. The Ontario high school physics. mpleted andbroken quickly by the operator, the two clicks are veryclose together, and a dot is formed; but if an intervalintervenes between the clicks the effect is called a combinations of dots and dashes form differentletters. The transmitting operator at A is thus able to makehimself understood by the receiving operator at B or G. 512. The Electric Bell. Electric bells are of various 52 L shows the construction of one ofthe most common forms. It consists of anelectromagnet M,M,E, in fi-ont of the polesof which is supported an arma
. The Ontario high school physics. mpleted andbroken quickly by the operator, the two clicks are veryclose together, and a dot is formed; but if an intervalintervenes between the clicks the effect is called a combinations of dots and dashes form differentletters. The transmitting operator at A is thus able to makehimself understood by the receiving operator at B or G. 512. The Electric Bell. Electric bells are of various 52 L shows the construction of one ofthe most common forms. It consists of anelectromagnet M,M,E, in fi-ont of the polesof which is supported an armature A bya spring >S^. At the end of the armatureis attached a hammer H, placed in such aposition that it will strike a bell B whenthe armature is drawn to the poles ofthe magnet. A current breaker, consistingof a platinum-tipped spring D, attached to thearmature, is placed in the circuit as shown in thefigure. When tlie circuit is completed by a push-button P, the current from the battery passesfrom the screw G to spring D and. Fio. 521.—Electric bell and its G is shown a section of the push-button. The figure shows the bell whenthe button is not pressed. The currentmay pass in either direction through thebell.
Size: 1187px × 2105px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
