Device and method for measuring coin die rotation error

Details Device and method for measuring coin die rotation error Device and method for measuring coin die rotation error

1978-04-10

1979-01-16

Watkins, Donald

Geometrical instruments

Miscellaneous

Light direction

73163, G07F 302

Patent

active

041342097

ABSTRACT:
A device and a method for measuring the die rotation error of coins, which error occurs during the process of coining money, are disclosed. Die rotation error is one factor which determines the worth of coins to coin collectors, and this invention provides rapid and accurate means for determining such errors.

REFERENCES:
patent: 3349612 (1967-10-01), Sherman
patent: 3690012 (1972-09-01), Barna
patent: 3728795 (1973-04-01), Von Camber
patent: 4058820 (1976-06-01), Hollen

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