Electrically driven toothbrush
作者： Frank Mitchell Hunter
DOI:
关键词:
摘要: An electrically driven toothbrush comprising a casing (2) for use as handle which supports an electric motor (10) reversing means (4) and speed reducing (26, 18); stem (46) extending from the with brushhead at one end of stem, rotary motion being in continuous until reversed by manual operation (4). Another version has no oscillating (74) slotted roller (70) eccentric pin on shaft (78) within (46).
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