Electricity in common words by Harrington Avery D

Author:Harrington, Avery D. [from old catalog] & Wilson, J. Chester, [from old catalog] joint author
Language: eng
Format: epub
Tags: Electricity
Publisher: [Philadelphia, Press of Billstein & son]
Published: 1884-03-25T05:00:00+00:00

ELECTRICITY

He, also, discovered a means of combining circuits, constituting the important invention of receiving magnet, and the relay

ORIGINAL MORSE MACHINE.

or local battery, as they are now familiarly called. By this combination, a weak or exhausted current can call to its aid, or substitute for itself, a fresh and powerful one.

Morse's invention may be described as follows:

By means of a galvanic battery a current of electricity is sent over the wire which was by a system made and broken so as to move a pencil upon a moving- paper; the plan of his instrument was necessarily crude, a view of it being given on the opposite page.

He procured from a blacksmith a horse-shoe shaped piece of iron, around which he wound by hand some copper wire, which he had covered also by hand with cotton thread, thus making his magnet, which he fastened upon a large wooden frame and connected his line wires to it; his pencil holder, which also carried the armature which was moved by the electric action of the magnet, was probably two feet long, made of two wooden strips; the paper ribbon upon which the little characters were scratched was propelled by wooden clock works.

Evolution in this line has at this day produced a much more complete instrument for the telegraph. The view given on the next page shows the "Relay," " Sounder," and " Key" upon one base.

The first being connected to the line and the delicate instrument which receives the impulses from the line, and being a quiet instrument it is made to transfer the signals by the movements of its lever (" armature"; to a louder instrument—the sounder, which be-

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