vertical leg 2b of the body 2 via machine screws 5 and thus remains fixed during operation of the cutter a lower cutting blade 7 cooperating with blade 4 is disposed behind blade 4 as the two blades are shown in fig1 blade 7 oscillates about a pivot pin 6 journaled in a bushing 8 mounted in leg 2b of the body 2 as most clearly shown in fig2 thus pin 6 extends through a hole in the fixed blade 4 and through a sleeve 7a which is fixedly secured to the blade 7 the blades 4 and 7 are adjustably resiliently urged toward each other by a coil compression spring 9 which is telescoped over the free end of the pin 6 and acts between the bushing 8 and a nut 10 which is threadedly mounted on the outer end of the pin 6 the movable blade 7 of the cutting device is oscillated in timed relation to the various loom functions including the insertion of the weft by an adjustable tie rod 12 which is reciprocated by means such as a cam or crank driven in timed relationship with the loom the upper end of the tie rod 12 is connected by a clevis and pin means to the outer end of an arm 11 which is mounted upon the sleeve 7a for.