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American X-ray journal (1897) (14753741291)
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Summary
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
Text Appearing Before Image:
the binding posts, shown atthe right, are connected to the batteriesor lighting circuit, and the other two tothe induction coil. The vibrator is op-erated by means of a small coil (shownat the back of the box) which is a shunt 71 THE AMERICAN X-RAY JOURNAL. from the main circuit. An independentset of contacts makes and breaks thecircuit through this coil (they are shownin the front of the main contacts), andthe switch near the binding post opensand closes the shunt circuit. The maincircuit is controlled by the reversingswitch, shown at the left. The vibrator, which is a very muchimproved form, is shown more in detail arrangement is the suddenness of thebreak, which is accomplished by thecollar in the vibrator spring striking themoveable contact while at full speed. Inthe old forms of interrupters, the breakwas made when the vibrator started tomove, consequently it was not onlymuch slower, but did not make use ofthe momentum of the iron head of thevibrator. Sometimes the welding action
Text Appearing After Image:
FIG. in Fig. 3. The moveable platinum con-tact is carried on a small vertical springbehind the vibrator spring. When thecontact is made the movement of thevibrator is not arrested, as in other formsbut continues to its fall amplitude, thusallowing a long make. The lengthof the make can be varied by screw-ing in or out the other platinum contact.The most important advantage of this of the current joined the two pieces ofplatinum so tightly that the magneticpull was not sufficient to separate them.In the new form, as the break is madewhen the vibrator is at the middle of itsswing, the sudden blow with the entiremomentum of the vibrator head is al -wa3rs sufficient to break the platinumsapart, and once started, the vibratorcontinues in motion until the current is THE AMIiRICA.X A-A. I ) JOlIfX. I /.. 75 turned off. The suddenness of the with an adjustable condenser, and in-break makes it possible to use this form dependent vibrator mounted on the same
The American X-Ray Journal was the first radiology journal in the United States. Its first issue was published in May 1897, its founder and first editor was an American physician Heber Robarts (1852–1922), who took an early keen interest in the new Roentgen rays. Robarts was also a co-founder of the Roentgen Society of the United States, the forerunner of the American Roentgen Ray Society (ARRS). In its earliest days the journal struggled to attract any important articles as the majority of the pioneering researchers in the fledgling field of x-rays would prefer to see their work published in the established medical journals. The initial subscription rate for the new journal was one dollar per annum (payable in advance) or two dollars for overseas subscribers. Alternatively, it was ten cents per issue, or twenty cents for readers outside the US. In 1902, Harry Preston Pratt, an American physician from Chicago with an interest in electrotherapy, purchased the American X-Ray Journal from Dr Robarts. In 1904, the American X-Ray Journal subsumed the Archives of Electrology and Radiology (which had previously been the American Electro-Therapeutic and X-Ray Era). Following this, the journal was re-named and re-focussed as the American Journal of Progressive Therapeutics, and this published its last edition in January 1906.