GB639794A - Improvements in or relating to electron-discharge tubes - Google Patents

Improvements in or relating to electron-discharge tubes

Info

Publication number
GB639794A
GB639794A GB20927/47A GB2092747A GB639794A GB 639794 A GB639794 A GB 639794A GB 20927/47 A GB20927/47 A GB 20927/47A GB 2092747 A GB2092747 A GB 2092747A GB 639794 A GB639794 A GB 639794A
Authority
GB
United Kingdom
Prior art keywords
shielding plate
plate
electrode
valve
condenser
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
GB20927/47A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB639794A publication Critical patent/GB639794A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/12—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/44—One or more circuit elements structurally associated with the tube or lamp

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

639,794. Thermionic valves. PHILIPS LAMPS, Ltd. Aug. 1, 1947, No. 20927. Convention date, Aug. 6, 1946. [Class 39 (i)] In a valve as disclosed in Specification 611,381, comprising a shielding plate 2 and a trimming condenser, one electrode of which is constituted by a part of the shielding plate, and is separated from the semi-circular plate 4 which is secured to a contact pin 3 and forms the other electrode, by a dielectric in the form of an insulating plate 5 which is rotatable about the contact pin 3 and has an aperture 6 which varies the capacity of the condenser when rotation is effected through the slot 7, said shielding plate 2 is provided with incisions 8 and 9 so that the portion which functions as an electrode of the trimming condenser is resilient and engages the insulating plate 5 with a definite pressure, thus preventing movement of the latter during transport or due to thermal strains in the shielding plate 2. The latter is embossed at several points, thus forming elevations 10 which bear against the bottom of the valve and prevent the shielding plate from being slightly pressed in when the valve is inserted in a holder, with consequent possibility of movement of the insulating plate 5.
GB20927/47A 1946-08-06 1947-08-01 Improvements in or relating to electron-discharge tubes Expired GB639794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL259237X 1946-08-06

Publications (1)

Publication Number Publication Date
GB639794A true GB639794A (en) 1950-07-05

Family

ID=19781434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20927/47A Expired GB639794A (en) 1946-08-06 1947-08-01 Improvements in or relating to electron-discharge tubes

Country Status (7)

Country Link
US (1) US2488791A (en)
BE (1) BE475088A (en)
CH (1) CH259237A (en)
DE (1) DE809326C (en)
FR (1) FR950959A (en)
GB (1) GB639794A (en)
NL (1) NL69237C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2620378A (en) * 1949-11-29 1952-12-02 Standard Coil Prod Co Inc Fine tuner for turret type tuners
US2768300A (en) * 1952-04-09 1956-10-23 Standard Coil Prod Co Inc Fine tuner for turret type tuners
US2748328A (en) * 1953-12-14 1956-05-29 Premier Res Lab Inc Combination pronged base for electrical devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1923552A (en) * 1928-10-24 1933-08-22 Murphy Edmund Guyer Vacuum tube

Also Published As

Publication number Publication date
BE475088A (en)
NL69237C (en)
DE809326C (en) 1951-07-26
US2488791A (en) 1949-11-22
CH259237A (en) 1949-01-15
FR950959A (en) 1949-10-12

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