US2205097A - Tuning mechanism - Google Patents

Tuning mechanism Download PDF

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Publication number
US2205097A
US2205097A US169103A US16910337A US2205097A US 2205097 A US2205097 A US 2205097A US 169103 A US169103 A US 169103A US 16910337 A US16910337 A US 16910337A US 2205097 A US2205097 A US 2205097A
Authority
US
United States
Prior art keywords
tuning
shaft
driven
flywheel
condenser
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
US169103A
Other languages
English (en)
Inventor
Knos Gunnar Borge
Horowitz Alexandre
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US2205097A publication Critical patent/US2205097A/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
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • 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
    • H03J1/08—Toothed-gear drive; Worm drive

Definitions

  • the present invention consists in that the flywheel, or the braking disc, is mounted on a separate shaft which is driven and accelerated by the shaft of the tuning knob. Owing to this the flywheel may be given a very small size.
  • the invention is of great importance for devices, known per se, comprising a brake which, after establishment of correct tuning to -a carrier wave, automatically operates by the action of the incoming signal.
  • a brake which, after establishment of correct tuning to -a carrier wave, automatically operates by the action of the incoming signal.
  • Such a system is shown, for exampla'zby C. J. Van Loon, Patent No. 2,108,420, issued on Feb. 15, -1938. It has turnedout to be extremely efficacious to drive the brake disc, according to the invention, in an accelerated manner While using the brake disc as a flywheel at the same time, if desired. It will be appreciated that it is desirable to stop the tuning condenser as rapidly as possible upon establishment of accurate tuning. This can now be accomplished by ,proceeding according to the invention.
  • the tuning knob l is secured to the shaft 2, which has mounted on it a toothed wheel 3 having a comparatively large size, and a 50 pinion 4.
  • Two shafts 5 and 6, carrying the toothed wheel l and the pinion 8 respectively, are journalled in the frame.
  • the tuning condenser 9 is secured to the shaft 5, whereas the shaft 6 carries the flywheel I0.
  • the tuning knob is jerkily driven the flywheel l provides that the system of axes, and the members ⁇ mounted thereon, continue moving without any further attendance. Due to the fact that the movement of the shaft 6 is greatly accelerated relatively to the shaft 2, a flywheel having a comparatively small size is suflicient.
  • the shaft 2 is given a greatly accelerated movement relatively to the shaft so that when the disc I0 is used as a brake disc, which may for instance be effected by making the flywheel lll from magnet material and by subjecting it to the action of a Ibraking magnet ll, the substantially unavoidable angular rotation of the brake disc after operating the brake will not affect the tuning. In fact, the said rotation will be transferred in a highly retarded manner to the condenser shaft.
  • a tuning mechanism for a radio receiving set provided with a tuning condenser, a driving shaft and a plurality of driven shafts all arranged in parallel, the tuning condenser being mounted on one of the driven shafts, a combined flywheel and brake disc of magnetic material mounted on a second driven shaft,l a braking magnet responsive to incoming signals cooperatively related with said combined flywheel and brake disc and gearing means separately interconnecting each driven shaft with the driving shaft such that rotation of the latter shaft at a certain speed causes the first driven shaft to rotate at reduced speed and the second driven shaft to rotate at increased speed with respect to the driving shaft.
  • a tuning mechanism for a radio receiving set provided with a tuning condenser, a driving shaft and a plurality of driven shafts, the tuning condenser being mounted on one of the driven shafts, a fly wheel of magnetic material mounted on a second driven shaft, a braking magnet responsive to incoming signals cooperatively related with said flywheel, a large gear and v a small gear mounted on the driving shaft, a large gear mounted on the driven tuning condenser shaft meshing with the small gear of the driving shaft, and a small gear on the driven flywheel shaft meshing with the large gear of the driving shaft.
  • Tuning mechanism for radio receiving sets comprising a driving shaft and a pair of driven shafts all arranged in parallel, a tuning condenser mounted on one of the driven shafts, a combined flywheel and brake disc of magnetic material mounted on the other of said driven shafts, a braking magnet cooperatively related with said brake disc, a large gear and a small gear mounted on the driving shaft, a large gear mounted on the driven tuning condenser shaft meshing with the small gear of the driving shaft, and a small gear on the driven fly-Wheel and brake disc shaft meshing with the large gear of the driving shaft, the arrangement being such that rotation of the driving shaft causes rotation of the tuning shaft at reduced speed and the brake disc at increased speed, whereby slight continued angular rotation of the brake disc upon operation of the brake magnet at the desired tuning position of the tuning condenser will have no substantial eiect on said tuning position.

Landscapes

  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
US169103A 1936-12-11 1937-10-15 Tuning mechanism Expired - Lifetime US2205097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2205097X 1936-12-11

Publications (1)

Publication Number Publication Date
US2205097A true US2205097A (en) 1940-06-18

Family

ID=19873875

Family Applications (1)

Application Number Title Priority Date Filing Date
US169103A Expired - Lifetime US2205097A (en) 1936-12-11 1937-10-15 Tuning mechanism

Country Status (3)

Country Link
US (1) US2205097A (enrdf_load_stackoverflow)
BE (1) BE425103A (enrdf_load_stackoverflow)
FR (1) FR830598A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494235A (en) * 1946-11-01 1950-01-10 Edward F Andrews Stop-on-signal radio apparatus
US2493741A (en) * 1946-11-01 1950-01-10 Edward F Andrews Stop-on-signal radio apparatus
US2541018A (en) * 1946-11-01 1951-02-13 Signal Tuned Radio Corp Stop-on-signal radio apparatus
US2706787A (en) * 1949-07-30 1955-04-19 Rca Corp Signal seeking tuning systems
US2800587A (en) * 1953-01-07 1957-07-23 Gen Motors Corp Manual powered tuner
US2924980A (en) * 1958-02-04 1960-02-16 Gen Motors Corp Means for tuning a radio receiver
US20110107869A1 (en) * 2009-11-11 2011-05-12 Hyundai Motor Company Integrated control apparatus for heating, ventilating, and air conditioning system for vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494235A (en) * 1946-11-01 1950-01-10 Edward F Andrews Stop-on-signal radio apparatus
US2493741A (en) * 1946-11-01 1950-01-10 Edward F Andrews Stop-on-signal radio apparatus
US2541018A (en) * 1946-11-01 1951-02-13 Signal Tuned Radio Corp Stop-on-signal radio apparatus
US2706787A (en) * 1949-07-30 1955-04-19 Rca Corp Signal seeking tuning systems
US2800587A (en) * 1953-01-07 1957-07-23 Gen Motors Corp Manual powered tuner
US2924980A (en) * 1958-02-04 1960-02-16 Gen Motors Corp Means for tuning a radio receiver
US20110107869A1 (en) * 2009-11-11 2011-05-12 Hyundai Motor Company Integrated control apparatus for heating, ventilating, and air conditioning system for vehicle

Also Published As

Publication number Publication date
BE425103A (enrdf_load_stackoverflow)
FR830598A (fr) 1938-08-03

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