Fluid purification device

DETAILED DESCRIPTION Referring to the drawings in detail there is shown for illustrative purposes only, a fluid purification device constituting a preferred embodiment of the invention.
The device is a module to be used with other similar or identical modules for purifying fluids such as waste water with ultraviolet rays according to purification principles which are well-known and need not be described here.
Referring to FIG.
1, the device in its preferred form, includes an inverted U-shape frame including opposite legs interconnected at the top by a cross piece 20 which includes a ballast 2 connected to a power cord 4 by a strain relief 1.
Ballast 2 controls the voltage and amperage through ultraviolet lamps 14 mounted to and between the frame legs as will be described below.
To initially energize the lamps 14, high voltage on the order of 600 volts at the ballast is required but once the lamps are energized, a lower voltage, for example, 180 volts at the ballast is sufficient and this variation of the voltage is provided by the ballast.
Ballast 2 also functions to limit the amperage through the lamps.
The frame leg on the left as shown in FIG.
1 includes upper and lower hollow tubular sections 3 and 7 joined, such as by butt welding, to each other in axial alignment, with the lower end of section 7 being closed.
The frame leg shown on the right in FIG.
1 is also formed in two joined sections including an upper section 22 which may be integral with cross piece 20 and a lower section 16 formed by two plates 16a and 16b.
The latter are welded together at flat web portions 26 and are formed with registering semi-cylindrical recesses 28 providing cylindrical receptacles 30 extending transversely between the webs for receiving the lamp assemblies as will be described below.
Mounted to and between intermediate portions of the frame legs is an inverted generally U-shaped channel 6 having collars 32 fixed thereto with set screws 34 for securing channel 6 in desired position.
Channel 6 serves to reinforce the frame and also as a barrier to the ultraviolet light