US319745A - Hbnei piepee - Google Patents

Description

(No Model.)

' H. PIEPER, FILS.

ELECTRIC ARG LAMP.

VUNITED STATES HENRI PIEPER, FILS,

PATENT OFFICE.

OF LIEGE, BELGIUM.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 319,745, dated June 9, 1885.

Application tiled May 8, 1885. (No model.) Patented in Belgium December 1, 1884, No. 67,060.

.To all whom, it may concern:

Beit known that I, HENRI PIEPER, Fils, a subject of the King of Belgium, and residing at Liege, in the Kingdom of Belgium, have invented a new Electric-Arc Lamp, (for which I have obtained Letters Patent in Belgium December 1, 1884, VNo. 67,060,) of which the Vfollowing is a specification.

My invention relates to electric-arc lamps; and 1t consists in a carbon-feeding device ysubstantially comprising two resilient frictric circuit.

able lengthwise.

tional pawls, actuated through the agency of the electric current, one of the said pawls operating to feed the movable carbon in themeasure required toward the stationary one, the other pawl serving to check and retain the movable carbon during the retrograde motion of the feeding-pawl, the carbon being thus continuously kept under control by the pawls and prevented, in case it is arranged vertically, from being acted upon by gravity independently of the pawls.

On the annexed sheet of drawings, Figure l is, a sectional elevation of the top part of an electric lamp to which my improved feed motion is applied. Fig. 2 shows the whole lamp in a section taken at a right angle to Fig. l, a portion of the same being broken away. Fig. 3 is a sectional plan on line l 2, Fig. l. Figs. 4 and 5 show two different modes of connecting the feeding device with the elec- Fig. 6 represents in principle the mechanical part of the device in different positions for the purpose of illustrating its operation.

I shall first proceed to describe the nature of the invention with reference to Fig. 6. In this figure, a represents the upper carbon of an electric lamp of vertical arrangement, the said carbon being suitably guided and movc is a lever pivoted at g. f and f are resilient arms xed to the lever c, and which press with their ends, provided, respectively, with the friction-blocks d and e, against the carbon. The parts c, f, f', d, and

' e are shown by full lines in their normal position. The said arms are attached to the lever e in such a manner that when the lever is lturned on its center in the direction of the arrow y the arm f will push the block d downward, while the arm f relieves the block e of pressure, and may eventually lift it off the carbon without materially moving it up or down. These effects may be attained by fixing the arm f to the lever at a point, g', being at a certain distance from the center g, and by making the arm f radial to the said center, as shown in the iignre. The strength of the armshas to be suitably regulated, and for lamps with vertical carbons it must be so determined that the friction between the said blocks, or either of them, and the carbon is suicient to prevent the latter from descending by gravity. Vhen under these conditions the lever c is depressed into the position shown by dotted lines, the pressure of the arm f and the block e on the carbon is reduced or taken off the same, whereas the arm f, in bending, slightly increases the pressure of the block d against the carbon, and simultaneously moves downward, together with the block d, so that on account of the friction between cl and a it will push downward the carbon, which is at the time unimpeded by the block e. The lever c being then returned to its normal position, the arm f presses the block @with increasing force against the carbon, while the arm f, in receding, draws'the block d with it in upward direction. During this part of its motion the block d, however, slides along the carbon without moving it, because the carbon is kept stationary by the block c. The arm f thus constitutes a frictional feed-pawl and the arm f a frictional retaining-pawl. The described device will operate in like manner in whichsoever position the carbons may be placed, whether horizontally, inclined, or even inverted.

For the purpose of actuating the mechanism it is combined with an electro-magnet connected with the circuit of the lamp. The coil ofthe said electro-magnet may either be placed in a shunt-circuit branching off from the main circuit, as shown by Fig. 4, or in the main circuit itself, as represented by Fig. 5. Thus in Fig. 4, in whicht is the end of the main conductor connected to the upper carbon,and u the end connected to the lower one, the shunt-current passes from a point of the conductor t to the tongue k, attached to but insulated from the lever c,- thence (provided the lever c be in raised or normal position) to the contact-knob Z, and from there through the windings of the coil fi to the conductor u. The lever e either forms or carries at its end the armature of the core h of the electro-magnet. The lever c is maintained in its normal position by the arms f and f; but a spring, p, provided with means for adjusting its tension, may be employed to draw down the lever against the force of the arm f, and another spring, acting in upward direction on the lever, may be added thereto, if considered advantageous. 'Iheparts being thus arranged,and the carbons at the proper distance from each other for the generation of the luminous arc, the current through the shunt-circuit will be too feeble to cause the feed apparatus to act; but when the distance between the carbons becomes too great the increase of resistance in the main circuit will causetheshuntcurrent to become stronger, so that the electro-magnet will then attract the lever c. The contact between 7c and Z being, however, broken by this motion of the lever, a series of vibrations of the latter will result in like manner as in electric alarms, the said Vibrations being transmitted to the arms f and f and the blocks eZ and e, as described with reference to Fig. 6. After the upper carbon has been advanced sufficiently, the resistance in the arc thereby diminished,

and consequently the strength of the shunt-A current reduced, the feeding device will stop again.

