Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1824859 A
Publication typeGrant
Publication dateSep 29, 1931
Filing dateMar 31, 1930
Publication numberUS 1824859 A, US 1824859A, US-A-1824859, US1824859 A, US1824859A
InventorsWatson H. Woodford
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Color display apparatus
US 1824859 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

P 1931- w. H. WOODFORD 1,824,859

COLOR DISPLAY APPARATUS Filed March 31, 1930 a lllllllllllilmmma 4 IN VENTOR Wu lsmafiIVoodford fiamiifiw Y WM,


Patented Sept. '29, 1931 PATIENT OFFICE WATSON H. 'WOODFOBD, OF BRIDGEPORT, CONNECTICUT COLOR DISPLAY APPARATUS v Application filed March 31, 1980. Serial No. 440,220.

The present invention relates to a color display apparatus, particularly for use in connection with a radio receiver or microphone, the object being to provide an apparatus by means of which color sensations will be produced in synchronism with sound sensations. The arrangement of colors will preferably be such that soft, harmonious, slowly changingcolors and color blendings will be displayed with the softer modulated tones, while vivid colors and less harmonious blendin'gs are displayed with the louder and more intense tones, the range between being accompanied by colors and blendings designed to be most in keeping with the character" of the sound. It is proposed in the present embodiment to take a small percentage of the amplified impulse current from a radio receiving set, or microphone, uti- '20 lizing the gradations of the current to actuate a suitable color screen.

Other objects are to provide a device which will be simple in construction and rep liable in operation, and may be readily con- 26 nected to a radio receiver, microphone, or

other ap aratus with which it is to be used.

With t e above and other objects in'view, an'embodiment of the invention is shown in the accompanyin drawings, and this em- 3o bodiment will be ereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings:' Fig. 1 is a plan view of the color display apparatus, according to the present embodiment of the invention.

Fig. 2 is a rear elevation. Fig. 3 is a detail sectional view of the '40 mounting for the rotating drive member em loyed.

ig. 4 is a detail sectional view of the mounting for the color screen employed.

Fi 5 is a detail elevation of the mounting 45 for t e eIectro-magnet employed. 7

7 Similar reference characters indicate corresponding parts throughout the several figures of the drawings. Referring to the drawings, the apparatus, 60 according tothe present embodiment of the invention, comprises a frame consisting of a base 10, vertical uprights 11 and 12 at each end and front and rear cross bars 13 and 14 extending between and supported upon the upper ends of the uprights.

A fixed stud shaft 15 is mounted centrally in the bar 14, andhas a rotary drive member 16 mounted thereon, this member having a laminated soft steel ring 17 mounted on its face and provided on its hub with a worm gear 18. A small electric motor 19 is mounted upon an inclined support 20 secured to the base 10, its shaft 21 bein journaled in a bearing 22 hung from the bar 14 and provided at its end with a worm 23 meshing with the worm gear 18. The rotary drive member is adapted to be constantl driven and, by means of a magnetic clutcfi means, hereinafter more fully described, to drive the color screen. The motor may be supplied with current from any suitable source and controlled by a rheostat to give the desired constant speed to the rotary drive member.

The color screen which is adapted to have movement imparted to it by the rotary disk member 16, hereinafter referred to as the power ring, is mounted upon a shaft 24, coaxial with the power ring and having cone bearings 25 and 26 at its ends engaged in sockets 27 and 28, provided respectively in the inner end of the stud shaft 15 and in a cylindrical bearing block 29, adjustably secured in an opening in the bar 13 by means of a set screw 30.

A screen carrying disk 31, of insulating material as hard rubber, has its hub 32 secured upon the shaft 24 by a set screw 33, the circular screen 34 being secured upon the face of the disk by means of a clamping ring 35. The screen is of transparent material and has a series of colored segments arranged in such relation that as it is rotated from a given position the desired colors will be successively brought into the focus line of a beam of light. This beam of light is supplied by an electric lamp 36 mounted on the bar 14 and after passing through'the screen is. diffused by a suitable extended through passages inthehub 32 i to a high resistance electrO-magneteG, re?

silient-ly mounted upon 'a pair of spring arms 4'1 and l8 mounted upon a- ;block 49 secured to the face of the disk 31. .The end of the magnet is at a minimumdistance from the armature or power ring,- so.that the magnetizing power; is directly'proportional to the magnetizing current,

- counter weight 50 secured upon the disk 31 in diametricallyopposed relation to the magnet balances theweight of the magnet. The laminated structure of thepower ring reduces the effect of reluctance residual magnetism and eddy currents.

