US1148128A - Deflector for electric lamps. - Google Patents

Description

C. L. STRYKER. DEFLECTOR FOR ELECTRIC LAMPS. APPLICATION FILED MAR-29,1915.

M48428. Patented July 27, 1915.

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unrrn s'rass PATENT OFFICE.

CLIFFORD L. STRYKER, OF BUFFALO, NEW YORK.

DEFLECTOR FOR ELECTRIOLAMPS.

To all whom it may concern Be it known that I, Cmrronn L. Srnrnnn, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Deflectors for Electric Lamps, of which the following is a specification.

This invention relates to a deflector which is designed more particularly for use on the incandescent electric lamps of automobile head lights and has forits object the production of a deflector of this character which is simple, efficient and inexpensive in construction and which can be readily applied to and removed from the incandescent lamps of the various types of head lights now in general use for controlling the projection of the light from the lamp so that only the roadway ahead of the automobile is illuminated up toabout the waist line of a person standing in the street or riding in a car leaving the space above this line in darkness and thereby avoid dazzling or blinding the eyes of persons by the glare of the head lights.

In the accompanying drawings: Figure 1 is a sectional elevation of part of an automobile head light having its incandescent electric lamp bulb equipped with my improved deflector and showing in diagrammatic form the effect of this dimmer on the space in front of the head light. Fig. 2 is.

a side elevation, on an enlarged scale, of

an incandescent electric lamp bulb equipped with my. improved deflector, the latter being shown in section. Fig. 3 is a plan View thereof. Fig. 4- is a front elevation of the same.

Similar characters of reference indicate corresponding parts throughout the several views.

1 represents the reflector of a head light such as are commonly used on automobiles,

which reflector may be of semi-spherical or i parabolic form. At the center of this re- Hector the same is provided with a forwardly opening socket 2 which is adapted to receive the shank 3 of an incandescent electric lamp bulb 4 which latter may be of any suitable and well known construction,

My improved deflector which is applied to this lamp bulb comprises a rear shield section 5 preferably of sheet metal having a moderate degree of flexibility and of semiglobular form so as to embrace and cover Specification of Letters Patent.

Application filed March 29, 1915.

Patented July 27, 1915.

Serial No. 1?,803.

parts of the rear side and underside of the globular bulb and also provided in its rear part with an opening 6 which is adapted to receive the shank of the lamp. The front part of the rear-shield section is so constructed that the same forms jaws 7 which extend forwardly and upwardly beyond the swell or axis of the 1am bulb on diametrically opposite sides thereof, thereby causing this rear shield section to grip and embrace slightly more than one-half of the globular form of the lamp. By this means the upper front portions or jaws 7 engage frictionally' with the lamp bulb for holding the rear Y shield section securely on this bulb. In addition to the rear shield section it is desirable to also employ a front shield section 8 the bulb, as shown in Figs. 2 audit. This front shield section is preferably retained in place on the lamp bulb by connecting its rear edge with the front edge of the rear shield I section by means of longitudinal springs 10 arranged on diametrically oppositei sides of these shield sections and adapted to engage with horizontally opposite sides of the lamp bulb, as shown in the drawings.

In applying this deflector to an electric lamp bulb it is only necessary to first slip the rear shield with its opening over the shank of the bulb and spring the foremost parts or jaws 7 over the bulging sides of the bulb, and then stretch the springslO sulficicntly to permit of engaging the front shield sectilon over thetip of the lamp, after which these shield sections are reliably held iii-place on the bulb and prevented from be coming detached when the head light is in use by the resilience ofthe parts 7 and the proved deflector an mounted in the reflec tor of a head light t..e bulk of the rays of light emitted by the incandescent filament are prevented from radiating downwardly upon the lower part of the reflector whereby the latter is prevented from throwing such light upwardly across the axis of the lamp and into the eyes ofipersons standing on the road ahead or occupylng the seats of automobiles or vehicles Similarly situated. The rays of light from the upper part of the lamp are, however, permitted to pass freely upward to the upper part of the reflector which latter in turn throws these light rays downwardlyacross the axis of illumination and lights'up the street or roadway ahead means the space ahead of an automobile is illuminated high enough for all practical purposes to insure safety of travel while the space above the axis of the lamp is niaintained in substantial darkness, thereby avoiding the dazzling glare in the eyes of persons in front of the auto and the accidents which otherwise would result from glaring and dazzing head lights as heretofore constructed.

This deflector is comparatively inexpensive in construction, the same can be readily applied to and removed from the standard incandescent electric lamps for headlights now in common use, and owing to its sim-- plicity of construction the same is not liable to get out of order. Furthermore, my improved deflector permits of variations in the size or contour of the lamp bulbs, to a limited extent and still permit the dimmer to adjust itself to these bulbs.

I claim as my" invention:

1. A deflector for incandescent electric lamp bulbs comprising a rear shield section adapted to cover parts of the rear and under side of the bulb and an independent front section adapted to cover the central part of the front side of the bulb and connected with said rear section.

'2. A deflector for incandescent electric lamp bulbs comprising a rear shield section adapted to cover parts of the rear and underside of the bulb and a front section adapted to cover the central part of the front side of the bulb, and a flexible connection between said front and rear shield sections.

3. A deflector for incandescent electric lamp bulbs comprising a rear shield section of semi-globular form which has an opening for receiving the shank of the bulb and which is constructed to cover parts of the rear and undersides of said bulb and embraces the latter slightly in front and above its swell on dial'i'ietrically opposite sides thereof, a front shield section having the form of a cap which is adapted to fit over the tip of the bulb and COVQl the central part of the front side thereof, and springs connecting the front shield section with the rear shield section on diametrically opposite sides thereof.

CLH FORD L. STRYKER.

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