US3087772A - Electromechanical arrangement controlling a movable part in at least two directions - Google Patents

Electromechanical arrangement controlling a movable part in at least two directions Download PDF

Info

Publication number
US3087772A
US3087772A US24985A US2498560A US3087772A US 3087772 A US3087772 A US 3087772A US 24985 A US24985 A US 24985A US 2498560 A US2498560 A US 2498560A US 3087772 A US3087772 A US 3087772A
Authority
US
United States
Prior art keywords
ferromagnetic
gap
movable part
energizable
winding means
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
US24985A
Other languages
English (en)
Inventor
Ascoli Enzo
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.)
Paillard SA
Original Assignee
Paillard SA
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 Paillard SA filed Critical Paillard SA
Application granted granted Critical
Publication of US3087772A publication Critical patent/US3087772A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/49—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes by writing

Definitions

  • My invention has for its object to cut out said drawback and it covers an electromagnetic control system for a part adapted to move at least in two directions.
  • the movable part is controlled by a winding lying in the gap formed between two rnemers made of ferromagnetic material and arranged inside one another, while at least two further windings are carried by at least one of said members, each of said further windings being arranged so as to be capable of generating a magnetic field in a section only of the gap, the magnetic fields having predetermined direct-ions.
  • FIG. 1 is an elevation sectional view of said embodiment through line Il of FIG. 2.
  • FIG. 2 is a cross-section through line Il-II of FIG. 1.
  • the embodiment illustrated forms a tracing arrangement adapted to equip a typewriter of which FIG. 1 shows the platen 1 round which the paper is wound in the conventional manner.
  • the actual arrangement includes a flange 2 of soft iron carrying an outer magnetic armature 4 and an inner magnetic armature 5, both armatures being secured to said flange by screws 3.
  • These two armatures 4 and 5 constituted by laminatio-ns are arranged co- Patented Apr. 30, 1953 axially and are provided each with four pole-pieces 6a and 6b, respectively, the two pole-pieces on the two armatures facing each other pairwise and extending along two diameters perpendicular to each other x and y.
  • pole-pieces are bounded by spherical surfaces having a common center at 0 and they form four narrow gaps 7 between the two armatures.
  • Four windings 22a, 22b, 22c, 22d surround the corresponding pole-pieces of the armature 5 after the manner of a four-pole alternator rotor.
  • a frusto-conical cover 8 secured laterally to the outer armature 4 through the above-mentioned screws 3 carries at its outer end an extension formed by yielding conical fiuidtight bellows 9, the outer end of which is secured to a tubular rod 10 carrying near its other end the moving element of the electromagnetic system.
  • Said movable element is constituted by a support 11, in the shape of a spherical annulus having as a center 0, extending through the gaps 7 and carrying at its periphery a single winding 12; on the other hand, the tubular rod forms at its outer end a tracing point 13 in contact with the paper on the typewriter platen during typewriting.
  • the moving element includes furthermore a ball 16 the center of which lies at ti and through which the tube it) extends to which it is secured and, lastly, connecting and stiffening members for the moving element are provided, as constituted by the disc 17 and the ribs or stays 18 fitted between the tubular rod it) and the annular support 11.
  • the ball id is adapted to rock or pivot freely in all directions without any clearance inside the cylindrical bore formed in a ring 19 of a very hard material, say sapphire.
  • Two rubber washers 2d are urged against the opposite sides of the ring 19 by the flange 2 and the cooperating plate 21 secured thereto by the above mentioned screws 3 and said washers through which the tubular rod 10 passes limit the movements of the ring and consequently of the rod 10 in all directions along the three coordinates x, y and 1 while they provide an elastic return movement for the moving element.
  • the winding 12 is fed "with D.C. of a constant current intensity flowing in the direction of the arrow 23 for instance.
  • the stationary windings 22a and 22c corresponding to the direction x are fed with current in a direction such that the magnetic field passes through the two corresponding gaps 7 as illustrated by the arrows 24 and 25, the movable element is subjected to a torque adapted to shift the tracing point or stylus 13 on the rod 10 in a corresponding direction, until it reaches a position of equilibrium which depends on the characteristic properties of the elastic washers 2t and on the intensity of the field produced. If the current in the two windings is reversed, the direction of the torque will change since the current flowing through the winding 12 remains constant.
