US2290644A - Radio receiving set - Google Patents

Radio receiving set Download PDF

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Publication number
US2290644A
US2290644A US281021A US28102139A US2290644A US 2290644 A US2290644 A US 2290644A US 281021 A US281021 A US 281021A US 28102139 A US28102139 A US 28102139A US 2290644 A US2290644 A US 2290644A
Authority
US
United States
Prior art keywords
condenser
spring
shaft
movement
control device
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
US281021A
Other languages
English (en)
Inventor
Knos Gunnar Borge
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 US2290644A publication Critical patent/US2290644A/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
    • 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
    • H03J5/12—Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings
    • 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
    • H03J1/066—Constructional details regarding potentiometric setting of voltage or current variable reactances

Definitions

  • This invention relates to a radio apparatus which, by means of a station selector consisting of a keyboard, a selecting disc and associated mechanism, can be automatically tuned to a number of stations,
  • This apparatus is characterized in that the motion of the keys is transmitted, through a spring which is itself moved from its position of rest by this movement, to the movable condenser shaft whose movement is braked by a damper.
  • FIG. 1 illustrates diagrammatically the application of the improved push button mechanism to a receiver provided with a condenser of the rotary type
  • Fig. 1a is an enlarged view of a portion of Fig. 1 showing the push buttons and the parts associated therewith
  • Fig. 2 illustrates the invention applied to a condenser of the slidable electrode type.
  • Fig. 1 shows one form of construction of the condenser part of the radio set according to the invention, in which the tuning condenser is constructed as a rotating plate condenser.
  • the condenser shaft is denoted by I, whereas the rotary part of the condenser is designated by 2.
  • a pinion 3 is provided on the shaft I
  • This pinion meshes with a toothed sector 4 mounted on the shaft 5.
  • the member 6, which cooperates with the keys 1 having different active lengths, is movable about the shaft 5.
  • the member 6 is connected to the toothed sector 4 through the intermediary of the retracting spring 8. In fact, this spring is connected at A to the member 6 and secured at B to the projecting part 9 which is rigidly connected to the sector 4.
  • the projecting part 9 is provided with the stop H] which by engaging member the spring 8 the correct position of the keys I and the member 6 on the one hand and of the rotary part 2 of the condenser on the other hand is always assured. Furthermore, the toothed sector 4 has pivoted to it the rod H which carries the piston l2 of the air-damper l3. The housing of the latter is furnished with. a small aperture l4. Upon a movement of the toothed sector 4 the piston l2 moves inside the housing of the damper so that air is compressed into the lower part of the housing and then forced out therefrom through the aperture l4.
  • the piston l2 canmove only at a very slight speed inside the housing of the damper, so that the toothed sector rigidly connected to the piston l2 (and consequently also the movable condenser part 2) can only acquire a very low angular speed.
  • the movable condenser part is shifted at a very low speed so that there is no risk of damaging this part.
  • the member 6, which may have various forms and may, for instance, consist of a plurality of separate parts, is rigidly connected to the toothed sector 4, so that a movement of the stop is directly transmitted to the sector. Consequently, this is not the case according to the invention.
  • the member 6 Upon pressing one of the keys 1 which pass through suitable apertures in a support 1a the member 6 will immediately turn through a definite angle, it is true, but the sector will not immediately but only gradually follow this movement due to the presence of the spring 8 and the damper l3. In 'fact, upon turning the member 5 the spring 8 is stressed so that the member 6 is set free from the stop H).
  • the tuning condenser is a three-part slide condenser.
  • the three movable parts I6 are mounted on a common shaft I! which is slidably journalled.
  • the stator parts of the condenser are designated by Hi.
  • the keys l9 having relatively difierent active lengths act on a pressing plate 20 which through the intermediary of a spring 21 acts on the shaft l1.
  • a damper 22 At the end of the shaft I1 is provided a damper 22.
  • the operation of the device is principally similar to that of the device shown in Fig. 1.
  • the spring 23 causes the condenser shaft to resume its zero position upon the return of a pressed key from its latched pressed position. Both upon pressing a key and upon releasing of the spring 2
  • an adjustable control device determining the positioning of said driven means, a plurality of independently operable position selectors each acting upon operation to effect the adjustment of said control device to a position which corresponds to a desired position of said driven means, resilient driving means for said driven means and including a spring element connecting said driven means to said adjustable control device, said resilient driving means acting to follow up any adjustment of said control device with a movement of said will again exdriven means to a position determined by the position to which the control device is adjusted.
  • means including a control shaft for operating said device, an adjustable stopping element for determining the positioning of said control shaft, a plurality of selectively operable means each acting upon operation to effect the movement of said stopping element to a predetermined position, a driving element for said first named means, an energy storing device providing a driving connection between the stopping element and the driving element, said energy storing device acting in conjunction with and. upon operation of the stopping element to one of said positions, to drive said driving element to a position corresponding to the position of the stopping element thereby effecting the adjustment of said adjustable control device to a predetermined position.
  • each of said selectively operable means comprises a member adjustable with respect to said adjustable control element whereby each desired position on said adjustable control element may be adjustably predetermined.
  • a driven element operatively connected to said control device for operating said control device, a movable stop for limiting the movement of said driven element, a plurality of selectively operable means each acting upon operation to effect the movement of said stop to a desired position, resilient driving means for coupling said driven element to said movable stop, said resilient driving means acting to follow up any change in the position of said stop with a movement of said driven element which brings said driven element against said stop, and means for preventing rapid movements of said driven element.

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  • Mechanical Control Devices (AREA)
  • Transmitters (AREA)
US281021A 1938-06-08 1939-06-24 Radio receiving set Expired - Lifetime US2290644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL212536X 1938-06-08

Publications (1)

Publication Number Publication Date
US2290644A true US2290644A (en) 1942-07-21

Family

ID=19778895

Family Applications (1)

Application Number Title Priority Date Filing Date
US281021A Expired - Lifetime US2290644A (en) 1938-06-08 1939-06-24 Radio receiving set

Country Status (6)

Country Link
US (1) US2290644A (de)
BE (1) BE434733A (de)
CH (1) CH212536A (de)
DE (1) DE717159C (de)
FR (1) FR855803A (de)
GB (1) GB521183A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178809A (en) * 1977-03-17 1979-12-18 Sony Corporation Mode change-over device for recording and/or reproducing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951820C (de) * 1952-06-12 1956-11-08 Blaupunkt Werke G M B H Zweign Drucktastenanordnung fuer Nachrichtengeraete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178809A (en) * 1977-03-17 1979-12-18 Sony Corporation Mode change-over device for recording and/or reproducing apparatus

Also Published As

Publication number Publication date
GB521183A (en) 1940-05-14
CH212536A (de) 1940-11-30
DE717159C (de) 1942-02-07
BE434733A (de)
FR855803A (fr) 1940-05-21

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