Abstract: Mechanism for locking and advancing the blade of a cutting instrument.Mechanism distinguished by a rectilinear blade-holding sheath with longitudinal slit having a series of notches on its lower edge, together with a slider to maintain the locking and the advance of the blade, said slider being molded in one piece of synthetic material comprising structures for supporting the blade, a means of elastic return, and a means of locking by a ratchet mechanism in the notches of the shaped blade-carrier.Application: industrial manufacturing of cutting instruments, particularly of the "cutter" type.

Abstract: This tape-type linear measuring instrument comprises a perforated tape adapted to be unwound from or wound on a drum enclosed in a case containing a tape-engaging toothed wheel possibly driven from a motor with the interposition of a speed reducer. Pick-up means responsive to reference marks carried by the wheel or by a member rigid therewith control the operation of an electronic up-and-down counter associated with means for the digital display of the measured length. A shifting pinion may be interposed between the winding drum and the tape-driving toothed wheel to enable the motor to drive the tape both ways. The perforations may be replaced by spaced notches, and a support wheel may be disposed under the tape in co-planar relationship with the driving wheel.