A Treatise on the Teeth of Wheels: Demonstrating the Best Forms which Can be Given to Them for the Purposes of Machinery; Such as Will-work and Clock-work, and the Art of Finding Their Numbers

Front Cover
M. Taylor, 1842 - Gearing - 181 pages

Selected pages

Other editions - View all

Common terms and phrases

Popular passages

Page 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.
Page 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...
Page 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.
Page 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...
Page 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...
Page 119 - To find the numbers of the teeth and leaves of the wheels and pinions of a machine, which being moved by a pinion placed on the spindle of the minute wheel of a clock, shall cause a wheel to make a revolution in 29 days, 12 hours, 44 minutes, 3 seconds, and 12 thirds, which form a mean synodical revolution of the moon.
Page 161 - ... inch from the ends of the teeth at the line of centres ; the ends of the teeth were one inch from the bottoms of the spaces ; the tangent of contact formed an angle of full twenty degrees with the line of centres. In a great number of repetitions of this experiment, a slight receding of sector N0. 2 sometimes appeared. EXPERIMENT VI. The teeth were engaged a quarter of an inch : the ends of the teeth, therefore, were one inch and a quarter from the bottoms of the spaces ; and the points of contact,...
Page 173 - ... true principles. We regret to learn, from the same authority, that there are many wheel-makers who follow no rule of proportion at all in their formation. "In Lancashire, they make the teeth of watch-wheels of what is called the bay-leaf pattern; they are formed altogether by the eye of the workman, and they would stare at you for a simpleton, to hear you talk about the epicycloidal curve.
Page 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,

Bibliographic information