Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 483
ledgehammers is slow and costly,while with compressed airas a servant capital work isdone at much lower expense.The drill is provided withhandles so as to be readilymanaged by two men, whoplace the anvil, with itscupped end, on the head ofthe bolt to be driven. Pneu-matic energy does the rest.With… … Little Giant wood-boring machine.Chicago Pneumatic Tool Co. PUMPS OF A NEW KIND 421 vibrated by compressed air; he is now free to use his shovel all the time, so that he does five times as much work as before. Hoists small and large are actuated by the same agency; in every case the mechanism is so…
Inventions · Inventors
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