Arc Lamp Concordance
Arc Lamp
Section titled “Arc Lamp”Concordance status: generated from processed OCR/PDF text. Treat these as source-location aids until each passage is checked against the scan.
174 hits
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10 sources
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32 sections
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Matched Aliases
Section titled “Matched Aliases”Arc lamp, arc lamp, arc lamps, arc light, arc lighting, arc-lamp
Source Distribution
Section titled “Source Distribution”| Source | Hits | Sections |
|---|---|---|
| Radiation, Light and Illumination | 102 | 9 |
| General Lectures on Electrical Engineering | 41 | 5 |
| Theory and Calculation of Electric Circuits | 9 | 6 |
| Theory and Calculation of Transient Electric Phenomena and Oscillations | 7 | 3 |
| Theory and Calculation of Electric Apparatus | 6 | 3 |
| Theoretical Elements of Electrical Engineering | 4 | 2 |
| Engineering Mathematics: A Series of Lectures Delivered at Union College | 2 | 1 |
| Theory and Calculation of Alternating Current Phenomena | 1 | 1 |
| Theory and Calculation of Alternating Current Phenomena | 1 | 1 |
| Theory and Calculation of Alternating Current Phenomena | 1 | 1 |
Section Hits
Section titled “Section Hits”Representative Source Snippets
Section titled “Representative Source Snippets”Lecture 8: Arc Lamps And Arc Lighting - 70 hit(s)
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LECTURE VIII. ARC LAMPS AND ARC LIGHTING. Volt- Ampere Characteristics of the Arc. 62. The voltage consumed by an arc, at constant current, increases with increase of arc length, and very closely propor- tional thereto. Plotting the arc voltage, e, as function of the 190 1 ...Lecture 17: Arc Lighting - 36 hit(s)
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SEVENTEENTH LECTURE ARC LIGHTING W"^HILE incandescent lamps can be operated on constant potential as well as on constant current, the arc is —^ essentially a constant current phenomenon. At con- stant length, the voltage consumed by the arc decreases with increase of current, as shown ...Lecture 10: Light Flux And Distribution - 9 hit(s)
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... at is, the cylinder, the circular line or circular cylinder and combinations thereof. 87. Very frequently the intensity distribution of an illumi- nant is symmetrical, or approximately symmetrical, around an axis. This, for instance, is the case with the arc lamp, the incandescent lamp, most flames, etc. If the distribution is perfectly symmetrical around an axis, the distribution in space is characterized by that in one meridian, that is, one plane pass- ing through the axis. If the distribution is not symmetrica ...Lecture 9: Measurement Of Light And Radiation - 7 hit(s)
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... In such cases, frequently lights of intermediary color are used to reduce the differences in each observation. Thus the carbon filament lamp is compared with the tungsten lamp, the MEASUREMENT OF LIGHT AND RADIATION. 173 tungsten lamp with the carbon arc lamp, and the latter with the mercury arc lamp. Hereby the uncertainty of each obser- vation is reduced by the reduced color difference. In the final result, however, the comparison of the carbon incandescent- lamp standard and the mercury arc lamp no advantag ...Chapter 4: Arc Rectification - 5 hit(s)
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... ridge. This can be done by bringing the terminals into contact and so starting the current, and then by gradually withdrawing the terminals derive the energy of the arc flame by means of the current, from the electric circuit, as is done in practically all arc lamps. Or by increasing the voltage across the gap between the terminals so high that the electrostatic stress in the gap repre- sents sufficient energy to establish a path for the current, i.e., by jumping an electrostatic spark across the gap, this spark is fo ...Lecture 5: Temperature Radiation - 4 hit(s)
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... he highest attainable temperature, the boiling point of carbon, the efficiency is much lower, probably below 10 per cent and this would be the highest efficiency attainable by normal temperature radiation. It is utilized for light production in the carbon arc lamp. The carbon arc flame gives practically no light, but all the light comes from the incandescent tips of the carbon electrodes, mainly the positive, which are at the boiling point of carbon and thus give the most efficient temperature radiation. Obviousl ...Lecture 6: Luminescence - 4 hit(s)
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... iciently large not to get too hot, does not con- sume; only the negative terminal of the arc consumes in feeding the arc flame, that is, supplying the vapor conductor, but the positive is inherently non-consuming, and may be made a perma- nent part of the arc-lamp mechanism. On the contrary, if the positive is made so large that its temperature remains very much below the arc temperature, condensation of the arc vapor occurs at it, and it builds up, that is, increases in size. Consumption of the positive terminal i ...Lecture 12: Illumination And Illuminating Engineering - 4 hit(s)
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... dirt or age, thus are made more distinct by using an illuminant defi- cient in the long waves of light, as the mercury lamp, while in- versely they are decreased by using a reddish-yellow illuminant, as the incandescent lamp or the candle. Thus the white arc lamp and still more so the bluish-green mercury lamp shows blemishes and slight color differences of age and dirt harsh and exaggerated, while the yellow light softens them and makes them disappear; and while, for a ballroom, the yellow light is thus preferred ...Apparatus Introduction 21: Introduction - 3 hit(s)
