US738707A - Colored-light projector. - Google Patents

Description

PATBNTED S3218, 19031 zwu/a v s P. VAN NORT. COLORED LIGHT PROJECTOR.

APPLICATION FILED NOV. 12, 1900. I0 KODBL.

' tended to be thrown on the object to be illumithe opaque screen B. has'a hole in its center of vproper size to make UNIT D STATES lPatented September 8, 190 3.

PATENT), OFFICE.

COLORED-LIGHT PROJECTOR.

- SPECIFICATION forming part of Letters was No. 738,707, dated September 8, recs.

Application filed November 12, 1900. Serial No. 36.312- (Ko model.)

To all whom, it may concern:

Be it known that. I, STERLING PRICE VAN NORT, of the city of St. Louis, State of Missouri, have inventeda new and useful Colored-Light Projector, of which the followin g is a full and clear description.

The object of my invention is to provide a machine by the use of which an object -such as a fountain of water, a dancer, a scene on the stageor elsewhere,&c.-maybe artificially illuminated with manydiiferent colors and tints one after another.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both figures.

Figure 1 is a side elevation of the machine with a section broken away, illustrating the general arrangement of all the parts. Fig. 2 is a face elevation of the end of the machine looking toward end of shaftC and source of nated. This color-support has a hole in its center and is clamped immovably on the shaft 0, against the hub D, by means of the washer L and nut J, which latter is screwed onto the thread ut in the shaft 0.

B represents an opaque screen which has a section or sectionscut out of it to correspond to the arrangement of the colors on the colorsupport A. The nut J has a thread cut on its outside surface for part of its length, the other part being left blank to form a bearing for The opaque screen B an easy fit on the blank part of the nut J. The screen is pressed into its place against washer L by means of the spiral spring M and lock-nut K. The opaque screen B has a small wing N attached to its surfa'ce. This wing is preferably made of some thin soft metal, so

that it maybe bent to any angle desired relative to the surface of the opaque screen B, so that it will catch more or less air when the screen B rotates, thus having a more or less retarding effect on the speed of the screen B. This retardation may be also increased or di-. minished by altering the pressure on the spiral spring M by means of the lock-nut K.

G represents a projecting-lantern surrounded by the opaque shell H, containing a powerful electric, calcium, or other source of artificial light, so arranged to throwstrong parallel beams of light through the trans parent color-support at 1. The whole machine is placed in such a position that theresultant light is directed toward the object to be illuminated. 1

In Fig. 2 the transparent color-support A is represented by the lines 0 0 as divided into four equal sections. To each of these sections a different color is applied. Theyare marked in the figures l, 2, 3, and 4 and are inthis instance sup poi; '1 to be red, blue, orange, and white. In ti: position shown in Fig. 2 the light passes through the number 1 section of the transparent color-support A continuously if the latter was standing still and intermittently if it was rotating. By rotating the shaft 0 at high speed as long as the screen B and the color-support rotate at the same speed and retain the same relative position the resultant lightwill be red but as the screen B is not perfectly tight on the shaft the action of the wing N will be to cause the screen B to fall behind the speed of the shaft 0 and colorsupport A. By adjusting the wing N and the compression of the spring M the retardation of the screen maybe regulated so that a gradual change from one color or colors to another color or colors may be thrown, and this change will include all of the different shades or tints produced by a blending of the colors under change in any proportion, according to the relative position of A and B and the amount of surface of each color exposed. For instance, let the color at first be red, If the shaft is rotating, as shown by arrow, and the screen B falls behind a little in speed, it will exposca sinall part of the blue section and cover an equal part of the red. This small space of blue will be blended into the red which gether.

is left exposed, and the resultant color will! be a shade or tint which will correspond to the most endless number of colors and tintsmay successively be thrown on the object.

It is obvious that the position of therefore and number of colors or tints may be varied or the color-machine can be varied or modi fied and obtain practically the same object-or result, and the right is hereby claimed to so modify the whole or part of the machine to suit conditions, colors wanted, &c. 1

I claim- I 1. In a color-projecting lantern, a disle shaped opaque screen placed between the source of light and the object to be illuminated having a center adapted to form a free hearing on a cylindrical axis, said screen having transparent sections in its periphery and an air-wing fastened and set at an angle to the face of the screen, intended to havea retarding effect when the screen is rotated.

2. In a colorprojecting lantern, a disk shaped color s upport or screen placed between the source of light and the object to-be illuminated, carrying a plurality of the primary colors respectively, mounted on an axis with suitable bearings and means for rotating the disk continuously in combination with an opaque sectional screen, mounted loosely on the same axis, against the face of the colorsupport, being held in place by a compressionfor the purpose of retarding the speed of the opaque screen and therebychanging automatically the relative position of the colorsupport to the opaque screen, as described.

STERLING PRICE VAN NORT.

Witnesses:

E. P. PEERS,. HANNAH M. Hosm.

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