The Freezer

This consists of a rectangular iron tank, 1 meter x 1 meter x 1.5 meters, containing a galvanized plate iron cylinder, A, kept in place by iron supports. This cylinder contains 24 horizontal tubes, which are open at the ends and riveted to vertical plates like those of tubular steam boilers. The tank is filled with a mixture of water and chloride of calcium, forming, as well known, an incongealable liquid. Into this liquid are plunged the receptacles containing the water to be converted into ice. The chloride of methyl is introduced through the cock, B, into the body of the cylinder, A, and surrounds and cools the tubes, as well as the incongealable liquid uninterruptedly circulating in the latter, by means of a helix, C, set in motion by a belt from the shop. This liquid is thus greatly lowered in temperature and freezes the water in the receptacles.

VINCENTS ICE MACHINE. FIG. 5.  VERTICAL SECTION OF THE PUMP.

VINCENTS ICE MACHINE. FIG. 5.--VERTICAL SECTION OF THE PUMP.

The Pump

The pump in the larger apparatus has two chambers of unequal diameter, that is to say, it operates after the manner of compound engines.

The machine under consideration, being one that produces a moderate quantity of ice, has but a single chamber, as shown in Figs 4, 5, and 6. It is a suction and force pump, whose piston, E, is solid and formed of two parts, which are set into each other, and the flanges of which hold a series of bronze segments.

VINCENTS ICE MACHINE. FIG. 6.  PLAN OF THE PUMP.

VINCENTS ICE MACHINE. FIG. 6.--PLAN OF THE PUMP.

The chamber, properly so-called, is of iron, cast in one piece, and is surmounted with a rectangular tank, F, in which constantly circulates the cold water designed for cooling the sides of the cylinder; these latter always tending to become heated through the compression of the methyl chloride.

The cylinder heads are hollowed out in the middle, and carry the seats of the suction valves. Each of the latter communicates with a chamber, G G¹, in which debouches the pipe, H, communicating with the cylinder, A, of the freezer (Figs. 1, 2, and 3).

VINCENTS ICE MACHINE. FIG. 7.  THE LIQUEFIER.

VINCENTS ICE MACHINE. FIG. 7.--THE LIQUEFIER.

Above the cylinder there are two delivery valves which give access to the chamber, D, communicating with the worm of the liquefier (Fig. 7) through the pipe, J.

The piston of the pump is set in motion by a pulley, K, and a cranked shaft actuated by a belt from the shafting. The piston head is guided by a slide keyed to the frame.

VINCENTS ICE MACHINE. FIG. 8.  SECTION OF FLANGE OF THE WORM.

VINCENTS ICE MACHINE. FIG. 8.--SECTION OF FLANGE OF THE WORM.