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Publication numberUS2431091 A
Publication typeGrant
Publication dateNov 18, 1947
Filing dateJun 25, 1945
Priority dateJun 25, 1945
Publication numberUS 2431091 A, US 2431091A, US-A-2431091, US2431091 A, US2431091A
InventorsThomas Robert B
Original AssigneeThomas Robert B
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Multicolored electric flashlight
US 2431091 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


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ROBERT B. THoMAs Patented Nov. 18, 1947 i UNITED STATES PATENT oEFlcE 2,431,091 MULTICOLORED ELECTRIC FLASHLIGHT Robert B. Thomas, Wichita, Kans. Application June 25, 1945, Serial No. 601,363 2 Claims. (Ci. 177-327) My invention relates to a trafilc signal device and has for its principal object means for the illumination of a partially or totally translucent clear crystal body using same as a common medium for light oi' various colors within the spectrum, one or more colors being reflected into the body, separately or simultaneously to produce a desired color.

A further object is to provide a plastic body that may be illuminated by means of different colored electric light bulbs, selectively of any candle power by switch controls.

A still further object is to provide a plastic body illuminated by means of uncolored bulbs and the light waves filtering through any desired color or lter either attached to or separate from the base of the plastic body.

A still further object of this invention is to produce a structure embodying a casing for batteries, lamp sockets, and a light reiiective solid plastic body, the lamps being separated from each other by opaque sheets and a switch mechanism to selectively energize one of the lamps whereby a base color will predominate the light reflective body and by energizing other basic colors simultaneously is means to. effect a composite color, for example, to combine yellow and blue will produce green as the composite and such other composites will lie within the scope of this invention.

These and other objects `will hereinafter be more fully explained, reference being had to the accompanying drawing forming a part of this specication, and in which like characters will apply to like parts in the diierent views.

Referring to the drawing:

Fig. 1 is a side view ot the invention, partly in section for convenience of illustration.

Fig. 2 is a sectional view taken on line 2--2 in Fig. 1 wherein two light bulbs are involved and divided from each other, and showing colored translucent sheets of material to enclose said light bulbs that preferably are clear.

Fig. 3 is a similar view to that of Fig. 2, but modified to include four light bulbs that are likewise separately divided.

Fig. 4 is a side view of a cylindrical conductor for light rays longitudinally of the structure formed by reversed curvatures longitudinally of the structure.

Fig. 5 is a representation of a sign produced by light rays through a transparent body of such material as embodied in Fig. 1 with respect to its light reflective body.

Fig. 61s an edge view of Fig. 5, to illustrate one position of a light bulb for the reilective body.

As a more concise description of the invention it will be seen that a cylindrical element I is arranged to contain dry batteries 2 therein and being secured by a cap l having a helical spring I to tension the batteries toward the other end. Said other end is enlarged to form a head A and arranged for a plurality of light bulbs 5 and wire means 6 to connect the bulbs with the current of the batteries, each bulb having its respective tumbler switch 'I to make and break the current selectively with respect to bulbs and the said bulbs to threadedly engage in their respective reflectors 8 to intensify the light rays.

It will be seen that the upper portion of head A is threaded externally as at B to threadedly engage internally of a iiange 9, the upper extremity of which is arranged with an annular portion C integrally jointed to the ange and extending around a disc-like element I0 that is diametrically divided for simplicity of assembly and to receive an opaque partition I I between its inner diametrical edges whereby the light bulbs and their respective reiiectors are divided and the sides of the said disc-like element are of diierent colors and being secured to a transparent light ray conducting element I2 that extends upward in axial alignment with the cylindrical casing I, it being understood that the light ray conductor is of solid transparent plastic material, the external surface of which is made translucent by frosting or otherwise treating the same to avoid direct light rays outward therefrom as the same is diflused foran equal distribution of its illuminated condition when either or both light bulbs are energized, thek color of vihich being the same as filtered through the dscs.

