DE396623C - Switching device for electric machine gun control for aircraft - Google Patents

Description

GERMAN EMPIRE

ISSUED

Al June 11, 1924

REICH PATENT OFFICE

PATENT LETTERING

. CLASS 77h GROUP 5

(V 17806 Xllj-jh *)

Vickers Limited in Westminster, London.

Circuit device for electric machine gun control for aircraft. Patented in the German Empire on September 30, 1922.

According to the Union Treaty of June 2, 1911, priority is due to this application of the application in England on September 30, 1921.

The object of the invention is a; So far, a contact pre-electrical has been used for this Firing device for car, direction ο. Like. Used with the Promatic Firearms on aircraft that! pellenvelie was connected or in between the propeller blades was steered through fire and only then a current should and electrically ignited or flapping ■ allowed if there is no propeller blade in the

use ammunition, in the latter case: trap

Line of fire stood.

The trigger mechanism is actuated electromagnetically, taking into account the firing delay angle at high propeller speeds

chains but the still possible contact angle is extremely small, so that the current for the Abfeueruntgsstromkreis lasts only a very short time. Weapons have also been created that automatically closed an auxiliary contact in the Albfeuerungsstromkreis only after the breech had returned to fire readiness, so that premature firing was impossible. But since the automatic weapon has its own operating period and is independent of the propeller speed, it can happen that the switch is about to interrupt the current again when the weapon closes it after the return parts have returned to readiness for firing. In this case, the duration of the current connection is extremely short. When using electrically ignited ammunition, however, the duration of the current connection must be at least equal to the time required to ignite the primer, and when using impact ammunition it must be equal to the time required to operate the trigger mechanism electromagnetically. Through experiments it was found that for electrically fired ammunition, this time period is of the order of a thousandth of a second, that furthermore the just permissible contact angle in a two-blade propeller is about the size of assembly 9 ⁰ has. At 1200 revolutions per minute this results in a current circuit duration of ¹ Z ₈₀₀ seconds, provided that the weapon keeps its auxiliary contact closed from the start, so that the full o ⁰ contact j can become effective. Accordingly, the con-; The cycle time of the switch is of the same order of magnitude as the time required to ignite ammunition and must therefore not be significantly reduced.

According to the invention, the control device is designed such that the conclusion of the Firing circuit through the propeller blade position in association with the position of the closure is determined while the duration of the electrical connection is increased igniting ammunition by the time it takes to detonate, with impact ammunition by the time required to operate the electromagnetic trigger is determined.

The invention is illustrated for example in the drawing.

Fig. Ι shows their application schematically on a weapon with electrically ignited ammunition at the moment of firing.

Fig. 2 shows the same arrangement after the shot.

Fig. 3 shows a similar arrangement with a fire switch in the safety position.

Fig. 4 shows the arrangement according to Fig. 1 applied to a weapon for impact ammunition.

Fig. 5 shows a practical embodiment of a fire switch.

Figs. 6, 7, 8 and 9 show the Fig. 1, 2, 3 and 4 analogous illustrations of another embodiment of the invention. ; In Fig. Ι - i is the switch that is set in rotation by the propeller and here consists of a disk with a groove into which a projection of a resilient contact arm A ¹ fits, which is pressed through the disk against the fixed contact a ¹ if the target is out of the firing position, however, releases the contact. : when the target, as in Fig. 1, is in the firing position. B is a resilient contact arm, which is actuated by part B ^{1 of} the breech block in such a way that it moves away from a stationary contact b (as shown in Fig. 1) when the weapon is ready to fire. If the bolt goes back when firing, the contact arm B closes the contact at h (Fig. 2). The part B ¹ is connected to the firing circuit for electrically detonated ammunition b ¹ through a connection B ″ .

C is an electromagnetically operating contactor and 'C _{1 is} its control coil. This contactor has resilient monitoring: in the firing position, it assumes the position shown in Fig. 1 and in turn keeps the firing circuit closed. The control current through the coil C ¹ is interrupted by the contact arms A ¹ and B in this particular case. The disk A, which is driven by the propeller, continues to rotate immediately afterwards; then the contact arm A ¹ comes against the contact σ ¹ , but without being able to close the control current through the coil C ^1. As Fig. 2 shows, this circuit is only closed when the contact arm B has come into contact with the contact h as a result of the retraction of the closure parts.

