US2270176A - Radio receiving apparatus - Google Patents

Radio receiving apparatus Download PDF

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Publication number
US2270176A
US2270176A US296578A US29657839A US2270176A US 2270176 A US2270176 A US 2270176A US 296578 A US296578 A US 296578A US 29657839 A US29657839 A US 29657839A US 2270176 A US2270176 A US 2270176A
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US
United States
Prior art keywords
motor
contact
depressed
relay
cam
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
US296578A
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English (en)
Inventor
Johannes Antonius Van Lammeren
Alexis Van Dam
Vivie Wilhelmus Lamb Leonardus
Knos Gunnar Borge
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RCA Corp
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RCA Corp
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Publication date
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Publication of US2270176A publication Critical patent/US2270176A/en
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    • 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
    • H03J5/14—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 auxiliary power
    • H03J5/20—Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power
    • 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
    • H03J5/14—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 auxiliary power
    • H03J5/18—Settings determined by a number of separate positioning means actuated by electromagnets

Definitions

  • the present invention relates to a remote control arrangement for radio receiving apparatus provided with push button tuning.
  • the keys provided in the receiver proper are arranged in a row and parallel with this row is provided a shaft to which-are secured a number of cams by means of which .upon one revolution of the shaft the keys are pressed successively.
  • the keys provided in the receiver proper are arranged about a shaft carrying a cam by which the keys are pressed successively upon one revolution of the shaft.
  • the selective device preferably consists of a row of contacts each of which corresponds to one of the keys provided in the receiver proper and along which travels a contact arm which is driven from the motor and runs. in synchronism with the said shaft; upon operation of the station se-, lector one of the contacts receives a potential different from that of the other contacts, the
  • each key provided in the receiver proper carries a member which can be adjusted by means of a magnet; upon choosing the station corresponding to the key in question this magnet is energized and shifts the member so that the key is pressed through the intermediary of the element and of the member.
  • Figures 1 and. 2 are wiring diagrams of one form of construction according to the invention.
  • Fig. 3 shows schematically the mechanical part of this form of construction.
  • Fig. 4 is a detail view of a circuit arrangement for tuning by means of push buttons.
  • Fig. 5 shows a secondform of construction of the invention
  • Figs. 6 and 7 represent a third form of construction.
  • Fig. 1 shows a keyboard 4
  • the motor 42 is also adapted to operate the tuning means.
  • a cam shaft is provided which is denoted by 43 and the number of cams 2
  • These cams are radially shifted with respect to each other so that upon rotation of the shaft 43 the keys 3
  • the cams are so spaced that there is never more than one key depressed at any one time.
  • the motor 42 also drives the tuning means, a mechanical coupling must be provided at least between the cam shaft 43 and the motor 42, which coupling can be engaged and disengaged. Moreover, it is desirable that the mechanical coupling between the motor and the tuning means may be engaged and disengaged.
  • a mechanical coupling must be established between the motor 42 and the cam shaft 43;
  • the motor 42 must be put into service.
  • Relay 44 For carrying out these operations a relay 44 is provided which effects the required electric operations as well as the required mechanical operations.
  • Relay 44 is arranged so as to operate the change-over contacts 45 and 45, and also to shift the toothed wheel on the shaft 3
  • toothed wheel 58 meshes with the toothed wheel 5
  • the cam shaft 43 has mounted on it a contact arm 41 which is arranged to travel over a number of contacts II to 29.
  • the ten contacts I to 29 are connected through ten conductors (only three are shown in Figure 1 so as to simplify the description) to the press button operated switches 2-5 etc., associated with the keyboard 4
  • the press buttons (see 381, 388, and 3
  • the latching device operates a contact 48 so that upon depression of one of the press buttons contact 48 is closed momentarily due to displacement of lock bar 303 to the left.
  • the relay 44 is cut out and changes over the -motor 42 upon the change-over contact 45 resuming its left hand position which is its position of rest- Furthermore, the mechanical coupling rupted and the mechanical coupling between the motor 42 and the variable condensers is reestablished.
  • the key corresponding to the press button 5 has been depressed by the corresponding cam 25 in the reached position of rest of the cam shaft 43. This depressed key 35 initiates the tuning operation.
  • Depression of key 35 acts through the mechanism shown in Fig. 4 and described in more detail hereinafter, to cause the motor 42 to operate and bring the variable condense-rs into the desired position, the position of the selected change-over contact 50 shown in Fig. l determines the direction in which the tuning means is driven by the motor.
  • Fig. 2 represents a simplified construction of the circuit arrangement shown in Fig. 1, corresponding parts of the circuit bearing the same reference numbers.
