GB1252874A - - Google Patents

Info

Publication number
GB1252874A
GB1252874A GB1252874DA GB1252874A GB 1252874 A GB1252874 A GB 1252874A GB 1252874D A GB1252874D A GB 1252874DA GB 1252874 A GB1252874 A GB 1252874A
Authority
GB
United Kingdom
Prior art keywords
strip
capacitor
section
attenuator
plate
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 GB1252874A publication Critical patent/GB1252874A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • 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

  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Adjustable Resistors (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Networks Using Active Elements (AREA)
  • Attenuators (AREA)

Abstract

1,252,874. Attenuators. TEKTRONIX Inc. 13 May, 1970 [3 June, 1969], No. 23130/70. Heading H3U. [Also in Division H1] A step attenuator of the rotary turret type (see Division H1) comprises a plurality of elongated attenuator sections 12 mounted on metal plates 56 and has means for grounding the plate 56 of the selected section via two oppositelydirected parallel current paths (Figs. 3 and 4, not shown) whereby the attenuator section has extremely low inductance and a wide frequency bandwidth. Each section 12 comprises a ceramic strip 68 bonded to the metal plate 56 and carrying respective input and output contacts 74 and 76. Voltage divider resistors 70 and 72 are formed as coatings on the bottom of strip 68 and are connected to the contacts 74, 76 by soldering at their lower ends. A variable capacitor 80 controls the input capacitance of the section and has part formed by a metalized portion of the ceramic strip 68, while a variable coupling capacitor 82 is similarly formed. Apertures 88 and 90 in plate 56 enable adjustment of capacitors 80 and 82 respectively. A damping resistor 84 providsd as a coating on the top of strip 68 prevents ringing without attenuating a D.C. signal being transmitted. A shunt capacitor 86 may be provided as shown to form an A.C. voltage divider with capacitor 82.
GB1252874D 1969-06-03 1970-05-13 Expired GB1252874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83007169A 1969-06-03 1969-06-03

Publications (1)

Publication Number Publication Date
GB1252874A true GB1252874A (en) 1971-11-10

Family

ID=25256242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1252874D Expired GB1252874A (en) 1969-06-03 1970-05-13

Country Status (6)

Country Link
US (1) US3622919A (en)
JP (1) JPS5021335B1 (en)
DE (1) DE2027286A1 (en)
FR (1) FR2053910A5 (en)
GB (1) GB1252874A (en)
NL (1) NL7007885A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175764A (en) * 1985-06-01 1986-12-03 Crystalate Electronics Attenuator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5247846U (en) * 1975-10-01 1977-04-05
US4001736A (en) * 1975-12-30 1977-01-04 Malcolm Bruce G Direct contact rotary attenuator
US4107633A (en) * 1976-11-24 1978-08-15 Weinschel Engineering Co. Broadband microwave card attenuator
US4684905A (en) * 1983-12-14 1987-08-04 Weinschel Engineering Load-bearing detent mechanism
DK9300498U3 (en) * 1993-11-11 1993-12-24 N L Elektronik V Niels Larsen Attenuator preferably for audio signals
JP6512451B2 (en) * 2016-03-29 2019-05-15 株式会社オートネットワーク技術研究所 Power supply

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB514454A (en) * 1938-05-06 1939-11-08 Standard Telephones Cables Ltd Improvements in or relating to attenuators for electric currents and to connecting means therefor
US3215959A (en) * 1963-08-19 1965-11-02 Tektronix Inc Shielded electrical attenuator assembly
US3219953A (en) * 1963-08-30 1965-11-23 Singer Co Direct turn step attenuator
US3299373A (en) * 1964-08-31 1967-01-17 Conney Marcellus Coaxial step attenuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175764A (en) * 1985-06-01 1986-12-03 Crystalate Electronics Attenuator

Also Published As

Publication number Publication date
US3622919A (en) 1971-11-23
NL7007885A (en) 1970-12-07
FR2053910A5 (en) 1971-04-16
JPS5021335B1 (en) 1975-07-22
DE2027286A1 (en) 1971-03-25

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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