US1659542A - Shielding system - Google Patents

Shielding system Download PDF

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Publication number
US1659542A
US1659542A US167020A US16702027A US1659542A US 1659542 A US1659542 A US 1659542A US 167020 A US167020 A US 167020A US 16702027 A US16702027 A US 16702027A US 1659542 A US1659542 A US 1659542A
Authority
US
United States
Prior art keywords
opening
circuit connections
compartments
cover member
connections
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 - Lifetime
Application number
US167020A
Other languages
English (en)
Inventor
Harry C Thompson
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to BE348688D priority Critical patent/BE348688A/xx
Priority to NL25402D priority patent/NL25402C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US167020A priority patent/US1659542A/en
Priority to DEJ33179D priority patent/DE524648C/de
Priority to FR649484D priority patent/FR649484A/fr
Priority to GB4131/28A priority patent/GB285044A/en
Application granted granted Critical
Publication of US1659542A publication Critical patent/US1659542A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05K9/0064—Earth or grounding circuit

Definitions

  • THOMPSON OF BCHENECTADY, NEW YORK, ASIG-NUB TO GENERAL ELEC- TBIC COMPANY, A CORPORATION OF NEW YORK.
  • My invention relates to means for neutralizing the electrical coupling which tends to exist between the input and output circuits of a space discharge device, and has for its principal object the provision of an improved shielding apparatus whereby both internal and external feed-back between the input and output circuits of such a device are prevented.
  • a further object is the provision of an improved arrangement for comat a constant potential with respect to pleting the connections of a space discharge device comprising a screen grid arranged to neutralize the capacity coupling between its anode and control grid.
  • Fig. 1 shows a transverse section taken on the line 1-1 of Fig. 2; and F i 3 shows a longitudinal section taken on t e line 2-2 of Fig. 2.
  • This apparatus comprises a receptacle 3 which encloses a plurality of space discharge devices 4 and 5 and is provided with partitions 6 and 7 whereby the input circuit connections and output circuit connections of each device are separated and screened from one another.
  • the input circuit connections of the device 4 are enclosed in a compartment 8; the output circuit connections of the device 4 and the input circuit connections of the device 5 are enclosed in a compartment 9; and the output circuit connections of the device 5 are enclosed in a compartment 10.
  • the output circuit of the device 4 is con led to the input circuit of the device 5 t rough means shown as a condenser 11, and that a resistor 12 is provided for maintaining the control grid potential of the device 5 at an average value required for satisfactory 0 eration.
  • Tuning of the input circuit of the device 4 is effected by means comprising a reactor 13. and a condenser 14.
  • Tuning of the output "circuits of the devices 4' and 5 is likewise efl'ected' respectively by a reactor 15 and condenser 16 and by a reactor 17 and a condenser 18.
  • the devices 4 and 5 each comprise a cathode 19 supplied with heating current from a source A through a resistor 20, an anode 21 arranged to be connected to the cathode 19 through a source B, a screen grid 22 connected to an intermediate terminal 23 of the source B, and a control grid 24.
  • the connections to the control grid 24 of device 4 are completed through-a contact member 25 and the connections to the control grid 24 of device 5 are completed through a contact member 26.
  • the contact member 25 is mounted on and electrically insulated from a movable shield member 27 and is arranged to contact with the control grid terminal 29 and a terminal 30 when the member 27 is in its illustrated position.
  • the partition 6 between the compartments 8 and 9 is slotted and that the edges of the slot are turned back to form grooves 31 adapted to receive inturned flanges formed on the edges of the shield member 27.
  • a similar joint is made between the edges of the partition 7 and a movable shield member 32 which surrounds the space discharge device 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Safety Valves (AREA)
US167020A 1927-02-08 1927-02-09 Shielding system Expired - Lifetime US1659542A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE348688D BE348688A (en)) 1927-02-09
NL25402D NL25402C (en)) 1927-02-09
US167020A US1659542A (en) 1927-02-09 1927-02-09 Shielding system
DEJ33179D DE524648C (de) 1927-02-08 1928-01-13 Schirmgitterroehrenempfangsapparat
FR649484D FR649484A (fr) 1927-02-08 1928-02-07 Perfectionnements aux moyens destinés à empêcher tout effet de rétroaction entre les circuits d'entrée et de sortie de tubes à décharge
GB4131/28A GB285044A (en) 1927-02-09 1928-02-09 Improvements in shielding systems for electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US167020A US1659542A (en) 1927-02-09 1927-02-09 Shielding system

Publications (1)

Publication Number Publication Date
US1659542A true US1659542A (en) 1928-02-14

Family

ID=22605612

Family Applications (1)

Application Number Title Priority Date Filing Date
US167020A Expired - Lifetime US1659542A (en) 1927-02-08 1927-02-09 Shielding system

Country Status (4)

Country Link
US (1) US1659542A (en))
BE (1) BE348688A (en))
GB (1) GB285044A (en))
NL (1) NL25402C (en))

Also Published As

Publication number Publication date
GB285044A (en) 1928-05-17
NL25402C (en))
BE348688A (en))

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