Multi-caliber dimensional inspection device for an assembled cartridge

Abstract

A dimensional inspection device for a cartridge includes a measuring body defining a first free body end with a first reference surface, and a second free end with a locking surface. The measuring body defines a cavity including a hole for receiving a cartridge and defining a hole axis, a hole end opening facing the first reference surface, and an opposite hole end bottom. The measuring body includes a threaded through hole coaxial with the hole axis between the hole bottom and the second free body end. An adjusting screw engages the threaded hole so rotation of the screw displaces the second reference surface along the hole axis. A lock washer has a threaded washer hole engaged with the screw body outside the measuring body so upon rotation, the lock washer moves. The lock washer clamps against the measuring body, locking the adjusting screw.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a dimensional inspection device of an assembled ammunition cartridge, which will be named “recharged” hereinafter for the sake of convenience.PRIOR ART[0002]It is known that a cartridge comprises a case having a front opening and a bullet engaged by interference in said front opening of the case, whereby closing it.[0003]The case houses an explosive charge inside it, which, when activated, produces a sudden increase of pressure inside the case, which is high enough to push the bullet forwards, separating it from the case and imparting a very high kinetic energy to the capable of firing at very high distance.[0004]In some fields, particularly in the recreational field, such as target shooting, dynamic shooting and hunting, it may be desired to retrieve the cases of the exploded cartridges and to “recharge” them with a new powder, primer and a new bullet, or to buy the bulk components and assemble a new cartridge with the sa...

AI Technical Summary

Benefits of technology

The present invention provides a dimensional inspection device and method for inspecting the dimensions, or overall length, of a recharged cartridge. The device is quick and easy to use, allows for quick reconfiguration to inspect different types of recharged cartridges, and is conveniently portable and cost-effective to manufacture. Additionally, the device makes it easy to adjust the device's characteristics based on the kind of cartridge being verified. Overall, the invention solves the technical problem of providing a reliable and efficient means for inspecting the dimensions of recharged cartridges.

Problems solved by technology

However, cartridge recharging is an extremely critical operation because of the risk of harm to the user or to people near the user while shooting due to imperfect recharging.

If the burst chamber volume is different from the predetermined chamber volume value, the behavior of the cartridge becomes uncontrollable while shooting.

For example, if the chamber volume is smaller than the predetermined chamber volume, excessive pressure may be generated inside the cartridge, which could damage the gun's barrel.

If, instead, the chamber volume is higher than the predetermined chamber volume value, and consequently the overall cartridge length is greater than the predetermined cartridge length, the greater overall cartridge length would cause jamming in semi-automatic weapons.

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