35 - Revolving Tool Station, страница 32Scenes from the Shop Beginning in the 1930's, ► these torpedo levels were a standard item in most any toolbox. Made of either aluminum or wood, they were used extensively by carpenters, plumbers, and electricians. The shape of these levels provided the inspiration for the shop-made level shown on page 6. Around the turn of the ► century, machinists relied on these precision levels to set up and test machinery. With their cast iron bodies and fittings of brass and steel, these old levels are a convincing reminder of the pride in workmanship that goes into a well-made tool. M A groove in the bottom of each of these small pocket levels was designed to fit onto the blade of a framing square. After tightening a simple screw to hold the level in place, a carpenter could quickly estimate the pitch of a roof. |