Description:[0001] The present application claims no priority from any of the patent application(s).
FIELD OF INVENTION
[0002] The present invention relates to the field of a primer seating arrangement for a breech mechanism. More particularly, the present invention relates to a double taper type of primer seating mechanism used to accommodate a primer.
BACKGROUND OF THE INVENTION
[0003] This section is intended to introduce the reader to various aspects of art, which may be related to various aspects of the present disclosure that are described or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements in this background section are to be read in this light, and not as admissions of prior art. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also correspond to implementations of the claimed technology.
[0004] A primer seating mechanism in a projectile launching system is well known in the art. Generally, the primer seating mechanism provides a seating space to hold the primer. The primer is placed inside the seating space using primer feeding mechanism in order to ignite a charge in a barrel of the projectile launching system. The seating space is designed with respect to the purpose of installation and extraction of the primer. Also, the primer is provided with a collar portion at the edge, so that the primer seated on the primer seating mechanism is extracted by using an ejecting mechanism.
[0005] In general, the primer is fed into the primer seating mechanism to ignite the charge in the barrel, thus it faces tremendous amount of heat during the combustion. The feeding operation of the primer into the barrel with higher force causes plastic deformation of end portion of the primer body facing the charge. In some instances, the heating phenomenon and the exhaust gases after combustion leads to bursting of the primer body due to pressure. The plastic deformation of the primer causes sticking of the primer body to the inner periphery of the primer seating space. In some cases, the collar portion of the primer breaks off during the extraction process of the primer. Also, the bursting of the primer body damages the inner periphery of the seating space which can lead to increase maintenance cost. Sometimes, the misalignment of the primer magazine with respect to the seating space leads to failure in primer feeding operation. This improper feeding causes bending or breaking of the primer body during feeding operation.
[0006] Certain present-day primer seating mechanism has a cylindrical shape along with a single tapered profile. The single tapered profile may positively hold the primer within the seating space. However, this arrangement fails to eliminate the plastic deformation problem which can lead to sticking of the primer within the seating space. Thus, the process of extraction of the primer from the seating space remains difficult. It also fails to reduce the breaking of the collar part of the primer during the extraction. Additionally, bending or breaking of the primer due to misalignment of the primer magazine is not addressed by the primer seating mechanism with cylindrical shape and single tapered profile. Also, the single tapered profiles fail to properly hold of the primer during high intensity shocks.
[0007] In light of the above stated discussion, there exists a need of an improved primer seating mechanism to overcome at least one of the above stated disadvantages.
SUMMARY OF THE INVENTION
[0008] Before the present system (or apparatus) and method, and its components are described, it is to be understood that this disclosure is not limited to the system and its arrangement as described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the versions or embodiments only and is not intended to limit the scope of the present application. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in detecting or limiting the scope of the claimed subject matter.
[0009] In one non-limiting embodiment, a primer seating arrangement for a breech assembly is disclosed. The primer seating arrangement discloses a spindle with an spindle bore. Further, an extractor is disclosed. In addition, a first tapered profile of the spindle bore of the spindle is disclosed. Moreover, a second tapered profile of the spindle bore of the spindle is disclosed. Also, the first tapered profile and the second tapered profile forms a double tapered seating arrangement.
[0010] In an embodiment, a primer may be configured to seat inside the spindle bore of the spindle. In addition, one end of the primer may include a collar. Further, the collar may be configured to seat above the spindle bore and upon the extractor. Furthermore, the primer may include a truncated cone body.
[0011] In another embodiment, the first tapered profile of the spindle bore may include a profile with decreasing diameter from opening end to bottom end.
[0012] In yet another embodiment, the second tapered profile of the spindle bore may include a profile with decreasing diameter from bottom end to bottom most end.
[0013] In yet another embodiment, the diameter of the opening end of the first tapered profile may be larger than the maximum diameter (dmax) of the truncated cone primer.
[0014] In yet another embodiment, the larger diameter of the opening end of the first tapered profile may facilitate proper feeding of the primer regardless the improper alignment of a magazine.
