US2100609A - Control means - Google Patents

Control means Download PDF

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Publication number
US2100609A
US2100609A US715266A US71526634A US2100609A US 2100609 A US2100609 A US 2100609A US 715266 A US715266 A US 715266A US 71526634 A US71526634 A US 71526634A US 2100609 A US2100609 A US 2100609A
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US
United States
Prior art keywords
contact
drum
switch
motor
receiver
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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
US715266A
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English (en)
Inventor
Mitchell Frank Allen
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
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Filing date
Publication date
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Publication of US2100609A publication Critical patent/US2100609A/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
    • H03J5/146—Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached

Definitions

  • the present invention relates to means for controlling and indicating the setting of apparatus for modulated carrier wave reception such, for example, as wireless receivers and provides new or improved means whereby the setting of the apparatus may be controlled and indicated either at the apparatus or from a position remote from the apparatus.
  • the motor has been arranged to rotate in one direction when contact is made with one of the two conducting surfaces of the drum-and inthe opposite direction when contact is made with the other conducting surface.
  • Such an arrangement is not suitable for use in connection with the tuning ot' wireless receivers because it is capable of adjustment to only a certain number of iiXed positions deterfmined by the positions of the contacts which have hitherto been arranged along a line parallel to the drumaxis.
  • the various tuning positions which can be selected should be adjustable with considerable exactitude.
  • the contact breaking device can take place whilst the contacting member is in contact with the insulating zone and means are provided whereby the contact breaking device can be caused to take up a position substantially at one edge ci the insulating zone.
  • Fig. l is a diagram showing the circuit con nections between the various components of remote control apparatus according to the present invention
  • Fig. 2 is a view in elevation showing mecha
  • Fig. 3 is a plan view of a manual control switch shown in Fig. 2 which may be provided upon the wireless receiver itself to enable the way in which the receiver can be used to be adjusted,
  • Figs. il and 5 are end views ci details shown in Fig. 2,
  • Fig. 'l is a plan view of a station selector, of the kind shown in Fig. i, in the :toria ci a oi Europe,
  • Fig. S shows a connecting device whereby the station selector oi Fig. 7 can be connected to the automatic tiuzingjinechanism of Fig. 2,
  • Fig. 9 is an underside View of the map shown in Fig. 7,
  • Eg. lo is a section et Fig. 9 on the line .ir-c2
  • Fig. ll shows a selector plug which may used with the map of l'ig. il or 'the panel ci Fig. l2,
  • Fig. l2 is a plan view of an alternative stasrl tion selector in the fome ci a plain panel
  • Fig. i3 is a plan view of form ci dial which may "ce used with the 'manual control switch shown in v ⁇ Fig. 3,
  • Figs. le and l5 are detail views illustrating operation oi iine tuning
  • Fig. 18 shows a simplified form of mechanism for automatic station finding according to this invention.
  • 32 which is adapted in known manner to tune the various circuits of the receiver to a desired wavelength.
  • carries a toothed wheel 'i8 meshing with a pinion upon the shaft of a knob
  • the setting of the condenser can be read upon a translucent scale lthrough window H2.
  • the scale is illuminated by means of an electric bulb 56A with the aid of a mirror H3.
  • an electrical motor l0 of the induction ldisc type comprising an induction disc 14 carried upon the motor shaft 15.
  • This mot-or is of known type and has a current coil 'll and two potential coils 'l2 and 13.
  • a disc '56 Above the motor there is xed to the motor shaft l5 a disc '56.
  • a second disc Hd is rotatably mounted on the shaft '
  • the disc I Hl carries two pins H6.
  • the motor is rotating the friction between the discs 1B and H4 is sucient to cause one of the pins H6 (ac cording to the ⁇ direction of rotation) to close the two switches l
  • the purpose of the switches Hl and H8 will be described later.
  • is xed a drum
  • T he drum is of insulating material and has two conducting surfaces 83 and 841- thereon. These surfaces are separated from one another along two zones 82 and
  • 20 may be helical or parallel to the drum axis.
  • the zone 82 is arranged to extend around about one quarterI of the periphery of the drum.
  • a cam disc BS co-operating with switch contact blades lllW and HW (seen better in Fig. 1).
  • 05 projecting from the cam disc B5 co-operates with switch contact blades NW1 and 53W.
  • the mechanism is represented diagrammatically as a simple cam. The arrangement is such that contacts MS and HS remain closed excepting at one extreme position of the variable condenser
  • a button 99 serving to operate a switch and a control knob 93 operating switch mechanism also shown in Fig. 3, the view of Fig. 3 being a plan view with the knob 93 and panel IIB removed.
  • the functions of these switches will be described later with reference to Fig. 1 Where they are shown diagrammatically.
  • Fig. 'l a plan view of one form of selector panel 5B which can be used with the apparatus above described.
  • This panel can, if desired, be mounted upon the cabinet of the radio receiver or as shown it can be located at a remote point and connected to the receiver by means of a multi-core flexible cable BT.
  • Fig. 8 a multi-pin plug member 38 which can be plugged into a corresponding socket member 89 xed vat any convenient place upon the radio receiver.
  • the numerals appearing against the various contact Aplugs and sockets indicate the points in the apparatus to which the sufx E.
  • pilot lamp 56 On the selector panel is a pilot lamp 56, a-
  • volume control knob 5l a press button 59 and two additional sockets marked Oi and Gram respectively, the functions of which will be described later.
