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

45. The "Geneva stop", used in Swiss watches to limit the number of revolutions in winding up. The convex part a b of the upper wheel acts as the stop.

46. A form of strap brake used in cranes and other hoisting-machines. If the lever be depressed the ends of the brake-strap are drawn toward each other, and the strap is thus tightened on the brake-wheel.

47. A dynamometer, used to ascertain the amount of useful effect given out by a motive-power. A is a smooth pulley secured on a shaft as near as possible to the motive-power. Two blocks of wood, or one block and a series of straps fastened to a band or chain, are fitted to the pulley, and these are so arranged as to bite or press upon the pulley by means of the screws and nuts on the top of the lever D. At the end of D is a scale, and the stops C, C' prevent the lever from travelling far from the horizontal position. The shaft being in motion, the screws are tightened and weights are placed in the scale until the lever takes the position shown at the required rate of revolution. The useful effect is then represented by the product of the weight added and the velocity at which the point of suspension of the scale would revolve if the lever were attached to the shaft.

48. A diagrammatic sketch of a form of groove for ball-bearings, running horizontally, showing the points of bearing in the grooves.

49. A diagrammatic sketch of a roller bearing for a vertical shaft, with steel balls between the ends of the cone-rollers to separate them and reduce their friction.

50. A diagrammatic sketch of a roller bearing for a wagon axle, with balls between the roller ends to separate them and prevent internal friction. Two views of the bearing are shown in order to make the arrangement perfectly clear.

51. A recoil escapement for clocks. The anchor H L K is made to oscillate on the axis a by the swing of the pendulum. The teeth of the escapement-wheel A come alternately against the outer surface of the pallet A and the inner surface of the pallet D. The pallets are not concentric to the axis a, and therefore a slight recoil of the wheel takes place after the escape of a tooth (whence the name of the escapement). When the pallets leave a tooth the teeth slide along their surfaces, giving an impulse to the pendulum.

52. A dead-beat or repose escapement for clocks. The lettering is as in the preceding. The pallets are concentric with the axis a, and thus while a tooth is against the pallet the wheel is stationary.