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A Practical Treatise on the Balance Spring: Including Making, Fitting ...
Charles Edgar Fritts
No preview available - 2014
alterations angle arbor attached BALANCE SPRING bend block brass Breguet spring bring British Horological Institute cannon pinion cause center of gravity center-bar chronometer clamps closely cold-box collet color-piece compensation balance concentric arc correct correct-time point cylinder escapement dial diameter direction distance edge effect elbow equal error of rate fastened fitting flat spiral springs gain give hair-spring hardened heat and cold helical spring hole inch injury isochronal action isochronal adjustment isochronal point jewel length lever long vibrations magnetism marine chronometers metal method motion movement moving the regulator nearer normal coil number of vibrations outer coil perfect perfectly piece pivot plate pliers poise portion position practical proper radial line regulator pins screws seconds-hand securing isochronism segments set screw shape shellac short vibrations side soldered steel stud temper terminal curve tion tool trial turn watch loses watchmaker weight workman