  • the numerals against these additional sockets also indicate the vpoints to which they are connected.
  • Fig. 9 is an underside view of the selector panel of Fig. 7 with the base removed and Fig. 10 lis a sectional view along the line :zz-x of Fig. 9.
  • the selector panel comprises an upper metal plate 53 which bears the representation of the map. This may for example be embossed. Beneath the plate 53 is fixed an insulating plate 56 having eyelets marked 1E, 1B, etc., as already described according to the selector contacts to which they are connected.
  • the bottom of the panel is constituted by a metal plate 52 which, however, may be covered externally by insulating means since in operation itis at mains poten- 75 alcance
  • is mounted upon four balls 55 arranged in suitable recesses in the underside of the member 5
  • is also restrained by pivot arms
  • the connecting point to the upper metal plate 53 is indicated by SilF and that-to the base plate 52 by reference 3lF.
  • the switch contacts actuated by button 59 are indicated by 2S, iS and 36S, respectively.
  • a rheostat 58 is controlled by the knob 5l and acts as a loudspeaker volume control. Its terminals are indicated by 32E and 33E.
  • a selector plug 6U having an outer insulating casing 63 having fixed within it a central pin 62. Over this pin is arranged a sleeve til which is slidable thereon. The sleeve urged into its lowermost position by a spring Gil. The lower part or" the sleeve 6
  • the mains terminals MG and 3l are connected to a suitable alternating current source and se long as contacts 40S, MS remain closed (that is excepting at one extreme position oi the variable tuning condenser) the primary oi the transformer i225 is energized.
  • the terminals 42T of one secondary winding are connected tothe radio receiver to provide the necessary power for operation.
  • the other secondary winding has its ter-v minals 3H, 33T connected to the-pilot lamps 5b (uponv the selector panel) and 56A (upon the receiver panel). These -lamps indicate when the set is in operation.
  • the circuit arrangement will be best understood by a description of certain examples of its mode of operation.
  • the knob 93 (Fig. 2) will be assumed to be so set that arms 94 and 95 in Fig. l are in the positions shown.
  • a dial which may be associated with the knob Q3 and with the setting above mentioned the word Remote may appear in the dial window in the selector panel as shown in Fig. l.
  • They rst eniect of inserting the plug is to connect top plate 53 (shown beneath the member 54 in Fig. l) with the socket 4B. Further it will cause ⁇ the plate 5l to move sideways and open contacts 35S and as shown. Finally contact will be made between socket @E and base plate 52.
  • the motor coil terminals MM, l lll/i1 and MM2 are permanently connected to the mains terminal il G.
  • the other mains terminal is permanently connected to base plate 52 by wire till/V.
  • a circuit can be traced from the base plate 52 (at mains potential) on the one hand through plate 5ft by wire SlbW, switch contact to contact ring (lli and thence to terminal 35M oi the current coil li, thus energizing the current coil.
  • a circuit can be traced from vplate 52 through socket 3B, by wire 5W, drum contactdc, conducting drum surface tt, contact l0 through wire HW to the terminal lll/i of potential coil l2, thus also completing the circuit through the potential coil l2. It is arranged that for all working positions of the drum ila, the contact 53C remains in contact with surface 84 and contact l@ remains in conn tact with 'surface-r
  • the effect of energizing coils ll and 'l of the motor is to make the motor start up and run in such a direction that the upper surface of the drum M9 moves to the right in Fig. l..
  • the effect yof energizing coils 'il and it on the other hand is in the opposite direction. ⁇
  • switch SiS, 66S energized by switch SiS, 66S.
  • the switches 3IS, 56S and 55S, 56S are closed irrespective of the direction of the motor.
  • the motor would have run in the opposite direction but the switches would still be closed.
  • the contact QB comes to rest upon the insulating zone 52, the circuit of the coil 'I2 is interrupted, the motor comes to rest and switch SIS, MIS opens thereby interrupting the circuit of coil il.
  • the switch 66S, 15S serves to mute the receiver (that is to render it inoperative and silent) during the operation of tuning. This may be done by connecting contact 35S to a suitable point on vthe receiver which is then earthed, through 55S, (ISP, switch arm 55 and wire 35W, whilst the motor is rotating and open circuited again when the motor comes to rest (and when ythe receiver is therefore tuned to the. desired station).
  • the receiver can be muted in any convenient manner, for example by short-circuiting the H. F. or L. F. amplifiers or loudspeaker.
  • the eiect of this is to join wires IW and 30W to wire 3IW and therefore to the mains terminal SIG thus energizing coils 1I and 'I2 and causing the motor to move the top of the drum II9 to the right in Fig. 1.
  • the motor has an ⁇ equal tendency to rotate in opposite directions and it consequently comes to rest with the contact 5C resting just against the edge of surface 84. Since the correct tuning position is obtained when the contact rests against the edge of the groove, the desired station can be accurately tuned in.
  • the rheostat 58 with its control 5l serve to control the volume of sound emitted by the loudspeaker of the receiver.
  • illustrated volume control is effected by arranging the resistance 58 inparallel with the moving coil IQII of the loudspeaker which itself is not illustra-ted.
  • terminals IUI may cepting that the member 5I is not displaced and consequently the switch 35S, 36S is closed. The eifect of this is to connect a suitable source of current 200 connected to terminals 35, 36, across a relay Il which is shown in more detail in Fig. 6.
  • the switch arm 94 is turned. away from stud 30S, the selector panel is disconnected from the receiver. If the arm 94 be moved to stud 4S the same eiect is produced as by inserting the selector plug 60 into the hole 4E in the selector panel in the previous example.
  • the stations selected are long Wave stations.
  • 04 is operated and the stations selected are medium wave stations.
