US1793398A

US1793398A - Electric lamp

Info

Publication number: US1793398A
Application number: US246045A
Authority: US
Inventors: Hamberger John
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-01-11
Filing date: 1928-01-11
Publication date: 1931-02-17
Anticipated expiration: 1948-02-17

Description

Feb. 17, 1931. J. HAMBERGER 1,793,398

ELECTRI C LAMP Filed Jan. 11, 1928 Patented Feb. 17, 1931 PATENT OFFICE JOHN HAMBEBGER, b! RICHMOND HILL, NEW YORK ELECTRIC LAMP Application filed January 11, 1928. serial No. 246,045.

This invention relates to improvements in electric lamps, one object of the inventlon being the provision of a lamp bulb for use in the headlight of an automobile and which is rovided with means whereby the rays there rom may be so controlled as to provide a glare light during ordinary driving and a courtesy or dimmer light when passing another automobile. A

Another object of this invention is the pro Vision of a light bulb of this type in which two filaments are provided, the filament to produce a bright light being "located at the focal point of the bulb and the dimmer or courtesy filament being of smaller capacity and belng nearer the tip of the bulb, means being provided for directing the rays of'light from the .latter filament so that the same will be projected downwardly upon the road or surface 2 traversed and, if desired, to either side according to the customs of the country in which the light is used.

Another object of this invention is the provision of an electric light bulb of the type referred to which may be readily installed the present type of automobile headlights without the necessity of employing special lenses for directing the rays and of which the two filaments may be energized at will from the seat of the automobile.

In the accompanying drawings Figure l is a side elevation of an electric lamp bulb embodying this invention Figure 2 is a side elevation thereof, the bulb being shown in section;

Figure 3 is a rear end view of the lamp Figure 4 is a rear end view of the bulb havingpa modified form of base; igure 5 is an enlarged longitudinal sectional view through the deflector for the dim mer or courtesy light;

Figure 6 is a perspective view of the-de-' flector or reflector per se; and

Figure 7 is a vertical central sectional view through one form of parabolic headlight having the present electric lamp bulb mpunted therein.

Referring to the drawings, a base 10 of non-conducting material is encased in the metal grounding sleeve 11, and this sleeve is provided with the attaching lugs or projections 12 diametrically disposed, while carried by the base is a glass bulb B with the depression 1) at the apex thereof to produce a better illluminating effect for headlights on automo- The

contacts

13 and 14 are disposed at the flat end of the base and are adapted to engage the necessary contacts within a socket 27,. as will presently appear, while grounded to the sleeve 11 and supported in the base and extended into the bulb is a'terminal and reflector supporting arm 15. Theforward portion of the arm 15 is bent at an angle, then transversely of the axis of the bulb as at 16 and then forwardly as at 17 substantially parallel to the axis of the bulb The portion 16 is substantially at a right angle to the axis of the base and to the main portion of the arm 15. A rod 18 extends longitudinally of the base and has its rear end connected to the contact 14 and has its forward end connected to one end of a filament 19, the other end of said filament being connected to. the arm 15. The filament 19 constitutes the-main filament of the lamp and produces the brilliant light for ordinarydriving.

An arm 20 having its rear end connected to the contact 13 extends longitudinally through'the base 10 into the bulb B beyond the forward end of the arm 18 and has its forward end bent transversely of the axis of the bulb and connected to' one end 'of the dimmer or courtesy filament 22, whose opposite end is connected to and supported by the portion 16 of the arm 15. T1118 filament, as before stated, constitutes the dimer or courtesy filament and preferably is of a less capacity than-the filament 19, and, as shown, is supported outwardly and beyond the focal point of the reflector 28, as will presently appear. J

The truncated pyramidal deflector or reflector 23, which is here shown made, of a reflecting metal, but which, however, may be made ofporcelain or any desired translucent or opaque material, or'be colored in any manner that may be desired, is attached to and'supported by the .15, it being here shown as provided at its rear end with two clamping fingers or lugs 24 which are bent around the portion 16 of the arm 15 and also having one of its longitudinal edges 25 bent around the forwardly-projecting portion 17 of the arm 15. Thus the deflector or reflector is supported with its concavity facing the filament 22, and in such a position as to deflect or reflect the rays from said filament to one side. This deflector has its forward end curved to form an auxiliary deflector 26 to act as additional means for providing the necessary projection of the rays of light from the filament 22.

