摘要:
A detecting apparatus for detecting excessive mechanical stresses on a machine having a one-piece structural element the first part of which moves with respect to a second part to an extent determined by the mechanical stress applied to the machine includes a casing rigidly secured to one of those parts and a plurality of electrical switches mounted in the casing. A first arm means is mounted on the other of the first and second parts of the machine and first cam means is rotatably mounted on the casing in contact with the first arm means for rotation thereby upon movement of the first part with respect to the second part. The cam means are operatively connected to the switch means to selectively actuate the switch means upon stressing of the structural elements of the machine.
摘要:
A device for stabilization of an appliance having a chassis comprising a telescopic beam adapted to be fixed to the chassis, a telescopic arm pivotally connected to the beam and carrying a stabilization support, means for telescoping the arm and beam, and means for adjusting the relative angular position of the arm and beam and permitting first and second extreme angular positions corresponding to orientations of the telescopic movement of the arm which are respectively vertical and at an inclination to the vertical.
摘要:
This invention relates to a locking device for a telescopic jib constituted by at least three sections and by a motive member connected between the first and second sections, and comprising at least one bolt capable of integrating the second and third sections in their relative end positions, wherein this bolt is arranged on the rear end of the third section and may be selectively inserted into at least three catches, said catches being respectively unitary with the rear end of the second section, with an element unitary with the first section and with the front end of the second section, whilst the second catch is arranged near the front end of the first section.