MechanismLongmans, Green, and Company, 1905 - 408 páginas |
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Página 116
... extreme positions of the tracing point A ( Fig . 117 ) would be at equal distances on either side of the line of stroke of B , and the point D would describe a short circular arc of centre Q , say . The length of the radius . QD will ...
... extreme positions of the tracing point A ( Fig . 117 ) would be at equal distances on either side of the line of stroke of B , and the point D would describe a short circular arc of centre Q , say . The length of the radius . QD will ...
Página 118
... extreme and mean positions of the mechanism . In such a case , if the length of the link AB and the position of the pin D in it be known , the centre Q , and the length of the radius QD , may be graphically obtained as follows : - Let ...
... extreme and mean positions of the mechanism . In such a case , if the length of the link AB and the position of the pin D in it be known , the centre Q , and the length of the radius QD , may be graphically obtained as follows : - Let ...
Página 119
... extreme positions , as well as in the mean position , of the mechanism . D § 85. Roberts ' Parallel Motion . - In Roberts ' motion ( Fig . 121 ) the levers , PB and PD , are equal , and in the mean position of the mechanism the coup ...
... extreme positions , as well as in the mean position , of the mechanism . D § 85. Roberts ' Parallel Motion . - In Roberts ' motion ( Fig . 121 ) the levers , PB and PD , are equal , and in the mean position of the mechanism the coup ...
Página 122
... extreme positions , is given ; but the calculation would be complex , and need not be discussed . Now , for a given limit of oscillation , that is to say , for a given stroke of the tracing point , the error of deviation will clearly be ...
... extreme positions , is given ; but the calculation would be complex , and need not be discussed . Now , for a given limit of oscillation , that is to say , for a given stroke of the tracing point , the error of deviation will clearly be ...
Página 123
... extreme positions equal and opposite to that in the mean position , and also by making the tracing point lie exactly in the required straight line in the two extreme and mean positions . To satisfy these conditions , the levers must be ...
... extreme positions equal and opposite to that in the mean position , and also by making the tracing point lie exactly in the required straight line in the two extreme and mean positions . To satisfy these conditions , the levers must be ...
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Términos y frases comunes
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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