US2903663A - Stick actuated inductive controller element - Google Patents

Stick actuated inductive controller element Download PDF

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US2903663A
US2903663A US580557A US58055756A US2903663A US 2903663 A US2903663 A US 2903663A US 580557 A US580557 A US 580557A US 58055756 A US58055756 A US 58055756A US 2903663 A US2903663 A US 2903663A
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armature
pole pieces
pair
core
control
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Collina Giustino
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Contraves Italiana SpA
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Contraves Italiana SpA
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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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/12—Insoluble sulfur (mu-sulfur)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/225—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils
    • G01D5/2258—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the mutual induction between the two coils by a movable ferromagnetic element, e.g. core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Definitions

  • STICK ACTUATED INDUCTIVE CONTROLLER ELEMENT Filed April 25, 1956 5 Sheets-Sheet 5 United States Patent 3 STICK ACTUATED INDUCTIVE CONTROLLER ELEMENT Giustino Coilina, Rome, Italy, assignor to Contraves Italiana, S.p.A., Rome, Italy, an Italian company Application April 25, 1956, Serial No. 580,557
  • This invention relates to an inductive control device to be used as a transmitter in a follow-up system, of the type wherein the displacements of a controlling member such as a hand-lever with respect to a reference position give rise to an induced variable control current to be transmitted to a receiver operatively connected with a controlled member.
  • a magnetic core having an E-shaped cross-section carries on its mid-leg a primary winding fed with a reference alternating current and, on its outer legs two secondary windings connected in opposition with each other.
  • the device is completed by an armature having the same length as the magnetic core and integral with the control lever, which is displaced in parallel relationship with said core.
  • the sensitivity is practically constant.
  • the output voltage is substantially a linear function of the displacements of the control lever. This has many drawbacks in various applications.
  • the device when progressive followup systems are actuated by means of a hand control of this type, it is often difiicult to obtain accurately adjusted small variations of the controlled member position.
  • the device when used for controlling the rotational speed of an aided aiming system, e.g. in anti-aircraft artillery, the said device must be capable of controlling both a high rotational speed and an extremely slovv one, this last condition being indispensable when the aircraft flies substantially in radial direction with respect to the gun or when it is comparatively distant.
  • the invention has for its purpose to improve inductive control devices of the type described in view of widening theirscope of application, by giving them a variable sensitivity, very small when the control member remains in the vicinity of zero position, but rapidly increasing as the control member is shifted farther.
  • This permits disposing, on the one hand, of a large amplitude of the control current for important displacements of the control lever and, on the other hand, for the small displacements of the same, of an extremely smooth control which improves the steadiness of the whole assembly while permitting highly accurate adjustment of the controlled member.
  • the cooperating surfaces of the armature and magnetic core are cylindrical and have for their common axis that around which the armature is pivoted.
  • the main object of the invention is to provide the desired variable sensitivity of the control device by giving to the cylindrical surface of the armature a length greater than that of the coaxial cylindrical surface of the E- shaped core so that, in its neutral position, the armature projects on either side of the outer legs of the said core.
  • Another object of the invention is to further improve the shape of the said curve by giving to the edges of the armature a comparatively important thickness.
  • the invention has also for its purpose to provide an inductive control device as described above, further adapted to be automatically returned into zero position while offering sufficient mechanical and electrical steadiness at said zero position, which permits taking full advantage of the reduced sensitivity of the device in the vicinity of the said position.
  • Still another object of the invention is therefore to provide the control device with an elastic returning system continuously urging the hand-lever towards its neutral position.
  • the said returning system comprises two U-shaped members symmetrically disposed at rest on either side of a mid-reference plane containing the pivoting axis of the control lever and pivoted at the end of one of their arms around the said axis and a spring urging said members-towards each other while pressing'their'free armagainst a fixed abutment located on said line and corresponding to the zero position of the lever.
  • the latter further carries an abutment of same diameter as the fixed abutment and clamped in neutral po sitionbetween the free arms of the U-shaped members.
  • the pivot of the control lever is secured on the frame of the apparatus on which the E-shaped core is also mounted through a system of adjusting screws adapted to vary the width of the gap either as a whole to adjust the sensitivity curve or differentially on either side of the core to adjust the symmetry and to eliminate, in Zero position, that component of the residual voltage which is in-phase with the primary voltage.
  • Still another object of the invention is to superpose on the output current a weak additional current drawn off of an adjustable potential divider connected across a condenser fed in series with a resistor from the secondary winding of a transformer, of which the primary winding is fed with the reference voltage.
  • Still a further object of the invention is to incorporate in the feeding circuit of the primary coil of the control device a phase-shifting network to balance out the phaseshift of the output current with respect to the reference voltage.
  • the invention also permits controlling two separate follow-up systems by means of one single control device of the type described.
  • a control lever mounted on a swivel-joint or joy-stick is used for controlling simultaneously two diiferent effects such as corrections in azimuth and elevation in anti-aircraft artillery, or the like.
  • this double control is obtained by two output currents, the sensitivity of the system being for both controls reduced in the vicinity of the zero position while it increases progressively as the control lever is shifted beyond a given limit.
  • an inductive control device of the type described including a fixed magnetic core having the shape of a cross and having five legs, one of which, disposed at the center of the cross, carries the primary winding fed with the reference current while the four other ones, opposed pairwise carry secondary windings also connected in opposition pairwise.
