Patent GB-301028-A (GB)
Title: Improvements in and relating to the indicating of the wet bulb temperature of an atmosphere
IPC: G01N25/62
Filed: 1928-11-20
Abstract: 301,028. Cooling & Air Condition Corporation, (Assignees of Fleisher, W. J.). Nov. 23, 1927, [Convention date]. Air, moistening.-A method of indicating the wet bulb temperature of an atmosphere consists in circulating a stream of water in a closed circuit, bringing the atmosphere into contact with the said stream, and providing means for indicating the temperature of the water. The amount of water in circulation is of such small volume as to respond readily to temperature changes. The apparatus comprises a water container 1, Fig. 1, a cylindrical casing 2 with an upturned end 3, and a motor 7 and fan 9 supported in the casing 2. The motor shaft also carries, by means of a spider 14, a cone 10 disposed with its apex 15<a>, which is preferably apertured, well below the water level in the pan 1. The fan draws air downwards through the casing and the cone draws water up its inner and outer surfaces and discharges it in the form of a horizontal sheet from its upper edge 16. The air supply passes through the spray and escapes through the outlet 5. The inlet end of the casing is provided with an apertured cover 6 which supports the motor 7. The water in the pan assumes the true wet bulb temperature and a thermo-responsive element 18 is disposed. below the water level so as to operate a temperatureindicating device 19 or for controlling a ventilation system. Specification 325,515 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) states that the apparatus may be employed in the ventilation and air-treating system shown in Fig. 3 (Cancelled), wherein a room 50 has an air inlet 51 and an outlet 52. The air-conditioning apparatus comprises a fresh air intake 53, fan 54, heater 55, mixing-chamber 56, air-washing apparatus 57, second mixing- chamber 58, and fan 59, the air being then delivered to the air inlet 51. The air outlet 52 is connected to the mixing-chambers 56, 58 by conduits 61, 62, each of which is controlled by a damper 63, 64. The spray nozzles 65 in the washing chamber 57 are supplied with water by a conduit 66 supplied by a pump 67. A conduit 68 supplies fresh or refrigerated water for the spray, and a conduit 69 permits the recirculation of water from the spray chamber. Valve mechanism 70 operates a three-way valve 71. to control the proportions of re-used and refrigerated water passed to the pump for use in the spray nozzles, and a valve 72 controls the admission of steam to the heater 55. The valves 70, 72 are controlled, through the medium of compressed air in conduits 73, 74, by a wet bulb thermostat 75 in the outlet 52 such that, with a rising wet bulb temperature the valve 72 is adapted to cut off the supply of heat to the heater 55, and later the valve 71 is operated to introduce refrigerated water to the sprays. A dry bulb thermostat 81 in the conduit 61 is arranged so that as the temperature rises, steam is first cut off from a heating coil 76 in the conduit 62, and later the damper 64 is also operated to reduce the amount of return air. This subject-matter does not appear in the Specification as accepted.