignment” refers to the arrangement wherein the centre axes of the rose mounting plate 106, the lock body 102, and the rose assembly 104 are aligned along a single straight line. This alignment ensures that the operational movements of the rose assembly 104, such as the turning of a handle or knob, are directly and efficiently transmitted to the locking mechanism within the lock body 102. By maintaining this alignment, the lock arrangement 100 can operate smoothly and reliably, as the mechanical linkages within the system, including the latch rod 114, function without misalignment-induced friction or resistance.
[0041] The coaxial alignment facilitated by the rose mounting plate 106 provides a mechanical feature that has implications for the functionality of the lock arrangement 100. By ensuring that the rose assembly 104 and the lock body 102 are perfectly aligned, the lock arrangement 100 achieves several operational efficiencies and user experience improvements. Primarily, the precise alignment simplifies the assembly process. When components such as the rose assembly 104 and the lock body 102 are aligned coaxially, it reduces the effort required to fit these parts together during both initial installations and maintenance activities. This speeds up the assembly process and reduces the risk of incorrect assembly, which could potentially lead to further complications or the need for reassembly. Moreover, the alignment significantly minimizes wear and tear on the moving parts of the lock arrangement 100; as in lock systems, misalignment can lead to uneven forces being applied to various parts of the mechanism, causing accelerated wear and increasing the likelihood of breakdowns. In general, the mechanical feature of coaxial alignment facilitated by the rose mounting plate 106 simplifies assembly, enhances durability, reduces the potential for mechanical failure, and improves user interaction.
[0042] In an embodiment, the rose mounting plate 106 is formed as a separate component from the lock body 102 and the rose assembly 104. This configuration enables retrofitting of the rose mounting plate 106 to existing lock assemblies, providing an opportunity to improve the alignment and performance of existing installations. The ability to retrofit the rose mounting plate 106 into existing lock systems provides a practical solution for enhancing the alignment and operational efficiency of older lock assemblies that may be suffering from alignment issues due to wear, initial mis-installation, or design limitations. By integrating the rose mounting plate 106, these existing assemblies can benefit from the improved coaxial alignment between the lock body 102 and the rose assembly 104, as provided by the tight tolerance fit of the rose mounting plate 106 within the inner cavity 108 of the lock body 102.
[0043] In an embodiment, the lock arrangement 100 is configured as a rim door lock, a type commonly implemented in various locking applications. This particular design involves the placement of the lock body 102 and the rose assembly 104 on opposite sides of the door 10. Specifically, the lock body 102 is mounted on the interior side 12 of the door 10, while the rose assembly 104 is positioned on the exterior side 14 of the door 10. The placement of the lock body 102 on the interior side 12 of the door 10 allows for direct access and control over the locking mechanism from inside the premises, providing a primary security function. Further, the placement of the rose assembly 104 on the exterior side 14 of the door 10 facilitates user access from outside, allowing the lock to be operated using a key, knob, or handle depending on the specific design of the rose assembly 104. However, it may be appreciated that the lock arrangement 100 of the present disclosure may be implemented with other known types of lock assemblies, including, but not limited to, night latch, tribolt, etc. without departing from the spirit and the scope of the present disclosure.
[0044] The present invention also provides a method of assembling the lock arrangement on a door. FIG. 9 illustrates a flowchart listing steps involved in a method (as represented by reference numeral 900) of assembling the lock arrangement 100 on the door 10, in accordance with one or more embodiments of the present disclosure. These steps are only illustrative, and other alternatives can also be provided where one or more steps are added, one or more steps are removed, or one or more steps are provided in a different sequence without departing from the scope of the claims herein. Various aspects and variants disclosed above, for the aforementioned lock arrangement 100 apply mutatis mutandis to the method 700, as discussed in the proceeding paragraphs.
[0045] At step 902, the method 900 involves mounting the rose mounting plate 106 to the interior side 12 of the door 10. The rose mounting plate 106 is aligned and secured to ensure proper orientation and positioning relative to the door 10. This positions the rose mounting plate 106 on the interior surface of the door 10, preparing it for subsequent engagement with the lock body 102. At step 904, the method 900 involves attaching the lock body 102, providing the locking mechanism, to the interior side 12 of the door 10. Herein, the lock body 102 is positioned such that the rose mounting plate 106, already mounted on the interior side 12, engages with the inner cavity 108 of the lock body 102. This engagement creates the tight tolerance fit between the rose mounting plate 106 and the inner cavity 108 from all peripheral sides. The precise complementary shape and dimensions of the rose mounting plate 106 and the inner cavity 108 facilitate this tight tolerance fit.
