USRE13600E - my gatt - Google Patents
my gatt Download PDFInfo
- Publication number
- USRE13600E USRE13600E US RE13600 E USRE13600 E US RE13600E
- Authority
- US
- United States
- Prior art keywords
- light
- prisms
- reflector
- shade
- rays
- Prior art date
Links
- 210000000614 Ribs Anatomy 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 239000012141 concentrate Substances 0.000 description 2
- 230000023298 conjugation with cellular fusion Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 239000005401 pressed glass Substances 0.000 description 2
- 230000021037 unidirectional conjugation Effects 0.000 description 2
Images
Definitions
- shade having a part acting as a reflector and an opposite part acting as'a lightdirecting, distributing o'r softening shade.
- the invention consists in a structure having av )'art,. usually about one-half its surface, covered with a specular surface, such as reflecting-prisms, constructed to reflect back into theshade a large portion of the light-rays which emanate within the reflector.
- the other side of the reflector-shade has on' its outer surface a series of light-d1- recting or distributing surfaces, such as prisms or ribs. which prisms direct the light in any desirable direction and at the same time soften the light-rays. ()n this directing side the interior surface of the shade may also be covered with diffusing-ribs,
- Figure 1 is a side elevation of a shade- .retlector embodying the principles of the present 'invelitiong-l ig. 2 is a vertical sec:
- Fig. 4 is a broken horizontal section at the rear side of the shade-reflector"
- Fig. 5 is a broken horizontal section at the front slde of the shade-reflector in any plane in which the prisms appear.
- Fig. 7 is a side elevation of a further modification
- Fig. 8 is a rear elevation of Fig. 7
- Fig. 9 a broken section on line .2- z. y
- My shade-reflectors are made of pressed glass and in all.co1nmon sizes are in a single piece. That side A-of the body of. the structure which'is to act as a specular reflector 'may be substantially. covered by external prisms B. These prisms areof the character, termed by me doiible-refiectingi prisms thatis, the light from within the reflector encounters a smooth interior surface K and is deflected very little or not at all tl1ereby. Passing to the outer inclined face of a prism-B a light-ray encounters this face at an angle of forty-five degrees, (for best results).
- the ray is reflected'at a right angle directly across the prism and strikes the second.- inclined face also at an angle of fcrty-fiye degrees, thereto, (see Fig. 4,) ,wherein 1 2 indicates alight ray thus reflected twice.
- the light-ray is thus returned on a' line substantially parallel with its line of radiation.
- This direction of a light-ray may be somewhat modified by the form of the body, as at 3 4, Fig. 2.
- the shade-refiectors are shown in vertical position in. Figs. 1 and 6, but can be turned to any position desired.
- the specular reflecting surfaces which are here illustrated in the form of prisms will be described in the positions they occupy when the reflector-shades are in the position of Figs. 1 and 6.
- the. prisms B extend in genc1ally vertical direction with reference to the body of the shade-reflector.
- the.reflecting-prisms are substantially in the form of lanes.
- the front or light-diffusing side C of the shade-reflector is preferably covered internally with small vertical or lunar prisms or ribs D. These internal prisms will not reflect the light back toward its source, but
- the surfaces not be planes, but may be merely rounded flutings for this purpose.
- the amount of light received by the front face C or shade .part of the. device will be something less than twice the amount which-would be-theie received were the-reflector part. of the device v l [10 i rays. Y
- the outer surfsceof the shade C is substam tially eovered with light-directing surfaces, preferably horizontal directing or distributing surfaces, such as prisms E..
- prisms E. are of various characters, according to the ill'nminaltions desired. These prisms may be single-reflecting prisms or light-db recting prisms and. do not reflect light to any considerable extent back into the interior of the shade-reflector, but direct the rays in calculated. directions or in all direcs tions.
- the upper prisms-seyfor one-fourth the height of thesliade-snay be made to direct the ligl1t-rays ln'a direction inclined downwardly at a considerable angle.
- the prism along the central part of the face C may be made to direct the rays rlownwsrdly at a lesser angle, and part of the face C may be made to direct the rays about horizontally.
- Such directions 'for li lit-rays are indicated by'lines 6, 7 8,9 l Fig.3.
- Such an arrangement for prisms will give a concentration of light along a horizontal band near the. shade-face.
- constrnction'of the prisms B may be made to concentrate therays or to diffuse tliem, as desired.
- the dirooting-planes of these prisms are deter mined by the mold, which is made on care fully-calculated lines.
- the reflector-shade a. portion A Whicli reflects light interiorly across the reflector shade. It has also 2. transmitting" portion C, transyersely-distributive of light, which transmits the light reflected across the (levice out through ⁇ using or directing-portion.
- probthe plane transverse (lifably the best results are secured by using double-reflecting prisms of about' fi specular reflecting portions are meant surfaces having opproximatelylzotsl eficcb ing properties.
- the &onble -reflecting prisms herein described are cxarnples of such speelllar surfaces.
- a reflector-shade for she asymmetric distribution of light in straight parallel inclosure ha ving upon one skis a prismatic re Hector-portion and uponnthe other side a series of asymmetric light clistriblitii' g ribs lying in 'parallel planes transversely cross mg substantially at right angles the body of signature orrs A. Mrs-Arr.
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