Patent ID: 6389302
Filing Date: 2002-05-14
Classification: B06B,H04M

Abstract:
A method of providing a silent alert for a radiotelephone, the radiotelephone having a flip or cover, a rotational antenna, a clip, and front and back housing members, comprising the steps of:mounting a piezo-ceramic member so that at least one end is fixed to a stationary portion of the radiotelephone; mounting a selected radiotelephone component to the radiotelephone so that it is free to undergo repetitive movement in response to contact with the piezo-ceramic member; deflecting the piezo-ceramic member from a non-electrically driven position to an electrically driven position; contacting the selected component with the deflected piezo-ceramic member; and repeatedly moving said selected component a distance in a first direction and a distance in a second direction substantially opposite the first direction, said translating step corresponding to said deflecting and contacting steps, wherein the selected component has a mass which is sufficiently large with respect to the overall mass of the radiotelephone to generate a user detectable vibration due to translation thereof.