Patent ID: 6902403

Claim:
A Braille pin, assembly comprising: a Braille pin having a first part having a transverse cross-section of any predetermined geometrical configuration; a second part having a transverse cross-section of any predetermined geometrical configuration; said second part having a breadth greater than a breadth of said first part; a first shoulder formed at a juncture of said first part and said second part; a bore that slideably receives said Braille pin; said bore having a first section for slideably receiving said first part of said Braille pin with a first clearance; said bore having a second section for slideably receiving the second part of said Braille pin with a second clearance and a transverse cross-section substantially different from said second part; said first clearance being greater than said second clearance; said second section having sidewalls that define a bearing surface for said second part of said Braille pin; and an overhang formed at a juncture of said first and second sections; whereby said overhang limits travel of said Braille pin when said first shoulder abuts said overhang.