| 单词 | secondary coil |
| 例句 | The magnetic field created by the primary is mostly confined to and increased by the core, which transmits it to the secondary coil. College Physics for AP Courses 2015-08-12T00:00:00Z Again to improve, the secondary coil is made to partly overlap the primary, so that it cannot free itself from a strong inductive action of the latter, repel its lines as it may. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z This action, by varying the magnetic flux through the secondary coil, creates in it an electromotive force which causes a sound to be heard in the telephone connected to it. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z In the induction-coil it is the change in the magnetic field that causes a current to flow in the secondary coil. The Story of Great Inventions 2011-10-05T02:00:16.353Z The best method of producing a smooth current in the secondary coil is for the interruptor hammer to vibrate directly against the iron core of the primary coil. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Some transformers even provide a variable output by allowing connection to be made at different points on the secondary coil. College Physics for AP Courses 2015-08-12T00:00:00Z In this experiment the primary coil should be preferably placed so that it extends only about half way into the secondary coil. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Secondly, the magnetising current is stopped, and soon after that the secondary coil is unshort-circuited and connected to the galvanometer, and remains in this condition during the remainder of the revolution. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z This rapidly changing magnetic field induces a current in the secondary coil. The Story of Great Inventions 2011-10-05T02:00:16.353Z For this it is best that the interruptor be made of a piece of steel spring, as a high rate of interruption can then be maintained, with a fairly smooth current in the secondary coil. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The currents Ip and Is in the primary and secondary coils are related by Is = Np . College Physics for AP Courses 2015-08-12T00:00:00Z Over these coils are then wound shorter coils of coarser wire, C C C' C', to constitute the induced or secondary coils. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The demagnetisation of the iron which ensues produces an electromotive force in the secondary coil and causes a deflection of the galvanometer, and this deflection will continue and remain steady if the oscillation persists. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z There must be a battery of Leyden jars in the circuit of the secondary coil. The Story of Great Inventions 2011-10-05T02:00:16.353Z A current is started with the secondary coil in such a position as to give only an extremely weak current. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The two coils are called the primary and secondary coils. College Physics for AP Courses 2015-08-12T00:00:00Z Mr. Tesla has applied his principle of magnetic shielding of parts to the construction also of transformers, the shield being interposed between the primary and secondary coils. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Hence this break increases the current, but not the electromotive force in the secondary coil. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z If the pressure or voltage of the secondary coil is less than that of the primary, we have a "step-down" transformer. The Story of Great Inventions 2011-10-05T02:00:16.353Z The secondary coil is over fifty miles in length, and is made of No. 36 wire, which is but .005 of an inch in diameter. The Telephone An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action “I was sure it was in the secondary coil,” came from Jack. The Motor Girls on the Coast or, The Waif From the Sea The secondary coil of the regulator includes the other coils, R R, of the motor. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z For the secondary coil use the same size of wire and of core. Letters of a Radio-Engineer to His Son The pulsations set up by transmitter T in primary coil P are magnified by secondary coil S for transmission through the line circuit, and affect both receivers. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use When the battery current is broken, the iron loses its magnetism, and a current of electricity is again started in the secondary coil in the opposite direction. The Telephone An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action To start the secondary coil, make a pinhole, L, just outside of the insulation, K, of the primary coil. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity The cross-circuit wires l m, making these connections, are then connected to the common return-wire D. The secondary coils p' p'' are in circuits n o, including, for example, incandescent lamps. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z To operate, leave the switch S open, place the primary and secondary coils near together as in the figure and listen. Letters of a Radio-Engineer to His Son The core becomes a powerful magnet with external lines of force passing from one pole to the other over and among the turns of the secondary coil. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The wires, to supply the lamps, run from the secondary coil. Electricity for Boys The primary coil should be made of 3 layers of wire, which should be coarser than that used for the secondary coil. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity I join the terminals of the secondary coil to these terminals and insert the primary p, between the insulated plate P1, and the terminal T1, of the induction coil as before. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z You will want to vary the position of the primary and secondary coils, that is, vary their coupling, for you will get sharper tuning as they are drawn farther apart. Letters of a Radio-Engineer to His Son Is there heat enough developed in the secondary coil of an induction coil to prevent the use of paraffine as an insulating material? Scientific American, Volume 40, No. 13, March 29, 1879 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures When a current passes through the primary coil, the surging movement, heretofore explained, is transmitted to the iron core, and the iron core, in turn, transmits this electrical energy to the secondary coil. Electricity for Boys Wires lead from the secondary coils to two platinum points placed a fraction of a millimeter from the periphery of the drum. Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Federal Investigations of Mine Accidents, Structural Materials and Fuels. Paper No. 1171 The lines of magnetic force collapse, however, and have their effect in the enormous potential set up in the secondary coil. Scientific American Supplement, No. 711, August 17, 1889 You will need to wind another coil like the secondary coil you already have. Letters of a Radio-Engineer to His Son The primary coils are filled with mercury, the secondary coils form continuous closed circuits. Scientific American Supplement, No. 810, July 11, 1891 The primary coil receives the current from the battery, or source of electrical power, and the secondary coil receives charges, and transmits the current. Electricity for Boys Again to improve, the secondary coil is made to overlap partly the primary, so that it cannot free itself from a strong inductive action of the latter, repel its lines as it may. Experiments with Alternate Currents of High Potential and High Frequency Take away the secondary coil so as to stop that outlet, the energy expends itself on the iron core and the primary coil. Scientific American Supplement, No. 711, August 17, 1889 You will need about 80 feet and might buy 200 to have enough for the secondary coil. Letters of a Radio-Engineer to His Son After the secondary coil is wound it should be covered with stiff paper, and the whole coil, including the wood ends, should then be enameled black. The Boy Mechanic: Volume 1 700 Things for Boys to Do Induction Coil and Circuit The current passes, by induction, from the primary to the secondary coil. Electricity for Boys The spark from the secondary coil of an inductorium was delivered from a wire near the tip of the fork. Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis The current is passed through the smaller, inside coil, and each time that it is stopped, or started, there will be an impulse, and a very strong one, through the outer—the secondary coil. Steam, Steel and Electricity The voltage of the grid of the modulator tube is varied by the secondary coil of the induction coil or microphone transformer, above described. The Radio Amateur's Hand Book The intermittent, or rather alternating, currents from the secondary coil are often applied to the body in certain nervous disorders. The Story of Electricity There is no electrical connection between the two coils, but the action from the primary to the secondary coil is solely by induction. Electricity for Boys The spark from secondary coil of the inductorium passed from the platinum tip, piercing the paper. Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis TRANSFORMER.—A primary and a secondary coil for stepping up or down a primary alternating or oscillating current. The Radio Amateur's Hand Book The Oscillation Transformer.—The tuning coil, or oscillation transformer as this one is called, is a conductively coupled tuner—that is, the primary and secondary coils form one continuous coil instead of two separate coils. The Radio Amateur's Hand Book The high voltage secondary coil which energizes the plate has an output of 175 watts and develops a potential of from 350 to 1,100 volts. The Radio Amateur's Hand Book The Interrupter.—One other piece of mechanism is necessary, and that is an Interrupter, for the purpose of getting the effect of the pulsations given out by the secondary coil. Electricity for Boys The low voltage secondary coil which heats the filament has an output of 175 watts and develops 7.5 volts. The Radio Amateur's Hand Book The filament voltmeter is connected across the filament secondary coil terminals, while the plate milli-ammeter is connected to the mid-taps of the plate secondary coil and the filament secondary coil. The Radio Amateur's Hand Book The filament terminal takes a current of 7.5 volts and this is supplied by another secondary coil of the transformer. The Radio Amateur's Hand Book Now connect one end of the secondary coil, or rotor, of the variocoupler with one post of the .0005 mfd. variable condenser and the other part to the grid of the detector tube. The Radio Amateur's Hand Book Connecting Up a Condenser.—When completed, one end of the condenser is connected up with one terminal of the secondary coil, and the other end of the condenser with the other secondary terminal. Electricity for Boys Likewise connect the other loading coil in one side of the closed, or secondary circuit between the variable .0007 mfd. condenser and the secondary coil of the loose coupler or variocoupler as shown in Fig. The Radio Amateur's Hand Book The Magnetic Modulator.—This is a small closed iron core transformer of peculiar design and having a primary and a secondary coil wound on it. The Radio Amateur's Hand Book It will be observed that a storage battery is not needed as the secondary coil of the transformer supplies the current to heat the filament of the oscillator. The Radio Amateur's Hand Book When the alternating, but high potential, currents which are developed by the secondary coil, reach the balls, or electrodes, of the spark gap the latter are alternately charged positively and negatively. The Radio Amateur's Hand Book The condenser used in the secondary coil circuit has 14 plates and this is equal to a capacitance of .0004 mfd. The Radio Amateur's Hand Book It has an input of 750 volts and the high voltage secondary coil which energizes the plate has an output of 450 watts and develops 1,500 to 3,000 volts. The Radio Amateur's Hand Book Finally connect the post of the secondary coil of the oscillation transformer to the ground and the clip of it to the wire leading to the aerial when you are ready to tune the set. The Radio Amateur's Hand Book The low voltage secondary coil which heats the filament develops 10.5 volts. The Radio Amateur's Hand Book To charge a condenser a spark coil or a transformer is used and the ends of the secondary coil, which delivers the high potential alternating current, are connected with the condenser. The Radio Amateur's Hand Book The inductance coils of the aerial wire system and those of the secondary coil circuit are practically alike. The Radio Amateur's Hand Book Now connect one end of the secondary coil to one post of a .001 mfd. variable condenser and the other end of the secondary to the other post of the condenser. The Radio Amateur's Hand Book The Secondary Spark Coil Circuit.—This includes the secondary coil and the spark gap which are connected together. The Radio Amateur's Hand Book Heating the Filament with Alternating Current.—Where an alternating current power transformer is used to develop the necessary plate voltage a second secondary coil is generally provided for heating the filament of the oscillation tube. The Radio Amateur's Hand Book The ends of the secondary coil lead to two binding posts, which are usually placed on top of the spark coil and it is to these that the spark gap is connected. The Radio Amateur's Hand Book The core, primary and secondary coils form a unit and these are set in a box or mounted on top of a hollow wooden base. The Radio Amateur's Hand Book When it is lowered the primary and secondary coils are in the same plane and when it is raised the coils set at an angle to each other. The Radio Amateur's Hand Book The secondary coil is wound on a cylinder that slides in and out of the primary coil. The Radio Amateur's Hand Book |
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