[0046] At step 906, the method 900 involves attaching the rose assembly 104 to the exterior side 14 of the door 10. Herein, the rose assembly 104 extends through the central bore 16 in the door 10 to operatively connect to the locking mechanism housed within the lock body 102. The operative connection between the rose assembly 104 and the locking mechanism is achieved through the latch rod 114, which connects the rose assembly 104 to the latch 112 within the lock body 102. This connection allows for actuation of the locking bolt 110 and the latch 112 from the exterior side 14 of the door 10 via the rose assembly 104. During this step, the tight tolerance fit between the rose mounting plate 106 and the lock body 102 ensures that the rose mounting plate 106, the lock body 102, and the rose assembly 104 are aligned coaxially, facilitating smooth and precise interaction between these components.
[0047] In the present embodiments, during the engagement of the rose mounting plate 106 into the inner cavity 108 of the lock body 102, the method 900 involves positioning the rose mounting plate 106 such that its peripheral shape and dimensions are complementary to the inner cavity 108. This complementary fit ensures that when the lock body 102 is inserted onto the rose mounting plate 106, the tight tolerance fit is achieved between the two components from all peripheral sides. Further, after successful alignment of the rose mounting plate 106, the lock body 102, and the rose assembly 104, an additional step may be performed to secure the locking bolt 110 of the locking mechanism in the locked position. This is accomplished by utilizing the patta 120 mounted within the lock body 102. The patta 120 provides a latching surface specifically designed to engage and secure the locking bolt 110 in its locked position. By engaging the latching surface of the patta 120 with the locking bolt 110, the lock arrangement 100 can be secured, ensuring the integrity of the locking mechanism.
[0048] The lock arrangement 100 of the present invention introduces a significant and novel approach to addressing the long-standing issue of misalignment between the lock body 102 and the rose assembly 104 in rim lock arrangements. The incorporation of the rose mounting plate 106, designed to provide a tight tolerance fit within the inner cavity 108 of the lock body 102 from all peripheral sides, represents a pioneering solution that ensures precise coaxial alignment between these components when assembled. A key differentiating aspect of the lock arrangement 100 is the unique design of the rose mounting plate 106 to extend all the way and match the dimensions of the inner cavity 108 within the lock body 102. This is in contrast to prior art rim lock assemblies, where the rose mounting plate does not fully extend or match the dimensions of the corresponding cavity in the lock body, leading to potential misalignment issues.
[0049] The present invention addresses this limitation by designing the rose mounting plate 106 with a peripheral shape and dimensions that are complementary to the inner cavity 108 of the lock body 102. By achieving the tight tolerance fit and coaxial alignment, the lock arrangement 100 provides advantages over conventional rim lock assemblies. Firstly, the precise alignment between the lock body 102 and the rose assembly 104 facilitates smooth operation of the locking mechanism, which includes the locking bolt 110, the latch 112, and the latch rod 114, eliminating issues such as binding, sticking, or improper engagement of these locking components. This results in improved reliability and longevity of the lock arrangement 100. Secondly, the tight tolerance fit between the rose mounting plate 106 and the inner cavity 108 of the lock body 102 simplifies the installation process, as these components are designed to align seamlessly, reducing the need for complex adjustments or specialized installation techniques.
[0050] Moreover, the rose mounting plate 106 is designed as a separate component from the lock body 102 and the rose assembly 104, enabling retrofitting of the rose mounting plate 106 to existing lock assemblies. This adaptability allows for the benefits of the present invention to be realized in both new installations and existing setups, providing a cost-effective solution for enhancing the performance and functionality of legacy lock systems. By addressing the fundamental issue of misalignment and offering a practical solution, the lock arrangement 100 represents a significant advancement in the field of rim lock assemblies, setting new standards for reliability, ease of installation, and overall user satisfaction.
[0051] The foregoing descriptions of specific embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiment was chosen and described in order to best explain the principles of the present disclosure and its practical application, to thereby enable others skilled in the art to best utilize the present disclosure and various embodiments with various modifications as are suited to the particular use contemplated. , Claims:WE CLAIM:
1. A lock arrangement comprising:
a lock body providing a locking mechanism, the lock body configured to attach to an interior side of a door;
a rose assembly configured to attach to an exterior side of the door, the rose assembly extending through a central bore extending through the door to be operatively connected to the locking mechanism; and
a rose mounting plate configured to attach to the interior side of the door,
wherein the rose mounting plate is configured to provide a tight tolerance fit within an inner cavity of the lock body from all peripheral sides, to allow for coaxial alignment between the lock body and the rose assembly when assembled.

