Wheel mounted alarm mechanism

Claim 1

A portable alarm mechanism associated with a wheel being movable in relation to a bearing supported axle comprising: a. vibratory body including projecting means; b. striker means for contacting said projecting means of said vibratory body, said vibratory body and striker comprising a signal producing unit; and c. a plurality of concentric means including first elongated spacer means and second elongated threaded means for permitting axial turning between said striker means and said vibratory body with the axial rotation of the wheel, said first elongated spacer means comprising a spring spacer having a first end portion and a second end portion, said first end portion of said spring spacer engaging the wheel for movement therewith, an element having a first side and a second side, said first side of said element frictionally engaging said second end portion of said spring spacer for movement therewith, said second elongated threaded means adjustably connected at one end thereof to the axle of the wheel, a bearing interposed said element and the other end of said second elongated threaded means, said vibratory body and said striker means being adjustably fixed to said second elongated threaded means and said second side of said element such that said striker means and said projecting means of said vibratory body contact each other during revolution of the wheel.