(under subclass 71) Linear hoists comprising a cable supported at two points, the distance between which is subject to variations, a trolley traveling on the cable, and means for changing the elevation of the load.
(1) Note. Devices fulfilling the requirements of the above definition, but comprising some feature whereby the load is transferred from the hoisting means to the carrying means are excluded, in accordance with the general scope of the class. Similar devices comprising means for carrying or receiving the load, additional to the corresponding elements of the traversing hoist, are excluded.
SEE OR SEARCH CLASS
104, Railways,
112, and 180 for track and cable details.
242, Winding, Tensioning, or Guiding,
410+, for cable-tensioning devices adapted to cooperate with winding mechanism of general application. 254, Implements or Apparatus for Applying Pushing or Pulling Force,
274, for apparatus for hauling or hoisting a load, the apparatus including a driven drum which pulls on or travels along a cable and a mechanism linked to the drum, or a rotating element of the drive for generating a control impulse to rotation-retarding means or motor when the torque on drum varies.
318, Electricity: Motive Power Systems,
6+, for tension-maintaining type electric motor control system.
414, Material or Article Handling, for various hoisting mechanisms combined with other article handling means, and particularly
138, for means to load or unload ships at sea.
441, Buoys, Rafts, and Aquatic Devices,
80+, for ship to ship or ship to shore cables for transport of personnel therebetween.
474, Endless Belt Power Transmission Systems or Components, appropriate subclasses for drive systems using a belt and pulley, and particularly
