US1619617A - Headlight - Google Patents

Description

March 1,1927;

w. B. JOHNSON HEADLI GHT Filed June 3. 1926 fi hwzmso,

ATTORNEYS V Patented Man 1, 1927- I UNITED STATES 1,619,617 PATENT OFFICE.

WILLIAM B. Joimsoiw, or LnxmqroN, x'nn'ruon.

HEADLIGHT.

Application filed June 3,

This invention relates to headlights and has for its object the provision of a device which will prevent the direct forward glare but which will also project sufficient light downwardly and forwardly for an efiicient lighting of the roadbed for driving purposes.

A further object of the invention is the provision of a reflector which will project the light downwardly and forwardly and in which a dull finished surface adjacent the bulb at the rear of a parabolic reflector prevents a blinding glare from affecting the driver of an approaching automobile.

This invention will -be best understood from a consideration of the following de-' tailed description. in view of the accompanying drawings forming a. part of the specification; nevertheless it is to be understood that the invention is not confined to the dis closure, bein susceptible of such. changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appended claim.

In the drawings:

Figure 1 is a vertical longitudinal section of a. headlight constructed in accordance with the principles of my invention.

Figure 2 is a vertical longitudinal section of a modified form.

Figure 3 is a vertical longitudinal section of a further, modified form of the invention.

Figure 4 is a transverse vertical section taken along the line 4.-4 of Figure 3.

Referring more particularly to the drawings, 10 desi ates an outer casing which is of cylindrica formation and provided with a rear end which is rounded and closed. The forward end is open and is provided with an annular flange 12. It will benoted also that the forward or open end is disposed in a vertical plane so that a trans rent cover 13 will beheld in place by a anged rin 14 which embraces the flanged portion 12 o the open end. Integrally formed with the ring 14 is a shield 15 which projects forwardly from the open-ended casing at a point adjacent the upper end. This shield will prevent any light from a reflector being reflec'ted upwardly and directly into the eyes of a driver of an approaching machine. I Aparabolic reflector 16 is securedto the inner rear wall-of the casing 10 by means of bars 17 which maintain the reflector in spaced relation with the casing. This re- 1926. Serial mi. 113,502.

flector is limited in area and is spaced some d1stance above the lamp 18 and terminates at a point indicated byv the numeral 19.

From this point forwardl is provided a reflector 20 which is of cylindrical shape and embraces the upper half of the housing 10 and terminates in lines through which passes the horizontal plane located in the axis of the reflector. j

A reflector 21 has a curved bottom which is secured at 22 to the bottom of the housing 10. The inner surface of this reflector is highly polished and is adapted to reflect the light upwardly towards the parabolic reflector 16 and is adaptedto cut oil a portion of the light rays which are projected forwardly from the open end of the housing. This reflector is curved and is tilted at an acute angle to the vertical.

The inner wall at the rear of the housing 10 is coated with a flat lead colored or gray paint so' that light from the lamp l8 striking the portion 23 will not be reflected and thereby prevent a direct forward glare of the light from the reflector. It will 'be noted that the paint is disposed just above the lamp bulb on the front-side of the parabola and extends downwardly to the bottom of the'same parabola.

It will be appreciated that instead of the hood 15 the lens or transparent member 13 may be covered with a coating or frosting to prevent the light rays from the upper portion of the reflector being projected outwardly of the case. Y

The lamp is received within a socket or sleeve 24 formed integrall with the rear end of the casing and provi es an opening or passage for the insertion of a tight fittin sleeve 25 which; has a bayonet slot 26. pin 27 on the base 28. of the light bulb is adapted to ride in said slot for locking the lamp in position. In the modified form shown in Figure 2 the front flanged end 12 is inclined at an angle to the vertical so that the forward edges 30 of the semi-circular reflector is likewise inclined to the vertical. The shield 15 which is formed integrally with-the ring- 14 must be slightly varied in form to meet the new conditions. The transparent member lor lens 13 is likewise inclined to the vertica The construction shown in Figure 3 is identical in all respects to the construction shown in Figure 1, with the exception that through which the lamp 18 may be projected the shield 15 is omitted. However, the reflector 21 and the reflectors 16 and 20 are similar in construction and formed of a single sheet of material. It is only necessary, in building such a device, to omit the shield from the ring 14*.

A shield 15 or 15 in either construction is made of metal and has a reflecting surface at its under side for the purpose of illuminating the front of the car to, which the reflectors are attached, and also to prevent the light rays from rising higher than the top of the lamp when the reflectors are properly placed on the cars. It will be appreciated that the members 15 or 15*- may be also made of some translucent material which will produce the same results.

It will be appreciated that the parabolic reflector 16-may be extended downwardly at the rear of the lampwith an opening therein and bent upwardl to form the reflector 21 at the bottom of t 1e housing so that the en tire reflectin ,surfaces are formed of one piece, provi ing a unitary structure. this case the portion indicated by the numeral 23 will then be painted as previously explained to prevent a reflection of light,

This construction will have the same effect as those shown in Figures 1 and 2.

The reflector 21 is adapted to reflect the light upwardly towards and directly against the reflector 16 thereby producing a stronger reflected light from the reflector 16 towards the road and straight ahead of the automobile.

The painted parts are of such dull color that no light will be reflected from the same. However, the light shining upon the portions 16 and 20 or 20 will be reflected downwardly along the roadbed. Light which is reflectedcby the member 21 will aid in intensifying the light reflected from the member 16 but cannot in any way affect the eyes of an oncoming driver. The particular disposition of the reflectors 16, 20 or 20 is such that the are not visible and therefore do not ten to project blinding rays of light from the device.

hat I claim is:

A headlight comprising a housing open at one end, a parabolic reflector located within and across the to of the housing, a semi-cylindrical reflector disposed in front of the parabolic reflector and formed integrally with said parabolic reflector and ex tending along its opposite edges below the bottom edge of the parabolic reflector, a reflector secured to the bottom of the housing and projecting forwardly of the same, the rear edge of said reflector terminating in a plane with the rear edge of the second mentioned reflector, a lamp carried by the rear wall of the housing, and a dull surface embracing the lamp and extending forwardly and terminating at points along the housing where the plane which passes through the rear edges of the last mentioned reflectors cuts the housing, said surface also extendingupwardly at the rear of the housing to a point adjacent the lower edge of the first mentioned reflector.

WILLIAM B. JOHNSON.

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