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Considerable troubles have hitherto attended the work of equipment for planing stone these as granite, and stone of related development. The stone is moved forward on a mattress to which it is keyed the cutters strike its surface obliquely as they are carried spherical on the revolving arms, turning at the identical time on their individual axes, and chipping and breaking off the projecting portions of the stone at each individual cut. All the ploughs of a offered size are produced to the same model, and their parts, going through identical operations, are created all alike. The operate to be shaped is fixed to a sample, which is pressed versus a unfastened roller on the axis of the cutter as the workman passes it together, and it is consequently lower of accurately the very same condition as the pattern. Some of the sharp edges of the wooden are taken off or Spa 114 website chamfered by a cutter revolving between two cones these tutorial and aid the get the job done as it is pressed down edgewise on the cutters, and passed along by the workman. They are fitted on axes, and are at liberty to revolve loosely in their bearings as their edges strike the stone. The machine planed the facial area of a stone slab 4 feet lengthy and 2 ft large, in 7 minutes.
It is ground and shovelled into hoppers which feed the moulds these are eight inches extensive, four inches broad, and four inches deep. The cutters can be applied for planing from three hundred to four hundred sq. toes of freestone surfaces, and about 150 sq. toes of granite, with no currently being ground. It has a pole to which two horses are connected in the common way, and the driver sits on a seat fastened at the rear of the cutters. 38. Stone-planing Machines.-In an institution at Washington, which has but not long ago commenced functions, there have been two planing equipment, and a grinding or sharpening machine. 36. Churn Making, &c.-In an establishment at Worcester, Connecticut, 250 fingers are used principally in building ploughs, hay-cutters, pals, &c. 40. Brickmaking with Dry Clay.-A machine for generating bricks from dry clay was in operation on Staten Island, about 9 miles from New York. The performs are carried on beneath in depth sheds, around to the water side, and are connected with a wharf by a railway, which also extends to the mattress from which the clay is dug.
The cutters are carried spherical by the shaft at the price of about eighty revolutions for every minute when planing freestone, and sixty when planing granite. The stone is keyed on a travelling bed, and passed below a frame, in which will work a sliding carriage pushed by a crank in this carriage is mounted the circular cutter at the necessary angle, and as the stone is carried alongside, the cutter is driven backwards and forwards across its facial area at ideal angles to the route in which it moves, and chips off parallel breadths of stone at each lower. Another modification of this equipment, which is not so economical, is employed when it is important that the face of the stone be left in traces as it came from the resource. The device is related in its development to the popular reaping equipment, but it has only a single wheel, furnished with projections to reduce it from slipping. The churns consist of a double case, the internal just one staying of zinc, which gets the milk or cream, and in which the arms revolve, the outer a person staying of wooden.