A Treatise on the Teeth of Wheels: Demonstrating the Best Forms which Can be Given to Them for the Purposes of MachineryJames S. Hodson, 1837 - 181 páginas |
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A Treatise on the Teeth of Wheels: Demonstrating the Best Forms which Can be ... Charles-Étienne-Louis Camus Visualização completa - 1837 |
A Treatise on the Teeth of Wheels: Demonstrating the Best Forms which Can be ... M. Camus Visualização completa - 1837 |
Termos e frases comuns
angle axis base bay leaf Camus circle RES circular segment circum convex surface Corollary cumference cuts the line cycloid decomposed describe divided drawn engagement epicy equal equation exterior factors ference finding the numbers force fraction Fx G FxGx H G x H given Hence High Holborn Imison's Elements impelling inch involute last pinion leaf line of centres machine move the pinion move the rung moved uniformly multiplied number of revolutions number of teeth perpendicular pinion H pinion of seven pitch-line plane point of contact portion primitive circle primitive circumference primitive pinion primitive radius primitive wheel proper for moving radii represented revolve rungs infinitely small segment shewn side space spherical cone spherical epicycloid straight line HEI straight line RT suppose teeth and leaves teeth of wheels templet tion tooth RX touch traced true radius velocity wheel and pinion wheel or pinion whole number
Passagens mais conhecidas
Página 122 - If I am going to be made a noncommissioned officer next ironth, I am going to be a noncommissioned officer maybe 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 years before I ever get to go to the noncommissioned officer school.
Página 174 - Mr. Saxton of Philadelphia, now in London — who is justly celebrated for his excessively acute feeling of the nature and value of accuracy in mechanism, and who is reputed not to be excelled by any man in Europe or America for exquisite nicety of workmanship...
Página 175 - ... possible : this plate forms the base of the epicycloid. On the other vertical arbor is a similar plate, but equal in diameter to the radius of the primitive circle of the wheel to be engaged with that about to be rounded : this plate is the generating circle.
Página 172 - ... tooth, at the primitive circle (pitch-circle), and with the other point describe a segment of a circle for the off side of the next tooth. . . . Others set the point of the compasses at different distances from the center of the tooth, nearer or farther off; also within or without the line of centers, each according to some inexplicable notion received from his grandfather or picked up by chance. It is said inexplicable, because no tooth bounded at the sides by segments of circles can work together...
Página 143 - ... have been so misled by this misconception of the original translator of Camus, that they are daily ''pouring into the market multitudes of cast-iron wheels and pinions, of various magnitudes, for cotton and other machinery, with teeth formed from the epicycloid of the diameter, instead of the radius of the opposite wheel, or pinion,
Página 172 - We have no method but the rule of thumb ; " another, " We thumb out the figure ; " by both which expressions may be understood, that they left their workmen to take their own course. Some set one point of a pair of compasses in the centre of a tooth, at the primitive circle, and with the other point describe a segment of I a circle for the off-side of the next tooth.
Página x - The same machine can be also readily arranged for cutting worm-wheel teeth, or for bevel gear. The best form which can be given to the teeth of wheels is that which will cause them to be always, in regard to the power they mutually exert, in equally favourable situations, and, consequently, will give the machine the property of being moved uniformly by a power constantly equal.
Página 109 - ... may give a product as near as possible to a whole number. In general, this is done by repeated trials; but as this method is defective, we shall here propose another, by which the problem may be solved with more certainty.
Página 174 - ... man in Europe or America for exquisite nicety of workmanship ; made in Philadelphia, an instrument for cutting the teeth of watch wheels, truly epicycloidal ; or rather for curving them after they were cut down in the ordinary manner, with radial faces. The following, is his verbal description of this instrument. The wheel to be rounded being put on a vertical arbor, another arbor...
Página 146 - Camus' demonstrations; and have been a fruitful source of error in English mechanical practice. Camus proved clearly that the epicycloidal part of a tooth, designed to act on another wheel or pinion, ought to be generated by a circle equal to the radius of the wheel or pinion with which it is to be engaged ; while his English translator represented his meaning to be, that it should be equal to the diameter! Mr. JI Hawkins, who has lately favoured the public with a more correct edition of the treatise...