  • the active surfaces of the armature and core are spherical and concentric and the armature is integral with a joystick mounted on a swivel-joint having for its center the common center of said surfaces, so that the gap has a constant value for all relative positions of the armature and core.
  • the double control system is provided with the same improvements as the simple one, viz. projecting armature, thick edges, adjustable gap, compensating circuit for the component in quadrature of the residual voltage, phase-shifting circuit, mechanical return system, etc.
  • Still another object of the invention is to provide a spherical armature as described above, of which the inner face is limited along its active edges by four planes parallel to the above mentioned right-angled planes so as to avoid any interference between the two output circuits.
  • the sensitivity curves corresponding to the two right-angled planes of displacement of the lever may be diiferent. This feature may be obtained by giving to the outer core legs of one pair a greater cross-section than to those of the other pair, or by giving to the coils of one pair a greater number of turns than to those of the other pair. Alternatively, the same differential effect may be obtained by giving the armature an assymmetric shape, its projecting portion being greater in one direction than in the other. In another alternative, the pole pieces of one pair may be different in shape or size from those of the other pair.
  • Fig. 1 is a partly sectional view in a plane at right angles to the pivoting axis of the control lever.
  • Fig. 2 is a horizontal sectional view along line 2-2 of Fig. 1.
  • Fig. 3 is a view similar to Fig. 1, in a plane at right angles thereto. 7
  • Fig. 4 is an elevational view from the right of the device of Fig. 1.
  • Fig. 5 is a view similar to Fig. 4, but showing the control lever shifted towards the right.
  • Figs. 6 and 7 are diagrammatical views illustrating the operation of the control device.
  • Figs. 8 and 9 are curves of the output current vs. the displacements of the control lever, in Fig. 8 for a known device and in Fig. 9 for a device according to the invention, and
  • Fig. 10 is a wiring diagram including various correct ing networks for eliminating the residual currents.
  • a fixed magnetic circuit 11 constituted by a laminated core is provided with five legs or pole pieces each carrying a coil.
  • the legs or pole pieces 13 are symmetric with respect to the mid-leg 12. The same is true for the legs or pole pieces 14, but in a plane at right-angles to that of the legs 13.
  • the four outer legs are disposed at the ends of a cross having equal arms.
  • the pole pieces of the legs are limited by a spherical surface the center of which coincides with the center 15 of a swivel joint having one axis in the symmetry plane of the legs 13 and its other axis in the symmetry plane of the legs 14'; both said axes are supported in bearings integral with the frame containing the apparatus and the swivel joint carries the control lever 19.
  • the latter projects out of the frame through a gate 16 tightly closed by a flexible pleated diaphragm 17 the outer edge of which is secured on the frame while its center is attached at 18 to the control lever 19.
  • the lever 19 carries at its inner end a ferromagnetic armature it having a square shape when viewed in plan and its inner face that is, the one adjacent the legs of 13 and 14 is constituted by a spherical surface having its center coinciding with that of the swivel joint.
  • the armature may be made of iron, if the apparatus is fed with an alternating current at industrial frequency but with more elevated frequency, it is preferred to make the armature of ferrite or a similar material so as to avoid magnetic losses.
  • the armature 20 moves in front of the pole pieces of the core without any variation of the width of the gap. It is obvious that this assembly may be designed with a very high accuracy, and that means such as those described hereunder may be provided to eliminate any variation of the gap between two positions of the hand lever.
  • the central coil or primary winding 21 is fed with the reference alternating voltage.
  • the two coils 22-22 carried by the pole pieces 13-13 are connected in opposition. The same is true for the coils 23-23 mounted on the pole pieces 114-14.
  • the coils 22-22 and 23-23 undergo induced electromagnetic forces and when the armature is in neutral (or zero) position (as shown in Figs. 1 and 3), the fluxes passing through the coils of one pair are equal to one another since the reluctances of both magnetic circuits are also equal.
  • 5(a) is the output voltage and oz the angle of rotation of the control lever.
  • the lever is further displaced in the direction of the arrow, when the point A, after having overreached the point B, comes nearer the point C (see also Fig. 7), there is suddenly introduced a variation of the gap between the leg BC and the armature, so that the reluctance of the circuit 1 rapidly increases and, therewith, the output voltage.
  • the sensitivity is extremely weak in the vicinity of the zero, while it rapidly increases for greater displacements of the lever.
  • the calculations show that the sensitivity may be influenced by adjusting the ratio of the length of the projecting edge of the armature to the width of the gap.
  • Figs. 8 and 9 show curves of the output current vs. the angular displacements of the control lever.
  • Fig. 8 corresponds to a known device, wherein the length of the armaturev is equal to the distance B-B between the outer edges of the pole pieces. In such a known device, since the sensitivity is practically constant, it is too great in the vicinity of zero, where comparatively important currents are obtained in response to comparatively small displacements. As a result, it is practically impossible to obtain a fine adjustment of the controlled member.
  • Fig. 9 corresponds to an angle of projection of the armature on either side of the core by about 3 to 4 of rotation, while the total angular stroke of the lever corresponding to the thickness of the leg is about 15.
  • control device is similar when the armature is rotated around its other axis so that finally two separate motions may be controlled with the joy-stick.
  • a particularly interesting application of the control device according to the invention is to be found in the field of anti-aircraft defense systems with automatic aided aiming.
  • the operator introduces into a suitable computer initial data such as the rotational speed in azimuth and elevation, whereupon the guns, as well as the optical equipments, are rotated at said speed.
  • initial data such as the rotational speed in azimuth and elevation
  • the guns as well as the optical equipments
  • Fig. 3 shows similar rods 26a and 27a, a spring 28a and stirrup, 25a corresponding to the parts 26, 27, 28 and 25 and ensuring the return action in the other plane of rotation of the control lever.
  • the horizontal cross-section of the armature preferably has a square shape since, if, for example, the cross-section of the armature were rounded, a considerable displacement of the lever around one of the axes of the swivel joint would change the projecting configuration of the edges, which would perturbate the curve output voltage/angular displacement.
  • the sensitivity curve corresponding to the angular displacement in one plane is not affected by the motions in the other plane. Now, this requires a uniform thickness of the edges of the armature.