To install or remove the light bulbs it will be understood that the conductor I2 and its respective disc-like elements I0 are removed from the head A by turning the ange independently of the light ray conductor as the said discs are secured to the conductor and closely engaging on each side of the opaque partition but being free to move upward therefrom during the time the flange is being unscrewed as the same is free to turn on the peripheral edge of the discs.

When four light bulbs are installed in the head, transversely crossing partitions I3 are arranged as shown in Fig. 3, is a modication from that shown in Fig. 2, otherwise the structure is the same.

A further substitution for the light ray extension is illustrated in Fig. 4 for ornamental designing purpose wherein a cylindrical element I4 is provide-d and having reversed curvatures, the surface of which is likewise frosted while the light rays are from a light bulb positioned at one end of the last said structure. Said plurally curved element may be clustered or otherwise for design purpose and being illuminated by a bulb at one end of the assembly. In this instance, an eicient supporting means for the lamp and said elements can be arranged but not shown in the drawings and the said plurally curved element may vary with respect to length and are of the curvatures to carry out some illuminated design as the light rays are conducted from end to end in like manner to the signalling device.

Further possibilities with respect to a transparent body with frosted surfaces may produce a sign as illustrated in Figs. 5 and 6, in this instance, a sheet-like element l5 is provided having one side frosted and the other clear with a lamp iii positioned in working relation to the clear side and being spaced therefrom so that the light rays from the lamp will illuminate the frosted side uniformly and on which is printed the sign as illustrated, for an example, this arrangement being appropriate for night exposure or where light is subdued.

A further modiication for the principle o o light projection may be, for example, applied tc a sheet of transparent plastic material having clear sides so that a sign may be placed` on one side by frosting the letters of the words only, in this instance the light should be indirect to illuminate the sheet uniformly whereby thev sign will stand out prominently and ci' a color desired but subject to the color of the lamp bulbs installed in the electric wiring; furthermore alternate colored bulbs may be arranged and a switch for each color to flash the same mechanically for attraction to the sign. @ne principle of indirect illumination would be to provide the equivalent or" an illuminent lamp placed a spaced distance from the edges of the sheet and being concealed from view by a suitable channel arrangement so that the light rays will enter at the edge to illuminate the sheet, and in case of a rectangular sheet body, said lamps may be of a different color for their respective edge and ashed accordingly or for a permanent duration of color selectively, and such other modifications may be made as lie within the scope of the appended claims.

Having fully described my invention what i claim as new and Adesire to secure by Letters Patent is:

l. 'in a traffic signal device, a cylindrical casing adapted to receive a source of electrical en ergy, a hollow head arranged on one end oi the cylindrical casing, a disc of insulating material to close the end of the cylindrical casing on which the hollow head is arranged, opaque partitions to sub-divide the hollow of the head, said partitions being seated on the disc of insulating material and upwardly extending therefrom and terminating a short distance above the head, whereby compartments are formed in the head, a transparent cylindrical body having fiat polished ends at right angle to the body, one end of which is grooved to receive the upper extension of said partitions removably, translucent elements differing in color and marginally formed to coincide with their respective spaces between the grooves in the end of the transparent body to permit seating of the upper edges of the opaque partitions in their respective grooves while the outer ends of the said translucent elements extend into an annular groove surrounding the upper extremity of the hollow head as securing means for the transparent body axial with the cylindrical casing, light bulbs and reflectors positioned in the compartments, wiring means to connect the bulbs with the source of electrical energy, and a separate switch for each bulb to energize the same, selectively, with respect to a signal color required.

