| 摘要 |
501,862. Copying - milling machines. FICKERT, H. Jan. 11, 1938, No. 874. Convention date, Feb. 22, 1937. [Class 83 (iii)] An engraving or copy-milling machine has the tracer T and cutter C mounted on independent compound slides on a common base 14, the two slide systems being connected for copying in two dimensions (horizontal plane) by a lever system, and a two armed proportioning lever 4, and the tracer and cutter spindles being connected by further lever mechanism to obtain copying movement in the third dimension (vertical movement). The tracer slide-rest 1, la and the cutter head slide-rest 2, 2a are connected by mechanism comprising similar parallelogram linkages 3, 31 supported on concentric shafts 16 and the proportioning lever 4, the pivot 5 of which may be adjusted to give any ratio of reproduction in a horizontal plane between 1 to 10 and 10 to 1. The third dimensional movement is obtained independently of the other two by means of levers 7 connected to the tracer and cutter spindle at 21 and adjustably pivoted at 8 so that any ratio from 1 : 10 to 10 : 1 may be obtained. The ends 18 of the levers are connected through the linkage shown in Fig. 5 to obtain proportioned vertical movements of the tool and tracer. Since there is no rotation of the tracer on its own axis, a profiled tracer 15, Fig. 4, may bo used for cutting dies with side walls of variable depth from a two dimensional templet. |
