US1946743A - Control apparatus - Google Patents

Control apparatus Download PDF

Info

Publication number
US1946743A
US1946743A US240861A US24086127A US1946743A US 1946743 A US1946743 A US 1946743A US 240861 A US240861 A US 240861A US 24086127 A US24086127 A US 24086127A US 1946743 A US1946743 A US 1946743A
Authority
US
United States
Prior art keywords
elements
control
circuit
solenoids
remote control
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
US240861A
Other languages
English (en)
Inventor
Jr Herman Hollerith
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
Priority to US240861A priority Critical patent/US1946743A/en
Priority to FR655625D priority patent/FR655625A/fr
Priority to GB35262/28A priority patent/GB302575A/en
Application granted granted Critical
Publication of US1946743A publication Critical patent/US1946743A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H03J1/18—Control by auxiliary power
    • H03J1/185—Control by auxiliary power the auxiliary power producing an adjustment dependent on the current intensity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat

Definitions

  • This invention relates to remote control apparatus, and particularly to a remote control apparatus which is available for use in conjunction with radio apparatus, although not limited to such use.
  • One oi the objects of the present invention is to obviate the above disadvantages and to provide a simple and efiicient system which is reliable in operation and of inexpensive construction.
  • Another object is to provide novel means for causing a distant element to follow the movements of a remote control element.
  • Another object is to provide novel means wherein the movement of a single remote control element simultaneously controls a plurality of distant elements.
  • a further object is to provide a remote control system having remote unit control means and remote individual control means.
  • a still further object is to provide a remote control system capable of independent as well as conjoint control of the controlled elements.
  • Another object is to provide a remote control for radio receivers suitable for use in present day radio sets without undue complexity arising from the need of controlling a multiplicity of elements.
  • Another object is to provide a remote control apparatus operable by alternating current such as ordinary house lighting current.
  • a plurality of solenoid coils are connected in parallel across any suitable source of alternating current, for example, ordinary house lighting current, and the center points of the coils are connected by any suitable circuit means.
  • any one of said armatures be moved relatively to its coil, a change in the flow of current through each of the other coils in the system will be produced, which will cause a movement of each remaining armature relative to its coil. If the coils and armatures and other conditions are substantially the same, the movements oi. all of the armatures will be substantially equal and corresponding, and for any given conditions, a definite relation will always exist between the positions of each armature relative to the others.
  • Variable inductances for example, inserted in the individual circuits, can be made to produce a supplemental change of the current flowing'through said circuits and thereby cause a supplemental or Vernier adjustment of the individual armatures.
  • Such a system is obviously suitable for a wide variety of purposes including any kind of distant indication or control-for example, telemetric control apparatus, distant gauge indication, control means for ordnance apparatus, and many others.
  • the invention is particularly well adapted for the distant control of radio apparatus, and the accompanying drawing shows, more or less schematically, for purposes of exemplification, the invention as applied to a typical radio receiving circuit. It will be expressly understood, however, that the invention is not limited to this embodiment or application thereof, reference being had to the appended claims for a definition of the limits of the invention.
  • FIG. 1 there is shown diagrammatically a typical radio receiving circuit comprising two stages of radio amplification and a detector.
  • the receiver is provided with the usual antenna to ground circuit 1, having coupled thereto an oscillating circuit comprising an inductance 2 and variable condenser 3, said oscillating circuit being connected across the grid and filament of a vacuum tube 4.
  • the plate circuit of the tube 4 is coupled by the transformer 5 with an oscillating circuit comprising the secondary of said transformer and a variable condenser 6.
  • Said oscillating circuit is connected to the grid and filament of tube 7, the plate circuit of which is coupled by a transformer 8 with an oscillating circuit comprising the secondary of said transformer and a variable condenser 9.
  • Said oscillating circuit is connected to the grid and filament of a detector tube 10, which is shown as having a feedback coil 11, and. output transformer 12.
  • said elements are connected by a remote control system, such as hereinbefore described, with a suitable remote control and indicating means.
  • said system comprises the solenoids 13, 14 and 15, which are connected by any suitable means with the said variable condensers, and the solenoid 16 which is similarly connected with the remote control element.
  • Said solenoids are preferably connected in parallel across any suitable source of alternating current, which may be supplied, for example, by a connector plug 12, adapted to be connected to a house lighting circult.
  • each solenoid coil is connected to one side 18 of the circuit and the other ends of said coils are connected by individual wires 19, 20, 21 and 22 with a common point 23 in the other side of the circuit.
  • the center points of each coil are connected together by any suitable means such as the circuit 24.
  • each of the condensers and the control element is of a rotary type
  • the solenoid armatures are connected to said rotary elements by means of rack bars 25, gearing with pinions 26 mounted on the respective shafts of said rotary elements.
  • the solenoids 13, 14 and 15 are preferably provided with any suitable means for normally maintaining the armatures thereof in their initial positions, such as the springs 27 interposed between pins 28 on the rack bars 25 and pins 29 on the condenser supports. Any suitable means may be employed for the purpose of maintaining the control element in any desired position, such as suitable frictional or locking means.
  • any suitable independently variable means may be included in certain or all of the parallel solenoid circuits for changing the electrical characteristics thereof.
  • the condensers 3 and 5 are made independently variable by means of any suitable variable incluctances 32 and 33, preferably connected re spectively in the wires 19 and 20.
  • Said variable inductances are preferably combined with the control element 30 and its solenoid 16 at the remote control station, and said elements may be, if desired, combined and mounted in a suitable control box indicated diagrammatically at 3
  • the system above described provides a remote control apparatus which is very simple and inexpensive and yet reliable and efficient in operation.
  • the system is capable of expansion to any desired number of elements, merely by the connection of additional solenoids in parallel across the circuit.
  • the individual elements of the system are few and are of standard character, and therefore readily attainable and of comparatively small cost.
  • the apparatus at the remote control station and the apparatus connected with the elements to be controlled are entirely separate except for the provision of connecting wires, which are few in number and may be readily combined in. a single flexible cable. It will likewise be observed that this system provides a remote unit control apparatus, whereby a plurality of elements may be simultaneously controlled from a single remote element, combined with a remote individual control apparatus whereby the said distant elements may be controlled individually from the remote control station, said remote individual control being independent of the unit control or supplemental thereto.
  • each circuit including a coil having a movable magnetic core, a circuit connecting the center points of said coils, means for moving one of said cores to cause related movements of the remaining cores, and independently variable current controlling means in certain of said circuits.
  • a control element a plurality of members to be controlled thereby, a plurality of solenoid coils having similar electrical characteristics and connected in parallel circuits across a source of alternating current, a circuit connecting the center points of said coils, a movable core for each coil, means operatively connecting said control element and said members each with one of said cores, and means for independently varying the electrical characteristics of certain of said parallel circuits.
  • a control element In apparatus of the class described, the combination of a control element, a plurality of members to be controlled thereby, a plurality of solenoid coils having similar electrical characteristics and connected in parallel circuits across a source of alternating current, a circuit connecting the center points of said coils, a movable core for each coil, means operatively connecting said control element and said members each with one of said cores, and variable inductance means in certain of said parallel circuits.
  • radio apparatus the combination of a plurality of tuning elements, a control member therefor, a plurality of solenoids connected in parallel across a source of alternating current, a circuit connecting the center points of said solenoids, a movable core for each solenoid, and means operatively connecting each of said tuning elements and said control member to one of said movable cores, and independently variable current controlling means in certain of said parallel circuits.
  • radio apparatus the combination of a plurality of tuning elements, a control member, a plurality of solenoids connected in parallel circuits across a source of alternating current, a circuit connecting the center points of said solenoids, a movable core for each solenoid, a rack operatively connected to each core, a gear for each tuning element and for said control member, said gears engaging said racks, and variable inductance elements in certain of said circuits.
  • radio apparatus the combination of a plurality of tuning capacities, a control member therefor, a plurality of solenoids connected in parallel circuits across a source of alternating current, a circuit connecting the center points of said solenoids, a movable core for each solenoid, resilient means tending to maintain said cores in normal position, a rack operatively connected to each core, a pinion for each capacity and for said control member, said pinions engaging said racks, and independently variable inductance elements in certain of said circuits.
  • Remote control radio apparatus comprising in combination a plurality of movable tuning elements, a single remote indicating and controlling member, electrical transmission means associated with said member and with said tuning elements to cause each of said tuning elements to follow the movements of said indicating member, said transmission means including a main alternating current circuit controlled by said member and branch circuits connected therewith for supplying controlling current for said elements, and supplemental remote control means in said branch circuits for individually adjusting said tuning elements independently of said member.
  • Remote control radio apparatus comprising in combination a plurality of movable tuning elements, remote control means, including a single movable, electrical control element having an indicator, a balanced electrical transmission means connecting said elements and indicator whereby movement of said indicator causes substantially equal movements of each tuning element, said remote control means including separate independently adjustable circuit impedance elements arranged to move certain of said tuning elements individually.
  • radio apparatus the combination of a plurality of tuning elements, an individual electrical actuator for each of said elements, an alternating current electrical control circuit therefor including variable impedance, means for operating certain of said actuators individually from a remote point, separate and independently variable electrical impedance means in said circuit at said remote control point for operating all of said elements conjointly, and a single indicating control member for said last named means.
  • a radio remote control system the combination with a plurality of individual movable control elements adjustable each through substantially the same predetermined control range of operation, of a remotely located movable indicating control member therefor, a balanced solenoid alternating current control system arranged to interconnect said movable control elements and said last named control member, said system including individual control circuits in terposed between said control member and cer tain of said control elements, and individually adjustable circuit impedance means located in certain of said individual circuits adjacent to said remote control member.
  • a radio remote control system the combination of a plurality of solenoids connected in parallel circuits across a source of alternating current, a movable core member for each of said solenoids, and means independent of said solenoids, for varying the circuit impedance of certain of said parallel circuits.
  • a radio remote control system the com bination of a plurality of solenoids connected in parallel circuits across a source of alternating current, a movable core member for each of said solenoids, a common circuit lead connected with a tap point between the terminal ends of each solenoid, and means independent of said solenoids, for varying the circuit impedance of certain of said parallel circuits.
  • Remote control radio apparatus comprising in combination, a plurality of movable tuning elements, a movable remote control member, electrical transmission means associated with said member and With said tuning elements and being electrically interconnected to cause each of said tuning elements to follow the movements of said control member, said transmission means including a main alternating current circuit controlled by said member and branch circuits connected therewith for supplying controlling current for said elements, and supplemental remote control means in said branch circuits for individually adiusting said tuning elements independently of said member.
  • radio apparatus the combination of a plurality of tuning elements, an individual electrical actuator for each of said elements, an alternating current electrical control circuit therefor including variable impedance means for operating certain of said actuators individually from a remote point, and separate and independently variable electrical impedance means in said circuit at said remote control point for operating all of said elements conjointly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Selective Calling Equipment (AREA)
US240861A 1927-12-17 1927-12-17 Control apparatus Expired - Lifetime US1946743A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US240861A US1946743A (en) 1927-12-17 1927-12-17 Control apparatus
FR655625D FR655625A (fr) 1927-12-17 1928-06-11 Procédé de séchage des herbes aquatiques
GB35262/28A GB302575A (en) 1927-12-17 1928-11-29 Control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US240861A US1946743A (en) 1927-12-17 1927-12-17 Control apparatus

