US2365864A - Means of illuminating telephone dials, etc. - Google Patents
Means of illuminating telephone dials, etc. Download PDFInfo
- Publication number
- US2365864A US2365864A US436152A US43615242A US2365864A US 2365864 A US2365864 A US 2365864A US 436152 A US436152 A US 436152A US 43615242 A US43615242 A US 43615242A US 2365864 A US2365864 A US 2365864A
- Authority
- US
- United States
- Prior art keywords
- light
- dial
- plastic material
- illuminating
- telephone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Definitions
- This invention relates to illuminatingv telephone dials, radio dials, pressure indicators, speed indicators, or other types of indicating instruments,
- This lllumination is obtained by projecting light from a small electric lamp into the inner mass ofthe clear transparent plastic material, or other characteristic material, hereinafter referred to as plastic material, which is placed directly over the face of the instrument, or sub- .stituting the plastic material forthe engraved dial of the instrument and by means of having the engraving appearing on the plastic material.
- This invention makes use of the fact that the plastic---material will in turn transmit the light throughout its entire mass, making the characters engraved on the face of the dial or instrumentclearly visible.
- Figure l is a plan view of a telephone dial to which my invention is applied;
- Fig. 2 is a transverse sectional view taken on line'2-2 of Fig. 3 and illustrating in plan the device of my invention applied to a telephone dial;
- Fig. 3 is a sectional' view taken through the device of my invention as applied to a telephone dial substantially on line 3-3 of'Fig. 1;
- Fig. 4 is a sectional view through the device of my invention showing the construction of the device for general application to dials for various instruments;
- Fig. 5 is a theoretical diagram showing the system of light distribution provided by the device of my invention applied to dials of various arrangements.
- reference character a represents a disc orring of plastic material, this ring of plastic material is the subject of this invention.
- Reference character 2 designates a thin film or layer of blue tinted plastic (with a small section'cut away in Fig. 5 to indicate its presence) glued, cemented or vulcanized on the entire surface of the face of the plastic ring i to further prohibit undesirable light outside the instrument and still permit the engraving on the dial to be clearly visible.
- Reference character 3 designates a circular opening to permit that part of a telephone dial which extends above the dial number plate to extend through the plastic material to allow it to fit evenly and flush with the dial plate.
- Reference character d indicates a smaller opening in the plastic.
- Reference character t designates a small metallic or non-transparent plate to fit over opening t to prohibit direct light from the lamp being projected outside the instrument.
- Reference character i indicates two small pins permanently mounted on plate t to facilitate mountii'ig the plate upon the plastic material. These small pins are slotted on their outer end to provide a tension on the walls of holes 5, which are drilled in the plastic material 2! on either side of opening t to hold the plate t in place.
- the plate 6 is mounted in such manner to enable the lamps to be easily replaced.
- the walls of the circular opening 3 and the outside walls of plastic material 5! as indicated in Fig. 4, at reference character 8 are-treated to prohibit undesirable light from escaping from the plastic material at these points.
- Fig. 4 is a cross sectional view of'Fig. 1 showing the light distribution device of my invention adapted for general application to dials of various descriptions. ihe device is toroidal in shape and will readily lit with one face thereof directly against the dial.
- the light reflective surfaces 8 are applied to the inner and outer peripheral edges of the device as heretofore explained and a light modifying film or layer 2 is provided over the opposite face of the device as heretofore ex-' plained.
- Figs. 1, 2 and 3 illustrate the use of this invention in connection with a telephone dial
- the letters in the illustration referring to various parts of the dial are used to clarify the illustration and are not a part of the invention, but the figures used to identify various parts of the illustration are a part of the invention.
- Letter A, Fig. 3, designates the shellor case of a telephone dial
- letter B designates the dial plate which carries the engraving identifying the steps of rotation of the finger wheel C
- letter D designates a small electric lamp projecting through a hole cut in-the dial plate to coincide with the opening 4, Figs. 3, 4, 5, to act as an illuminating medium.
- Letter E designates the rotating shaft of the dial upon which the finger wheel C is mounted. In Fig. 2 the finger wheel is omitted to better show a faceview of this invention as used with a telephone dial.
- Fig. 3 the plastic material is identified by reference character I, the necessity of the opening identified as number 3 in Fig. 2 is clearly shown.
- Fig. 3 shows the lamp opening number 4 and the cover plate number 6 as being located under that portion of the finger wheel where no finger, hole punchings appear.
- the lamp D derives its operating current directly from the telephone line and becomes lighted as the telephone receiver is taken from the switchhook and remains lighted as long as the receiver is oil the switchhook.
- Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a fiat ring of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial, a light modifying film extending over the opposite face of said ring, light opaque means extending over the inner and outer edges of said ring, means extending through a portion of said ring for introducing light rays into the body of said plastic material, and a cover member engageable with a portion of said flat ring for obstructing direct emanation of light rays from said ring.
- Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a toroidal member of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial. alight modifying coating on the opposite face of said member, light reflecting means covering the inner and outer peripheries of said member, a light source extending through a portion of said member for illuminating the interior of said member by disseminating light rays through said member by reflection from said light reflecting means, and a cover for housing said light source removably engaging a portion of said toroidal member.
- Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a toroidal member of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial, a light modifying coating on the opposite face of said member, light reflecting means covering the inner and outer peripheries of said member, a light source extending through a portion of said member for illuminating the interior of said member by disseminating light rays through said member by reflection from said light reflecting means, and a disc-like light opaque device removably engageable with a portion of said toroidal member for confining the light rays from said light source to the body structure of said toroidal member.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Description
Dec. 26, 1944. H. E. CHAPMAN MEANS OF ILLUMINATING TELEPHONE DIALS, ETC
7 Filed March 25, 1942 C ATTORNEY 7 ,Patented 26 1944 Y UNITED MEANS OF ILLUMINATIN G TELEPHONE DIALS, ETC.
3 Claims.
This invention relates to illuminatingv telephone dials, radio dials, pressure indicators, speed indicators, or other types of indicating instruments,
-where illumination is not sufficient for proper visibility, by means of using a clear transparent plastic material or other characteristic material,
as a light transmitting medium without projecting undesirable light outside the instrument itself.
This lllumination is obtained by projecting light from a small electric lamp into the inner mass ofthe clear transparent plastic material, or other characteristic material, hereinafter referred to as plastic material, which is placed directly over the face of the instrument, or sub- .stituting the plastic material forthe engraved dial of the instrument and by means of having the engraving appearing on the plastic material.
This invention makes use of the fact that the plastic---material will in turn transmit the light throughout its entire mass, making the characters engraved on the face of the dial or instrumentclearly visible.
My invention will be more fully understood from thespeciflcation hereinafter followin by reference to the accompanying drawing in which:
Figure l is a plan view of a telephone dial to which my invention is applied; Fig. 2 is a transverse sectional view taken on line'2-2 of Fig. 3 and illustrating in plan the device of my invention applied to a telephone dial; Fig. 3 is a sectional' view taken through the device of my invention as applied to a telephone dial substantially on line 3-3 of'Fig. 1; Fig. 4 is a sectional view through the device of my invention showing the construction of the device for general application to dials for various instruments; and Fig. 5 is a theoretical diagram showing the system of light distribution provided by the device of my invention applied to dials of various arrangements.
In the drawing, reference character a represents a disc orring of plastic material, this ring of plastic material is the subject of this invention. Reference character 2 designates a thin film or layer of blue tinted plastic (with a small section'cut away in Fig. 5 to indicate its presence) glued, cemented or vulcanized on the entire surface of the face of the plastic ring i to further prohibit undesirable light outside the instrument and still permit the engraving on the dial to be clearly visible. Reference character 3 designates a circular opening to permit that part of a telephone dial which extends above the dial number plate to extend through the plastic material to allow it to fit evenly and flush with the dial plate. Reference character d indicates a smaller opening in the plastic. material l to permit a small electric lamp D to extend to or through the plastic material I The wall of this opening t is highly polished to permit all the light possible to be admitted to the inner mass of the plastic material l. Reference character t designates a small metallic or non-transparent plate to fit over opening t to prohibit direct light from the lamp being projected outside the instrument. Reference character i indicates two small pins permanently mounted on plate t to facilitate mountii'ig the plate upon the plastic material. These small pins are slotted on their outer end to provide a tension on the walls of holes 5, which are drilled in the plastic material 2! on either side of opening t to hold the plate t in place. The plate 6 is mounted in such manner to enable the lamps to be easily replaced. The walls of the circular opening 3 and the outside walls of plastic material 5! as indicated in Fig. 4, at reference character 8 are-treated to prohibit undesirable light from escaping from the plastic material at these points.
Fig. 4 is a cross sectional view of'Fig. 1 showing the light distribution device of my invention adapted for general application to dials of various descriptions. ihe device is toroidal in shape and will readily lit with one face thereof directly against the dial. The light reflective surfaces 8 are applied to the inner and outer peripheral edges of the device as heretofore explained and a light modifying film or layer 2 is provided over the opposite face of the device as heretofore ex-' plained.
Figs. 1, 2 and 3 illustrate the use of this invention in connection with a telephone dial, the letters in the illustration referring to various parts of the dial are used to clarify the illustration and are not a part of the invention, but the figures used to identify various parts of the illustration are a part of the invention.
Letter A, Fig. 3, designates the shellor case of a telephone dial, letter B designates the dial plate which carries the engraving identifying the steps of rotation of the finger wheel C, letter D designates a small electric lamp projecting through a hole cut in-the dial plate to coincide with the opening 4, Figs. 3, 4, 5, to act as an illuminating medium. Letter E designates the rotating shaft of the dial upon which the finger wheel C is mounted. In Fig. 2 the finger wheel is omitted to better show a faceview of this invention as used with a telephone dial.
In Fig. 3 the plastic material is identified by reference character I, the necessity of the opening identified as number 3 in Fig. 2 is clearly shown. Fig. 3 shows the lamp opening number 4 and the cover plate number 6 as being located under that portion of the finger wheel where no finger, hole punchings appear. The lamp D derives its operating current directly from the telephone line and becomes lighted as the telephone receiver is taken from the switchhook and remains lighted as long as the receiver is oil the switchhook.
