GB1160849A - Improvements in or relating to Indirectly Heated Dispenser Cathodes - Google Patents

Improvements in or relating to Indirectly Heated Dispenser Cathodes

Info

Publication number
GB1160849A
GB1160849A GB33804/68A GB3380468A GB1160849A GB 1160849 A GB1160849 A GB 1160849A GB 33804/68 A GB33804/68 A GB 33804/68A GB 3380468 A GB3380468 A GB 3380468A GB 1160849 A GB1160849 A GB 1160849A
Authority
GB
United Kingdom
Prior art keywords
transverse
attached
heater coil
flange
july
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
GB33804/68A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1160849A publication Critical patent/GB1160849A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Abstract

1,160,849. Thermionic cathode constructions. SIEMENS A.G. 16 July, 1968 [17 July, 1967], No. 33804/68. Heading H1D. An indirectly heated dispenser cathode comprises a self-supporting heater element in the form of an uninsulated cylindrical heater coil 6 arranged between two thick cylindrical metal casings 3, 5 of the same length, the inner casing 3 having a central passage which houses the emissive charge container 18 and having an external transverse flange 2 with an annular upstanding ridge 4 to which the porous emissive-substance carrier plate 1 is attached, and the outer casing 5 being attached to the transverse flange 2 opposite the upstanding ridge 4. Preferably, the topmost turn of the heater coil 6 is received by a clamping ring 22 located beneath flange 2 and heater coil 6 terminates in two connector pins 7 insulatingly secured in a base-plate 10 which is inserted in support cylinder 17 attached to the transverse flange 2. As shown, support cylinder 17, which also serves as a radiation shield, may have a number of transverse slots which act as a heat brake between the base plate 10 and casings 3, 5, and additional transverse radiation shield plates 11, 12, 13 may also be provided in the region of the slots. This construction enables the charge container 18, with castellated rim 19, to be inserted in position last, after all the other parts have been tested.
GB33804/68A 1967-07-17 1968-07-16 Improvements in or relating to Indirectly Heated Dispenser Cathodes Expired GB1160849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0110863 1967-07-17

Publications (1)

Publication Number Publication Date
GB1160849A true GB1160849A (en) 1969-08-06

Family

ID=7530545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33804/68A Expired GB1160849A (en) 1967-07-17 1968-07-16 Improvements in or relating to Indirectly Heated Dispenser Cathodes

Country Status (4)

Country Link
US (1) US3495122A (en)
DE (1) DE1614566B1 (en)
FR (1) FR1571932A (en)
GB (1) GB1160849A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671792A (en) * 1969-10-29 1972-06-20 Itt Fast warm-up indirectly heated cathode structure
KR0147542B1 (en) * 1989-12-31 1998-08-01 김정배 Impregnated cathode for electron tube
KR0161381B1 (en) * 1994-12-28 1998-12-01 윤종용 Straight line type cathode structure
KR100195167B1 (en) * 1994-12-29 1999-06-15 손욱 Cathode heated directly and the manufacturing method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL208455A (en) * 1954-06-29
US3299317A (en) * 1963-06-12 1967-01-17 Varian Associates Electron tube having a quick heating cathode with means to apply a variable voltage to the quick heating cathode
DE1223062B (en) * 1964-02-14 1966-08-18 Siemens Ag Storage cathode for electrical discharge vessels and process for their manufacture

Also Published As

Publication number Publication date
DE1614566B1 (en) 1970-11-05
FR1571932A (en) 1969-06-20
US3495122A (en) 1970-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee