Method of manufacture of watch case

Details Method of manufacture of watch case Method of manufacture of watch case

1976-11-29

1978-05-09

DiPalma, Victor A.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

294205, 29DIG25, 29DIG26, 29DIG31, 58 88R, 75203, 106 43, 106 7333, B23P 1300

Patent

active

040878945

ABSTRACT:
A watch case is made from an electrically conductive hard material compoud from aluminum oxide and titanium carbide by forming a blank by sintering the material, subjecting the blank to a heat treatment, spark machining the blank to its final form, and fine grinding and polishing the blank to a desired finish.

REFERENCES:
patent: 3242664 (1966-03-01), Lederrey
patent: 3669695 (1972-06-01), Iler et al.
patent: 3679442 (1972-07-01), Bergna
patent: 3719479 (1973-03-01), Flanagan
patent: 3776706 (1973-12-01), Daniels et al.
patent: 3998671 (1976-12-01), Irion

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