[0015] In yet another embodiment, shape of the first tapered profile may smoothly accommodate the primer. Further, shape of the second tapered profile may firmly hold the primer.
[0016] In yet another embodiment, shape of the double tapered seating arrangement may eliminate plastic deformation of the primer during primer feeding.
[0017] In yet another embodiment, the extractor may be an ejection mechanism configured to remove the primer from the spindle bore. In addition, the extractor may be pivotally affixed to the spindle. Further, shape of the double tapered seating arrangement may enable smooth extraction of the primer from the spindle bore.
[0018] In yet another embodiment, the primer may be fed into the spindle bore of the spindle from the magazine by a primer feeding mechanism.
BRIEF DESCRIPTION OF DRAWINGS
[0019] Having thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
[0020] Figure 1 illustrates a breech assembly (100), in accordance with various embodiment of the present subject matter;
[0021] Figure 2 illustrates a primer seating arrangement (102) of a breech assembly (100), in accordance with various embodiment of the present subject matter;
[0022] Figure 3 illustrates a sectional view (102a) of a primer seating arrangement (102), in accordance with various embodiment of the present subject matter; and
[0023] Figure 4 illustrates a primer seating arrangement (102) along with primer (108) and extractor (112), in accordance with various embodiment of the present subject matter.
[0024] It should be noted that the accompanying figures are intended to present illustrations of exemplary embodiments of the present disclosure. These figures are not intended to limit the scope of the present disclosure.
DETAILED DESCRIPTION
[0025] Reference throughout the specification to “various embodiments,” “some embodiments,” “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. Thus, appearances of the phrases “in various embodiments,” “in some embodiments,” “in one embodiment,” or “in an embodiment” in places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
[0026] The words "comprising," "having," "includes," "comprises," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items. It must also be noted that, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. For example, the term “an article” may include a plurality of articles unless the context clearly dictates otherwise. Although any methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary methods are described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0027] Various modifications to the embodiment may be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art may readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein. The detailed description of the invention will be described hereinafter referring to accompanied drawings.
[0028] As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure. Further, the terms and phrases used herein are not intended to be limiting but rather to provide an understandable description of the invention.
[0029] Those with ordinary skill in the art will appreciate that the elements in the figures are illustrated for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated, relative to other elements, in order to improve the understanding of the present invention. There may be additional components described in the foregoing application that are not depicted on one of the described drawings. In the event such a component is described, but not depicted in a drawing, the absence of such a drawing should not be considered as an omission of such design from the specification.
[0030] In the accompanying drawings components have been represented, showing only specific details that are pertinent for an understanding of the present invention so as not to obscure the disclosure with details that will be readily apparent to those with ordinary skill in the art having the benefit of the description herein.
[0031] In accordance with an embodiment of the present subject matter, referring to figures 1-4, a primer seating arrangement (102) for a breech assembly (100) is described herein.
[0032] In a non-limiting embodiment, a primer seating arrangement (102) for a breech assembly (100) is disclosed. The primer seating arrangement (102) includes a spindle (104), a primer (108), a collar (110) provided on the primer (108), an spindle bore (106) within the spindle (104), and an extractor (112). Further, the primer (108) is configured to seat inside the spindle bore (106) of the spindle (104). Further, the collar (110) of the primer (108) is configured to seat above the spindle bore (106) and upon an extractor (112). Furthermore, the spindle bore (106) of the spindle (104) is provided with a first tapered profile (114) and, a second tapered profile (116). Further, the first tapered profile (114) and the second tapered profile (116) forms a double tapered seating arrangement (118) for the primer (108).
[0033] In general, a primer refers to the small device or component that ignites the propellant in an artillery shell, initiating the firing sequence. It is a crucial element in the functioning of artillery systems, ensuring that the propellant ignites and propels the projectile out of the artillery piece. The primer typically contains a sensitive explosive compound that is activated by the firing pin or striker mechanism, initiating the ignition process. The successful ignition of the primer sets in motion the entire firing process, leading to the expulsion of the projectile from the artillery gun.
