US2276724A - Radio receiver - Google Patents

Radio receiver Download PDF

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Publication number
US2276724A
US2276724A US332920A US33292040A US2276724A US 2276724 A US2276724 A US 2276724A US 332920 A US332920 A US 332920A US 33292040 A US33292040 A US 33292040A US 2276724 A US2276724 A US 2276724A
Authority
US
United States
Prior art keywords
shaft
tuning
key
bail
keys
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
US332920A
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English (en)
Inventor
Horowitz Alexandre
Fennema Pieter Harm
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 US2276724A publication Critical patent/US2276724A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D203/00—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom
    • C07D203/04—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D203/06—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D203/08—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring nitrogen atom
    • C07D203/14—Heterocyclic compounds containing three-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring nitrogen atom with carbocyclic rings directly attached to the ring nitrogen atom
    • 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

Definitions

  • Radio-receivers adapted to be automatically tuned to a plurality of pre-determined stations with the. aid of a number of keysprovided with adjustable. stops or similar members are known in different constructions.
  • the known constructions have, however, the drawback of being. irequentlyvery complicated whilst in other cases the keys have .to be depressed over a rather large distance-to. obtain the desired tuning, which has to be regarded as a disadvantage for the operating person.
  • Such a tuning .system. has, .in additionv to the small space required in the casing, the further advantage that owing to the rotary motion of the keys the friction in the mechanism issmall.
  • the shafts about which the station keys are rotatable should be located in one line.
  • this shaft for. example, immediately behind one of the walls of the set, it becomespossible to cause. the keys to protrude, 'for example,
  • Theasseihblage of the tuning .mechanism .in the'set according to the invention may, be very compact when proceeding in accordance with one convenient embodiment of the invention wherein a bail which is common to all the keys and which transfers" the :motion of these keys to the tuning condenser is" arranged so as to .berotatable, preferably, about the j common geometrical axis'of rotation of the keys or about a shaft in r the immediate vicinity of the said axis,
  • the tuning condenser is formed as a slidableelectrode condenser, it is'advisable to arrange the shaft of the tuning condenser'so as to be perpendicular to the shaft of the swing. This-affords, on the one hand, the advantage that in --theset but a very small space is occupied by the tuning-mechanism and the-tuning condenser range on the geometricaxis of rotation of the Whilst; on. the.
  • the devices for adjusting'the two adjustable *stops provided on a key with respect to one another in such manner that in the non-depressedcondition of a key the one adjusting device and in the depressed condition of this key the other adjusting device can be operated through the same aperture of the casing of the set.
  • the adjusting devices may be adjusted, for example, with the aid of, a screw- I 7 driver.
  • rotatable for example rotatable, is subject to the action of a spring and maintains a depressed key in this position.
  • theradio-receiver which comprises one common bail for the operation of the tuning condenser and a second bail forthe operation of the wave-length switch
  • it is ad-' visable, in accordance with the invention, to arstation keys a few other keys which co-operate exclusively with the bail of the wave-length switch.
  • the advantage is thus obtained that for the wave-length switch use is made of the wave-length switch mechanism which is present already for the station keys, whilst the outward appearance of the set is improved owing to the fact that the? station keys,
  • the keys of the wave-length switch all have the same aspect and, if desired, may all be arranged in one row.
  • Fig. 1 represents in perspective the tuning mechanism of a radio-receiver according to the invention whilst Figs. 2 and'3 show a modified form of the invention with mutually different positions of the operating member of the swing of the wave-length switch.
  • the tuning keys I and II] in the set are all of them adapted to turn on a hollow shaft 5'by means of bush-es 4.
  • the figure shows only two keys. viz. the key I which serves to tune the set to a determined station and the key I which serves exclusively to change-over the set to either of the two wavelengths, which key is utilised, for example, in the case wherein a tuning condenser 38 is adjusted by means of. a hand turning knob, that is to say in the usual manner.
  • the hollow shaft surrounds another shaft 28.which carries a tuning swing constituted by side-pieces 3
  • the hollow shaft 5 is rigidly mounted in supports 34 and 35 whereas the shaft 28 is adapted to turn in the hollow shaft 5 andcarries at one of its ends an angle lever 29 which actuates thejrod 30 of a pointer mechanism and at its other end an angle lever 36 which bears against theslidable shaft 37 of a slidable-electrode condenser 38.
  • the shaft 37 is subject to the action of a spring 37a. which always tends to push the sliding shaft forwards.
  • the supports 34 and 35 have furthermore rotatably journalled in them the bail of the wavelength switch.
  • This bail comprises a shaft 25 on which is mounted the rotor 39 of a wavelength switch the stator of which is denoted by 49.
  • the shaft 25 carries two side-pieces 26 and 21 of the bail which are connected to one an- .other by means of rods 23 and 24.
  • Figs. 2 and 3 represent the key construction more'clearly. These figures show the side-pieces 2 and 3 of the key which are connected to one another by means of pins 6 and 45 whilst the .bush 4 acts at the same time as a connecting piece between the said side-pieces.
  • the latter may be made,for example, of plate-shaped material.
  • a guidepiece 42 provided, in two raised tags 42a and 4%,
  • the pin 6 has pivotally mounted on it a member I which is located between the side-pieces 2 and 3. Owing to the action of a spring 44 bail for the wave-length switch.
  • the member I is constantly pressed into the position shown in Fig. 2 so that, upon depressing the key, the hook 8 is inoperative whereas when the key is depressed the stop 9, which is also located on the member 1, functions.
  • the figure further shows the bail for the wavelength switch, of which bail the connecting rods 23 and 24 and the shaft 25 are represented in cross-section and the side-piece 2'! in lateral elevation.
