Electric resistance heating devices – Heating devices – Fluid-in-circuit type heater
Patent
1993-10-18
1995-09-26
Jeffery, John A.
Electric resistance heating devices
Heating devices
Fluid-in-circuit type heater
F22B 130, H05B 360, F24H 120
Patent
active
054540593
ABSTRACT:
A simple and inexpensive adaptor is provided for a commonly used household vaporizer to reduce and control its rate of vaporization. A thin insulating sleeve or tube is placed around one or more of the electrodes to lengthen the path of the current so as to reduce its strength, and thus the rate of vaporization, whenever the hardness of the water supply is too high. By selecting the proper length of tube, or a tube with the proper size of perforations, the current strength is easily adapted by the user to the water hardness to produce the desired evaporation rate.
"Also, for clarity's sake, in the disclosure and claims, the term 'to adjust the adapter sleeve' means a one-time or occasional change of its length while the vaporizer is not operating, as clearly distinct from any continual variation during the operation of the device."
"Similarly, the term `elastic`as applied to the sleeve means that its material is an elastomer and therefore easily stretchable and thereafter will tend to resume its former shape, as opposed to an only flexible, but not stretchable material."
REFERENCES:
patent: 1981765 (1934-11-01), Weiss
patent: 2572536 (1951-10-01), Tatem
patent: 2621281 (1952-12-01), Runkle
patent: 3308267 (1967-03-01), Fenstermaker
patent: 3714391 (1973-01-01), Katzman et al.
patent: 3714392 (1973-01-01), Katzman et al.
patent: 3877360 (1975-04-01), Vigerstrom
patent: 4205222 (1980-05-01), Williams
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