Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . REVOLVING COIL AND MAGNET. 123. this instance the magnets rotate also. For this pur-pose, they are made of thin steel, and bent into a semi-2? 73. circular form. The two are connected by stripsof brass, so as to form acircle, the similar polesbeing near each other,as indicated by the let-ters in the cut. Thiscircle is a little largerthan the coil, and re-volves freely round iton a vertical axis. Apeculiar arrangement isrequired, in order totransmi
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . REVOLVING COIL AND MAGNET. 123. this instance the magnets rotate also. For this pur-pose, they are made of thin steel, and bent into a semi-2? 73. circular form. The two are connected by stripsof brass, so as to form acircle, the similar polesbeing near each other,as indicated by the let-ters in the cut. Thiscircle is a little largerthan the coil, and re-volves freely round iton a vertical axis. Apeculiar arrangement isrequired, in order totransmit the battery current to the pole-changer be-longing to the coil. The springs which press uponit are connected with two small cylinders of silver,surrounding the shaft of the magnet and insulatedfrom it, one being a little below the other; or thecylindrical shaft itself may answer for one of wires proceeding from the screw-cups on thestand press upon these cylinders. In this mannerthe current is conveyed to the springs bearing uponthe pole-changer in a constant direction, notwith-standing that they are carried round with the magnetin its revolutions. When conne
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
