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Publication numberUS748753 A
Publication typeGrant
Publication dateJan 5, 1904
Filing dateJul 8, 1903
Publication numberUS 748753 A, US 748753A, US-A-748753, US748753 A, US748753A
InventorsM. Eorff
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Max korff
US 748753 A
Abstract  available in
Images(3)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

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PATBNTED JAN. 5, 1 904. M. KORPE. ,ILLUMINATING BODY. AP PLIOATIUN PILED JULY 8. 1903.

3 SHEETS-SHEET 2 no MODEL.

PEYEHS no. FHOTCLUTHQ. WASHINGTON, o. q

PATENTED JAN. 5, 1904.

M. KORFP.

ILLUMINATING BODY.

APPLICATION FILED JULY 8-. 1903 N0 MODEL.

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Patented .ianuary 5, 1904.

UNITED STATES PATENT OFFICE.

MAX KORFF, OF HANAU, GERMANY.

lLLUMlNATlNG-BODY.

SPECIFICATION forming part of Letters Patent No. 748,753, dated January 5, 1904.

Application filed July 8, 1903. Serial No. 164,752- (No model.)

To all whom it may concern:

Be it known that I, MAX KORFF, a subject of the German Emperor, residing at Hanan, Germany, (my post office address being Hanau-on-the-Main, Germany,) have invented certain new and useful Improvements in Illuminating-Bodies, 05 which the following is a specification. v

The present invention relates to an illuminating-body which is suitable for any kind of illumination; and it essentially consists of a hollow body formed by a faceted metal frame into which glass prisms or pyramids are inserted. Illuminating-bodies of this general nature are already known; but from these the improved illuminatingbody is distinguished by the fact that instead of being provided with smooth glass prisms or pyramids, as was hitherto the case, grooved,step-shaped, split, or fluted cut-glass prisms or pyramids are used by which the efiect,-distribution, and efficiency of the light is considerably increased as compared with the said known illuminating bodies. The prisms or pyramids cut in the manner described can also be provided with one or more apertures of suitable cross-section in order that a certain proportion of direct-light rays will be emitted besides those distributed by the cut prisms or the like. The effect of the illuminating-body can by this means be further increased. In order to still further increase the said efiect, I provide the illuminatingbodies with mirrors or reflecting-surfaces outside the' prisms or pyramid-faces.

The annexed drawings represent various forms of cut-glass pyramids for'use with the improved illuminating-body.

In said drawings, Figures 1 and 2 are respectively a plan view and elevation of one form of body involving the invention. Fig. 3 shows a modification in the form of the pyramid and the manner in which the sides are connected to the frame. Fig. 4 is a plan of the same.- Fig. 5 indicates another form of reflecting-surfaces. Fig. 6 is a plan, and

Fig. 7 an elevation, of another form. Fig. 8 is a sectional View of another form; and Fig. 9 is a'plan view, partly in section, showing the arrangement of a group of pyramids in a frame.

Figs. 1 and 2 are a plan view and elevation, respectively, of a pyramid, the base a of which is provided with splits or grooves parallel with the pyramid-faces b b b By this means the rays emanating from the center of the hollow body. are deflected in such a manner that they emerge from the sides of the pyramid in the direction of the arrows c. This deflection of the rays renders the source of light invisible, which is a considerable advantage as compared with the illuminatingbodies hitherto known with which the source of light was visible notwithstanding the fact that it was inclosed. The fact of the source of light being directly visible is very injurious and troublesome to the'eye. The said splits or grooves also considerably facilitate and increase the passage of light through the glass prisms or pyramids even when the latter are very thick.

Figs.3 and 4 represent another form of pyramid, and Fig. 3 also indicates the manner in which the pyramids are inserted into the faceted metal frame, two adjacent triangles of which are connected together. The grooves or splits are in this case on the three faces I) b b of the pyramid, the base a, being completely smooth. The rays which fall onto the bases of the pyramid emerge entirely from these surfaces of the grooves which are parallel with the said bases, as indicated by the arrows c in Fig. 3. With this arrangement the same efiect and advantages are obtained as with the form shown in Figs. 1 and 2.

Each separate prism or pyramid is loosely inserted into one of the triangles d, forming the faceted metal frame and fastened in the said triangle by pressing the rods or bars 6 tightly against the faces I) 12 19 The triangles d are either soldered or connected together in some other suitable manner.

In the form of the pyramid shown in Fig. 5 reflecting-surfaces ff are provided on the three pyramid-faces b b b besides the faceted stepshaped or grooved splits for increasing the effeet and the passage of light. These reflecting-surfaces are arranged in any suitable manner at the lower parts of the three sides I) b b and on the three surfaces g g 9 formed by beveling the lower edges of the pyramid.

