US2890450A - Radio receiver antenna switching device - Google Patents

Radio receiver antenna switching device Download PDF

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Publication number
US2890450A
US2890450A US397655A US39765553A US2890450A US 2890450 A US2890450 A US 2890450A US 397655 A US397655 A US 397655A US 39765553 A US39765553 A US 39765553A US 2890450 A US2890450 A US 2890450A
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US
United States
Prior art keywords
antenna
radio receiver
tuning
omnidirectional
switching 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
US397655A
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English (en)
Inventor
Berlinghoff Franz
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2890450A publication Critical patent/US2890450A/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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching

Definitions

  • the present invention relates to a radio receiver antenna switching device. More particularly, the invention relates to a radio receiver of the type comprising a directional antenna and an omnidirectional antenna and to a switching device therefor.
  • radio apparatus preferably in the form of a ferrite-rod antenna.
  • a directional antenna preferably in the form of a ferrite-rod antenna.
  • stations which, although they may be widely remote from one another geographically, nevertheless tend to interfere with each other especially in intermediate ranges in the evening hours.
  • the use of a preferably rotary directional antenna often permits an interfering station to be strongly suppressed so that the desired station is better received.
  • the omnidirectional antenna may be for example, a supply line antenna, an auxiliary antenna incorporated in the receiver, an indoor antenna or an outdoor antenna.
  • To operate the omnidirectional antenna it is not absolutely necessary to disconnect the directional antenna. With the omnidirectional antenna on it will often do to connect the directional antenna, for' example capacitatively, to the grid of the input tube, the energy thus received from a station in the minimum direction of the directional antenna being sufficient to make it perceptible.
  • a tuned directional antenna When disconnecting the omnidirectional antenna a tuned directional antenna may remain operative as an input circuit and, for example, a tapping or an additional winding on the directional antenna, permits impedance matching of the omnidirectional antenna.
  • a rotary ferrite-rod antenna is usually incorporated in a radio receiver as a directional antenna.
  • the advantages accruing from the invention are, however, also obtained with an apparatus which comprises a fixed directional antenna in its cabinet and consequently must be turned as a whole for direction finding, for example, in the case of portable receivers.
  • Changing over of the antenna is preferably effected automatically by operating a member for tuning and/or ice adjusting the directional antenna, the tuning member preferably being stopped with operative directional antenna.
  • the stopping may, for example, result from braking a flywheel or the like.
  • the force exerted in the stopped condition on the tunmg member (tuning knob) on operating the latter may serve to change over to the omnidirectional antenna and to release.
  • the release is preferably effected by axial displacement of the tuning member.
  • Flg. 1 is a schematic diagram of an embodiment of the antenna switching device of the present invention.
  • Fig. 2 is a schematic diagram of another embodiment. of the antenna switching device of the presentinvention.
  • Fig. 1 shows a device for a radio receiver with a directional antenna.
  • an omnidirectional antenna is connected automatically by operatmg the tuning knob, and a separate switch, for example a press-button, is used for changing over from omnidirectional to directional reception.
  • The. directional antenna connected to the tuning member is stopped by means of braking a flywheel or the like.
  • Fig. 1 illustrates the condition in which the omnidirectional antenna (not shown) is connected via soldered joints 2 by means of a diagrammatically represented switch 1 and the tuning element, for example a rotary capacitor, is freely controllable by means of a knob 3 and a cord .4.
  • a radio receiver R has a rotatable ferromagnetic rod directional antenna D and an omnidirectional antenna 0 which is connected automatically to the tuning mechanism of the receiver.
  • the knob 3 is mounted on a solid shaft 5 which passes through a hollow shaft 6.
  • a stud 12 fitted secured to the shaft 5 is guided in a substantially V-shaped slot 11 and maintained at the point of the V by the force of spring 7 in the rest position and also during normal tuning.
  • the hollow shaft 6 carries a flywheel 13.
  • a press-button 21 is operated (Fig. 1) by pushing a rod 22 "against the force of a spring 23 resting at one end on the plate 24 and at its other end on a ring 25 and a pin 26 secured to the rod 22.
  • the toggle lever 27 is then carried along with the pin 29, secured to rod 22, by means of the eye 28, the spring-loaded tipping device 30 finally being tripped and the upper end of the lever 27, which end is furnished with a brake lining 31, engaging the flywheel 13. Due to the shape of the eye 28 the tilting of the lever 27 is abruptly effected independently of the degree or rate of pressing the button 21.
  • the lug 32 snaps under the projection 33 of the stopping lever 34 which is pivotally supported in its fulcrum where it is subjected to the action of a spiral spring 35.
  • the antenna switch 1 is operated by pushing the rod 22. Said rod also passes through a chassis plate 36 or the like.
  • the directional antenna' is operative and the flywheel of the tuning member 5, 6 has been braked via the lever 27 with lining 31, thus incapacitating the tuning element, for example, a rotary capacitor, during any rotation of the directional antenna.
  • the tuning knob 3 When a different station is chosen the tuning knob 3 is turned, as usual, in one or in the other direction. Since the hollow shaft 6 is stopped as a result of the braking of the wheel13, the stud 12 moves into the V-shaped slot 11, thus-axially displacing the rotating shaft in the direction of its flywheel end. In this manner, the lever 34 is actuated and the rod 22 is released. The rod 22 moves downwardly and carries along the lever 27 by means of the pin 29, thus releasing the tuning member to permit free tuning. The rod 22 in its downward movement along with the press-button 21 also operates the switch 1 which, in turn, connects the omnidirectional antenna.
  • axial displacement occurs automatically on operating the mechanical tuning member in the stopped condition, so that the antenna is changed over and the wheel 13 is no longer braked.
  • the tipping device 30 causes the engagement and lifting of the brake lever 27, 31 to occur abruptly, thus avoiding in operativeness of tuning and ensuring reliable operation of the device.
  • Fig. 2 shows a device for a receiver comprising a directional antenna, in which on the one hand engagement .of the omnidirectional antenna is effected automatically, on operating the tuning member and on the other hand changing over to the directional reception is efiected automatically on operating the member for rotating the directional antenna.
  • a tuning element for example, a rotary capacitor, not shown
  • a similar contact member 3, 5, 6' is shown, thus permitting a directional receiving antenna (not shown) to be turned by means of a cord 4'.
  • brake wheels 13 and 13, respectively Secured to the hollow shafts 6 and 6' are brake wheels 13 and 13, respectively, of which at least one may be a flywheel.
  • a brake lever 41 with brake lining 42 is urged against the wheel 13 or the wheel 13'.
  • the brake lever 41 is actuated via intermediate levers 43 and 43' to stop each time the inoperative adjusting devices 6, 4 and 6', 4, respectively.
  • the omnidirectional antenna is connected by a diagrammatically represented antenna switch 44, the directional antenna being connected in the opposite condition.
  • a switching device for selectively connecting an omnidirectional antenna. to a radio receiver connected to a directional antenna and having tuning means for selecting a desired frequency, comprising means operated by said tuning means for automatically connecting said omnidirectional antenna to said radio receiver and means for disconnecting said omnidirectional antenna from said radio receiver.
  • a switching device for selectively connecting an omnidirectional antenna to a radio receiver connected to a directional antenna and having tuning means for selecting a desired frequency, comprising means operated by said tuning means for automatically connecting said omnidirectional antenna to said radio receiver, means for disconnecting said omnidirectional antenna from said radio receiver, and means operated by said disconnecting means for stopping said tuning means when said disconnecting means is operated to disconnect said omnidirectional antenna from said radio receiver.
  • a switching device for selectively connecting an omnidirectional antenna to a radio receiver connected to a directional antenna and having tuning means for selecting adesired frequency, said tuning means comprising a rotary member having a flywheel affixed thereto, comprising means operated by said tuning means for automatically connecting said omnidirectional antenna to said radio receiver, means for disconnecting saidomnidirectional antenna from said radio receiver, and braking means adapted to coact with said flywheel and operated by said disconnecting means to contact the said flywheel when said disconnecting means is operated to disconnect said omnidirectional antenna from said radio receiver.
  • a switching device for selectively connecting an omnidirectional antenna to a radio receiver connected to a directional antenna and having tuning means for selecting a desired frequency, said tuning means comprising a rotary member, comprising means operated by said tuning means for automatically connecting said omnidirectional antenna to said radio receiver, means for disconnecting said omnidirectional antenna from said radio receiver, and means operated by said disconnecting means for stopping said tuning means when said disconnecting means is operated to disconnect said omnidirectional antenna from said radio receiver, said rotary member being mounted in cooperating relationship with said means for stopping said tuning means in a manner whereby a force applied to said rotary member in the stopped condition of said tuning means causes said stopping means to become inoperative and operates said means for connecting said omnidirectional antenna to said radio receiver.
  • a switching device for selectively connecting an omnidirectional antenna to a radio receiver connected to a directional antenna and having tuning means for selecting a desired frequency, comprising means operated by said tuning means forautomatically connecting said omnidirectional antenna to said radio receiver and pushbutton switching means for disconnecting said omnidirectional antenna from said radio receiver.
  • a switching device for selectively connecting an omnidirectional antenna to a radio receiver connected to a directional antenna and having means for rotating said directional antenna and tuning means for selecting a desired frequency, comprising means operated by said tuning means for automatically connecting said omnidirectional antenna to said radio receiver and means operated by said directional antenna rotating means for automatically disconnecting said omnidirectional antenna from said radio receiver.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Structure Of Receivers (AREA)
US397655A 1953-03-18 1953-12-11 Radio receiver antenna switching device Expired - Lifetime US2890450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP9391A DE938854C (de) 1953-03-18 1953-03-18 Funkempfangsgeraet mit umschaltbarer Richt- und Rundantenne

