Electric bell mechanism. Composite image showing how an electric bell works. Behind the bell (bottom) is a solenoid (partially shown in this see-through view),an electromagnet formed by a coil of wire. The solenoid is powered by batteries (top) and triggered by a switch or sensor (not seen). When triggered,the solenoid's magnetism moves a metal arm that strikes the bell,causing a ringing noise. The use of self-closing and opening circuits maintains a rapid succession of bell striking while the bell switch is pressed | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 3248 px × 5424 px |
Model Release : | Non requis |
Restrictions : |
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