Marking device for electronic presentation board

  • US 5,866,856 A
  • Filed: 02/28/1997
  • Issued: 02/02/1999
  • Est. Priority Date: 02/28/1997
  • Status: Expired due to Term
First Claim
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1. A transmitter device for use with a system for digitizing operative strokes of a handheld drawing implement, the drawing implement having a body and an operative tip, the transmitter device comprising:

  • a housing having a substantially cylindrical opening terminating at a first end in an annular wedge surface with a central bore, said housing receiving a portion of the body of the drawing implement with its operative tip extending from said central bore, said annular wedge surface providing an abutting surface against which the said drawing implement may be tightly secured; and

    a retainer attachable to a second end of said opening to securely retain said drawing implement within said housing and to permit precise positioning of the position of the said drawing implement'"'"'s tip, said retainer having a spring element for biasing said drawing implement towards said annular wedge surface, said spring element holding in place said drawing implement regardless of variation in said drawing implement'"'"'s shape, diameter, or length or in the shape or diameter of said drawing implement'"'"'s collar.

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