Improvements in change-speed mechanisms,申请号GB19670017585-传众专利搜索

Improvements in change-speed mechanisms

申请公布号：GB1137211(A)

申请号：GB19670017585

申请日期：1967.04.17

申请公布日期：1968.12.18

申请人：

KALTENBACH & VOIGT

分类号：A61C1/18;F16H3/34

主分类号：A61C1/18

摘要：1,137,211. Change-speed gear. KALTENBACH & VOIGT. 17 April, 1967 [21 June, 1966], No. 17585/67. Heading F2D. [Also in Division A5] A change-speed gear for a dental handpiece includes three radially movable countershaft gear units 27, 28, 29 of different ratios and selectively engageable with pinion pairs 44, 45 and 47, 48 on the aligned driving and driven shafts 7, 8 by a rotary control ring 50 encircling the units. The ratio units are carried in mounting blocks 33 radially movable against loading springs 49 and the desired ratio is engaged by turning the ring 50 until an internal cam projection 50a engages the appropriate roller 53 to move the associated gear into engagement with the desired pinions on the shafts 7, 8. Suitable indicia are provided on the surface of ring 50 to show the particular ratio engaged and a ball detent 55 engageable with one of three recesses, 56 locks the ring in the selected setting.