GB595003A - Improvements in means for illuminating indicating instruments - Google Patents

Improvements in means for illuminating indicating instruments

Info

Publication number
GB595003A
GB595003A GB22482/44A GB2248244A GB595003A GB 595003 A GB595003 A GB 595003A GB 22482/44 A GB22482/44 A GB 22482/44A GB 2248244 A GB2248244 A GB 2248244A GB 595003 A GB595003 A GB 595003A
Authority
GB
United Kingdom
Prior art keywords
cylindrical
light
rear surface
dial
indicating
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
Application number
GB22482/44A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB595003A publication Critical patent/GB595003A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

595,003. Indicating-apparatus. SIMPSON, R. Nov. 14, 1944, No. 22482. Convention date, Feb. 2. [Class 106 (iv)] An illuminating device for indicating apparatus is described embodied in an electrical instrument such as a milliameter and comprises an external source of light, means for conducting light from the source and for distributing light uniformly over the indicating means. A moving coil is mounted adjacent to a pair of opposed poles 32a of a permanent magnet 30 and carries a pointer 45 to indicate the units to be measured by co-operating with indicia on a dial plate 43, preferably opaque, the indication being viewed through a transparent member 22 which together with a cylindrical member 11 (which may be of insulation) and an insulating back wall 15 encloses the instrument. A lightconducting member 46 made preferably of a suitable transparent plastic, has a cylindrical stem 47 which passes through and is held by a cylindrical bore 49 in the rear wall 15 and which has a plane rear surface 48. At the front the stem portion is formed integrally with a disc portion 51 in contact with the rear surface of the dial 43 and a cylindrical portion 53 abutting the front cover 22, held in position by the friction fit of a bezel ring 26. On the rear side the disc portion and cylindrical portions are joined by curved portions and on the front side a symmetrical tapered depression 60 is formed at the centre. An external source of light illuminates the plane rear surface 48 of the member 47 which conducts light to the cylindrical portion 26 and thence illuminates the front of the dial 43 and the pointer 45.
GB22482/44A 1944-02-02 1944-11-14 Improvements in means for illuminating indicating instruments Expired GB595003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US595003XA 1944-02-02 1944-02-02

Publications (1)

Publication Number Publication Date
GB595003A true GB595003A (en) 1947-11-25

Family

ID=22023356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22482/44A Expired GB595003A (en) 1944-02-02 1944-11-14 Improvements in means for illuminating indicating instruments

Country Status (1)

Country Link
GB (1) GB595003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770712A (en) * 1951-02-12 1956-11-13 Hartford Nat Bank & Trust Co Illuminated dial plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770712A (en) * 1951-02-12 1956-11-13 Hartford Nat Bank & Trust Co Illuminated dial plate

Similar Documents

Publication Publication Date Title
GB595003A (en) Improvements in means for illuminating indicating instruments
US2426713A (en) Illuminated instrument
GB2047441B (en) Electronic timepiece
GB847648A (en) Improvements in or relating to electric switches and indicators therefor
GB582691A (en) Improvements in or relating to magnetic compasses
GB878804A (en) Improvements in or relating to measuring instruments comprising an instrument pointer moving in front of a scale in a transparent liquid
ES214893A1 (en) A magnetic support device for a rotating piece of an electrical measuring device (Machine-translation by Google Translate, not legally binding)
GB869439A (en) Improved speedometer, tachometer, or like instrument for measuring the speed of an object
GB842786A (en) Improvements in or relating to electrical indicating instruments
GB719399A (en) Improvements in or relating to measuring or indicating instruments
GB545543A (en) Improvements relating to pressure gauges and like indicating instruments
GB551822A (en) Improvements in or relating to indicators having means for amplifying the movements thereof
GB848049A (en) Speed-warning arrangements for use in speedometers and the like
GB560334A (en) Improvements in or relating to measuring instruments
HK56585A (en) An electronic timepiece
GB504131A (en) Improvements in or relating to speedometers and other indicating instruments
GB599581A (en) Improvements in or relating to indicating and recording instruments
GB554906A (en) Improvements in or relating to measuring, indicating or recording instruments
GB609092A (en) Improvements in means for illuminating indicating instruments
GB505154A (en) Improvements in and relating to indicating apparatus for use on vehicles
GB555434A (en) Improvements relating to dial-type indicators, for measuring instruments
GB503282A (en) Improvements in electrical indicating instruments
GB727183A (en) Improvements in speedometers
GB510182A (en) Improvements in or relating to means for illuminating the readings of weighing scales or like indicating apparatus
TNSN87039A1 (en) DEVICE FOR INDICATING THE ATTEMPT OF ELECTRIC CURRENT FRAUD