Abstract: A compact self-ballasted fluorescent lamp (10) which is equivalent to a typical light bulb is provided. The self-ballasted fluorescent lamp (11) induces a cover (14), a ballast (16), an arc tube (18), a base (12) and a globe (17) and formed into a shape whose outline dimensions are nearly identical to the standard dimensions of a typical light bulb. The arc tube (18) is comprised of a plurality of U-shaped bent bulbs (31) which have an inner tube diameter ranging from 6 to 9 mm and arranged in parallel with one another. Having a bulb height ranging form 50 to 60 mm and a discharge path from 400 to 500 mm, the lamp power is 16 to 23 W. An envelope (19) comprising the cover (14)and the globe (17) has a height ranging from 110 to 125 mm including the height of the base (12).

Abstract: The fluorescent lamp has a bulb formed by lead-free glass having an ultraviolet ray transmission factor of 40% or less at 300 nm or less, mercury gas and rare gas sealed in the glass bulb, a phosphor layer formed on the inner wall of the glass bulb, and a pair of discharge electrodes for causing discharge in the glass bulb and the lead-free glass contains an ultraviolet ray reduction material for absorbing or reflecting ultraviolet rays generated from the fluorescent lamp and can reduce ultraviolet rays to 40% or less at a wavelength of 300 nm or less.

Abstract: An electric power blower (1) includes a handle (5) mounting therein a disk-shaped speed change dial (9) which is capable of rotation on a shaft (10). The speed change dial (9) is disposed between a speed change switch (6) and a trigger switch (8) and has a cut-out (12) formed therein through which the trigger switch (8) can pass without interference, depending on the rotational position of the dial (9). The speed change dial (9) includes a stopper (13) at an free end which defines the cut-out (12). A first regulating surface (14) and a second regulating surface (15) are provided on the stopper (13), forming an angled corner therebetween. The peripheral surface of the speed change dial (9) is exposed to the outside of the blower (1) through two windows (18) in both sides of the handle (5) adjacent to the trigger switch (8) so as to allow manual rotation. The amount by which the trigger switch (8) is pulled into the handle is determined by the rotational position of the speed change dial (9).

Abstract: A pair of stoppers (47) capable of moving back and forth in an axial direction of a spindle (5) are provided on an outer periphery of a tubular portion (9a) for supporting the spindle (5). As a pair of projections (49) provided on a first change ring (32) are moved in conjunction with the rotation of the first change ring (32) which is capable of changing over the operating mode of a percussion driver drill, the stoppers (47) move back and forth in the axial direction. During a percussion mode and a drill mode, the stoppers (47) abut against a flat washer (50) for fixing an internal gear (13) to restrict the forward movement of the flat washer (50), while, during a clutch mode provided in the first change ring (32) as a third changeover position, the stoppers (47) move away from the flat washer (50). A pair of washers (40, 41) superposed on each other in the axial direction of the spindle (5) are interposed between the first change ring (32) and a second change ring (39).

Abstract: In an aging device used to manufacture a plastic molded product, injecting and aging processes are separated from each other. Namely, a plastic base material is approximately processed in advance in a final shape by injection molding. Thereafter, the plastic base material is inserted into an aging die having plural cavities and attached to a press machine such that the aging die is clamped and opened. Next, the plastic base material is heated and melted until a temperature equal to or higher than a glass transition point so as to generate an internal resin pressure. Next, the plastic base material is gradually cooled to transfer a mirror face thereto. The aging device has a die cooling device having plural heat pipes for cooling the die and has a die heating device having plural heaters for heating the die. The heat pipes and the heaters are arranged in a die plate of the press machine.

Abstract: A low pressure mercury vapor discharge lamp is operated at a power more than 550 W/m.sup.2. The lamp has a first layer comprising first grains coated on the inner surface of the tube thereof and a second layer comprising second grains coated on the first layer. The second grains are more positive in contact electrification than the first grains. The lamp reduces an early decrease in luminous flux.

Abstract: A fluorescent lamp characterized in that the charging tendency of a phosphor used is positioned more negative side than that of metal oxides each having a metal ion electronegativity X.sub.i of 7.0 but more positive side than that of metal oxides each having a metal ion electronegativity X.sub.i of 11.8, that particles of the phosphor are charged positive and smaller than 3.0 .mu.C per gram when they are in contact with soda lime glass beads each having a particle size of 200-500 .mu.m, or that they are charged negative and larger than -0.5 .mu.C per gram when they are in contact with reduced iron powder having a particle size of 44-74 .mu.m.

Abstract: A rotation transmitting mechanism includes a first cylindrical body, a second cylindrical body arranged parallel to the first cylindrical body, a rotary body disposed parallel to the first cylindrical body, and circumscribed with the first and second cylindrical body, a pressing unit for pressing one of the first and second cylindrical bodies against the other of the first and second cylindrical bodies so as to make the first and second cylindrical bodies contact each other, and a moving unit for moving the rotary body toward a point where the first cylindrical body contacts the second cylindrical body so as to inhibit contact of the first cylindrical body with the second cylindrical body, and to contact the rotary body with the first and second cylindrical bodies, and for retreating the rotary body in a direction opposite to the aforementioned point so as to permit contact of the first cylindrical body with the second cylindrical body, which contact is caused by the pressing unit.

Abstract: A fluorescent lamp device includes a main body having a base, and a fluorescent lamp supported by the main body and electrically connected to the base. The lamp has a plurality of U-shaped glass tubes which define a zigzagging discharge channel. Each glass tube is provided with a pair of straight portions, each of which has a flat cross section.