Morrison's Practical Engineer and Mechanics' Guide

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Bay State Electrotype Foundry, 1895 - 144 Seiten
 

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Seite 47 - 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...
Seite 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...
Seite 47 - 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.
Seite 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...
Seite 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.
Seite 107 - 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...
Seite 32 - SEC. 3. This act shall take effect on the first day of August, in the year eighteen hundred and eighty-five.
Seite 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.
Seite 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...
Seite 11 - 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.

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