  • the design of the five-leg stationary core is indicated in Figs. 1 and 3 as shown in Fig. 3, the legs 12, 1414 are constituted by fiat laminations stacked in the shape of an E' provided in its base with a mid-notch 29. As shown in Fig. l, the legs 13--13 are constituted by a stack oflaminated sheets having the general shape of a U and provided, on the upper face of the base of the U, with a notch 30. Owing to the notches 29 and 30, the U-shaped laminations may be assembled at right angles to the E-shaped ones in a five-leg core assembly.
  • the device further comprises means to adjust the position of the core in order to vary the gap to thereby obtain. an electrical symmetry. It also comprises means to reset the output voltage into phase with the reference voltage as well as means to balance out the component of the residual voltage in quadrature with the reference voltage.
  • the fixed core is mounted on a platen 31 secured in turn on a ball-and-socket joint 32.
  • Two micrometer screws 33-33 disposed under the pole pieces 13-13 are used for adjusting the gap between the said pole pieces and the armature 20.
  • two further micrometer screws acting under the pole pieces 14-14 are used for adjusting. the gap between the latter and the armature 20.
  • the gap existing above one pair of pole pieces is first adjusted, whereupon the gap above the 7 other pair is adjusted in turn. Usually, a perfect adjustment will be obtained by successive approximations. Once the micrometer screws have been adjusted, they may be locked in position by means of counternuts 35 35 and 36-36.
  • the output voltage across the terminals of the coils is not in-phase (nor in phase opposition) with the reference voltage, due to the magnetic losses through iron. This is the reason why, according to the invention, the feeding voltage of the central coil is previously phase-shifted by a suitable angle, so as to make the output voltage continuously in phase or in phase opposition with the reference voltage.
  • This result is obtained by means of a condenser C connected in series and a resistor R connected in parallel with the terminals of the coil 21 fed with the reference voltage V as shown in Fig. 10. Since usually the output voltage is not nil when the lever is at zero position so that a residual voltage is generated, suitable means must be provided to balance out the said residual voltage.
  • the latter has two main components, viz. a component in phase with the reference voltage V and a component in quadrature therewith.
  • the first one of these components may be eliminated mechanically by suitably adjusting the gap by means of the micrometric screws described above.
  • the second one it is eliminated, according to the invention, by feeding the secondary windings with a matching voltage of some amplitude and opposed phase.
  • This matching voltage is obtained by means of a circuit comprising a transformer T, the primary winding of which receives the reference Voltage V, while its secondarywinding is provided with a grounded mid-tap which is connected to a resistor R and a condenser C It is then possible to draw off across the condenser C a voltage in quadrature with the reference voltage V.
  • P- tentiometers P and P are connected across C and act as a potential divider for generating a voltage of variable amplitude phase-shifted by 90 and lagging or advancing with respect to the reference voltage. This phase-shifted voltage is sent to the coil pairs 2222 and 23-23 in order to balance out the component in quadrature.
  • the armature has a square cross-section while the legs of the core as well as the pole pieces l313 and 1414 are similar and While the coils 22-22 and 23-23 have the same number of turns.
  • the law of variation of the controlling eifect will be the same for both right-angled planes of displacement of the lever.
  • the same output voltage will be obtained for a given displacement of the lever. e.g. along the direction l313 and for the same displacement along the direction l e-14.
  • the two right-angled motions of the lever are used for controlling different follow-up systems requiring different sensitivities in the vicinity of zero as well as different output voltages.
  • This may be easily obtained in several ways: for example, two different sensitivities in the vicinity of zero may be pro ided by giving to the projecting portion a longer length in one direction than in the other one or, in other words, by giving to the armature a rectangular crosssection instead of a square one.
  • two output currents of different amplitudes may be obtained, e.g. by giving to the pole pieces of one pair, e.g. 13-13 a shape or a thickness differing from those of the other pole piece pair. It is also possible to provide, for one pair of coils, such as 2222, a greater number of turns than for the other pair.
  • the invention may be used also for one single control.
  • the armature will be limited on its lower face by a cylindrical surface coaxial with the upper surface of the three legs of the E-shaped stationary core. The functions of the projecting edges of the armature, the adjustable gap and the balancing circuits would remain the same.
  • An inductive control device comprising, in combination, a fixed magnetic core having a central pole piece and at least one pair of outer pole pieces symmetrically disposed on either side of said central pole piece and aligned therewith, a movable control member, an armature movable with said control member in parallel relationship with said core along the direction of alignment of said pole pieces from an at rest position aligned with the axis of said central pole piece, a primary winding on said central pole piece, two secondary windings connected in series and wound in opposition, one on each of said pair of pole pieces, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to said secondary windings, said armature having a length in the direction of alignment of said pole pieces greater than the distance between the outer faces of the outer pole pieces so that the armature in the at rest position projects beyond said core on opposite sides thereof, whereby as said armature is displaced to one side of said at rest position, there is fed from said secondary windings a control current increasing slowly in output
  • An inductive control device adapted for simultaneously controlling two output control currents comprising, in combination, a fixed magnetic core having a central pole piece and four outer pole pieces symmetrically disposed pairwise on either side of said central pole piece and aligned therewith, a control member, an armature integral with said control member, a swivel-joint to pivot said control member and armature around a point located on the axis of said central pole piece, the faces of said pole pieces extending in a common spherical surface and the active face of said armature being also spherical and concentric with said common spherical surface at said point, a primary winding on said central pole piece, a first pair of secondary windings connected in series and wound in opposition, one on each of the outer pole pieces of one pair, a second pair of secondary windings connected in series and wound in opposition, one on each of the pole pieces of the other pair, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to the
