Universal lens blocking fixture

Details Universal lens blocking fixture Universal lens blocking fixture

1974-12-16

1976-04-20

Husar, Francis S.

Metal founding

Means to shape metallic material

Including means to hold or position preformed product part...

51124L, 164112, 249 91, 425808, B22D 1900

Patent

active

039512037

ABSTRACT:
A fixture for blocking lenses of various diametral sizes with cast blocks of corresponding diametral sizes using a single annular support of fixed diameter for all lenses as a reference relative to which pressure used in clamping of the lenses for blocking may be regulated to prevent lens distortion despite variations in their diametral sizes.

REFERENCES:
patent: 3049766 (1962-08-01), Buckminster
patent: 3166027 (1965-01-01), Spenzel
patent: 3195197 (1965-07-01), Prunier
patent: 3221378 (1965-12-01), Faas et al.
patent: 3330331 (1967-07-01), Duckwall et al.
patent: 3354938 (1967-11-01), Carigan et al.
patent: 3563301 (1971-02-01), McCall
patent: 3724803 (1973-04-01), Goldfarb

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