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English to French translations [PRO] Tech/Engineering - Safety / rigging
English term or phrase:easel-leg tripod
For a rigging tripod used in industrial or wilderness environments.
Once connected, the Gin Pole Head can rotate to change the angle of the Easel-Leg relative to the A-Frame Legs.
The front legs of the ***Easel-Leg Tripod*** will have a tendency to spread apart and backward, while the rear leg will have a tendency to move forward.
The rear leg of an ***Easel-Leg Tripod*** must be appropriately secured to control all tensile, compressive and shear (sliding) forces.
The ***Easel-Leg Tripod*** shown is an Anchor Frame as the rope that supports the load is anchored to the frame via a leg-mounted winch.
...a kind of tripod like an artists's easel, where the legs are not symmetrically articualted in a triangle (as for a photographic tripod), but the two 'front' legs only move out and in, while remaining in the same vertical plane as the main upright, and the 'back' leg only moves forwards and backwards, while reamining in the same vertical plane in the sideways direction. This requires a simpler and often sturdier hinge mechanism, but can lead to unequal forces, and the centre column may or may not be truly vertical.
That is in fact an over simplification! There are of course very many different types of easel, hinged in various different ways! Some have front legs that are not articulated at all, and just a back leg for adjusting the tilt. the key feature really is that the three legs are not all equally mobile in the same directions.
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trépied avec jambe réglable
Explanation: Equalteral Tripod (all legs equal with the head centred). • Easel-Leg Tripod (one leg can be rotated/extended to push the head forward). • Bipod or A-frame (standard or sideways ...