US2770712A - Illuminated dial plate - Google Patents

Illuminated dial plate Download PDF

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Publication number
US2770712A
US2770712A US265683A US26568352A US2770712A US 2770712 A US2770712 A US 2770712A US 265683 A US265683 A US 265683A US 26568352 A US26568352 A US 26568352A US 2770712 A US2770712 A US 2770712A
Authority
US
United States
Prior art keywords
plate
dial
lamp
dial plate
piece
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
Application number
US265683A
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English (en)
Inventor
Dros Aris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2770712A publication Critical patent/US2770712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H03J1/044—Illumination of the tuning dial; On and off switching of the illumination; Circuits related with illumination

Definitions

  • This invention relates to improvements in dials having a dial plate of transparent material which areparticularly useful in radio receivers.
  • dial plates were always made of glass, there is an increasing use of dial plates of transparent plastic material, such, for example, as polymethacrylate.
  • Plastic dial plates however, often give rise to difliculties due to the heat produced by the dial lamp, which may result in weakening and, after some time, dim-ness of the plastic material. Previously, this has been an o'bjection to the use of particular plastics having definite advantages, for example, polystyrene, the price of which is relatively low.
  • the invention has for its object to obviate these difiiculties, which are in general inherent with the use of dial plates of a material having little resistance to heat. This is eifected by providing a connecting piece between the incandescent lamp and the dial plate, this piece being made of a transparent material which has greater resistance to heat than the material of the dial plate.
  • Figure 1 shows the front view of a radio receiver according to the invent-ion.
  • Figure 2 is a perspective view of the invention from the rear side of the dial.
  • Figure 3 shows in section another embodiment of the invent-ion.
  • the receiver shown in Fig. 1 comprises a front wall which comprises, as usual, a frame 1 having a board provided behind the aperture, in which an aperture 3 for the loudspeaker is provided and covered by a cloth.
  • a dial plate 15 in suitable grooves of the frame 1, a pointer 7 being adapted to move behind this plate.
  • the connecting piece 17 provision is made for a recess 9 and an illuminating lamp III, which is arranged in a manner such that its light falls laterally on the connecting piece 17 and emerges at the markings of the station dial, so that these marks are distinctly illuminated.
  • dial plates of poorly heat-resistant material for example plastic
  • dial plates of poorly heat-resistant material for example plastic
  • plastics having a slightly greater heat resistance such for example, as polymethacrylate, but they are materially more costly than plastics having low weakening temperatures, such as for example, polystyrene.
  • Fig. 2 illustrates, viewed from the rear side of the dial, howthe major part of the dial can be made of inexpensive plastic according to the invention.
  • a trapezoidal connecting piece 17 of transparent sheet material is arranged between the vertical dial plate 15, made for example, of polystyrene, and the incandescent lamp 11, at right angles to the plate'1 5.
  • the transparent sheet material in piece 17 has a higher weakening point than polystyrene and can be for example, polymethacrylate or glass.
  • the incandescent lamp 11 is housed in a recess at the short parallel edge of the trapezoidal (horizontal) connecting piece 17 and the long parallel edge loosely engages the lower edge of the plate 15 or is secured thereto with the use of transparent adhesive.
  • Rays emanating approximately horizontally from the lamp 11 are collected by the connecting plate 17 and propagated to the lower edge of the dial plate 15.
  • the rays fall on the rear side in a horizontal direction into the plate 15; however, on the front side, at the lower edge, the plate 15 has a facet, i. e. a slanting surface 19, which is at an angle of approximately 45 to the rear side of the plate and which reflects the horizontal incident inside of the plate approximately in a vertical direction.
  • the plate 15 is insulated from the heat produced by the incandescent lamp 11.
  • the cooling of the incandescent lamp is particularly favorable, since a vertical flow of air can freely brush past the lamp.
  • structural advantage is obtained by the present invention since the dial occupies little space and since the plate 17 extends primarily along the bottom of the cabinet.
  • the trapezoidal intermediate piece ensures furthermore a uniform distribution of the light in the plate 15.
  • the plate 17 can be made of two plates of this kind and may be arranged in line with the plate 15.
  • the intermediate piece 17 may have a particular color or differently colored parts, so that a color effect may be obtained in a colorless dial plate.
  • Fig. 3 shows, in an axial sectional view, a second embodiment of the intermediate piece 21, which is, in this case, primarily rod-shaped; one end thereof may be secured in a fitting circular aperture in the dial plate 23.
  • the rod has a cup-shaped cavity 24, in which the incandescent lamp 11 is housed.
  • the rod has a re-entrant profile 25 of such a shape that primarily axially incident light rays are projected into the plate 23 in radial directions.
  • This construction is particularly suitable for dial plates, with which the incandescent lamp is arranged approximately opposite the center of the dial plate.
  • a dial for use in radio receivers comprising an incandescent lamp, a transparent dial plate composed of a thermoplastic resin material which will be deformed or discolored when positioned adjacent to said lamp, said dial plate having a bottom marginal edge which slants angularly upwards, and a transparent connecting piece arranged between said lamp and said dial plate and angularly thereto, said piece being adapted to transmit light from said lamp to said dial plate through said bottom marginal edge and said piece being composed of a thermoplastic resin material exhibiting a value of resistance to heat at which said piece is not substantially deformed or discolored when adjacent said lamp.
  • a dial for use in radio receivers comprising an incandescent lamp, a transparent dial plate composed of a thermoplastic resin material which will be deformed or discolored when positioned adjacent to said lamp, said dial plate having a bottom marginal edge which slants angularly upwards, and a transparent connecting piece in the form of a trapezoidal plate arranged between said lamp and said dial plate and angularly thereto, said piece being adapted to transmit light from said lamp to said dial plate through said bottom marginal edge, said piece being composed of a thermoplastic resin material ex hibiting a value of resistance to heat at which said piece is not substantially deformed or discolored when adjacent said lamp and having a recess in the shorter parallel edge in which is located said incandescent lamp, the longer parallel side of said connecting piece engaging said dial plate, and the air heated by said lamp being adapted to escape in a substantially vertical direction without contacting said connecting piece.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Details Of Measuring Devices (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
US265683A 1951-02-12 1952-01-09 Illuminated dial plate Expired - Lifetime US2770712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL159216A NL82025C (nl) 1951-02-12 1951-02-12

