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3 definitions found
 for Ruhmkorff''s coil
From The Collaborative International Dictionary of English v.0.48 :

  Induction \In*duc"tion\, n. [L. inductio: cf. F. induction. See
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     1. The act or process of inducting or bringing in;
        introduction; entrance; beginning; commencement.
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              I know not you; nor am I well pleased to make this
              time, as the affair now stands, the induction of
              your acquaintance.                    --Beau. & Fl.
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              These promises are fair, the parties sure,
              And our induction dull of prosperous hope. --Shak.
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     2. An introduction or introductory scene, as to a play; a
        preface; a prologue. [Obs.]
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              This is but an induction: I will draw
              The curtains of the tragedy hereafter. --Massinger.
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     3. (Philos.) The act or process of reasoning from a part to a
        whole, from particulars to generals, or from the
        individual to the universal; also, the result or inference
        so reached.
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              Induction is an inference drawn from all the
              particulars.                          --Sir W.
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              Induction is the process by which we conclude that
              what is true of certain individuals of a class, is
              true of the whole class, or that what is true at
              certain times will be true in similar circumstances
              at all times.                         --J. S. Mill.
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     4. The introduction of a clergyman into a benefice, or of an
        official into a office, with appropriate acts or
        ceremonies; the giving actual possession of an
        ecclesiastical living or its temporalities.
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     5. (Math.) A process of demonstration in which a general
        truth is gathered from an examination of particular cases,
        one of which is known to be true, the examination being so
        conducted that each case is made to depend on the
        preceding one; -- called also successive induction.
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     6. (Physics) The property by which one body, having
        electrical or magnetic polarity, causes or induces it in
        another body without direct contact; an impress of
        electrical or magnetic force or condition from one body on
        another without actual contact.
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     Electro-dynamic induction, the action by which a variable
        or interrupted current of electricity excites another
        current in a neighboring conductor forming a closed
     Electro-magnetic induction, the influence by which an
        electric current produces magnetic polarity in certain
        bodies near or around which it passes.
     Electro-static induction, the action by which a body
        possessing a charge of statical electricity develops a
        charge of statical electricity of the opposite character
        in a neighboring body.
     Induction coil, an apparatus producing induced currents of
        great intensity. It consists of a coil or helix of stout
        insulated copper wire, surrounded by another coil of very
        fine insulated wire, in which a momentary current is
        induced, when a current (as from a voltaic battery),
        passing through the inner coil, is made, broken, or
        varied. The inner coil has within it a core of soft iron,
        and is connected at its terminals with a condenser; --
        called also inductorium, and Ruhmkorff's coil.
     Induction pipe, Induction port, or Induction valve, a
        pipe, passageway, or valve, for leading or admitting a
        fluid to a receiver, as steam to an engine cylinder, or
        water to a pump.
     Magnetic induction, the action by which magnetic polarity
        is developed in a body susceptible to magnetic effects
        when brought under the influence of a magnet.
     Magneto-electric induction, the influence by which a magnet
        excites electric currents in closed circuits.
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     Logical induction, (Philos.), an act or method of reasoning
        from all the parts separately to the whole which they
        constitute, or into which they may be united collectively;
        the operation of discovering and proving general
        propositions; the scientific method.
     Philosophical induction, the inference, or the act of
        inferring, that what has been observed or established in
        respect to a part, individual, or species, may, on the
        ground of analogy, be affirmed or received of the whole to
        which it belongs. This last is the inductive method of
        Bacon. It ascends from the parts to the whole, and forms,
        from the general analogy of nature, or special
        presumptions in the case, conclusions which have greater
        or less degrees of force, and which may be strengthened or
        weakened by subsequent experience and experiment. It
        relates to actual existences, as in physical science or
        the concerns of life. Logical induction is founded on the
        necessary laws of thought; philosophical induction, on the
        interpretation of the indications or analogy of nature.
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     Syn: Deduction.
     Usage: Induction, Deduction. In induction we observe a
            sufficient number of individual facts, and, on the
            ground of analogy, extend what is true of them to
            others of the same class, thus arriving at general
            principles or laws. This is the kind of reasoning in
            physical science. In deduction we begin with a general
            truth, which is already proven or provisionally
            assumed, and seek to connect it with some particular
            case by means of a middle term, or class of objects,
            known to be equally connected with both. Thus, we
            bring down the general into the particular, affirming
            of the latter the distinctive qualities of the former.
            This is the syllogistic method. By induction Franklin
            established the identity of lightning and electricity;
            by deduction he inferred that dwellings might be
            protected by lightning rods.
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From The Collaborative International Dictionary of English v.0.48 :

  Ruhmkorff's coil \Ruhm"korff's coil`\ [So called from its
     inventor, Ruhmkorff, a german physicist.] (Elec.)
     See Induction coil, under Induction.
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From The Collaborative International Dictionary of English v.0.48 :

  Coil \Coil\, n.
     1. A ring, series of rings, or spiral, into which a rope, or
        other like thing, is wound.
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              The wild grapevines that twisted their coils from
              trec to tree.                         --W. Irving.
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     2. Fig.: Entanglement; toil; mesh; perplexity.
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     3. A series of connected pipes in rows or layers, as in a
        steam heating apparatus.
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     Induction coil. (Elec.) See under Induction.
     Ruhmkorff's coil (Elec.), an induction coil, sometimes so
        called from Ruhmkorff, a prominent manufacturer of the
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