US35842A

US35842A - Improved apparatus for saving silver from waste solutions

Info

Publication number: US35842A
Authority: US
Publication date: 1862-07-08
Anticipated expiration: 1879-07-08

Description

No. 35,842. PATENTED JULY 8, 1 862.

SHAW. APPARATUS FOR S VING SILVER FROM WASTE SOLUTIONS.

UNITED STATES au. err i PATENT OFFICE.

JEHYLEMA snAw, OFBRIDGEPO'RT, oonnno'rrourr.

lMP ROVED APPARATUS For SAVINGSILVER niom wAsirsorunoms.

Specification forming part of Letters Patent huh 35,8 42, dated-July S, 186?.

I To all whom/it may concern/.2

, Be it known that I, J EHYLEMAN SHAW, of the city of Bridgeport, in the county of Fair- .field and State of Connecticut, have invented a new and improved-inodeof preventing the gold and silver contained in solutions used in- 'over which solutions of silver or gold are used,

a vessel to receive the material escaping from the sink, which vessel is provided with such chemicals as will cause the silver or gold contained in the liquids falling into it to beprecipitatedsvhile the surplus water and other worthless material are allowed to escape through awaste-pipe, after first passing through a filter or strainer.

For a more full description of my inven- 4 tion, I would refer to the accompanying drawings. A

- Figure 1 represents my machine andthe interior arrangements thereof, the outside being drawn as though it were made of glass. A represents the .outside case of the machine which may be made of wood or metal, open atthe top, and closed at the bottom. F represents the waste-pipe of the sink, through which the liquids from the sink pass into the machine. E represents, a partition of wood or metal, extending entirely across the case and fitted to the sides thereofwater-tight, and also extending from the top of the case to within about an inch of the bottom. I) is a cloth bag containing two or three pounds of protosulphate of iron. This bag is suspended from the top of the case by the string G, so as to be about midway between the top and bottom of the case. B represents a filter, with a waste-pipe, 0, extending from the inside of the filter to the outside of the case.

Fig. 2 is a vertical sectionbf the filter through the center. The filter is made of a wood or other box open at the bottom, but

A inclosed on all other sides. Near the top of the box the waste-pipe O is inserted. Immediately underneath the waste-pipe a cloth strainer is stretched across the box-and secured thereto. This strainer is represented by the line 1'. Immediately under the strainer i a layer of cotton-batting is placed, which is represented by It. The space marked L is entirely filled up with sawdust. Another layer of cotton-batting is placed next the sawdust, asrepresented by M, and another cloth strainer, N, is then stretched across the bottom of the boX' and secured thereto. H is an open space between the upper strainer and the top of the box.-

The machine, as thus described, is ready for use, and is placed under the waste-pipe of the sink or basin, into which solutions containing silver or gold are wasted,.and in such a o sition that the waste fromthe sink shall fal into .that portion of the vessel in which the bag D is suspended. As the liquids con- .taining solutions of gold or silver run into the vessel A, and come into contact with the bag containing protosulphate of iron, a chemical action takes place, and the silver contained in solution is precipitated. As the vessel fills the surplus water and other worthless liquids pass, through the filter and out at the waste-pipe C, the filter preventing small particles of silver from being drawn by the current out of the waste-pipe.

The machine maybe made of any size,from one foot in diameter and upward, and of any desired height according tovthe quantity-of waste from the sink. The vessel can be relieved of the silver which has been precipitated at any time, and the silver refined,when desired. There are many other chemicals which may be used in the bag, instead of the protosulphate of iron. If desired, metals may be used. The filter may also be made'in a variety of ways and shapes, but the one adopt? ed is sufficient to answer the purpose, I11- deed,the machine will answer a very good purpose without any'filter. It will be necessary from time to time to replenish the bag D as the chemicals therein contained will be grad ually dissolved.

- Having thus described my invention, what arranged and constructed that the liquids 2. The use of the filter B or its equivalent, passing from the sink shall run into, through, for the purpose of preventing small particles and out of said vessel, and between the time I of silver from escaping after the liquids have J of entering said vessel, and escaping therebeen brought into contact with the chemicals from shall be brought into contact with such as described. v I chemicals or metals as will cause the whole or T l l H v i any part of the silver contained in solution EH1 LDMAN SHAW I to be precipitated and retained in said vessel, Witnesses: y

while the worthless material is allowed to es- N. HAYES, cape. I JOSIAH HUBBELL.