Apparatus and method for dispensing incendiary projectiles
An apparatus and method for dispensing incendiary projectiles is provided. The apparatus includes an injector for injecting the projectiles with a reactant at a dispensing rate, and a controller operable to control the dispensing rate. The controller is operable to control solenoids of a dispenser gate and a shuttle motor, and to prevent jam conditions of the apparatus. The apparatus can detect and automatically correct jam conditions that do occur. The apparatus can count the number of incendiary projectiles dispensed during a current operation and during the lifetime of the apparatus. The apparatus is dimensioned to minimize the number of incendiary projectiles purged from the apparatus after an operator has indicated to stop dispensing.
1. An apparatus for dispensing from an aircraft projectiles containing incendiary material, the apparatus comprising:
(a) a base adapted to being removably mounted to the aircraft;
(b) a chute operable to expel the projectiles to fall away from the aircraft;
(c) a hopper operable to store discrete unitary unprimed projectiles;
(d) a feed mechanism cooperating with the hopper to extract unprimed projectiles from the hopper and provide a queue of unprimed projectiles;
(e) a dispenser gate connected to the feed mechanism, the dispenser gate having one or more gate passages and being operable to open to unblock movement of unprimed projectiles through the gate passages in response to a gate signal;
(f) an injector connected to the dispenser gate that receives unprimed projectiles from the dispenser gate and injects the projectiles at a dispensing rate with a reactant to prime the projectiles, and then conveys the primed projectiles to the chute; and
(g) a controller operable to provide the gate signal to the dispenser gate and to control the dispensing rate of the injector in response to a desired dispensing rate, and wherein said controller is operable to detect a jammed condition of the apparatus.
2. The apparatus of claim 1 wherein said controller is operable to limit a momentum of said injector when injecting the projectiles during an initial phase of operation of the apparatus.
3. The apparatus of claim 1 wherein said controller is operable to correct said jammed condition.
4. The apparatus of claim 3 wherein:
a. the injector comprises a shuttle operable to reciprocate in response to output rotation of a shuttle motor;
b. the controller is operable to control the dispensing rate by controlling an output speed of the shuttle motor; and
c. the controller is operable to receive as an input a first indication of the output rotation and operable to control the dispensing rate by varying electrical power supplied to the shuttle motor in response to the first indication.
5. The apparatus of claim 4 wherein the controller is operable to prevent the shuttle from starting to reciprocate until a shuttle delay has elapsed after the dispenser gate has been opened.
6. The apparatus of claim 5 wherein the controller is operable to limit a momentum of the injector when injecting the projectiles during an initial phase of operation of the apparatus.
7. The apparatus of claim 5 wherein the dispenser gate comprises a gate pin for closing each of the gate passages, the dispenser gate being dimensioned such that no more than one projectile fits in each gate passage between the gate pin and the shuttle.
8. The apparatus of claim 7 wherein the dispenser gate comprises a gate closing solenoid for urging the gate pin toward a blocking position when the gate closing solenoid is energized, and a gate locking pin for maintaining the gate pin in the blocking position when the gate closing solenoid is de-energized.
9. The apparatus of claim 5 wherein the controller is operable, in response to the dispenser gate being closed, to de-activate the shuttle motor after a purge delay has elapsed.
10. The apparatus of claim 4 wherein said injector is operable to inject the projectiles with an amount of reactant that is independent of said dispensing rate.
11. The apparatus of claim 4 wherein the controller is operable to count the number of the projectiles being dispensed in response to the first indication of the output rotation.
12. The apparatus of claim 4 wherein the controller is operable to control the dispensing rate by receiving as input a second indication of a desired dispensing rate, and varying electrical power supplied to the shuttle motor in response to the first and second indications.
13. The apparatus of claim 3 wherein the controller is operable to detect a jammed condition of the apparatus by determining that an output speed of the shuttle motor has been lower than a critical shuttle motor speed for at least a critical length of time.
14. The apparatus of claim 13 wherein the controller is operable to correct the jammed condition by causing the shuttle motor to operate in a reverse direction during a reverse direction time delay.
15. The apparatus of claim 1 wherein said injector is operable to inject the projectiles with an amount of reactant that is independent of said dispensing rate.
16. The apparatus of claim 1 wherein said controller is operable to count the number of the projectiles being dispensed.
17. The apparatus of claim 1 further comprising a fire extinguisher mechanism operable to contain extinguishing agent, the controller being operable to prevent dispensing of the projectiles when the fire extinguisher mechanism contains an insufficient amount of the extinguishing agent.
18. The apparatus of claim 17 further comprising electrical storage means to provide electricity to the fire extinguisher mechanism when electrical power is not otherwise being supplied to the apparatus.