Scroll saw

Mark out the shape and size of the blade on a piece of woodin. thick, using a straightedge and a pencil, and allowing a few inches more in length on which to fasten the handle. Cut out the wood with a scroll saw or a keyhole saw, trim the edges down thin and smooth both surfaces with fine sandpaper. The end for the handle is cut about 1 in. wide and 2 in. long. The cross g ard is cut out Ind a hole made... 

Some processes are better performed using power equipment. Power equipment transfers electrical energy to replace the human energy used in hand tools. Two types of power equipment used in the school laboratory are the scroll saw and the drill press. Both tools perform separating processes on wood, metal, and plastic. 

We call a movement that repeatedly goes back and forth a reciprocating motion. An example of a reciprocating motion is the needle of a sewing machine or the saw blade on a scroll saw. 

FIGURE 16-17 Most middle schools use a scroll saw to cut materials. 

The following hand-held powered tools may be equipped with only a positive on-off control switch platen sanders, disc sanders with discs 2 inches or less in diameter, grinders with wheels 2 inches or less in diameter, routers, planers, laminate trimmers, nibblers, shears, scroll saws and jigsaws with blade shanks V4 inch wide or less. 

The scroll was again unrolled, but this time Harford sat obligingly on one edge while Osborne held the other. I leaned forward and saw a detailed plan, drawn to scale, of the front elevation of a house or temple. The central feature was a colonnaded porch with a square wing on either side. The windows were rectangles divided by twelve panes of glass and on the roof, chimneys formed regimented lines. There was even a dome, like a modest St. Paul s. The dome is still under discussion, said Osborne. 

A very handsome weapon is the German halberd of the sixteenth century which is shown in Fig. 7. The entire length is about 6% ft., with a round wooden handle fitt at the lower end with a steel ornament. The length of the spear point to the lower end where it joins on to the handle is 14 in. The extreme width of the axe is 16 or 17 in. The outer and inner edges of the crescent-shaped part of the axe are sharp. This axe is cut out with a scroll or keyhole saw and covered with tinfoil. 

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