Publications (1)

Publication Number Publication Date
US2770712A true US2770712A (en) 1956-11-13

Family

ID=41119335

Family Applications (1)

Application Number Title Priority Date Filing Date
US265683A Expired - Lifetime US2770712A (en) 1951-02-12 1952-01-09 Illuminated dial plate

Country Status (5)

Country Link
US (1) US2770712A (nl)
DE (1) DE944739C (nl)
FR (1) FR1050731A (nl)
GB (1) GB708203A (nl)
NL (2) NL82025C (nl)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854509A (en) * 1951-08-04 1958-09-30 Alden Products Co Facsimile optical scanning apparatus
US2868960A (en) * 1956-02-07 1959-01-13 Arthur V Appel Instrument dial illuminator
DE1173267B (de) * 1961-08-14 1964-07-02 M K Juchheim Thermometerfabrik Vorrichtung zum lichtelektrischen Betaetigen von Grenzwertkontakten und zum Beleuchten der Anzeigemittel bei Zeigereinbauinstrumenten
US3148834A (en) * 1961-11-22 1964-09-15 Sperry Rand Corp Illumination system
US3248554A (en) * 1961-12-13 1966-04-26 Sperry Rand Corp Uniform intensity illumination system
US3761704A (en) * 1972-01-06 1973-09-25 Matusushita Electric Ind Co Lt Dial illuminating device
JPS5194683U (nl) * 1975-01-27 1976-07-29
JPS5194684U (nl) * 1975-01-27 1976-07-29
JPS51103651U (nl) * 1975-02-18 1976-08-19
US4026635A (en) * 1974-10-18 1977-05-31 Ab Teleplan Indicator for displaying text or symbols on small surfaces
US4085436A (en) * 1976-10-14 1978-04-18 Allen Weiss Ring light converter for electronic flash units
US4447118A (en) * 1981-09-21 1984-05-08 The Boeing Company Optical information transfer system
US4564286A (en) * 1983-06-09 1986-01-14 Xerox Corporation Illumination device
US5255162A (en) * 1991-05-07 1993-10-19 Pioneer Electric Corporation Lighting device for a grille of a car stereo
US6932499B2 (en) * 1995-03-22 2005-08-23 Canon Kabushiki Kaisha Light conductive member, illuminating device having the same, and information processing apparatus having the illuminating device
US20060203463A1 (en) * 2005-03-08 2006-09-14 Sumitomo Wiring Systems, Ltd. Light guiding body and lighting apparatus having the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290996B (de) * 1958-06-27 1969-03-20 Siemens Ag Beleuchtbare Anzeigevorrichtung fuer Geraete der elektrischen Nachrichtenuebertragungs- und Messtechnik
GB1463061A (en) * 1973-05-22 1977-02-02 Lucas Electrical Ltd Illuminable element