The screenis normally maintained in a given or zero position :by means of an arm 51, adjustably secured upon the shaft 24 bymeans f of .aset screw 52, and pressed against a stop arm.53 secured to the bar 13 by means of a .coil spring 5a wound about the shaft, and having its ends connectedto the hub of-the arm 51 and to theiadjustable bearing block 29. By rotaryadjustmentof the block29 the tension of thespring may be increased ordecreased as desired, The adjustment of the arm 51 permits any dosiredportion of the screen to be placed in the focus line of the lampin the normal. or zero position; I

lhe operationis as follows:

. The'power ring is set in motion, and as the pulsating current from theiradiovreoeiver or microphone energizes the high resistance electromagnet it. grips thetpower ringend-isdrawn with itagainst'the force of the coil spring 54 to, a. point: where the magnetizing force equalizes thezspring resistance As the current decreases or increases in intensity the color. screen either moves back toward the zero position under the action ofathe spring or advances toward the", limit of rotation, which is determined by engagement of the arm '51 with the under side of th'estop arm 53. In this man,- nerthe complete range of. colors and color blendings are displayed in synchronism with the s'ound range. The tensionof-the springisadjustable to give variousfltensions,

and asthe tension increases proportionately as the screen moves from zero position greater current intensity or magnetic energ The rings 37;

is required for the same time period of movement as the dlstance ncreases from the zero position. 7

It will be understood that any suitable arrangement of colors may be employed. For example, the screen may comprise three sections, the first sectionhaving soft and harmonious colorblendings to correspond to the soft tones of lnstruments or voice, the second section having more pronounced colors and blendin aand the third section,

having vivid colors and less harmonious blendings'inkeeplng wlththe louder and .more intense sound impulses.

T have "illustrated and described a preferred and satisfactory embodiment of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof, as defined in the appended claims. I

Having thus; described my, invention what I claim and desire {to securebyLetter-sPatcut is 1 1. Ina deviceof the character described,

a. rotatable color; displayf' disk, variable drive means for I rotating said disk ,to ,a greater or less extentand means for returning the disk to normal position when released'frointhe drive. a

2. In a device of the character described,

a movable color display element, variable drive means for moving said display element to a greater or lcssjextent, and means exerting a force on said display element in opposed direction to said driving element and adapted tobe overcome in varying de grees by said variable drive means.

3. p In a. device of thecharacter described, a movable color display element, an-electromagnet adapted to have a current of varying. intensity passed ftherethrough, and means associated with said magnet adapted to move said display element to an extent proportionate to said current. I i

4;. In a device of I hecharacter described, a movablecolor display .elemenaa driving element, an electro-magnetic clutch; acting between them and means to actuate the ele-v ment in opposite direction; when released by of. varying intensity passedv therethrough,

means adapted to exert a force on said display element in opposed direction to said driving element, and means for varying the force of said last mentioned means.

7. In a device of the character described, a rotary color display element, a rotary driving element coaxial therewith, an electromagnet carried by said display element and adapted to connect it to said driving element and further adapted to have a current of varying intensity passed therethrough, and means adapted to exert a force on said display element in opposed direction to said driving element.

8. In a device of the character described, a movable color display element normally occuping a predetermined position, variable drive means for moving said display element to a greater or less extent from said predetermined osition, and means adapted to return said display element toward said predetermined position to a greater or less extent in opposition to said variable drive means.

9. In a device of the character described, a rotatable transparent, variably colored disk, means for reflecting light through the disk, drive means for rotating said disk, an electromagnetic clutch acting between the drive means and the disk for rotating the latter in one direction, and means connected with the disk for rotating it in a direction opposite to that of the drive when released by the clutch.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 29th day of March A. D. 1930.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2740899 *May 6, 1952Apr 3, 1956 cummings
US4814800 *Mar 16, 1988Mar 21, 1989Joshua F. LavinskyLight show projector
U.S. Classification84/464.00R
Cooperative ClassificationA63J17/00