| 摘要 |
A flashlight comprises :- <SL> <LI>(i) a barrel for retaining at least one dry cell battery <LI>(ii) a lamp bulb; <LI>(iii) a reflector; <LI>(iv) means for holding the lamp bulb in a pre-determined position in relation to the reflector; <LI>(v) first conductive element(s) for electrically coupling a first electrode of the battery to a first electrode of the lamp bulb; <LI>(vi) second conductive element(s) for electrically coupling a second electrode of the battery to a second electrode of the lamp bulb; <LI>(vii) a switch; </SL> wherein the shape of the reflector follows that of a b-spline curve. Preferably the angle of the reflector surface changes by 5{ over every 10{ of arc as measured from the focal point of the reflector. |
