Specifications and Drawings of Patents Relating to Electricity Issued by the U. S. Volume 22 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: ...base plate of the lamp, directly under the brake-wheel, is fixed a pin, 2, in such a position that a corresponding pin, 1, on the friction-band i2 will meet the same 15 when the lamp is in operation, thereby pre. venting the friction-band revolving too far, as it necessarily would in the absence of such an arrangement. As before stated, the shunt-resistance is 20 brought into operation when either of the electrodes are thrown out of circuit. Its action is as follows: When an electrode is put out of circuit, magnet a', which is a continnous part of the conductor leading to the positive elec 25 trode, loses its power altogether. The sliding core b then leaves its socket in magnet a' and ascends to the limit of its distance into that of magnet a2, (it will be remembered that the latter magnet, being in a derived circuit, is not 30 affected by either of the electrodes being pnt out of circuit, ) for the reasons already stated. The contact-weight ra, in conseqnence of the ascent of sliding core b to the limit of its distance, then falls upon the spring n, and at the 35 same time makes connection with one end of the shunt-resistance 0 at o'. On referring to the drawings it will be seen that spring n is connected with the positive pole of the lamp. Now, if a current of electricity passes along 40 this spring, which is touched by contact-weight --, it passesin at the positive end of the shuntresistance, and the other end being connected with the negative pole of the lamp, the circuit is complete, and the other lamps in the same 45 series remain unaffected. The contact-weight must of course be insulated from the metallic lever-extension e', to which it is secured. When the electrodes are again brought together, magnet a' is once more energized and the arc ree...