Abstract: A grinder assembly includes a spindle selectively rotatable about a central axis. The grinder assembly also includes a grinding wheel attachable to and detachable from the spindle. The grinding wheel is rotatable about the central axis when attached to the spindle. The grinder assembly further includes an adaptor cooperating with the spindle and the grinding wheel to provide a quick attachment and detachment of the grinding wheel with the spindle. The adaptor includes a plurality of first teeth extending outwardly relative to the spindle and a plurality of second teeth extending outwardly relative to the grinding wheel. The first and second teeth cooperate with each other to selectively attach the grinding wheel to the spindle and prevent independent rotation of the grinding wheel relative to the spindle.

Abstract: In a lasting machine shoes are supported with one end aligned with end lasting instrumentalities arranged to operate at that one end, and with the other end thus offset to the longitudinal center line of the instrumentalities (and thus of the machine). The support for the other end of the shoe includes a sensing arrangement mounted to slide transversely of the shoe. The sliding movement serves to distinguish left and right shoes and also to sense the amount of the offset. In addition the length of the shoe is measured from its initial lengthwise clamping. The various measurements are made electronically, e.g. using linear potentiometers. The signals are supplied to a control device (microprocessor) by which control signals are supplied to motors, e.g. stepping motors, for controlling tools, e.g. adhesive applying nozzles, to guide the latter along the sides of the shoe.