Patent ID: 6265676
Filing Date: 2001-07-24
Classification: G01S,G06F

Abstract:
A transmitter device for use with a system for digitizing operative strokes of a hand-held drawing implement having a body, a front end having an operative drawing tip, and a rear end opposite the operative drawing tip, the transmitter device comprising;a) a housing comprising a front end and a rear end, the front end of the housing having an aperture, the housing further comprising a removable cover portion for receiving a portion of the body of the drawing implement within the housing, with the operative drawing tip extending through the aperture;b) abnormally-closed switch deployed so as to be opened by immediate onset of relative movement between the drawing implement and the housing resulting from pressure applied to the operative drawing tip; andc) a primary spring deployed to bias the drawing implement in a forward direction to a forward position in which said normally-closed switch is closed;wherein said transmitter device is deployed to initiate transmission of a sequence of pulses in response to opening of the normally-closed switch.