[0034] In an embodiment of the present invention, the primer seating arrangement (102) may be arranged on the breech assembly (100) of a projectile launching system (not shown). Further, the primer seating arrangement (102) may accommodate the primer (108) within the spindle bore (106) of the spindle (104). Furthermore, the feeding operation of the primer (108) may be performed by a primer feeding mechanism (124) in automatic mode. Further, a primer feeding mechanism (124) may push the primer (108) from a magazine (122) into the spindle bore (106). Furthermore, the feeding of the primer (108) may be performed in order to ignite a charge within a barrel (not shown) of the projectile launching system. In addition, a manual means may be provided for feeding of the primer (108) within the spindle bore (106). The manual means may provide an alternative option for the primer (108) feeding.
[0035] In an aspect, the activation of the primer (108) within the spindle bore (106) may initiate the combustion of the charge. Further, the activation of the primer (108) may be performed by a firing pin assembly (126). Further, the tremendous power generated by the combustion may launch the projectile (not shown) through the barrel. Furthermore, the primer feeding mechanism (124), the magazine (122) and, the firing pin assembly (126) may work in coordination for the feeding and activating the primer (108).
[0036] In yet another embodiment, the primer seating arrangement (102) may disclose the spindle (104). The spindle (104) may be a cylindrical body incorporated within the breech assembly (100). Further, the spindle (104) may extend throughout opposite faces of the breech assembly (100). More specifically, the spindle (104) may include one end facing primer feeding arrangement and other end facing the barrel of the projectile launching system. In one aspect the spindle (104) may be centrally located at the breech assembly (100). Further, the spindle (104) may include a spindle bore (106). Further, the spindle (104) may be provided with the outer casing. Furthermore, the spindle (104) may be separable or integrated with the breech assembly (100).
[0037] Now referring to figure 3, the spindle (104) of the primer seating arrangement (102) may disclose the spindle bore (106). Further, the spindle bore (106) may be provided with the first tapered profile (114) and the second tapered profile (116). Further, the first tapered profile (114) may include the profile with decreasing diameter from an opening end (106a) to a bottom end (106b) of the spindle bore (106). Further, the second tapered profile (116) may include the profile with decreasing diameter from the bottom end (106b) to a bottom most end (106c) of the spindle bore (106). Furthermore, the first tapered profile (114) and, the second tapered profile (116) may form the double tapered seating arrangement (118) for the primer (108). Further, the opening end (106a) of the spindle bore (106) may be configured to receive the primer (108). Further, an exit end (not shown) of the spindle bore (106) may be configured to pass the ignition from the primer (108) to ignite the charge within the barrel.
[0038] In yet another embodiment, the primer (108) may include a truncated cone body shape. Further, the truncated cone primer (108) may be fed within the spindle bore (106) of the spindle (104) by automatic means. Further, the primer (108) may include the collar (110). The collar (110) may be provided on the top edge of the primer (108). Further, the primer (108) with the collar (110) may be configured to seat above the opening end (106a) of the spindle bore (106). In another instance, the collar (110) of the primer (108) may rest on over the extractor (112). More specifically, the collar (110) may rest over plurality of arms of the extractor (112).
[0039] In yet another embodiment, the diameter of the opening end (106a) of the first tapered profile (114) of the spindle bore (106) may be larger than a maximum diameter of the truncated cone primer (108). Further, the larger diameter of the opening end (106a) may facilitate proper feeding of the primer (108) within the spindle bore (106) of the spindle (104). In one aspect, the difference between larger diameter of the opening end (106a) and the maximum diameter of primer (108) may provide tolerance limit for the alignment of the magazine (122) in order to feed the primer (108). More specifically, the bending or breaking of the primer (108) during the feeding process due to minor misalignment of the magazine (122) may be eliminated.
[0040] In addition, the diameters of the truncated cone primer (108) may be termed as the maximum diameter (dmax), a minimum diameter (dmin) and a collar diameter (dcollar). Further, the collar diameter (dcollar) may be the largest diameter among the diameters of truncated cone primer (108). Furthermore, the collar diameter (dcollar) may seat above the spindle bore (106) and upon the extractor (112).
