By Henry G. Abbott
Back in all its unique status Abbott's American Watchmaker and Jeweler continues to be the last word source for watchmaking and jewellery craftsmanship. No element of the alternate is going exposed during this extraordinarily American method of those old techniques, equipped to be the proper creation to studying the instruments, elements, and their makes use of, passed down for plenty of generations.Here you will find 1000's of drawings, descriptions, and diagrams of many different types of escapements, whole instructions for making staffs, options for detoxing, pickling, and sprucing every kind of metals, an entire record of invaluable phrases, and masses more.For years Abbott revised this unrivaled paintings, consulting the easiest gurus to supply the main exact and accomplished textual content. here's the ultimate reference, directly from an period of dignified pros and critical craftsmen.
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Extra info for Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith
In merely poising a balance for a cheap movement there is no great difficulty, that is, putting it in equipoise sufficient for the reasonably good performance of the movement; but to well and thoroughly poise for a high grade of movement embraces means and methods not necessary in the first mentioned. In a cheap balance a high degree of accuracy is not expected, and so the manipulations are, in the poising, simple, provided all the parts are in condition to admit of poising. The following will be about all the conditions and means used generally: In the outset the balance should be in poise without its staff, and this is approximated before the staff is in by putting into the staff socket in the arm a piece of true wire, sufficiently tight to allow of the balance being held onto it with friction, so that the balance can be trued in the flat by the fingers or with tweezers and remain while poising on the parallel bars.
Alloys of aluminium and zinc are very hard and take a beautiful polish. An alloy of 97 parts of aluminium and 3 of zinc gives a result that is as white as the pure metal, harder than aluminium and very ductile. Artificial Gold. A metallic alloy, at present very extensively used in France as a substitute for gold is composed of: Pure copper, 100 parts; zinc, or preferably tin, 17 parts; magnesia, 6 parts; sal-ammoniac, 3 to 6 parts; quicklime, 1/8 part; tartar of commerce, 9 parts, are mixed as follows: The copper is first melted, and the magnesia, sal-ammoniac, lime and tartar are then added separately and by degrees, in the form of powder; the whole is now briskly stirred for about one-half hour, so as to mix thoroughly, and then the zinc is added in small grains by throwing it on the surface and stirring until it is entirely fused; the crucible is then covered and fusion is maintained for about 35 minutes.
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. K. , Chicago. Isochronal adjustments are thoroughly reviewed in an excellent little work by Moritz Immisch entitled Prize Essay on the Balance Spring.