Abstract:
In accordance with the present invention, a Collector&#39;s Model Disintegrator Pistol (CMDP) is formed from a pair of right side and left side metal castings according to the investment or &#34;lost wax&#34; casting process. Preferably the left and right hand pistol sections are formed of suitable ornamental bronze, with a wide variety of possible bronze compositions being usable, depending upon cost and desirability of a particular finish. The bronze left and right sections are held together with counter sunk-screws instead of the crimped projections according to the construction made of U.S. Pat. No. 2,077,763. Additionally the U-shaped guide assembly of the &#39;763 patent is eliminated and a trigger guide assembly is contoured into the cast left and right sections of the pistol to make construction simpler and less expensive.

Description:
BACKGROUND OF THE INVENTION 
     U.S. Pat. No. 2,077,763 discloses a toy gun formed of two complimentary metal stampings held together with five crimped outwardly extending projections. 
     The metal stampings together define a handle portion, a body portion including a slot for activating a trigger, and an outwardly extending barrel portion housing an air cylinder and a pop mechanism. 
     Located between the metal stampings is a generally U-shaped guide assembly for a trigger assembly for operating the pop mechanism. 
     However, the design described in U.S. Pat. No. 2,077,763 has the disadvantage that the metal stampings do not have a classical or collector&#39;s item external appearance. 
     The toy guns according to U.S. Pat. No. 2,077,763 were made with a construction whereby the metal stampings were held together with five crimped projections. These projections do not make a classical or collector&#39;s item appearance. Furthermore, the crimped projections are less rugged. 
     The U-shaped guide trigger assembly described in the U.S. Pat. No. 2,077,763 is an expensive member and makes fabrication of the assembly according to the &#39;763 patent unnecessarily complicated and expensive. 
     SUMMARY OF THE INVENTION 
     A) Objects of the Invention 
     One object of the present invention is to provide a Collector&#39;s Model Disintegrator Pistol (CMDP) which is made of a material which gives a classical, collector&#39;s item external appearance. 
     Another object of the present invention is to provide a method of forming the CMDP with an external appearance of a classical, collector&#39;s item. 
     Another object of the present invention is to provide an improved arrangement for holding the two halves of the pistol assembly together. 
     Another object of the present invention is to reduce the cost of manufacture of the internal parts of the CMDP by eliminating the guide assembly for the trigger described in U.S. Pat. No. 2,077,763. 
     Other objects will be apparent from the description and drawings provided herein after. 
     B) Summary 
     In accordance with the present invention the foregoing objects are achieved by forming the CMDP from a pair of right side and left side metal castings formed according to the &#34;lost wax&#34; or investment casting process. Preferably the left and right hand pistol sections are formed of suitable bronze with a wide variety of possible bronze compositions being usable, depending upon cost and desirability of a particular finish. 
     The bronze left and right sections are held together with counter sunk-screws instead of the crimped projections according to the construction made of the &#39;763 patent. 
     Additionally the U-shaped guide assembly of the &#39;763 patent is eliminated and a trigger guide assembly is contoured into the cast left and right sections of the CMDP. 
    
    
     THE DRAWINGS 
     FIG. 1 is a side elevation view partly in sections of the CMDP of the present invention. 
     FIG. 2 is a side elevation view of the pistol of the present invention. 
     FIG. 3 is a side elevation view of a second half of the pistol of the present invention. 
     FIG. 4 is a side elevation view partly in sections of the pistol of the present invention. 
     FIG. 5 is a view of the flint knob assembly of the present invention. 
     FIG. 6 is a view of the flint housing of the present invention. 
     FIG. 6A is a view looking in the direction of the arrows along the line 6A--6A in FIG. 6. 
     FIG. 7 is a view of the flint pusher of the present invention. 
     FIG. 7A is an enlarged view of a portion of FIG. 1. 
     FIG. 8 is a view of the transparent lenses utilized in the flint opening in the present invention. 
