The Mechanics' Handbook: A Convenient Reference Book for All Persons Interested in Mechanical Engineering, Steam Engineering, Electrical Engineering, Railroad Engineering, Hydraulic Engineering, Bridge Engineering, EtcInternational Textbook Company, 1904 - 218 σελίδες |
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Σελίδα 242
... station . The keys k , k ' are of the double - contact type , making connections normally between B L G bell b or b ' and line wire L. FIG . 5 . When one key , as k , is depressed , a current from B flows along the wire through the ...
... station . The keys k , k ' are of the double - contact type , making connections normally between B L G bell b or b ' and line wire L. FIG . 5 . When one key , as k , is depressed , a current from B flows along the wire through the ...
Σελίδα 246
... station and isolated plants . Testing circuits for grounds with a battery and bell is not considered a reliable test . Preference is given to switches constructed with a lapping connection , so that no electric arc can be formed at the ...
... station and isolated plants . Testing circuits for grounds with a battery and bell is not considered a reliable test . Preference is given to switches constructed with a lapping connection , so that no electric arc can be formed at the ...
Σελίδα 275
... station A , and is equal to the resistance of that portion of the cable between the station and the fault plus the resistance of the fault , that is , x + R. B is then grounded at G ' , and the resistance is y R y + R Let Let Let Then ...
... station A , and is equal to the resistance of that portion of the cable between the station and the fault plus the resistance of the fault , that is , x + R. B is then grounded at G ' , and the resistance is y R y + R Let Let Let Then ...
Σελίδα 277
... STATION N 78 ° W Q & P.R.R FIG . 2 . is reached , which has been previously de- cided on as a proper place for changing the direction of the line . The compass having been set up at E , the bearing of the line A E , which is the line ...
... STATION N 78 ° W Q & P.R.R FIG . 2 . is reached , which has been previously de- cided on as a proper place for changing the direction of the line . The compass having been set up at E , the bearing of the line A E , which is the line ...
Σελίδα 278
... ( Station ) E , namely , 4 + 40 , and the bearing of A E are then recorded by the compassman . By this time the chief ... station numbers , the notation running from the bottom to the top of the page . By means of this arrangement , the ...
... ( Station ) E , namely , 4 + 40 , and the bearing of A E are then recorded by the compassman . By this time the chief ... station numbers , the notation running from the bottom to the top of the page . By means of this arrangement , the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
amperes armature battery beam boiler bolts center of gravity center of percussion change gear chord deflection circle circuit column headed corresponding cubic cylinder decimal point Diam diameter difference divided draw dynamo electromotive force engine enrolled equal feet formula fraction frog distance gauge gear h given number heat Hence horsepower inertia iron lead screw Leclanché cells length mantissa mean effective pressure measured moment of inertia motor multiplied number of teeth number of threads obtained ohms P. P. TABLE perpendicular pipe piston pitch pounds pressure produce pulley quantities quotient radius radius of gyration rail resistance root rope shaft shown in Fig side significant figures square inch steam subtracted surface switch TABLE Continued tangent deflection temperature three figures tion triangle turnout curve valve velocity vertical volts weight wire wrought iron Zinc
Δημοφιλή αποσπάσματα
Σελίδα 2 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq. mi.) Cubic Measure 1728 cubic inches (cu.
Σελίδα 3 - TROY WEIGHT. 24 grains (gr.) 1 pennyweight (pwt.) 20 pennyweights, 1 ounce (oz.) 12 ounces ... 1 pound (Ib.) Troy weight is used in weighing gold, silver, precious stones, etc. APOTHECARIES
Σελίδα 3 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt.) 4 quarts = 1 gallon (gal...
Σελίδα 2 - SURVEYORS' SQUARE MEASURE. 144. This measure is used by surveyors in computing the area or contents of land. TABLE. 625 Square Links (sq. 1. ) make 1 Pole P. 16 Poles " 1 Square Chain . sq. ch. 10 Square Chains " 1 Acre A. 640 Acres " 1 Square Mile . . sq. mi. 36 Square Miles (6 miles square)
Σελίδα 2 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu.
Σελίδα 6 - Measures of Capacity 10 milliliters (ml) =1 centiliter cl 10 centiliters =1 deciliter dl 10 deciliters =1 liter 1 10 liters =1 dekaliter Dl 10 dekaliters =1 hektoliter HI 10 hektoliters =1 kiloliter Kl NOTE — The liter is equal to the volume occupied by 1 cubic decimeter.
Σελίδα 25 - This is called the total heat of vaporization, or simply total heat. It is plain that the total heat is the sum of the heat of the liquid and the latent heat. That is, total heat = heat of liquid + latent heat.
Σελίδα 42 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.
Σελίδα 5 - Measures of Length. 10 millimeters (mm.) 1 centimeter (cm.) 10 centimeters 1 decimeter (dm.) 10 decimeters 1 meter (m.) 10 meters 1 dekameter (Dm.) 10 dekameters 1 hectometer (Hm.) 10 hectometers 1 kilometer (Km.) 10 kilometers 1 myriameter (Mm.) 1181.
Σελίδα 189 - Fig. /», the valve is shown In its extreme position at the right. The distance marked m is the maximum port opening. It matters not whether the outer edge of the valve travels beyond the inner edge of the port or falls short of it, as in the...