GB475532A - Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus - Google Patents

Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus

Info

Publication number
GB475532A
GB475532A GB1455136A GB1455136A GB475532A GB 475532 A GB475532 A GB 475532A GB 1455136 A GB1455136 A GB 1455136A GB 1455136 A GB1455136 A GB 1455136A GB 475532 A GB475532 A GB 475532A
Authority
GB
United Kingdom
Prior art keywords
rings
notch
control
plunger
knob
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
GB1455136A
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.)
EDWARD IVAN STAPLES
SIDNEY GEORGE KNIGHT
STC PLC
Original Assignee
EDWARD IVAN STAPLES
SIDNEY GEORGE KNIGHT
Standard Telephone and Cables 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 EDWARD IVAN STAPLES, SIDNEY GEORGE KNIGHT, Standard Telephone and Cables PLC filed Critical EDWARD IVAN STAPLES
Priority to GB1455136A priority Critical patent/GB475532A/en
Publication of GB475532A publication Critical patent/GB475532A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/04—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by hand
    • H03J5/06—Settings determined by single indexing means with snap action

Landscapes

  • Mechanical Control Devices (AREA)

Abstract

475,532. Adjusting wireless apparatus. STANDARD TELEPHONES & CABLES, Ltd., KNIGHT, S. G., and STAPLES, E. I. May 22, 1936, No. 14551. [Class 37] A tuning - control device, particularly for wireless apparatus for adjusting a condenser or other member to any one of a number of selected angular positions, comprises a plurality of normally fixed but angularly - adjustable coaxial rings having notches or projections on their inner peripheries and a rotatable control member carrying a pawl or plunger adapted to engage with any one of the notches or projections on the rings. The rings D correspond in number to the number of tuning positions to be selected and each is provided with a notch P and a projection Q. The rings are separated by non-rotatable washers and are stacked coaxially in a casing, clamped against a rear plate C by screws K or by a cam device. The rings are separately adjusted to the desired positions by the projections Q, so that when the control knob G is rotated to any one of these positions, a plunger H engages in a notch P on one of the rings. The plunger H is pressed outwards by a spring but can be moved inwards to disengage it from a notch by manually pressing in a spring-pressed rod which projects from the control knob G. This rod carries a cam surface which during the inward movement moves a rod coaxial with the control knob inwardly, so that a second cam surface on this coaxial rod engaging a pin on the plunger H moves the latter out of engagement with the notch. The tuning control dial is provided with a scale S cooperating with a pointer on the knob G and a shallow groove in the cover may accommodate metal pieces T. Alternatively, calibration marks may be engraved upon the cover or in a disc secured in the groove. A second knob M on a spring loaded pin provides, when depressed, a slow motion drive for the control shaft, which may be frictional or through gears Y, Z.
GB1455136A 1936-05-22 1936-05-22 Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus Expired GB475532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1455136A GB475532A (en) 1936-05-22 1936-05-22 Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1455136A GB475532A (en) 1936-05-22 1936-05-22 Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus

Publications (1)

Publication Number Publication Date
GB475532A true GB475532A (en) 1937-11-22

Family

ID=10043269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1455136A Expired GB475532A (en) 1936-05-22 1936-05-22 Improvements in or relating to tuning controls for electrical apparatus particularly radio apparatus

Country Status (1)

Country Link
GB (1) GB475532A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059481A (en) * 1960-04-05 1962-10-23 Empire Devices Inc Control knob with vernier
CN108903088A (en) * 2018-08-14 2018-11-30 山东省职业卫生与职业病防治研究院 Dust exposure mask is isolated in one kind in vocational activity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059481A (en) * 1960-04-05 1962-10-23 Empire Devices Inc Control knob with vernier
CN108903088A (en) * 2018-08-14 2018-11-30 山东省职业卫生与职业病防治研究院 Dust exposure mask is isolated in one kind in vocational activity

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