Canadian foundryman (1921) . ance toroutine jobs. Grab Buckets A grab bucket is an arrangementwhich attaches to the crane and is soarranged that it opens like a clamshelland is lowered on to the sand, where itcloses and in doing so fills itself withsand, in which condition it is swung tothe desired position, where it is opened,allowing the sand to fall out. This is aconvenient and rapid way of digging pits,filling large molds or doing any sandhandling within its range. Lifting and Conveying Grab buckets are made in differenttypes, but all working on much the same principle. Some types have two
Canadian foundryman (1921) . ance toroutine jobs. Grab Buckets A grab bucket is an arrangementwhich attaches to the crane and is soarranged that it opens like a clamshelland is lowered on to the sand, where itcloses and in doing so fills itself withsand, in which condition it is swung tothe desired position, where it is opened,allowing the sand to fall out. This is aconvenient and rapid way of digging pits,filling large molds or doing any sandhandling within its range. Lifting and Conveying Grab buckets are made in differenttypes, but all working on much the same principle. Some types have two hoists,one to do the lifting and the other tooperate the bucket, while other typesare controlled entirely by one hoist. Inthe illustration will be seen a singlehoist type of bucket built by Edgar , of Pittsburgh, Pa., which is saidto be doing the work satisfactorily. The grab bucket, like the cran5, canbe used for myriads of other purposesthan sand handling, such as handlingcoal, cinders, ashes, sawdust or anything. THE BROSIUS SINGLE HOOK GEAR BUCKET. which can be enclosed in it, but as afoundry tool it would soon pay its waywithout the outside work. Take, forinstance, the pit which was required forthe dynamo base, illustrated in the lastissue of Canadian Foundryman. Thispit had to be thirty feet in diameter andsix feet deep. This was dug with agrab bucket hung on the crane. Butsupposing there had been no grabbucket, how could this pit have beendug? Gangs of men would have beenemployed to bring the sand from thecentre and pitch it over the side, whenother men would wheel it out of the the grab bucket, the crane dropsit down on the floor and in lifting it upagain it gxabs about a wagon load ofsand. When high enough to clear allobstructions it is taken to any unusedspot and deposited until again much pit work is done there isno more useful tool than the grab bucket. The same tool is used to fillthe pit when the casting is taken molds w
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfoundri, bookyear1921