As shown in Figures 3 and 7, the filament 22 and reflector 23 are so located in the bulb that when the bulb is mounted in the socket light, as is the usual practice,

- 27 of a reflector support S, the body of the deflector 23 will be disposed below the axis of the parabolic reflector 28 of the automobile lamp or headlight, with its concavity directed toward the filament 22 and the filament 22 and reflector 23 will be located in advance of the focal oint of the reflector 28, so that the rays 0 light generated by the filament 22 will follow the broken lines 30 (Figure 7) and thus be projected downwardly upon the surface traversed and not produce a glare in the eyes of the driver of an approaching vehicle.

The filament 19, as illustrated, is so located in the bulb that it will be at the focal point of the reflector 28 and rays therefrom will follow the dot-and-dash lines 29 (Figure 7 and be projected forwardly so as to produce a bright light for ordinary driving. The filaments 19 and 22 are adapted to be illuminated independently so that the operator of the motorcar may, upon an approach of a vehicle, deenergize the filament 19 and energ-ize the filament 22, thus eliminating the right light and energizing the courtesy light, which will project ample light rays from the reflector upon the ground immediately in front of his motorcar. In this manner, the danger of eliminating too rapidly the rays of light in the cutting out of the bright light andcutting in of the dimmer is avoided and the safety problem indriving at night is more or less solved.

In Figure 4, the contacts 13 and 14' are shown as out of alinement with the socket-. engaging pins 12', this providing a means whereby, when the lamp is mounted within the socket 27, the reflector 23 is slightly tilted, soas to cause the rays reflected therefrom to be deflected downwardly and toward the right or left, according to the custom of the country. 1

From the foregoing description, taken in connection with the drawings, it is evident that with an electric lamp constructed according to and embodying the present invention, the same may be readily substituted for necessary is the provision in the socket 27 of two separate lead-in wires for the

contacts

13 and 14 to control the respective filaments 19 and 22, so that with this type of lamp the lenses of the headlight may be of ordinary glass instead of specially constructed nonglare types,as are now in use.

It is also evident that by locating the filament 19 to the rear of the dimmer filament 22 and opposite the focal point of the reflector 28, the best possible results are obtained for straight driving, and that the deflector 23 for the filament 22 so positioned will not interfere, to any extent, with the ordinary driving light, yet at the same time, when the filament 19 is de-energized and the filament 22 is energized, the desired direction of the rays from the filament 22 will be so projected as not to interfere with the approaching driver and at the same time give ample protection to the operating driver.

I claim 1. An electric lamp comprising a translucent bulb, a base of non-conducting material having three contacts on its exterior, a lead having its rear end connected to one of said contacts and extending into the bulb with its forward end bent transversely to the axis of the bulb, a second lead having its rear end connected to another of said contacts and extending into said bulb with its forward end terminating short of the forward end of the first-named lead, a third lead having its rear end connected to the third contact and extending into the bulb, said third lead having its forward end bent transversely of the axis of the bulb between the transversely bent portion of the first lead and the forward end of the second lead and then bent forwardly in the same general direction as the axis of the bulb, a filament having its forward end connected to the first lead and its rear end connected to the third lead, a second filament extending between. said second and third leads, and a reflector having a pair of edges disposed at an angle to one another with one of said edges connected to the transversely bent portlon of the third lead and the other of said edges connected to the forwardly bent portlon of the third lead and with its reflectmg surface directed toward said first filament.

2. An electric lamp comprising a translucent bulb, a base of non-conducting material having three contacts on its exterior,.a lead having its rear end connected to one of said.

contacts and extending into the bulb with its forward end bent transversely to the axis of its rear end connected to the third contact and extending into the bulb, said third lead having its forward end bent transversely of the axis of the bulb between the transversely bent portion of the first lead and the forward end of the second lead and then bent forwardly substantially parallel with the axis of the bulb, a filament having its forward end connected to the first lead and its rear end connected to the third lead, a second filament extending between said second and third leads, and a reflector of substantially frusto-pyramidal form having its rear edge connected to the transversely bent portion of the third lead and one of its longitudinal edges connected to the forwardly bent portion of the third lead with its concaved surface directed toward said first filament.

3. An electric lamp according to claim 1 wherein the reflector has a portion of its edge which is connected to the transversely bent ortion of the third lead cut away and the first filament has its rear end connected to the transversely bent portion of the third lead at said cut away portion of the reflector.

In testimony whereof I have hereunto set In hand.

y JOHN HAMBERGER.