Some cool electrical discharge wire cutting photos:
Image from web page 158 of “Workout routines in sensible physiology” (1897)
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Identifier: exercisesinpract00wall
Title: Workout routines in sensible physiology
Year: 1897 (1890s)
Authors: Waller, Augustus Désiré, 1856-1922
Subjects: Physiology Biochemistry
Publisher: London New York, N.Y. Bombay : Longmans, Green, and Co.
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Information Commons
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Fig. 27. and zinc of a Daniell cell, and discharged when connected bya sufficient conductor. Either the charge or the dischargemay be produced by way of a nerve. Connect the middle pair of pools of a commutator withoutcross wires to the terminals of a condenser, connect thetwo lateral pairs with a cell and with the nerve of a nerve-muscle preparation as m fig. 27. With the cradle of the commutator as shown in thediagram, the condenser is connected with the cell andcharged. When the cradle is turned more than, the chargedcondenser is disconnected from the cell and connected withthe nerve via which it is discharged, provoking asingle twitch of the attached muscle. IN THE PHYSIOLOGY OF THE NERVOUS Method. 29 Minimum energy of stimulus. Dem. With stimulation by the discharge (or charge) of a con-denser we can express in terms of power the worth of theelectrical stimulus. JV^0T3P. kcv
Text Appearing Right after Image:
Fig. 28. Charge from + by means of b ce ejp pto — when get in touch with is produced at 6 by depres-sing the Morse essential (and broken at a) viz., ascending in the nerve. Discharge from p through e ec a to p when make contact with is produced at a by recoil ofthe Morse crucial (and broken at b) viz., descending in the nerve. The bridging crucial is for the purpose of cutting out from the nerve either thecharge or the discharge. If desired this could be effected with out the bridgingkey by the circuits 1 and two of fig. 29, substituting the thrilling electrodes e e forthe galvonometer SN. Put up connections in accordance with fig. 28, employing acondenser of 010 microfarad, subdivided into components = 001. Figure out by adjustment of the rheostats r, E, the smallestfraction of a volt that will excite the nerve of a nerve-musclepreparation : — (A) with the condenser at OlO microfarad (B) with the condenser at *01 microfarad and calculate in the two instances the quantity and the energy ofsuch a minimal electrical stimulus. (C) with a conveni
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Image from web page 847 of “Modern day mechanism, exhibiting the latest progress in machines, motors, and the transmission of energy, being a supplementary volume to Appletons’ cyclopaedia of applied mechanics” (1892)
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Identifier: modernmechanisme00benj
Title: Modern day mechanism, exhibiting the most recent progress in machines, motors, and the transmission of energy, getting a supplementary volume to Appletons’ cyclopaedia of applied mechanics
Year: 1892 (1890s)
Authors: Benjamin, Park, 1849-1922
Subjects: Mechanical engineering
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University
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d stroke, it is apparent that if the feed wheel is run down against it in the positionshown in the engraving, the pusher will be provided its full traverse and the greatest feed. Ifrun back to clear the travel of the agitator, the pusher will, of course, have no motion and thefeed will stop. Amongst these extremes any preferred rate of feed can be offered. In like manner, the rock of the grate bars can be adjusted amongst any limiting angles,and over a variety of motion from no movement to complete throw, by means of the sheath nut andjam nuts on the connecting rod. By these adjustments the whole action of the stoker iscontrolled, and the fires forced, checked, or banked at will. Stone Breaker : see Ore-crushing Machines. ST0R.4.(tE batteries. The storage, secondary or reversible battery, and accumu-lator are diverse terms applied to a kind of cell primarily based on the principle demonstrated byFaraday in 1834, that chemical and electrical energy had been mutually convertible. In 1859, 816 STORAGE BATTERIES.
Text Appearing Right after Image:
after experiments with a variety of metals, Plante decided upon the use of lead plates in dilutesulphuric acid, since in discharge each plates have been active that is, not only did the per-oxide of lead plate combine witli hydrogen, but the lowered metallic lead combined withoxygen. Plauies cell was initially constructed with two plates of sheet lead, separated bygutta-percha strips, one sheet bcinglaid more than the other, with two gutta-percha strips betweenthem, and two far more laid on the upper sheet, as shown at A, Fig. 1. They were then rolled with each other and clamped, as shown at B, a strip of leail becoming left attached to the corner of each sheet in cutting, bywhich connection could i)e made. The sheets thusrolled togetlier had been ])hiced in a jar of glass or ebonite,containing a ten per cent, remedy of sulphuric acid.The jar had an ebonite cover, with binding screws towhich the connecting strips had been attached alsoclamps for holding wires to show the heating effectof the discharge. The electr
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