Abstracts of English and colonial patent specifications relating to the preservation of food, etc. : compiled from original documents, or their printed copies, lodged in the Patent Office attached to the Registrar-General's Department, Melbourne / by William Henry Archer.

  • Archer, William Henry, 1825-1909.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Abstracts of English and colonial patent specifications relating to the preservation of food, etc. : compiled from original documents, or their printed copies, lodged in the Patent Office attached to the Registrar-General's Department, Melbourne / by William Henry Archer. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    continually running through the double spirals a2 a2, and, having been deprived of its moisture in the desiccators C C, passes through the tem- perature exchanger E, whence it is allowed, by opening certain valves, to flow into and expand within the spiral chambers surrounding the refrigerator, thereby absorbing heat and reducing the temperature. The air so used is re-pressed in a similar manner after having been re-admitted into the hydraulic vessels A A. The specification contains minute descriptions of details, both of apparatus and mode of action, of a contrivance for compressing the air by means of a column of water (Fig. XI.B), of an arrangement for applying the cold produced to the manufacture of ice, and of the use of screw propellers attached to sailing ships for the purpose of giving motion to the machinery described above ; the whole being illustrated by elaborate plans and drawings, from which those given are selected.—[Viet. 1868, August 10. No. 1139.] 4 c. Refrigeration by liquefaction and subsequent evaporation of certain gases and liquids, such as ammoniacal and nitrous oxide gases, ethers, Src. J. Harrison's patent, as producing cold, is applicable to this portion of the meat-preserving process. The principle of this invention is founded on the fact that certain volatile fluids, such as ether, absorb large quantities of heat, if evaporated in vacuo, which heat is afterwards given off when the vapors thus generated are reduced to a liquid state under pressure. In order to apply this principle, the apparatus is constructed as shown in Fig. I.A The parts are thus described by the inventor :— “ A is an evaporating pan of tinned copper “ B, cistern containing water to be frozen. “ C, compressing gasometer working in D, a bath of mercury. “ E, valves opening for the admission of vapor from A. “F, valve opening for the admission of the condensed vapor. “ G, the condenser surrounded by water. “H, vessel for receiving the condensed liquid. “ I, floating valve, which will open when a sufficient depth of liquid “ accumulates in the vessel ; the valve then rising, the liquid will fi rush through the tube J into the evaporating pan, and be delivered on “ the shelf a, and fall through the holes bb, and then over the frets cc “ to the bottom of the pan. “ K is a piston-rod connected with a steam-engine or other motive- “ power. “ L is a three-way cock for shutting off the communication between “ the two parts of the machine. “ The apparatus is set in motion by pouring ether through the orifice “ d, the cock e being shut. The cock L is turned so as to shut off “ communication with the left-hand side of the apparatus and to open “ communication with the air. Heat is then applied to the vessel H, “ and the air is forced out by the vapor of the ether. The cock L is