WO1995016181A1 - Fire rate control mechanism for a weapon - Google Patents
Fire rate control mechanism for a weapon Download PDFInfo
- Publication number
- WO1995016181A1 WO1995016181A1 PCT/GB1993/002516 GB9302516W WO9516181A1 WO 1995016181 A1 WO1995016181 A1 WO 1995016181A1 GB 9302516 W GB9302516 W GB 9302516W WO 9516181 A1 WO9516181 A1 WO 9516181A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- breech
- block
- weapon
- sear
- bolt
- Prior art date
Links
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
- F41A19/03—Shot-velocity control
- F41A19/04—Shot-velocity control by controlling the time of release of the firing pin or hammer
-
- 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
- F41A17/00—Safety arrangements, e.g. safeties
- F41A17/16—Cook-off prevention, i.e. prevention of spontaneous firing of a cartridge by chamber wall heat
-
- 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
- F41A19/12—Sears; Sear mountings
-
- 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
- F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
- F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
- F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
- F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
- F41A19/31—Sear arrangements therefor
- F41A19/32—Sear arrangements therefor for catching the percussion or firing pin after each shot, i.e. in single-shot or semi-automatic firing mode
-
- 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
- F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
- F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
- F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
- F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
- F41A19/33—Arrangements for the selection of automatic or semi-automatic fire
-
- 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
- F41A19/42—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer
- F41A19/43—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer in bolt-action guns
- F41A19/46—Arrangements for the selection of automatic or semi-automatic fire
-
- 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
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/78—Bolt buffer or recuperator means
- F41A3/90—Fluid buffers
-
- 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
- F41A3/00—Breech mechanisms, e.g. locks
- F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
- F41A3/78—Bolt buffer or recuperator means
- F41A3/90—Fluid buffers
- F41A3/92—Fluid buffers adjustable
-
- 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
- F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
- F41A9/01—Feeding of unbelted ammunition
- F41A9/03—Feeding of unbelted ammunition using screw or rotary-spiral conveyors
Definitions
- the invention relates to a fire rate control system for a gun such as a submachine gun or light machine gun.
- the mechanism to be described allows for the firing mechanism of an open-bolt or closed-
- Climb is caused by an excessive rate of fire.
- the weapon does not have sufficient time to return to its original point of aim before each successive round is fired on full auto.
- the general result is one round on target and thereafter a string of shots moving upwards and off target i.e. no control. Such lack of control over shot placement is obviously both dangerous and very undesirable.
- the mechanism to be described is shown as an alternative to the electronic rate control system employed in the BUSHMAN I.D.W. 9mm S.M.G (see PCT/GB90/01969) and was developed in parallel so as to share as many components as possible between the two versions A comparison of the two versions would show that except for the rate control units themselves, the majority oi the remaining parts are interchangeable between the two models An advantage of the new system lies in its simplicity and the reduction of moving parts in the trigger mechanism
- the invention seeks to avoid or at least mitigate the specified problems and other problems of the prior art.
- One aspect of the present invention provides a fire rate control mechanism which allows an
- open bolt or closed bolt S.M.G. or L.M.G. to be, upon firing, momentarily arrested in a cocked condition and then to be released to fire another round after a predetermined and preset lapse of time.
- Another aspect of the invention provides a trigger mechanism for a gun capable of fully automatic firing comprising a timing device operable to determine the rate of fire of the gun.
- which device cyclically interrupts means for discharging the ammunition to be discharged from the gun when a physically displaceable trigger of the mechanism is moved to a firing position.
- the timing device comprises a hydraulic or pneumatic device operatively connected to a bolt of the gun.
- a gun having a bolt decelerator.
- Another aspect of the invention provides a bolt decelerator or a fire rate regulator for a gun which is readily attachable and detachable from the gun.
- FIGURE 1 shows a sectional side elevation view of a trigger mechanism and rate control system according to the invention, in a cocked position
- FIGURES 2 to 6 show successive steps in the operation of the mechanism and system shown in Figure 1 during firing.
- the trigger mechanism functions as follows.
- the trigger 6 and secondary-sear 5 both pivot about shaft 12 and engage each other at face 19.
- the secondary-sear 5 engages the bolt 1 at bent 3.
- the cam hammer 7 pivots about shaft 13 and is connected to the rate control piston 9 at shaft 14.
- the cam hammer 7 engages the secondary-sear 5 at point 8.
