US1685251A - Lamp - Google Patents

Description

Sept. 25, 1928. 1,685,251 F. THURBER LAMP Filed March 25, 1926 gwuenkoz.

Patented Sept. 25,1928.

. PL'AMR."

' Application filed ittarch 25,1926. serial rarere12,

The present invention relates to a ment for head lights for vehicles and the principal object is to provide an improved means for correcting errors in lamp-bulb filaments with respect to the focal point of a head light reflector. I

An object of the invention is the adjust-- ment of incandescent electric lamps to eifect proper focus of its filament relative to a reflector without distortion of the reflector or the lamp-holding means.

I A. further feature of the invention is a ductile or bendable connection, between the body of the reflector and a lamp holder, which connection, by manipulation, may be varied as to shape for the focusing of a lamp filament relative to the reflector without distortion of tion. For the purpose of deflecting light rays horizontallyto the road directly in front of the vehicle, it is necessary that the lamp globe filament be in true alignment with respect to the focal point of the reflector 11.

- In the form of the invention illustrated in Figs. 1 and 2, the casing 10 houses the reflector 11, the latter beinglocated with respect to the casing so as to provide an intervening space 12 therebetween. The reflector 11 and lamp casing 12 are formed with registering axial openings 13 and 14 and a sleeve 15 formed with a flange 16 is disposed in the refiector opening 13. A plate 16 of arcuate conformation is formed with opposite end lugs 17 and 18 and the centrally disposed boss 19, which extends Within the space 12 'between the reflector and easing. A circular opening is formed through the plate and boss and is adapted for the reception of the sleeve 15 and rivets 20 are utilized .to secure said plate 16 to the lamp reflector 11. I

A tubular member 21 is detachably received within the sleeve 15 and has itsouter end projecting through the opening 14-.0f the 21 in position therewithin.

'22 positioned within the outer end of the tubular member 21 and has secured thereto a contact pin 23 whileat its outer'end it is secured to the ordi- An incandescent globe construction and having a'filament'27 is arranged'in the lamp casing and it is the pri'-.

mary ob-j ect of t-heinven'tion to provide means nary socket member 24, the latter beingconnected to the lead wires 25 from the source of electric supply.

of theordina'ry for adjusting the globe in such manner that f the filament willbe positioned in alignment with the focal po nt of; the reflector.

The globe 26 isformed with a collar 28 which is received within the open end of the tubular member 21 in the usual manner, so

that the proper contact is made with the pin 3 23, and-a; screw" 29 passing through a di-' agonally disposed opening in the flange 16 of sleeve15 serves to hold the tubular member The plate 16 is constructed of some relatively' soft metal having ductile properties, so that the same is capable of being bent to provide for the adjustment of the sleeve 15 supporting the lamp globe 26. By virtue of I the ductility of plate 16 it is obvious that the 1 lamp supporting elements may be adjusted and held in such adjusted positionsto center the filament as aforesaid.

a 11 As shown in Fig. 1, the opening 13 through v the base of the reflector 11, is of somewhat" greater diameter than the external diameter of sleeve 15 in order to provide room for readily bending theconcave plate 16 to focus accurately the filament27; The opening 14 through the base of the casing lQ is likewise larger in diameter than the external diameter of the tubular member 21 so as not to interfere with the bending of the plate 16. In Fig. 3 I have illustrated a reflector 40 which at its central part in the'area' defined by the arc, as indicated by the dotted line 41, is

weakened to afford ductility in order that the same may be flexed to allow for the adjustment of the sleeve42 supportingtheincandescent lamp globe 43. j I a It is obvious that I have provided means for adjusting a. lamp bulb in a manner to dispose the lamp filament in focal alignment via-ted common defects encountered in the use of light gl'obes'of the ordinary construction,

'withthe head light reflector and have 010- f 'In combination with areflector having an opening therethrough a ductile plate secured to the reflector and having an opening registering with the opening in the reflector; a;

sleeve extended through the opening, in said plate; a tubular member seated n-smd-sleeve and adapted to receive an incandescent ,electric lampi; means carried by said sleeve whereby said tubular member may be length- 7 Wise adjustable in the sleeve, said plate bemgconstructed of ductile material whereby saidsleeve,- said tubular member and" the lamp the lamp may have universal focusing With respect to the reflector.

In testimony whereof, I have affixed mys1 gnature.

FRANK THURBER;

carried thereby may be bodily shifted With 7 respect tq thereflec torsothat the filament of

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