  • the differencebetween the circuit arrangements shown in Figs. 1 and 2 consists in that in Fig. 1 the depression of one button brings about the closure of a switch, whereas in Fig. 2 the depression of one of the buttons between the motor 42 and cam shaft 43 is interopens a switch.
  • the construction shown in Fig. 1 is simplified in that the latch contact 48, as well as the contact 46 which is operated by the relay 44 and acts in parallel with the latch contact 48, can be dispensed with. Since, moreover, the relay 44 is not short-circuited, as is the case in Fig. 1, but is put out of circuit, the incandescent lamp 49 may be omitted, thus obtaining a saving in energy.
  • the contact row H to 20 shown in Fig. 2 differs from the row bearing the same reference numbers and shown in Fig. 1 only in that the contacts H to 20 in Fig. 2 have a very small intermediate space such that the contact arm on passing from one'tothe other contact is connected to both contacts.
  • All of the contacts II to 29 are connected respectively through the switches to It! operated by the press buttons and through the relay 44 to the terminal 51.
  • the contact arm 41 connects with the terminal 58. Between these terminals 55 and 51 is connected the supply for the relay 44. Consequently, the relay 44 is de-energized only if the contact arm 41 reaches a contact which is connected to an open switch. If, for instance, the press button 5 is depressed the switch 5 is opened and the contact
  • Fig. 4 illustrates how the variable condensers can be brought into a predetermined position.
  • the condenser shaft has adjustably mounted on it a disc I I2, provided with two peripheral edges having a diflerent radius which edges each extend, for instance, through 180 and are separated from each other by a cavity 3, viz. the
  • a spring 233 clamped at a point 232 carries a Ieeler II3 whose bottom side bears on' one of the peripheral edges III or I33 if the spring 233 is depressed.
  • the cam 25 acts on a lever 35 which is pivoted at 233, it being remarked that a plate spring 243 provided between the lever 35 and the spring 233 exerts a downwardly directed pressure on the spring 233 if the lever 35 is depressed by the cam 25.
  • contact springs I43 and I45 are provided which are furnished with contacts 3
  • a contact 63 which alternatively bears on the contacts 6I and 62 and is supported in an insulated manner by aprojecting part I44 provided on the spring 233. 1
  • Another projecting part I43 provided on the spring 233 is located between two contact springs I41 and I42 and, in the position of rest illustrated, it spaces from each other the contacts 236 and 231 provided on the contact springs HI and I42. Even in the lowest position of the pro- Jecting part I43 the switch 236, 231 constituted by these contacts is open.
  • the stator of the tuning motor is equipped with two windings which are wound in opposition and'are spatially displaced with respect to one another. The mains voltage is connected between the junction of these windings and contact spring I, whereas contact spring I42 is connected to a contact 63. The two remaining ends of the motor windings are connected to the contact springs I43 and I45 and interconnected through a condenser. As a result 01 this the motor, if the switch 236, 231 is closed and the contacts 63 and 6
  • Fig. 5 shows another form or construction of the invention,
  • the tuning means consist of a number of slide condensers one of which is represented in the drawing and designated by I63.
  • the capacity variation is effected by displacement of the rod I6I in a' longitudinal direction against the force of a suitable returning spring (not shown) by pushing against a plate I62 secured to the rod
  • the pressure on the plate I62 may occur either by means of a number of adjustable pins I63, I64 of diiIerent length or by means of a rod 65 which by turning a knob 66 can be moved upwards and downwards in a nut 61/ by means of a screw thread which may have a variable pitch.
  • the knob 63 When tuning by means of a motor the knob 63 is drawn out as a result of which the nut 61 closes the contact 63 and is kept in place by the spring 63.
  • the rod 65 stands free from th plate I62, whereupon the condenser can be adjusted with a motor 13 by means of the pins I63, I64.
  • the motor 13 is mechanically coupled by means of a toothed wheel H to a toothed wheel 12 provided'with a cam, which turns above the heads 01 the pins I63, I64, and moreover with a toothed wheel 14 or the same size which is secured with the contact arm 15 to a shaft, the heads of the pins I63, I34 playing the same part as the keys M to 43 in Fig. 3.
  • This contact arm 15 passes in synchronism with the -cam 13 over a number ofcontacts 16, 11, 13, 13
  • the condenser 35 in the motor 13 can be short circuited through these contacts, the contact arm 15 and the strip 32, due to which the motor begins to operate as'an' electric brake, since the initial rotary field changes to an alternating field. It, for instance, the press button 31 is pressed the motor 13 begins tooperate and the rotor of the motor is drawn into the field of the stator, the contact; arm 15 now passing over the contacts'. Upon reaching contact 11 the condenser 35 is'short circuited owing to which the'motor stops in this position. In this case the cam 13 hasdepressed one or the pins I63 and I34 thus securing a definite final position for the slide condenser.
  • Figs. 6 and 7 represent a third embodiment of the invention.
  • Fig. 6 is a schematical detail view of the mechanism in the receiver proper, whereas Fig. 7 shows the circuit arrangement of this form, of construction.
