US742706A - Electric-arc lamp. - Google Patents

Description

PATENTED OCT. 27, 1903.

J. MELZER. ELECTRIC ARC LAMP.

APPLIUATION FILED JAN. 2, 1903.

2 SHEETS-SHEET 1- H0 MODEL.

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No. 742,706. PATENTBD OCT. 27, 1903.

J. MELZER ELECTRIC ARC LAMP.

APPLICATION FILED JAN. 2, 1903.

N0 MODEL.

2 SHEETS-SHEET 2.

E 5 6," 6 6 66-6," Eweniofi No. 742,706. Patented October 27, 1903.

UNITED STATES PATENT OEEIcE.

JOSEPH MELZER, OF CLEVELAND, OHIO, ASSIGNOR TO THE OSBORN-MORGAN COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NElV JERSEY.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 742,706, dated October 27, 1903. Application filed January 2,1903. Serial No. 137, N l

To all whom it may concern: with the cap I), screwed onto the end of the Be it known that I, JOSEPH MELZER, a cititube. On the upper end of this tube A, bezen of the United States, residing at Oleve neath the cap I), is screwed a spider-ring E. land, in the county of Ouyahoga and State of This ring carries the portions J and J of the 5 Ohio, have invented a certain new and usecasin g. Rising from the ring are lugs c and ful Improvement in Electric-Arc Lamps, of e, on which rest dependent lugs (Z and d from which the following is a full, clear, and exact a plate D, the ring and the plate being sedescription, reference being had to the accured together by bolts E, screwing through companying drawings. the lugs e and d. The magnet Fis clamped IO The object of this invention is to provide between the plate D and the plate 0 above an arc-lamp adapted for either direct or alterit, bolts 0 holding these parts together. nating current in a form which shall be very he magnet F, which operates also as the cheap in construction, while being efficient in choking-coil, is of the horseshoe type, having service. 111 accomplishing this I arrange the a laminated core f, composed of a series of I5 magnet which operates the carbon-clutch in iron plates, around which is wound the usual suchaform that it itself operates as the chokconductor F, and this conductor is so aring-coil. This very much simplifies the conranged'that connections can be made to it at struction. To further simplify the construcvarious points, according to the currentwith tion, I connect the dash-pot directly with the which the lamp is to be used. These various 7o 20 armature of the magnet, the connection he points of connection are indicated at f in tween the armature and clutch having a flexi- Fig. 2. ble portion to prevent continuallyjerkingthe The pole-faces of the horseshoe are conclutch when alternating current is used. The caved to make a circular recess, and in this dash-pot prevents the too sudden shifting of recess is the cylinder II of the dash-pot, sup- 2 5 the carbon, as is usual; butby rigidly mountported by the plate 0, which at this point ing one of its members, as the plunger, upon makes a head for the cylinder. This cylinder the armature the construction is simplified is of some non-magnetic material, as brass, and the efficiency increased. This one of and between it and the magnet there is prefthe features of my invention. erably a padding G of felt or mica or some 30 Other features will appear hereinafter in non-conductor of heat.

the more specific description, wherefore my \Vithin the dash-pot cylinder H slides the invention may be most conveniently sumdash-pot plunger. This plunger has a head marized as consisting of the combination of 7c of magnetic material partly outside the cylparts described herein and definitely set out inder, which constitutes the armature for 3 5 in the claims. magnet. A rod 7c rises from this head, and In the drawings which clearly illustrate my a graphite filler 7& around this red constitutes invention, Figure 1 is a vertical central seca piston for the cylinder, the graphite being tion of the lamp. Fig. 2 is a plan in section carried betweentheinnerhead It and awasher of the combined magnet and choking coil. 70 at the upper end of the rod. 40 Fig. 3 is a vertical section across the two arms The result of the above-described construcof the magnet. Fig. etis a plan of the frame tion is that whenever the flow of current parts below the magnet. Fig. 5 is a sectional through the magnet increases the plunger is plan on the line 5 5 of Fig. 1, showing the drawn upward. lVhen it decreases, the switch. plunger gradually descends by gravity. 9 5 45 Referring to the parts by letters, A. reprc- Anyusualform of clutchmaybe employcd- I a l sents a central tube, which contains the upas, for example, a ring-clutch L shown. Exper carbon and which constitutes a portion tending upward from this clutch is a rod N, of the main frame of the lamp. In this tube the upper end of which is threaded. On this is contained a thimble B for receiving the upthread screws a nut I, to which is secured by [00 50 per end of the upper carbon Y, this thimble a screw 1) the lower end of a sheet-metal being connected by a flexible conductor 1) l clamp 19, which grasps a cord 19 connected in is one of the features like manner at its upper end to an arm 7;, depending from the plunger of the dash-pot. The flexibility of the cord prevents the very slight vibration of the plunger consequent upon alterations of the current from affecting the clutch, while the arrangement of the nut P allows the very convenient adjustment of these parts by the removal of the screw p and the turning of the nut in one direction or the other. The use of the flexible connection is already set out and claimed in my prior application, Serial No. 123,727; but the adjustable arrangement of the same shown herein of this invention.

