Improvements in and relating to Tool-grinding Machines

103,623. Lumsden, T., and Blake, E. G. Sept. 26, 1916. Disk apparatus.-Comprises a copying-arrangement for grinding tools in the form of non-circular disks. The tool a to be ground and the pattern disk b are mounted on a spindle d which can be rotated, by a hand-wheel q, in the sleeve g. The sleeve is formed with a plunger h fitted in a socket on the support j and connected to a weighted or spring-tensioned cord k, whereby the spindle is drawn laterally to press the pattern and tool against the faces of the guide-plate c and grinding- disk f respectively. According to the invention, (1) the guide-plate is made adjustable in a direction at right-angles to the face of the grinding- disk while the machine is in motion, as by forming it with a stem x adjustable in a socket in the support by means of a screw and hand-wheel z , (2) the spindle is made movable axially to traverse the tool across the face of the grinding-disk, and (3) the tool is mounted on a pin d with its axis at an angle to that of the spindle, and means are provided for laterally adjusting the axis of the pin, such as the screws d engaging its head d . For the purpose of axial movement, a screw-threaded sleeve r is mounted on the spindle d abutting upon a shoulder s and engaging an internally threaded extension of the sleeve g; the sleeve r may be turned by a hand-wheel v, or it may be clamped to the spindle, in which case the rotation of the spindle produces the axial movement automatically.