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Ze HUNTSBERY CLAM-SHELL BUCKET. In its issue of June 18 the MARINE RE- view published a brief description with two photographs of the new wide open- LENGTH OF GRAB CLOSED, 8 FT. 5 _IN.; HEIGHT, 10 FT. 414 IN., FROM. CUTTING EDGE TO CENTER OF MAIN SHAFT. ing clam-shell bucket designed by H. E. Huntsbery, and which is doing eminently satisfactory work on the Cleveland & EXTREME WIDTH 5514 IN. Pittsburg ore docks at Cleveland in con- nection with the Hoover and Mason un- loader. The patent on this bucket was TAE /ARINE REVIEW granted to Mr. Huntsbery on May 19 last, and it is now possible to describe some of its technical features. 'The originality of this bucket consists of providing new and improved means for suspending the respective halves of the bucket whereby its excavating power can be most advantageously applied, all te a>. po T | f O-- eet Nx ~y, : , (« LSS ( NS sisting the scraping devices or hand wor in getting the ore below the hatchway, Also the great stretch of this bucket, j connection with it being a power opera ing bucket, enables the operator by "hee ing" one scoop to operate the bucket the full stretch in either direction therefrom, thereby making the working area of the INSIDE MEASUREMENT 18 Fr. 1% IN, packing of material avoided and the com- plete excavation of the material secured. In general the bucket comprises two scoops or trays adapted to form a sin- gle receptacle or bucket when their front edges are brought into contact. These scoops are suspended from shafts by a combination of arms or links and the power for opening and closing the same is applied through a series of sheaves and ropes. The supporting and operating mechanism is so arranged that no part thereof overhangs or projects beyond the sides or ends of the bucket and conse- quently will not come in contact with any portion of the vessel or boat where the bucket is being used. The general ar- rangement of the parts is such as to se- cure the minimum height of structure when the bucket is closed and the maxi- mum stretch for the length of arms, thus allowing the bucket to be readily oper- SS IE ee bucket equal to twice the actual spread thereof. Therefore if three buckets are being operated, and one of the buckets becomes disabled, the other two buckets can be so manipulated as to practically do all the work of the disabled bucket without either shifting boat or rig. -Fur- thermore the scoops are so mounted and supported that, when the bucket is open, the digging edge of each scoop will be further out than the top or rear edge thereof and therefore in operation the digging edge will come in contact with the bulkhead or wing of the boat while the top edge of the scoop will be a dis- tance back from either the bulkhead, wing or stanchion which permits all vertical -- surfaces as well as the horizontal sur- faces to be scraped by the edges of the bucket. When the bucket is open the cutting edges and the front side edges | of the scoops or trays are in the same _ ™ N AS eee | | | on o i we a etn ea 19 JE INSIDE MEASUREMENT 18 FT. 114 IN, ated in the hold of a vessel between decks or in other comparatively shallow or low places, and the large area cov- ered by the bucket when open permits the same to be used for scraping the ore together, thereby supplementing and as- ue & Pete ; a '7 eae fey plane, and, therefore, when the bucket is lowered into the hold of a boat the entire lower edges of the scoops come in contact with the tank tops and the side edges of -- the scoops, therefore, prevent the cut- ting edges from digging into or in any 2.