Oct. 1, 1946. ' E, M, SHI'NKLE 2,408,486 HAND GRENADE AND ‘FUSE THEREFOR Filed March»28, 1945 INVENTOK 2,408,486 Patented Oct. 1, 1946 UNITED STATES PATENT’ OFFICE. 2,408,486 HAND'GRENADE AND FUSE THEREFOR :Edward, M. , Shinkle, Burlington, vIowa Application ,March 28, 1945, Serial, No. ‘585,314 :2 Claims. (0]. 102-64) 2 1 through opening 3 after installation of the vfuse. The fuse assembly comprises a housing 1 which is screwed into threaded opening 6 and ‘has a of this character havinga fuse adapted to oper shoulder 8 bearing'against the gasket 9. The in ate upon impact to explode or detonate the charge in the grenade. c1 termediate member I 0 of the fuse assembly is threaded onto the lower end of the housing 1 and Grenades as generally constructed are pro is provided with a conical seat I ! opposite a sim vided with time or delay fuses set in'operation by ilar seat 12 formed in the lower portion of the the ‘thrower of the grenade. Usual types of fuses housing 1. function upon the release of a lever or handle to Themovable operating portion of the fuse com start the‘fuse action prior to or upon throwing 10 prises the ball portion l3 having the threaded the grenade. These constructions have the ob stem l4 upon which ‘the weight I5 is ?rmly jection that the delay vaction of the fuse may be screwed. The upper portion of the weight I5 has sufficient to permit persons at whom the grenade a tapered surface It to permit greater angular is thrown either to ‘throw back the grenade or to dispose of it prior to the explosion. If the user 15 displacement of the weight in the cavity I‘! of the fuse housing 1. It will be apparent that the ball of the grenade attempts to avoid this by holding portion It! forms 'a ball and socket joint with the grenade for a period of time after the fuse the conical seats H and i2, its angular displace starts to function, there is danger of holding it ment being limited by engagement of the weight too long or from an abnormally short time ele 20 55 with the walls of the cavity H. ment in the fuse. The open end of cavity l7 isnormally closed by It is van object of the present invention topro the cap l8, having the lug l9 ?tting into the bore vide an improved grenade and fuse therefor 25) in the upper end of the weight I5. The com adapted to function uponimpact. pression spring 2| is ?tted into bore 20 and en It is a further object to provide a device of this gages lug l9 to urge the cap l8 upward to free character which is "safe to handle and to throw theweight IS. The fuse is provided with the safe and which will explode upon impact regardless of ty wire 22 passing through aligned openings in the position in which it may falland of the nature the housing ‘Land .Qap I8 to retain the cap in of the material'stopping its flight. 'This invention relates'to a new and improved hand grenade and more particularly to a grenade Itis also an object to provide'a grenade and fuse'therefor-which are simple in design and con place against the pressure of spring 2 i. The pull 30 ring 23 is connected to the safety wire 22 for use struction and adapted for commercialv produc in ‘removing the wire. tion. Other and further objects will appear as the provided with a concave outer ‘face to facilitate holding it in place by means of the thumb or description proceeds. ?nger after the safety wire has'been withdrawn. I have shown a preferred embodiment of my invention in the accompanying drawing in which the single ?gure is a vertical cross section through the grenade and fuse, In the drawing the body of the grenade has been shown at i, this body being provided with ribs 2 which enable the user to get a better grip thereon or to prevent slipping in the hand when wet or muddy. These ribs or other suitable con ?guration may also increase the e?iciency of the fragmentation of the body when the grenade ex plodes. The lower portion of the body I is pro vided with a threaded opening 3, closed by a plug 4, bearing against the gasket 5. This opening 3 . may be eliminated if the grenade is ?lled with an explosive which sets in solid form after being poured into the grenade since such as explosive may be poured in through fuse opening 6 formed in the opposite side of the grenade prior to in stallation of the fuse. When a loose or granular The cap I 8 is shown as The ball portion I3 has a cylindrical recess formed therein to receive the ampule 24 which is cemented in place therein. The ampule is made of glass or similar acid resistant and readily frangible material. The ampule 24 is of such size as to clear the circular shoulder 25 at the lower edge of the conical seat I I. The washer 26 is seated in a recess formed in the intermediate member ID below the shoulder 25. This washer 2B is formed of sponge rubber, felt or other relatively soft and pliable material and ?ts closely about the ampule 24. Its primary function is to retain in place the chemicals 21 in the cavity 28 in the lower end of intermediate member ID and to prevent them from working up into the ball and socket joint during transporta tion