  • inductive control device comprising, in combination, a fixed magnetic core having a central pole piece and at least one pair of outer pole pieces symmetrically disposed on either side of said central pole piece and aligned therewith, a movable control member, an annaturemovable with said control member in parallel relationship with said core along the direction of alignment of said pole pieces from an at rest position aligned with the axis of said central pole piece, a primary winding on said central pole piece, two secondary windings, connected in series and wound in opposition, one on each of said pair of pole pieces, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to said secondary windings, saidannature having a length in the direction of alignment of said pole pieces greater than the distance'between the outer faces of the outer pole pieces so that the armature in the at rest position projects beyond said core on opposite sides thereof, whereby said armature is displaced to one side of said at rest position, there is fed from said secondary windings a control current increasing slowly in. output voltage as
  • An inductive control device comprising, in combination, a fixed magnetic core having a central pole piece and at least one pair of outer pole pieces symmetrically disposed on either, side. of said central pole piece and aligned therewith, a movable control member, an armature movable with said control member in parallel relationship with said core along the direction of alignment of said pole pieces from an at rest position aligned with the axis of said centralpole piece, a primary winding on said central pole piece, two secondary windings connected in series and wound in opposition, one on each of; said'pair of pole, pieces, analternating current source, means.
  • phase-shifting means are constituted by a network including a condenser interposed between said alternating current source and said primary winding and a resistor connected with said condenser.
  • An inductive control device comprising, in combination, a fixed magnetic core having a central pole piece and at least one pair of outer pole pieces symmetrically disposed on either side of said central pole piece and aligned therewith, a movable control member, an armature movable with said control member in parallel relationship with said core along the direction of alignment of said pole pieces from an at rest position aligned with the axis of said central pole piece, two secondary windings conected in series and wound in opposition, one on each of said pair of pole pieces, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to said secondary windings, said armature having a length in the direction of alignment of said pole pieces greater than the distance between the outer faces of the outer pole pieces so that the armature in the at rest position projects beyond said core on opposite sides thereof, whereby as said armature is displaced to one side of said at rest position, there is fed from said secondary windings a control current increasing slowly in output voltage as long as said armature still projects
  • An inductive control device adapted for simultaneously controlling two output control currents comprising, in combination, a fixed magnetic core having a central pole piece and four outer pole pieces symmetrically disposed pairwise on either side of said central pole piece and aligned therewith, a control member, an armature integral with said control member, a swivel-joint to pivot said control member and armature around a joint located on the axis of said central pole piece, the faces of said pole pieces extending in a common spherical surface and the active face of said armature being also spherical and concentric with said common spherical surface at said point, a primary winding on said central pole piece, a first pair of secondary windings connected in series and wound in opposition, one on each of the outer pole pieces of one pair, a second pair of secondary windings connected in series and wound in opposition, one on each of the pole pieces of the other pair, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to the
  • An inductive control device adapted for simultaneously controlling two output control currents comprising, in combination, a fixed magnetic core having a central pole piece and four outer pole pieces symmetrically disposed pairwise on either side of said central pole piece and aligned therewith, a control member, an armature integral with said control member, a swivel-joint to pivot said control member and armature around a point located on the axis of said central pole piece, the faces of said pole pieces extending in a common spherical surface and the active face of said armature being also spherical and concentric with said common spherical surface at said point, a primary winding on said central pole piece, a first pair of secondary windings connected in series and wound in opposition, one on each of the outer pole pieces of one pair, a second pair of seocndary windings connected in series and wound in oposition, one on each of the pole pieces of the other pair, an alternating current source, means to feed said primary winding with current from said source,
  • An inductive control device adapted for simultaneously controlling two output control currents comprising, in combination, a fixed magnetic core having a central pole piece and four outer pole pieces symmetrically disposed pairwise on either side of said central pole piece and aligned therewith, a control member, an armature integral with said control member, a swivel-joint to pivot said control member and armature around a point lo cated on the axis of said central pole piece, the faces of said pole pieces extending in a common spherical surface and the active face of said armature being also spherical and concentric with said common spherical surface at said point, a primary winding on said central pole piece, a first pair of secondary windings connected in series and wound in opposition, one on each of the outer pole pieces of one pair, a second pair of secondary windings connected in series and wound in opposition, one on each of the pole pieces of the other pair, an alternating current source, means to feed said primary winding with current' from said source, output terminals
  • An inductive control device comprising, in combination, a fixed magnetic core having a central pole piece and at least one pair of outer pole pieces symmetrically disposed on either side of said central pole piece and aligned therewith, a movable control member, an armature movable with said control member in parallel relationship with said core along the direction of alignment of said pole pieces from an at rest position aligned with the axis of said central pole piece, a primary winding on said central pole piece, two secondary windings connectcd in series and wound in opposition, one on each of said pair of pole pieces, an alternating current source, means to feed said primary winding with current from said source, output terminals connected to said secondary windings, said armature having a length in the direction of alignment of said pole pieces greater than the distance between the outer faces of the outer pole pieces so that the armature in the at rest position projects beyond said core on opposite sides thereof, whereby as said armature is displaced to one side of said at rest position, there is fed from said secondary windings a control current increasing slowly

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US580557A 1955-05-03 1956-04-25 Stick actuated inductive controller element Expired - Lifetime US2903663A (en)

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US (1) US2903663A (enrdf_load_stackoverflow)
BE (1) BE547348A (enrdf_load_stackoverflow)
CH (1) CH335120A (enrdf_load_stackoverflow)
DE (1) DE1102245B (enrdf_load_stackoverflow)
FR (1) FR1153152A (enrdf_load_stackoverflow)
GB (1) GB830407A (enrdf_load_stackoverflow)
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162399A (en) * 1959-07-28 1964-12-22 Short Brothers & Harland Ltd Control means for guided missiles, aerodynes and the like
US3270260A (en) * 1963-11-18 1966-08-30 Measurement Systems Inc Stick-operated diaphragm control
US3277719A (en) * 1963-10-14 1966-10-11 Motorola Inc Differential pressure transducer
US3716719A (en) * 1971-06-07 1973-02-13 Aerco Corp Modulated output transformers
DE2942003A1 (de) * 1979-10-17 1981-04-30 Danfoss A/S, 6430 Nordborg Elektrische steuervorrichtung mit einem steuerhebel
US4306208A (en) * 1978-05-30 1981-12-15 Ledex, Inc. Joy-stick controller
EP0041281A3 (en) * 1980-05-12 1981-12-16 Inductive Control Systems B.V. Contactless electric control-handle
US4462015A (en) * 1982-02-04 1984-07-24 Yishay Netzer Electromagnetic pick-off control handle
US4507601A (en) * 1983-02-25 1985-03-26 Andresen Herman J Lever stroke control
US5109193A (en) * 1990-06-07 1992-04-28 F.M.E. Corporation Inductive digital encoder array
US5809841A (en) * 1996-10-17 1998-09-22 Caterpillar Inc. Variable position detent mechanism for a control lever
US5979268A (en) * 1998-01-16 1999-11-09 Caterpillar Inc. Variable position detent mechanism for a control lever
US6405432B1 (en) * 1998-11-06 2002-06-18 Midway Games Inc. Potentiometer mounting clip for a joystick controller
WO2011124596A1 (de) 2010-04-08 2011-10-13 Palfinger Ag Kontaktloses elektrisches steuergerät

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DE1133012B (de) * 1958-05-28 1962-07-12 Perkin Elmer Corp Elektrische Zwangssteuerung eines belibigen Teiles aus der Ferne mit Hilfe eines in mehreren Koordinaten bewegten, handbetaetigten Steuerknueppels
DE1154853B (de) * 1961-06-27 1963-09-26 Continental Elektro Ind Ag Einrichtung zur elektrischen Steuerung eines einem bewegten Objekt nachzufuehrenden Richtmittels
DE1261581B (de) * 1963-06-11 1968-02-22 Bodenseewerk Perkin Elmer Co Steuerknueppelanordnung, insbesondere fuer Flugzeugsteuerungen, bei welcher die Lage des Steuerknueppels elektromagnetisch abgetastet wird
DE1211314B (de) * 1964-04-08 1966-02-24 Otto Straub Proportionalgeber zur Steuerung von Flugzeugen u. dgl.
FR2256521B1 (enrdf_load_stackoverflow) * 1973-12-26 1976-10-08 Telemecanique Electrique
JPS54156963A (en) * 1978-05-30 1979-12-11 Ledex Inc Manual operating device
NL8401391A (nl) * 1984-05-02 1985-12-02 Inductive Control Syst Kontaktloze elektrische besturingsinrichting.

Citations (4)