     FIG. 8A is a view looking in the direction of the arrows along the line 8A--8A in FIG. 8. 
     FIG. 9 is an end view of a cooling assembly utilized in the present invention. 
     FIG. 9A is a side elevation view of a flint assembly used in the present invention. 
     FIG. 10 is a side elevation view partly in section of the outermost cooling assembly of the present invention also including a sight in accordance with the present invention. 
     FIG. 10A is a top view of FIG. 10 in accordance with the present invention. 
     FIG. 10B is an end view of FIG. 10 in accordance with the present invention. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The Collector&#39;s Model Disintegrator Pistol (CMDP) is indicated in the drawing Marked FIG. 1 through FIG. 10. The pistol includes a body portion (20), a handle portion (22) and a barrel portion (24). (FIG. 3). 
     The handle portion (22), body portion (20), and barrel portion (24) are formed from a pair of cast members formed from the &#34;lost wax&#34; or investment casting process and indicated in the drawings at 12 and 12&#39; respectively, being the right and left members and mirror images of each other. Bronze or other alloys may be used, such as alloys C80100-C87400 of the 1990 MATERIALS SELECTOR, pp. 100-101. (FIGS. 3 &amp; 4). 
     The &#34;lost wax&#34; or investment casting process is a very old, well known casting process for making difficult to form shapes and avoid expensive machining. For example, see A. J. Clegg, Precision Casting Processes, Pergamon Press, Oxford, N.Y., pp. 145-173, Copyright 1991; Heine, et al., Principles of Metal Casting, 2nd Ed. Copyright 1967, McGraw Hill, pp. 36-41; Metals Handbooks 8th Ed., Vol. 5, pp. 237-261, 9th Ed. pp. 253-269; Lost Wax Process of Casting Jewelry, Keith Edwards, Copyright 1985, Henry Regnery Co. The process involves production of an expendable (usually wax) pattern. This pattern is a precise component produced from a precision-engineered die. Complex features may be obtained in the pattern by the use of multi-part dies or by the use of soluble wax cores or permanent ceramic cores. The wax patterns are assembled with the gating and feeding system and cleaned prior to their investment with the ceramic coating. This ceramic coating is built up through successive stages of dipping and stuccoing. The initial (primary) dip coat, containing a fine refractory, is allowed to gel before the assembly is dipped in a secondary dip tank and stuccoed with coarser, dry particles in a raining cabinet or fluidized bed. Following gelation of the binder this procedure is repeated until the required shell thickness is obtained. On completion of the gelation stage the expendable wax pattern is removed, preferably in a steam autoclave, and the ceramic shell fired to around 1000 degrees Celsius prior to casting. Pistol halves 12, 12&#39; are so cast. 
     The right and left cast sections (12, 12&#39;) are held together with brass screws (14) extending from one member to the other through openings at 16, 17, and 18. The openings are counter sunk on one end and threaded on the other to achieve an effective fastening arrangement which has a good external appearance. The composition and color of the brass screws preferably matches the composition and color of the bronze casting halves. 
     The handle portion (22) includes cast projections (28) which extend from wall portion (25) formed in each of the left and right halves. The handle portion is hollow as indicated at 26. 
     The pistol body portion (20) includes a wall portion (21) again formed from the cooperating left and right cast pistol halves and includes a cast trigger opening (30) and cam slot (36, 36&#39;) cast into each of the respective cast halves (12, 12&#39;). (FIGS. 2 &amp; 4). 
     A trigger member (40) is pivotally mounted at 44 upon a transversely extending pin (46). The trigger (40) is channel shaped and includes an arcuate distal end portion (42) for grasping by a finger of the operator. The pin (44) may be threaded into a drilled opening in either or both of the half members (12, 12&#39;). (FIG. 2). 
     A link (50) is also channel shaped and is pivotally mounted upon the trigger (40) by means of a dowel pin (52) extending through the opening (53) at one end, and includes a slot (58) near its distal end. 
