Rensselaer Journal, Volume 10, Number 49, Rensselaer, Jasper County, 16 May 1901 — Liquid Air Fan Motor. [ARTICLE+ILLUSTRATION]

Liquid Air Fan Motor.

The novel motor for driving a ventilating fan shown below has recently been designed by Oscar Patrie Ostergren. The inventor states that the objects of the invention are the utilization of liquid air as a motive fluid for operating a rotary fan and the distri-

bution of the vaporize d liquid about the room for cooling purposes by means of the fan blades. The globe at the top of the apparatus is used as a storage reservoir for the liquid, and may be filled through a

filling plug, or, in cases where a number of fans are used in one building. the supply may be obtained from a central reservoir. To set the fan in motion the valve underneath the reservoir is opened when the liquid will pass down through the pipes, vaporizing by absorbing heat from the atmosphere. The products of the vaporization will rise through the return coil to the top of the reservoir, where the pressure is utilized to force the liquid continuously into the discharge pipe, in addition to driving the fan. This latter result is accomplished by allowing the compressed vapor to pass downward through the central tube to a small turbine just above the fan blades, where its force is expended against the wings. As the vapor is of a very low temperature it is desirable to utilize it after it leaves the turbine for cooling the room, and this is accomplished by extending the outlet pipes into the arms carrying the fan blades, where the air is discharged in advance of the blades, being driven about by the fan and mixed with the warmer air of the room.