  • the receiver can be tunedA manually to any desired long wave sta-
  • the receiver can be tuned manually to a desired medium wave station because in this position arm 95 is in contact with segment 34P.
  • the switch By turning the switch on to stud
  • the muting switch S, 46S whenhand tuning the muting switch S, 46S is not operative to mute the receiver because arm 05 is then out of contact with ring 4BP. If desired, however, the muting switch may be made operative when hand tuning so long as the tuning knob is being -.rotated by any considerable amount. It can be arranged that small movements of the knob
  • the button S9 provided upon the receiver panel i lill serves the same purpose as button on the selector panel, as will be seen from Fig. l. l
  • Fig. 1 onlyone baule of contacts HCI-l2@ is shown tio-operating with. the drum H9.
  • the groove 82 must run rather more than half way around the periphery of the drum.
  • it is desired to select from a rela tively large number oi stations it may not be con tenient to arrange all the necessary contacts in one row and a plurality or" rows can then be proc1 vided.
  • Fig. 2 two such rows are4 shown and thegroove 82 should then extend around rather a quarter oi' the periphery of the drum.
  • Fig. l2 is shown an alternative :Term which the remote control panel may take.
  • the selector panel may of course take a great variety of other forms.
  • Figs. 16 and 17 illustrate a form of muting switch alternative to that shown in Fig. 4i.
  • the two members 16A and 16B are fixed to the condenser shaft 8
  • a contact member 36S is rotat-n ably mounted on the shaft 8
  • and is held in iric - tional engagement with the member 'ISA by means of a spring H5.
  • a contact member l5 of approximately U-shape is provided and when the condenser shaft is rotated, the member 36S makes contact with one or other limb of the member Il. thereby earthlng the latter member.
  • A are arranged.
  • FIG. 18 A simplified embodiment of the present invention is shown in Figure 18. In this example no provisionis made at the remote-point lor switching the receiver on and oil, for changing the wavelength range orl ior switching the receiver over to the talking machine condition.
  • terminals 3 IG and MG being connected to a suitable A. C. source.
  • a belt or cord drive 19 is shown between the motor lo and the condenser shaft 8
  • the selector plug is in this case asimple wander plug and is connected by a short length oi flexible cable to wire 44W.
  • the effect of inserting the plug 60 into any desired hole, for example HE, is to conneot wire 44W through contact llC and either contact
  • the commute-.tor drum llt may be replaced by a disc comprising two conducting portions ⁇ separated by an insulating Zone.
  • the motor need not necessarily be of the induction disc type. lin some cases it need not loe reversible although it is preferably so. .li the motor is not reversibley only one insulating Zone is provided on the commutator and the commutator 'always rotates in the saine sense. lt comes to rest when the appropriate contact comes to on the :insulating zone..
  • the present invention can of course loe applied to the reception ci television and other signals whether these loe. mltted by radio or in the ⁇ torni oi modulated ca r oscillations along a line.
  • a tuning control means comprising a rotor shaft, a ⁇ frame provided insulation members. a drum secured to said rotor .shaft and mounted in said frame, said drum having a conducting surface divided into two insulated parte by insulating zones, one ci said Lcones being a spiral,
  • each of said insulation zones extends through an angle of at least 90 about the axis of said drum.
  • a radiorreceiver including a high frequency amplifier, means for tuning said amplifier to a desired signal frequency, an electric motor having a drive shaft, a friction clutch including a at' disc secured to said shaft and connected to said tuning means, means for enerf gizing said motor, a circuit connected to short circuit said ampliiier and including a switch, a
  • a radio receiver comprising a tunable circuit including a coil and a variable rotary condenser, an electric motor connected-to said condenser, a circuit for energizing said motor including a switch located at a point remote from said receiver and means located at said remote point connected to short circuit a portion of said coil said means being operatively connected with said switch.
  • a radio receiver comprising a tunable circuit including a coil and a variable rotary condenser, an electric motor, a circuit for energizing said motor including a plate having a plurality of apertures therein, a second plate mounted adjacent said iirst plate, a plug adapted to pass through said apertures and move said seclond plate, switch means operable in response to movement of said second plate and a circuit connected to short circuit a portion of said coil under control of said switch means.
  • a rotary tuning control device an induction motor connected to said device and having a current coil and two potential coils, a circuit connected to energize said cury rent coil and one only of said potential coils to thereby cause rotation of said motor and a switching means mechanically connected to said tuning control device arranged to energize the other of said potential coils additionally to said current coil and said one potential ⁇ coil and thereby cause operation of said motor to cease and a cam connected to said control device and arranged to open said circuit in response to movement of said control device to its extreme position.
  • a radioreceiver comprising a tunable circuit including a coil and a variable rotary condenser, an. electric motor connected to said condenser, -a circuit for energizing said motor including a first switch, said switch comprising two separated metallic plates one of said plates having apertures therein, a plug of good conducting material adapted to be tted into said apertures and to connect said plates, a second switch located near said plug, a member mounted between said plates and arranged to be moved switch arranged to cause a portion of said coil to be short circuited.
  • a radio receiver comprising. a tunable circuit including a coil and a variable rotary condenser, an electric motor, a circuit for energizing saidA motor including a plate having.

