Any workman who has a universal face
plate to his lathe can turn out the center of the regulator bar to
receive the disk _C_, and also turn out the center of the regulator
spring _B_. What we have said about the regulator bar applies also to
the regulator spring _B_. This spring is attached to the cock _D_ by
means of two small screws at _n_.
The micrometer screw _F_ is tapped through _B''_ as in the ordinary
Howard regulator, and the screw should be about No. 6 of a Swiss
screw-plate. The wire from which such screw is made should be 1/10" in
diameter. The steel cap _C_ is fitted like the finer forms of Swiss
watches. The hairspring stud _E_ is of steel, shaped as shown, and comes
outlined with the other parts.
TO TEMPER AND POLISH STEEL.
The regulator bar should be hardened by being placed in a folded piece
of sheet iron and heated red hot, and thrown into cold water. The
regulator bar _A A'_ is about 3" long; and for holding it for
hardening, cut a piece of thin sheet iron 21/2" by 31/4" and fold it
through the middle lengthwise, as indicated by the dotted line _g_, Fig.
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