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Coe aS _ Equipment Used Afloat, Ashore Plate Planer--Machining Irregular Holes--Welding Torch--Welding Pro- cess--Draft Gage--Cargo Winch--Line Throwing Gun--Portable Furnace O MACHINE ship plates in an | accurate and economical manner calls for special tools designed for the purpose. Owing to the size of the material, means must be pro- vided for locating the work quickly while the clamping arrangement must be adequate to take the thrust of the cutting tools. The plate planer shown in the ac- companying illustration was recently developed by the Cleveland Punch & Shear Works, Cleveland. It was de- signed' to expedite rapid production and it embodies several distinctive features. The bed is box section carrying the . ways for the carriage and the surface on which the work is located. Rigid housings -are bolted at each ~ end. Thesé are connected by a cross rail which carries the pneumatic jacks that hold the work in place. The car- Fiage is fitted 'with. a tool holder carrying two tools which have an in and out adjustment. To save time, the tools cut continuously. One is in operation while the carriage traverses to ithe right while the other cuts while the travel is in the opposite direction. The tools are so arranged that the one not in operation does not drag over the work. The tool holder is of the swiveling type, rotat- ing around a king pin. A _ handle located just behind the hand wheel is for the purpose of swiveling the tool holder manually if desired. | The operator rides on a platform with the carriage which reverses auto- matically at the end of each stroke. The operator can reverse the car- riage at any point of its stroke with- out leaving his platform. Thus, if upon starting a cut, it is seen that it is not deep enough, he can imme- diately reverse the cut, feed in deeper and start. again. Uhe'< carriage is traversed by a screw which rests in a trough for its entire length. This screw is fitted with ball thrust bear- ines.at each end, The carriage 1s provided with a safety device so that if for any reason the _ reversing mechanism should fail to function, the carriage by coming in contact with the safety arrangement, breaks the current which brings the carriage to a stop almost instantly. The pneumatic jacks for holding the plate in place are each equipped with an air cock. This arrangement per- mits of shutting off any number of cocks when operating upon narrow plates. All operating jacks may be opened or closed simultaneously from any point of the carriage travel. The planer is driven by an auto- matic reversing, direct-connected 40- volt, 3-phase, 60-cycle motor. The electrical equipment also includes a motor-operated brake which is used as: a safety attachment.' The drum of the brake is keyed to an extension shaft on the main driving motor and the mechanism is so arranged that should the current fail to break, the motor brake will automatically set itself. The electrical equipment also includes a button for starting and stopping, and in cases where there is no objection to trailing wires, the 'drill, button may be mounted on the car- riage. The push button may also be mounted on one of the housings. Machining Irregular Holes The device shown in the accom- panying illustration recently was de- veloped by the Watts Bros. Tool Works, Turtle Creek, Pa., for drilling square and irregular holes, such as triangular and hexagonal. The equip- ment consists of three essential parts, a full floating type chuck, a special cutting tool and a guide plate. It can be used in the milling machine, lathe or upright drill, and, is recommended for work than cannot be readily broached or worked to shape by other hand methods. On marine * work, the device can be used to advantage in machining square holes, working out the ends of steam ports, machining forgirig- dies, etc. The chuck is held in the machine by means of a taper shank. The guide plate that controls the movement of the cutting tool is fast- ened in place over the work. The first step recommended is to drill a round hole in the piece to be worked on. This relieves the cutting tool of undue strain. In working coniparatively soft material, however, it is not necessary to drill this clear- ance hole. It is recommended that the depth of holes machined be limited to three times the diameter of the The device is furnished in four sizes with capacities ranging from % to 1%-inch holes. The guide plates ELECTRICALLY DRIVEN PLATE PLANER EQUIPPED WITH PNEUMATIC JACKS FOR HOLDING THE WORK IN PLACE 604