Abstract: An improved small electric motor for use as a power source for toys, small electric instruments, and portable electric instruments, and a method for manufacturing rotors for such motor. The small electric motor is provided on a rotary shaft with a commutator provided in parallel and feeder brushes in resilient contact with the commutator. The commutator is fitted to the rotary shaft in a manner providing simplicity of assembly, adjustable positioning of the commutator on the rotary shaft, standardization of a magnet case, and favorable performance in the small motor.

Abstract: In a permanent magnet motor wherein commutator segments have surfaces arranged in a plane perpendicular to the motor shaft for sliding contact with brushes, each brush is made of sheet metal and comprises an inner portion affixed to an end cap of the motor casing, and a substantially annular outer portion united at one of its ends to the inner portion and having an embossed contact on the other end which is resiliently urged into sliding contact with the commutator segment surfaces. The outer brush portion is notched to engage a protuberance on the end cap. A lubricant reservoir is formed either on the commutator or on each brush. The end cap may be locked in position on the motor casing, and the commutator may be mounted on the motor shaft in a predetermined angular position in relation to that of an armature core.