GB551664A - Improvements in or relating to gas-filled electric discharge tubes - Google Patents
Improvements in or relating to gas-filled electric discharge tubesInfo
- 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
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)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Devices For Supply Of Signal Current (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.
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)
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)
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 |
-
1940
- 1940-08-29 US US354681A patent/US2258437A/en not_active Expired - Lifetime
-
1941
- 1941-08-22 GB GB10734/41A patent/GB551664A/en not_active Expired
Cited By (1)
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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