GAS REGULATOR - IGNITION

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.

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DEFINITIONS
GAS REGULATOR - IGNITION

GAS REGULATOR
Automatic weapons in their rapid firing cycles are subjected to a variety of metallurgical changes of heat and friction which effect the operation. This coupled with ammunition variety performance requires a means of adjusting the reciprocating action of the bolt assembly for smooth performance under such conditions. The gas regulator is one of the items that provide such an adjustment. It is mounted into the piston cylinder with a series of holes sizes for rotary adjustment. The gases from the barrel gas port pass through one of the regulator holes to accomplish the function.

GRAVITY FEED
Ammunition is fed into the weapon’s mechanism by gravitation.

HEADSPACE, CARTRIDGE
A most critical dimension especially in automatic weapon mechanisms. Headspacing is generally termed as the distance from the face of the bolt or breechblock to the shoulder of the barrel where the cartridge case seats or that part of the barrel chamber that stops forward movement of the cartridge case. Headspace for rimmed cartridges is defined as the distance from the face of the bolt or breechblock to the face of the barrel. The distance for rimless cartridges is measured from the face of the bolt or breechblock to the front [upper shoulder] of the barrel cartridge chamber. Although critical this tolerance is very minute as measured in single digit millimeters.

Excessive headspace allows the cartridge not to be fully seated or to become unseated from the barrel during its ignition. The resultant is over expansion or bursting of the shell casing. Insufficient headspace may prevent the breechblock or bolt from fully seating in its forward position and prevent the locking mechanism from functioning causing the weapon not to fire. Over heating and metal expansion is a common cause of this condition where adequate means are not provided to compensate for the problem.

IGNITION
The igniting of cartridge propellant by its primer.