  • the modulation of the current in the windings of the x axis produces a modulation of the movement of the stylus in said direction x.
  • the movements of the stylus 13 along the direction x or y are very small with reference to the radii of curvature of the said spherical and cylindrical surfaces so that the spacing between the stylus and the paper is absorbed by very small movements in the direction 2, which latter movements are allowed by the axial elasticity of the washers 20.
  • the movements along the axis z are obtained as follows: the four stationary windings are fed in an identical manner with a current, the direction of which is such, if no modulation in the direction x or y is applied, that the magnetic fields in the four gaps are all directed towards the center 0, or else, away from said center 0.
  • the magnetic circuit closes then through the flange 2 and the winding 12 is subjected to an axial force urging the stylus 13 away or towards the paper sheet according to the direction of the current.
  • the magnitude of said movement in either direction depends on the intensity of the field and on the elastic properties of the Washers 20.
  • the modulating current in the direction z may be superposed over the modulation of the currents in the directions x and y in the different stationary windings without any interference of any of the three variable x, y, z With the other variable.
  • This is ascribable to the fact that the modulating current in the direction 2 for instance in each of the two x windings produces on the moving element two equal forces, facing the same direction in parallelism with the axis z, but the points of application of which are diametrically opposed with reference to the center so that they do not act in the direction x.
  • the same is the case for the windings corresponding to y.
  • variable and independent amplifications of the two signals adapted to control the movements along the axis x and y, so as to modify as desired the ratio between the breadth and the height of the characters independently of the slope and size in one di rection.
  • the DC. of a constant value feeding the movable winding may be replaced by an alternating current provided that at each moment the product i i of the intensities passing through the movable winding and the stationary windings is proportional to the desired modulation.
  • F being the force in grams
  • n the number of convolutions fed with the current i H the intensity of the field in Gauss
  • L the length in centimeters fed by the current i in the field H and i
  • i the currents in amperes.
  • An electromechanical control device for controlling the movement of a movable part in at least two dimensional directions, comprising, in combination, a first ferromagnetic member, a second ferromagnetic member positioned within and spaced from said first ferromagnetic member, whereby a gap is formed therebetween, a first energizable winding means for producing a first magnetic field in a first predetermined dimensional direction within said gap between said ferromagnetic members, a second energizable winding means for producing a second magnetic field in a second predetermined dimensional direction within said gap between said ferromagnetic members, each of said energizable winding means being mounted on one of said ferromagnetic members, and a third energizable winding means for moving the movable part, said third energizable means being movable simultaneously in at least said two dimensional directions within said gap.
  • An electromechanical control device for controlling the movement of a movable part in at least two dimensional directions, comprising, in combination, a first -ferromagnetic member, a second ferromagnetic member positioned within and spaced from said first ferromagnetic member, said members being coaxially positioned with respect to each other, one member including four symmetrically positioned pole pieces, each of said pole pieces of said member facing said other member, whereby a gap including four polar symmetrically positioned elementary gaps is formed, a first energizable winding means for producing a first magnetic field in a first predetermined dimensional direction in one of said elementary gaps, a second energizable winding means for producing a second magnetic field in a second predetermined dimensional direction in another of said elementuy gaps, each of said energizable winding means being mounted on one of said ferromagnetic members, and a third energizable winding means for moving the movable part, said third energiz
