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ID number: BIRRC-P0027 Institution: Research and Cultural Collections Named collection: Historic Physics Collection Artist / Maker: Alfred Apps Title / Object name: Induction Coils Object type: Physics instrument Place made: 433 Strand, London Materials: Various metals and insulators on polished wooden base Measurements: Base 44 x 24 cm, overall height 21 cm, Box 48 x 27 x 26 cm |
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Induction coils are used to generate electric sparks in air, and this instrument claims to produce sparks up to 6 inches long. The inner coil is connected to a battery via a contact breaker. When a current flows it pulls on the iron rod attached to the contact and this breaks the current; the action is that of a buzzer. The varying current in this coil induces large voltages in the outer coils and these voltages produce the spark. Inscriptions / Translations: 1283 APPS 433 STRAND, LONDON |
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