Induction Coils; A Practical Manual for Amateur Coil-Makers

Induction Coils; A Practical Manual for Amateur Coil-Makers

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...both sliding rods, and can be nicely regulated by the adjusting screws at the sides of the instrument. current at the electrodes decreased, according to the length of the column of water through which the current has to pass." This instrument is simply placed in circuit by connecting the wires from battery and coil to the binding screws on the base of the instrument. In this form a double set of binding screws are provided to admit of the current being divided between the electrodes and the column of water, if so desired. At Fig. 50 is shown a form made and sold by Messrs. King, Mendham & Co., Narrow Wine Street, Bristol. In this form the distance between the two terminals is regulated by means of a screw, and thus a great nicety of regulation is secured. At Fig. 52 is shown a liquid rheostat, supplied by When a coil is used for physiological experiments, and accurate measurements of the resistance are desired, it is necessary to employ rheostats of high accuracy in connection with delicate measuring instruments and a Wheatstone bridge for nicely adjusting and balancing the resistance. Such an arrangement is shown at Figs. 53 and 54, in an instrument supplied by Mr. K. Schall. Reference to Fig. 53 will show how this arrangement may be used with a telephone. In this diagram, letters A and B show the position of the battery binding posts; C, the coil; D and E, the binding posts for the conductors to the circuit being measured, as represented by R; F, the binding post to which the bridge resistance, the plug resistances, and one of the galvanometer circuit wires are connected; G, the galvanometer; I, the movable pointer of the bridge; and T, the telephone. The dotted line from a to a1 shows the sweep of the switch arm, and S more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • United States
  • English
  • black & white illustrations
  • 1236823397
  • 9781236823397