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1947-48 Theatre Catalog, 6th Edition, Page 419 (405)

1947-48 Theatre Catalog, 6th Edition
1947-48 Theatre Catalog
1947-48 Theatre Catalog, 6th Edition, Page 419
Page 419

1947-48 Theatre Catalog, 6th Edition, Page 419

THE CLEAN AIR SIDE ot the Westinghouse Precipitron reveals a total absence oi any evidence of dirt accumulation. The unit comprises, beside the collector, an ionizing unit and a power rack. The ionizers are supplied by the power rack with 13,000 volts a.c.. creating a strong electrostatic

field. As the air passes through this electrostatic field, every particle of foreign matter, regardless ot size or makeup. received a positive charge. In the collector, the negatively charged plates attract the positively charged particles, precipitate them from the air, leaving it entirely clean.

ing were devised in order to show the relative efficiency of the various cleanv ing methods.

The collector plates are periodically washed down to remove the dirt. (It should be noted that the equipment is protected by automatic current cut-offs when service doors are opened for any purpose.) In some electrostatic precipi THIS CUTAWAY VIEW ot a typical air duct shows a Westinghouse Precipitron as the cleaning component of an air-conditioning system. Air flow is from right to left. Fresh air enters through the screen and louvers at the right and recirculated air enters through the top.


The air then passes

tation units, washing equipment is completely self-contained, while on other models the collector plates are removed for cleaning.

How often the plates have to be cleaned, of course, depends to a large extent on the amount of dirt in the air, but, generally speaking, it is not oftener than once a month.


For commercial and industrial use, the dust-charger and the dust-collector sections are built into unit assemblies which can be ccmbined according to the needs of the building.

Multiple assemblies are connected side by side, or in tiers, to produce the clean air for larger buildings, such as theatres,

through (I) the perforated doors that distribute it evenly to the cells, (2) the electrostatic tield where the rust particles are charged, (3) the Precipitron cells where these charged dust particles are attracted by the oppositely charged plates. Therefore, only clean air leaves the duct system at the left.
1947-48 Theatre Catalog, 6th Edition, Page 419