Secured to the lower end of the tube A by clamping-plates R and R screwing thereonto is an insulating-block Q, which carries the rod T for the lower carbon. It also supports the inner globe S through the intervention of the spring S, links S and bolts S The outer globe S is supported by means of usual setscrews from a casing S suspended by hooks S, of which three may be conveniently employed. These parts, however, may be of any desired construction.

Mounted on the sleeve U, secured around the tube A, is a switch U, which operates to open the circuit or close it either without resistance or through the resistance V, which consists of a helix of resistancewire supported within insulators located at intervals around the periphery of the block Q. The resistance-wire is used when the direct current is employed, but idle with the alternating current, as the choking-coil then takes its place.

The blade 10 0f the switch is connected with the negative-carbon rod T and cooperates with the two contact-plates u and la the former of which is connected through the resistance V to the negative terminal, and the latter of which is connected directly without resistance to the magnet, the positive electrode leading through the choking-coil or magnet.

In Fig. 1, IV is the positive binding-post, and IW the negative binding-post, supported bya portion of the casing J clamped between the frame-plate O and the supporting-eye M. The course of the current is as follows: from the positive binding-post W, via the conductor 1, through the chokingcoil to the frame, and thence to the upper carbon Y, thence to the lower carbon Z, and via the rod T and the conductor 2 to the blade 101 of the switch. In the mid-position of the switch the circuit is open at this point. If the switchlever is shifted to engage the contact-point Lt, the circuit continues via the resistance V to the conductor 3 and thence to the negative binding-post If the switch is in the other extreme position, the circuit continues from the switch -lever to the contact-point 10 to the conductor 4:, and thence to the negative binding-post IV? By the above-described construction it will I be seen that I have provided in avery simple structure a lamp which may be used with either director alternating currents,the switch being simply thrown from the off position in one direction for a direct current and in the other direction for an alternating current. The consolidation of the operating-magnet and choking-coil into one structure, and likewise the consolidation into one structure of the armature and dashpot plunger, simplifies and cheapens the construction.

I claim 1. In an arc-lamp, the combination of a horseshoe-magnet,a dash-pot cylinder mounted between the pole-faces of the magnet, a plunger for said cylinder connected with the armature of the magnet and the earbon-clutcl I, substantially as described.

2. In an arc-lamp, in combination, a horizontal horseshoe-magnet, a vertical dash-pot cylinder mounted the magnet, an armature for said magnet rigidly connected with the plunger oi the dashpot,and a clutch connected with the armature, substantially as described.

In an arc-lamp, in combination, a horseshoe-magnet, a plate above the same forsupporting the magnet, a dash pot cylinder mounted between the pole-faces of the magnet, said plate constituting the head of the cylinder, a plunger for the dash-pot, the armature of the magnet being rigidly connected with said plunger, and a clutch operated by said armature, substantially as described.

1-. In an arc-lamp, in combination, a horizontal horseshoe-magnet, a dash-pot cylinder mounted between the pole-faces of the magnet, a framework for supporting said magnet, a central tube for the upper carbon carried by said framework, a plunger for said dash-pot, an armature rigid therein, an inwardly-extending arm rigid with the armature, a clutch for the upper carbon, and a flexible connection between said clutch and said arm, substantiall T as described.

5. In an arc-lamp, in combination, a horseshoe-magnet, a cyl inder mounted between the pole-laces thereof, a plunger for said cylinder, a rod extending through said plunger, an armature and an arm rigidly connected with said plunger by said rod, and a clutch operated by said arm, substantially as described.

6. In an arc-lamp, in combination, a i'nagnet, an armature therefor, an arm carried thereby, a flexible cord secured to-said arm and carrying a metal clip, a nut to which said clip is removably secured, a rod on which said nut screws, and a clutch operated by said rod, substantially as described.

In testimony whereof I hereunto al'lix my signature in the presence of two witnesses.

J ()Sltll I MELZER.

H. O. OSBORN,

\Vitnesses: l ALBERT II. Barns.

between the pole-.l'aces of IIO

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