| 摘要 |
1,270,566. 566. Microscope stages. IMAGE ANALYSING COMPUTERS Ltd. Oct. 29, 1970 [Oct. 31, 1969], No. 53406/67. Heading G2J. A microscope stage comprises an inner frame 22 with a mount 30 horizontally movable in a member 32 movable transversely to the movement of the mount 30, an intermediate frame 20 having fine adjustment means to vary the position vertically between the inner frame 22 and intermediate frame 20, and an outer frame 18 having coarse adjustment means to vary the position vertically between the intermediate frame 20 and the outer frame 18 and clamping means to clamp the intermediate frame 20 and outer frames in their adjusted position to enable the fine adjustment to be made. The fine adjustment, Fig. 3, comprises a screw 76 rotatable to pivot levers 82, 84 on knife edges 86, 88, 90 and 92 to adjust the height of the inner frame 22 against the action of upper and lower leaf-springs 26 that connect the inner frame 22 to the intermediate frame 20. The leaf-springs 26 may be other than flat. The coarse adjustment, Fig. 2, comprises a worm 42 acting on a wheel 44 which rotates a shaft (not shown) having a screwed portion which adjusts the height of the intermediate frame 20 in relation to the outer frame 18. Dovetails 38, 40 are provided to guide the two frames. The clamping means provided are in the form of an axially movable shaft 48, on which the worm 42 is freely rotatable and to which it is coupled by a dog clutch 46, axial movement of the shaft disengaging the clutch 46 and pivoting cams 61, 62 which axially move rods 50, 52 to clamp the intermediate frame against the outer frame by means of shoulders 54, 56, and friction washers 68, 70. |
