Designing Valve GearingE. & F.N. Spon, 1875 - 283 σελίδες |
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Σελίδα 1
Edward J. Cowling Welch. 8 DESIGNING VALVE GEARING . THE theorem , proved in the 31st Proposition of the 3rd Book of Euclid's Elements , and stated in the enunciation to be , that " in a circle the angle in a semicircle is a right angle ...
Edward J. Cowling Welch. 8 DESIGNING VALVE GEARING . THE theorem , proved in the 31st Proposition of the 3rd Book of Euclid's Elements , and stated in the enunciation to be , that " in a circle the angle in a semicircle is a right angle ...
Σελίδα 3
... circle , any two of its opposite angles are together equal to two right angles ( Euc . III . 22 ) ; therefore the ... circle A B C , a straight line B F be drawn cutting the circumference in any point A , and from the other end , C , of the B ...
... circle , any two of its opposite angles are together equal to two right angles ( Euc . III . 22 ) ; therefore the ... circle A B C , a straight line B F be drawn cutting the circumference in any point A , and from the other end , C , of the B ...
Σελίδα 4
... circumference of the circle ABC : and therefore , without drawing the perpendicular CA , we know that it would , if drawn , cut the line BF in that point , A , in which this same line BF cuts , or is cut by , the circle A B C ; and it ...
... circumference of the circle ABC : and therefore , without drawing the perpendicular CA , we know that it would , if drawn , cut the line BF in that point , A , in which this same line BF cuts , or is cut by , the circle A B C ; and it ...
Σελίδα 6
... valve has travelled from its central posi- tion A towards D , whilst the ... circle , through one end A of which the line A D is drawn ; then the ... valve has travelled from its central po- sition A towards D , whilst the centre of the ...
... valve has travelled from its central posi- tion A towards D , whilst the ... circle , through one end A of which the line A D is drawn ; then the ... valve has travelled from its central po- sition A towards D , whilst the centre of the ...
Σελίδα 7
... valve circle , A MFP , being supposed to advance with it ) , it will be seen that the radius vector increases in length exactly as the distance between F , the centre of the eccentric sheave , and the line BA increases ; until , when ...
... valve circle , A MFP , being supposed to advance with it ) , it will be seen that the radius vector increases in length exactly as the distance between F , the centre of the eccentric sheave , and the line BA increases ; until , when ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
amount equal amount of lead Bisect brought into gear central position centre line close the port crank reaches crossed rods cutting the arc cutting the line cylinder dead-point describe arcs intersecting describe the arc describe the circle diameter describe divides the arc eccentric rods engine Euclid EXPANSION GEARING expansion valve find the point find the throw full gear given amount given position intersecting the line Join length line A B link diagram link-motion main valve circle main valve eccentric MCNP motion open an amount open rods parallel perpendicular point E point F posi position relative primary main valve Problem proportion radius equal radius rod radius vector reaches the position real position represent the centre represent the position represent the throw required to find right angles shaft single virtual eccentric slider spindle steam-port Stephenson's straight line throw and position triangle valve eccentric sheave valve gear valve-spindle virtual eccentric arm
Δημοφιλή αποσπάσματα
Σελίδα 2 - BAC shall be a right angle; and the angle in the segment ABC, which is greater than a semicircle, shall be less than a right angle ; and the angle in the segment ADC, which is less than a semicircle, shall be greater than a right angle. Join AE, and produce BA to F.
Σελίδα 3 - ABC must be less than a right angle : and therefore the angle in a segment ABC greater than a semicircle, is less than a right angle. And...
Σελίδα 1 - The angle in a semicircle is a right angle; the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle.