SU25044A1 - Fire prevention device for film projector booth - Google Patents

Description

Loit W Store (Fig. 4), the current; i3 network through clamp 1 (Fig. 1), the contacts of the electromagnets A and the clamp 4 will pass through the switches L and C, the contact Y and the clamp 3 to the clip back into the network, excited electromagnets A prut; chickpeas measles B, and attached to it

the spring contacts X will come in contact with the contacts L and the Mo-fopa circuit connected to terminal 7 is closed. With a further pull of box B by electromagnets A, the current passed through

Measles and case of cores E of electromagnets, clip 6 of the window and clip 5, will go to solenoids controlling the raising of the flaps in the windows of the booth and the fire damper lamp. When elevating the cor B, its end B is disconnected from the mercury switch T, and the light in the auditorium is turned off.

If the circuit is opened by Lily C switches or by contact Y, current will no longer flow into electromagnets Ai, measles B will drop down due to its gravity, the circuit of window and motor valves will open and mercury switch T will close and turn on the light in the hall.

The device for cutting the ignited film F (Figs. 3 and 4) consists of a rotary sleeve H installed at the entrance slit Ы of the upper magazine W. The sleeve H is equipped with a finger G with a bolt G, to which the pyroxyl newer Af is attached, pushed over the roller P and fixed to another its end on the tide of the shch of the store Sh, On the back of the store (fig. 4), there is a spiral spring O, which

one end rests on key J /, and the other is secured on each axle To the hub axle / L At the same position A, a spring contact 17 is fastened. 17. insulated from the case of the shop W. When the film ignites, the thread /. the finger G, as a result of which the sleeve I, under the action of the spring O, rotates by 90 °, cuts the film and closes the entrance slit Y of the magazine W. At the same time, contact P moves away from contact Y and the picture stops.

The subject matter of the invention.

A fire prevention device for a film projector booth, in which the electric motor is stopped, the windows are closed with shutters and the light is turned on in the hall through a system of electromagnets or solenoids connected to the common electrical network, and a rotating sleeve is used to cut the film, using a special contact spring /, worn on the axis of the rotary sleeve //, located at the upper store W and activated when the thread f is ignited, the spring L together with the contact serves for inclusion in a network of the electromagnets, the armature of which is provided with spring contacts Jf, X for contacting with the contacts D, A, connected to an electric motor, and an elongated end in conjunction with a mercury switch T is coupled to the network lighting room. to the author's testimony of A.S., - jSb 25044: Miroshnichenko

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