Patent GB-190223606-A (GB)
Title: Improvements in Electric Arc Lamps.
Inventor: HOEGNER PAUL
Filed: 1902-10-29
Granted: 1903-05-28
Abstract: 23,606. H÷gner, P. Oct. 29. Arc lamps.-Two inclined carbons are fed alike to an arc by weight or a spring, under control of an escapement and electromagnets, or by an electric motor, the supply of current to which is controlled by an electromagnetic switch. The arc is struck by lateral movement of one or both carbons, effected by the feed-controlling electromagnets, the arrangement of parts being such that this lateral movement does not move the carbons lengthwise. Special means for making electric connection with the carbons are described. Several arrangements are specified. In that shown in Fig. 5, the carbons slide in tubes b, b<1>, pivoted to a plate w, and linked at q to a movable core, which is supported over a shunt solenoid g by a spring z, the solenoid acting to place the points of the carbons in contact, whereupon the spring strikes the arc. The carbons are fed downwards by weighted holders in the tubes b, b<1>, the feed being controlled by cords connecting the holders to drums m, which are geared to an escapement wheel i ; this is stopped by a projection t on the tubes b<1>, except when the lower ends of the tubes move near together. In modifications of this arrangement the arc may be struck by linking one tube to a swinging armature, such as that shown at k, Fig. 7, situated between series and shunt electromagnets h, g. The tubes b, b<1>, Fig. 5, may be carried by shoulders sliding laterally on the plate w, instead of being pivoted. The carbons may be carried by holders fixed on racks, which gear with the wheels m ; one of the racks slides in a guide pivoted on the plate w and acted on by the arc-striking gear. This guide also carries the stop t. One tube b may be pivoted on the axle of one wheel m, and carry the escapement wheel i, the stop t being fixed on the plate w. The lamp may be inverted, the wheels m being driven by a cord and weight, to raise the carbons to the arc. Fig. 7 shows an electromotor lamp. The carbons a, a' slide in guides, one of which is pivoted and is linked to the swinging armature k of electromagnets h, g. The carbons are held up by frictionwheels x, which are connected by worm gearing to a ratchet-wheel, to be driven by the vibrating armature of an electromagnet, when current is supplied to this by contact of a part e of the pivoted carbon guide with a stationery contact. In a modification of this, the electric motor is replaced by a sliding rack, which is acted on by a driving-spring, the feed movement thus produced being controlled by an escapement-wheel and a stop movable by a shunt electromagnet. In another arrangement, Fig. 10, the carbons are supported at their upper ends by guides 8 and a cross-bar 6, and they pass through a guide 9. The arc is struck by vertical movement of the guide 9, effected by linkage 1 to the armature lever k of series and shunt electromagnets h, g. The crossbar 6 is connected by a cord and gearing m to an escapement-wheel i, the movable stop t of which is linked to the armature lever k. In a modification of this lamp. the cross-bar 6 is in engagement with a vertical screw, which is rotated by an electric motor, such as that described in connection with Fig. 7, to feed the carbons. Instead of the vertically-movable guide 9, the carbons may pass through a stationary plate, near their points, one carbon being movable laterally by a sliding or pivoted guide, which is linked to a pivoted frame carrying escapement gear similar to that described in connection with Fig. 5. This frame may be pivoted in line with-the place where the vertical cord supporting the cross-bar 6, Fig. 10, leaves the pulley m. Electric connections with the carbons may be made near the arc through the carbon guides in the construction shown in Fig. 7. In constructions such as that shown in Fig. 10, the guide-plate 9 carries special contact devices, such as yokes surrounding the carbons except where they carry weighted levers, which bear against the carbons ; or the carbon may pass through holes in a number of contact-discs, which are piled upon the inclined base of a containing-box.