1. A fuse comprising:
a fuse element having a pair of flat plate portions forming terminal portions at both ends of the fuse element and a fusible portion provided between opposed inner edges of the pair of flat plate portions, the flat plate portions being formed to have a uniform thickness; and
an insulating housing formed in a box shape and provided to cover inner edge sides of the pair of flat plate portions and the fusible portion in a state in which outer edge sides of the pair of flat plate portions are protruded outward from slits formed at opposed end walls of the insulating housing,
wherein the pair of flat plate portions protruded outward from the slits at the end walls of the insulating housing are folded into a plurality of layers to form the outer edge sides of the flat plates as the terminal portions each having a greater thickness than each of the flat plate portions, and
wherein protrusions provided on side edges of portions of the pair of flat plate portions placed inside the insulating housing abut against inner surfaces of the end walls of the insulating housing.
2. The fuse according to claim 1, wherein a fuse element insertion port from which the fuse element is inserted is provided at one end of the insulating housing, and
wherein one of the end walls is provided as a lid that closes the fuse element insertion port after inserting the fuse element, and in a state in which the fuse element insertion port is closed after inserting the fuse element, the lid is locked from an outside by one of the terminal portions formed by folding the flat plate portions.
3. A method for producing a fuse, the method comprising steps of:
preparing a fuse element having a pair of first and second flat plate portions forming terminal portions at both ends of the fuse element and a fusible portion provided between opposed inner edges of the first and second flat plate portions, at least the flat plate portions being formed by punching a flat metal plate having a uniform thickness;
preparing an insulating housing having a rectangular cylindrical body and a pair of end walls configured to close openings at end portions of the rectangular cylindrical body, one of the pair of end walls being provided as a fixed wall having a slit through which the first flat plate portion is inserted and fixedly closing one of the openings at the end portions of the rectangular cylindrical body, the other of the pair of end walls being rotatably connected to the rectangular cylindrical body via a hinge and provided as a lid that closes the other of the openings at the end portions of the rectangular cylindrical body after inserting the fuse element, the other of the openings being opened as a fuse element insertion port, and the lid having a slit through which the second flat plate portion is inserted on a side edge opposite to the hinge;
inserting the first flat plate portion of the fuse element into the insulating housing from the fuse element insertion port such that an outer edge side of the first flat plate portion protrudes outward from the insulating housing through the slit of the fixed wall and such that a protrusion provided on a side edge of the first flat plate portion abuts against an inner surface of the fixed wall to position the fuse element relative to the insulating housing, so that inner edge sides of the first and second flat plate portions and the fusible portion of the fuse element are accommodated inside the insulating housing;
rotating the lid after the inserting step to close the fuse element insertion port such that an outer edge side of the second flat plate portion is protruded outward from the insulating housing through the slit of the lid an such that the lid abuts against a protrusion provided on a side edge of the second flat plate portion to position the lid at a closed position;
folding the second flat plate portion protruded outward from the insulating housing into a plurality of layers after the lid has been closed, such that the outer edge side of the second flat plate portion is formed as a second terminal portion having a greater thickness than the flat metal plate and such that the lid is locked from an outside by the second terminal portion; and
folding the first flat plate portion into a plurality of layers after or before the fuse element is inserted into the insulating housing, such that the outer edge side of the flat plate portion is formed as a first terminal portion having a greater thickness than the flat metal plate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An ultraviolet wastewater or water treatment system for disinfecting the wastewater or water by ultraviolet radiation, the system comprising:
a. a series of lamp modules forming a bank, each lamp module containing a plurality of ultraviolet lamps each having a longitudinal axis, each lamp having a protective cladding, made of a material transparent to ultraviolet light, disposed thereon;
b. a common drive assembly including:
i. a common drive;
ii. first and second actuators extending generally parallel to the longitudinal axes of the lamps;
iii. first and second mobile devices operatively connected to the first and second actuators respectively and to the common drive, and wherein the first and second mobile devices are movable back and forth along the first and second actuators respectively in a direction generally parallel to the longitudinal axes of the lamps;
iv. a transverse rod extending between the first and second mobile devices and extending generally perpendicular to the first and second actuators, wherein the transverse rod is operatively connected to the first and second mobile devices and is movable in a direction generally parallel to the longitudinal axes of the lamps;
c. a series of elongated beams for supporting the lamp modules, each beam being disposed over one of the modules and extending generally parallel to the longitudinal axes of the lamps and extending generally perpendicular to the transverse rod;
d. a plurality of carriages, each carriage being movably mounted on one of the beams and configured to be operatively connected to the transverse rod such that as the transverse rod moves, each carriage connected to the rod moves back and forth along one of the beams;
e. a plurality of scrapers, each scraper carried by and extending downwardly from one of the carriages for engaging and cleaning the protective cladding of the plurality of lamps in one of the modules as the carriages move back and forth along the beams; and
f. wherein the common drive is operable to move the first and second mobile devices back and forth along the first and second actuators, and wherein as the first and second mobile devices move relative to the actuators, the transverse rod and at least one of the carriages and its respective scraper moves in the same direction as the mobile devices.
2. The ultraviolet wastewater or water treatment system of claim 1 wherein the common drive is supported independently of the ultraviolet lamp modules.
3. The ultraviolet wastewater or water treatment system of claim 1 including an automatic attachment system for automatically attaching and detaching the common drive to at least one of the carriages.
4. The ultraviolet wastewater or water treatment system of claim 3 wherein the automatic attachment system includes at least two springs associated with each carriage.
5. The ultraviolet wastewater or water treatment system of claim 4 wherein the springs extend upwardly from each carriage in converging directions.
6. The ultraviolet wastewater or water treatment system of claim 5 wherein the transverse rod extends between the springs.
7. The ultraviolet wastewater or water treatment system of claim 3 wherein the automatic attachment system is configured to detach the common drive from the at least one of the carriages if the carriage or its respective scraper encounters a predetermined resistance to movement as the carriage moves along its respective beam.
8. The ultraviolet wastewater or water treatment system of claim 1 wherein the first and second actuators are disposed on opposite sides of the bank of lamps.