MechanismLongmans, Green, and Company, 1905 - 408 страници |
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Страница 23
... speed of each of the pulleys is equal to the speed of the belt , and therefore to each other . Moreover , since the circumferential speed is equal to the angular velocity multi- plied by the radius of the pulley , the angular - velocity ...
... speed of each of the pulleys is equal to the speed of the belt , and therefore to each other . Moreover , since the circumferential speed is equal to the angular velocity multi- plied by the radius of the pulley , the angular - velocity ...
Страница 24
... strictly constant provided ( 1 + 72 ) is constant ; or , in other words , for a crossed belt to work on any pair of pulleys of a speed cone , the sum of the radii of each corresponding pair must be constant ; and if , instead 24 MECHANISM .
... strictly constant provided ( 1 + 72 ) is constant ; or , in other words , for a crossed belt to work on any pair of pulleys of a speed cone , the sum of the radii of each corresponding pair must be constant ; and if , instead 24 MECHANISM .
Страница 26
... speed cones be equal and similar conoids ( as in Fig . 31 ) , having their large and small ends turned in the opposite direction ; and let R , r be the radii of the two ends , and yo the " swell " at the middle section . At either of ...
... speed cones be equal and similar conoids ( as in Fig . 31 ) , having their large and small ends turned in the opposite direction ; and let R , r be the radii of the two ends , and yo the " swell " at the middle section . At either of ...
Страница 28
... speed of rotation of the main shaft , the arrangement ought to be such that the machine may be driven at a number of speeds . These conditions may be readily satisfied by using a countershaft , as it is called , for each machine ...
... speed of rotation of the main shaft , the arrangement ought to be such that the machine may be driven at a number of speeds . These conditions may be readily satisfied by using a countershaft , as it is called , for each machine ...
Страница 29
... speed cone G , keyed to the countershaft , which works with a similar speed cone H , keyed to the spindle of the machine tool ( in the figure , a lathe ) ; so that by shifting the belt on to the different pairs of pulleys , varying speeds ...
... speed cone G , keyed to the countershaft , which works with a similar speed cone H , keyed to the spindle of the machine tool ( in the figure , a lathe ) ; so that by shifting the belt on to the different pairs of pulleys , varying speeds ...
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actuating addendum circle angle angular velocity angular-velocity ratio arc of approach attached axis B.Sc belt bevel wheel block centripetal acceleration circular arc common normal connecting rod connecting-rod coupler crank arm crank pin crank radius crank shaft crosshead Crown 8vo curve cutter cutting cycloidal cylinder described diameter direction displacement distance draw driving ELEMENTARY ellipse engine equal equivalent crank fixed centre gear horizontal Illustrations intersect involute keyed kinematic lathe leading screw length lever line of centres line of stroke machine mandrel mean position meshes move number of teeth obliquity obtained oscillating P₁ P₁A P₂ parallel motion perpendicular pinion piston pitch circle pitch point plane pulley rack radii reciprocating piece relative represent the velocity revolution revolutions per minute roller rolling circle shape shown in Fig sliding slot spindle spur wheel straight line tool tooth trace transmitted turning pairs valve velocity diagram velocity ratio vertical whilst worm wheel
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