Brevete Pierre Allain Abseil Device
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Product details
Brevete Pierre Allain Abseil Device , Small round hole at one end and 'E' shape at other, 18.5(l) x 11(w)cms
On one side of shaft inscription reads "PIERRE ALLAIN" On other side "BREVETE SGDG
It is a slender casting of an aluminium alloy, of a convenient size to hold in one hand, or to put in one's pocket, barely half-a-pound in weight. Somewhat unusual in appearance, it might almost be said to be a thing of beauty.
It looks something like the head of a trident blunted with much use with one spike longer than the others and bent over into a hook. In use the short handle is clipped to a waist loop or shoulder harness, using an eye in the end of the handle. It should preferably be used with an alloy karabiner. The abseil rope is wound twice round the slanting head of the trident, the three prongs of the trident serving to keep the turns separate. All the climber's weight is taken on the handle of the descendeur, and thus the trident acts as a friction bar. The hooked prong ensures that the rope going up to the belay cannot come off the friction bar. Indeed, once the climber's weight is on the handle, the rope must run round correctly.
It uses the same principle then, as the method often adopted on the Continent, of winding two turns of the doubled rope round the straight side of a karabiner, fixed to a waist loop."
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