WARNING DEVICE FOR INDICATING WEAR OF FRICTION PADS IN DISK BRAKE
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Abstract
EACH FRICTION PAD OF A BRAKE DISK IS PROVIDED WITH A DETECTING SWITCH DEVICE OPERATING TO OPEN A DETECTION CIRCUIT WHEN THE PAD IS WORN TO AN ALLOWABLE WEAR LIMIT THEREBY TO CAUSE A WARNING LAMP TO BE LIT. THE DETECTING SWITCH DEVICE MAY BE A SWITCH OPERATED BY MOVEMENT OF A BACKING METAL SUPPORTING THE FRICTION PAD, A WIRE CUT BY ABRASION THEREOF BY THE BRAKE DISK, OR CONTRACTS RELEASED BY ABRASION OR CONTACT BY THE BRAKE DISK, A SPRING DEVICE IN EACH CASE PREVENTING THE DETECTION CIRCUIT THUS OPENED FROM BEING CLOSED AGAIN.
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