  • the receiver proper comprises a number of keys, th'e'receiving set upon depression of one of these keys being tuned to the station to which the de- I pressed key in question was previously adjusted.
  • the depression of the keys is effected again by means of a cam shaft provided above the keys, but now through the intermediary of a pawl secured to each key.
  • a magnet which on bein energized attracts the pawl secured to this key, as the result of which the key can be depressed by a cam provided above the same.
  • a key board comprising a number of press buttons I2I, I22 and I23 is denoted by I; this board is separated from the receiver and placed at a smaller or larger distance therefrom.
  • the receiver comprises a number of magnets I26, I21 and I20 corresponding to the number oi. keys.
  • the receiver comprises contacts III, I32, I33.
  • a conductor leads to a corresponding magnet which in its turn is connected in series with the corresponding contact; the circuit can be closed through a relay I which is common to all conductors, a tuning motor I36, the alternating current main Interposed between the terminals I31 and I38 and a common return lead to the press buttons.
  • the said circuit is closed through the magnet I26, the contact I3I still closed at the moment of the depression, the relay I40, the tuning motor and the alternating current mains, as result of which the magnet I26 and the relay I40 are energized and the tuning motor I36 begins to operate.
  • the function of the relay I40 is to interrupt the mechanical coupling between the tuning motor I36 and the tuning'means and to establish a mechanical coupling between the tunin motor I36 and the cam shaft provided above the keys to be pressed.
  • This cam shaft is designated by I02 In Fig. 6.
  • the cam shaft I02 moves and the cams provided thereon, which are displaced in the direction of rotation with respect to one another and one of which is denoted by I03 in the drawing, depress the pins located below the cams.
  • One of the keys referred to with corresponding pawl, magnet and pin is represented in Fig. 6.
  • the key consists of the lever 35.
  • the pawl is designated by IOI, the magnet by I26 and the pin by I04.
  • the key is pivoted at 233 and bears with a spring 240 on a clamped spring 233.
  • the desired station is chosen in the manner set out with reference to Fig. 4.
  • the reference numbers of the parts of the circuit arrangement are the same as those of corresponding parts in Figs. 4 and 7.
  • the motor I36 is mechanically changed over to the tuning means by the relay I40 whose armature is no as to adjust the controlling means to predetermined diii'erent positions, an operable cam device acting upon operation to operate the selectively operable devices in a predetermined sequence, means including said motor for operating the cam device, a control unit including a plurality of auxiliary selectively operable devices corresponding to said first named plurality of selectively operable devices, each thereof acting upon operation to first cause disconnection of the motor from said adjustable controlling means and connection thereof to said cam device and cause the motor to drive the cam device to a position at which the corresponding one of said first named plurality of selectively operable devices is operated by the cam device, means acting on the attainment of said position to cause disconnection of the motor from said cam device and connection thereof to said adjustable controlling means, said motor acting upon its being coupled to said controlling means to adjust the same to the adjustment called for by
  • signaling apparatus including an adjustable controlling element, a motor normally coupled to said controlling element for operating the same and. selectively operable means acting upon selective operation thereof to control the operation of the motor and thereby effect the adjustment of said element to predetermined different positions, an adjustable selector device for operating said selectively operable means in a predetermined sequence, and auxiliary selectively operable motor control means acting upon selective operation thereof to connect said motor to said selector device and control the -operation of the motor to thereby effect. the adjustment of said selector device to predetermined different positions.
  • signaling apparatus including an adjustable controlling element, a motor normally con- 'nected to said element for operating the same and selectively operable means acting upon selective operation thereof to control the operation of the motor and thereby effect the adjustment of said element' to predetermined different positicns, an adjustable selector device for operating said selectively operable means, said selector device having a different operating position for each of said selectively operable means, a plurality of auxiliary selectively operable means corresponding respectively to the difler'ent positions I of said selector device, each of said last named means acting upon operation thereof to disconnect the motor from the controlling element,
  • auxiliary selectively operable motor control means acting upon selective operation thereof to effect disconnection of the motor from the tuning element and connect the same to said selector device and control the operation oi the motor so as to adjust said selector device to a desired one of itspositions, and means acting upon adjustment of the selector device to the desired position for re-establlshing the connection between the motor and the tuning element whereby said tuning element is adjusted to the desired position.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Control Devices (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
US296578A 1938-09-26 1939-09-26 Radio receiving apparatus Expired - Lifetime US2270176A (en)

