How to make inventions; or, Inventing as a science and an art (1893)
Thompson, Edward P · New York, D. Van Nostrand co · leaf 178
es as desired, but under thefollowing restrictions: 1. No crank and pitman, nor any analogue of this mechanicalmovement, as crank and slotted crosshead can be used. 2. The rack and pinion movement cannot be used. 3. No screw thread can be employed to affect the requiredmotion. 4. No spur gearing or… … 9. A very common accident on cable railways is that inwhich people are thrown off the platform when the engineerputs the final grip upon the cable. A peculiar motion occurs,which has thrown some of the nimblest men. 10. In large buildings in New York, and other large cities,it occupies the letter…
Inventions
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