Abstract: An improved method for final balancing a brake drum determines the location and length of a first constant depth cut and a second constant depth cut along the squealer band which are necessary to correct the imbalance, and using a cutting machine, makes the first and second constant depth cuts at the predetermined location and for the predetermined length along the squealer band to produce a final balanced brake drum. Preferably, the cutting machine is a milling machine which produces a plunge type entrance/exit cut. It is a further feature of the invention to provide a feather type entrance/exit cut to reduce the stress concentrations, and produce a cosmetically more appealing final balanced brake drum.

Abstract: A machine for engraving using a stylus-guided cutting head is disclosed in the present invention. The cutter's motion along three, mutually perpendicular axes is transmitted by air-supported bearings so that play and frictional losses are greatly reduced. This promotes ease of use and accuracy which is of importance when engraving small areas such as billiard cue stick handles and the like.

Abstract: An improved method for final balancing the brake drum determines the location and length of a constant depth cut along the squealer band which is necessary to correct the imbalance, and using a cutting machine, makes the constant depth cut at the predetermined location and for the predetermined length along the squealer band to produce a final balanced brake drum. Preferably, the cutting machine is a milling machine which produces a plunge type entrance/exit cut. It is a further feature of the invention to provide a feather type entrance/exit cut to reduce the stress concentrations, and produce a cosmetically more appealing final balanced brake drum.

Abstract: A bevel and radius routing machine is disclosed with which edges are shaped and corners are rounded in a single machine cycle and which does not require any templates. The radii to be machined can be infinitely variable between 0 and 100 mm by means of simple work spindle adjustment, and no resetting of machine is required when workpiece dimensions are changed. The workpieces to be machined are made from wood, artificial wood, wood substitutes or the like. With the apparatus according to this invention the workpiece is fed past the cutter by means of rubber coated feed rollers and as soon as the position is reached at which the radius begins is swivelled through 90.degree. and then traversed to the next radius in a straight line.

Abstract: A machine for manufacturing a templet for edge grinding a spectacle lens according to the shape of an opening in a spectacle frame designed to hold the lens, comprises a spectacle frame holder supported on a housing. A copying sensor is mounted on the housing for rotation about the axis of the opening and for rectilinear displacement, the sensor sensing the shape of the opening upon rotation thereof. A blank holder is rotatable synchronously with the sensor and a sliding carriage is mounted on the housing for rectilinear displacement with respect to the blank holder, the sliding carriage carrying a cutting tool for cutting the blank to provide said templet. A plunger is rectilinearly displaceable with the copying sensor and synchronously controls the rectilinear displacement of the sliding carriage and cutting tool, the plunger having an axis extending in the direction of the axis of the spectacle frame opening.

Abstract: A first pattern, which has on its outer periphery a series of intersecting surfaces, is used in a conventional edger unit to control the rough grinding of a corresponding series of intersecting surfaces on the edge of a revolving lens blank. A second pattern is then inserted in the edger to control a first bevel grinding operation during which a bevel grinding wheel is caused intermittently to engage the revolving lens blank to form thereon a first plurality of angularly spaced, beveled surfaces at least one of which registers with one of the intersecting surfaces on the blank. A third pattern is then inserted in the edger to control a second bevel grinding operation during which the bevel grinding wheel forms a second plurality of beveled surfaces on the lens blank in the spaces between the first plurality, and in registry with the remainder of said flat surfaces on the blank.

Abstract: A shaping machine for making profiles on tools includes a mechanism for the mechanical adjustment of a grinding wheel at the same time as a positioning of the tool, to obtain substantially identical and accurate tool pieces using a dummy template. Movement of the grinding wheel and tool workpiece allows for the making of profiles of different shapes and sizes, having both concave and convex parts. The machine can also be used for grinding already moulded profiles to sharpen tools for example.