US745427A - Electric-arc lamp. - Google Patents

Description

PATENTED DEC. 1, 1903;

H. EMONDS.

ELECTRIC ARC LAMP.

APPLICATION FILED MAY 14, 1903.

N0 MODEL.

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iri'o, 745,427. Patented December 1, 1903.

UNITED STATES PATENT OFFICE.

HUBERT EMONDS, OF AIX-LA-CI-IAPELLE, GERMANY, ASSIGNOR TO BRUSSEL- AACIIENER GLAS-MANUFAOTUR LEYMANNS & KEIM, OF AIX-LA-OIIA- PELLE, GERMANY.

ELECTRIC-ARC LAM Pu SPECIFICATION forming part of Letters Patent No. 745,427, dated December 1, 1903.

Application filed May 14, 1903. SerialNo. 157,062. (No model) To aZZ 1071,0717, it mwy ooncern: glass casing surrounding the carbons. To

Be it known that I, I-IUBERT EMONDS, elecavoid all these drawbacks, the following contrician, asubject of the King of Prussia, Emstruction is made use of. peror of Germany, residing at 48 Lothringer- An electromagnetic coil a is connected with 5 strasse, Aix-la-Chapelle, in the Kingdom of the tube Z), carrying on its lower end a disk 0, Prussia, Empire of Germany, have invented by whose annular double flange (1 is held the certain new and useful Improvements in Arcopen end of the glass casing 6, thus forming an Lamps with Oxygen-Pumps; and I do hereby hermetically-closed chamber around the cardeclare the following to be a full, clear, and bons f and g,of which the lowerone, f,is placed I0 exact description of the invention, such as upon the base 71 arranged within the glass will enable others skilled in the art to which it casing e, whereas the upper carbon 9 is surappertains to make and use the same. rounded and held by a tube i, carrying the My present invention relates to arc-lamps, soft-iron core 75 and suspended from the screwand particularly to that class of arc-lamps plug Z of any insulating material by means of 15 especially designed for very lengthy burning a helical spring m, whose other function will periods. a be more fully explained later on. Upon the One of the objects of my invention is to disk 0 is mounted a pump-cylinder n, and in provide means wherewith to effectually rethe latter a plunger-piston 0 is arranged and move the superfluous oxygen usually accumovably connected at p to the heavy rod q of 2o mulating in the glass casing surrounding the very soft iron entering the electromagnetic carbons during a time of disuse, whose prescoil a, placed in alinement above the cylinder ence retards the formation of the are of light 71 and connected, on the onehand, by the wire and causes the flickering of the latter when 8 to the coil a, and, on the other hand, by the formed. wire 25 to the tube 7). Directly beneath the 75 25 Another object of the invention is to proplunger-piston o the disk 0 is provided with vide means to prevent the breaking of said an opening a, which under normal condition glass casing in case an explosion of the accuis closed by the ball-valve 1). To let the latmulate'd gases should take place when sendter under all conditions find its seat, that part ing the electric current through the lamp. of the surface of the disk 0 inclosed by the 30 The accompanying drawing shows a verticylinder at is sloping downwardly to the opencal sectional view of the diagrammaticallying a. In a similar manner the top of the represented new arc-lamp. plunger-piston 0 is provided with an opening In arclamps especially designed for very w, capable of being closed by the ball-valve lengthy burning periods superfluous oxygen 0;. hen now the electric current is admit- 3 5 will accumulate in the glass casing surroundted to the electromagnetic coil a, it will flow ing their carbons on account of the imperfecthrough the latter, from thence by way of wire tions in the construction of their fittings, s to the coil 0', and reach the tube 1) bymeans which, being manufactured in large quantiof the wire 25. The tube Z) will lead the curties, are not as effectually excluding the air rent to the wire y, connecting the tube 1) with t 40 as desirable. "When under these conditions the helical spring on, attached to the upper the arc-lamp is connected with a circuit, the end of the tube 1', whose lower end is provided are of light will soon be interrupted on acwith a hinged catch ,2, surrounding and holdcount of the expansion of the heated oscillating the upper carbon 9 by means of its oneing air in said glass casing, thus causing the sided attachment to the tube 1', thereby trans- 45 flickering of the light. The explosions spoken mitting the electric current to the carbon g, of above are another great drawback to this from whence it is passing to the carbon f, wire class of lamps as at present constructed and 1, and resistance-coil 2, and from thence back are caused by the ignition of the gases which to the circuit-line. usually are accumulating during a prolonged As soon as the electric current is flowing, I00 50 disuse of such lamps and which when taking as indicated above, the core 7; and the rod q,

