US3217390A - Precision electrical component - Google Patents

Precision electrical component Download PDF

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Publication number
US3217390A
US3217390A US177023A US17702362A US3217390A US 3217390 A US3217390 A US 3217390A US 177023 A US177023 A US 177023A US 17702362 A US17702362 A US 17702362A US 3217390 A US3217390 A US 3217390A
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US
United States
Prior art keywords
core
electrical component
precision electrical
wire
winding
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
US177023A
Inventor
Hoyte John Merrishaw
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Priority to US177023A priority Critical patent/US3217390A/en
Application granted granted Critical
Publication of US3217390A publication Critical patent/US3217390A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
    • H01C3/20—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding wound on cylindrical or prismatic base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/04—Apparatus or processes specially adapted for manufacturing resistors adapted for winding the resistive element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making

Definitions

  • This invention relates to a precision electrical component such as a wound resistor.
  • the main object of this invention is to relieve the stresses imposed on a wire wound on a core.
  • a change in the stress on the wire of a wound resistor changes the cross-sectional area of the wire and therefore its resistance.
  • FIGURE 1 shows a core 3 made of a deformable elastic material such as Dow Corning Silicone Rubber No. 80.
  • This core 3 is provided with end flanges 5 and with an axial aperture through which a bolt 6 provided with a head 7 and a nut 8 may be inserted.
  • the nut Before Winding the wire 9, the nut is turned until the core 3 is compressed, thus reducing its length and increasing its diameter.
  • the wire 9 is then wound in planes perpendicular to the axis of the core. When this is done, the bolt 6 is removed, thus reducing again "ice the diameter of the core and leaving the winding somewhat loosely thereon. Thus there is no need to match the coefficients of expansion of the core 3 and of the wire 9.
  • the method of making a precision electrical component including a wire and a permanent, deformable elastic core comprising the steps of subjecting said core to a compression force along an axis to increase uniformly the diameter of said core, winding said wire on the expanded surface of said core in planes substantially perpendicular to said axis, and releasing said compression force to leave said winding somewhat loosely mounted on said core.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Adjustable Resistors (AREA)

Description

Nov. 16, 1965 J. M. HOYTE 3,217,390
PRECISION ELECTRICAL COMPONENT Filed March 2, 1962 7 r ll/14420001114 g INVENTOR JOHN M. HOYTE ATTORNEY United States Patent 3,217,390 PRECISION ELECTRICAL COMPONENT John Merrishaw Hoyte, Palo Alto, Califrl, assignor t0 Hewlett-Packard Company, Palo Alto, Calif., 21 corporation of California Filed Mar. 2, 1962, Ser. No. 177,023 1 Claim. (Cl. Z9155.62)
This invention relates to a precision electrical component such as a wound resistor.
The main object of this invention is to relieve the stresses imposed on a wire wound on a core. A change in the stress on the wire of a wound resistor changes the cross-sectional area of the wire and therefore its resistance.
Referring to the drawing, FIGURE 1 shows a core 3 made of a deformable elastic material such as Dow Corning Silicone Rubber No. 80. This core 3 is provided with end flanges 5 and with an axial aperture through which a bolt 6 provided with a head 7 and a nut 8 may be inserted. Before Winding the wire 9, the nut is turned until the core 3 is compressed, thus reducing its length and increasing its diameter. The wire 9 is then wound in planes perpendicular to the axis of the core. When this is done, the bolt 6 is removed, thus reducing again "ice the diameter of the core and leaving the winding somewhat loosely thereon. Thus there is no need to match the coefficients of expansion of the core 3 and of the wire 9.
I claim:
The method of making a precision electrical component including a wire and a permanent, deformable elastic core, said method comprising the steps of subjecting said core to a compression force along an axis to increase uniformly the diameter of said core, winding said wire on the expanded surface of said core in planes substantially perpendicular to said axis, and releasing said compression force to leave said winding somewhat loosely mounted on said core.
References Cited by the Examiner UNITED STATES PATENTS 3/1877 Curtis et al. 29-155.57 8/1951 Dougherty 242l10
US177023A 1962-03-02 1962-03-02 Precision electrical component Expired - Lifetime US3217390A (en)

Priority Applications (1)

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US177023A US3217390A (en) 1962-03-02 1962-03-02 Precision electrical component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US177023A US3217390A (en) 1962-03-02 1962-03-02 Precision electrical component

Publications (1)

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US3217390A true US3217390A (en) 1965-11-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455344A1 (en) * 1979-04-24 1980-11-21 Lippmaa Endel Wire-wound alternating current resistor - designed so that no mechanical stress develops when the bobbin expands thermally

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US359205A (en) * 1887-03-08 best available cop
US2563994A (en) * 1947-08-26 1951-08-14 American Viscose Corp Dual purpose creel adapter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US359205A (en) * 1887-03-08 best available cop
US2563994A (en) * 1947-08-26 1951-08-14 American Viscose Corp Dual purpose creel adapter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455344A1 (en) * 1979-04-24 1980-11-21 Lippmaa Endel Wire-wound alternating current resistor - designed so that no mechanical stress develops when the bobbin expands thermally

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