Method and apparatus for reading a key

Details Method and apparatus for reading a key Method and apparatus for reading a key

1980-05-19

1981-08-18

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

G01B 1124, G01D 532

Patent

active

042838592

ABSTRACT:
A method and apparatus for reading a key, preferably a key of the type having indentations formed in the flat sides of the key blade. Typical uses for such method and apparatus include incorporating the same in a machine for making a lock to be opened by that key or incorporation in a door lock to identify a given key and by this means a given holder of the key. Movement of reading pins which sense the key indentations are multiplied to cover or uncover groups of juxtaposed light paths to electronically record the depth of the key indentations. Plural indentations on a key can be read either sequentially or simultaneously in parallel.

REFERENCES:
patent: 2177133 (1939-10-01), Desch
patent: 2703456 (1955-03-01), Smyth
patent: 3226811 (1966-01-01), Roland
patent: 3253153 (1966-05-01), Stoddard
patent: 3264742 (1966-08-01), Roland
patent: 3393542 (1968-07-01), Crepinsek
patent: 3775855 (1973-12-01), Marmel
patent: 3840301 (1974-10-01), Pryor
patent: 4090303 (1978-05-01), Uyeda
patent: 4176460 (1979-12-01), Kaye

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