Firearms with rotary magazines

Details Firearms with rotary magazines Firearms with rotary magazines

1982-03-15

1984-06-12

Bentley, Stephen C.

Firearms

Breech loading

Sliding breechblock

42 395, 42 19, F41C 1300

Patent

active

044533292

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to firearms, and in particular to a re-chargeable magazine for a firearm. The invention is especially concerned with the provision of a firearm having a rotary magazine which can automatically supply a fresh round to the breech of a firearm so as to be ready for a fresh firing sequence to commence as soon as a spent case has been ejected.
Considerable importance is attached nowadays to obtaining a maximum of performance from a firearm with a minimum of bulk. The user requires an efficient weapon which is portable with the minimum of inconvenience. Magazines of firearms according to the present invention are capable of accommodating a number of rounds of ammunition therein so as to use space more economically than has previously been thought possible.
This factor is of particular importance in a weapon capable of firing ammunition of relatively large calibre, e.g. 4 cm, such as for example rounds comprising projectiles in the form of the so-called "rubber bullets", gas canisters, or grenades or other fragmentation devices. Accordingly the present invention has particular but not exclusive application to firearms of this type. Conventional practice is to provide a disposable magazine, so that when one magazine is exhausted it is removed and replaced by a fresh magazine, already loaded with fresh ammunition. Unless he throws away a magazine which is only partially exhausted, the user may therefore run out of ammunition and be obliged to change magazines at an extremely inconvenient moment. Normally there has been no possibility of re-charging a partially exhausted magazine without disengaging the magazine from the firearm. Where the firearm is for large calibre ammunition, this problem can be particularly acute because considerations of bulk prevent the use of a magazine capable of holding more than a few rounds.
An advantageous feature of the present invention is that it makes possible the provision of a magazine which can be re-loaded at any time with any number of rounds of ammunition up to its maximum capacity, without the necessity for removal of the magazine from the firearm.
According to the present invention, there is provided a firearm having a rotary magazine comprising through which a round of ammunition can be inserted or withdrawn, and around a remaining part of its circumference defining a circumferential restraint through which a round cannot be inserted or withdrawn; radially extending portions adjacent pairs of which define positive locations in which a round of ammunition can be accommodated on insertion through the opening, rounds being slideable longitudinally in said positive locations; particular bias direction; so that a round inserted through the opening is guided into one of said positive locations and simultaneously rotates the carrier against its bias; direction which can co-operate with one of the positive locations to positively retain the first-inserted round against circumferential and radial movement; and guide surface faces the opening whenever the carrier occupies the position corresponding to one in which the magazine contains less rounds of ammunition than its maximum capacity, the guide member being moveable against the bias direction during movement of the carrier corresponding to insertion of the final round so that the first-inserted round may then pass through the position occupied at other times by the guide means.
Conceivably the guide member restraining means might comprise a resilient guide bias means urging the guide member to move in the bias direction against a stop.
Advantageously, however, the restraining means comprises first locking means for positively locking the guide member to the body whenever the magazine contains less rounds of ammunition than its maximum capacity, the locking means being releasable automatically when the carrier moves against the bias direction as the final round is inserted.
Preferably second locking means are provided for positively locking the guide member to the carrier during insertion of the final

REFERENCES:
patent: 3745687 (1973-07-01), Koon

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