- the rate control piston rod 10 is fixed to the frame 16 at shaft 15.
- the cam-hammer 7 would be locked out of engagement with secondary-sear 5 by a selector unit (not shown) and would be in a position as seen in Figures 5 or 6.
- For semi-automatic fire disregard the cam-hammer 7 and piston 9 in those drawings.
- FIG. 1 shows the weapon cocked and ready to fire.
- Main sear 4 is engaged with bolt 1 at bent 2.
- Trigger 6 has forced secondary sear 5 our of possible engagement with bolt 1 via contact at face 19.
- trigger 6 disengages contact with secondary-sear 5 at face 19.
- Secondary-sear 5 is now free to engage bolt 1 at bent 3 after a round has been fired.
- the bolt now is free to fly forward via a main spring force (now shown), strip a cartridge from the magazine, and chamber and fire said cartridge as seen in Figure 3.
- the force of the exploding cartridge sends the bolt 1 rearwards, where bolt 1 is engaged and arrested by secondary-sear 5 at bent 3.
- the trigger 6 When the trigger 6 is released, it engages the secondary-sear 5 at face 19 and forces the secondary-sear 5 to disengage from bent 3.
- the main-sear 4 Simultaneously the main-sear 4 has been allowed to come up and is ready to engage the bolt
- Secondary-sear 5 is forced out of possible engagement with
- Figure 1 shows the weapon cocked and ready to fire on regulated fully automatic fire.
- FIG. 2 shows trigger 6 pulled and main-sear 4 just disengaged from bolt 1 at bent 2.
- the bolt 1 is now free to fly forward, strip a cartridge from the magazine and chamber and fire
- the piston check valve closes and the resistance of the fluid trying to pass the piston head causes the piston to expand at a relatively slow and preset rate.
- Rates of fire as low as 100 RPM can be achieved.
- An infinite control between 'o' RPM and the full natural unregulated rate of the weapon can be achieved by altering the internal functions of the piston and the fluid viscosity. For example the size of orifices in the piston could be altered.
- the rate-control-piston in the Bushman was designed to serve a dual function.
- the rate- control aspect has been explained.
- the second function is as a decelerator for the bolt.
- the camming action as the bolt 1 hits the cam hammer 7 and the internal expansion spring within the cylinder 9 were designed to absorb a maximum of energy from the returning bolt. This has allowed for the use of a light weight aluminium breech and a very light weight bolt. All other open bolt weapons rely on a relatively heavy bolt mass to absorb energy in an effort
- this rate control system can
- a very important and key aspect of the instant invention is the use of a release unit to accomplish a timed interruption of the weapons cycle of fire.
- a preferred form of release is the use of a release unit to accomplish a timed interruption of the weapons cycle of fire.
- Rate control piston assembly 9 contains hydraulic fluid, fluid chambers and machine orifices for regulating the passage of
- Rate control piston assembly is commercially available from Ace Controls, Inc. of Farmington, Michigan, Model ti 92-1201-06.
- pins allow the removal of the rate control piston in the field, without tools. Depending on the desired firing rate, a particular firing rate control piston can be inserted into the weapon. Also, the removable pins allow the user to very easily replace a defective rate control piston.
- the pins 13 and 15 could for example be spring loaded and carry a locking finger such that they can be manually pressed and rotated into a locking arrangement with the finger engaged in a cooperating recess. Alternatively, the pins might be held in position by the pistol grip cover which in turn is secured by manually removable screws. Further, the piston device could be inserted into a cylinder formed in the pistal grip 16 such that a cover plate over the cylindrical hole secures the piston in place and causes the lower pin 15 to be retained by mechanical resistance at its ends. The top pin 13 might then also be retained by mechanical resistance for example from breech plates when the breech is closed such that the axis pins cannot move. Any configuration of these arrangements is possible. Also other pins such as pin 14 might be detachable to enable removal of piston 9.
- the rate control piston serves a dual function. The rate control aspect has been explained in the preceding paragraphs.
- the rate control piston serves as a decelerator for the bolt. The camming action which occurs as the bolt 1 hits the cam hammer 7, together
- aluminium breech and a very light weight bolt obviously contributing to the serviceability, reliability and maintainability of the weapon.
- open bolt weapons rely on a
- the rate control device as described has alleviated the need for a heavy bolt, thereby retaining the simplicity and safety of an open-bolt system, with first shot accuracy comparable to a closed bolt weapon.
