| 摘要 |
1509101 Linkwork SLM (MODEL) ENGS Ltd 20 Dec 1976 [8 April 1976] 14227/76 Heading F2K Simultaneous or selective operation of two potentiometers 12, 14 is effected by a single control lever 10 universally mounted in a housing by interfitting "E"-shaped frames 26, 32 pivotally mounted on intersecting right-angled axes via stub pivot shafts 24 and 30 respectively journalled in the side walls 18, 40 and 28, 50 of the housing, the shafts 24 and 30 being respectively attached to the potentiometers 12, 14. The control lever is jointly connected to the frames 26, 32 by "U"-shaped coupling members pivotally mounted at the centre of the respective "E"-shaped frames 26, 32. The arrangement is such that angular movement solely about either the pivot shaft 24 or 30 solely i.e. selectively actuates potentiometers 12 or 14 whilst angular movement intermediate the planes of the pivot axes of the shafts 24, 30 simultaneously actuates the two potentiometers 12, 14 by the same or different amounts. The control lever 10 is biased towards a central vertical position by springs 76, 86 which act via pivoted levers 74, 84 on pairs of projecting studs 70, 72 and 80, 82 on the ends of the "E"-frames 32, 26 to normally hold these frames in a jointly horizontal plane. A fine toothed ratchet detent 108-112 adjacent the pivot shafts 24, 30 prevents undesirable movements through vibration &c. Each potentiometer 12, 14 is provided with a manually adjustable toothed adjusters 104, 106 to readily enable separate trim adjustment i.e. the resistance value of each potentiometer 12, 14 to be adjusted mechanically. |
