Patent ID: 8281910

Claim:
A brake operating device for a bicycle, comprising, in combination: a housing mounted on a handlebar; a brake lever pivotably secured to the housing; a hydraulic fluid cylinder secured to the housing, the hydraulic fluid cylinder comprising a left portion communicating with a hydraulic fluid reservoir, a right portion, and a shoulder having an axial channel communicating with both the right and left portions; a parallel cylindrical member formed on the hydraulic fluid cylinder and comprising a hollow threaded fastener at one end, a rod disposed in the right portion of the hydraulic fluid cylinder and having one end connected to the brake lever; a spring biased magnetic member having one end urged against the shoulder of the hydraulic fluid cylinder; a plunger interconnecting the other end of the magnetic member and the other end of the rod; a spring biased conductor slidably mounted in the cylindrical member and urged by the hollow threaded fastener; and an electric wire having one end connected to the conductor by passing the hollow threaded fastener and the other end formed as a connector adapted to connect to a predetermined device; whereby for decreasing a turn-on time of the predetermined device a loosening of the hollow threaded fastener will push the conductor away from the brake lever to decrease a current generated on the conductor due to a movement of the conductor relative to the magnetic member; and whereby for increasing the turn-on time of the predetermined device a tightening of the hollow threaded fastener will push the conductor toward the brake lever to increase a current generated on the conductor due to a movement of the conductor relative to the magnetic member.