Abstract: A motor field assembly and method for constructing a permanent magnet motor wherein the shell is formed of relatively thick flat sheet stock as two rectangular portions and an elongated connecting portion. The rectangular portions are rolled into semi-cylindrical shapes and the connecting portion is bent at two places so that the two rectangular portions are in opposed parallel relationship to form a unitary cylindrical motor housing shell with a pair of diametrically opposed seams, the connecting portion forming an end wall of the motor housing. Annular permanent magnet segments are provided and mounted to the interior of the shell in spaced equiangular relation with a central portion of each segment of a pair of diametrically opposed segments spanning a respective seam.

Abstract: A router including an arrangement for locking the shaft against rotation and preventing power from being supplied to the motor when the shaft is locked. The shaft is locked by movement of a lock bar which traps a flatted portion of the shaft in an appropriately dimensioned slot. A secondary switch in the power path to the motor is controlled by movement of the lock bar. In addition, an indicator lamp connected to the secondary switch is lit when the shaft is locked and the router is still connected to a source of power.

Abstract: A plunge type router including a mechanism for setting the depth of cut of the router. The mechanism is a compact and self-contained assembly which provides for fine adjustment, locking and quick release, all at a single location on the tool.

Abstract: A portable electric router having a depth of cut adjustment mechanism including an adjustment ring which engages a screw thread on the motor housing and rotationally engages the router base. The adjustment ring is formed as a split ring with radially directed projections adjacent opposite sides of the split. One of the projections is formed with a camming surface and a clamp lever is provided with a camming surface slidably engaging the projection camming surface. The projection with the camming surface is captured between the other projection and the clamp lever so that rotation of the clamp lever in a first direction forces the projections toward each other to clamp the adjustment ring to the motor housing and the base and rotation of the clamp lever in a second direction allows the projections to separate to release the adjustment ring.

Abstract: A portable electric router having a depth of cut adjustment mechanism including an adjustment ring which engages a screw thread on the motor housing and rotationally engages the router base. Rotational engagement of the ring with the base is effected by providing an annular groove on the base and a projection on the ring engaging the groove. The projection is formed with a plurality of pockets each having an opening communicating with the groove. Within each of the pockets is a ball which extends through the opening to contact a wall of the groove and thereby act as a ball bearing.

Abstract: A motor field assembly and method for constructing a permanent magnet motor wherein the shell is formed of relatively thick flat sheet stock as two rectangular portions and an elongated connecting portion. The rectangular portions are rolled into semi-cylindrical shapes and the connecting portion is bent at two places so that the two rectangular portions are in opposed parallel relationship to form a unitary cylindrical motor housing shell with a pair of diametrically opposed seams, the connecting portion forming an end wall of the motor housing. Annular permanent magnet segments are provided and mounted to the interior of the shell in spaced equiangular relation with a central portion of each segment of a pair of diametrically opposed segments spanning a respective seam.

Abstract: A plunge type router including an arrangement for locking the depth of cut adjustment which does not require the operator to release the grip on the router handle. The locking mechanism is activated by an actuator arm mounted for pivoting movement within the handle. Pivoting of the actuator arm causes a stop plug to be pressed against a guide tube displaceably coupling the router base plate to the router motor housing.

Abstract: Support structure for a table saw blade assembly includes a cast aluminum bracket member with a rectangular opening upon which is movably supported the saw blade assembly. The bracket member is formed with a cavity for containing the saw blade and a discharge chute communicating with the cavity. A cover plate encloses the cavity. On the other side of the bracket member there are stiffening ribs for reducing the vibration of the bracket member. The density of the stiffening ribs increases as the distance from the opening decreases.

Abstract: A portable electric router having a depth of cut adjustment mechanism including an adjustment ring which engages a screw thread on the motor housing and rotationally engages the router base. There is further provided an arrangement for preventing relative rotation between the motor housing and the base. The adjustment ring is formed as a split ring with projections adjacent opposite sides of the split, each with a frusto-conical camming surface. A circular clamp knob mounted for threaded rotation on a bolt passing through the projections radially with respect to the router motor housing bears against the camming surfaces so as to squeeze the ring in order to effect a clamping action as the knob is moved inwardly. In order to provide limit stops for preset depths of cut, a pair of stop rings are provided which are angularly rotatable on the router base.