GB551664A - Improvements in or relating to gas-filled electric discharge tubes - Google Patents

Improvements in or relating to gas-filled electric discharge tubes

Info

Publication number
GB551664A
GB551664A GB10734/41A GB1073441A GB551664A GB 551664 A GB551664 A GB 551664A GB 10734/41 A GB10734/41 A GB 10734/41A GB 1073441 A GB1073441 A GB 1073441A GB 551664 A GB551664 A GB 551664A
Authority
GB
United Kingdom
Prior art keywords
tube
line
party
gas
ringer
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
GB10734/41A
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
Publication of GB551664A publication Critical patent/GB551664A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G31/00—Soilless cultivation, e.g. hydroponics
    • A01G31/02—Special apparatus therefor
    • A01G31/06—Hydroponic culture on racks or in stacked containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/30—Electromagnetic relays specially adapted for actuation by ac
    • H01H51/32—Frequency relays; Mechanically-tuned relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/40—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G31/00—Soilless cultivation, e.g. hydroponics
    • A01G2031/006—Soilless cultivation, e.g. hydroponics with means for recycling the nutritive solution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

551,664. Party-line systems. STANDARD TELEPHONES & CABLES, Ltd. Aug. 22, 1941, No. 10734. Convention date, Aug. 29, 1940. [Class 40 (iv)] [Also in Groups XL and XX] A party-line substation includes a gas-filled discharge tube TT having an electrode 4, Fig. 1, made as a vibratile magnetic reed, which, when a coil 7 is supplied with current at its natural frequency, vibrates with sufficient amplitude to allow a discharge between electrodes 4 and 5. A ringer R, Fig. 5, gravity switch GS. and tube TT are placed in series across a party line A, B. When current of the frequency appropriate to the tube TT is applied to the line. it passes through coil 7 and condenser C, causing the tube to break down and operate ringer R. When gravity switch GS is raised by removal of receiver, an operator can verify the identity of the answering station by again applying the ringing frequency, when tube TT will earth the B line if correct.
GB10734/41A 1940-08-29 1941-08-22 Improvements in or relating to gas-filled electric discharge tubes Expired GB551664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US354681A US2258437A (en) 1940-08-29 1940-08-29 Gas tube

Publications (1)

Publication Number Publication Date
GB551664A true GB551664A (en) 1943-03-04

Family

ID=23394465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10734/41A Expired GB551664A (en) 1940-08-29 1941-08-22 Improvements in or relating to gas-filled electric discharge tubes

Country Status (2)

Country Link
US (1) US2258437A (en)
GB (1) GB551664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171085B (en) * 1961-02-03 1964-05-27 Philips Nv Electromagnetic contact device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246259A (en) * 1962-05-09 1966-04-12 Vibrionics Res Co Electromechanical transducer and systems relating thereto
US3422311A (en) * 1964-12-09 1969-01-14 Vibrionics Research Co Electromechanical transducer
US11161147B2 (en) * 2018-02-08 2021-11-02 The Trustees Of Princeton University System and method for acoustic to electronic transduction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171085B (en) * 1961-02-03 1964-05-27 Philips Nv Electromagnetic contact device

Also Published As

Publication number Publication date
US2258437A (en) 1941-10-07

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