CLOSED AND OPEN BOLT SYSTEMS

THIS 62 PAGE BOOKLET CONTAINES OVER 100 PHOTOS AND INCLUDES SEVERAL PAGES OF PATENTS / APPLICATIONS. ALL INCLUSIVE IS A HISTORY, CLASSIFICATION OF VARIOUS PATTERNS AND GENERAL SPECIFICATIONS.

THE AUTHOR

KIJIRO NAMBU

NAMBU MACHINE PISTOLS

THE AUTHOR

KIJIRO NAMBU

NAMBU MACHINE PISTOLS

ARTICLES

AIR CRAFT WEAPONS

From some 230 BIBLIOGRAPHICAL REFERENCES,

this literary work is composed of

542 PAGES with

686 ILLUSTRATIONS, including patent drawings and descriptions.

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THIS 62 PAGE BOOKLET CONTAINES OVER 100 PHOTOS AND INCLUDES SEVERAL PAGES OF PATENTS / APPLICATIONS. ALL INCLUSIVE IS A HISTORY, CLASSIFICATION OF VARIOUS PATTERNS AND GENERAL SPECIFICATIONS.

YOU ARE HERE:: HOME: DEFINITIONS: DELAYED BLOWBACK - FIRING CYCLE

DEFINITIONS
DELAYED BLOWBACK - FIRING CYCLE

DELAYED BLOWBACK
Related directly to automatic weapons it is a design condition where the bolt is not locked at the barrel for the duration of the bullet’s travel through the barrel until the chamber pressure has decreased. The system is basically a blowback principal with the added feature of slowing down the travel of the bolt during its opening movement. This feature may be any of several designs depending upon its needed function. Most common is a type of locking mechanism, which proceeds to unlock at recoil but delays total unlocking of the bolt. This feature has also indicated improvement of heat dissipation and lessens barrel temperature activity.

DISCONNECTOR
For most automatic weapons, this unit is part of the selective fire mechanism feature and may be sometimes confused with the sear. Its function is to disconnect the trigger from its attached mechanism upon a round being fired thereby preventing an additional round discharge without trigger positive function. Its purpose is to allow only one round fired with each function of the trigger. It is usually operated by a selector switch, which can function for single round or automatic operation.

EJECTION
The forceful mechanical action of discharging a cartridge, fired or unfired, from a firearm.

EXTRACTION
The first step in the forceful action of the extraction/ejection sequence by removing a cartridge from the barrel chamber.

EXTRACTOR
A spring loaded metal hook or claw, as part of the weapon’s bolt assembly, that engages the rim of a cartridge during its chamber seating. Its function is to withdraw the spent cartridge from the barrel during the rearward movement.

EXTRACTOR GROOVE
The groove at the base end of a cartridge next to the rim which provides for seating of the extractor.

FEED STRIPS
A system for feeding ammunition into automatic weapons. The strips, or trays, are generally of light metal that the cartridges are held into in a “clipped” fashion. The strips are fed into the weapon from either side determined by design necessity. Some designs were made of strips to be latched together for continuous feeding. The ammunition is stripped from the trays by the actuating system and fed into the barrel chamber. When all ammunition is emptied from the strip it is discharged thru the opposite side of the weapon.

FIRING CYCLE
The action order of an automatic weapon as [1] loading, [2] firing, [3] extracting, [4] ejecting, [5] reloading.

DEFINITIONS