2. In a traffic signal device of the class described, comprising a cylindrical casing to receive a source of electrical energy, a head ormed on one end oi the casing, the head cons an annular shoulder outwardly extendi right angle from the wall of the CasinY ing carried thereby and having a disc the annular shoulder to close the lo shoulder at its outer extremity i tending and being threaded es;

formed on the upper extremi disc-like translucent element havin portion extending into the channe i to close the upper end oi the head, the lucent disc being sub-divided diametr transverse relation to provide gaps in tl respondingly, opaque partitions seemed head to sub-divide the same inwardly to pro separate compartments, electrical bulbs placed in the compartments to extend light beams wardly and outwardly through the disc portions, selectively, as sub-divided, switches carried b3: the said annular wall in spaced relation to light bulbs placed in their respective compartments and wiring means to connect the bulbs to the said source of electrical energy, a transparent cylindrical body externally frosted while its ends polished to receive and emit light rays through the body, said body being vertically seated on the members of the said sub-divided disc and secured thereto by transparent adhesive substance.


' REFERENCES CETED r1he following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,448,353 Barany Mar. 13, 1923 2,092,664 Bray Sept. '7, i937 2,242,981 Pedersen May 20, 1941 2,340,530 Hefner Feb. l, 1944 n 2,362,131 Haggart Nov. '7, 194e 1,613,203 Shannon Jan. 4, 1927 1,661,785 Bruninga et al Mar. 6, 1928

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1448353 *Dec 21, 1921Mar 13, 1923Franco Electric CorpFlash light
US1613203 *Mar 30, 1926Jan 4, 1927James L ShannonFlash light
US1661785 *Feb 12, 1926Mar 6, 1928Hehey Hyeeaitevees
US2092664 *Nov 6, 1935Sep 7, 1937Lawrence L BrayIlluminated signal
US2242981 *Sep 14, 1939May 20, 1941Christian R PedersenIlluminated twirling baton
US2340530 *Jul 14, 1941Feb 1, 1944George D HefnerCombination traffic control and flashlight device
US2362131 *Dec 11, 1942Nov 7, 1944Signal Service CorpLuminous baton
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2486998 *Jun 19, 1948Nov 1, 1949Szeklinski Harry JSafety flashlight with interchangeably mounted sheath
US2554580 *Mar 13, 1947May 29, 1951Mors ElectriciteIndicating system
US2591269 *Aug 28, 1950Apr 1, 1952Lehoczki FrankSignaling wand for flashlights
US2606242 *Aug 25, 1950Aug 5, 1952Howard B MitchellMulticolored electric flashlight
US2611019 *Apr 13, 1949Sep 16, 1952Lake Erie Chemical CompanyMulticolored manual signal light
US2662224 *Aug 18, 1950Dec 8, 1953Howard B MitchellMulticolored electric flashlight
US2680844 *May 4, 1949Jun 8, 1954Smith Clayton HLens for flashlights and the like
US2760185 *Jul 28, 1954Aug 21, 1956Robert J SlavskySignaling device
US2784399 *Apr 23, 1956Mar 5, 1957Smith Thomas PSound producing fish lure
US2867916 *Oct 19, 1954Jan 13, 1959Bertram Michael LandemannApparatus for optically mixing colors
US2915744 *Mar 3, 1958Dec 1, 1959Lewis George PFlashlights
US3080553 *May 31, 1961Mar 5, 1963Gilbert E RaynorCombined flashlight and signal light device
US3113303 *Oct 27, 1960Dec 3, 1963Northern Ordnance IncTri-color indicator light
US3226864 *Oct 4, 1962Jan 4, 1966Kenneth M RehlerCharacter display
US3967274 *Oct 21, 1974Jun 29, 1976Howell Colvard WSignal light
US4779174 *May 8, 1986Oct 18, 1988Staten Carlton FSubmersible lighting device
US5537297 *Jul 21, 1994Jul 16, 1996Editha S. ShemkeImage reflecting light guide
US6799880 *Dec 31, 2001Oct 5, 20043M Innovative Properties CompanyIllumination device
U.S. Classification340/321, 40/555, 362/577, 340/815.67, 362/184, 362/242
International ClassificationF21L4/02, G09F21/02, F21V9/08
Cooperative ClassificationF21L15/02, F21L4/02, F21V9/083, G09F21/02
European ClassificationF21L15/02, G09F21/02, F21V9/08L, F21L4/02