Starter having brush displaceable to and from commutator

A starter comprising:

• a motor frame;
• an armature comprising a shaft and a commutator, said shaft having two shaft ends, said commutator being located at one of said two shaft ends, and said armature being accommodated and rotatably supported in said motor frame at said two shaft ends;
• a plurality of brushes for contact with a sliding-contact surface of said commutator, said plurality of brushes being electrically connected to a power source and collectively comprising a fixedly held brush being fixedly held in contact with said sliding-contact surface and a movable brush movable held in relation to said sliding-contact surface;
• and
• a displacement member for displacing said movable brush from a contact position at which said movable brush is in contact with said sliding-contact surface to a separated position at which said movable brush is separated from said sliding-contact surface by a predetermined distance, said displacement member comprising:
• a slide rail holding said movable brush so that said movable brush is movable throughout a predetermined range of positions along a displacement path intersecting said sliding-contact surface,
• a return spring urging said movable brush by applying a return force to said movable brush along said displacement path away from said sliding-contact surface,
• an external force-receiving member responsive to an external force to urge said movable brush toward being in contact with said sliding-contact surface,
• a brush interlocking member connected to said movable brush, and
• a biasing spring having first and second biasing spring ends, said first biasing spring end being in contact with said external force-receiving member and said second biasing spring end biasing said movable brush toward being in contact with said sliding-contact surface by applying a biasing force through said brush-interlocking member to said movable brush, each of said biasing force and said return force acting along said displacement path, and said biasing force having a magnitude smaller than a magnitude of said return force.

A starter comprising:

• a motor frame;
• an armature comprising a shaft and a commutator, said shaft having two shaft ends, said commutator being located at one of said two shaft ends, and said armature being accommodated and rotatably supported in said motor frame at said two shaft ends;
• a plurality of brushes for contact with a sliding-contact surface of said commutator, at least one of said plurality of brushes being electrically connected to a power source;
• and
• a displacement member for displacing a movable one of said plurality of brushes from a contact position at which said movable one of said plurality of brushes is in contact with said sliding-contact surface to a separated position at which said movable one of said plurality of brushes is separated from said sliding-contact surface by a predetermined distance, said displacement member further comprising:
• an external force-receiving member urging said movable one of said plurality of brushes toward a position in which said movable one of said plurality of brushes is in contact with said sliding-contact surface when said external force-receiving member receives an external force, and wherein said force-receiving member comprises one of a push-button, a push-pull knob, a lever, a stick, a rotary knob, and a dial, and is manually and externally operable, said displacement member comprising a return spring for separating said movable one of said plurality of brushes away from said sliding-contact surface and pressing said movable one of said plurality of brushes to be in contact with said sliding-contact surface when said external force-receiving member is operated manually.

A starter comprising:

• a motor frame;
• an armature comprising a shaft and a commutator, said shaft having two shaft ends, said commutator being located at one of said two shaft ends, and said armature being accommodated and rotably supported in said motor frame at said two shaft ends;
• first and second brushes for contact with a sliding-contact surface of said commutator, one of said first and second brushes being electrically connected to a power source and another of said first and second brushes being electrically connected to ground, said first and second brushes collectively comprising a fixedly held brush fixedly held in contact with said sliding-contact surface and a movable brush movably held in relation to said sliding-contact surface;
• and
• displacement means for displacing said movable brush from a contact position at which said movable brush is in contact with said sliding-contact surface to a separated position at which said movable brush is separated from said sliding-contact surface by a predetermined distance.