     The pin (52) (FIG. 2) moves through opening (48) in trigger (40) within the slot (36, 36&#39;) (FIG. 4) formed in the interior of the left and right members by the casting process. (FIG. 2 &amp; FIG. 4). 
     A lever spring (100) includes a first leg (102) connected to link (50) and a depending leg (104) adopted to engage the surface (45) of trigger member (40). Spring (100) biases link (50) and trigger (40) into the forward position shown in FIG. 1. (FIG. 2 also). 
     A piston rod (60) includes a rod portion (62) which extends within a coil spring (80), an inclined portion (64) within body portion (20), a horizontal portion (66) having a cut or rough area (67), and a distal end portion (68) having a downward extension (69) extending into the slot (58). Piston rod (68) may be a stamped or punched metal pan. (FIG. 2). 
     It is to be noted that piston rod (60) engages inner body wall portions (27 and 29) during its back and forth movement through the body portion (20). (FIG. 2). 
     Piston rod portion (62) extends within a coil spring (80) located in the barrel portion (24). The barrel portion (24) includes a wall portion (82) which is hollow which receives the coil spring (80) and cylinder (70). The cylinder (70) receives a piston head (72) connected in a suitable manner to the piston rod (60) by interference fit or by mechanical fasteners. (FIG. 2). 
     The wall portion (82) of the barrel (24) is reduced in cross section at 86 to mount the cylinder (70) therein. (FIG. 2). 
     Furthermore, the cross section of the barrel portion (82) is increased at 88 to receive a spring (90). Spring (90) has a head (92) connected to a piston (94) which in turn is connected to a piston head (96) located within the cylinder (70). (FIG. 2). The space (95) is between piston heads (72) and (96). 
     Both coil springs (80, 90) are commercially available items. For example, spring (90) may be a CO360-051-125OM. (FIG. 2). 
     A spark (flint) assembly (79) includes an opening (112) in head portion (162) of body portion (20) opening (112) receives a flint knob (114) having a knurled gripping portion (116), a threaded portion (118) and a projecting non-threaded portion (120) of reduced cross section (FIG. 2 and FIG. 5). 
     A flint housing (130, FIG. 6) is mounted within a head portion (162) and includes an upward extending hollow threaded portion (132) adopted to receive projecting portion (120), threaded portion (118) of flint knob (114). Threads (134) extend into a housing body portion (136). (FIG. 6). 
     An unthreaded downward extending portion (137) includes an opening (138). A flint pusher (140) includes a upwardly extending portion (142) adopted to extend into housing (138) and engage the lower portion of a spring (146) mounted within housing (130). Spring (146) may be purchased item C0088-012-0620M. (FIGS. 2, 6, &amp; 7). 
     Spring (146) is held captive between the depending portion (120) of knob (114) and upwardly extending portion (142) of flint pusher (140). Hint pusher (140, FIG. 7) engages the flint (150) to force it into the engagement with the cut and rough portion (67) of piston rod (60) as piston rod (60) moves from right to left after spring (80) is released. (FIGS. 2, 5 &amp; 7). 
     It is to be noted that the guide portion for the movement of piston rod (60) is formed by cooperating services of the cast halves (12, 12&#39;). Thus the pin (52) moves within opposed slots (36, 36&#39;) formed in the two halves (12, 12&#39;). Piston rod portion (66) moves along the surfaces (27, 29) of body portion (20). Thus the need for a separate guide assembly for piston rod (60) is avoided in the present invention. (FIG. 2). 
     Openings (160) are provided in the head portion (162). Translucent members (170) including spark lens members (172) having contoured comers (173, 174, FIG. 8) are held within the openings (160) by means of a suitable adhesive such as glue or with mechanical fasteners. Thus, when the piston rod (60) moves against the flint (150) and the spark ignites, the spark will be viewable through the translucent members (170) located in openings (160). (FIG. 2, 8). 