[0041] In another aspect, the first tapered profile (114) may allow non-frictional entrance of the primer (108) due to larger diameter of the opening end (106a). Further, the forward movement of the primer (108) may begin frictional gripping of the primer (108) with respect to the decreasing diameter of the first tapered profile (114) from the opening end (106a) to the bottom end (106b). Furthermore, the second tapered profile (116) may firmly hold the primer (108). More specifically, the second tapered profile (116) may be configured to firmly hold the primer (108) within the profile with decreasing diameter from the bottom end (106b) to the bottom most end (106c). Further, the firm holding of the primer (108) may eliminate the chance of unwanted migration of the primer (108) during the shocks experienced during firing phase.
[0042] In one another aspect, the first tapered profile (114) and the second tapered profile (116) may form the double tapered seating arrangement (118) for the primer (108). Further, the tapered shape of the first tapered profile (114) may provide a clearance space around the primer (108) seated within the double tapered seating arrangement (118). Further, the double tapered seating arrangement (118) may hold the primer (108) elastically. Further, the plastic deformation of the bottom end part (128) of the primer (108) occurring during the primer feeding operation may be eliminated by double taper shaped profile of the double tapered seating arrangement (118) and the clearance space. Furthermore, the ejection of the primer by the extractor (112) may become smooth due to the taper shaped profile and the clearance space.
[0043] In an embodiment, the extractor (112) may be an ejection mechanism configured to remove the primer (108) from the spindle bore (106). Further, the extractor (112) may eject the primer (108) after the projectile firing phase of the projectile launching system. Furthermore, extractor (112) may include plurality of extractor arm. Further, the extractor (112) may be pivotally affixed to the spindle (104). Furthermore, the extractor (112) may include a swelling portion in contact with the firing pin assembly (126). In one aspect, the collar (110) of the primer (108) may rest on the plurality of the extractor arms of the extractor (112). Further, the extractor (112) may be actuated by the rearward displacement of the firing pin assembly (126). Furthermore, the extractor (112) may move in clockwise direction in order to pull out the primer (108) from the spindle bore (106) of the spindle (104). Furthermore, the swelling portion of the spindle (104) may be triggered by the rearward displacement of the firing pin assembly (126).
[0044] In yet another embodiment, the spindle (104) may be a separable component fitted within the breech assembly (100). Further, the spindle (104) may be manufactured by forging, or casting, or machining process. Further, the spindle (104) may be screw-fitted, or press-fitted or weld-fitted within the breech assembly (100). In another aspect, the spindle (104) may be an integrated component of the breech assembly (100). Further, the breech assembly (100) along with the integrated spindle (104) may be manufactured by forging, or casting, or machining process.
[0045] The invention is further defined by at least the examples provided in the following items:
Item 1 A primer seating arrangement (102) for a breech assembly (100), comprising:
a spindle (104) with an spindle bore (106);
an extractor (112);
a first tapered profile (114) of the spindle bore (106) of the spindle (104); and
a second tapered profile (116) of the spindle bore (106) of the spindle (104), wherein the first tapered profile (114) and the second tapered profile (116) forms a double tapered seating arrangement (118).
Item 2 The primer seating arrangement (102) of item 1, wherein a primer (108) configured to seat inside the spindle bore (106) of the spindle (104), wherein one end of the primer (108) has a collar (110), wherein the collar (110) is configured to seat above the spindle bore (106) and upon the extractor (112), wherein the said primer (108) has a truncated cone body.
Item 3 The primer seating arrangement (102) of item 1, wherein the first tapered profile (114) of said spindle bore (106) has a profile with decreasing diameter from an opening end (106a) to a bottom end (106b).
Item 4 The primer seating arrangement (102) of item 1 and 3, wherein the second tapered profile (116) of said spindle bore (106) has a profile with decreasing diameter from the bottom end (106b) to a bottom most end (106c).
Item 5 The primer seating arrangement (102) of item 1, 2 and 3, wherein the diameter of the opening end (106a) of the first tapered profile (114) is larger than the maximum diameter (dmax) of the truncated cone primer (108).
