DE293604C - Device for inhibiting the movement of the cinematographic image projected onto the target - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 293604 CLASS 72 e. GROUP

in Berlin.

cinematographic image.

Patented in the German Empire on December 10, 1912.

The invention relates to a device for inhibiting the movement of the cinematographic image thrown through a target when firing a Shot's affected electrical circuits. The invention consists essentially in that simultaneous with the closing of the circuit, which is the inhibition of the movement of the cinematographic image causes a second circuit including a solenoid is closed, the core of which in its in a manner known per se on a Movement that can be set for a certain period of time at the end of this movement by means of an interruption a contact interrupts the circuit causing the inhibition, at the same time the solenoid is de-energized and the core in its original, influencing the magnetic coupling of the cinematograph Location returns.

Further, according to the invention, the movable contact carried by the core of the solenoid becomes used to close another circuit in the highest position of the core, through which the in itself known Way, consisting of a back-and-forth screen consisting of a strip of paper wound on rolls, is switched further in such a way that that the last bullet hole is covered.

In the drawing, the subject matter of the invention is shown, for example, for a device in which when a shot is fired as a result of the sound waves generated and picked up by a microphone the electrical circuit which causes the inhibition of the cinematograph will, namely shows:

Fig. Ι the scheme of the entire device, and Fig. 2 the device for switching of the paper strip forming the screen.

When a shot is fired, the sound waves captured by the microphone 14 generate a vibration current in the transformer 16, which a similar current in the relay 18 induced. The oscillation of the relay tongue 21 causes the battery 23 to be fed Circuit in which the electromagnet 24 is switched on, interrupted. This has the consequence that the magnet 24 armature 25 that has been attracted falls down under the action of the spring 26 and the contacts 27 and 28 closes, so that the one fed by the battery 30, the escapement of the cinematograph causing circuit 30, 31, 32, 33, 24, 25, 28, 47, 3, cinematograph, 48 and 30 is closed. Furthermore, when the armature 25 falls, the following circuit is established, which affects the magnetic coupling of the cinematographic machine, interrupted : Battery 30, lines 31 and 32, frame 33 of relay 24, armature 25, contact 39, line 40, contacts 41, movable contact 42, line 43, contacts 44 and 45 and line 48 back to battery 30.

When the armature 25 falls, 6g simultaneously becomes a second through the contact 27 Circuit closed in which a solenoid 49 is switched on. As a result of the excitement of the solenoid 49, its core 50 is pulled up, with the movement of the latter

Is regulated by a brake cylinder 51 or the like. When the core 50 goes up the line of the circuit influencing the magnetic coupling interrupted a second time by the movable contact 42 carried by the core 50 comes out of contact with the contacts 41. This circuit remains that way at this point long interrupted until the core 50 comes down again. This is done after the core 50 has reached its highest position in which it is in contact with a bolt 60 comes and through mediation of the same interrupts the contact 35, 36. As a result, the armature 25 is lowered Position holding magnet 29 de-energized, so that the armature 25 is in its original, raised Position returns and the contact 39 closes again, at the same time the contacts 27, 28 to be interrupted. As a result, on the one hand the solenoid 49 and the core 50 are de-energized quickly returns to its position shown in the drawing, while on the other hand too the circuit causing the inhibition of the cinematograph by interrupting the Contacts 27, 28 is interrupted again. After the core has subsided, will the circuit influencing the magnetic coupling of the machine again through the movable contact 42 closed.

As a screen on which the moving image is generated by the cinematograph a strip of paper or the like guided back and forth is used in a manner known per se, which unwinds from one roll and winds on another roll, in such a way that through a slight movement of these rollers the shot hole is covered again. Also the Movement of these roles takes place automatically shortly before the restart of the Image moving machine by adding another when moving the core 50 upwards Circuit is closed that affects the movement of the rollers.

This circuit runs as follows: When the core 50 goes up, the movable contact 42 comes into contact with the contacts 53. The current then flows from the battery 30 along the line 31, 52, contact 53, through contact 42, contact 53, line 52 to the solenoid 54 and from there through the line 38 back to the battery 30. When energizing the solenoid 54, the ^{Armature 55 attracted so that its end rotates a gear 54 1} , which is arranged on the shaft 63, during each downward movement in the manner of a ratchet. A gearwheel 64 is also keyed on the shaft 63 and meshes with a gearwheel 65 seated on the shaft 68 of the roll 58 of the paper strip, in such a way that the paper roll 58 is indexed further when the solenoid 54 is energized. When the solenoid 54 becomes de-energized, the armature 55 returns to its normal position under the action of the spring 69, the ratchet wheel 54 ¹ being able to move freely backwards. The pawl 66 engages the ratchet wheel 67 and in this way prevents any backward movement of the roller 58.

To prevent the strip from unwinding too easily from the roll 58, around the latter placed a suitable brake band.

The period of time during which the movement of the image is inhibited is determined by the Brake cylinder 51 determines which only a slow upward movement of the core 50 allowed, while the backward movement of the core 50 is sudden, by the piston 61 moving in the liquid containing cylinder with a corresponding one Valve is provided.

Claims (2)

Patent Claims: 1. Device to restrain movement of the cinematographic image thrown at a target is influenced by one when a shot is fired electrical circuit, characterized in that at the same time as closing of the circuit that inhibits the cinematograph is a second circuit is closed, in which a solenoid is switched on, its slowly drawn in Kern interrupts contact at the end of his movement, whereby the solenoid is de-energized and the one that inhibits the cinematograph The circuit is interrupted again, the core of the solenoid being replaced by a contact carried by him interrupts the circuit influencing the magnetic coupling of the cinematograph and closes so that the restart of the cinematographic image after takes place automatically after a certain, adjustable time. 2. Device according to claim 1, characterized characterized in that the one carried by the core (50) of the solenoid (49) is movable Contact (42) in the highest position of the core closes another circuit, which the further switching of the causes the screen forming, wound on rolls of paper strip, so that the indexing of the screen takes place automatically each time the image is restarted. 1 sheet of drawings.