  • the bail of the wave-length switch moves from the dotted position, in which solely the position of the connecting rods 23 and 24 is shown, into the position shown in full lines until the said bail engages a fixed stop 50.
  • the shaft 25 has turned through a certain angle with the result that, as has appeared already from Fig. 1, the rotor 39 of the wavelength switch is turned.
  • the key I When being depressed the key I has a limited motion since at a given moment the stop 47, which is rigidly secured to the side-piece 3 of the key, butts against the shaft 25.
  • the part I9 of the side-piece 33 Upon depression the part I9 of the side-piece 33 has pressed downwards the part 2
  • the member 7 may be brought in its other position by screwing a stud bolt I I in the turnedover part I6 of the side-piece 3 with the result that the shoulder I5 against which bears the head of the stud bolt I1 engages the part I6. Owing to this motion the spring 44 is stretched, the stop 9 leaves the path of the connecting rod 24 whilst the path of the hook 8 comes to lie in the path of the connecting rod 23.
  • the bail for the wave-length switch is brought from the drawn position into the dotted position until the side-piece 21 engages the stop 5I. With this motion of the key the bail 33 for the tuning mechanism is displaced in a similar manner as described with reference to Fig. 2 owing to the action of the adjusting.
  • the distance over which the adjusting screw is screwed into the member 42 determines the length of the motion of the tuning bail 33.
  • each key may be appropriated in the set for each station. To that end it is only necessary to determine the wave-range to which belongs the station concerned with the aid of the screw I1 and, by means of the screw 4
  • the part I which is rotatable with respect to the key, may be omitted; one of the side-pieces 2 or 3 acts in this case, by means of a part which is rigid with respect to these side-pieces, on the rod 24 of the
  • the keys of Fig. 1 are shown in the drawing slightly different from the keys of Figs. 2 and 3.
  • the adjusting mechanism for the wave-length switch is located above the adjusting mechanism for the wave-length, which is exactly the reverse in Figs. 2 and 3 although the principle is the same.
  • a radio tuning instrumentality a fixed hollow shaft; a tuning shaft rotatably mounted within said fixed hollow shaft; a member rotatably mounted on said fixed hollow shaft and comprising a bushing surrounding said fixed hollow shaft, an arm integral with said bushing and extending in a plane normal to the axis of said shaft; a lever operable in a plane normal to said axis; a rocker mounted on said tuning shaft; an adjustable stop on said arm adapted to engage said rocker upon depression of said lever; and means for holding said rocker in contact with said stop when said lever is depressed, whereby said rocker is rotated to a predetermined angular position.
  • a radio tuning device including a second arm integral with said bushing having an adjustable stop adapted to contact a second rocker mounted on a third shaft to actuate wave band switching mechanism when said lever is depressed.
  • a radio tuning device including a releasable lock to hold said member in its depressed position.
  • a radio tuning instrumentality the combination of a fixed hollow shaft; a plurality of members rotatably mounted on said fixed hollow shaft, and comprising bushings surrounding said fixed hollow shaft, a plurality of arms, one for each bushing and integral therewith extending in a plane normal to the axis of said fixed hollow shaft and a plurality of levers, one for each of said bushings, extending in a plane normal to the axis of said fixed hollow shaft; a tuning shaft rotatably mounted within said fixed hollow shaft having a rocker mounted thereon; adjustable stops on each of said arms adapted to engage said rocker upon the depression of any one of said levers; and means for holding said rocker in contact with the corresponding adjustable stop when any one of said levers is in its depressed position, whereby said tuning shaft is rotated to a predetermined position.
  • a radio tuning device including a releasable latch to hold one of said levers in its depressed position.
  • a radio tuning device including a plurality of additional arms having adjustable stops, one for each of said bushings and integral therewith, adapted to contact a second rocker mounted on a third shaft whereby when one of said levers is depressed said third shaft is rotated to a predetermined angular position, and wave band switching mechanism fixed to said third shaft.
  • a radio tuning instrumentality a plurality of push button devices adapted to rotate about a given axis, said devices being mounted in a row along said axis, a tuning shaft concentric with said axis, a rocker on said tuning shaft, a plurality of arms, one for each of said push button devices and integral therewith, and adjustable stop means on said arms adapted to contact said rocker whereby said tuning shaft is rotated to a predetermined angular position by the opera tion of one of said push button devices.
  • radio controlling apparatus in combination a rotatable shaft, a member rotatably mounted on said shaft, said member including an arm extending in a plane substantially normal to the axis of the shaft, a bail fixedly mounted on said shaft for rotating the shaft, an adjustable stop means mounted on said arm and positioned so as to engage and operate said bail upon rotation of said member, a secondrotatable shaft and adjustable means mounted on said member independent of said stop means for rotating said second shaft to a predetermined position upon rotation of said member.
  • a control device a fixed hollow shaft, a control shaft rotatably mounted within said fixed hollow shaft, an operable member rotatably mounted on said fixed hollow shaft and operable between two angular positions, said member including an arm extending in a plane substantially normal to the axis of said shafts, a rocker bar mounted on said control shaft, an adjustable stop member on said arm adapted to engage said rocker bar upon operation of said member and effect the rotation of said rocker bar-to a predetermined angular position, a second member rotatably mounted on said fixed hollow shaft, a second control shaft rotatably mounted a predetermined distance from said first named control shaft so that its axis is parallel with the axis of the first named control shaft, a hook member mounted on said second member and means mounted on said second control shaft cooperating with said hook member for rotating said second control shaft upon rotation of said second member.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
US332920A 1939-05-02 1940-05-02 Radio receiver Expired - Lifetime US2276724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL214061X 1939-05-02

