Preset counter

Abstract

Abstract PURPOSE:To realize a survival type preset counter with a simple constitution. CONSTITUTION:Gear 18a of gear main body 18 in intermediate gear 17 meshes with gear 7a of counting wheel 7, and the intermediate gear is rotated together with the operation of the conting wheel. Counting wheel 7 is set to advance stepwise in the counterclockwise direction, and therefore, intermediate gear 17 is rotated in the clockwise direction. In respect to intermediate gear 17 and setting wheel 14, the tooth of ratchet gear 20 of intermediate gear 17 is placed between two teeth 14b' and 14b'' of star gear 14b of setting wheel 14, and these two teeth 14b' and 14b'' are placed outside the circle of the tooth tip of the ratchet gear, and thus, the rotation of intermediate gear 17 is not transferred to setting wheel 14 even if intermediate gear 17 is rotated. That is, the rotation is not transferred to setting wheel 14 during the counting operation, and the numeric value on the setting wheel survives as it is.

Inventors

• 👤 Masao Yamamoto

Bibliographic Details