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US715266A 1933-03-14 1934-03-13 Control means Expired - Lifetime US2100609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7776/33A GB416435A (en) 1933-03-14 1933-03-14 Improvements in or relating to means for controlling and indicating the setting of apparatus for modulated carrier wave reception

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US2100609A true US2100609A (en) 1937-11-30

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US (1) US2100609A (fr)
FR (1) FR770190A (fr)
GB (1) GB416435A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452384A (en) * 1944-07-14 1948-10-26 Jr Eugene F Mcdonald Automobile radio remote control
US2453252A (en) * 1944-12-05 1948-11-09 Rca Corp Tuning control mechanism for radio receivers
US2582270A (en) * 1945-01-12 1952-01-15 Collins Radio Co Control apparatus
US2677285A (en) * 1950-11-07 1954-05-04 Siemens Ag Speed control apparatus for machine drives
US2857528A (en) * 1955-07-26 1958-10-21 Bertin David Electric switching system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758473C (de) * 1938-10-02 1953-06-01 Sachsenwerk Licht & Kraft Ag Drucktastengesteuertes Rundfunkempfangsgeraet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452384A (en) * 1944-07-14 1948-10-26 Jr Eugene F Mcdonald Automobile radio remote control
US2453252A (en) * 1944-12-05 1948-11-09 Rca Corp Tuning control mechanism for radio receivers
US2582270A (en) * 1945-01-12 1952-01-15 Collins Radio Co Control apparatus
US2677285A (en) * 1950-11-07 1954-05-04 Siemens Ag Speed control apparatus for machine drives
US2857528A (en) * 1955-07-26 1958-10-21 Bertin David Electric switching system

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Publication number Publication date
GB416435A (en) 1934-09-14
FR770190A (fr) 1934-09-10

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