Abstract: The invention relates to a telescopic boom for a vehicle crane, comprising a base housing (1), which may be mounted to an upper construction on the vehicle crane in a horizontal joint (2), at the lower end thereof and has further horizontal joint (3), to which a tipping cylinder, for inclination of the telescopic boom, which may be connected to the upper construction, may be connected and several telescopic stages (4-11), running either in each other or in the base housing (1), all of which may be telescoped by means of a telescoping device (12) directly connected thereto and which may be locked relative to each other in the telescoped position. One of the telescoping stages (4-11) is embodied from two part pieces (4a, b) may be locked together by stage (4), and both part pieces (4a, b) are pivoted together by means of a hinge.

Abstract: A nonslip resilient surface on the camera attachment area of a camera panhead, which utilizes readily available o-rings (1) arranged concentrically about the camera attachment screw (1B). The depths of successive ring grooves can be graduated to allow for more protrusion of the outer o-rings to assure positive seating with the camera base (2). The resilient o-rings can be retained in their grooves by their own elasticity.

Abstract: A pair of drums is mounted for rotation about at least substantially parallel axes which are located in a common plane. The drums form with one another an axial gap and bodies or walls are located adjacent to the drums and define with the circumferential walls thereof a first channel section which surrounds the circumference of the drums at least in the region of the gap at one side of the plane, and a second channel section which surrounds the circumference of the drums at least in the region of the gap at the other side of the plane. The channel sections merge with one another in the gap. An arrangement is provided for circulating a treating fluid through the channel sections and into the interior of the respective drums and a feeding arrangement feeds the photographic material into the channel sections so that it sequentially moves through the first and thereupon through the second channel section and becomes treated by contact with the treating fluid.

Abstract: A plurality of strip-shaped material-engaging elements is moved by cranks in a path in which the elements sequentially move towards the material to be transported, engage it, move with it through a predetermined distance, and then release it and recede from the material.