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1. WO2007138594 - ELECTRIC SAFETY DEVICE ACTUATOR

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

ELECTRIC SAFETY DEVICE ACTUATOR

FIELD OF THE INVENTION

The present invention relates to safety mechanisms of firearms.

BACKGROUND OF THE INVENTION

Most firearms employ a safety mechanism, also known as "Safety" that prevents unintentional firing. In some firearms, the safety is actuated by shifting sideways of an actuation bar. The FN MAG 58 machine gun is an example of such a firearm, wherein pushing the cross bolt safety lever to the right disables the firing. Moving the lever to the left disengages the safety catch from the sear, thereby removing restraints from the trigger.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic description of safety selector of the invention and the actuating electric motor;
Fig. 2 is a schematic description of safety selector of the invention showing the cross bolt safety bar.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

In most guns and machine guns a safety device is available that can be put into effect to prevent unintentional firing of the firearm. In FM MAG guns the safety device may be actuated only when the gun is cocked. The safety device is put into effect by shifting what is known as cross bolt sideways in a specific direction. The cross bolt in this case shifts sideways to either of two directions

The present invention provides an electrically operated appliance that can useful for shifting sideways a cross bolt either way to put into effect a safety mechanism or when contemplated, to undo the safety lock permitting firing. To describe an example of a preferred embodiment of the instant invention, reference is first made to schematic Figs 1A-1B. A two-pronged fork is rotatable sideways to urge the cross bolt to either left or right position. In Fig. 1A safety selector 20 has two prongs 22. Vertical pivot 24 provides for rotational movement of the fork, the force to which rotating is applied by electric motor 26. In Fig. 1B more structural and functional aspects of the device are illustrated. Axis 38 is the rotational axis provided by pivot 24.The torque for rotation provided by the motor, not shown, is transferable through motor's pivot 40. In this example, cam 42, rotatable with pivot 40 around longitudinal axis 44 urges pin 46 to move horizontally in a path schematically described by double headed arrow 48. Movement of pin 46 in one direction, established an opposite movement of the prongs in an opposite direction. Bar 52 is the weapon's external lever that implements a selection between firing enabled and firing disabled positions.

The torque transfer mechanism from a motor to a load, in this case a safety selector described above is only an example. Many other torque transferring mechanisms are known in the art, such as gears using toothed wheels or frictional belts, chains etc. The torque can be applied from the motor to any part of the safety selector as desired by good engineering practices or altered by constrains such as space limitation. Torque from the motor can also be applied to a pivot of the appliance.

"Over center toggle" feature

As known in the art, typically of switch making, a selector lever is urged to assume either of two positions. Both alternative positions are urged, by a spring usually, so that an intermediate position is prevented.

Function of the electrical motor

The electrical motor that actuates the safety selector is typically a DC motor responding to polar DC input by turning in a first direction. Changing the polarity of DC supply to the motor changes the turning direction of the motor, and the output torque transferred by the motor's axis changes direction correspondingly.

Firearm application

The invention can be implemented in firearm employing across bolt type safety devices in which the external actuation lever is linear and shifts horizontally, as for example in the FN MAG machine gun. In autonomous posts in which the firearm is actuated by remote control, the device of the invention naturally lends itself to such control.

Benefit provided by applying the invention

As indicated above, the device of the invention is especially useful in cases in which the subject gun or machine gun are autonomous and may be actuated automatically or by remote intervention of a supervisor. The safety selector of the invention can be implemented in an isolated land outpost as one example, and also in autonomous vehicles and autonomous vessels carrying guns.