File:"Roentgen" induction coils and other X-ray apparatus (1904) (14757362312).jpg

Identifier: roentgeninductio1904jame (find matches)
Title: "Roentgen" induction coils and other X-ray apparatus
Year: 1904 (1900s)
Authors: James G. Biddle Company
Subjects: X-rays Induction coils Radiography
Publisher: Philadelphia : James G. Biddle
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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below the Condenser Switch, and the Operating Switch is below the Pole-Changing Switch. Our set of instructions which accompany each coil describe indetail the function and method of operation of these switches. The coil is best operated on 20 voltsdirect current from battery or motor gener-ator; but we have had developed a special battery which in twocases of three cells each deliver 12 volts and is especially adaptedfor use in portable work. Also 110 volts can be used, if a controll-ing rheostat is provided. Each battery unit of three cells weighsLittle Battery , .. \ . , A . , ■ but 40 lbs., and is entirely portable in everyWeight. . ,. . ... . .. respect. It is seen that this battery is really light enough in weight to be strictly portable, and that itdoes not suffer from great weight as many of the so-called portablebatteries do. (See page 33). Price. B3040. 9 Type P Portable Coil $200.00 8 James G. Kiddle, 1114 Chestnut Street, Philadelphia. Mechanical Interrupter. (Patented).
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FlGUKb. y Roentgen Self-Starting MechanicalInterrupter. THE eminent satisfaction which our Mechanical Interrupterhas given to our patrons has arisen mainly from the fact thatit requires very little attention for its operation. A great objection to the old forms of mechanical interrupterswas that they required to be started vibrating by the operator. Hewas compelled to hit the armature to start it off. This is not necessary with our interrupter for it starts itself. This has been accomplished by makingthe magnetic circuit with a minimum amountof reluctance, and providing a properly shaped armature and polepiece. The magnetic circuit is completed from the armature to thebase of the magnet coil in a novel way through the interrupterspring itself. By this arrangement the only air gap in the path ofthe magnetic lines of force is that between the pole piece and thearmature itself, making the traffic force exerted on the armature amaximum for the magnetizing current employed. It Starts Itsel

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