Contaminant-tolerant Braille pins

Details Contaminant-tolerant Braille pins Contaminant-tolerant Braille pins

2006-08-01

2006-08-01

Fernstrom, Kurt (Department: 3711)

Education and demonstration

Communication aids for the handicapped

Tactile reading aid

C434S114000

Reexamination Certificate

active

07083416

ABSTRACT:
A Braille pin has three parts sharing a common longitudinal axis. A first part has a first breadth and includes a rounded tip felt by a user. A second part has a noncircular transverse cross-section and has a breadth greater than the first breadth. A first shoulder is formed by the juncture of the first and second parts. A third part has a third breadth less than the second breadth. A second shoulder is formed at the juncture of the second and third parts. A pinhole has first, second, and third sections that respectively receive the first, second and third parts of the pin. The first shoulder limits upward pin travel by abutting an overhang at the juncture of the first and second pinhole sections. The second shoulder limits downward pin travel by abutting a step at the juncture of the second and third pinhole sections.

REFERENCES:
patent: 3659354 (1972-05-01), Sutherland
patent: 3718991 (1973-03-01), Kafafian
patent: 4633121 (1986-12-01), Ogawa et al.
patent: 5226817 (1993-07-01), Nakajima et al.
patent: 5842867 (1998-12-01), Hong et al.
patent: 6217338 (2001-04-01), Tieman

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