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The sound-308 consists of a body, in
hosting the electromagnet in the form of a core with about-
modoi. Inside the electromagnet is anchored with a sinker
and textolite washer. The anchor is rigidly attached to its
core to the membrane. In case there is a bridge with an under-
rolling equipment and stationary contacts. To enhance the sound
a composite diffuser (horn), consisting of a body
and covers.
Due to the fact that horn signals consume a current
above is valid for a mechanical push-button switch off-
breakers, signal circuits mounted auxiliary
relay. In this case, when the enabling signals through the contacts
the switch passes a small current consumption of only
to the relay coil and causing oxidation and erosion
contacts.
When you turn on the signal button, the current initially flows
in the winding of the auxiliary relay and the anchor using short-
Tye his contacts in the audio signal; passing the contacts
the current supplied to the winding of the electromagnet and through the "mass" -
mycket chain. Thus the force of the electromagnet anchor change-
dropping upwards, arching the diaphragm and simultaneously text-
litovoi washer under the yoke opens the contacts, interrupting
electric circuit. In this case, the core demagnetizes-
Xia, under the action of elasticity of the diaphragm with the lower anchor-
Xia, occupy its original position, the contacts of the signal circuit-
I confess and the process repeats itself. As a result, the armature
the membrane oscillates with a frequency of 200 and 400 Hz,
which creates the sound. The strength and timbre of a sound governed wine
that which moves the edge of the bridge with contacts, change
the average of the moment of contact opening.