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 point of the alternate is going exposed during this surprisingly American method of those old procedures, geared up to be definitely the right creation to studying the instruments, elements, and their makes use of, passed down for lots of generations.Here you can find thousands of drawings, descriptions, and diagrams of many types of escapements, whole instructions for making staffs, concepts for detoxing, pickling, and sharpening every kind of metals, an entire record of helpful phrases, and masses more.For years Abbott revised this unequalled paintings, consulting the easiest gurus to supply the main actual and complete textual content. this is 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
It has a fine grain, is malleable, and takes a splendid polish. It does not corrode readily, and is an excellent substitute for gold for many purposes. When tarnished, its brilliancy can be restored by a little acidulated water. If tin be employed instead of zinc, the alloy will be more brilliant. Bell Metal. An alloy of copper and tin, in proportions varying from 66 to 80 per cent, of copper and the balance of tin. Brass. An alloy consisting of about 65 parts of copper to 35 parts of zinc. This proportion is varied according to the uses to which the alloy is to be put.
There is another form of the recoil escapement often used in long-cased clocks, in which the anchor embraces ten teeth of the escape wheel, and the foresides of the teeth are radial. It is shown in Fig. 6. In other respects the construction is substantially the same as the one just described. ANGULAR GEARING. Toothed wheels of irregular outline, used in transmitting variable motion, as shown in Fig. 7. ANGULAR VELOCITY. The angle through which an arm turning on its axis is displaced in a unit of time.
Hydrofluoric Acid will dissolve nearly all the metals except silver, platinum and lead. It is a dangerous acid to handle unless you are thoroughly acquainted with its nature. It is used for etching on copper, enamel and glass. Magnesia Calcine is calcined carbonate of magnesia, and is sold in commerce in the form of a white powder. Nitric Acid, or aqua fortis, may be purchased of various colors and degrees of strength, and it dissolves most of the metals. As it is frequently used in a dilute state, it is well to remember that WATER SHOULD NEVER BE POURED INTO THE ACID, but rather POUR THE ACID IN A SMALL STREAM INTO THE WATER, stirring meantime with a glass rod.