By Henry G. Abbott
Back in all its unique status Abbott's American Watchmaker and Jeweler is still the last word source for watchmaking and jewellery craftsmanship. No point of the alternate is going exposed during this exceedingly American method of those historical strategies, equipped to be the precise creation to studying the instruments, elements, and their makes use of, passed down for plenty of generations.Here you will discover enormous quantities of drawings, descriptions, and diagrams of many varieties of escapements, entire instructions for making staffs, recommendations for detoxing, pickling, and sharpening all types of metals, an entire record of invaluable phrases, and lots more and plenty more.For years Abbott revised this unequalled paintings, consulting the simplest specialists to supply the main exact and accomplished textual content. here's the ultimate reference, directly from an period of dignified execs and severe craftsmen.
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Extra info for Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith
In the finer grade of work adjustments are made in the quarters, that is, with 3 up and 9 up. This adjustment is a delicate and often a difficult operation and it is only by constant study and application that the watchmaker can hope for success. Several excellent essays on this subject are in print, among which may be mentioned Modern Horology in Theory and Practice and the Watchmaker's Hand Book by Claudius Saunier, the Watch and Clockmaker's Hand Book by F. J. Britten, and Adjustments to Positions, Isochronism and Compensation, published by G.
The balance is to a pocket time-piece what the pendulum is to a clock; although there are two essential points of difference. The time of vibration of a pendulum is unaffected by its mass, because every increase in that direction carries with it a proportional influence of gravity; but if we add to the mass of the balance we add nothing to the strength of the hairspring, but add to its load and therefore the vibrations become slower. Again, a pendulum of a given length, as long as it is kept at the same distance from the earth's center, will vibrate in the same time because the gravity is always the same; but the irregularity in the force of the hairspring produces a like result in the vibration of the balance.
Let the hairspring be accurately centered, or it must usually be so placed that the lateral pull tends to lift the balance when the watch is hanging vertical. In this and the next succeeding case it would sometimes be advantageous to be able to change the point at which it is fixed, but this is seldom possible. 5. Replace the hair-spring by one that is longer or shorter but of the same strength; this is with a view to increase or diminish the lateral pressure in accordance with the explanation given in the last paragraph.
Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith by Henry G. Abbott