Ryobi Motor Products Corp.

The Singer Company

Timothy J Looper

James R Sistare

Elmer C Klebe, Jr

A motor assembly including a unitary member which functions as a combined armature shaft bearing support and brush tube holder. The member is a molded plastic piece which has two legs extending from a bearing support portion and straddling the commutator and armature shaft of the motor for attachment to the motor field assembly. Ledges are formed in the legs to hold the brush tubes, which have lanced projections cooperating with notches formed in the legs for precisely locating the brush tubes and preventing longitudinal movement thereof. To clamp the brush tubes to the ledges, shoulders are provided adjacent the ledges and tabs straddling the brush tubes and the shoulders are secured by screws which pass through the tabs and into the shoulders. In order to accommodate different size brush tubes, different height shoulders are provided on opposite sides of the ledges. In addition, the legs are open at both ends of the ledges to accommodate different lengths of brush tubes.

Motor assembly with combined armature shaft bearing support and brush

A construction for a circular saw wherein the two parts of the clamshell housing are secured directly to the motor assembly from different respective sides thereof.

Unitized tool construction

The subject safety switch insures that the chuck key has been removed from the chuck prior to operation of the drill press. A slide 'on-off' switch is engaged by a guard that prevents the sliding movement necessary to turn the switch on. The guard of the safety switch is not part of the electrical circuit, but rather is a mechanical addition which prevents operation of the electrical circuit. The socket is formed in the housing adjacent the guard. The chuck key is inserted into the socket to engage the guard and remove it from the path of travel of the switch to permit the switch to be shifted between the on and off position. The socket is keyhole shaped, whereby insertion of the chuck key therein will force the chuck to seat within the lower narrower aperture thereof.

Growing community of inventors

Pickens, SC, United States of America

Timothy J Looper