Morrison's Practical Engineer and Mechanics' GuideBay State Electrotype Foundry, 1895 - 144 σελίδες |
Συχνά εμφανιζόμενοι όροι και φράσεις
angle antimony atmospheric line back pressure belt Bismuth boiler boiling BOSTON Brass calculations cast iron cent centre circumference clearance coal compression condensing Copper cord crank cube cubic feet cubic foot curve cut-off cylinder decimal Diam diameter discharge distance divide the product eccentric electric light equal exhaust expansion Fahr flue fluid gauge given gives head heat horse power indicator diagrams latent heat lead lever locomotive MASS mean effective pressure measure metal Multiply number of days number of revolutions perpendicular pipe piston placed Planimeter plate pounds proportion pulley pump quantity quotient reducing motion revolutions per minute riveted rope rule RULE.-Multiply scale shaft side specific gravity speed square feet square foot square inch steam engine steel stroke subtract temperature tensile strength terminal pressure thickness tion tubes vacuum vapor velocity weight wheels Wrought iron
Δημοφιλή αποσπάσματα
Σελίδα 55 - To find the pressure in pounds per square inch of a column of water, multiply the height of the column in feet by .434. Approximately, we say that every foot elevation is equal to % Ib. pressure per square inch ; this allows for ordinary friction. To find the diameter of a pump cylinder...
Σελίδα 31 - SECTION 1. It shall be unlawful for any person to have charge of, or to operate a steam boiler or engine in this Commonwealth (except locomotive boilers and engines, boilers in private residences, boilers under the jurisdiction of the United States, boilers used for agricultural purposes exclusively, boilers of less than eight horse power...
Σελίδα 55 - The area of the steam piston, multiplied by the steam pressure, gives the total amount of pressure that can be exerted. The area of the water piston, multiplied by the pressure of water per square inch, gives the resistance. A margin must be made between the power and the resistance to move the pistons at the required speed— say from 20 to 40 per cent., according to speed and other conditions.
Σελίδα 32 - SECTION 2. Each of the boilers designated in section one shall be inspected by the inspector of boilers for the district in which said boiler or boilers is located, as thoroughly as in the judgment of the inspector is necessary, and if the inspector so directs, it shall be the duty of the owner or user to have the boiler or boilers blown off dry, and the man-hole and the hand-hole covers thereon removed, ready for inspection upon the day designated by the inspector, the inspector giving the owner...
Σελίδα 33 - All persons violating any of the provisions of this act shall, upon conviction, be punished by a fine not exceeding five hundred dollars, or by imprisonment not exceeding six months, or both, at the discretion of the court.
Σελίδα 108 - Now, an ordinary-sized man can train himself to cover one yard at a stride, on the average, with sufficient accuracy for ordinary purposes. To make use of this means of measuring distances, it is essential to walk in a straight line; to do this, fix the eye on two objects in a line straight ahead, one comparatively near, the other remote; and, in walking, keep these objects constantly in line. Farmers and others by adopting the following simple and ingenious contrivance, may always carry with them...
Σελίδα 32 - SEC. 3. This act shall take effect on the first day of August, in the year eighteen hundred and eighty-five.
Σελίδα 33 - ... boilers fourteen days' notice in writing of the day upon which he will make such internal inspection, provided that such inspection shall not be required oftener than twice a year.
Σελίδα 89 - Repeat these movements deliberately and perseveringly, fifteen times only in a minute. (When the patient lies on the thorax, this cavity is compressed by the weight of the body, and expiration takes place. When he is turned on the side, this pressure is removed, and inspiration occurs.) 6th. When the...
Σελίδα 4 - On cards taken from a condensing engine, however, it is found below the atmospheric line, and at a distance greater or less, according to the vacuum obtained in the cylinder. The point of exhaust closure H is the point where the exhaust valve closes.