Activation of the coil C ^{1 of} the contactor brings the switching lever C 'into the position shown in Fig. 2, in which the firing circuit is interrupted. In this way ■ contact arms A ¹ and B are able to determine the appropriate moment, the current closure, while the ammunition even the duration of the activation of the firing current determined! By remaining closed, despite the change in position of the disc A J current until the Gun fires. The current source D serves here at the same time to supply the control circuit and the firing circuit.

Starting from the position shown in Fig. 1, in which the disc A and the contact arm 'B occupy the position that

allows firing of the weapon, current flows from the positive pole of the battery ü through a switching arm e ¹ , the switch C, the block B ² and the cartridge b ¹ to the negative pole. If, even before the cartridge could come to detonate, the disc A in the position shown in Fig. 2 and 3 position passes over and the contact A to the contact ¹ et ¹ brings into contact with the current path described above is not changed. But as soon as the cartridge detonates and consequently the breech of the weapon is actuated, the contact arm falls !? to contact b, and the current now flows through e ¹ , b, B, the pivot point of A ¹ and ¹ the coil C ¹ back to the negative pole. The switch C is consequently in the position according to Fig. 2 üf: er accomplished, so that when the contact arm B by dropping the weapon in the firing position

is opened before the groove of the disc A j occurs in front of the end of the contact arm A ¹ , the \ fire circuit at C is interrupted. \ If, however, the disc ^ the position after subscription. ι assumes, the control circuit is interrupted via C ¹ , and 'the switch C then goes into the position after Abi>. 1 above to close the fire circuit.

The arrangement according to Fig. 4 is generally that according to Fig. 1, 2 and 3 ahn- j borrowed, only the firing circuit contains the electromagnet B ^x , which brings the firing pin to the trigger. In addition, a manually operated fire switch is provided, which consists of two Schaitanmen e, e ¹ , of which the first in the control circuit, the second in the firing circuit ■ is switched. The arrangement is ι so made that the switching e j for the steering committee that includes before the \ shifting e ¹ is closed for the Abfeuerungsstromkreis and that e is open, as soon as j e is closed ^first If the fire switch is switched to the firing position, then; the switch e first closes the control j circuit and thereby causes j interruption of the firing circuit through j the contact device C of the controlled contactor, apart from the fact that the disconnection. firing circuit is also interrupted by the open 1 switching arm e ¹ . When the fire switch is switched on, the firing circuit is closed at switch e ¹ and 'the control circuit through the'; E Schaltann opened; the contactor C of the contactor remains open until the control current of the contactor is interrupted by one of the control ^{contact arms. -I 1} or B.

In Fig. Ι to 4, the fire switch is shown purely schematically; Fig. 5 shows an exemplary embodiment of the same. Here e, e ^{1 are} the two contact arms for the control circuit. the contactor control or for the firing circuit in Fig. 1 to 4. Like a third contact spring V, which is connected to one pole of the current source D , they are firmly mounted. The moving part of the switch is formed by an insulating drum B , which has three electrically connected insert strips, e-, e ³ and e * . The safety position of the fire switch is shown. A rotation of the drum E in the direction of the arrow first creates a connection between the power source and the control circuit, then a connection between the power source and both circuits (control circuit and firing circuit) and finally, while maintaining the connection between the power source and the firing circuit, the connection is interrupted the power source with the control circuit.

Figures 6 to 9 illustrate another embodiment; the contact arm A ¹ is lifted here by the disk ^ from the stationary contact a ¹ when the disk is outside the firing position. Fig. 6 shows the firing position, in which the arm A ¹ against the contacts ¹ rests. The spring contact arm B, by Rücklauftailen the weapon loading go actuated, bears against a fixed contact b as Figure 6 shows, appropriate when the weapon is ready to fire. during the return of the firing weapon, the contact arm B moves away from the contact & ■ and opens it (A ¹ Jb. 7). The switching device ¹ C is under spring action and takes the in Ab ') to fire. 6 a position shown in which it rests on a fixed contact c. The holding arm C is connected to one pole of the power source D, for example the positive pole, via the fire switch E , and the fixed contact c is connected to the contact arm A ¹ . The contact ä ¹ is connected to the positive pole of the power source; the control ^{coil C 1 of} the contactor is connected on the one hand to the contact arm A ¹ and on the other hand to the contact arm B.

