GB465762A - Improvements in and relating to electric discharge devices - Google Patents

Improvements in and relating to electric discharge devices

Info

Publication number
GB465762A
GB465762A GB12802/36A GB1280236A GB465762A GB 465762 A GB465762 A GB 465762A GB 12802/36 A GB12802/36 A GB 12802/36A GB 1280236 A GB1280236 A GB 1280236A GB 465762 A GB465762 A GB 465762A
Authority
GB
United Kingdom
Prior art keywords
conductor
pool
starting
tube
arc
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
GB12802/36A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB465762A publication Critical patent/GB465762A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
    • H01J13/02—Details
    • H01J13/34—Igniting arrangements
    • H01J13/36—Igniting arrangements having resistive or capacitative igniter
    • H01J13/38—Igniting arrangements having resistive or capacitative igniter having resistive igniter only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/18—Switches having at least one liquid contact with level of surface of contact liquid displaced by non-electrical contact-making plunger

Landscapes

  • Discharge Lamp (AREA)
  • Spark Plugs (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

465,762. Arc - - discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. May 6, 1936, No. 12802. Convention date, May 11, 1935. [Class 39 (i)] To maintain constant the ignition point in each cycle of the alternating potential applied to an arc-discharge tube, the starting electrode, which projects into the cathode pool, is so formed that a change in resistance of the starting-current circuit due to variations in the level of the pool is compensated for by a change in the diameter of the line of contact with the surface of the pool. The starting electrode 10, which may have the shape shown in Fig. 2, and may consist of tungsten or silica carbide mixed with clay, is held in a member 16 swaged to the conductor 11. A lateral stem 3 supports the conductor 11 which is partly screened by a glass tube 12. The tube is adapted to supply rectified current to a load 19 such as a spot-welding device and the starting circuit includes a resistance 22 and a thermionic or oxide rectifier 23. The anode 7 consists of graphite or molybdenum and the conductor 5 is secured to the device through a glass to metal seal 6. A mercury or gallium cathode may be used.
GB12802/36A 1935-05-11 1936-05-06 Improvements in and relating to electric discharge devices Expired GB465762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20899A US2064477A (en) 1935-05-11 1935-05-11 Electric switch

Publications (1)

Publication Number Publication Date
GB465762A true GB465762A (en) 1937-05-14

Family

ID=21801179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12802/36A Expired GB465762A (en) 1935-05-11 1936-05-06 Improvements in and relating to electric discharge devices

Country Status (3)

Country Link
US (1) US2064477A (en)
DE (1) DE715946C (en)
GB (1) GB465762A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890394C (en) * 1944-07-08 1953-09-17 Philips Nv Electric discharge tubes with a mercury cathode and a further quantity of mercury, for example serving as an anode
US2485024A (en) * 1945-03-21 1949-10-18 Amalgamated Wireless Australas Electromagnetically operated vacuum sealed relay
US2563831A (en) * 1945-11-07 1951-08-14 Monitor Controller Co Vacuum relay
DE953187C (en) * 1954-06-29 1956-11-29 Siemens Ag Device for the operation of single-anode discharge vessels with permanent excitation
DE1201496B (en) * 1962-08-11 1965-09-23 Siemens Ag Operating circuit for ignition pin controlled converter vessels in anode ignition circuit

Also Published As

Publication number Publication date
US2064477A (en) 1936-12-15
DE715946C (en) 1942-01-09

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