File:American X-ray journal (1897) (14756593062).jpg

Identifier: americanxrayjour1418unse (find matches)
Title: American X-ray journal
Year: 1899 (1890s)
Authors:
Subjects: X-Rays Radiography
Publisher: St. Louis : American X-Ray Publishing Co.
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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e willcause its armature to rotate; it is thencapable of performing mechanical work, THE AMERICA* X-RA Y JOURNAL. 46i e. g., turning the revolving plates of astatic machine, and is cilleJ a motor. When a motor or secondary dynamohas wires attached to the brushes and acurrent is thereby shunted off from thearmature to be employed for variouspurposes, it is called a dynamotor.THE DYNAMOTOR AND ITS MODIFICATK MS. The dynamotor or rotary transformermay have one portion of its armaturecoils terminate in a commutator, onone side, as usual, and a second set of ical batteries formerly used at the cen-tral stations. It is in this mannerthat not only the short lines in thecity of Buffalo are excited but the longdistance wires between this place andChicago, New York City, Boston, Phil-adelphia, Toronto and other remote andintermediate places receive their electri-cal supply, indirectly from the dynamosof the great Ellicott Square Building,the down-town home of the Buffalo Elec-trical Sanitarium.
Text Appearing After Image:
Electrically Driven Telegraph Plant FIG. 3 20 Dynamotors. Western Union Telegraph Co., Huflalo, N.Y. larger wires terminate in a second com-mutator on the other, in order to deliv-er two currents of different strengthfrom the same instrument, or, instead ofthe second commutator two collectingrings may receive the ends of the coilsof wire of opposite phase, giving rise tothe alternating or sinusodial current.The former variety of dynamotor is em-ployed in the telegraph, the latter in thetelephone service, where they have en-tirely replaced the great number of chem- Through the intervention of the dyna-motor the direct current may be trans-formed into the alternating or vice ver-sa, (see cut No. 1.) a direct current ofhigh potential and little quantity intoone of low potential and greater quanti-ty, (Fig. No. 2.) or any other combina-tion desired by the operator, the num-ber of watts or total electrical energy be-ing always nearly the same, a little en-ergy is necessarily lost during th

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