US1163353A - Globe for street-lighting. - Google Patents

Description

O. G. LUYHES.

GLOBE FOR STREET LIGHTING.

APPLICATION FILED MAR. 23. 1914.

1,163,353, Patent-ed Dec. 7, 1915.

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To all whom it may concern:

Be it known that I, OTTO G. LUYTIES, a citizen of the United States, and a resident of Sharon Springs, in the county of Schoharie and State of New York, have invented a. certain new and useful Globe for Street- Lighting, of which the following 1s a specification.

This invention relates to globes for street lighting. Its main object is to produce a llOllbllllCllllg globe of more than usual efficiency.

A further object is to produce a globe which will project an augmented amount of light to one side.

A further object is to produce a nonblinding frosted globe which will project an increased amount of light in a direction slightly below horizontal.

A, further object is to produce a globe for street lighting in which the light itself will. only be visible to observers who are at some distance from the globe and who will see the light against an illuminated The globe is translucent except for a" transparent band B. The translucency may be produced in any convenient way, preferably by frosting the globe on the inside. The source of light is preferably located at L, a little below the center C of the globe The transparent band B extends a little more than half way around the globe. This hand must belocated slightly below the source of light L.

The light thrown by this globe will be somewhat subdued in the manner common to all frosted globes in all directions except the diagonally downward direction LM. In the direction LM this improved globe will project not only as much light as any transparent globe would project but I also some additional light refracted and re- Specification of Letters Patent.

. be more brightly illuminated.

Patented Dec. '7, 1915.

Application filed March 23, 1914. Serial No. 826,628.

general direction Ltd: will be further augmented by some diffused light from all the frosted portions visible from that direction. The belt when proportioned approximately as shown will give a greatly increased light at any angle from 5 to de grees below the horizontal. thus illuminating that part of the street between two lamp posts which would otherwise be poorly illuminated. To be effective the band B need only constitute from 5 to 10% of the total area of the globe so that the general effect will be that of a frosted light.

This improved globe may be safely used with a light of high candle-power, because the source of light will only be visible to observers who are looking diagonally upward from a certain considerable distance. Seen in this way the source of light will not be blinding, not only on account of the distance but because, as the inventor has observed, every light appears less blinding when seen against an illuminated background. jected inthe general direction LM will be softened by the admixture of a large per centage of diffused light.

The transparent band B is purposely extended only part way around the globe;

preferably one half to three quarters of its circumference. By suspending the globe so that the bright band B is turned toward the center of the street this invention will serve to protect residents on the same side as the lamp post from having direct light fall in their windows.

The band B shown in Fig. 1- represents paint applied on the outer surface of the globe along its upper margin. This paint which is optional is preferably white and translucent, and preferably baked on. The action of this paint which serves as a partial reflector is to reduce the light thrown upward and increase the light thrown downward, including some reflected light projected through the transparent band B.

The location of the light L is largely 0ptional. It is preferable to employ a light which will burn in a fairly stationary position within the globe. When L is located slightly below the. center of the globe it will project a little more light down than up because the lower. half of the globe will Such location of IA will permit alow position of B and permit a large part of the light re- Furthermore the direct light proover the greater portion of its surface and havinga relatively transparent band of relatively narrow width extending throughout more than half of its circumference, said band being positioned with its center line below the position of a source ofli-ght in the globe.

2. A globe for street lighting translucent over the greater portion of its surface and having a relatively transparent band oirelatively narrow width extending throughout more than half of its circumference, said band subtending an angle with respect to a source of light :in said globe which extends from substantially degrees to substantially degrees below the horizontal.

3. In construction of the class described, in combination, a source of light, a globe about'said source of light having upper and lower translucent portions, both visible in a horizontal direction, and a relatively tranparentiband of relatively narrow width between said translucent portions and extending below said source of light, whereby said band is exposed against a translucent background and. the rays emitted therethrough are augmented by those diffused by said translucent portions.

4.1 In constructionof the class described, in combination, a source of light, and a globe positioned about said source of light having upper and lower translucent portions visible from all sides and provided with a relativelytransparent band extending throughout more thanhalf its circumference and positioned to transmit a hollow cone of rays from said source of light, the uppermost ofwhiclrare at an angleof less than .45 degrees with the horizontal.

5. In a translucent globe for street lighting in combination a transparent belt below the centerloflthe globe and a doubly-frosted belt around the upper part of the globe.

6, In a translucent globe forstreet light ing frosted on the inside, a relatively narrow transparent belt below the center of the globe but located nearer to the middle than V to the bottom of theglobe, and an additionally, trostediband of less than one third of the height of the globe around the exter or of-the upper portion of the globe.

,7; A translucent globe for street lighting of uniform opacity throughout except for a horizontal band of lessopacit-y near its middle .andoa wider horizontal band of increased .opacity near its upper margin.

Signed at New York in the county 01 New York and State Of New Y ork this 21st dayof MarchA. D. 19

OTTO G. LUYTIES.

Witnesses:

HUNTLY A. JORDAN, Josnrn IQBRIEJN.

Copies of this patent maj be obtained for five cents each, xbyaddressing the mmis one -o n Wa hia e M1

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