In order to allow direct rays, as well as diffused rays, to be emitted, and thus to considerably beautify the effect of the illuminatingbody, the prisms or pyramids can be provided with apertures of any suitable cross-section, through which light will be directly radiated.

Figs. 6 and 7 represent a pyramid with splits on its three lateral faces b b b and an aperture h, of triangular section, extending from the center of its base a to its apex. It is not absolutely essential that the aperture h should extend entirely through the pyramid. If the pitch of the pyramid is comparatively steep, it is sufficient for the bore to extend close to the apex, from which rays will then be emitted.

To allow of fixing the prisms or pyramids to the metal frame in a secure but simple manner and of conveniently attaching the reflectors or mirrors to the pyramids, the latter are preferably given the form shown in Fig. 8. In this case the base a of the pyramid is provided with splits or grooves parallel to the three pyramid-faces b 6 12 so that the rays from the source of light at the center of the hollow body are deflected in the known manner and emitted from the lateral surfaces 19 b b in the directions indicated by the arrows 0 in Fig. l. The lower part of the pyramid, near the base a, is provided with a flange i, which extends along the three sides I) b 19 By means of this flange 71 each pyramid can be very easily and securely set in a triangle d, Fig. 9, of the faceted metal frame by pressing the cross-bars e (shown in Figs. 3 and 9) of the latter tightlyagainst the flange 2' of each pyramid. The provision of the flange c' has the further important advantage that it facilitates the arrangement of the reflectors or mirrors for increasing the illuminating effect. These mirrors or reflectors can either be directly formed on the upper surfaces 11 of the flanges z' or on the inner surfaces of the cross-bars e of the triangles d, the said crossbars 6 being then folded over the entire width of the said flanges. This gives additional security to the fastening of the prisms or pyramids, since the flanges are completely embraced by the cross-bars. The securing of the pyramids or prisms is of course of great importance by reason of their considerable weight.

Fig. 9 is a section of one form of the illuminating-body, showing the manner in which the faceted triangles d are combined to form the frame which carries the prisms or pyramids.

The improved illuminating-body can also be so arranged that it revolves about the source of light or that the latter revolves in the hollow body.

I claim- 1. In an illuminating-body, the combination with a faceted metal frame, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having certain of their surfaces provided with splits or grooves, substantially as described.

2. In an illuminating-body, the combination with a faceted metal frame, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having their surfaces provided with cut splits or grooves, substantially as described.

3. In an illuminating-body, the combination with a faceted metal frame, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves and reflecting-faces or mirrors on certain of their surfaces, substantially as described.

4. In an illuminating-body the combination. with a faceted metal frame of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves and reflecting -faces or mirrors on certain of their surfaces, and being provided with apertures of suitable cross-section substantially as described.

5. In an illuminating-body, the combination with a faceted metal frame, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves on certain of their surfaces and being provided with apertures of suitable crosssection substantially as described.

6. In an illuminating-body, the combination with a faceted metal frame having crossbars, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves on certain of theirsurfaces and being provided with flanges adapted to be engaged and held by said cross-bars substantially as described.

7. In an illuminating-body, the combination with a faceted metal frame having crossbars, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves and reflecting-faces or mirrors on certain of their surfaces, and flanges adjacent their bases adapted to be engaged and held by said cross-bars substantially as described.

8. In an illuminating-body the combination with a faceted metal frame having crossbars carrying reflecting-faces or mirrors on their inner surfaces, of glass prisms or pyramids inserted into said frame, said prisms or pyramids having splits or grooves on certain of their surfaces, and flanges adjacent their bases adapted to be engaged and held by said cross-bars substantially as described.

9. In an illuminating-body the combination with a faceted metal frame having crossbars carrying reflecting-faces or mirrors on I In testimony whereof I have signed my IO their inner surfaces, of glass prisms 0r pyraname to thisspecification in the presence of midsinsertied into said frame, said prisms or two subscribing witnesses. pyramids having splits or grooves on certain 5 of their surfaces and being provided with ap- MAX KORFF,

ertures of suitable cross-section and with flanges adjacent their bases adapted to be Witnesses: engaged and held by the cross-bars aforesaid, FRANZ HASSLAGHER, substantially as-deseribed. MICHAEL VOLK.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4500947 *Nov 10, 1982Feb 19, 1985Perko, Inc.Tri spherical lens assembly
Classifications
Cooperative ClassificationY10S52/10, G02B3/0031, F21V5/00