Repairing a Regulator

From The American Horologist magazine, July 1940

Repairing a Regulator

By W. H. SAMELlUS, Director Elgin Watchmakers College

Occasionally we are called on to make a new locking pin for a Swiss regulator, which is easily done if proper steps are taken. We first select a piece of brass wire, its diameter being slightly larger than twice the distance of the two holes in the regulator arm. 

Cut stock down to fit the hole in the regulator, leaving the stud a little longer than the thickness of the regulator for riveting purposes. The next diameter is cut down allowing space between the regulator pin and the lock proper, for the hairspring. See Figures No. I and No.5.

Then file off two sides, leaving the lock elongated, as in Fig. No.2 The lock is now cut off from the main wire, leaving the flange of the required thickness as in fig. No.3.

The lock may then be held in a pin 

vise, cutting away the outside flange, leaving the small lip as shown in Figure No.4, and at the same time cutting the screw slot. The lock may then be attached to the regulator arm by slightly heading the stud sufficient to hold the lock in place, but free enough to be turned by a screwdriver as shown in Figure No.5.