The merchants' and iron trades' guide |
Beliebte Passagen
Seite 418 - ... pitches being effected generally by means of one wheel and one pinion with a carrier, or intermediate wheel, which cause no variation or change of motion to take place : hence the following RULE. — Divide the number of threads in a given length of the screw which is to be cut, by the number of threads in the same length of the leading screw attached to the lathe ; and the quotient is the ratio that the wheel on the end of the screw must bear to that on the end of the lathe spindle.
Seite 559 - ... by machine is considerable, we may fairly assume the following relative strengths as the value of plates with their riveted joints : — Taking the strength of the plate at .... 100 The strength of the double-riveted joint would then be 70 And the strength of the single-riveted joint...
Seite 418 - ... wheels at pleasure, as those for the spindle and stud-wheels, — then multiply the number of teeth in the spindle-wheel by the ratio of the screw, and by the number of teeth in that wheel or pinion which is in contact with the wheel on the end of the screw ; divide the product by the stud-wheel in contact with the spindle-wheel, and the quotient is the number of teeth required in the wheel on the end of the leading screw.
Seite 482 - AND ANY DIAMETER REQUIRED. Rule. — To the interior diameter of the pipe, in inches, add the thickness of the metal; multiply the sum by the decimal numbers opposite the required thickness, and under the metal's name; also, by the length of the pipe in feet; and the product is the weight of the pipe in Ibs.
Seite 454 - ... miles per hour, at which pace he conceived that 16 miles per day might be considered a fair day's work; this therefore was double the distance with four times the load, or eight times the coach-work, but with a heavier horse. The law that the quantity of work done, was as the square root of the velocity, or, as the cube root of the velocity, in equal times, was confined to work upon canals, or bodies moving through water.
Seite 382 - is the expense incurred by the bill being dishonored in a foreign country in which it was payable, and returned to the country in which it was made or endorsed, and there taken up.
Seite 585 - That in each case, the coefficient of the second term is the same with the index of the given power. Thus, in the square it is 2 ; in the cube it is 3 ; in the fourth power it is 4 ; and so of the rest.
Seite 419 - ... threads in an inch. and that a wheel of 60 teeth is fixed upon for the end of the spindle, 20 for the pinion in contact with the screw-wheel, and 100 for that in contact with the wheel on the end of the spindle ; — required the number of teeth in the wheel for the end of the leading screw.
Seite 468 - Ex. 4. A ball weighing 20 Ibs. is projected, with a velocity of 60 ft. per second, on a bowling green. What space will the ball move over before it comes to a state of...
Seite 590 - Surface, or Square Measure. 144 square inches make 1 square foot 9 square feet make 1 square yard 30| square yards make 1 square rod...