Warning device for automobile starter replacement

A warning device for an automobile starter having a shaft on which a commutator is installed with four brushes installed in brush holders, comprising:

• each brush having a wear limit line setting a critical operating condition of the starter;
• conducting sensors installed in the respective brushes, each sensor including a conductor installed so that a leading end thereof is located below the wear limit line at a predetermined length and an insulator case of a cylindrical shape which insulates the conductor;
• and
• first and second warning units connected to the conducting sensors, the first warning unit being connected to the conducting sensors installed in the two brushes connected in parallel to a battery, and the second warning unit being connected to the conducting sensors installed in the other two brushes grounded in parallel.

A warning device for an automobile starter having a shaft on which a commutator is installed with four brushes installed in brush holders, the warning device comprising:

• each brush having a wear limit line setting a limit operating condition of the starter;
• cases installed on the brushes, each case including an elastic body in an upper portion thereof and a movable member pushing the brush by the aid of the elastic body;
• push switches pushed and turned on by heads of the movable members, and installed in the cases so that an initial setting distance from an initial position of the head to a position of the head at a position where each push switch is pushed and turned on by the head is set so as to be smaller than a length from a leading end of the brush to the wear limit line of the brush by a predetermined amount;
• ground wires connected to first ends of the push switches;
• and
• a warning unit connected in parallel to the push switches at one end thereof, the warning unit including a battery in circuit with each push switch, and configured to generate a warning signal when the heads of the movable members push and turn on the push switches as the brushes are worn down.

A warning device for an automobile starter having a shaft on which a commutator is installed with four brushes installed in brush holders, comprising:

• each brush having a wear limit line setting a limit operating condition of the starter;
• first and second leads connected to the brushes so that the two brushes form a pair, wherein the first lead is connected to a battery and the second lead is grounded;
• contact parts installed below the first and second leads;
• and
• a warning unit connected in series between the contact parts.