Wheel speed sensor for an adaptive braking system

[1. A wheel speed sensor comprising:

• a spindle;
• a wheel hub rotatably mounted on said spindle;
• disc brake means connected to said wheel hub and being rotatable therewith;
• pickup means nonrotatably mounted on said spindle;
• and
• a tone wheel connected to said hub and rotatable therewith, said tone wheel having notches on an accessible surface;
• said pickup means being located in close proximity with said notches and movable relative thereto to generate a signal representative of the rotational velocity of said tone wheel;
• said tone wheel being located in an offset portion of said disc brake means, both said tone wheel and said disc brake means being pressed on a
• pilot of said wheel hub and rotatable therewith.] 2. A wheel speed sensor comprising:
• a spindle;
• a wheel hub rotatably mounted on said spindle;
• [disc] brake means connected to said wheel hub and being rotatable therewith;
• pickup means nonrotatably mounted on said spindle;
• and
• a tone wheel connected to said hub and rotatable therewith, said tone wheel [having notches on an accessible surface;] having a portion extending radially with respect to said hub and terminating in an axially extending flange, said flange having axially extending notches;
• said pickup means being located in close proximity with said notches [movable relative thereto] , said notches being movable relative to said pickup means to generate a signal representative of the rotational velocity of said tone wheel, said pickup means being movable radially with respect to said hub toward and away from the notches on the flange and further comprising [projections on] means projecting from said pickup means to locate said pickup means a predetermined distance from said tone wheel and to protect
• said pickup means from damage due to normal vibrations. 3. The wheel speed sensor, as recited in claim 2, wherein said [projections] projecting means are located on opposite sides of said
• pickup means to accurately set said predetermined distance. 4. The wheel sensor, as recited in claim 2, wherein said [projections is] projecting means are an extension substantially surrounding the portion of said pickup means in close proximity with said notches, said extension slidably engaging said tone wheel to protect said pickup means and accurately set said predetermined distance.