| 1. | These phonographs featured a large counterbalanced tone arm with horseshoe magnet pick-up.
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| 2. | It consisted of a revolving horseshoe magnet passing over two wound wire coils.
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| 3. | The surviving machine has an applied field from four horseshoe magnets with axial fields.
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| 4. | The guitar's pickup includes individual string magnets as well as a large horseshoe magnet.
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| 5. | The other block of wood supported a horseshoe magnet made of two toy magnets.
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| 6. | He used horseshoe magnets in a single-coil and later a hum cancelling dual coil configuration.
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| 7. | The two halves of the base plus the rotating magnet form a sort of horseshoe magnet.
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| 8. | The instrument was made of cast pickup that incorporated a pair of horseshoe magnets that arched over the strings.
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| 9. | It consisted of two bobbins of iron wire, opposite which the poles of a horseshoe magnet were caused to rotate.
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| 10. | This box telephone consisted a large " U " shaped, horseshoe magnet with an iron core attached to each pole.
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