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Headlamp attached to a helmet. A headlamp, headlight, or head torch is a light source affixed to the head typically for outdoor activities at night or in dark conditions such as caving, orienteering, hiking, skiing, backpacking, camping, mountaineering or mountain biking.
The term "blowtorch" is commonly misused as a name for any metalworking torch, but properly describes the pressurized liquid fuel torches that predate the common use of pressurized fuel gas cylinders. Torches are available in a vast range of size and output power. The term "blowtorch" applies to the obsolescent style of smaller liquid fuel torches.
A dyno torch, dynamo torch, or squeeze flashlight is a flashlight or pocket torch which generates energy via a flywheel. The user repeatedly squeezes a handle to spin a flywheel inside the flashlight, attached to a small generator/dynamo, supplying electric current to an incandescent bulb or light-emitting diode. The flashlight must be pumped ...
A flashlight or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb , but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.
A burning torch, discarded on the road in the wake of the Lewes Bonfire Night celebrations. A torch is a stick with combustible material at one end which can be used as a light source or to set something on fire. [1] Torches have been used throughout history, and are still used in processions, symbolic and religious events, and in juggling ...
Thus, the magnitude of weight change from use of breathing gas during a recreational dive usually varies from roughly 1.8 kilograms (4.0 lb) for a 10-litre 200 bar cylinder breathed down to 50 bar, to roughly 3.5 kilograms (7.7 lb) for a steel 15 litre cylinder 230 bars (3,300 psi) breathed down to 50 bar, or about 5 lbs difference for the ...
An unusual application of magnesium torches as an illumination source while wakeskating in 1930. All-weather emergency lighting; Carrying the Olympic Flame from 1930 to at least 1984 [1] Underwater light source (obsolete) from the 1950s to the early 1970s. Photographic illumination (historical), using a somewhat different form of torch. [5]
Under certain conditions, some battery chemistries are at risk of thermal runaway, leading to cell rupture or combustion.As thermal runaway is determined not only by cell chemistry but also cell size, cell design and charge, only the worst-case values are reflected here.
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