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Application Number Priority Date Filing Date Title
DE532860X 1938-09-26

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US2270176A true US2270176A (en) 1942-01-13

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US296578A Expired - Lifetime US2270176A (en) 1938-09-26 1939-09-26 Radio receiving apparatus

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US (1) US2270176A (en))
BE (1) BE436509A (en))
FR (1) FR862368A (en))
GB (1) GB532860A (en))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465956A (en) * 1946-02-11 1949-03-29 Michel N Yardeny Integrating control device
US2511727A (en) * 1947-09-13 1950-06-13 Control Instr Co Inc Automatic switch positioning device
US2526628A (en) * 1948-04-05 1950-10-24 Harry D Belock Remote controlled positioning system
US3280269A (en) * 1963-06-28 1966-10-18 Bell Telephone Labor Inc Shaft positioning system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465956A (en) * 1946-02-11 1949-03-29 Michel N Yardeny Integrating control device
US2511727A (en) * 1947-09-13 1950-06-13 Control Instr Co Inc Automatic switch positioning device
US2526628A (en) * 1948-04-05 1950-10-24 Harry D Belock Remote controlled positioning system
US3280269A (en) * 1963-06-28 1966-10-18 Bell Telephone Labor Inc Shaft positioning system

Also Published As

Publication number Publication date
GB532860A (en) 1941-01-31
FR862368A (fr) 1941-03-05
BE436509A (en))

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