US1718560A - Floodlight - Google Patents

Description

June 25, 1929. H. P. HOLLNAGEL FLOODLIGHT Filed D60. 8, 1925 Inventor;- /1'erbef-Z: PHO/Magd #tto/"Ney 'a fountain the glass is vvery li .rimes .im 25, `1929.

UNITED `STATES PATENTf OFFICE.

HERBERT l. HOLLNAGEL, 0F SW-AIPBCOTT, IASSACHUBEITS, ASSIGNOBTO Gm n rIELEGTBIC COMPANY, A CORPORATION' 0l' NEW YORK.

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applicativa mea ummm s, 192s. semi no. 74,155;

My invention relates to improvements in Hood lights. More particularly the invention relates to Hood li hts in which the character of the beam is canged-by causing it to pass through suitable means such as so-called color or absorbing screens.

My invention is particularly adapted for use in the illumination of fountains, for example. p Ordinarily the glass door of a Hood lightingjdevice becomes quite hot when the light is turned on. While in this condition, ifeold water is allowed to fall ulpon it as from ely to crack. This is particularly true in the case of colored glass. It is one of the objects of my. invention toprovide a Hood lighting device free from this objection. It is an object to provide a Hood lighting deviceY of the kind described in which instead of the usual Hat or upwardly bulging'or convex gllass a concave g lass is arran ed to receive an hold water so t at if the lig t is turned on before the fountain water begins to fall the glass will not become overheated.

The invention will be more fully understood from the following specification and by reference to the accompanying drawing in which Fig. 1 is an elevation of a section of the Hood lighting unit of in? invention; Fig. 2 is a perspective drawing o the color screen with portions broken ofi to more clearly illustrate Vthe construction; Fig. 3 is a section through the color screen. Y,

Referring more in detail to the drawing, it will be seen that the Hood light comprises a reflecting element 2 which may be a surface of revolution of any suitable form, such as parabolidal, heperbolidal, or the like. This re- Hector may supported in any suitable mann'er. Upon the rim of the reflector there is supported an annular frame 3 upon which rests a concave transparent or translucent glass closure 4 adapted to serve as a basin for a volume of water 5. ThisA glass 4 and the water 5 form a composite lens. Below this lens andl located within the focal region of the reflector 2 there is located a source of light v 1 which may be of any suitable character such mayl be modified by merely having the composite lens 4 and 5. The screen 6 ma Abe either transparent or translucent. 'ly'his screen is of a suitable character. The rays of light emanating from the device will ass through the `screen and emerge thererom with a spectral composition and ene distribution quite different from that originally emitted from the incandescent filament.

By referring to Figs. 2 and 3 it will be Seen that the screen consists of a pair of glass plates I and 9 holding between them a layer of colored transparent material8 which acts not only as a screen for the light, but may serve also as an adhesive to firmly hold the two glass platesv together. Under heat-and p ressure the glass plates andthe colored medium ma vbecome practically inte l with one anot er.- This construction, owever,

absorbing material laid between the two sheets of glass after `which the edges of glass may be covered with a `coat of water-proof material 10 to prevent the disintegration of thecolor absorbing substance. As aA water-.proofing material, rubber, bakelite,'collasta, marine luetar and the like may be used. It will understood that the color screen may consist of a number of Yunits similar to that shown in Fig. 2 placed one u n the other. These units when constru asdescribed `are very strong. Y

As a base for the color absorbing medium,

bakelite, collasta, urea-resin or any condensation roduct which has been` pro may utilized. Gelatine or uloee oompoilnds may also be utilized. f

lines 11v water falling from afountain, for example. As the 'water impinges upon the screen 6 it Hows 0H and trickles into the con cave basin 4. In order to insure thatA the water shall How from the screen into the basin the holder of the scr n is provided with a Han e 12. In the marginal region of the holcr a series of openings 13 only one of which is shown, is provided. erefore, as the water runs ot of the screen it passes through the openings 13 into the basin as indicated in Fig. 1, by the stream 14. After the water has once collected in the glass 4 the source of liglrt may be allowed to run even before the fountain is turned on without much danger of either the lass 4 or the glass lates 7 and 9 being bro en by the cold water alling upon it.

ly dried Fig. 1v I have represented by the dotted i of the invention or from the scope of the- With the arrangement described very little heat will pass through to the plates of the color screen. The same is true with respect to the ultra-violet rays. This is due to the fact that the water 5 absorbs the energy from both the infra-red and ultra-violet regions of the spectrum. More particularly is this true of that portion of the infra-red region of the spectrum in which the resulting energy effects are a maximum.

While I have illustrated my invention in connection with a specific form of device in compliance with the requirements of the patent statutes, it Will be understood that. in view of the disclosure, variations may be readily carried out without departing from the spirit claims herein.

What I claim as new and desire to secure by Letters Patent of the United States, is: v

1. A lood light comprising a light source, a housing for the light source, an opening in said housing over the light source, a transarent basin located in said opening for holding water and for allowing light from the light source to pass through, a color screen llocated over said basin for coloring the light that passes through said basin, said Screen elements being all assembled in order along a common axis whereby when a light source is located in front of the reiector a beam may be projected from the reflector thro h said container and said screen and wheiiegb the screen may be protected from damage ue to heat from the light source.

In witness whereof, I have hereunto set my hand this thirtieth day of November, 1925.

HERBERT P. HOLLNAGEL.

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