US2498436A - Dial along which a pointer is movable, more particularly tuning dial for radio apparatus - Google Patents

Dial along which a pointer is movable, more particularly tuning dial for radio apparatus Download PDF

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Publication number
US2498436A
US2498436A US745478A US74547847A US2498436A US 2498436 A US2498436 A US 2498436A US 745478 A US745478 A US 745478A US 74547847 A US74547847 A US 74547847A US 2498436 A US2498436 A US 2498436A
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US
United States
Prior art keywords
dial
pointer
portions
rod
rods
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
US745478A
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English (en)
Inventor
Legras August Nicolaas
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 US2498436A publication Critical patent/US2498436A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/08—Constructional details, e.g. cabinet

Definitions

  • the invention relates to dials, more particu- I larly tuning dials for radio-apparatus, wherein the dial marks are provided on a translucent carrying member located approximately in one plane and illuminated by laterally transmitted incldent rays which are transmitted along rod-like portions of the said member, a pointer being movable along the dial.
  • the translucent carrying member is usually constituted by a glass plate on which the marks-the names of transmitting stations and/or the wavelength graduations-are printed.
  • the dial Due to the comparatively large dimensions of the dial it is not easy to design an aesthetically pleasing construction for the radio-receiver cabinet, wherein the dial is arranged so as to permit of being easily glanced over, more particularly if comparatively small apparatus are concerned. Attempts have already been made to solve this problem by mounting the dial in front of the conventional loudspeaker and by thus utilizing part of the space required for the loudspeaker opening in the front panel of the apparatus at the same time for the accommodation of the said dial. In this event, however, the dial plate is required to pass the sounds from the said speaker, which may be achieved by providing apertures in the said carrying member. In general, however, these apertures will be located in the path of the light thrown via the side-face or faces into the dial plate and thus prevent the plate from being uniformly lighted.
  • a construction is known wherein the translucent carrying member of the dial marks is constituted by a plurality of separate glass strips each provided with at least one illumination lamp.
  • the large number of illumination lamps required in this case constitutes a serious disadvantage of this construction.
  • the member on which the marks are provided consists of a plurality of rods which, at least at one end, are curved towards a central point at which the illumination lamp is located.
  • the light emitted by this lamp is transmitted, in accordance with a known princlple through the rods, follows the curvature of the latter and reaches the straight portions of the rods on which the dial marks are provided.
  • One common illumination lamp consequently may sumce for all the rods although it is also possible to provide a lamp at each end of the 4 Claims.
  • the lighted grid gives a beautiful aesthetical eifect.
  • the member carrying the marks is constituted by a substantially fiat plate in which slits are provided which extend in the direction of the movement of the pointer and the ends of which are curved towards the illumination lamp, transparent artificial resin being a suitable material for manufacturing this plate.
  • transparent artificial resin being a suitable material for manufacturing this plate.
  • Fig. 1 represents a front-view of a radio-apparatus wherein a dial according to the inventionisused.
  • Fig. 2 shows a detail represented as a crosssection taken on the line IIII of Fig. 1.
  • Figure 3 shows a section in elevation of the rods and the pointer taken along the line IIIIII of Figure l.
  • the radio-receiver represented in Fig. 1 is mounted in a, for example moulded, cabinet l the front of which is open for the greater part and is covered by a cloth. Behind the cloth is located a loudspeaker opening 3, whereas in front of the cloth is provided a dial which essentially consists of a plurality of rods 5 of transparent artificial resin which are located in one plane and on which the dial marks-names of stations and small blocks for indicating the tuningare provided.
  • a pointer 6 is arranged behind 'the rods 5 so as to be movable along the parallel rods (i-a by means of a conventional cable 6-D attached to the said pointer and to a knob (not shown).
  • the cord 6b is adjustable relative to the rod 6 when the set screw 6-c is loosened.
  • the ends 5a of the rods 5 are curved and are hidden behind the portion 1 of the frontpanel of the cabinet I.
  • the ends 511 of the rods join to form a substantially semi-circular plate 9 in the centre of which an aperture H is provided in which an incandescent lamp I3 is arranged.
  • the rods 5 and the plate 9 are preferably moulded to form a unit which exhibits the shape of a fiat plate with open spaces.
  • the light emitted by the dial illumination lamp I3 is transmitted into the thickest portion of plate 9 and passes through the curved ends 511 on to the straight portions of the rods 5 so that the marks provided thereon are lighted from the interior of the straight portions in the manner known in the optical art.
  • Some light also passes may be comparatively thin, owing to which thinness they cover only a comparatively small portion of the surface area of the loudspeaker opening so that the sound coming from the loudspeaker can pass through the dial between the said straight portion without appreciable attenuation.
  • the thickness of the plate 9 in the proximity of the illumination lamp l3 preferably increases to form a hub-shaped portion separating it from the said lamp, as is shown in Fig. 2. In consequence thereof the plate 9 receives from the lamp It a larger amount of light than would be the case with a completely flat plate. This is advantageous for obtaining suificient light in those portions of the rods 5 which are remote from the lamp II.
  • the rods 8 may also be curved, for example according to a nearly complete circle, the dial portion in which the lamp is provided being preferably covered in this case by a sector-shaped portion of the front-panel.
  • the invention may be applied in the first place to radioapparatus, the advantages obtainable with it may also be important for other apparatus, for example measuring apparatus, whilst if thedial is not arranged in front of the loudspeaker the aesthetic effect yet retains its value.
  • a tuning dial for radio apparatus which comprises a grid-shaped translucent light diffusing carrying member formed with a plurality of spaced apart parallel rod portions having marks thereon, an illumination lamp member.” and a pointer member, said rod portions respectively being joined at one end to form a common central portion of said grid-shaped member and having an aperture, said lamp member being positioned in said aperture so as to transmit light to said portions and incident light rays along said rods to light said rod portions thereby to cause said marks to become conspicuous, said pointer member mounted at right angles to said rod portions, and means to move said pointer parallel to said rod portions.
  • a tuning dial for radio apparatus which comprises an approximately flat grid-shaped translucent light difl'using carrying member of artificial resin formed with a plurality of spaced apart parallel rod-like portions having marks thereon, an illumination lamp, and a pointer, said. rod-like portions respectively being joined at one end thereof to form a common central portion having an aperture, said lamp being positioned in said aperture so as to transmit incident light rays along said rod-like portions to light 4 said rod-like portions to cause said marks to become conspicuous thereby, said pointer bein8 mounted at approximately right angles to said rod-like portions, and means to move said pointer parallel to the said member.
  • a tuning dial for radio apparatus including a loud speaker opening, which comprises an approximately flat grid-shaped translucent light diffusing carrying member of artificial resin formed with a pluralityof spaced apart parallel rod-like portions provided with marks and positioned in front of said opening, said rod-like portions respectively being joined at one end to form 1 a common central portion having an aperture, an
  • illumination lamp member positioned within the said aperture so as to transmit incident light rays along said rod-like portions to light said rodlike portions to cause said marks to become conspicuous thereby, said common portion increasing in the thickness in the vicinity of the said lamp member.
  • a pointer member mounted at approximately right angles to the said rod-like portions, and means to move said pointer parallel to the said member.
  • a tuning dial for radio apparatus including a loud speaker opening, which comprises an apsaid rod-like portions to cause the said marks to become conspicuous thereby, a pointer mounted at approximately right angles to said rod-like portions, and means to move said pointer in front of said loud speaker opening and parallel to the said marked rod-like portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Structure Of Receivers (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
US745478A 1946-05-10 1947-05-02 Dial along which a pointer is movable, more particularly tuning dial for radio apparatus Expired - Lifetime US2498436A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL261514X 1946-05-10

