Description of an electrical machine of a new form, constructed with regard to the principles of electrical laws / by P.H. Vander Weyde.

  • Van der Weyde, P. H. (Peter Henri), 1813-1895.
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: Description of an electrical machine of a new form, constructed with regard to the principles of electrical laws / by P.H. Vander Weyde. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    ing substance, which substance communicates to the metallic collector and the spark producer ; the only parts exposed. In this way almost the whole machine may 1 e constructed out of vulcanized india rubber ; this substance becoming by fric- tion much stronger electric than the best kind of glass, is better for the exciting disk ; besides this, it is by its resi- nous nature not so subject to attract moisture from the atmosphere, and works under many circumstances when common glass machines do not give a trace of electric- ity^*) For the same reason it is also better than glass for isolating supports, so that in my machine the annular prime c< n- ductor and its isolating support are made of one Bhigle piece of vulcanized india rubber, only the support being solid and the (*) This is most strikingly illustrate J by the Electric Syrir.ge, invented in Geranny, and improved some 10 yea s ago by Dr. Kif.sz in Bei in. o igin il- ly it consists 1 of a glass tube, in which a piston developed E ect ici y by fric- tion; it is described in Zimmerman's Xaturkrafte, Berlin, 18.J6, Vol , 1, p. 54. The Author of this Pamphlet use I. a Gutt i Pei ch i, and later a Vulcanize i India Rubber Tube, instead of the Glass Tube, and a ft w of the Stu L< nts of his Cass in the Coope;- Institute con- u :h Sy inges, in I860, m h v, ied suc- cess. The best arrangement is represente I in rig. .J, which is sino.] ly made of a common large India Rubber Syringe, about -; or 10 inches long The Tube, ABCD, is perfectly cylin Irical and po ishe I insi Le ; a i iston of leathei E, con- nected by a brass rod, Hk, to a han lie, kL, may be move I by means ot said handle, developing — Elec ricity in the cy in ler, and the opposi e kind (-f- Electricity,) in the piston; that of the pis on may I - big the end of the brass rod in k, an 1 th it of th i inside of the cy inter is i the points in F, communicating by the brass rod EG wi h the brass ball <J, and prevented from being lost in the piston by the piece EF, made of India Rubber, or some o her isolating substance. By moving the piston from B to A, and in the sirae lime touching k, the - - Electricity of the inside of the tube will be collected in G, and