The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

The hopper has a motor-driven gate through which coal is fed to a pan and the latter is tripped automatically to dis- charge its contents into each passing car. When the pan is full, the gate motor is also stopped automatically, pro- vision being made to prevent the pan from spilling coal when no car is under it.. The four-ton cars are hauled on the trestle' by a continuous cable, each of them being equipped with a swivel cable grip which is arranged with a grip that releases the cable automatically at points desired. The cars have side doors: which . are unlatched automatically by a tripper placed at any point along the track where the coal is to be discharged. The cable travels at the uniform rate of 300 ft. per minute. The first 800 ft. of the trestle on the center line of the dock is a steel struc- Pick-Up BripGE oF ture carrying two tracks of the cable railway system at a height of 35 ft. above the surface of the storage space. For the remaining 1,200 ft. of its length this trestle has timber bents supporting continuous storage pockets under the tracks of the cable railway. The pick-up bridge travels along one side of the trestle with one end overhanging the lat- ter and spans the storage space on that side of the dock. The bridge consists of a pair of trusses spaced 21 ft. apart and carried at each end on a two-leg tower. The towers are mounted at the base on wheels traveling on rails laid 'the length of the storage space, these rails being 262.5 ft. apart on centers. -The lower chords of the trusses are placed so coal can be piled to a height of 32 ft. across the storage space and the bridge has a travel of 1,700 ft. The single track loop of the cable railway that is carried by the bridge is laid on floor beams between the lower chords of the trusses. When the cars approaching from the outer end of the dock are to be shunted over the bridge, the tripper is set to release the cable grip just be- fore the bridge is reached. The cars thus retain sufficient momentum to mount the turn-out and continue a short dis- tance along the bridge. A chain haul-. TAe Marine. REVIEW age driven by a 500 H. P. motor in a cabin on the end of the bridge is pro- vided to move the cars on the bridge. This chain engages the grip on the truck of the car and pulls the latter around the loop until a connection to the trestle track is reached. At this point the haul- age chain releases automatically and the grip is attached to the cable by a man on the trestle. Cars can be supplied automatically at any point in their travel along the bridge by means of a tripper which unlatches their doors. The bridge is equipped with two-ton drag line scoop buckets, one of which is placed on each side of it. Each of these buckets is suspended from a trolley carriage oper- ating on a runway carried on arms can- tilevered beyond the top chord of the adjacent truss. The bucket is hauled back and forth along the runway and July, 1910 the cars do not pass over the bridge, but are halted long enough on one of the hoppers on the end of the latter to receive a load. During the direct trans- fer of coal from vessels to the row of pockets the cars do not pass over the loop on the. pick-up bridge. The row of pockets are placed high enough to discharge by gravity into railway cars on a track at the dock level that paral- lels closely the trestle. The bottoms of the pockets are built on a slope toward discharge openings at the side on which the railroad track is placed. The open-. ings are spaced 12 ft. apart and between them the pockets are divided transverse- ly by tight partition walls. Each of thie 83 pockets has a capacity of 35 tons, making a combined capacity of 7,055 tons. The discharge openings are each controlled by a gate operated by hand THE DuLuTH, MissaseE & NortHEeRN Raitway's Coat Dock. raised and lowered by a double drum hoist in a cabin on the tower. Each of these hoists is geared to an individual 150-H. P. motor and either of the mo- tors can be used to drive a traction gear that traverses the bridge along the dock. A hopper is placed at the end of each bucket runway directly over the track of the cable railway system on the bridge side of the trestle. The buckets discharge the coal into the respective hoppers and it is fed from the hopper to the cars for delivery to the row of elevated pockets. The arrangement of the tower equipment is, therefore, such that coal can be unloaded from the vessels, delivered to storage and' re- claimed later or it can be handled di- rectly to the row of pockets for imme- diate shipment. Obviously the greater percentage of coal goes into storage to meet the demand for coal during the winter. The cars thus follow in continuous operation from the hoisting towers around the loop to the long trestle, thence are diverted. over the pick-up bridge to discharge their loads and re- turn to the trestle to continue to the end of the latter, from which they come back on the second track to the hoisting towers. When coal is being reclaimed, from a walk at the ground level. These gates are set high enough to deliver the coal by gravity through spouts to cars on the standard gauge track laid along the row of pockets. At each discharge gate for a distance of 500 ft. from the shore end of the row provision is made to screen the coal by passing it over a grizzly. The screenings drop on a 24-in. conveyor belt which delivers them at the end to a bucket elevation. The latter discharges them in turn into a hopper with two chutes leading from it, one to the top of the end of the trestle and the other to a conveyor extending across the storage space served by the pick-up bridge. Cars on the cable railway sys- tem can be supplied from the first chute and the screenings thus delivered back to the pockets for shipment. The cross conveyor to which the second chute de- livers is placed on a trestle and is ar- ranged so that the screenings may be discharged from it at any point in the width of the storage space. The trestle carrying this belt is built to permit the pick-up bridge to clear it and reclaim the screenings from these piles to the cars of the cable railway for delivery to the storage pockets the same as other coal.