# US 4,395,836 A · Release apparatus for jet-propelled projectiles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,395,836 A - Document ID: US4395836A - Status: Granted - Kind: A - Application number: 06/206,370 - Filed: 1980-11-13 - Granted: 1983-08-02 - Earliest claimed: 1980-11-13 - Assignees: Brunswick Corporation - Inventors: Alan C. Baker; Joe T. Zinn, Jr. - Web page: https://patentgrep.com/patent/US4395836A ## CPC - F41F 3/048: Means for imparting spin to the rocket before launching - F41C 27/06: Adaptations of smallarms for firing grenades, e.g. rifle grenades, or for firing riot-control ammunition; Barrel attachments therefor (signal pistols F41C3/02) - F41F 3/052: Means for securing the rocket in the launching apparatus - F41F: APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS (smallarms F41C); LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B) - F41C: SMALLARMS, e.g. PISTOLS, RIFLES (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B); ACCESSORIES THEREFOR ## Abstract A projectile release mechanism is disclosed for facilitating launching of a jet-propelled projectile in the form of a spherical spin-stabilized missile. The apparatus includes a projectile support means which includes a rotary portion having a register section for receiving a unitary nozzle member which is fixed to the missile, for securing the missile to the support means. A fusible joint is formed integral with the unitary nozzle member and is disposed for heating by high-temperature exhaust gas expelled by the missile to release the missile from the rotary portion of the support means. The fusible joint comprises a peripheral ring portion of the unitary nozzle member, which is of a reduced sectional thickness. A plurality of passages are formed through the reduced ring portion for conducting the exhaust gas through the fusible joint. The rotary register section and the unitary nozzle member received therein have complementarily engageable, axially spaced concentric surfaces forming annular flat lands to insure proper alignment of the missile with the spin axis during initial separation of the unitary nozzle member at the fusible joint. ## Claims ### Claim 1 A projectile release mechanism for facilitating launching a jet-propelled projectile, comprising: projectile support means; and a one-piece, homogeneous nozzle member extending between said projectile and said support means and including means for securing the projectile to the support means, said one-piece nozzle member including a fusible portion formed as an integral part of said one-piece nozzle member and disposed for heating by high-temperature exhaust gas expelled by said projectile to release said projectile from said support means. ### Claim 2 (depends on 1) The projectile release mechanism of claim 1 wherein said fusible portion has passage means therethrough for conducting said exhaust gas through said fusible portion. ### Claim 3 (depends on 1) The projectile release mechanism of claim 1 wherein said jet-propelled projectile comprises a spin-stabilized missile, and said support means includes rotary means and means for supporting said rotary means for rotation about a spin axis coaxial with said nozzle member, said nozzle member being secured to said rotary means. ### Claim 4 (depends on 3) The projectile release mechanism of claim 3 wherein said nozzle member comprises a disposable tubular member which is threaded at opposite ends for engagement with complementary threaded receptacle means on said missile and said rotary means. ### Claim 5 (depends on 1) The projectile release mechanism of claim 1 wherein said nozzle member comprises a disposable tubular member which is threaded at opposite ends for engagement with complementary threaded receptacle means on said projectile and said support means, with said fusible portion being disposed intermediate the threaded opposite ends of the tubular member. ### Claim 6 A projectile release mechanism for facilitating launching a jet-propelled projectile, comprising: a projectile support means; a unitary nozzle member extending between said projectile and said support means for securing the projectile to the support means; and fusible joint means formed integral with said unitary nozzle member and disposed for heating by high-temperature exhaust gas expelled by said projectile to release said projectile from said support means, said fusible joint means including a peripheral ring portion of said unitary nozzle member of a reduced sectional thickness. ### Claim 7 (depends on 6) The projectile release mechanism of claim 6 wherein said fusible joint means further includes a plurality of passages of appropriate size and shape through said reduced ring portion for conducting said exhaust gas through said fusible joint means. ### Claim 8 A projectile release mechanism for facilitating launching a jet-propelled projectile which comprises a spin-stabilized missile, comprising: a projectile support means including rotary means and means for supporting said rotary means for rotation about a spin axis, said rotary means including a register section; a unitary nozzle member extending between said projectile and said support means for securing the projectile to the support means, the unitary nozzle member being secured to said rotary means and received by said register section coaxial with said spin axis, said unitary nozzle member comprising a disposable tubular member which is threaded at opposite ends for engagement with complementary threaded receptacle means on said missile and said rotary means, and said register section and said nozzle member having complementarily engageable, axially spaced concentric land means to insure proper alignment of said missile with said spin axis during initial separation; and fusible joint means formed integral with said unitary nozzle member and disposed for heating by high-temperature exhaust gas