Publications (1)

Publication Number Publication Date
US1946743A true US1946743A (en) 1934-02-13

Family

ID=22908238

Family Applications (1)

Application Number Title Priority Date Filing Date
US240861A Expired - Lifetime US1946743A (en) 1927-12-17 1927-12-17 Control apparatus

Country Status (3)

Country Link
US (1) US1946743A (fr)
FR (1) FR655625A (fr)
GB (1) GB302575A (fr)

Also Published As

Publication number Publication date
FR655625A (fr) 1929-04-23
GB302575A (en) 1929-10-17

Similar Documents

Publication Publication Date Title
US2568587A (en) Differential transformer
US1946743A (en) Control apparatus
US2498078A (en) Common control for electrical tuners and couplers
US2313950A (en) Potential device
US1123067A (en) Means for adjusting from a distance any desired objects.
US2390463A (en) Electrical control system
US2750545A (en) Electro-mechanical computing circuits
US2737629A (en) Equalizer arrangement with an attenuation characteristic proportional to frequency
US2474527A (en) Remote-control system
US2390768A (en) Variable selectivity amplifier
US2343945A (en) Follow-up system
US2474663A (en) Remote-control system for selectively controlling a plurality of adjustable elements
US2168326A (en) Automatic tuning system and apparatus
USRE16651E (en) clark
US2856780A (en) Decade type tuning mechanism
US2207254A (en) Band spread tuning system
US2150362A (en) Control circuit for signal transmitting and receiving apparatus
US1742147A (en) Distant control for radio apparatus
US1890034A (en) Electrical coupling system
US2478120A (en) Electrical variable capacitance device with auxiliary
US1509248A (en) Self-setting transmission system
US1582555A (en) Device for controlling and indicating the tuning of radio instruments and the like
US1918238A (en) Radio receiving system
US1372653A (en) Electrical transformer system
US1014002A (en) Apparatus for wireless signaling.