     A cooling fin assembly (180, FIGS. 9 and 9A) includes a plurality of tapered thin members (182) extending outward from a circular wall portion (184) which integrally engages the barrel portion (24) at portion (83). Cooling fin assembly (180) is conveniently made of aluminum or magnesium alloy, see 1990 MATERIALS SELECTOR pp. 78-87 and 106-109; and may be either diecast or extruded as single piece for economy of production. It may be shrunk to achieve an integral connection with barrel body portion (83) or a suitable adhesive may be used such as Lock-Tite. (FIGS. 1, 2, 9 and 9A). 
     A second cooling fin assembly (190) is provided (FIGS. 10 and 10B) including tapered fin members (192) extending out from a fin body portion (194). Cooling fin assembly (190) may also be made of aluminum, magnesium, or alloy and may be diecast or extruded. See MATERIALS SELECTOR supra. 
     The cross-sectional area of the body portion (194) becomes reduced as indicated at (196) to facilitate attachment of the cooling assembly to the portion (88) barrel (24). (FIGS. 2 and 10). 
     A projection (197) is formed in cooling assembly (190) and contoured as indicated in FIG. 10B having opposed sides (198, 199) to form a sight. (FIG. 10). 
     In operation to install the flint, the knob (114) is rotated to remove the knob (114), spring (146), and the flint pusher (140). The flint (150) is then placed upon the piston rod portion (67). Then the spring (146) is reinserted located between the flint pusher (140) and the flint knob (114). The flint knob is rotated to provide suitable pressure to maintain the flint in engagement in the rod portion (67). As the flint (150) is worn, pressure may be maintained by further rotation of knob (114). (FIGS. 5 and 7). 
     In order to operate, grasp the handle portion (22), insert finger through opening (30), pull upon the trigger member (40) causing it to pivot about the pin (46), move the pin (52) along the slot (36), moving link (50) from left to right sufficient to move the slot (58) and the downward extension (69) from left to right in FIG. 2. This movement of rod (60) is opposite to the bias of spring (80) and also opposite to the bias spring (102). This movement of piston rod (60) occurs with respect to fixed cylinder (70). This movement continues until the trigger (40) forces the link (50) sufficiently far to the right that the projection (69) is moved out of the slot (58). When this occurs, the piston rod (60) then under the bias of the spring (80) moves rod (60) from right to left very rapidly. During right to left movement of the piston red (60) the stationary flint (150) engages the cut and/or roughened portion (67) of the piston red and causes a spark to occur. This spark is viewable through the translucent members (172) in the viewing assembly (160). (FIGS. 2 &amp; 8). 
     The right to left movement of rod (60) causes air compressed within the cylinder (70) to escape from the cylinder (70), and piston head (72) abuts piston head (96), causing a &#34;pop&#34;. (FIG. 2). 
     The action of the piston (60) is cushioned by the spring assembly (90) when the head (96) engages the piston head (63). This depresses the spring (91) which acts as a cushion for the piston (60). (FIG. 2). 
     Spring (100) causes trigger (40) and link (50) to return to their original position. When this occurs projection (69) again engages the slot (58) in link (50) to allow repeating of this procedure. (FIG. 2). 
     The cooling fin assemblies (180, 190) do not function significantly to cool the assembly because there is not sufficient real heat generated in this pistol. These assemblies are primarily provided for decoration and simulation of actual pistol firing. 
     The use of the &#34;lost wax&#34; or investment casting process to form the housing halves (12, 12&#39;) of the pistol allows the construction of an attractive classical, outer finish of the pistol depending on alloy composition. The use of counter sunk screws (16, 17, 18) provides an attractive and effective method of holding the assembly together. The use of the pistol halves (12, 12&#39;) to form the guiding assembly for the action of piston rod (60) including the slot (36, 36&#39;) and the surfaces (27, 29) of the body portion represents a significant improvement over the construction shown in U.S. Pat. No. 2,077,763, since the expensive guiding element has been eliminated in accordance with the present invention. (FIGS. 2 and 3).