In the firing position (Fig. 6) current goes through the fire switch E, the contact a ¹ , no arm A ¹ , the contactor coil C ¹ , the arm B and its contact b to the negative pole of the power source D, so that the control coil of the contactor is activated and the contact arm C rests against contact c . The firing current can then flow over two parallel circuits, one of which is the switching device C, the block B ", the cartridge b ¹ , the arm B and its contact b, the other serving the arm A ¹ and the parts B ² , l · ¹ , B and B. If the weapon has not yet fired after the switch “Ί has moved this far

has moved further that the arm A ¹ is lifted from its contact a ¹ , then current can still flow through the control ^{coil C 1 of} the contactor, as well as through the first of the two circuits, as Fig. 6 shows; and this stream continues to be closed. until the gun fires, whereby the first circuit in response to movement of the contact arm B from its contacts b gone, the second ίο is interrupted by the coil C. ¹ As a result of the disconnection of the contactor coil C ¹ , the contactor C then rises . from his contact c . This condition is illustrated by Fig. 7. When the return parts of the weapon return to the ready-to-fire position, arm B rests against its contact b again. Until switch A takes on the firing position shown in Fig. 6 again, no current can flow through the ammunition because contactor C keeps the firing circuit open; but as soon as the arm A ¹ can lay against its contact α ¹ , the circuit is closed by the coil C ¹ and the contactor is activated, the arm C moves into the position shown in Fig. 6, and the firing circuit is in this way closed again.

The fire switch E is a simple switch in one of the main lines of the power source D; when this switch is set to "safe" as in Fig. 8, all circuits are simply interrupted so that the weapon cannot fire. The arrangement according to Fig. 9 is similar to that according to Fig. 6, 7 and 8, only the firing circuit contains an electromagnet B *, which is used to pull the cock or the firing pin of the weapon.

Claims (5)

Patent-to sayings: i. Circuit device for electric machine gun control for aircraft, in which the time of the power cut is determined by the propeller position and the readiness of the weapon to fire, characterized in that contacts (A ¹ , B) actuated by the propeller and the weapon are connected to a control circuit are that the firing circuit remains closed after its closure due to the joint action of these contacts until the weapon is fired, so that the duration of the current connection in the firing circuit with electrically ignited ammunition by the time it takes for detonation, and with impact ammunition also by time is determined that the electromagnetic trigger device needs to operate. 2. Circuit device according to claim ι with an electromagnetically controlled Contactor for the firing circuit, which is in the circuit of a switch driven by the propeller shaft is characterized in that the opening and closing of the firing circuit is regulated such that the switch circuit is open for so long and the firing circuit is closed for so long remains when the propeller position allows the shot, while the switch circuit is closed for the remainder of the propeller rotation. 3. Circuit device according to claim ι and 2, characterized in that that the currentless contactor keeps the firing circuit closed and only interrupts it when it is over the closed Contact of the weapon not ready to fire is controlled, so that by means of a closed by the controlled contactor itself Auxiliary contact the interruption is maintained as long as the one connected in series with the auxiliary contact Contact device for the propeller position does not remain closed properly for the shot. 4. Circuit device according to claim ι and 2, characterized in that the SteuerspuJe of the contactor and the Firing circuit in parallel and in series with the contacting devices of the weapon ready to fire and the propeller position, so that the first double-dependent closure of the firing circuit, the contactor is also controlled and a parallel contact to the propeller position contact closes so that the contactor control current and the firing stream is maintained until the weapon fires. 5. Circuit device according to claim 3, characterized in that im Firing circuits or a single or multiple fire switch is provided in the circuit for contactor control, which replaces the contact for the readiness of the weapon to fire or serves to electrically connect the entire device to back up. For this purpose ι sheet drawings.