Elgin National Watch Co.
Pocket Watch Regulators

These are known regulators used on Elgin National Watch Co. watch movements. The regulator is used to adjust the balance wheel's rate of oscillation in order to improve accuracy of the watch. Several varieties of watch regulators were used in movement designs, most of which were patented, often called "Patent Regulators." The best regulators offer extreme precision while adjusting the rate of oscillation. A patent regulator was often an indicator of quality.

Name:	Bosley
Inventor:	Joseph Bosley

Name:	Moseley
Inventor:	Charles S. Moseley and George Hunter
Patent Date:	Nov 17 1874
Patent Number:	157021

Name:	Ball
Inventor:	Webster C. Ball
Patent Date:	Aug 18 1896
Patent Number:	565955

Name:	Elgin "Old Style"
Inventor:	Unknown