Publications (1)

Publication Number Publication Date
US2498436A true US2498436A (en) 1950-02-21

Family

ID=19781532

Family Applications (1)

Application Number Title Priority Date Filing Date
US745478A Expired - Lifetime US2498436A (en) 1946-05-10 1947-05-02 Dial along which a pointer is movable, more particularly tuning dial for radio apparatus

Country Status (6)

Country Link
US (1) US2498436A (de)
BE (1) BE473128A (de)
CH (1) CH261514A (de)
DE (1) DE805048C (de)
FR (1) FR946428A (de)
GB (1) GB628163A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857361A (en) * 1973-12-19 1974-12-31 Gen Instrument Corp Combined vhf and uhf display system
US4954930A (en) * 1988-09-27 1990-09-04 Alps Electric Co., Ltd. Illumination light guide
US20170322367A1 (en) * 2016-05-05 2017-11-09 Wuhu Valeo Automotive Lighting Systems Co., Ltd. Light guide assembly and vehicle lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2876764A (en) * 1955-06-18 1959-03-10 Siemens Reiniger Werke Ag Ultrasonic treatment apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196166A (en) * 1939-06-30 1940-04-02 Ibm Data reproducing machine
GB539812A (en) * 1940-04-03 1941-09-24 Marconi Wireless Telegraph Co Improvements in calibrating scales suitable for use in radio-receivers
US2333492A (en) * 1940-10-26 1943-11-02 Ridge Herman De Witt Spotlight indicator
US2402014A (en) * 1944-03-09 1946-06-11 Edgar L Boeck Illuminated clock dial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196166A (en) * 1939-06-30 1940-04-02 Ibm Data reproducing machine
GB539812A (en) * 1940-04-03 1941-09-24 Marconi Wireless Telegraph Co Improvements in calibrating scales suitable for use in radio-receivers
US2333492A (en) * 1940-10-26 1943-11-02 Ridge Herman De Witt Spotlight indicator
US2402014A (en) * 1944-03-09 1946-06-11 Edgar L Boeck Illuminated clock dial

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857361A (en) * 1973-12-19 1974-12-31 Gen Instrument Corp Combined vhf and uhf display system
US4954930A (en) * 1988-09-27 1990-09-04 Alps Electric Co., Ltd. Illumination light guide
US20170322367A1 (en) * 2016-05-05 2017-11-09 Wuhu Valeo Automotive Lighting Systems Co., Ltd. Light guide assembly and vehicle lamp

Also Published As

Publication number Publication date
BE473128A (de) 1947-11-08
FR946428A (fr) 1949-06-02
GB628163A (en) 1949-08-23
CH261514A (de) 1949-05-15
DE805048C (de) 1951-05-07

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