A handful of nice electrical discharge wire cutting pictures I located:
Image from page 78 of “The Röntgen rays in medical work” (1907)
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Identifier: rntgenraysinmedi1907wals
Title: The Röntgen rays in medical operate
Year: 1907 (1900s)
Authors: Walsh, David
Subjects: X-rays Radiography X-Rays Radiography
Publisher: New York : William Wood
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Information Commons and Harvard Medical School
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charge from the mains with a lamp in series, the batterymust be connected so that the present which goes through it mustalso go via the lamp. In the case of a lamp suspended by aflexible wire the circumstances would be met by cutting a single of the twostrands of the double wire, and untwisting the cut ends for a fewinches, so as to give sufficient length for connection to the two ends THE ELECTRICAL APPARATUS 57 of the battery. As a single of the severed ends is optimistic and theother is adverse, there will be a correct and a wrong way of con-necting up. In the former the path of the present from themain will be opposed to that of the battery, the lamp will burnmore dimly, and the battery will obtain a charge. In the latter itwill not acquire a charge, but, on the contrary, it will discharge,reinforcing the existing of the primary, and the lamp in the circuit willburn too brightly. The effect on the lamp is the simplest guide tothe appropriate way of connecting in the battery, and when once deter-
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Fig. 31.—Charging by way of a Lamp-Resistance (Biggs and Co.). mined the ends could be marked in some way for future guidance.Another way of testing the polarity of the ends of wire is to uselitmus-paper the paper will be reddened exactly where it touches thepositive pole, and turn blue exactly where it touches the adverse. If, rather of contemplating a flexible wire divided as just described,we think about a piece of electric light wiring enclosed in the ordinarywood casing, it will be observed that the very same results can be obtainedby removing a couple of inches of the casing cover a single of the two wirescan then be cut, and the ends bent up a couple of inches apart, and 58 THE RONTGEN RA YS IN Health-related Function brought by way of holes in the cover, exactly where they could be attachedto binding screws for the sake of neatness. The battery can thenbe attached to these binding screws by signifies of wires when it iswished to charge, and when charging is not in progress the batterycan be detached and removed, and the binding screws directlycon
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Image from web page 239 of “Electric railway gazette” (1895)
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Identifier: electricrailwayg10newy
Title: Electric railway gazette
Year: 1895 (1890s)
Authors:
Subjects: Electric railroads
Publisher: New York : [W.J. Johnston Co.]
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mproperprocedure asserting that the proposed consolida-tion never ever came just before any stockholders meetingot cither the Kansas City or Grand Avenue Cable BATffilFICATIONS IN A LIGHTNING DIS-CHARGE. In the course of his paper on lightning ar-resters prior to a current meeting of the AmericanInstitute of Electrical Engineers, Alexander JayWurts presented a photograph of a lightning dis-charge showing ramifications wandering off fromthe main path, as he stated, in a seemingly aimlessmanner. Mr. Wurts remarked that he was in-clined to think that at instances the ramificationsfrom the principal discharge found their way intoelectrical circuits. The figure illustrates a curi-ous frealc which is attributed to this cause. Inthe cut, T represents an overhead trolley wire,on either side of which are wooden poles H is a,bell-shaped insulator produced of compressed micaand shellac. These insulators very easily withstand anelectric strain of 13,000 volts M is an iron ringholding the span wire to the pole 75 is a branch
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CURIOUS FREAK OF LIGHTNING. circuit feeding present to a group of lamps 17,and £ is a lightning arrester in its discharge cir-cuit g- is a group of lamps. The distance be-tween i/and B is about 50 feet. Soon after a violentthunder storm it was noticed that 1 of thesepoles had been shattered from the top down tothe iron ring, the remaining portion becoming unin-jured. This had baen carried out by lightning, and inthe opinion of the writer, by one particular of the ramifi-cations to which allusion has already been made.In any case, this discharge, what ever it may possibly havebeen, passed over the span wire to the bell insula-tor //, piercing it and breaking it into threepieces, then traveled along the trolley wire to B,exactly where it apparently divided, one part passing tothe group of lights </, breaking them all, ten innumber, and the other part to earth through thearrester L, without ia any way interfering withthe group ot lights ./. It is very exceptional tonote that none of the pirts broken by this dis-charge show
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