1. A HAND PORTABLE CUTTING DEVICE FOR SHEET MATERIALS AND THE LIKE COMPRISING A FRAME HAVING A FOOT MEMBER AND A SHEARING EDGE ON THE UPPER SURFACE OF THE FOOT, A MOTOR FIXED TO SAID FRAME IN ELEVATED RELATION TO THE FOOT AND HAVING AN ARMATURE SHAFT POSITIONED TRANSVERSELY THEREOF WITH CRANK MEANS AT THE END OF SAID SHAFT OVERLYING SAID SHEARING EDGE IN SPACED RELATION THERETO, A BLADE MEMBER HAVING UPPER END LOWER ENDS WITH A CUTTING EDGE THEREBETWEEN, SAID BLADE EXTENDING UPWARDLY FROM BELOW SAID SHEARING EDGE AND AT ITS LOWER END HAVING A PIVOTAL MOUNTING CONNECTION ON SAID FOOT UNDERNEATH SAID SHEARING EDGE AND AT ITS OPPOSITE UPPER END BEING CONNECTED TO SAID CRANK MEANS FOR THE APPLICATION OF DRIVING MOVEMENT OF THE BLADE AT SAID UPPER END.