File:Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to (14571211870).jpg

Identifier: radioforeverybod00lesc (find matches)
Title: Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art
Year: 1922 (1920s)
Authors: Lescarboura, Austin C. (Austin Celestin), 1891-
Subjects: Radio
Publisher: New York, Scientific American publishing company (etc.)
Contributing Library: Boston College Libraries
Digitizing Sponsor: Boston Library Consortium Member Libraries

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map to indicate thedirection from which the signals are coming. However,the loop indicates only the general line along which thesignals are being received, and there is no telling whetherthey come from one end of the loop or the other. How-ever, in most instances the operator knows whether it isin one direction or the other, and he only requires thedirective line. The radio compass generally consists of two or moreradio compass stations on shore, at the entrance to aharbor or some other point. A ship, wishing to knowits exact bearings, calls up the radio compass stations,and these stations, by orientating their loops, secure twodirective lines for the ship. Since the radio compass sta-tions are located a certain distance apart, forming the RADIO FOR EVERYBODY 253 base of an imaginary triangle, and since a pair of stationsobtain an angle reading formed by the direction of thereceived signals and <the base line, it is a simple matterwith a known base me and two angles to construct an
Text Appearing After Image:
The radio compass which is employed as an aid in navigation. A number of turns of wire are wound about the large wooden frame which is rotatably mounted in the stationary frame, so that it can be orientated. 254 RADIO FOR EVERYBODY imaginary triangle, the apex of which is the location of theship. The radio compass stations then call up the shipand give the navigator his exact position. During the war the radio compass was employed forlocating enemy radio transmitters. The Germans em-ployed the radio compass to guide their Zeppelins throughthe blackness of the night in their raids on London andParis. That is why the Zeppelin flew with such rareprecision over enemy territory and sea, and back to theirflying fields. More recent developments in the radio compass havebrought about a simpler method. Now the loop is carriedon the ship, and the operator obtains directionabreadingsfrom two shore stations whose locations are known, sothat with a given apex angle and a known base line, itbecomes

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