Railway Electrical Engineers' Handbook: Electric Light and IlluminationNational Electric Lamp Association, 1912 - 344 σελίδες |
Συχνά εμφανιζόμενοι όροι και φράσεις
active material Allowable variation ammeter ampere-hour amperes angle armature belt cadmium CANDLE POWER CANDLE-POWER DISTRIBUTION CURVES capacity carbon pile circuit circular mils clear bulb color connected copper Cosecant Cube roots Reciprocals Cubes Square roots cubic D-Average spacing diametral pitch dry see note dynamo Effective Lumens Efficiency of MSCP electric electrolyte feet Focal Length foot-candle globes absorb height 1D 1D HOLOPHANE illumination insulation intensity iron lamp regulator Lamp Watts lead oxide lead peroxide Lumens per Lamp Mazda meter MLHCP Mounting Height negative plates number of teeth ohms oxide pilot cell plunger positive plates pounds pulley reading Reflector Reflector Inches dia resistance Revolutions per minute shaft shunt solenoid spacing of outlets specific gravity spongy lead Square roots Cube Squares Cubes Square steel storage battery sulphate sulphuric acid terminal tion train lighting tungsten unit variation in mount voltage voltmeter volts Weight
Δημοφιλή αποσπάσματα
Σελίδα 281 - Dry Measure. — 2 pints = 1 quart; 8 quarts = 1 peck; 4 pecks = 1 bushel. Liquid Measure. — 4 gills = 1 pint; 2 pints = 1 quart; 4 quarts = 1 gallon; 31| gallons = 1 barrel; 2 barrels = 1 hogshead. Long Measure. — 12 inches = 1 foot; 3 feet...
Σελίδα 281 - DIVISIONS OF THE CIRCLE. 60 Seconds = 1 Minute. 60 Minutes = 1 Degree. 30 Degrees = 1 Sign. 90 Degrees = 1 Quadrant. 360 Degrees, or 12 Signs = 1 Circumference. Formerly the subdivisions were carried on by sixties ; thus, the second was divided into 60 thirds, the third into 60 fourths, &c.
Σελίδα 294 - The exponent of the power to which a fixed number called the Base must be raised in order to produce a given number is called the Logarithm of the given number.
Σελίδα 263 - The circular pitch is the distance along the pitch circle from the center of one tooth to the center of the next.
Σελίδα 281 - APOTHECARIES' WEIGHT 20 grains = 1 scruple. 3 scruples = 1 dram. 8 drams = 1 ounce. 12 ounces = 1 pound.
Σελίδα 281 - LONG MEASURE 12 inches = 1 foot. 3 feet = 1 yard. 5% yards = 1 rod. 40 rods = 1 furlong. 8 furlongs -- 1 statute mile. 5 miles = 1 league. MARINERS
Σελίδα 281 - OF TIME. 60 Seconds = 1 Minute 60 Minutes =± 1 Hour 24 Hours = 1 Day 7 Days = 1 Week 28 Days = 1 Lunar Month...
Σελίδα 114 - Current passing in either direction (charge or discharge) decomposes the potassium hydrate of the electrolyte, and the oxidation and reductions at the electrodes are brought about by the action of its elements. An amount of potassium hydrate equal to that decomposed is always re-formed at one of the electrodes by a secondary chemical reaction, and consequently there is none of it lost and its density remains constant.
Σελίδα 281 - Surveyors' Measure. 7.92 inches 1 link, 25 links 1 rod, 4 rods 1 chain, 10 square chains or 160 square rods 1 acre, 640 acres 1 square mile.
Σελίδα 266 - Rule. — Multiply the diameter of the driver by its number of revolutions, and divide the product by the number of revolutions of the driven; the quotient will be its diameter.