US476183A

US476183A - James ball

Info

Publication number: US476183A
Authority: US
Publication date: 1892-05-31
Anticipated expiration: 1909-05-31

Description

(No Model.)

- J. BALL. INUANDBSGBNT LAMP.

Patented May 81,1892.

@Mx/MM" il'NrTED STATES A'rnrrr einen.

JAMES BALL, OF I-IOLYOKE, MASSACHUSETTS, ASSIGNOR OF T\VOTHIRDS TO JAMES T. ABBE AND GEORGE N. TYNER, OF SAME PLACE.

INCANDESCENT LAMP.

SPECIFICATION forming part of Letters Patent No. 476,183, dated May 31, 1892.

Application filed November 23, 1891. Serial No. 412,748. (No model.)

To @ZZ whom it may concern:

Be it known that I, JAMES BALL, a citizen ot' the United States, residing at Holyoke, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Incandescent Electric Lamps, ot which the following is a specilication.

This invention relates to improvements in that class of the incandescent lamp wherein ro are embodied two or more filaments, each ot' which has connected thereto electric conductors, which are extended outside of the vacuum-chamber, so that either of the iilaments is available to be placed subject to the r 5 electric circuit, as circumstances may render advantageous.

The invention consists in improved coustructions and the combination or arrangement of the parts, all substantially as will zo hereinafter more fully appear, and be set forth in the claims. y

In the accompanying drawings the present invention is illustrated, Figure l being a per spective view of a common form of incandescent electric lamphaving the present improvements applied thereto. Fig. 2 is a longitudinal section through the parts of the lamp which more particularly pertain to the invention. Fig. 3 is a perspective View in detail of 3o one of the binding-posts employed. Fig. 4 is a cross-sectional viewof the lamp on line 5 5, Fig. l.

In the above drawings it has not been deemed advisable to show the socket for the lamp, although the switch is shown in Fig. 1, and in said Fig. l a section a of a screw-ring is shown, which constitutes a part of the socket. Also, in the drawings, tor the purpose of perspicuity and avoidance of confusion, one of the filaments is indicated, as by a heavy black line, and the other y by double light lines.

In the drawings and as usual, b represents the thin metallic screw-ring, which is adapted to screw-engage the socket, of which the said section (indicated at a) is a part.

d represents one of the leading-in wires or filament-conductor extensions, which has its outer end connected to or in contact with the 5o screw-ring and extending thence through the insulating plaste1ofparis f within the ring and through the inverted glass dome g, which forms the upper part of the globe, has its extremity disposed within the vacuum-space of the globe, and at l0 receives in connection 55 therewith the end ofthe filament as. Said filament thence extends in the usual bowed course and has its other end attached to the other leading-in wire 7L therefor, which, extending throughthe said glass dome and insulating 6a material and without contact with the screwring, terminates in contact with the bindingpost i, which is stewn as embedded in the plaster-of-paris at the upper end of the lampshank, the binding-post being deemed preferable to the usual flat plate or shallow cup commonly used in a corresponding position in the Edison lamp.

j and 7c are the wires for bringing the cur-- rent to the lamp and leading it from the lamp 7o back to the line, the said wire j in Fig. l being shown as connected to a bindingpost on a part of the switch which is in electrical communication with the ring b, and. hence with the leading-in wire CZ. The other wire k is connected to the spring inger Z, which forms another part of the switch, and the said finger may or may not bear upon the screw of the binding-post, accordingly as the switchbutton m is or is not properly turned there- 8o for.

There is another binding-postte embedded in the insulating-tillingf in the shankof the lamp, from which another leading-iu wire 2O passes through the glass dome into the 85 vacuum-chamber and receives the one end ot the second filament y, the other end of which filament has an electrical communication with the screw-ring, and thence with the Wire j. This communication with the screw-ring is, 9o as specifically shown, by way ot the branch l2 of the leading-in wire CZ and through said Wire cl, the said wire performing the double duty of acting as a leading-in wire, to which one end ot' each of two filaments may be con- 95 nected. Now it will be seen that there is for each end of each filament a leading-in wire which is extended to an available point to be placed in electrical communication with the different wires j audk, which are included in Ico the circuit for the lamp. Vhile, as seen, a leading-in Wire may be in connection with the one end, respectively, of several filaments, the leading-in Wires to which the other ends of these filaments are respectively connected must be-insulated from vthe first leading-in Wire; and now With reference to the drawings, Figs. l and 2, it will be seen that the filament y is in the circuit for the current, which may come into the lamp through the Wirej, passing through the socket and screwring to the leading-in Wire CZ and through the filament y, thence by Way of the Wire 20 to the binding-post n, and through the switchfinger to the Wire k. The end a of the buttonspindle is constituted by an insulating material in order to prevent the lamp from being short-circuited. Now in case the filament y shcnld be severed or destroyed the filament w may be brought into the circuit, and this may be done by merely changing the screw for the binding-post u from its position on said binding-post to a position on the other binding-post t'. The current then coming in over wire j and through the leading-in wire d will avoid the branch l2, but pass through the filament Qc and then through the Wire 7L and the switch-finger to the wire k, or of course the current may be reversed, first coming in through 7c and l1 and passing` out through d and j.

Having thus described my invention, what space of the lamp, tWo or more separate me tallic socketed pieces set in the said insulating material, several filaments, each having its one end connected to suitable portions of said leading-in Wired, and leading-in Wires which are respectively connected to the other ends of the filaments and lead, respectively, to said socketed pieces, a screw-plug adapted to be set in either of said socketed pieces, and a switch having the movable finger l, adapted to range across all of' said socketed pieces and adapted to have connection With the one thereof in which the screw-plug may be set, as set forth.

2. In an electric incandescent lamp, the combination, with the globe or bulb having a suitable insulating material at its shank, of aleading-in Wire d, having a connection with a suitable metallic part Which is provided therefor at the shank and extended into the vacuumspace of the lamp, two or more separate metallic pieces set in the said insulating material, several filaments, each having its one end connected to suitable portions of said leading-in Wire d, and leading-in Wires which are respectively connected to the other ends of the filaments and lead, respectively, to said metallic pieces, a movable contact piece adapted to be supported vby either of said metallic pieces, and a switch having the movable'finger Z, adapted to range across all of said metallic pieces and adapted to have connection with the one thereof on which the movable contact-piece may be set,substan tially as set forth.

JAMES BALL.

Witnesses:

H. A. CHAPIN, WM, S. BELLoWs.