Illinois Watch Co.
Pocket Watch Regulators

These are known regulators used on Illinois 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:	Chalmers
Inventor:	David W. Chalmers
Patent Date:	Dec 19 1882
Patent Number:	269385

Name:	Reed
Inventor:	George P. Reed
Patent Date:	Feb 5 1867
Patent Number:	61867

Name:	Wheeler 1880
Inventor:	Phillip H. Wheeler
Patent Date:	Jun 22 1880
Patent Number:	229215

Name:	Illinois Spring
Inventor:	Unknown

Name:	Illinois Screw
Inventor:	Unknown

Name:	Illinois Whipspring
Inventor:	(Reed Variant)
Patent Date:	Feb 5 1867
Patent Number:	61867