GB1186551A - Improvements in Resistor Elements - Google Patents

Improvements in Resistor Elements

Info

Publication number
GB1186551A
GB1186551A GB1268467A GB1268467A GB1186551A GB 1186551 A GB1186551 A GB 1186551A GB 1268467 A GB1268467 A GB 1268467A GB 1268467 A GB1268467 A GB 1268467A GB 1186551 A GB1186551 A GB 1186551A
Authority
GB
United Kingdom
Prior art keywords
coating
fluidized bed
block
resistor
dipping
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
Application number
GB1268467A
Inventor
Edward John Ogle
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.)
POWER DEV Ltd
Original Assignee
POWER DEV Ltd
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 POWER DEV Ltd filed Critical POWER DEV Ltd
Priority to GB1268467A priority Critical patent/GB1186551A/en
Publication of GB1186551A publication Critical patent/GB1186551A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/06—Electrostatic or electromagnetic shielding arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1,186,551. Resistor manufacture. POWER DEVELOPMENT Ltd. 14 June, 1968 [17 March, 1967], No. 12684/67 Headings H1K and H1S. A -resistor body is coated for protection and insulation with powdered material by dipping into a fluidized bed of the material. A cylindrical resistor block, which may have non-linear characteristics, to be coated is produced by firing a powder, extruded paste or a cast slip mass. The flat end faces are then metallized, leaving a peripheral annular zone free from metal to provide contacts, prior to dipping. If the coating is of a synthetic resin, for example, an epoxy resin, the resistor block is heated prior to dipping sufficiently to fuse the powder on to the block in the fluidized bed. Additional heating to a higher temperature after removal from the fluidized bed ensures a fully cured, coherent coating. If the coating is a refractory metal oxide such as alumina or a mixture of such oxides, adherence of the powder in the fluidized bed to the resistor block is achieved by prior coating of the block with an adhesive slurry containing ethanol, water, ethyl silicate, hydrochloric acid and zirconia. Subsequent heat treatment in a suitable atmosphere then hardens the coating. The coating process may be repeated to obtain adequate layer thickness. The metallized end portions do not receive any coating. Specification 764,693 is referred to.
GB1268467A 1967-03-17 1967-03-17 Improvements in Resistor Elements Expired GB1186551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1268467A GB1186551A (en) 1967-03-17 1967-03-17 Improvements in Resistor Elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1268467A GB1186551A (en) 1967-03-17 1967-03-17 Improvements in Resistor Elements

Publications (1)

Publication Number Publication Date
GB1186551A true GB1186551A (en) 1970-04-02

Family

ID=10009236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1268467A Expired GB1186551A (en) 1967-03-17 1967-03-17 Improvements in Resistor Elements

Country Status (1)

Country Link
GB (1) GB1186551A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees