US2251054A - Control circuit - Google Patents

Control circuit Download PDF

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Publication number
US2251054A
US2251054A US246088A US24608838A US2251054A US 2251054 A US2251054 A US 2251054A US 246088 A US246088 A US 246088A US 24608838 A US24608838 A US 24608838A US 2251054 A US2251054 A US 2251054A
Authority
US
United States
Prior art keywords
motor
relays
shaft
source
tuning
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
US246088A
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English (en)
Inventor
Horowitz Alexandre
Johannes Antonius Van Lammeren
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 US2251054A publication Critical patent/US2251054A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1481—Control of position or direction using feedback using an analogue comparing device with discrete position sensor
    • 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
    • H03J1/18—Control by 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
    • H03J5/146—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

  • This invention relates to a wireless receiving set capable of being tuned automatically to a number of predetermined stations by means of a station-selector constituted by a key-board, a selection disc or the like.
  • Wireless receivers having automatic tuning and incorporating a reversible motor for driving the tuning means have been developed in which the shaft of the tuning condensers carries a number of profiled discs each of which corresponds to one of the stations to which the receiver can be tuned automatically.
  • An arrangement of this type is shown and described in Garrett United States Patent No. 1,956,419.
  • the present invention has for one of its objects to provide, with a view of obtaining automatic tuning, an improved arrangement in which the position 01' the tuning means in which the motor is stopped is independent of the direction from which the desired position of the tuning means is reached.
  • the driving direction of the tuning means and the stopping of the tuning means on the desired tuning position being reached is governed similarly to that described in the above mentioned patent, that is, by the position of one or more switches which are operated, for each of the predetermined stations, by the movement of a feeler which follows the periphery of a profiled body which is driven simultaneously with the tuning means.
  • a wireless receiving set of this kind is arranged in such manner that during its movement the feeler operates two switches which, in closed position, bring about the drive of the tuning means in one or the other direction respectively and that the switch for the drive in one direction is closed before the switch for the drive in the other direction is opened,
  • a feeler l is secured to a resilient contact tongue 13 which is associated with two further contact tongues I4 and I5,
  • the contact tongue I3 is lifted to such an extent that the contact point ll secured to this tongue engages the contact tongue It.
  • the latter has thus been lifted from its neutral position in which neutral position the tongues l4 and I! are in electrical contact.
  • the switch 9 that corresponds to this station is closed by means of the station selector.
  • the motor then starts to move in a direction governed by the position or the disc 2 that corresponds to the desired station. If, as is shown in the figure, the feeler 5 engages, for example, the part 4 of the periphery of the disc 2 the shaft 1 is driven in a clockwise direction. This drive is continued until the feeler reaches the part II of the periphery of the disc 2, where the two parts of the periphery having different radii merge into each other. As soon as the feeler engages the part l2 of the periphery the contact tongue l3 starts to descend.
  • the contact tongue III has descended to such extent that the tongue l4 makes contact with the tongue l5.
  • the two coils l0 and H of the motor are energized at the same time so that the field of the motor is entirely removed and the motor stops.
  • the motor is consequently cut off in exactly the same position of the disc 2 whatever the direction from which the desired position of the tuning means may be reached.
  • two alternating current relays A and B instead of the energizing coils i0 and H of the motor are connected into the circuit by the switches I3, 14 and M, E5.
  • the relay A is connected into the circuit when the switches 8 and i3, N are closed, whereas the relay B is connected into the circuit when the switches 9 and l4, l are closed.
  • Each of the relays A and 13 includes a rest contact in and b1 respectively and a working contact (12 and be respectively.
  • the energizing coil ID of the motor is connected to the alternating current supply through the contacts a1 and b2, whereas the coil ii is connected to the supply through the contacts in and 0.2.
  • On the relay A being energized the contact 111 is opened and the contact a2 is closed so that the coil H alone is con nected into the circuit.
  • On the relay B being energized the coil I8 is connected into the circuit in a similar manner.
  • an operable shaft a reversible motor for operating the shaft, said motor being provided with a pair of windings arranged so that energization of one thereof causes the motor to operate in one direction, whereas energization of the other winding causes the motor to operate in the opposite direction
  • a relay acting upon operaton, to cause energization of one of said motor windings
  • a second relay acting upon operation to cause energization of the other of said motor windings
  • an operable main switch a muiti-positionselectively operable switching means arranged so that with the main switch closed it causes the energization of one of said relays when in one position, the energization of the other of said relays when in another position and the energization of both of said relays when in an intermediate position
  • means connected to said shaft for controlling the positioning of said selectively operable switching means in accordance with the position of the shaft, and means effective only when both of said relays are in an
  • a shaft positioning system a rotatable shaft, a reversible motor for driving said shaft, a source of energizing current for said motor, a pair of operable relay means, one of said relay means acting upon energization and only when the other of the relay means is de-energized, to connect the motor to said source and thereby effect the operation of the motor in one direction, said other relay means acting upon energization and only when the first relay means is de-energ ized, to connect the motor to said source and thereby effect the operation of the motor in the reverse direction, a multi-postion selectively operable switching means arranged so that it connects one of said relays across the source when in one position, the other of said relays across the source when in another position and both of said relays across the source when in an intermediate position, means connected to said shaft for controlling the positioning of said multiposition switching means in accordance with the position of the shaft, and means rendered operative when both of said relays are energized at the same time for connecting the motor from
  • a shaft positioning means an operable shaft, a reversible motor for operating said shaft, a source of current for said motor, a pair of circuits adapted to connect the motor to the source and arranged so that connection of the motor to the source through one of said circuits causes the motor to operate in one direction whereas connection of the motor to the source through the other of said circuits causes the motor to operate in the opposite direction.
  • each of said sets including a relay which acts upon operation to eflect the connection of the motor to the source through one oi said circuits and a relay which acts upon operation to effect the connection of the motor to the source through the other of said circuits, a plurality of main switches one for each oi said sets of relays, a plurality oi multi-position selectively operable switching means one for each gized when the switching means is in one position, the other relay of that set is energized when the switching means is in another position and both relays oi the set are energized when the switching means is in an intermediate posimeans in accordance with the position of said shaft, and operable means in said first named pair of circuits controlled by said relays for preventing the energizatlon of said motor when both relays of any of said sets of relays are in an or said sets of relays, each of said selectively 15 energized condition at the same time.
  • operable switching means being arranged so that upon closure of the main switch corresponding to any set one of the relays of the set is ener- .ALEXAN'DRE HOROWITZ. JOHANNES moms v. LAMMEREN GUNNAR. BORGE mos.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Control Of Position Or Direction (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
US246088A 1937-12-29 1938-12-16 Control circuit Expired - Lifetime US2251054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937N0041484 DE686190C (de) 1937-12-29 1937-12-29 bestimmter Stationen mittels eines Motors selbsttaetig abstimmbar ist

Publications (1)

Publication Number Publication Date
US2251054A true US2251054A (en) 1941-07-29

Family

ID=5791858

Family Applications (1)

Application Number Title Priority Date Filing Date
US246088A Expired - Lifetime US2251054A (en) 1937-12-29 1938-12-16 Control circuit

Country Status (6)

Country Link
US (1) US2251054A (enrdf_load_stackoverflow)
BE (1) BE431868A (enrdf_load_stackoverflow)
CH (1) CH206319A (enrdf_load_stackoverflow)
DE (1) DE686190C (enrdf_load_stackoverflow)
FR (1) FR848058A (enrdf_load_stackoverflow)
GB (1) GB507305A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454832A (en) * 1946-02-20 1948-11-30 Charles L Paulus Electric servo
US3493745A (en) * 1966-06-16 1970-02-03 Picker Corp Apparatus for preventing collision between two electrically conductive and relatively movable servo-controlled elements

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2720619A (en) * 1949-01-11 1955-10-11 Northrop Aircraft Inc Automatic resetting positioning control
DE1158614B (de) * 1957-05-01 1963-12-05 Gen Electric Rastschalter mit Motorantrieb

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454832A (en) * 1946-02-20 1948-11-30 Charles L Paulus Electric servo
US3493745A (en) * 1966-06-16 1970-02-03 Picker Corp Apparatus for preventing collision between two electrically conductive and relatively movable servo-controlled elements

Also Published As

Publication number Publication date
BE431868A (enrdf_load_stackoverflow) 1939-01-31
GB507305A (en) 1939-06-13
CH206319A (de) 1939-07-31
DE686190C (de) 1940-01-04
FR848058A (fr) 1939-10-23

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