GB1290355A - - Google Patents

Info

Publication number
GB1290355A
GB1290355A GB1290355DA GB1290355A GB 1290355 A GB1290355 A GB 1290355A GB 1290355D A GB1290355D A GB 1290355DA GB 1290355 A GB1290355 A GB 1290355A
Authority
GB
United Kingdom
Prior art keywords
resistors
dec
secured
glass
contact
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
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 filed Critical
Publication of GB1290355A publication Critical patent/GB1290355A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/06—Adjustable resistors adjustable by short-circuiting different amounts of the resistive element
    • H01C10/08—Adjustable resistors adjustable by short-circuiting different amounts of the resistive element with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)
  • Slide Switches (AREA)

Abstract

1290355 Attenuators WESTERN ELECTRIC CO Inc 16 Dec 1969 -[20 Dec 1968] 61110/69 Heading H1S An adjustable attenuator comprises a number of thin film resistors on a common substrate 202, spring contacts 204, 211 being slidably adjustable on each resistor so that it can be cut into or out of circuit. The spring contact portions are bifurcated so that each contact can be moved to bridge a pair of terminal points on the resistive elements. The resistors are combined into balanced "H" pads. The resistors (tantalum nitride) are connected by printed circuitry, are provided with contact pads (50A, 50B-61A, 61B, Fig. 5, not shown) of platinum, titanium or rhodium with gold and are carried on a substrate 202 of glass, glass with an oxide underlay, glazed alumina or superfine alumina. The resistors may be of Ta 2 N. They are tailored by anodizing to obtain suitable insertion loss and impedance parameters. The spring contacts 204, 211 are secured to sliders 203 which are secured to and movable by manually operable members 206. Terminals 207 are connected to the printed circuitry through holes 208 in the base 201 which may be ultra-sonically welded to the cover 205.
GB1290355D 1968-12-20 1969-12-16 Expired GB1290355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78571568A 1968-12-20 1968-12-20

Publications (1)

Publication Number Publication Date
GB1290355A true GB1290355A (en) 1972-09-27

Family

ID=25136400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290355D Expired GB1290355A (en) 1968-12-20 1969-12-16

Country Status (7)

Country Link
US (1) US3551872A (en)
JP (1) JPS4813785B1 (en)
BE (1) BE743203A (en)
DE (1) DE1962951A1 (en)
FR (1) FR2026680A1 (en)
GB (1) GB1290355A (en)
NL (1) NL6918768A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28565E (en) * 1971-07-29 1975-09-30 Adjustable active equalizer
US3837067A (en) * 1971-12-23 1974-09-24 Bunker Ramo Method of making integrated circuit package
US3784948A (en) * 1971-12-23 1974-01-08 Bunker Ramo Integrated circuit package of unified structure with variable resistor
US3769480A (en) * 1972-06-15 1973-10-30 Eaton Corp Hoist electric control handle with first operating means, including a movable s-shaped resistor, and second operating means
JPS6241325U (en) * 1985-08-31 1987-03-12
JPS6255309U (en) * 1985-09-25 1987-04-06
JPH0340826U (en) * 1989-08-30 1991-04-19

Also Published As

Publication number Publication date
JPS4813785B1 (en) 1973-04-28
BE743203A (en) 1970-05-28
DE1962951A1 (en) 1970-07-02
US3551872A (en) 1970-12-29
FR2026680A1 (en) 1970-09-18
NL6918768A (en) 1970-06-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees