US3678313A - Motor armature having an integral driving surface - Google Patents

Motor armature having an integral driving surface Download PDF

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Publication number
US3678313A
US3678313A US116774A US3678313DA US3678313A US 3678313 A US3678313 A US 3678313A US 116774 A US116774 A US 116774A US 3678313D A US3678313D A US 3678313DA US 3678313 A US3678313 A US 3678313A
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US
United States
Prior art keywords
armature
tubular
conductors
driving element
tabs
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
US116774A
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English (en)
Inventor
John E Parker
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.)
International Business Machines Corp
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International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of US3678313A publication Critical patent/US3678313A/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/26—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings

Definitions

  • ABSTRACT An integral capstan and tubular printed circuit armature for [21] App]. No.:
  • the present invention relates to an improved armature of a type including, as an integral portion thereof, a cylindrical driving element or capstan.
  • a prior art integrated tubular armature-capstan structure is disclosed in U.S. Pat. No. 3,490,672, issued to Gene A. Fisher and Howard A. Van Winkle.
  • the preferred embodiment of the present invention utilizes a printed circuit armature and method of making as disclosed in my copending United States patent application, Ser. No. 6,816, filed Jan. 29, 1970, now U.S. Pat. No. 3,623,220.
  • the preferred embodiment of the present invention is a tubular armature and utilizes, as a portion of the capstan, an epoxy-fiberglass tube which is axially spaced from the likematerial tube disclosed in my above-mentioned copending patent application.
  • the metallic interconnect tabs are axially extended beyond the annular band where electrical interconnect is achieved, to bridge the annular gap between the epoxyfiberglass tube which forms the armature and the second fiberglass tube which is a part of the capstan.
  • the inner conductors of the armature extend axially over the inner circumference of the second tube, and the outer conductors similarly bridge the annulus and extend axially over the outer circumference of the second tube.
  • FIGS. 1 and 2 disclose an integral capstan motor armature such as is disclosed in the above-mentioned patent to G A. Fisher et al., which utilizes the tubular armature of the present invention,
  • FIG. 3 is an enlarged section view of the armature of FIG. 1, showing the manner in which the interconnect tabs mount the capstan drive tube to the armature, and
  • FIG. 4 shows a modified form of capstan.
  • FIGS. 1 and 2 disclose a capstan motor for use in a magnetic tape unit, this capstan motor having an integral cylindrical driving element, or capstan, mounted directly on one end of a low inertia, printed circuit, tubular armature.
  • a motor of this general type is disclosed in the above-mentioned patent to G. A. Fisher et al., and reference may be had to that patent for a detailed description of the structure of the motor.
  • the basic elements of this motor consist of permanent magnets which are mounted in a cluster about tubular printed circuit armature 11.
  • This armature surrounds a magnetic flux return path 12 which includes shafts 13 and 14 to facilitate the mounting of member 12 at a fixed, nonrotatable position within the motor structure.
  • Armature 11 is rotatably mounted upon shafts l3 and 14 by means of bearings 15 and 16.
  • Bearing 15 is insulated from the electrical conductors on the inside circumferential surface of armature 11, whereas bearing 16 mounts the inside circumferential surface of capstan driving element 17 relative to shaft 14.
  • capstan driving surface 17 is shown cooperating with a section of magnetic tape 20, shown in phantom. Also, this figure discloses a disk 21 which forms a portion of an optical tachometer, which in turn is utilized in a digital velocity servomechanism (not shown) to control the speed of rotation of capstan 17.
  • this view is an enlarged section of the armature of FIG. 1, showing the manner in which the interconnecting tabs of the armature winding mount the capstan drive surface 17 to one end of the armature.
  • Drive surface 17 is shown as a single thickness fiberglass tube. Normally, the tube carries a rubber-like drive surface to frictionally engage tape 20.
  • the armature per se may be formed in accordance with the teachings of my above-mentioned copending patent application, wherein the inner and outer winding conductor configuration is formed on a fiberglass tube by means of an electroforrning process followed by a chemical etch to obtain the circuit pattern.
  • reference numeral 30 identifies a reinforced plastic tube such as a fiberglass/epoxy tube which supports copper electrical conductors 32 on the inner tubular surface thereof.
  • the outer tubular surface is likewise covered by a plurality of conductors 33.
  • the inner and outer conductors of this armature electrically interconnect at annular end portions 34 and 35 to form a plurality of interconnect tabs.
  • these individual conductors extend beyond interconnect portion 35 to engage the inner and outer tubular surfaces of the tubular fiberglass capstan driving element 17.
  • the mounting portion 40 of capstan 17 is a coaxial extension of fiberglass tube 31 which is axially displaced therefrom to form the annular space 35 wherein the interconnect tabs connect the inner and outer circuit conductors.
  • the inner and outer conductors extend axially beyond the electrical interconnect portion 35 to form extending tabs 41 and 42.
  • the tabs 41 circle the outside surface of tube 40 whereas the tabs 42 circle the inside surface of the tube.
  • the function of these tabs 41 and 42 is to mechanically mount capstan 17 in a rigid nonvibratory manner on the end of tubular armature l 1 without obstructing the driving surface of capstan driving element 17.
  • FIG. 4 discloses a modified form of capstan 50 wherein the diameter of the capstan is substantially identical to the diameter of the fiberglass tube which forms the control tube of armature 51.
  • a tubular armature constructed in accordance with the teachings of the present invention has been constructed having the following dimensions: the total length of the armature and capstan as viewed in FIG. 4 was 9.480 inches; the diameter of armature l l was 1.030 inches; the diameter of capstan 17 was 1.018 inches; the axial gap 35 between tubes 30 and 40 was 0.140 inches; the width of conductors 32 and 33, measured in a circumferential direction was 0.060 inches, the thickness of these conductors, measured in a radial direction, was 0.005 inches, and the circumferential space between these conductors was 0.011 inches; the thickness of fiberglass tubes 30 and 40, measured in a radial direction, was 0.008 inches.
  • the portion of capstan 50 that engages and drives tape was formed by an additional sleeve having a thickness of 0.150 inches, this sleeve being secured to the outer surface of capstan 50 and included a rubber-like tape driving surface.
  • an improved armature comprising;
  • an armature formed of an array of metallic winding conductors including an annular pattern of metallic interconnect tabs whereat the armature winding changes direction
  • a cylindrical driving element constituting the rotational output means of the motor, said driving element having a driving interface on its circumference adapted to engage a load to be driven by the motor, and
  • said armature is a tubular armature including inner, central and outer concentric layers, the central layer being a tube of electrical insulating material which constitutes the mechanical support for the inner and outer layers, said inner and outer layers providing inner and outer armature winding patterns of electrical conductive metal, in each layer of which the individual conductors axially extend beyond the ends of said central layer and electrically connect to a conductor in the layer on the other side of said central layer, to form an annular pattern of metallic interconnect tabs at each end of said armature, and wherein a mounting portion of said driving element is supported by the interconnect tabs at one end of said tubular armature, said mounting portion being spaced from said driving interface.
  • a tubular armature for use as the rotor of an electric machine comprising; 7
  • tubular driving element having a driving interface and a tubular mounting portion spaced from said driving interface and mounted on said end tabs at one end of said tubular array of winding conductors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Dc Machiner (AREA)
US116774A 1971-02-19 1971-02-19 Motor armature having an integral driving surface Expired - Lifetime US3678313A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11677471A 1971-02-19 1971-02-19

Publications (1)

Publication Number Publication Date
US3678313A true US3678313A (en) 1972-07-18

Family

ID=22369131

Family Applications (1)

Application Number Title Priority Date Filing Date
US116774A Expired - Lifetime US3678313A (en) 1971-02-19 1971-02-19 Motor armature having an integral driving surface

Country Status (5)

Country Link
US (1) US3678313A (enrdf_load_stackoverflow)
JP (1) JPS559907B1 (enrdf_load_stackoverflow)
DE (1) DE2207333C3 (enrdf_load_stackoverflow)
FR (1) FR2125276B1 (enrdf_load_stackoverflow)
GB (1) GB1371117A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB389295I5 (enrdf_load_stackoverflow) * 1973-08-17 1975-01-28
US5524805A (en) * 1988-06-14 1996-06-11 Kabushikigaisha Tokyo Kikai Seisakusho Web feed roller and drive control system thereof
US6072252A (en) * 1997-04-03 2000-06-06 Electric Boat Corporation Composite electric motor shaft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51130001U (enrdf_load_stackoverflow) * 1975-04-10 1976-10-20

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799347A (en) * 1929-07-05 1931-04-07 Vincent G Apple Armature
US3209187A (en) * 1961-05-12 1965-09-28 Angele Wilhelm Printed armature device
US3312846A (en) * 1962-09-11 1967-04-04 Printed Motors Inc Electric rotating machines
US3490672A (en) * 1968-06-17 1970-01-20 Ibm Motion control device
US3532916A (en) * 1969-05-19 1970-10-06 Ibm Synchronous rotating machines having non-magnetic tubular armatures
US3588556A (en) * 1969-12-23 1971-06-28 Ibm Low impedance transverse cooling of electric motors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623220A (en) * 1970-01-29 1971-11-30 Ibm Method of making a tubular printed circuit armature using plating techniques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1799347A (en) * 1929-07-05 1931-04-07 Vincent G Apple Armature
US3209187A (en) * 1961-05-12 1965-09-28 Angele Wilhelm Printed armature device
US3312846A (en) * 1962-09-11 1967-04-04 Printed Motors Inc Electric rotating machines
US3490672A (en) * 1968-06-17 1970-01-20 Ibm Motion control device
US3532916A (en) * 1969-05-19 1970-10-06 Ibm Synchronous rotating machines having non-magnetic tubular armatures
US3588556A (en) * 1969-12-23 1971-06-28 Ibm Low impedance transverse cooling of electric motors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB389295I5 (enrdf_load_stackoverflow) * 1973-08-17 1975-01-28
US3914631A (en) * 1973-08-17 1975-10-21 Ibm Capstan motor having a ceramic output shaft and an adhesively attached capstan
US5524805A (en) * 1988-06-14 1996-06-11 Kabushikigaisha Tokyo Kikai Seisakusho Web feed roller and drive control system thereof
US6072252A (en) * 1997-04-03 2000-06-06 Electric Boat Corporation Composite electric motor shaft

Also Published As

Publication number Publication date
DE2207333C3 (de) 1982-02-11
JPS559907B1 (enrdf_load_stackoverflow) 1980-03-12
FR2125276A1 (enrdf_load_stackoverflow) 1972-09-29
JPS4720602A (enrdf_load_stackoverflow) 1972-09-30
DE2207333B2 (de) 1981-06-11
GB1371117A (en) 1974-10-23
DE2207333A1 (de) 1972-08-31
FR2125276B1 (enrdf_load_stackoverflow) 1974-11-08

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