- the inventive rate control system can be applied equally well to a closed bolt system.
- the fire rate control piston assembly of the present invention controls a weapons fire rate depending on the particulars chosed for each piston assembly, as has been discussed.
- the timed release of the breech-block of the weapon is a preset and predetermined quantity.
- the present invention is a fire rate control mechanism which allows an open bolt or closed bolt S.M.G. or L.M.G. to be, upon firing, momentarily arrested in a cocked condition and then to be released to fire another round after a predetermined and preset lapse of time and which provides a weapon which can function in either a semi-automatic mode or in an automatic mode.
- the present invention provides a fire rate control mechanism
- the present invention provides a fire-rate control mechanism which is simple in design, comprised of a minimum of parts, thus ensuring reliability of the mechanism.
- the present invention provides a fire-rate control mechanism which can eliminate
- weapon climb by limiting the firing rate to approximately 450 rpm or to whatever rate is determined, in practice, to eliminate climb for any particular individual weapon model.
- the present invention provides a fire-rate control mechanism which is both lightweight and compact enough to be positioned in the pistol grip of a weapon, thus not interfering with the position of the main spring or main spring guide rod or rear breech bolt buffer of the weapon.
- the present invention provides a fire rate control mechanism in which the fire rate control piston can be stored separate from the weapon and which can be issued and installed only when required.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9210300A GB2267558B (en) | 1992-05-12 | 1992-05-12 | Fire rate control system |
EP94902048A EP0733195A1 (en) | 1993-12-08 | 1993-12-08 | Fire rate control mechanism for a weapon |
AU56559/94A AU5655994A (en) | 1992-05-12 | 1993-12-08 | Fire rate control mechanism for a weapon |
PCT/GB1993/002516 WO1995016181A1 (en) | 1992-05-12 | 1993-12-08 | Fire rate control mechanism for a weapon |
BR9307907A BR9307907A (en) | 1992-05-12 | 1993-12-08 | Trigger mechanism for a firearm capable of firing fully automatically firearm firing speed control apparatus for an automatic weapon Process for controlling the firing speed of an automatic weapon and piston of a firearm regulator |
CZ961680A CZ168096A3 (en) | 1993-12-08 | 1993-12-08 | Mechanism for controlling fire cadence of a firearm |
US08/227,572 US5379677A (en) | 1992-05-12 | 1994-04-14 | Fire rate control system for a submachine gun or light machine gun |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9210300A GB2267558B (en) | 1992-05-12 | 1992-05-12 | Fire rate control system |
PCT/GB1993/002516 WO1995016181A1 (en) | 1992-05-12 | 1993-12-08 | Fire rate control mechanism for a weapon |
BR9307907A BR9307907A (en) | 1992-05-12 | 1993-12-08 | Trigger mechanism for a firearm capable of firing fully automatically firearm firing speed control apparatus for an automatic weapon Process for controlling the firing speed of an automatic weapon and piston of a firearm regulator |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995016181A1 true WO1995016181A1 (en) | 1995-06-15 |
Family
ID=27160099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1993/002516 WO1995016181A1 (en) | 1992-05-12 | 1993-12-08 | Fire rate control mechanism for a weapon |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1995016181A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE591381C (en) * | 1932-10-21 | 1934-01-20 | Simson & Co | Insertion device for firing small-caliber ammunition from machine guns |
US2748661A (en) * | 1952-12-10 | 1956-06-05 | Clarence E Simpson | Firing rate reducer for automatic firearms |
CH536995A (en) * | 1971-04-23 | 1973-05-15 | Eidgenoess Waffenfab | Machine gun |
WO1991009263A1 (en) * | 1989-12-16 | 1991-06-27 | Bushman Ltd. | Mechanism for controlling the firing rate of an automatic weapon |
-
1993
- 1993-12-08 WO PCT/GB1993/002516 patent/WO1995016181A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE591381C (en) * | 1932-10-21 | 1934-01-20 | Simson & Co | Insertion device for firing small-caliber ammunition from machine guns |
US2748661A (en) * | 1952-12-10 | 1956-06-05 | Clarence E Simpson | Firing rate reducer for automatic firearms |
CH536995A (en) * | 1971-04-23 | 1973-05-15 | Eidgenoess Waffenfab | Machine gun |
WO1991009263A1 (en) * | 1989-12-16 | 1991-06-27 | Bushman Ltd. | Mechanism for controlling the firing rate of an automatic weapon |
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