GB585914A - Improvements relating to supports for electron discharge devices - Google Patents

Improvements relating to supports for electron discharge devices

Info

Publication number
GB585914A
GB585914A GB1643741A GB1643741A GB585914A GB 585914 A GB585914 A GB 585914A GB 1643741 A GB1643741 A GB 1643741A GB 1643741 A GB1643741 A GB 1643741A GB 585914 A GB585914 A GB 585914A
Authority
GB
United Kingdom
Prior art keywords
disc
screen
sheets
valve
box
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
GB1643741A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1643741A priority Critical patent/GB585914A/en
Publication of GB585914A publication Critical patent/GB585914A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/002—Casings with localised screening
    • H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Particle Accelerators (AREA)

Abstract

585,914. Wireless signalling apparatus. STANDARD TELEPHONES & CABLES, Ltd., and SMYTH, C. N. Dec. 19, 1941, No. 16437. [Class 40 (v)] A screening box for a thermionic valve of the disc-seal type such as that described in Specification 585,448, comprises a metal box E having a partition B divided into two halves at line X, the upper half sliding in guides C. Each half of the screen is made of two sheets of metal held together by screws and spring washers D. In assembly, the top half B is removed and a disc-seal valve is inserted in the aperture with the disc lying between the two plates of the screen and the top half is replaced. This effectively screens the anode end of the valve from the cathode end, and the grid, which is connected to the disc is earthed. If this is not desired, the two sheets comprising the screen may be lined with thin mica sheets, which will then only earth the grid for high frequencies. More than one partition may be provided and the box is provided with a metal lid having overlapping edges.
GB1643741A 1941-12-19 1941-12-19 Improvements relating to supports for electron discharge devices Expired GB585914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1643741A GB585914A (en) 1941-12-19 1941-12-19 Improvements relating to supports for electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1643741A GB585914A (en) 1941-12-19 1941-12-19 Improvements relating to supports for electron discharge devices

Publications (1)

Publication Number Publication Date
GB585914A true GB585914A (en) 1947-02-28

Family

ID=10077303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1643741A Expired GB585914A (en) 1941-12-19 1941-12-19 Improvements relating to supports for electron discharge devices

Country Status (1)

Country Link
GB (1) GB585914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887525A (en) * 1956-09-25 1959-05-19 Alexander J Lewus Electrical wiring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887525A (en) * 1956-09-25 1959-05-19 Alexander J Lewus Electrical wiring apparatus

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