The middle portion of at least one of the arc-shaped supports is pivoted on the jib arm.

A pair of cutting members is disposed respectively symmetrically within the inner edge of the jib arms.

On such machines digital cameras are mounted on jib arms and a computer system is attached.

One or more articulated boom arms are supported by the stationary base and extend out over the operating table.

At one terminal of the frame there is provided a gap, so as to make both sides of the frame respectively forming jib arms, which have one free end.

Articulated appendage arms, extending from the boom arms, are configured to support the audio, video and other medical equipment used in the operating room in the vicinity of the operating table.

The apparatus consists of a bracket (1) which can be mounted on a supporting arm (2).

The middle portion of at least one of the arc-shaped supports is pivoted on the jib arm.

The steering mechanism comprises a stem, a horizontal connection crossbar, a steering bent arm, a stem main rod, and a horizontal movable connection rod.

A retaining device (18) acts between the arm (2) and the mounting bracket (14) to retain the arm in the set pivotal position.

A pair of cutting members is disposed respectively symmetrically within the inner edge of the jib arms.

The jib arm, by contrast, measures only 2.76 metres.

The pole may include first and second arms that extend substantially vertically upwardly from the base, each arm made up of respective lower, central, and upper telescoping tubular portions.

On such machines digital cameras are mounted on jib arms and a computer system is attached.

One or more articulated boom arms are supported by the stationary base and extend out over the operating table.