Rules and Practice for Adjusting Watches

Springing

of the spring to collet and stud. In the original springing and adjusting of high grade watches, these

nsiderable, also medium grades where no attention has been directed to pinning points and in

Point Alterat

il broken off at the outer end and will require less weighting of the balance to correct the mean time. It will also avoid breaking and remaking the over coil and the possible necessity of readjustment to temperature. Letting out the spring

g the over coil in a manner that will cause the e

line shows the original formation of the over coil with the stud on the line

g.

he spring in beat, the stud will be in

to be shifted from "A" to "B" and bring it

pring at the collet or of moving the stud forward on the over co

aid of the following cuts, is the relation of the pinning point at collet to the pinning point at stud, and that

prings Very Incorr

earest correct relation in more instances than any other relation. They are precisely correct for very few models, however, and are very incorrect for

orrect Collet Pinnin

collet is to face the train side of the movement and hold the balance stationary

g.

r of hairspring and collet as shown at "A B" Fig. 9. Then

g.

the spring may be either over or under even coils, depending entirely upon the loca

g. 9, for example, the proper point of attachment is on the righ

e Swiss watches do, the proper point of attachment i

osition Rates Due to Cha

ts of attachment always produce a fast pendant up rate when compared to the opposite, or pendant do

ring would develop downward as shown at "G" Fig. 11, and "H" Fig. 12, the results would

g.

ng adjusters, and when a spring is pinned at either the slow or fast point the pendant right and left positions general

shown in "I" Fig. 13, the pendant up and down rates would compare nearly equal to each o

g.

l line just opposite to that shown in Fig. 13, the pendant left

g.

thin close limits, due to the existence of the natural error. As these positions, together with the pendant up position are the most important of the four vertical pos

ion Error and Why it

g.

inner terminal curve. Results are not positive, however, and any deviation from the required precision makes the curve valueless. It is possible to obtain perfect adjustment between three vertical quarter positions and the two horizontal positions, but all four quarter positions cannot be perfectly adjusted because the natural error will show up in one of them. Manufacturers of fine watches do not of course presume to supp

f Pinning Poin

g.

by the rate of the watch. For instance, if a spring is pinned at the fast point and if a slightly slower pendant

king the latter alteration we assume that the fast point is a trifle below the horizontal line on that particular watch. When altering springs from the extreme fast point to the extreme slow point, it is advisable to remove a trifle less of the inner coil than the extreme calculation. This will cause the point of attachment to be slightly above the

up rate begins to grow faster until the extreme fast point is reached. [A]The designations "right" and "left" in regard to pinning points are used with the explicit understanding that the individual is facing t

pply in Case of Amer

models. In all other high grade watches the location of the balance and sp

balance and spring are located

rers do not construct separate models for hunti

versing the position of the barrel and winding wheels. This places the winding sleeve at figure three on the dial, which is customar

TNO

portan