Improvements in and connected with Electric Arc Lamps

• Main Author: OTTO GROSS
• Format: Patent
• Language: English
• Published: 10.08.1905

21,242. Gross, O. Oct. 4. Arc lamps.- Downwardly - convergent electrodes are engaged by clutches of cam or wedge types to regulate the feed. The arc is struck by means of an arcing-plate which may be movable or, according to the Provisional Specification, fixed. Magazines for supplying fresh carbons may be provided. In one form, the core h, Fig. 1, of a differentially-wound solenoid S, S is connected to the piston h of a dashpot and to a crosshead g. The crosshead may carry forked pieces g embracing the fixed tubes a, b in which the carbons slide, and is connected by a pair of links f to each clutch. Rollers d, each having a pair of milled bevelled surfaces to engage the carbon, are pivoted eccentrically to the links f and to clip or other bracket on a tube a which telescopes within the tube a. The base - plate, or a stop, serves to arrest the tube a and to disengage the rollers from the carbon when feeding is necessary. In another form of clutch, a gripping block 11, Fig. 6, is pivoted to arms 13 on a clip or bracket 9, and the link f is connected either to the block or to an extension of one of the arms beyond its pivot. The arcing-plate A, Fig. 1, is carried by an arm on a vertical shaft q. A second arm p on the shaft has a pin connected by a swivel o to a bell-crank lever m, actuated by a link l and adjustable tie k attached to the crosshead g. When the clutches are disengaged from the carbons, the arcing-plate is immediately beneath the latter. In another form of lamp, the cores of series and shunt solenoids are linked to a rocking beam and connected respectively to a dash-pot and to a horizontal bar attached to the crosshead g. In this case, the arcing-plate is preferably moved about a horizontal axis, being attached to one end of an arm, which rests on a pin and is pivoted at the other end to a rod depending from the horizontal bar. A series electromagnet j, Fig. 1, steadies the arc. A magazine for the carbons is shown in Fig. 10. A sloping bottom 18 and a stepped top 17 allow the carbons, which are introduced through a door 19, to feed without jamming. The feeding-mechanisms described may be employed with lamps having three or more carbons.