Refrigerant Flow Controls – Household
A compact, fully adjustable, late pre WW II, automatic expansion valve by a new generation of manufacturers drawn to the now rapidly expanding market for refrigeration and air conditioning products, factory sealed, with inlet screen, Fedders, Model 33, circa 1938.
Technical Significance:
A factory sealed, non-field serviceable expansion valve would seem to mark a new era in the development of expansion valve technology.
More confident in the engineering performance and reliability of the product, the manufacturer has been able to reduce costs, and produce a more compact, lighter weight valve, without the need for field service access. Bolted flanges and gaskets have disappeared, with the accompanying risks of refrigerant leaks.
The contrast with the construction of valves by Frigidaire a few years earlier is marked. See for example ID # 181, 180.
Industrial Significance:
With the post WW II years would come a profound shift in the structure of the refrigeration and air conditioning industry. A new generation of manufacturers would be drawn to the now rapidly expanding market for refrigeration and air conditioning products. The brand names of Kelvinator and Frigidaire would gradually fade from prominence, as new players, such as Fedders, captured an ever increasing proportion of market share.
It has been noted that the name Fedders was associated with the manufacture of automobile radiators in the pre WW II years, a matter to be confirmed. Experienced in finned radiator engineering and assembly would provide such a manufacturer with a possible entry point into the refrigeration and air conditioning business.
Shortly after WW II, the Fedders name came to be associated with the manufacturer of name brand window air conditioners, in the late 1940, and 50.
A well honoured name, the company still manufactures and markets air treatment and thermal technology products, including air conditioners, de humidifiers air cleaners etc, under a wide range of well known trade marks, including: Emerson, Airtemp, and Trion [Business. Com web site, 050321]