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... tus is unsatisfactory, since it includes in the same class apparatus of entirely different character, as the induction motor and the alternating-current generator, or the constant-potential commutating machine and the rectifying arc light machine. Thus the following classification, based on the characteristic features of the apparatus, as adopted by the A. I. E. E. Standard- izing Committee, is used in the following discussion. It refers only to the apparatu ...Chapter 23: Review - 3 hit(s)
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... 141-144. A quarter-phase constant- current alternator with rectifying commutators. Thomson-Houston Arc Machine. — 141-144. A three-phase F-connected constant-current alternator with rectifying commu- tator. The development of alternating-current series arc lighting by constant-current transformers greatly reduced the importance of the arc machine, and when in the magnetite lamp arc lighting returned to direct current, the development of the mercury-arc rectifier superseded the arc machine. Asynchronous Motor. — Na ...Chapter 7: Numerical Calculations - 2 hit(s)
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... g the meaning of the numerical value, as regards its accuracy. This is not always realized, and especially in the reduction of common fractions to decimals an unjustified laxness exists which impairs the reliability of the results. For instance, if in an arc lamp the arc length, for which the mechanism is adjusted, is stated to be 0.8125 inch, such a statement is ridiculous, as no arc lamp mechanism can control for one-tenth as great an accuracy as implied in this numerical value: the value is an unjustified trans ...Lecture 1: General Review - 2 hit(s)
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... c system, only the two standard frequencies, 25 and 60 cycles, come into considera- tion. b. Constant current, either alternating or direct, that is, a current of constant amperage, varying in voltage with the load, is mostly used for street lighting by arc lamps; for all other purposes, constant poteatial is employed. 1 2 GENERAL LECTURES c. For long distance transmission, the highest permis- sible voltage is used ; for primary distribution by alternating current, 2200 volts, that is, voltages between 2000 an ...Lecture 1: Nature And Different Forms Of Radiation - 2 hit(s)
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... we are close to the limit of temperature which even tungsten can stand, and to show you light of high frequency or short wave length I use a different apparatus in which a more direct conversion of electric energy into radiation takes place, — the mercury arc lamp. Here the light is bluish green, containing only the highest frequencies of visible radiation, violet, blue and green, but practically none of the lower frequencies of visible radiation, red or orange. FIG. 11. In the tungsten lamp at high brilliancy ...Chapter 15: Synchronous Rectifier - 2 hit(s)
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... s. As mechanical rectifiers, mainly single-phase, they have found a limited use for small powers since a long time, and during the last years arc rectifiers have found extended use for small and moderate powers, for storage-battery charging and for series arc lighting by constant direct current. For large powers, however, the rectifier does not appear applicable, but the synchronous converter takes its place. The two most important types of direct-current arc-light ma- chines, however, have in reality been mechanical r ...Chapter 10: Instability Of Circuits : The Arc - 2 hit(s)
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... electric circuits, they either remained imunderstood or the theo- retical study was limited to the specific phenomenon, as in the case of lightning, dropping out of step of induction motors, hunt- ing of synchronous machines, etc., or, as in the design of arc lamps and arc-lighting machinery, the opinion prevailed that theoretical calculations are impossible and only design by trying, based on practical experience, feasible. The first class of imstable phenomena, which was systemat- ically investigated, were the t ...Chapter 14: Constant-Potential Constant-Current Trans Formation - 2 hit(s)
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... nstant alternating voltage, or inversely, constitutes a good application of the terms "impedance," admittance," etc., and offers a large number of problems or examples for the symbolic method of dealing with alternating-current phenomena. Even outside of arc lighting, such combinations of inductance and capacity which t«nd toward constant-voltage constant-cur- rent transformation are of considerable importance as a poffsiblo source of danger to the system. In a constant-current circuit, the load is taken off by short- ...Chapter 15: Constant-Voltage Series Operation - 2 hit(s)
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... tion of each device. In such a case, series connection of the devices is the most eco- nomical arrangement, and therefore conmionly used. Such for instance is the case in lighting the streets of a city, etc. Most of the street lighting has been done by arc lamps operated on constant-current circuits, and as the imiversal electric power supply today is at constant voltage, transformation from constant voltage to constant current thus is of importance, and has been discussed in Chapter XIV. The constant-current s ...Lecture 4: Load Factor And Cost Of Power - 1 hit(s)
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... n are partly fixed cost A, partly proportional cost B, — economy of operation requires therefore a shifting of as large a part thereof over into class B, by shutting down smaller substations during periods of light load, etc. Incandescent lamp renewals, arc lamp trimming, etc., are essentially proportional costs, B. The reserve capacity of a plant, the steam reserve main- tained at the receiving end of a transmission line, the difference in cost between a duplicate pole line and a single pole line with two circ ...