Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1992-03-30
1993-09-21
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Assembling or joining
B23P 1902
Patent
active
052457443
ABSTRACT:
A method and apparatus are disclosed for placing braille letters on an architectural sign face by drilling holes in the sign corresponding to the pattern of braille letters designed to be formed in the sign and then inserting ball bearings or the like in each opening and securing them either by friction or glue in each respective hole to form the braille letters desired. A device is disclosed for drilling the holes by using a template for accurately placing the holes in a desired place on the sign face in an arrangement desired, for accurately duplicating braille letters. Another device is disclosed for pneumatically grasping ball bearings or the like and facilitating forcing these ball bearings or the like into the holes formed in the sign face whereby braille letters are formed in the sign face.
REFERENCES:
patent: 3132962 (1964-05-01), Seymour
patent: 4571190 (1986-02-01), Zagler et al.
patent: 4586904 (1986-05-01), Chlumsky
patent: 4650352 (1987-03-01), Eriksson
patent: 4772205 (1988-09-01), Chlumsky et al.
patent: 5161975 (1992-11-01), Andrews
Letter dated Mar. 5, 1992 from the inventor David A. Edgerton identifying prior art and comparing it with the instant invention (3 pages).
Brochure (1992) of Scott Sign Systems, Inc. entitled Signage Ada Americans With Disabilities Act.
Brochure (1991) of New Hermes Incorporated entitled The Vanguard Series-Computerized Engraving Systems.
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