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- i i 3 : : Dios eh gtr ET ied Ea RE ae Se Ae eM AT 214 THE MARINE REVIEW FIG. 1—PRESS DESIGNED TO PERFORM THREE OPERATIONS—PUNCHING, SHEARING AND TRIMMING held by special gage bolts. The table or beam on which the work is located has an adjustment actuated by means of two geared sectors at each end to facilitate close setting. The drills are lubricated by means of gravity. A small chain just back of the drill spindles travels over disks provided with pockets which fill with lubricant as they rotate in the trough provided for this purpose. As these disks revolve the lubricant is deliv- ered to the central stem of the disks, which is hollow, and from there to a gutter machined in the drill spindle from whence it flows to the drills. Punching, Trimming and Shearing Press The press shown in the accompanying illustrations is a combination tool re- cently developed by the Long & AI- statter Co., Hamilton, O. It performs three functions that are sometimes car- ried out on three different machines, punching, shearing and trimming. The press is of massive construction designed for hard service and is driven through the medium of spur, double- Fe eno feo Oa eee, geared gearing with a ratio of 12 to 1. The main shaft actuates the punch slide by means of two eccentrics, each of which is placed as near the housing as possible to eliminate strain. The clutch is thrown in by means of a foot treadle and the sliding mechanism is balanced by air pressure. It is claimed that this method gives an_ efficient counterbalance. The machine is equipped with indi- vidual punches and dies for punching operations while the cutting-off operation is functioned by a back upper and lower shear. There is a set of side trimming shears on each end of the tool holders. A safety device is provided to eliminate the possibility of spoiling plates through the punch and shear slides operating at the same time. The plates are stripped from the punches through the medium of an au- tomatic stripper having a direct vertical movement to prevent side action of the plate. The back shearing arrangement is used as a separate operation. Thus, when the main slide which controls the punching is in operation or when side trimming is in process the back shear arrangement is in an idle position. April, 1919 In use, when the punching operation is complete and the sides of the plate are trimmed, the punch gags are pulled out of operation and the rear shearing arrangment is brought into use. <A clutch is next engaged with the master gear and the plate sheared to the de- sired length. The machine will punch holes in groups or rows as desired. The num- ber punched at one operation depends on the number and size of the holes and the thickness of the plate. The press is made in different widths be- tween the housings, varying from 30 to 132 inches, while the throats are any depth from 12 to 36 inches. Fig. 1 is a front view of the machine from the operating side, while Fig. 2 is a cross section showing the interior mechanism. Pipe Bending Machine To bend pipe by hand is generally a long process in which the results are not always satisfactory. The finished bends may not be true to contour and, again, the finished product sometimes contains dents and sharp angles which not only impede the flow of fluids or steam when the unit is put to use but also present an unsatisfactory appear- ance. Imperfect bends also often frac- ture when the pipe is put in use. With the object of simplifying pipe bending methods, the U. S. Shape & Pipe Bending Co., San Francisco, re- cently developed. the machine shown in the accompanying illustration. This HOLDER | IE oor } CIE , | BIE HOLDER FIG. 2—CROSS SECTION SHOWING SOME OF THE OPERATING DETAILS