US472801A

US472801A - George c

Info

Publication number: US472801A
Authority: US
Publication date: 1892-04-12
Anticipated expiration: 1909-04-12

Description

"ma Model.)

' G. G. BAI1.1.1531).`

INGANDESGBNT BLEGTRIG LAMP.

PatentedlAplnlZ, 1892.

'a-y?? wall/ging @2go @Hmm @d1/'wesen UNITED STATES PATENT OFFICE- GEORGE o. RAILLAR'D, OE NEw YORK, N. Y.A

INCANDESCENT ELECTRIC LAM P.

SPECIFICATION forming part of Letters VPatent No. 472,801, dated April 12, 1892.

Application tiled September 22,1891. Serial No. 406,440. (No model.)

.To a/ZZ whom it may concern:

Be it known that I, GEORGE C. BAILLARD, a citizen of the United States, residing in New York city, State of New York, haveinventedv that both of the circuit-wires may readily be..

simultaneously coupled or connected with the filament-terminals in a manner to give a good and permanent electrical connection and disconnected therefrom with equal facility.

The invention further relates to an improved construction of lamp-key, as hereinafter set forth in detail.

In the accompanying drawings, Figure l is a longitudinal central section showing my improved lamp, as well as the manner of supporting the shade and attaching the lamp to the fixture. Fig. 2 is a plan view on the line 2 2, showing a means whereby the circuitwire terminals may be coupled with the termirals of the filament. Fig. 3 is a similar view, the ends of the circuit-wire being indicated therein. Figs. 4 and V5 are detail views of the key-switch and contacts, with theI operating-key or thumb-piece removed.

The sealed glass-bulb A is secured in the ordinary manner in a depression or socket in abase B of any suitable insulating material. C indicates the carbon or other filament, the terminal wires c of which are carried through the sealed bulb and each electrically connected with a tubular terminal c', embedded in the face of the base B. The base is screw-threaded upon the exterior, and is adapted to receive a correspondingly-threaded cap E, having therein two curved slots e, the inner projecting wall e of which cover the tubular terminals c when the cap is screwed down. rlhe cap being screwed down, a reverse partial turn exposes the tubular terminals c', they then being seen, as in Fig. 2, at

or near the ends of the curved slots. If not, the ends CZ of the circuit-wires are each inserted in one of the tubular terminals and the cap or clamping deviceE is again screwed up. The projecting interior walls ot the slots moving across the openings of.the terminals come against and press the terminal wires laterally, clamping them against the sides or edges of the tubular terminals and between the under face of the cap and the base, as in Fig. 3. To facilitate this operation, the under faces of the projections eiare beveled, as

indicated atf, Fig. l, and also in Figs. 2 and 3- by the dotted lines. The cap being screwed down tightly, the wires are firmly clamped in and against the tubular terminals and are at Vthe same time securely held away from each other, and being protected by the cap or clamping device there is' no danger of their being short-circuited by the accidental contact of a tool or wire.

In Fig. l the terminal wil-escl are shown as passing down straight through the slots in the cap into the tubular terminals,"the turn or screwing np of the clamp not having been completed. This has been done merely for convenience of illustration.

In the drawings I have shown a loose cap X, resting upon the base of the lamp (the clamping device or cap `E forming part of the base as distinguished from a socket) and through which the twisted circuit-wires are passed; but this is merely for an ornamental iinish and may be dispensed with.

The key is constructed and arranged as t'ollows: One of the wires c, leading to one of the filament-terminals, is broken and the ends respectively connected with metal contacts or brackets O, mounted opposite each other on the bottom of an annular recess turned or formed in the side of the base. One of kthe brackets carries a projecting contact-piece or linger o, arranged adjacent to the wall of the recess, and the other bracket carriesa projecting contact-spring o', the end of which overlaps the finger 0 and is bent to form a notch or depression o2 in its inner face near its end. The direction of tension of the spring holds it away from the contact-linger and the circuit between the filamentand its terminal is therefore normally open. The bracket and finger or spring are in the construction shown struck up from one piece 'of sheet metal. A switch or key lever P is pivoted centrally in the recess in the base. Its longer end p plays between limiting stop-pins p and its opposite ends p2 work against the contact-spring 0,. The switch-lever is moved in one direction or the other by pins s s projecting from the inner face of' a button or thumb piece S, fitting in the recess and turning upon vthe same screw-bolt S on which the lever is pivoted. In Fig. 4 the switch or key is open and the end 102 of the lever is engaged by the notch or depression o2 in the contact-spring.

In Fig. 5 the circuit is closed, the lever havT ing been turned so. that its end has forced the spring outwardly into contact With the finger o, in Which position the parts are maintained by the pressure of the spring on the lever.

The lamp shade or reflector maybe supported as follows: A ring G, of metal or other suitable material, is secured peripherally around the cap E and has depending springarms g (three being shown) bent or hooked at the ends to engage the flange g of any ordinary shade G'.

To secure the lamp to a bracket or chandelier-fixture, I provide a screw-threaded collar I-I, adapted to screw upon the tube of the iixture through which the Wires emerge and having downwardly-projecting arms or clips h (three being indicated) that snap into recesses or an annulargroove hin the cap E.

I claim as my invention- 1. An incandescentlamp having in its base tubular filamentterminals, the slotted clamping plate or cap movable transversely across said terminals to cover or expose them for the insertion of the ends of the circuit-wires, whereby the ends of the wires may be clamped Yin the terminals by lateral strain, and a key in the side of the base, substantially as and for the purpose set forth.

2. The combination of thel bulb and filament, the lamp-base in which the bulb is seated, the filament-terminals on the base, a recess in the side of the base, the contactfinger and contact-spring located in said recess and interposed in the wire connecting the filament and one of its terminals, the pivoted switch-lever operating upon said spring, and the lever-operating button seated in the recess in the side of the base.

3. In an incandescent lamp, the 'combina-y tion of the base having the recess in its side, the brackets O, the contact-linger, and the overlapping contact-spring arranged within the recess W, the switch-lever pivoted i-n the recess, and one end of which works against the contact-spring and the other between limiting-stops., the button itting in the recess, the pins on its inner face for operating the lever, and the screw-bolt screwed into the'base and on which the lever and but-ton turn.

In testimony whereof I have hereunto subscribed my name.

GEORGE C. BAILLARD.

Witnesses:

FRANK S. ODER, EDWARD C. DAVIDSON.