| 摘要 |
A knob adjustment device particularly for adjusting the temperature in valve units for water-heating apparatus is described and comprises geared movement - transmission means interposed between the knob (2) and an operating member ( 4) of the valve unit in order to transmit a rotary movement to the member about its own axis as a result of a rotation of the knob. The geared transmission means comprise reduction means (5,6,7,8) with a variable transmission ratio such that, for a first angular portion (C) and a second angular portion (D) of the rotation of the knob, the member is rotated with respective different transmission ratios (T1,T2). |