2. The lock arrangement as claimed in claim 1, wherein the rose mounting plate comprises a peripheral shape and dimensions complementary to the inner cavity of the lock body, to provide the tight tolerance fit with the inner cavity of the lock body.

3. The lock arrangement as claimed in claim 1, wherein the rose mounting plate is formed as a separate component from the lock body and the rose assembly, enabling retrofitting of the rose mounting plate to existing lock assemblies.

4. The lock arrangement as claimed in claim 1, wherein the lock body and the rose assembly are adapted for mounting on a rim of the door, with the lock body positioned on the interior side of the door and the rose assembly positioned on the exterior side of the door.

5. The lock arrangement as claimed in claim 1, wherein the locking mechanism comprises:
a locking bolt slidably mounted within the lock body and movable between a locked position and an unlocked position;
a latch pivotally mounted within the lock body and operatively coupled to the locking bolt; and
a latch rod operatively connecting the latch to the rose assembly for actuating the locking bolt and the latch.

6. The lock arrangement as claimed in claim 5, further comprising a knob assembly rotatably coupled to the rose assembly, wherein rotation of the knob assembly actuates the latch rod to control the locking bolt and the latch.

7. The lock arrangement as claimed in claim 5, further comprising a patta mounted within the lock body and operatively coupled to the locking bolt, wherein the patta provides a latching surface to secure the locking bolt in the locked position.

8. A method of assembling a lock arrangement on a door, the method comprising:
mounting a rose mounting plate to an interior side of the door;
attaching a lock body providing a locking mechanism to the interior side of the door, such that the rose mounting plate engages with an inner cavity of the lock body to provide a tight tolerance fit with the inner cavity from all peripheral sides; and
attaching a rose assembly to an exterior side of the door, with the rose assembly extending through a central bore in the door to operatively connect to the locking mechanism, wherein the rose mounting plate, the lock body, and the rose assembly are aligned coaxially based on the tight tolerance fit.

9. The method as claimed in claim 8, wherein engaging the rose mounting plate into the inner cavity comprises positioning the rose mounting plate, with a peripheral shape and dimensions complementary to the inner cavity of the lock body, to insert the lock body thereon, to achieve the tight tolerance fit.

10. The method as claimed in claim 8, further comprising, after aligning the rose mounting plate, the lock body, and the rose assembly, securing a locking bolt of the locking mechanism using a patta mounted within the lock body, wherein the patta provides a latching surface for engaging the locking bolt.