Publications (1)

Publication Number Publication Date
US2890450A true US2890450A (en) 1959-06-09

Family

ID=6659836

Family Applications (1)

Application Number Title Priority Date Filing Date
US397655A Expired - Lifetime US2890450A (en) 1953-03-18 1953-12-11 Radio receiver antenna switching device

Country Status (4)

Country Link
US (1) US2890450A (enExample)
DE (1) DE938854C (enExample)
GB (1) GB756473A (enExample)
NL (2) NL97178C (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255985A (en) * 1977-12-14 1981-03-17 Hesston Corporation Bale-accumulating trailer
CN116387831B (zh) * 2023-04-27 2025-12-23 哈尔滨工业大学（威海） 一种可快速转动的大口径射电圆面天线系统及其使用方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282030A (en) * 1937-09-17 1942-05-05 Int Standard Electric Corp System of guiding vehicles
US2659082A (en) * 1946-04-30 1953-11-10 Paul A Pearson Radio direction finder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578301A (en) * 1942-07-31 1946-06-24 Int Standard Electric Corp Improvements relating to radio direction finders

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282030A (en) * 1937-09-17 1942-05-05 Int Standard Electric Corp System of guiding vehicles
US2659082A (en) * 1946-04-30 1953-11-10 Paul A Pearson Radio direction finder

Also Published As

Publication number Publication date
DE938854C (de) 1956-02-09
GB756473A (en) 1956-09-05
NL97178C (enExample)
NL185925B (nl)

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