USRE4683E - Improvement in methods of cooling and ventilating rooms - Google Patents

Description

A. S. LYMAN.

Method of Cooling and Ventilating R0oms.

Rei ssued Dec. 26, 1871.

ture with warm air. place under 'the ice a pipe of suflicient size to UNITED STATES PATENT OFFICE.

AZEL S. LYMAN, OF NEW YORK, N. Y.

Specification forming part of Letters Patent No. 14,510, dated March 25, 1856; extended seven yeafs; reissue No. 4,683, dated December 26, 1871.

To all whom it may concern:

Be it known that I, AZEL S. LYMAN, of the city, county, and State of New York, have invented certain new and useful Improvements in Cooling, Drying, and Disinfectin'g Rooms; and I do hereby declare that the following is a full, clear, and exact descriptionof the same, reference beingmade to the annexed drawing makin ga part of this specificationth'at is to say:

7 My improvement in cooling, drying, and disinbe understood by the following comparison:- If

we suspend a cake of ice freely in the air .and near to the ceiling of a closed room, slight currents would soon be produced by the disturbance of the equilibrium consequent upon the cooling of the air in contact with the ice. These currents would be feeble because the cold descending air would spread out over a wide'base, and the temperature soon -become equalized by mix- If, however, we should surround the ice, the air as it cooled would fall down and soon fill the pipe, but still have'a tendency to spread laterally in consequence of its gravity, and therefore it would exert pressure on all sides similar to a non-elastic fluid. If a plug were now pulled out of the bottom of the pipe this air would pour out with a certain force, due to the difference of temperatures outside and .inside and to the height of the column, obeying precisely the same laws which would govern a non-elastic fluid; The construction of a refrigerating-box on this principle enables me to'employ it to various useful and valuable" purposes, such as the preservation of meats and vegetables, ventilating, cooling, drying, and disinfecting apartments in hospitals, sleepingand other rooms.

The reservoir, when adapted for holding ice as the cooling material, is a box open at or near the top and in or at the bottom. iIt maybe divided into two compartments by a grating, as shown in Fig. 1; in such case the latter serving to support the ice, while the space beneath may form a cold-air chamber, E, and allow the free settling of the cold air from all parts of the grate.

.When inclosed in an air-tight compartment, as shown in Fig. 1 at A, and the box D charged with ice, the moisture will be extracted from the air at the same rate that its temperature is reduced, in the following manner: The air in A is at first of the temperature of the surrounding mediums, and its hygrometrical'condition is the same. Ice being now introduced into the box D,

the air in contact will be immediately reduced intemperatur,-condensation takes-place, and moisture'is deposited. The condensed air, being of greater specific gravity, falls into the air-chamber E, flowing thence intoF. As it cannot spread out and commingle with the external and lighter air, it drives that already in the pipe be;

continual circulation is kept up in such a manner that the whole of the air must circulate through the ice-box. Of course all articles, such as meats and vegetables, would be deprived of their moist'-' ure in a like degree with the .air, the latter being: brought to the condition of great purity and dry ness. As the water collects it falls to the bottom of the, cold-air space E, whence it is dis charged to the outside by a suitable pipe, as

shown at. 4v.

In cooling rooms, dairies, & c., I propose, where the locations allow of it, to employ'cold spring or-well water as the cooling element for the production of the .blast, and for this purpose the refrigerator will be modified. in so far as concerns the cooling-box. Such modification is shown in Fig. 2, the box D being a. tank capable of holding water, having an inlet at p and an outlet at r.- A series of tubes (arranged as may be desired, vertically will be best) is set in the box, as

shown at I. These may open into the cold-air boxE in the same manner as for the ice-box. The cold well or spring water may be made to' flowthrough p byaram or otherwise, and filling up D discharge at-r, thus snrroundingand cooling all the tubes I; or the tank-may be otherwise supplied with cold water. As the air within is cooled it descends into E, flowing thence into the apartment to be cooled, and as the cooling goes onthe moisture bondensing from the air will be deposited upon the sides of the tubes, and, trickling down, may be caught in the trap E or by other suitable arrangements and be discharged, and the operation will be otherwise as before described. By this means a dairy or other room may be kept dry and cool at little or no expense for the cooling material. For further disinfecting a charcoal. box or other suitable agent may be employed, as shown at B; or by placing it at y, where at warm and moist air passes over to be cooled and dried.

Instead of a single opening or-flue in or at the bottom of the ice-boxer below'the lowestlevel of .the ice, several may he emnl'oved in combination with one cooling-reservoir; or, where the apartment is of considerable size, more than one reservoir, for the cooling materials and openings or flues, in like manner, may be arranged either to increase the circulation or to reduce the temperature and drying, or both, as may be required.

I claim- As my improvement'in cooling, drying, and disinfectin g room s, the combination of a descending-conduit or cold-air flue with a reservoir for containing cooling materials, substantially in the manner and for the purposes described.

In a cooling or ventilating apparatus, substantially as herein described, L claim the use of tubes in the reservoiror receptacle, of cooling material.

AZEL S. LYMAN. VVitn-essesl- STEPHEN CUTTER,

EDWARD J Damn. (166)

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