place are with rare exceptions destroying the acting as core to the coil 0, will be drawn upward through the influence of the electromagnetic coils a and 0', respectively, whereby the motion of the core causes the carbon 9 to ascend, thus establishing the arc of light between the points of the carbons f and g, whereas the upward motion of the rod q causes the plunger-piston 0 to ascend, which in turn will draw the ball-valve i] upward, and thereby remove the superfluous amount of oxygen which may have accumulated in the glass casing during the time of disuse of the arc-lamp. The ball-valve 50 remains, of course, seated during the upward motion of the plunger-piston 0, so that the volume of oxygen removed from the interior of the glass casing 0 will beheld between the disk 0 and the hollow plunger-piston 0 as the ball-valve 'U is closing the opening a the instant the carbon g has been sufficiently raised to establish the are of light. As'soon as the superfluous oxygen has been effectually removed in the way described above normal conditions between oxygen and nitrogen are established within the glass casing and an extremely steady light secured. Upon cutting off the electric current the carbon 9 will drop down and contact with the lower carbon f, whereby the catch may loosen and regain its hold upon the carbon fin any suitable manner in order to be ready to raise the latter when the current is again admitted to the coil a. Simultaneously with the dropping of the core 7.: the rod q of the plunger-piston 0 is given free by the electromagnetic coil 4', causing the plunger-piston 0 to drop to the bottom of the cylinder 12, whereby the ball-valve x will be opened to let the oxygen filling the space between both ball-valves escape into the atmosphere.

Besides establishing the arc of light far quicker than hitherto and securing a very steadily burning light by removing the superfluous oxygen from the interior of the glass casing c, the burning period of the arc-lamp is considerably prolonged.

If for certain sizes of arc-lamps one pump should prove to be insuflicient, two or more of them may be provided. In case the gases collecting within the glass casing during the disuse of the arc-lamp should be present in such proportions that upon the formation of the are of light an explosion is taking place the two ball-valves, acting for the time being as simple relieve-valves, will be opened through the pressure created by the explosion and let the products of explosion escape into the at mosphere without endangering the glass casing in the very least, which hitherto under similar conditions was destroyed with very rare exceptions.

I do not desire to limit myself to the precise constructions and arrangements shown, as it is obvious that various modifications may .be made therein without departing from the essential features of my invention.

I claim 1. In an arc-lamp of the class described,

the combination with the closed chamber surrounding the lamp-carbons of an electromagnetically-operated oxygen-pump comprising a pump-cylinder; a valve to establish communication between the interior of said closed chamber and said pumpcylindcr, a plungcrpiston within said pump-cyliinler; a valve in the top of said plunger-piston to establish communication between the interior of said plunger-piston and the atmosphere; an electromagnetic coil in electric connection with the means causing the vertical motion of the upper carbon and with the means conducting the electric current from said electromagnetic coil to said upper carbon; and a plungerpiston rod operated by said electromagnetic coil.

2. In an arc-lamp of the class described, the combination with an electromagnetic coil of a conducting-tube partly surrounded by said coil; a screw-plug hermetically closing the upper end of said tube; a lamp-carbon arranged in said tube and operated by said electromagnetic coil; a double-flanged disk on the lower end of said tube; a glass casin held by the double flange of said disk; a second lamp-carbon arranged within said glass casing; a pum ji-cylinder mounted upon said disk; a valve for establishing communication between the interior of the glass casing and said pinup-cylinder; a plunger-piston in said pump-cylinder; a valve in said plunger-piston for establishing communication between the inside of the plunger-piston and the atmosphere; a second electromagnetic coil electrically connected with the firstmentioned electromagnetic coil and with the tube partly surrounded by the latter; and a rod movably secured to said plunger-piston and operated by said smaller electromagnetic coil.

In an arc-lamp of the class described, the combination with an electromagnetic coil causing the motion of the upper lamp-carbon of a tube partly surrounded by said coil; an insulating screw-plug hermetically closing the upper end of said tube; a smaller tube within the first-named tube; a hollow core forming part of the smaller tube and capable of being influenced by said electromagnetic coil when the latter is energized; a hinged catch at the lower end of said smaller tube, a carbon within the latter held by said catch; an elastic connection between the upper end of said smaller tube and said screwplug; an electric conductor between said larger tube and said elastic connection; a flanged disk on the lower end of the larger tube; a glass casingheld by said flanged disk; a base placed within said glass casin g; a car bon supported by said base; an electric con ductor passing through said glass casing and connected with said base; an oxygen-pump placed upon said flanged disk and communieating with the interior of said glass casing, and a second electromagnetic coil operating said oxygen-pump and electrically connected closed chamber suspended from the lower end of said tube, a second lamp-carbon arranged within and supported by said closed chamber; an oxygen-pump mounted upon the top of said closed chamber and communicating with the interior thereof; a second electromagnetic coil for operating said pump and electrically connected with the means operating the upper lamp-carbon and with the tube surrounding the latter.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

HUBERT EMONDS.

\Vitnesses:

HENRY QUADFLIEG, D. J. REUTER.

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