Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each of the first vehicles is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams, all of them having the same construction, and by intercoupling the male detents on the beams to female detents on blocks, all having an identical construction. The first support structure may be, but does not have to be, intercoupled with a second support structure formed by intercoupling beams and blocks of the same type as the b3eams and blocks in the first structure. The second structure defines a track on which an additional vehicle (e.g., monorail) addressable in the same manner as the first vehicles is movable in first and second opposite directions.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each vehicle is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams and on blocks. The first support structure may be, but does not have to be, intercoupled with a second support structure. The second structure may define a track on which an additional vehicle (e.g., a monorail) is movable in first and second opposite directions. Each of a plurality of manually operated pads generates signals for addressing any unaddressed vehicle and for providing movements of, and the performance of functions in, the vehicle when addressed. Each pad communicates the pad-generated signals to a connected central station. The central station communicates these signals by wireless to the vehicles.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each vehicle is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on the beams and on blocks. The first support structure may be, but does not have to be, intercoupled with a second support structure. The second structure may define a track on which an additional vehicle (e.g., a monorail) is movable in first and second opposite directions. Each of a plurality of manually operated pads generates signals for addressing any unaddressed vehicle and for providing movements of, and the performance of functions in, the vehicle when addressed. Each pad communicates the pad-generated signals to a connected central station. The central station communicates these signals by wireless to the vehicles.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each vehicle is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams and on blocks. The first support structure may be, but does not have to be, intercoupled with a second support structure. The second structure may define a track on which an additional vehicle (e.g., a monorail) is movable in first and second opposite directions. Each of a plurality of manually operated pads generates signals for addressing any unaddressed vehicle and for providing movements of, and the performance of functions in, the vehicle when addressed. Each pad communicates the pad-generated signals to a connected central station. The central station communicates these signals by wireless to the vehicles.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each vehicle is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams and on blocks. The first support structure may be, but does not have to be, intercoupled with a second support structure. The second structure may define a track on which an additional vehicle (e.g., a monorail) is movable in first and second opposite directions. Each of a plurality of manually operated pads generates signals for addressing any unaddressed vehicle and for providing movements of, and the performance of functions in, the vehicle when addressed . Each pad communicates the pad-generated signals to a connected central station. The central station communicates these signals by wireless to the vehicles.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each of the first vehicles is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams, all of them having the same construction, and by intercoupling the male detents on the beams to female detents on blocks, all having an identical construction. The first support structure may be, but does not have to be, intercoupled with a second support structure formed by intercoupling beams and blocks of the same type as the b3eams and blocks in the first structure. The second structure defines a track on which an additional vehicle (e.g., monorail) addressable in the same manner as the first vehicles is movable in first and second opposite directions.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each of these vehicles is movable in any desired direction on a first structure formed by intercoupling beams of identical construction and blocks of identical construction. The first structure may be intercoupled with a second structure formed from the beams and the blocks. The second structure defines a track on which a monorail addressable in the same manner as the first vehicles is movable in first and second opposite directions. The monorail has rollers for driving it on the track and positioning rollers contiguous to the side surfaces of the track for retaining the monorail on the track during its movement. Each of a plurality of manually operated pads generates signals for addressing any unaddressed vehicle and for operating the vehicle.

Abstract: A slewing unit mounted to the upper end of a tower rotates a combination jib and counterjib which extends in a horizontal direction about a vertical axis. A first electrical drive unit powers the slewing unit to rotate the jib to a selected angular position relative to the tower. A trolley is movable longitudinally along the jib. A second electrical drive unit moves the trolley to a selected longitudinal position along the jib. A third electrical drive unit mounted on the trolley extends and retracts a rigid elongate load lifting boom in a vertical direction. A load handler, such as a hook, clam-shell bucket or load lifting platform, is connected to the lower end of the boom.

Abstract: Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each vehicle is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams, all of an identical construction, and by intercoupling the male detents to female detents on blocks, all of an identical construction. The first support structure may be, but does not have to be, intercoupled with a second support structure formed by intercoupling beams and blocks of the same types as the beams and blocks in the first structure. The second structure defines a track on which an additional vehicle (e.g., a monorail) addressable as discussed above is movable in first and second opposite directions. The additional vehicle has rollers for driving the vehicle on the track and has guides (e.g.

Abstract: A slewing unit mounted to the upper end of a tower rotates a combination jib and counterjib which extends in a horizontal direction about a vertical axis. A first electrical drive unit powers the slewing unit to rotate the jib to a selected angular position relative to the tower. A trolley is movable longitudinally along the jib. A second electrical drive unit moves the trolley to a selected longitudinal position along the jib. A third electrical drive unit mounted on the trolley extends and retracts a rigid elongate load lifting boom in a vertical direction. A load handler, such as a hook, clam-shell bucket or load lifting platform, is connected to the lower end of the boom.

Abstract: A remotely-controllable motorized toy bulldozer vehicle has a highly-maneuverable skid steering system and a motorized blade lift mechanism pivotally secured to the chassis of the vehicle operative to permit the blade to free float at its lower positions but operative in the elevated position of such blade to positively hold it up at a set level. A hitch is provided for hitching to a trailer and hitch driver is responsive to such blade being lifted to higher elevations to automatically unhitch the hitch.