Manufacture of watch springs utilizing wire converted into strip

Claim 1

A PROCESS FOR THE PRODUCTION OF FLAT SPRINGS COMPRISING HOMOGENISING A WIRE OF AN ALLOY WHICH IS PRECIPITATION HARDENABLE, SPECIFICALLY AN ALLOY TAKEN FROM THE GROUP CONSISTING OF STEEL ALLOYS WHICH ARE PRECIPATION HARDENABLE, IRON-NICKEL-CHROMIUM PRECIPITATION HARDENABLE ALLOYS, IRON-NICKEL-CHROMIUM-COBALT PRECIPITATION HARDENBABLE ALLOYS, AND NICKEL-CHROMIUM-COBALT PRECIPTATION HARDENABLE ALLOYS AT A HIGH TEMPERATURE AND QUENCHING THE SAID WIRE TO AN UNHARDENED CONDITION, DRAWING THE QUENCHED WIRE TO REDUCE ITS CROSS SECTION AND, AFTER DECREASING THE CROSS-SECTION, ROLLING THE WIRE TO PRODUCE A FLAT STRIP, THE TOTAL DECREASE IN CROSS-SECTIONAL AREA BY SAID ROLLING AND DRAWING EXCEEDING 80% AND THE DECREASE IN CROSS SECTION BY DRAWING BEING A MAJOR PART OF THE 80% DECREASE, THE DRAWING AND ROLLING BEING FOR ORIENTING THE DIRECTION OF THE MAXIMUM VALUE OF THE MODULUS OF ELASTICLTY ESSENTIALLY IN A DIRECTION PARALLEL TO THE DIRECTION OF ROLLING, AND PRECIPITATION HARDENING THE STRIP AT A TEMPERATURE OF FROM 200* TO 600*C. TO GIVE IT A MODULUD OF ELASTICITY OF AT LEAST 21,000 KG./MM.2.