US3496828A - Percussion device for firearms - Google Patents

Percussion device for firearms Download PDF

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Publication number
US3496828A
US3496828A US720681A US3496828DA US3496828A US 3496828 A US3496828 A US 3496828A US 720681 A US720681 A US 720681A US 3496828D A US3496828D A US 3496828DA US 3496828 A US3496828 A US 3496828A
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US
United States
Prior art keywords
rod
striker
valve
hammer
percussion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US720681A
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English (en)
Inventor
Fredric Arno Donner
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Individual
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Individual
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Publication date
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Publication of US3496828A publication Critical patent/US3496828A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/13—Percussion or firing pins, i.e. fixed or slidably-mounted striker elements; Mountings therefor

Definitions

  • the striker for a firearm such as a mortar consists of a rod supported for axial sliding movement in a passage which includes a valve seat facing the projectile-receiving chamber of the firearm, and the striker rod is provided with a sealing valve which is applied against the valve seat by return means associated with the striker rod, the valve and valve seat providing a seal before the process of combustion of powder gives rise to high gas ressure.
  • the invention relates to firing mechanism for firearms, particularly firearms such as mortars.
  • the striker rod In the event of the accidental malfunctioning of the sealing device, the striker rod is in fact corroded by the burning gases, tightness can no longer be obtained, corrosion is accelerated, and the rod is rapidly destroyed.
  • Another disadvantage is that the gripping around the rod may occur in the percussion position and the rod may be wedged in that position through the action of condensed or deposited combustion residues.
  • the percussion takes place as soon as loading is effected, thus giving rise to serious, uncontrollable danger of premature firing, or else percussion does not take place if wedging occurs in the retracted position of the striker, thus necessitating delicate and dangerous operations for the unloading of the weapon.
  • a percussion device for firearms comprising a projectile receiving chamber having associated therewith a striker rod and a striker formed by a rod which strikes against a pzimer, striking mechanism including a hammer, wherein the striker rod is slidable axially and freely in a passage provided through a wall of the projectile-receiving chamber and carries a sealing valve for co-operation with a seat formed around said passage and facing the interior of the chamber, and wherein return means co-operates with the striker rod to hold the sealing valve against said seat.
  • the force applied by the return means is designed to effect the return of the valve to its Seat in a predetermined time, which is variable in accordance with the various applications of the invention and Which makes it possible to provide a seal before the process of combustion of the powder gives rise to high gas pressure.
  • the hammer is so arranged as not to hinder the return of the valve to its seat, and for that purpose is provided with return means returning it to the neutral position.
  • the hammer is returned to the starting position by a spring of determined force, which may or may not be assisted by the effect of the rebound of the hammer at the end of the percussion movement, or by a positive drive.
  • FIG. 1 is an axial section of a striker according to the invention, with a percussion hammer
  • FIG. 2 is a partial view illustrating a positively driven hammer in an intermediate position
  • FIGS. 3 and 4 illustrate the hammer of FIG. 2, in the percussion and return positions.
  • FIG. 1 shows in partial section a firearm barrel 1 having a bottom 2 provided with an internal boss 3.
  • the boss 3 is extended towards the interior of the projectile-receiving chamber 1' of the barrel by means of a tube 4 divided by an intermediate partition 5 into two compartments, namely the front and rear compartments designated by 6 and 7 respectively.
  • the front compartment 6 is closed by a plate 8 held in position by means of a threaded cap 9 screwed on the tube 4.
  • the cap 9, plate 8, and partition 5 have coaxial holes in which a striker rod 10 is slidably mounted.
  • the striker rod 10 has an enlarged portion 11 forming a sealing valve, and round its hole for the passage of the rod 10 the plate 8 has a corresponding valve seat 12 which faces towards the chamber 1'.
  • the rod 10 also carries a collar 13 opposite the front face of the partition 5.
  • the weight of the striker rod including its enlarged portion forming the valve, and added to an adequate fraction of the weight of the washers forming a spring, is of the order of grams and the pressure of the springs is designed so that the valve is returned to its seat in a time of from 2 to 3 milliseconds as a maximum, counting from the moment of percussion, the total movement of the moving parts being about 2.5 mm.
  • the striking mechanism is formed of a heavy part or hammer 22 suitably actuated, for example by means of a spring previously loaded and abruptly freed.
  • the hammer 22 encounters the rod of the striker 10 and approximately at the same moment encounters the resistance of a powerful spring 15.
  • the hammer has sufiicient energy to compress the spring plus the return spring 14 for the rod and to effect the percussion, after which at the end of its movement it strikes against the bottom of its housing, constituted by the rear face 16 of the partition 5.
  • the spring has a force such that it effects the return of the hammer in a time at most equal to the time required to effect the closing of the striker valve.
  • the time during which the valve remains open is not influenced by the striking mechanism.
  • the striking mechanism itself determines, through its return, the moment of closing of the valve, the spring 15 being designed to effect this return before the hot gases reach a high pressure.
  • the hammer return spring has a more prolonged action and the rebound of the hammer at the end of its movement is used to free the valve closing movement.
  • the movements of the hammer 22 have a positive drive by means of an eccentric 17, and the rod 10 carries a rear tip 18 which is of greater cross-section than that of the rod 10 and which is in a freely slidable chamber 19 formed in front of the hammer 22.
  • FIGS. 1 to 4 the movements of the hammer 22 have a positive drive by means of an eccentric 17, and the rod 10 carries a rear tip 18 which is of greater cross-section than that of the rod 10 and which is in a freely slidable chamber 19 formed in front of the hammer 22.
  • percussion is eifected through contact of the rear face 20 of the chamber 19 with the tip 18, and the rod is also returned positively through the contact of the tip 18 with the front face 21 of the chamber 19.
  • a complete forward and return movement of the rod and hammer corresponds to a movement of one revolution of the eccentric 17, which is effected abruptly under the action of a spring.
  • the positive return drive makes it possible to ensure the return to the rear of the striker point, to enable it to retract into the cap 9 out of the chamber 1, and to eliminate the danger of premature percussion on the next loading. Nevertheless, the return movement of the hammer 22 is not suflicient to bring the valve back against its seat, and the return movement of the valve is completed freely under the action of the springs 14.
  • a percussion device for mortars having a projectile receiving chamber comprising a compartment defining structure with a tubular wall and two end walls, a striker rod, striking mechanism including a hammer, wherein the striker rod is slidable axially and freely through coaxial holes formed respectively in said end walls and carries a sealing valve for cooperation with a seat formed around one of said holes for shutting off said compartment from said chamber, and return means located within said compartment around said striker rod to hold the sealing valve against said seat.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Percussive Tools And Related Accessories (AREA)
US720681A 1967-04-20 1968-04-11 Percussion device for firearms Expired - Lifetime US3496828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR103442A FR1529721A (fr) 1967-04-20 1967-04-20 Percuteur d'arme à feu

