Hair length measuring apparatus

Details Hair length measuring apparatus Hair length measuring apparatus

1978-07-17

1980-08-19

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33141R, 33DIG3, 132 9, G01B 702, G01B 312

Patent

active

042176956

ABSTRACT:
A hair length measuring apparatus includes a measuring roller and holding clamp operatively mounted on a handle, said holding clamp holding against said roller the hair being measured, such that as said handle is moved along the length of said hair, said roller is caused to rotate thereby. An optical switch detects the rotation of said roller, a decimal counter counts said rotating, and a display displays the state of said counter, thereby providing a continuously updated indication of the length of hair that has traveled across said roller during a given hair measuring operation.

REFERENCES:
patent: 502943 (1893-08-01), Wren et al.
patent: 1455795 (1923-05-01), Logan
patent: 1589184 (1926-06-01), Levy
patent: 3497959 (1970-03-01), Engelsman
patent: 3780297 (1973-12-01), Geary
patent: 3916174 (1975-12-01), Moule

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