| 摘要 |
1,261,823. Sawing at predetermined positions. J. VIERSTRAETE. 2 May, 1969 [9 May, 1968; 26 June, 1968], No. 22563/69. Heading B5L. [Also in Division B3] Apparatus for machining an elongate workpiece such as an I-beam 19 (see Division B3), in which a gantry 1 and a support 2 are relatively movable, includes a saw device (not shown), on a carriage whose position along the beam is determined by reference means which also determine the position of the gantry relative to the support. The reference means are coordinated with the position of one or more abutments against which the beam is pressed. Alternatively, a reference abutment is included such that cutting will always be effected at a fixed position. For this purpose the gantry includes a measuring device with a floating zero reference which can be zeroized at any point of the support. |