What I claim and desire to secure by Letters Patent 01 the United States is as follows:
1. Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a fiat ring of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial, a light modifying film extending over the opposite face of said ring, light opaque means extending over the inner and outer edges of said ring, means extending through a portion of said ring for introducing light rays into the body of said plastic material, and a cover member engageable with a portion of said flat ring for obstructing direct emanation of light rays from said ring.
2. Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a toroidal member of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial. alight modifying coating on the opposite face of said member, light reflecting means covering the inner and outer peripheries of said member, a light source extending through a portion of said member for illuminating the interior of said member by disseminating light rays through said member by reflection from said light reflecting means, and a cover for housing said light source removably engaging a portion of said toroidal member.
3. Means for illuminating a dial comprising a circular dial having an annular row of identifying characters carried thereon, a toroidal member of light distributing plastic material having a light transmitting face positioned adjacent the annular row of identifying characters on the dial, a light modifying coating on the opposite face of said member, light reflecting means covering the inner and outer peripheries of said member, a light source extending through a portion of said member for illuminating the interior of said member by disseminating light rays through said member by reflection from said light reflecting means, and a disc-like light opaque device removably engageable with a portion of said toroidal member for confining the light rays from said light source to the body structure of said toroidal member.
HARRY EDWIN CHAPMAN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US436152A US2365864A (en) | 1942-03-25 | 1942-03-25 | Means of illuminating telephone dials, etc. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US436152A US2365864A (en) | 1942-03-25 | 1942-03-25 | Means of illuminating telephone dials, etc. |
Publications (1)
Publication Number | Publication Date |
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US2365864A true US2365864A (en) | 1944-12-26 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US436152A Expired - Lifetime US2365864A (en) | 1942-03-25 | 1942-03-25 | Means of illuminating telephone dials, etc. |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2480393A (en) * | 1947-10-06 | 1949-08-30 | Mark W Bossert | Dial light |
US2515437A (en) * | 1946-11-12 | 1950-07-18 | Bisch Paul Eugene | Illuminated mirror device |
US2516676A (en) * | 1949-04-28 | 1950-07-25 | Clarence J Caroselli | Telephone dial light attachment |
US2563537A (en) * | 1951-08-07 | Illuminated instrument face | ||
US2668902A (en) * | 1949-12-09 | 1954-02-09 | Fisher Nathan | Headlamp rim light |
US2855709A (en) * | 1955-07-27 | 1958-10-14 | Grimes Mfg Company | Illuminated instrument panel |
US2988631A (en) * | 1959-06-11 | 1961-06-13 | Bell Telephone Labor Inc | Telephone dial light |
US3264769A (en) * | 1960-12-07 | 1966-08-09 | George K C Hardesty | Illuminated fixed indicia indicating device |
US4444459A (en) * | 1981-06-29 | 1984-04-24 | The Boeing Company | Fiber optic slip ring |
US5013893A (en) * | 1988-09-14 | 1991-05-07 | E.G.O. Elektro-Gerate Blanc U. Fischer | Heating device |
US5083240A (en) * | 1989-08-24 | 1992-01-21 | Technophone Limited | Light guide |
US20080170381A1 (en) * | 2006-11-24 | 2008-07-17 | Li-Kun Chou | Lighting module for use in a keypad device |
-
1942
- 1942-03-25 US US436152A patent/US2365864A/en not_active Expired - Lifetime
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2563537A (en) * | 1951-08-07 | Illuminated instrument face | ||
US2515437A (en) * | 1946-11-12 | 1950-07-18 | Bisch Paul Eugene | Illuminated mirror device |
US2480393A (en) * | 1947-10-06 | 1949-08-30 | Mark W Bossert | Dial light |
US2516676A (en) * | 1949-04-28 | 1950-07-25 | Clarence J Caroselli | Telephone dial light attachment |
US2668902A (en) * | 1949-12-09 | 1954-02-09 | Fisher Nathan | Headlamp rim light |
US2855709A (en) * | 1955-07-27 | 1958-10-14 | Grimes Mfg Company | Illuminated instrument panel |
US2988631A (en) * | 1959-06-11 | 1961-06-13 | Bell Telephone Labor Inc | Telephone dial light |
US3264769A (en) * | 1960-12-07 | 1966-08-09 | George K C Hardesty | Illuminated fixed indicia indicating device |
US4444459A (en) * | 1981-06-29 | 1984-04-24 | The Boeing Company | Fiber optic slip ring |
US5013893A (en) * | 1988-09-14 | 1991-05-07 | E.G.O. Elektro-Gerate Blanc U. Fischer | Heating device |
US5083240A (en) * | 1989-08-24 | 1992-01-21 | Technophone Limited | Light guide |
US20080170381A1 (en) * | 2006-11-24 | 2008-07-17 | Li-Kun Chou | Lighting module for use in a keypad device |
US7651231B2 (en) * | 2006-11-24 | 2010-01-26 | Lite-On Technology Corp. | Lighting module for use in a keypad device |
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