US PATENT SUBCLASS 89 / 137
.~.~ Interlocks between firing and cartridge feeding

Current as of: June, 1999
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89 /   HD   ORDNANCE

125  DF  AUTOMATIC {14}
132  DF  .~ Firing device operation or control (e.g., full automatic) {12}
137.~.~ Interlocks between firing and cartridge feeding {1}
138  DF  .~.~.~> Locks bolt open

DEFINITION

Classification: 89/137

(under subclass 132) Guns having interlocks between the firing mechanism and cartridge feeding mechanism.

(1) Note. Usually the interlock is designed to prevent firing when the magazine is empty, or removed from the gun.