Publications (1)

Publication Number Publication Date
US3496828A true US3496828A (en) 1970-02-24

Family

ID=8629247

Family Applications (1)

Application Number Title Priority Date Filing Date
US720681A Expired - Lifetime US3496828A (en) 1967-04-20 1968-04-11 Percussion device for firearms

Country Status (7)

Country Link
US (1) US3496828A (sv)
DE (1) DE1703226A1 (sv)
FI (1) FI51635C (sv)
FR (1) FR1529721A (sv)
GB (1) GB1222439A (sv)
IL (1) IL29792A (sv)
SE (1) SE342908B (sv)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728938A (en) * 1971-04-16 1973-04-24 A Scibor Breech seal for caseless ammunition firearm
US3888031A (en) * 1973-10-05 1975-06-10 Valinor Anstalt Ballistic set including a projectile and its launching device
FR2670573A1 (fr) * 1986-03-12 1992-06-19 Heckler & Koch Gmbh Systeme percuteur pour arme a feu.
ES2054552A2 (es) * 1992-03-05 1994-08-01 Garcia Jose Garcia Mecanismo de disparo de doble accion para mortero con adaptacion exterior al cierre y detector de fuga de gases.
WO1995016182A1 (en) * 1993-12-08 1995-06-15 Bofors Ab Firing mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236947B (de) * 1957-11-25 1967-03-16 Raeder Fechtel K G Stapelkarre
DE7721573U1 (de) * 1977-07-09 1978-10-05 Fa. Diehl, 8500 Nuernberg Wiederspannabzug
DE3239898A1 (de) * 1982-10-28 1984-05-03 Herbert 7762 Bodman Ernst Fahrwerk fuer lasten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477253A (en) * 1946-07-01 1949-07-26 Brandt Edgar Ets Mortar
US2714836A (en) * 1949-03-15 1955-08-09 Brandt Soc Nouv Ets Percussion mechanisms for fire arm
US3355989A (en) * 1965-10-14 1967-12-05 George R Kruzell Closed breech rocket gun

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477253A (en) * 1946-07-01 1949-07-26 Brandt Edgar Ets Mortar
US2714836A (en) * 1949-03-15 1955-08-09 Brandt Soc Nouv Ets Percussion mechanisms for fire arm
US3355989A (en) * 1965-10-14 1967-12-05 George R Kruzell Closed breech rocket gun

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728938A (en) * 1971-04-16 1973-04-24 A Scibor Breech seal for caseless ammunition firearm
US3888031A (en) * 1973-10-05 1975-06-10 Valinor Anstalt Ballistic set including a projectile and its launching device
FR2670573A1 (fr) * 1986-03-12 1992-06-19 Heckler & Koch Gmbh Systeme percuteur pour arme a feu.
BE1005631A5 (fr) * 1986-03-12 1993-11-30 Heckler & Koch Gmbh Arrangement de percuteur dans une arme a feu.
ES2054552A2 (es) * 1992-03-05 1994-08-01 Garcia Jose Garcia Mecanismo de disparo de doble accion para mortero con adaptacion exterior al cierre y detector de fuga de gases.
WO1995016182A1 (en) * 1993-12-08 1995-06-15 Bofors Ab Firing mechanism

Also Published As

Publication number Publication date
DE1703226A1 (de) 1972-01-13
FI51635C (sv) 1977-02-10
SE342908B (sv) 1972-02-21
IL29792A (en) 1972-07-26
GB1222439A (en) 1971-02-10
FI51635B (sv) 1976-11-01
IL29792A0 (en) 1968-11-27
FR1529721A (fr) 1968-06-21

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