Rules and Practice for Adjusting Watches

Allowances f

always indicate the same high quality or the expense assum

sitions and that the extreme extent of variation from one position to any other, among any of these watches, did not exceed six seconds. Another model may be stamped in exactly the same way and it may

s just as legitimate in the latter instance as it is in the former, for the watches ar

y six seconds variation and the other allowing twenty-five seconds. Both watches may have the same nu

ove and have an allowance of fifty or more seconds, providing that they were ac

ter allowances, but the dealer and consumer are generally not informed in regard to this particular point. Some watchmakers al

ds of satisfied customers. His reputation after a period of years will be more firmly established than will that of his less particular competitor in the high grade field. A similar situation prevails in the repair shop, and the fact that many of the leading dealers and rail

tion. It is possible that an individual watch in the twenty-five seconds allowance class may have an even better rate than another watch that is in

Requirements for L

adjustment is, and they can be damaged or destroyed entirely by the average workman in making ordinar

ly doing any damage and make practical repairs in a manner that will maintai

reverse, because the training acquired tends to eliminate guess work and enables him to determine more readily as to just

unless one has first had a reasonable degree of training as a watchmaker or repairer, especially in such branches of the work as truing and pois

its various parts, as it does with the problems pertaining to the finished results that are to be obtained through refinement and intelligent assembly of these parts. The workman's willingness to indulge in such study is a very large asset among the requir

tituted parts of watches. Imitation materials may be less expensive as a matter of first cost but staffs may have pivots and shoulders out of line, or out of true; hole jewels may be rough, out of round or extremely thick; mainsprings soft, or of improper proport

nd Escapem

ails that would be essential for those in early apprenticeship. It is thought essential, however, to consider some matters in a general way and among these are the subjects of side shakes and end shakes, and t

n and of making corrections and it is quite necessary to follow some me

e barrel has been reached. If it is not to be taken down, just as good results will be obtained by beginning the examination at the barrel and finishing with the balance. Sometimes watchm

ing whatever to do with the absence of a close position rate and frequently are

mental to have pivots too close fitting and more stoppage and irregular time k

hakes, he can improve his judgment by examining watches of the higher gra

to 0.05 mm. freedom for end shake and 0.015 mm. to 0.02 mm. for side shake. The escape wheel, pallet and balance will be found to run quite uniform at from 0.02 mm. to 0.03 mm. freedom f

end shake and the balance 0.01 mm. and in this instance the short end shake of the balance would be more detrimental in most instances than would the longer end shake of the pallet. The variation will even be found to exceed these figures and when they are found in connection with thick, straight hole jewels they often interfere wit

ed so that the arbor revolves with the main wheel, when the watch is running, may have about the same end shake and side shake as a

in the case of large bearings, such as safety main wheels that revolve around a stationary arbor, or

ld have from 0.03 mm. to 0.05 mm. end shake on

s merely freedom for end shake between the plates, as well

ining the various points and of making corrections and it is not of so much importance

and that there must be positive space for drop between the back of each stone and the pointed end of each escape wheel

it is next necessary to see that the fork

ing as to when the fork length is correct, an

fork until the fork arrives at the pins, at the same instant that the tooth drops on the pallet stone. This eliminates any slide of the stone on the tooth beyond the ac

d, and if it touches on one side only it may require simply equalization of the freedom. The guard pin length als

for, it is necessary to slightly open the bankings so that there will be just

orrect, and these side shakes should not be very much beyond the extreme limits mentioned in this number. The fact of this feature, however, should