  • An electromechanical control device for controlling the movement of a movable part in at least two dimensional directions, comprising, in combination, a first ferromagnetic member, a second ferromagnetic member positioned within and spaced from said first ferromagnetic member, said members being coaxially positioned with respect to each other, one member including four symmetrically positioned pole pieces, each of said pole pieces of said member facing the other member, whereby a gap including four polar symmetrically positioned elementary gaps is formed, each of said pole pieces having positioned therearound a separate energizable winding means for producing a magnetic field in a predetermined dimensional direction in each of said elementary gaps, and an additional energizable winding means for moving the movable part, said additional energizable winding means extending through said four elementary gaps and being movable simultaneously in at least two dimensional directions within said gap.
  • An electromechanical control device for controlling the movement of a movable part in at least two dimensional directions, comprising, in combination, a first ferromagnetic member, a second ferromagnetic member positioned within and spaced from said first ferromagnetic member, whereby a gap is formed thcrebetween, said second ferromagnetic member being provided with a central recess, means pivotally mounted within said recess and carrying the movable part for moving the movable part in at least two dimensional directions within said recess, a ferromagnetic flange means for securely holding said ferromagnetic members, a first energizable winding means for producing a first magnetic field in a first predetermined dimensional direction within said gap between said ferromagnetic members, a second energizable winding means for producing a second magnetic field in a second predetermined dimensional direction within said gap between said ferromagnetic members, each of said energizable winding means :being mounted on one
  • said means pivotally mounted within said recess comprise a ball-shaped member rigid with respect to said movable part, a ring provided with a cylindrical bore in which said ball-shaped member is positioned, said ring being revolvably positioned in said recess, and elastic means for holding said ring in position in said recess, said elastic means engaging said ball-shaped member and being secured to said second ferromagnetic member.
  • the device of claim 4 including ferromagnetic flange means for securely holding said ferromagnetic members, said second ferromagnetic member being provided with a central recess, a ring provided with a cylindrical bore, said ring being revolvably positioned in said recess, a ballshaped member being pivotally positioned in said recess, said ball-shaped member being rigid with respect to said movable part, and elastic means for holding said ring in position in said recess, said elastic means engaging said ball-shaped member and being secured to said second ferromagnetic member.
  • a stylus movable in at least two dimensional directions and an electromechanical control device for controlling the movement of said stylus in said two dimensional directions, said control device comprising a first ferromagnetic member and a second ferromagnetic member positioned therewithin and spaced from said first ferromagnetic member, said members being coaxially positioned with respect to each other, one member including four symmetrically positioned pole pieces, each of said pole pieces of said member facing the other member, whereby a gap including four polar symmetrically positioned elementary gaps is formed, each of said pole pieces having positioned therearound a separate energizable winding means for producing a magnetic field in a predetermined dimensional direction in each of said elementary gaps, ferromagnetic flange means for securely holding said ferromagnetic members, said second ferromagnetic member being provided with a central recess, a ring member provided with a cylindrical bore, said ring member being revolvably positioned in said recess, a ballshaped
  • the device of claim 4 including means for feeding each of said windings positioned around each of said pole pieces with modulated alternating currents, thereby to produce a magnetic field of a predetermined dimensional direction in each of said elementary gaps, and means for feeding said additional energizable winding means with a constant direct current.
  • the device of claim 4 including means for feeding said additional energizable winding means with alternating current at a predetermined frequency and means for feeding each of said windings positioned around each of said pole pieces with modulated alternating currents having a phase lead of 1r/2 with reference to the current feeding said additional energizable winding means.
  • said two ferromagnetic members are coaxially positioned with respect to each other, and including means for feeding said additional energizable winding means with alternating current at a predetermined frequency and means for feeding said windings with modulated alternating currents along the axes of said ferromagnetic members and in two perpendicular dimensional directions with respect to said axes.