or movement of the device. The washer 26 has the secondary function of forming a soft bed for the ampule 24 while at the same time not explosive is used, it may best be introduced 55 being sufficiently rigid to materially restrain aeoaese 3 movement of the ampule when the ball and socket joint is freed for operation of the fuse. The lower end of the intermediate member ID has the closing plug 29 threaded thereon, the joint being provided with the gasket 30. The detonator 3| is held upon the plug 29 by means of the cup 32 which is peened or staked to the of my invention, it is to be understood to be illus trative only as it is capable of modi?cation and change to meet varying conditions and require ments within the scope of the appended claims. I claim: . 1. In a grenade or the like, a grenade body, a fuse assembly ?tted therein, the assembly com prising a housing member and an intermediate member having opposed seats formed therein, a ball ?tted on said seats, a weight secured to the plug. While my construction of grenade and fuse can be used with various types of chemical igniters and detonators, it has been found that a suitable ball, the housing member having a cavity formed mixture for the ampule 24 comprises approxi mately 75 parts of sulphuric acid and 25 parts of orthonitrotoluene. The chemicals in'dry pow , therein enclosing the weight and permitting lim ited movement thereof, a removable closure for dered form at 27 may comprise a mixture of ap the cavity engaging the Weight and preventing 15 movement thereof, a frangible ampule secured to proximately 55 parts of potassium chlorate and 45 parts lead sulphocyanate. When the liquid the ball normally spaced from adjacent fixed por tions of the fuse, chemical means in the ampule from the ampule comes in contact with the pow and additional chemical means carried adjacent dered chemicals, the reaction is such as to ignite the ampule, the two chemical means when the priming in the upper part of the detonator. 20 brought into contact serving to initiate an explo The priming in turn ignites the initiator such as sion of the grenade, the size relationship between lead azide or fulminate of mercury immediately the weight and its enclosing cavity being such adjacent the priming in the. detonator. The det that the weight upon release may move suffi onator sets off the explosive ?lling the grenade ciently to swing the ampule against adjacent ?xed and causes it to explode or detonate depending H portions of the fuse and break the ampule to on its character. release its contents. In use, the grenade is grasped in the hand with a thumb or ?nger holding the cap is ?rmly in 2. In a grenade or the like, a grenade body, a fuse assembly ?tted therein, the assembly com prising a housing member and an intermediate , place against the spring 2! while the safety wire is Withdrawn by means of ring 23. The gre iii) member having opposed seats formed therein, a nade is then thrown to hit as nearas possible to the point where theexplosion is desired. While in the hand of the thrower the grenadeis safe as long as the cap 18 is held in place since the lug l9 remains engaged in its socket in weight 15 to restrain the Weight against lateral swinging movement. ball ?tted on said seats, a weight secured to the ball, the housing member having a cavity formed therein enclosing the weight and permitting lim tied movement thereof, a cap closing the cavity, removable securing means for positively main taining the cap in closing position, inter?tting As soon as the grenade leaves the means on the cap and weight whereby the cap thrower’s hand, the spring 2i ejects the cap I8 and thus leaves the weight l5 and the ball l3 in closing position holds the weight against swing ing movement, spring means adapted to force the carrying ampule 25 free to move until the weight 40 cap out of engagement with the weight-upon re strikes the wall of the bore ll. When the grenade lease of the cap, a frangible ampule secured to strikes any solid object the weight 15 will swing the ball normally spaced from adjacent ?xed to its limit of movement, striking the ampule portions of the fuse, chemical means in the am-v against the shoulder 25 in the intermediate mem pule and additional chemical means carried ad 45 jacent the ampule, the two chemical means when ber I9. . The breaking of the ampule 24 against shoulder brought into contact serving to initiate an ex 25 releases its contents upon thechemicals at 2,1 plosion of the grenade, the size relationship. be and the reaction causes the explosion to take tween the weight and its closing cavity being such place immediately. The sensitivity of the mech that the weight upon release may move sul? anism can be controlled within limits by varying v ciently to swing the ampule against adjacent ?xed the size of the weight l5, the strength of the ampule 24, the diameter of the balland socket joint and the e?ective lever arms. While I have shown .a preferred embodiment portions of the fuse and break the ampule to release its contents. EDWARD M. SHINKLE.