GB551320A - Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers - Google Patents

Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers

Info

Publication number
GB551320A
GB551320A GB1026241A GB1026241A GB551320A GB 551320 A GB551320 A GB 551320A GB 1026241 A GB1026241 A GB 1026241A GB 1026241 A GB1026241 A GB 1026241A GB 551320 A GB551320 A GB 551320A
Authority
GB
United Kingdom
Prior art keywords
scale
cylinder
receivers
radio
graduated scale
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
GB1026241A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB1026241A priority Critical patent/GB551320A/en
Publication of GB551320A publication Critical patent/GB551320A/en
Expired legal-status Critical Current

Links

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
    • H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like

Landscapes

  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

551,320. Radio receivers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and COCKERELL, C. S. Aug. 12, 1941, No. 10262. [Class 37] [Also in Group XIX] The graduated scale member of an indicating apparatus is arranged to move successively across and along the length of a cursor line which is itself curved or shaped to correct the readings for ascertained errors. As shown applied to the tuning scales of radio receivers, Figs. 1 and 2, the scale s is engraven or otherwise marked, in accordance with a known law, helically upon a cylinder c on an operating axle a. The axle is also operatively connected to a pointer p traversing a scale equal to the length of the cylinder. The casing of the receiver is formed with a window closed by a transparent covering t with a correction curve cc forming a cursor line. The scale on the cylinder may have a plurality of ranges and co-operate with a corresponding number of pointers. The correction curve is obtained by calibrating the receiver at a number of selected points on the scale.
GB1026241A 1941-08-12 1941-08-12 Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers Expired GB551320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1026241A GB551320A (en) 1941-08-12 1941-08-12 Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1026241A GB551320A (en) 1941-08-12 1941-08-12 Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers

Publications (1)

Publication Number Publication Date
GB551320A true GB551320A (en) 1943-02-17

Family

ID=9964616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1026241A Expired GB551320A (en) 1941-08-12 1941-08-12 Improvements in graduated scale indicators, such as may be used as tuning scales for radio-receivers

Country Status (1)

Country Link
GB (1) GB551320A (en)

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