GB496874A - Improvements in tuning indicators for wireless receivers - Google Patents

Improvements in tuning indicators for wireless receivers

Info

Publication number
GB496874A
GB496874A GB989037A GB989037A GB496874A GB 496874 A GB496874 A GB 496874A GB 989037 A GB989037 A GB 989037A GB 989037 A GB989037 A GB 989037A GB 496874 A GB496874 A GB 496874A
Authority
GB
United Kingdom
Prior art keywords
carriage
spindle
thread
disc
pinion
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
GB989037A
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.)
EDWIN LESLIE MERCER
RICHARD GOSDEN
General Electric Co PLC
Original Assignee
EDWIN LESLIE MERCER
RICHARD GOSDEN
General Electric Co PLC
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 EDWIN LESLIE MERCER, RICHARD GOSDEN, General Electric Co PLC filed Critical EDWIN LESLIE MERCER
Priority to GB989037A priority Critical patent/GB496874A/en
Publication of GB496874A publication Critical patent/GB496874A/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
    • H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
    • H03J1/10—Rope drive; Chain drive

Landscapes

  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

496,874. Adjusting wireless apparatus. GENERAL ELECTRIC CO., Ltd., GOSDEN, R., HUNTER, S. G., and MERCER, E. L. April 7, 1937, Nos. 9890 and 31335. [Class 37] The moving element of a tuning indicator for a wireless receiver carries a member 6 moved by rack-and-pinion means relatively to the moving element so as to indicate small adjustments. A carriage 1 carrying a pointer 2 slides along a straight bar 3 so as to carry the pointer 2 over a scale 4. A pinion 5, Fig. 1, attached to a disc 6 is mounted on a spindle 7 carried by the carriage 1 so that the pinion 5 meshes with a rack 8. The edge of the disc 6 is calibrated and is adjacent to a mark 9 on the carriage 1. In a modification, Fig. 2, backlash is eliminated by means of a thread, thin string, piano wire, &c. 14 attached to and wound on to the spindle 7 carrying the disc 6, the free end being held under tension by a spring 15. The spindle 7 is driven through gearing 16 by means of a spur-wheel 17 engaging a perforated strip 18. The rate of revolution of the spindle 7 and its circumference are such that the rate of winding or unwinding of the thread 14 is equal to the rate of travel of the carriage 1, so as to maintain a constant tension on the thread.
GB989037A 1937-04-07 1937-04-07 Improvements in tuning indicators for wireless receivers Expired GB496874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB989037A GB496874A (en) 1937-04-07 1937-04-07 Improvements in tuning indicators for wireless receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB989037A GB496874A (en) 1937-04-07 1937-04-07 Improvements in tuning indicators for wireless receivers

Publications (1)

Publication Number Publication Date
GB496874A true GB496874A (en) 1938-12-07

Family

ID=9880678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB989037A Expired GB496874A (en) 1937-04-07 1937-04-07 Improvements in tuning indicators for wireless receivers

Country Status (1)

Country Link
GB (1) GB496874A (en)

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