expelled by said projectile to release said projectile from said support means. ### Claim 9 A projectile release mechanism for facilitating launching a jet-propelled projectile, comprising: a projectile support means; a unitary nozzle member extending between said projectile and said support means for securing the projectile to the support means; fusible joint means formed integral with said unitary nozzle member and disposed for heating by high-temperature exhaust gas expelled by said projectile to release said projectile from said support means; and said support means including a register section for receiving said unitary nozzle member, said register section and said nozzle member having complementarily engageable, axially spaced concentric land means to insure proper alignment of said projectile during initial separation of said nozzle member at said fusible joint means. ### Claim 10 A release mechanism for facilitating launching of a spin-stabilized spherical jet-propelled missile having an exhaust nozzle, said release mechanism comprising: support means including rotary means and means for supporting said rotary means for rotation about a spin axis coaxial with said exhaust nozzle; a unitary nozzle member extending between said rotary means and said missile coaxial with said spin axis and in communication with said missile exhaust nozzle for securing said missile to said support means; and fusible joint means formed integral with said unitary nozzle member and disposed for heating by high-temperature exhaust gas expelled by said missile through said exhaust nozzle to release said missile from said support means, said fusible joint means including a peripheral ring portion of said unitary nozzle member of a reduced sectional thickness and a plurality of passages through said reduced ring portion for conducting said exhaust gas through said fusible joint means. ### Claim 11 (depends on 10) The release mechanism of claim 10 wherein said unitary nozzle member comprises a disposable tubular member which is threaded at opposite ends for engagement with complementarily threaded receptacle means on said missile and said rotary means. ### Claim 12 (depends on 10) The release mechanism of claim 10 wherein said rotary means includes a register section for receiving said unitary nozzle member, said register section and said unitary nozzle member having complementarily engageable, axially spaced concentric land means to insure proper alignment of said spin axis during initial separation of said unitary nozzle member at said fusible joint means. ### Claim 13 A projectile release mechanism for facilitating launching a projectile, comprising: a projectile support means including receptacle means defining a launching axis for said projectile; an extension member fixed to said projectile for axially mating with said receptacle means; separation means between said projectile and said support means; and complementarily engageable, axially spaced land means between said receptacle means and said extension member to insure proper alignment of said projectile with said launching axis during initial separation of said separation means. ### Claim 14 (depends on 13) The projectile release mechanism of claim 13 wherein said receptacle means comprises a socket-type register section for receiving said extension member of said projectile, with said complementarily engageable land means protruding inwardly of said register section and outwardly of said extension member. ### Claim 15 (depends on 14) The projectile release mechanism of claim 14 wherein said land means on each of said socket-type register section and said extension member comprises at least a pair of axially spaced, radially protruding, flat ring-type flange members defining concentric flat surfaces. ### Claim 16 A release mechanism for facilitating launching of a spin-stabilized spherical jet-propelled missile having an exhaust nozzle, said release mechanism comprising: missile support means including rotary means and means for supporting said rotary means for rotation about a spin axis coaxial with said exhaust nozzle, said rotary means including receptacle means defining said spin axis; a nozzle assembly on said missile, including a nozzle member extending between said missile and said support means in communication with said exhaust nozzle for securing said missile to said support means, said nozzle member extending into and mating with said receptacle means; separation means between said missile and said support means; and complementarily engageable, axially spaced land means between said receptacle means and said nozzle member to insure proper alignment of said missile with said spin axis during initial separation of said separation means. ### Claim 17 (depends on 16) The release mechanism of claim 16 wherein said receptacle means comprises a socket-type register section for receiving said nozzle member, with said complementarily engageable land means protruding inwardly of said register section and outwardly of said nozzle member. ### Claim 18 (depends on 17) The release mechanism of claim 17 wherein said land means on each of said socket-type register section and said nozzle member comprises at least a pair of axially spaced, radially protruding, flat ring-type flange members defining concentric flat surfaces. ### Claim 19 (depends on 16) The release mechanism of claim 16 wherein said separation means comprises fusible joint means on said nozzle assembly. ### Claim 20 (depends on 19) The release mechanism of claim 19 wherein said land means is disposed within said receptacle means axially outwardly of said fusible joint means. ### Claim 21 (depends on 20) The release mechanism of claim 20 wherein said nozzle member comprises a disposable tubular member which is threaded at opposite ends for engagement with complementarily threaded portions on said missile and said receptacle means.