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1714242A (en) * 1927-04-19 1929-05-21 Paramount Famous Lasky Corp Reflector arc
US2071284A (en) * 1935-10-23 1937-02-16 Bendix Radio Corp Indicating device
US2150836A (en) * 1937-02-27 1939-03-14 Weston Electrical Instr Corp Electrical measuring instrument
US2413848A (en) * 1944-02-02 1947-01-07 Simpson Ray Illuminated instrument
GB595003A (en) * 1944-02-02 1947-11-25 Ray Simpson Improvements in means for illuminating indicating instruments
US2560117A (en) * 1947-01-31 1951-07-10 Robert W Mallary Sign
US2611018A (en) * 1949-06-24 1952-09-16 Westinghouse Brake & Signal Mimic diagram panel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1714242A (en) * 1927-04-19 1929-05-21 Paramount Famous Lasky Corp Reflector arc
US2071284A (en) * 1935-10-23 1937-02-16 Bendix Radio Corp Indicating device
US2150836A (en) * 1937-02-27 1939-03-14 Weston Electrical Instr Corp Electrical measuring instrument
US2413848A (en) * 1944-02-02 1947-01-07 Simpson Ray Illuminated instrument
GB595003A (en) * 1944-02-02 1947-11-25 Ray Simpson Improvements in means for illuminating indicating instruments
US2560117A (en) * 1947-01-31 1951-07-10 Robert W Mallary Sign
US2611018A (en) * 1949-06-24 1952-09-16 Westinghouse Brake & Signal Mimic diagram panel

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854509A (en) * 1951-08-04 1958-09-30 Alden Products Co Facsimile optical scanning apparatus
US2868960A (en) * 1956-02-07 1959-01-13 Arthur V Appel Instrument dial illuminator
DE1173267B (de) * 1961-08-14 1964-07-02 M K Juchheim Thermometerfabrik Vorrichtung zum lichtelektrischen Betaetigen von Grenzwertkontakten und zum Beleuchten der Anzeigemittel bei Zeigereinbauinstrumenten
US3148834A (en) * 1961-11-22 1964-09-15 Sperry Rand Corp Illumination system
US3248554A (en) * 1961-12-13 1966-04-26 Sperry Rand Corp Uniform intensity illumination system
US3761704A (en) * 1972-01-06 1973-09-25 Matusushita Electric Ind Co Lt Dial illuminating device
US4026635A (en) * 1974-10-18 1977-05-31 Ab Teleplan Indicator for displaying text or symbols on small surfaces
JPS5754126Y2 (nl) * 1975-01-27 1982-11-24
JPS5194684U (nl) * 1975-01-27 1976-07-29
JPS5194683U (nl) * 1975-01-27 1976-07-29
JPS51103651U (nl) * 1975-02-18 1976-08-19
JPS555992Y2 (nl) * 1975-02-18 1980-02-12
US4085436A (en) * 1976-10-14 1978-04-18 Allen Weiss Ring light converter for electronic flash units
US4447118A (en) * 1981-09-21 1984-05-08 The Boeing Company Optical information transfer system
US4564286A (en) * 1983-06-09 1986-01-14 Xerox Corporation Illumination device
US5255162A (en) * 1991-05-07 1993-10-19 Pioneer Electric Corporation Lighting device for a grille of a car stereo
US6932499B2 (en) * 1995-03-22 2005-08-23 Canon Kabushiki Kaisha Light conductive member, illuminating device having the same, and information processing apparatus having the illuminating device
US20060203463A1 (en) * 2005-03-08 2006-09-14 Sumitomo Wiring Systems, Ltd. Light guiding body and lighting apparatus having the same
US7566138B2 (en) * 2005-03-08 2009-07-28 Sumitomo Wiring Systems, Ltd. Light guiding body and lighting apparatus having the same

Also Published As

Publication number Publication date
NL159216B (nl)
DE944739C (de) 1956-07-12
GB708203A (en) 1954-04-28
NL82025C (nl) 1956-07-16
FR1050731A (fr) 1954-01-11

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