Improvements in Cutlery Grinding Machines

2056. Joy, C. L. Jan 26. Surfacing; sharpening.-In amachine for grinding cutlery, the knife &c. is mounted on a holder secured to a plate pivoted on the ordinary reciprocating carriage. The knife &c. is ground from shoulder to point during the motion of the carriage in one direction only, it being then moved away from the grinder by the rotation of the plate about its pivot, and the carriage moved in the reverse direction at an increased speed. Means are provided for maintaining the carriage at rest while the knife &c. is moved into contact with the grinder by the rotation of the pivoted plate. The plate 30, Fig. 1, carrying the knife-holder support 35, is pivoted at 32 to the carriage 1 and is guided in its movements by a bolt 37 and slot 38. The knife 58 is secured to the holder 33 pivoted to the support 35. Normally, the work is held out of contact with the grinder 39 against an adjustable stop 56 on the carriage by a spring 53. After a blank has been inserted, the operation of the machine is commenced by moving the handle 61, Fig. 1, to drag the rod 59 to the right. This swings the lever 21 about its pivot 62 and moves a rod 63 pivoted to it to the right, compressing a spring 65 and allowing a catch 69 to engage a collar on the rod and hold it to keep the spring 65 compressed. The movement of the lever arm 21a causes a sleeve 20 to slide along the carriage operating - shaft 9, Fig. 3. On this shaft are journaled a large gear 8, continunusly driven by a gear 7 on the sbaft 3 ; gears 16,17 which mesh with planet-pinions 13,14 at the ends of a shaft journaled in the gear 8 ; and a disk 18. The sleeve 20 has a flange 22 carrying pins 23 which project through the disk 18 and gear 16, and which, when the sleeve is moved along the shaft 9, engage clutch-pins 24 on the gear 8. This causes the gears to be locked together, and the shaft 9 is driven directly through the gears 7, 8 and the carriage, driven from the shaft 9 by pinion 11 and rack 12, is given a quick motion in the direction of the arrow d, Fig. 1. This motion continues until the corner of the grinder is opposite the shoulder of the knife ; a trip-pin on the arm 70 on the carriage 1 then releases the catch 69 and allows the spring 65 to push the lever 21 over to the left. This withdraws the pins 23 from the clutch pins 24, and at the same time a pin 72 is projected between stop-pins 19 on the periphery of the disk 18, preventing its rotation. The shaft 9 is now driven by the motion of the planet-pini