Patent ID: 7999818

Claim:
An instruction display system, comprising: a housing; memory means adapted to be accessible by a user for storing instruction information in a format specified by a user; display means for displaying selected portions of said instruction information; hands-free user-controlled processing means electrically coupled to said memory means and said display means, said hands-free user-controlled processing means comprising a switch that causes said processing means to sequentially step or scroll through said instruction information stored in said memory means each time said hands-free user-controlled processing means is actuated, said processing means adapted to receive user inputs in a hands-free fashion with said user inputs defining said selected portions to be displayed, said switch comprising a sleeve coupled to said housing, a ball bearing slidably positioned within said sleeve, and a piezoelectric element coupled to an end of said sleeve such that when said housing is moved sufficient that said ball bearing and said sleeve experience relative movement therebetween and said ball bearing impacts said piezoelectric element, said impact causes said piezoelectric element to actuate said hands-free user-controlled processing means; and mounting means adapted to be attached to the user for coupling said memory means, said display means and said processing means to the user.