US274997A - tan choate - Google Patents

Description

" (No Model.) v s. F. AN CHOATE.

ELECTRIC ARC LAMP.

No. 274,997. Patented A r; 3,1883.

I Mwewkm Wmmm I UNITED. STATES PATENT. price..

ELECTRlC-ARC-LAMP.

BRECIFIGATION forming part of Letterslatent No. 274,997, dated April 3, i883. e I Application filed June 12, 1582. (No model.)

To all whom it may concern;

uUs F. VAN

Be it known that I, SILVA CHOATE, a citizen oftheUnited States, and a y residentofNew York, in the county otNew York and State of New York,'have in vented certain new and useful Improvements in Electric In the'accompanying drawings, Figure 1 is a vertical central section onthe line B B, Fig,

2, of one form of lamp constructedaccording to my invention. Fig.2 is a horizontal sectionon the line A A ofjFig. 1.

l O is the globe or casing for the light-giving portion of the lamp, and D is an exterior translucent casing, the neck 'ot' which is tightly fitted about the neckol the interior globe at E,-and may be hermetically sealed at that point, if'l-desired. i

In order tomalic the description of my'invention more intelligible, and that its nature may be more clearly undersiood, I' will first state that F F represent-the division or sealing line between the bounds of the scaled case or globe and the other mechanisms, fixtures, and supports of the lamp and said case or globe. Whatever shapes or forms said case or globe and the said mechanisms and supports may assume, there will necessarily be a similar division-line between them. Everything on one side of this line is to be considered as within said case or globe and er'er ','thi ng on the other" side of said line is to be considered asou'tside of said case or globe.

G represents a cup or holder, oi brass or,

othersui'tablc material, supporting the lamp and inclosing the spool of the magnet.

' 11f represents th cmagnet, the pole of which extends beyond the line F 17 into the interior of the casing 0, into proximity with anarmature',"K, which isfpivoted in a block or'stopper, L, secured to the head of the magnetspool, and fillihgthe neck of theglobe 0, so as to close it hermetically. The stopper L may be formed integral with the core of the magnet or with the head of the spool.

Connected to or forming, a portion ofthe armature is a conductingrod or holder, M,for one of the electrodes X, while the metallic holder or support 0, carrying the other electrode, is mounted in an insulating-plug seated in a hole bored in the block or stopper L. A

coiled spring, seated in a transvcrsergroovelin the block L, as shown, bears against the armature and tends to bring the electrodes into contact. When the electric current passes, the armature is attracted 'and separates the electrodes, thus forming the arc, which continues to burn so long as the current flows and the electrodes and u re.

The magnet His bored longitudinally at one side toreceivethe. insulated condnctin g-wire R,

which is connected to the end of thesupport O. The other conducting-wire, S, is connected directly to the magnet H, from which the current passes to the support M through the plug L, which, in the arrangement of the connections here shown, is madeof a conducting material, preferably brass, because its ratio of expansion and contraction by heat is more nearly like that of glass than most other conductors. The coils of the magnet are placed in circuit with the wires R S and the electrodes N in a well-known manner.

, "Ihearma-ture and the other parts within the globe C may be mounted and supported in other ways without departing from the spirit of my invention, and any suite}; means for sealing saidglobe may be en 'gioyed.

I generally prefer to seal the exterior globe, D, air-tight, although this is not absolutely necessary, and it..might evenbe made with openings, and might simply. form a hood, the

idea -being to prevent free circulation oi the euvelc'peofair which is iii-contact with the interior globe, so that said globe shall not sud- 'denly cool when the light isput out, and to also protect it' "from the direct actionofi exterior currents of. cold air when the lamp is burning.

It is QTvious that the magnet might act upon the armature through the wall oriother portion of the casing,inste ad of extending into the interior thereof; Such a'moditlcatijon is shown in Fig. 3, the various parts being indicated by the same letters as in Figs. 1 and 2.

"a sealed casing, of a magnet the pole of which projects into the lemp'casing', said magnet being bored longitudinally to form it passage way for an insulated com] ucti n g'wire connect t ed with the interior portions of the lamp.

2. The combination, with the lamp globe or casing, of the plug L, the armature lever mouiited in said plug .and carr ing one of the electrodes, and thelstendard O, also unpr nted in the plug; and carrying the other electrode.

3. The eomhiuetioii with the pivoted electrodediolder M, mounted on armature K, so as to be movable from the opposite electrode to i'orm theatre, of a sealed casing s'urroundingseid holder and armature, and an exterior'magnetiz- 'iug-eoil for the electro-nmgnet which acts upon said armatiwe.

4. The combination of the sealed easing 0, the plugL, the fixed electrode-holder Q, the

pivoted armature K, the holder; M mounted the alli S0, S1 to reek to and from the opposite holder, and the electromegnet H, arranged in the manner described, to act upon the armature in the sealed casing" and cause the separation of the electrodes. 5. The combination, with an electric light, of a sealed casing, C, and an exterior casing, l); within whose neck the neek of easing U is fitted,- substantially asideeeribed.

The iee eien of the casing O, theplm L, fitting tilt-Q,- the inside of the neck of said me ee, d attaehed to themagnet H,the

armature K, pivoted in the plug, and the coiled spring let into the plug and acting to force the ermat-nve laterally away from the pole of the magnet.

Signed at New York, in the county of New Yorkand. State of New York, this 10th day of June, A. 1). 1882.

SILVANUS VAN OHOATE.

Witne H. QTQW'NSEM), THo-s. Tooivmv.

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