US Patent: 8,859X
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Gold ore extractor
Machine for extracting gold from its ores
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Patentee:
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| Nathaniel Bosworth (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 06, 1835 |
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Joel Havens
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Description: |
| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2000 of the almost 10000 documents were recovered.
Little is known about this patent. Only the patent drawing is available. This patent is in the database for reference only.
"The improvements herein described, for which a patent is asked, consists in the arrangements and connections by which we are enabled to collect the particles as soon as disintegrated from the rock, thereby preventing their becoming armed with stony matter as in the old process, which prevented the gold from coming in contact with the mercury. Also, by preventing the gold from parting with a portion of its substance in forming the streak upon rocks in contact during the operation of stamping, which has heretofore been a source of waste. By the old process the gold was necessarily stamped so fine as to flow over the top of the bocard with the water. By the new process the gold is carried out even with the bottom of the bocard. retaining its size and form as when in the matrix. Also the use of silver or gold plate surface, by which we obtain a new agent, that of mechanical pressure, in addition to chemical affinity. Should it not be convenient to obtain the precious metals for the amalgamating plates, and a substitute be used, such as brass, copper, tin or bismuth, it will be proper to subject the amalgam to the action of a single acid that will dissolve the baser metal and not the gold; for if tin, zinc or bismuth, or some of the other metals be combined with gold by melting, it then becomes extremely difficult to separate them."
"As other metals than gold and silver may be used, I claim not only their employment for the purpose described, but, generally, the amalgamating upon a hard fixed metallic substance of any kind, quickening the same by the smallest quantity of mercury which will answer the intended purpose of arresting the particles of gold in their passage over it, whereby 1 expose any required extent of quick-silvered surface, on which the gold will become firmly attached, or the particles effectually united."
Several drawings accompany the specification, and are referred to in it, affording a complete view of the apparatus.
Journal of the Franklin Institute Vol xvii 1836 pg 39
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