US1578920A - Electric lamp - Google Patents

Description

March 30 1926. 1,578,920

R. D.- ROBINSON ELECTRIC LAMP Filed Nov. 16, 1925 ET N jiavazzfri I Yieu@m 13. 23017112; 012 I Patented Mar. 30, i926,

. UNlTED STATES.

, REUBEN n. nonmsox, or sem 31mins, uicmoan, I

anaemic '1 Application filed Fovcmber 16, 1923. sealant-mam.

' T all whom it may concern:

Be it known that I, REUBEN RoniNsoN,

a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented new and:

useful Improvements in Electric Lamps,

of which the following is a specification:

The present invention relatesto electric lamps; and its object is to rovide in such a lamp a pluralityof electrlc-light-producing elements with improved means between them for preventing, the light from one ormore thereof from shiningin the same direction in which the light from another one or more of said elements shines.

This and any other objects hereinafter appearing are attained by, and the invention finds preferable embodiment in, the electric lamp hereinafter particularly described in thebody of this specificationand illustrated by-the accompanying drawings, in which Figure 1 is a right hand side view of an electric lamp with a parabolic reflector which is shown in vertical centralsection;

Figure 2 is a right hand'side view ofjsaid' damp" (enlarged), the light-shield thereof being shown in vertical longitudinal section' 7 re 3 is a front view of the same, the light-shield 'being shown .in vertical transverse section taken on line 3--3 of Figure2;, Figure 4 is 'a top plan view of the lightshield and'one of the light-producing ele-} ments; and

Figure 5 is' a right-hand side of the light-shield and of the light-producing -ele-.

ments; and showing another method Oi l P- porting the light-shield.

In the construction illustrated by the drawings, an electric lamp, adapted for use 'as an automobile lamp is shown, having a translucent (glass); globe or bulb l supported by its mounting member 2Jat its rear and located in the parabolic reflector-3. The principal illuminating. or light-producing element is shown in the form of a filament 4 electrically supplied by the leadin wires 5, 6 in the lamps glass-plug 7,

This principal light-producing element islocated at the focus ofrth e. parabolic reflector so that the rays of light therefrom may shine parallelly forward as'indicated in-Figure 1. I

a A second illuminating or light-producing the glass plug element is shown in the form of a filament 9 located in the bulb and between its rear end and the lightelernent or filament 4, i. e.,

vbehind said" filament, its purpose beingto function as a dimmer light.- ThiS second element is electrically supplied by the lead-f in wires 10 and 5 having a branch wire 11. It will be seen that only three of these lead-in wires extending through the lamps glass plug 7. are employed 'to electrically" supply] both the light-producing elements or fila ments 4 and 9. Inorder to prevent the-f.

light from the second light-producing elew shining forward! alight-- shield 12 is positioned b tw t e-twdelea ments 4 and 9; and in order to prevent the light from this second element .9 from shin ing upwardly, the light-shield lextends'at 13 horizontally above this element; and to prevent the light therefrom from shi-ning laterally, said light-shield extends down wardly at 14, 14 on the sidesfoffsaidelement; v

This light-shield may be supported inside 1 the bulb 1 by means of a rod 15 anchored in l 7 as; seen in Figure'li; or

by rods 16, 17 connected to the lead-in wires 5, 10 as-seen in the other views," in which case, one or both of these rods ;16, 1 7-1'nust' be of insulating'material;

The JoWersurface of The. vention being intended; to'

'rtion '13 of the.

light-shieldmay be light-reflecting so as. to reflect the -light from element 9 down-;

wardlyr pointed out "in the claims, is not to be limited to or by details of construction of the articular embodiment or embodiments-t ereof illustrated by thedrawingsor, hereinbefore shown orv described.

I claim:

1. In an electric lamp a translucent globe an electriclight-pr'oducingv elementthe globe; a second electrlc-light-produeing' element within, the globe and between, sai

-lfirst-mentione'd element and therear of the globe;; an opaque light-shield extending between 'said'elements. to prevent the light from said second-mentioned -element from -shining-forwardly but permittin it toshine downwardly, thelight from sai first-mentioned element shimng'forwardly, upwardly I and downwardly; means for electro-en'ergiz ing said elements separately. 2. i In an electric lamp: a translucent globe;

- an electric-light-producing element within the globe; a second electric-light-producin element within the globe and between sai upwardly and downwardly; means for electro-energizing said elements separately.

3. In an electric lamp: a translucent globe; an electric-light-producing element within the globe; a second electric-light-producing element within the globe and between said first-mentioned element and the rear of the globe; an opaque light-shield extending between said elements and above said second-mentioned element and laterally thereto to prevent the light from said s'ec-.

cud-mentioned element from shining forwardly, upwardly and laterally but per-' mitting it to shine downwardly, the light from said first-mentioned element shining forwardly, means for electro-energizing said elements separately.

4. In an electric lamp: a translucent globe; an electric-light-produoing element within the globe; a second electric-lightproducing element within the globe and between the first-mentioned-element and the rear of the globe; a light-shield extending between said elements and above said secondmentioned element and having a light-reflecting lower surface, to prevent the lightfrom said second-mentioned element fromshining forwardly and for reflecting the same downwardly, the light from said firstupwardly and downwardly; 4

mentioned element shining forwardly, up-

wardly and downwardly; means for electro energizing said elements separately.

In testimony whereof I have hereunto set my hand at Grand Rapids, Michigan, this 12th day of November, 1923.

REUBEN D. ROBINSON.

Images