In the arrangement Fig. 5, it is the main current which passes through the coill t', a shuntconduit being, however, branched off from the wire connecting the carbon Z) with the coil c', and leading along the tongue 7c and through the contact-piece Z back to the main circuit. In this case the lever c will perma-` nently be held down by the magnetized core h so long as the portion of the main current passing through thecoilt' is strong enough; but when the main current becomes weaker, on account of the increase of resistance in the arc, the lever c will be detached from the core h by the force of the arm f, together with that of any spring introduced for the purpose. The contact between k and Z being thereby broken, the portion of the current which had so long passed through the shunt-connection will then be united with the portion continuously circulating in the coil z', so as to increase the power of the electro-magnet h, which will thereupon again attract the lever. In this manner, also, vibrations of the lever and itsv attachments are produced, which advance the' carbon.

In Figs. 1,2, and 3 the described feed apparatus is shown in combination with a lamp, an electro-magnet with two coils, ,placed in a shunt-circuit beingin this case employed.

The parts already described are indicated in these figures by the same letters as in Figs.l 4, 5, and 6. rlhe upper carbon, a, is in-` serted into a holder, c, sliding in a sleeve, a2. 0 is a spring attached to but insulated from the sleeve c2, and having a knob which presses through a hole in the sleeve a2 against the holder a', so as to be in permanent contact therewith. The blocks d and e also press against the holder a', and not against the carbon itself, as in Figs. 4 and 5. The lower carbon is placed in a holder, b', fixed to the movable core q of a solenoid, r, and having a' screw-threaded part, b2, working in the boss b3 of the frame of the lamp. The core is car ried by and free to turn on a center, g', arranged at the end of the movable pin s, which is supported by a spring acting against a collar thereof. By means of this arrangement the lower carbon, being in contact with the upper one,is drawn down and slightly rotated when a current is sent through the lamp to light the same, the rotation of the carbon being of advantage in developing the luminous arc. This portion of the lamp, however, does not form a part of my present patent application. The electric main current passes from the wire t and the bindingscrew m, through plate o, sleeve c2, and holder c', to the upper carbon, a, thence through the lower carbon, b, holder b', core q, pin s, sleeve s', connecting-wire s2, coil r, wire 1", and binding-screw a, to the wire u. The shunt-current, which is branched off from the main current by means of the contact-spring o, passes from there through wire o', the coils t', wire c, tongue 7c, adjustable screw Z, wire Z', and binding-screw a, back to the main circuit. The action of these currents on the feed mechanism is precisely the same as that set forth with reference to Fig. 4.

By means of the described feed apparatus a very steady light is obtained even with lamps of small power.

I claim as my inventionl. In an electric-arc lamp, the combination, with the movable carbon, of two resili ent frictional pawls, to which an alternating motion is imparted by the intermittent action of an electro-magnet connected with the cir- IOO IIO

cuit of the lamp, one of the said pawls operating by longitudinal motion to feed the movable carbon forward, the other one acting by transverse oscillations to alternately release and hold the same, substantially as hereinbcfore described.

2. In an electric-arc lamp, the combination, with the movable carbon-holder ct/ and an electro-magnetconnected with the circuit of the lamp, of a lever, c, arranged to be vibrated by the electro-magnet, and carrying two resilient frictional pawls bearing against the said holder,the pawls being so attached to the lever c that when this lever is vibrated the pawl f will advance the carbon, while the pawl f will alternately release and hold the same, substantially as and for the purpose specified. Y

3. In an electric-arc lamp, the combina` tion, with the movable carbon-holder a and an electro-magnet connected with the circuit of the lamp, of a lever, c, arranged to be vibrated by the electro-magnet, and carrying In testimonywhereof Ihave signedmyname two resilient frictional pawls, f and f bearto this speccation in the presence of two subing against the said holder, the pawl f branchscribing witnesses.

ing off from the lever at a certain distance HENRI PIEPER, FILS. 5 from its fulorum, the pawl fradiating from Witnesses: the fulcrum, substantially as and for the pur- HENRY SPRINGMANN,

pose hereinbefore set forth. B. ROI.

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