Publications (1)

Publication Number Publication Date
US2276724A true US2276724A (en) 1942-03-17

Family

ID=19778984

Family Applications (1)

Application Number Title Priority Date Filing Date
US332920A Expired - Lifetime US2276724A (en) 1939-05-02 1940-05-02 Radio receiver

Country Status (4)

Country Link
US (1) US2276724A (fr)
CH (1) CH214061A (fr)
FR (1) FR865336A (fr)
NL (1) NL93192C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419968A (en) * 1944-07-26 1947-05-06 Gen Electric Push button tuner for multiband radio receivers
US3136176A (en) * 1960-04-14 1964-06-09 Painton & Co Ltd Control arms for electronic, electrical and other instruments

Families Citing this family (2)

* 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
DE960907C (de) * 1953-09-11 1957-03-28 Blaupunkt Werke Gmbh Drucktastenschalter fuer Bereichs- und Stationsauswahl in Rundfunk- und Fernsehempfangsgeraeten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419968A (en) * 1944-07-26 1947-05-06 Gen Electric Push button tuner for multiband radio receivers
US3136176A (en) * 1960-04-14 1964-06-09 Painton & Co Ltd Control arms for electronic, electrical and other instruments

Also Published As

Publication number Publication date
NL93192C (fr)
CH214061A (de) 1941-03-31
FR865336A (fr) 1941-05-20

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