Item 6 The primer seating arrangement (102) of item 1, 2 and 3, wherein the larger diameter of the opening end (106a) of the first tapered profile (114) facilitates proper feeding of the primer (108) regardless the improper alignment of a magazine (122).
Item 7 The primer seating arrangement (102) of item 1 and 2, wherein shape of the first tapered profile (114) smoothly accommodates the primer (108), wherein shape of the second tapered profile (116) firmly holds the primer (108).
Item 8 The primer seating arrangement (102) of item 1 and 2, wherein shape of the double tapered seating arrangement (118) eliminates plastic deformation of the primer (108) during primer feeding.
Item 9 The primer seating arrangement (102) of item 1 and 2, wherein the extractor (112) is an ejection mechanism configured to remove the primer (108) from the spindle bore (106), wherein the extractor (112) is pivotally affixed to the spindle (104), wherein shape of the double tapered seating arrangement (118) enables smooth extraction of the primer (108) from the spindle bore (106).
Item 10 The primer seating arrangement (102) of item 1, 2 and 6, wherein the primer (108) is fed into the spindle bore (106) of the spindle (104) from the magazine (122) by a primer feeding mechanism (124).
[0046] The foregoing description shall be interpreted as illustrative and not in any limiting sense. A person of ordinary skill in the art would understand that certain modifications could come within the scope of this disclosure.
[0047] The embodiments, examples, and alternatives of the preceding paragraphs or the description, including any of their various aspects or respective individual feature(s), may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments unless such features are incompatible.
, Claims:1. A primer seating arrangement (102) for a breech assembly (100), comprising:
a spindle (104) with a spindle bore (106);
an extractor (112);
a first tapered profile (114) of the spindle bore (106) of the spindle (104); and
a second tapered profile (116) of the spindle bore (106) of the spindle (104), wherein the first tapered profile (114) and the second tapered profile (116) forms a double tapered seating arrangement (118).
2. The primer seating arrangement (102) as claimed in claim 1, wherein a primer (108) configured to seat inside the spindle bore (106) of the spindle (104), wherein one end of the primer (108) has a collar (110), wherein the collar (110) is configured to seat above the spindle bore (106) and upon the extractor (112), wherein the said primer (108) has a truncated cone body.
3. The primer seating arrangement (102) as claimed in claim 1, wherein the first tapered profile (114) of said spindle bore (106) has a profile with decreasing diameter from an opening end (106a) to a bottom end (106b).
4. The primer seating arrangement (102) as claimed in claim 1 and 3, wherein the second tapered profile (116) of said spindle bore (106) has a profile with decreasing diameter from the bottom end (106b) to a bottom most end (106c).
5. The primer seating arrangement (102) as claimed in claim 1, 2 and 3, wherein the diameter of the opening end (106a) of the first tapered profile (114) is larger than the maximum diameter (dmax) of a truncated cone primer (108).
6. The primer seating arrangement (102) as claimed in claim 1, 2 and 3, wherein larger diameter of the opening end (106a) of the first tapered profile (114) facilitates proper feeding of the primer (108) regardless improper alignment of a magazine (122).
7. The primer seating arrangement (102) as claimed in claim 1 and 2, wherein shape of the first tapered profile (114) smoothly accommodates the primer (108), wherein shape of the second tapered profile (116) firmly holds the primer (108).
8. The primer seating arrangement (102) as claimed in claim 1 and 2, wherein shape of the double tapered seating arrangement (118) eliminates plastic deformation of the primer (108) during primer feeding.
9. The primer seating arrangement (102) as claimed in claim 1 and 2, wherein the extractor (112) is an ejection mechanism configured to remove the primer (108) from the spindle bore (106), wherein the extractor (112) is pivotally affixed to the spindle (104), wherein shape of the double tapered seating arrangement (118) enables smooth extraction of the primer (108) from the spindle bore (106).
10. The primer seating arrangement (102) as claimed in claim 1, 2 and 6, wherein the primer (108) is fed into the spindle bore (106) of the spindle (104) from the magazine (122) by a primer feeding mechanism (124).