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Show SaY AND vy WmcnANics DRILLING MACHINE. How It l Made and How It Is Worked.- It will be, seen from the sketch that the drilling macMne Is a very simple affair, consisting essentially of a round block of wood nbout eight Inches long nnd eight tnclics In dlamctor, with an Iron bnnd ring placed on the lop nnd bottom to prevent splitting. Through Its center and protruding about two Inches below1 Is a, smooth round wooden shaft about one and one-fourth Inch In diameter and threo feet in length. Doth ends' of this shaft are protected from npllttlng by a ring or forrule. Tho crossbar Is a piece of wood about threo lnchos wide, one Inch thick and threo und one-halt feet long, having a hole In the center large enough to allow the bar to move -easily Up and down on the Hhuft and Bhapcd ng shown. Tho ends of tho bar may iiIro bo protected by ferrules, A hole la bored In each end ot the bar ami nlso In the upper end of the shaft. Through these holm a piece of strong cord or rawhide Is pasned und drawn .tight, with n bar standing, squared, about ono Inch above the block. Tho cord Is then secured from slipping In the holes by means of kncls and pegs driven In the holes, says tro Metal Worker. A drill Is Inserted In Simple Drilling Machine. tho end of this shaft below tho block, and may bo mado from nn Old handsaw hand-saw Mo ground to a triangular point. To set the machlno In motion, place tho point of the drill on the spot whero tho holo Is to bo mnde, and with tho machlno ma-chlno In an upright position, and while grasping tho bar In one hand, with tho other turn the Bhnft around until the bnr Is raised as high as It will go. Then lay hold of tho bar with both hands nnd press quickly downwards. down-wards. The weight of the block gives sufTtcIent motion to wind up tho cord and ralso tbo bar again, when a second sec-ond downward motion -of tho bar causes a revolution In the opposlto direction. di-rection. In this way tho work Is accomplished ac-complished by pressing down on the bar and allowing It to, rise again as tho cord winds and unwinds upon the revolving shaft. |