How to Succeed as an Inventor / Showing the Wonderful Possibilities in the Field of Invention; the Dangers to Be Avoided; the Inventions Needed; How to Perfect and Develop New Ideas to the Money Making Stage

by Goodwin Brooke Smith

36. Variable radius lever, operated by a crank motion to give variable angular reciprocating motion to a shaft.

37. Hand or power feed-gear, for a drill, boring-machine, &c.

38. A method of doubling the length of stroke of a piston-rod or the throw of a crank. A pinion revolving on a spindle attached to the connecting-rod is in gear with the fixed lower rack and also with the upper rack, which is carried by a guide-rod above and is free to move backward and forward. The connecting-rod communicates to the pinion the full length of stroke, and since the lower rack is fixed the pinion rotates, thus making the upper rack travel twice the length of the stroke.

39. A toggle-joint arranged for a punching-machine. The lever at the right operates upon the joint or knuckle of the toggle on the left, thus raising or lowering the punch.

40. A stone-breaker, with chilled-iron jaw-faces and a toggle or knapping motion.

41. An ellipsograph. The oblique traverse-bar carries two studs, which slide in the grooves of the cross-piece. By the motion of the traverse bar the attached pencil is made to describe an ellipse.

42. Link-motion valve-gear of a locomotive engine. The rods of the two eccentrics on the right are jointed to the curved slotted bar called the link, which can be raised or lowered by the system of levers terminating in the handle at the left. The link carries in its slot a slide and pin connected with another arrangement of levers, which operates on the valve-rod as shown. If the link be so arranged that the slide is at its centre, then the movement of the eccentrics will simply cause the link to oscillate about the pin of the slide, and the valve-rod will be at rest. Otherwise the valve-rod will move, and, if the slide be at an end of the link, steam will be admitted during nearly the whole stroke, but if the slide occupy an intermediate position the period of admission of steam is shorter In the latter case the steam is worked more or less expansively.

43. Joy's locomotive valve-gear operated by the connecting-rod. The rod A is connected to the starting-lever to reverse, vary, or stop the distribution of steam by the slide-valve (cf. 42).

44. Side shaft motion for operating Cornish, Corliss, and spindle valves.