Landscapes

  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US24985A 1959-05-29 1960-04-27 Electromechanical arrangement controlling a movable part in at least two directions Expired - Lifetime US3087772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3087772X 1959-05-29

Publications (1)

Publication Number Publication Date
US3087772A true US3087772A (en) 1963-04-30

Family

ID=4574008

Family Applications (1)

Application Number Title Priority Date Filing Date
US24985A Expired - Lifetime US3087772A (en) 1959-05-29 1960-04-27 Electromechanical arrangement controlling a movable part in at least two directions

Country Status (2)

Country Link
US (1) US3087772A (fr)
CH (1) CH352348A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492728A (en) * 1967-12-26 1970-02-03 Eastman Kodak Co Film marking stylus
FR2358985A1 (fr) * 1976-07-19 1978-02-17 Olivetti & Co Spa Imprimante electronique comportant un seul element d'impression de caracteres alphanumeriques
US4100550A (en) * 1976-03-30 1978-07-11 Siemens Aktiengesellschaft Liquid jet recorder
US4149807A (en) * 1976-03-04 1979-04-17 Facit Aktiebolag Method of typewriting or printing
US4458227A (en) * 1982-04-12 1984-07-03 Polaroid Corporation Electromagnetic actuators
US4707642A (en) * 1983-03-03 1987-11-17 Canon Kabushiki Kaisha Actuating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2004735A (en) * 1928-07-27 1935-06-11 Rca Corp Loud speaker
US2702369A (en) * 1949-01-14 1955-02-15 Dreyfus Jean Albert Dynamic indicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2004735A (en) * 1928-07-27 1935-06-11 Rca Corp Loud speaker
US2702369A (en) * 1949-01-14 1955-02-15 Dreyfus Jean Albert Dynamic indicator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492728A (en) * 1967-12-26 1970-02-03 Eastman Kodak Co Film marking stylus
US4149807A (en) * 1976-03-04 1979-04-17 Facit Aktiebolag Method of typewriting or printing
US4100550A (en) * 1976-03-30 1978-07-11 Siemens Aktiengesellschaft Liquid jet recorder
FR2358985A1 (fr) * 1976-07-19 1978-02-17 Olivetti & Co Spa Imprimante electronique comportant un seul element d'impression de caracteres alphanumeriques
US4150902A (en) * 1976-07-19 1979-04-24 Ing. C. Olivetti & C. Electronic printer having a single tracing element for tracing out alphanumeric characters
US4458227A (en) * 1982-04-12 1984-07-03 Polaroid Corporation Electromagnetic actuators
US4707642A (en) * 1983-03-03 1987-11-17 Canon Kabushiki Kaisha Actuating device

Also Published As

Publication number Publication date
CH352348A (fr) 1961-02-28

Similar Documents

Publication Publication Date Title
US3149254A (en) Linear motor or generator
GB1095098A (en) Facsimile recording apparatus
US3087772A (en) Electromechanical arrangement controlling a movable part in at least two directions
US2556816A (en) Polarized electromagnetic operator with damped coil armature
US1784517A (en) Motor for loud-speakers
US3899699A (en) Brushless linear DC motor actuator
US2781461A (en) Electromagnetic vibration exciter
ES2101720T3 (es) Un conjunto de transductor/transformador de pelicula fina.
US3700829A (en) Magnetic stereophonic phonograph pickup
US3587016A (en) Null adjuster for magnetically operated torque motors
CN105744450A (zh) 动圈式立体声拾音头
US2118862A (en) Dynamic translating device
JPS6318431B2 (fr)
JPS54136331A (en) Image recorder
US2967214A (en) Moving coil electro-mechanical transducers
US2478329A (en) Mounting means for the moving coils of electromechanical translating devices
US3609422A (en) Wobble element motor
US6198179B1 (en) Linear actuator
US2932776A (en) Direct recording oscillograph
FR2234755A5 (en) Electrodynamic percussion marking system - has stylo point coils working in magnetic field in air gap
US2842617A (en) Method and apparatus for generating phasing pulses
US2948842A (en) Transducer
US1758797A (en) Loud-speaker
CA1077858A (fr) Cellule electrodynamique
US3683128A (en) Flux-bridging stereophonic pickup