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 exchange is going exposed during this enormously American method of those old approaches, prepared to be the proper advent to studying the instruments, components, and their makes use of, passed down for lots of generations.Here you can find 1000s of drawings, descriptions, and diagrams of many varieties of escapements, whole instructions for making staffs, innovations for detoxing, pickling, and sprucing all types of metals, a whole checklist of important phrases, and lots more and plenty more.For years Abbott revised this unrivaled paintings, consulting the simplest experts to supply the main actual and complete 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
Copper, 2 oz. ; No. ; nickel, 1 oz. ; spelter 10 dwts. Malleable Brass. A malleable brass is obtained by alloying 33 parts of copper and 25 parts zinc; the copper is first thrown into the pot, which is covered slightly and fused. As soon as the copper is smelted, the zinc, to be free from sulphur, is added, and cast into ingots. Aluminium. Aluminium, or aluminum, is an extremely light, ductile and malleable metal, which is rapidly coming into favor for many purposes since the great improvements in its manufacture and the consequent reduction in cost.
From the pallet staff center describe a circle whose radius = seven-tenths of the radius of escape wheel, that is, one-half the distance between the escape wheel and pallet staff centers. Tangents to this circle just touching the tips of the teeth already marked, as shown by dotted lines in the drawing, would then form the faces of the pallets if they were left flat. When a tooth has dropped off the right-hand pallet, which is the position of the escapement in the drawing, the amount of impulse is shown by the intersection of the other pallet in the wheel.
Aqua Regia is a combination of I part nitric acid and 2 parts hydrochloric acid, and its strength greatly depends upon the degrees of strength of the two ingredients that form it, which vary in commerce considerably. It is the strongest solvent of metals, and the only one that dissolves gold and platinum. Boric Acid is employed for decomposing the subsalts deposited in cyanide electro-baths, and for increasing the whiteness of silver alloys. Borax of commerce is usually met with in the form of colorless crystals.
Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith by Henry G. Abbott