By Henry G. Abbott
Back in all its unique status Abbott's American Watchmaker and Jeweler is still the final word source for watchmaking and jewellery craftsmanship. No element of the alternate is going exposed during this noticeably American method of those old approaches, equipped to be the precise advent 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 types of escapements, entire instructions for making staffs, ideas for detoxing, pickling, and sharpening every kind of metals, a whole record of valuable phrases, and masses more.For years Abbott revised this unrivaled paintings, consulting the easiest experts to supply the main actual and complete textual content. this is the ultimate reference, immediately from an period of dignified pros and severe craftsmen.
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Conté: quantity 1. basics --
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Volume three. purposes.
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Extra info for Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith
An alloy of 5 parts of aluminium to 95 parts of gold gives an alloy that is nearly as brittle as glass. An alloy of 10 parts of aluminium to 90 parts of gold is white, crystalline and brittle. An imitation of gold, used as a substitute for the precious metal in cheap jewelry, is made by fusing together 5 to 7½ parts of aluminium, 90 to 100 parts of copper and 2½ of gold. The color of this alloy resembles gold so closely as to almost defy detection. Alloys of Gold used by Jewelers. The alloys of gold should not be overheated and ought to be poured immediately after the proper fusion has taken place.
4. ALLOY. A compound of two or more metals. It is usual to melt the less fusible metal first and add the more fusible. Alloys for Compensation Balances. Breguet used for his compensation balances the following alloy: Silver, two parts, by weight; copper, two parts; zinc, one part. First melt the silver and throw in the zinc, reduced to small pieces, stirring the metals and leaving it on the fire for as short a time as possible to prevent the volatilization of the latter metal; then pour it out and let it get cold.
It is used for making blades of desert and fruit knives. Aluminium Gold. One part of aluminium to 99 of gold gives a metal the color of green gold, very hard but not ductile. An alloy of 5 parts of aluminium to 95 parts of gold gives an alloy that is nearly as brittle as glass. An alloy of 10 parts of aluminium to 90 parts of gold is white, crystalline and brittle. An imitation of gold, used as a substitute for the precious metal in cheap jewelry, is made by fusing together 5 to 7½ parts of aluminium, 90 to 100 parts of copper and 2½ of gold.
Abbott's American Watchmaker. An Encyclopedia for the Horologist, Jeweler, Gold and Silversmith by Henry G. Abbott