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US1988458A (en) * 1930-12-27 1935-01-22 Minorsky Nicolai Electrical controlling system
US2462081A (en) * 1947-08-22 1949-02-22 Sperry Corp Servomotor system
US2516912A (en) * 1948-05-18 1950-08-01 Kearfott Company Inc Gyro erecting system
US2592417A (en) * 1945-10-08 1952-04-08 Fairchild Camera Instr Co Gyrostabilizing system

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DE908921C (de) * 1942-07-21 1954-04-12 Askania Werke Ag Durch eine mechanische Groesse gesteuerte magnetische Bruecke

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Publication number Priority date Publication date Assignee Title
US1988458A (en) * 1930-12-27 1935-01-22 Minorsky Nicolai Electrical controlling system
US2592417A (en) * 1945-10-08 1952-04-08 Fairchild Camera Instr Co Gyrostabilizing system
US2462081A (en) * 1947-08-22 1949-02-22 Sperry Corp Servomotor system
US2516912A (en) * 1948-05-18 1950-08-01 Kearfott Company Inc Gyro erecting system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162399A (en) * 1959-07-28 1964-12-22 Short Brothers & Harland Ltd Control means for guided missiles, aerodynes and the like
US3277719A (en) * 1963-10-14 1966-10-11 Motorola Inc Differential pressure transducer
US3270260A (en) * 1963-11-18 1966-08-30 Measurement Systems Inc Stick-operated diaphragm control
US3716719A (en) * 1971-06-07 1973-02-13 Aerco Corp Modulated output transformers
US4306208A (en) * 1978-05-30 1981-12-15 Ledex, Inc. Joy-stick controller
DE2942003A1 (de) * 1979-10-17 1981-04-30 Danfoss A/S, 6430 Nordborg Elektrische steuervorrichtung mit einem steuerhebel
EP0041281A3 (en) * 1980-05-12 1981-12-16 Inductive Control Systems B.V. Contactless electric control-handle
US4434412A (en) 1980-05-12 1984-02-28 Inductive Control Systems B.V. Contactless, electric control-handle
US4462015A (en) * 1982-02-04 1984-07-24 Yishay Netzer Electromagnetic pick-off control handle
US4507601A (en) * 1983-02-25 1985-03-26 Andresen Herman J Lever stroke control
US5109193A (en) * 1990-06-07 1992-04-28 F.M.E. Corporation Inductive digital encoder array
US5809841A (en) * 1996-10-17 1998-09-22 Caterpillar Inc. Variable position detent mechanism for a control lever
US5979268A (en) * 1998-01-16 1999-11-09 Caterpillar Inc. Variable position detent mechanism for a control lever
US6405432B1 (en) * 1998-11-06 2002-06-18 Midway Games Inc. Potentiometer mounting clip for a joystick controller
WO2011124596A1 (de) 2010-04-08 2011-10-13 Palfinger Ag Kontaktloses elektrisches steuergerät

Also Published As

Publication number Publication date
GB830407A (en) 1960-03-16
NL97623C (enrdf_load_stackoverflow)
CH335120A (fr) 1958-12-31
FR1153152A (fr) 1958-03-03
NL97629C (enrdf_load_stackoverflow)
DE1102245B (de) 1961-03-16
BE547348A (enrdf_load_stackoverflow)

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