FR781921A - Mercury switch, particularly applicable to signals for level crossings of safety devices for railways - Google Patents

Mercury switch, particularly applicable to signals for level crossings of safety devices for railways

Info

Publication number
FR781921A
FR781921A FR781921DA FR781921A FR 781921 A FR781921 A FR 781921A FR 781921D A FR781921D A FR 781921DA FR 781921 A FR781921 A FR 781921A
Authority
FR
France
Prior art keywords
railways
signals
particularly applicable
safety devices
mercury switch
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
Other languages
French (fr)
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.)
Vereinigte Eisenbahn Signalwerke GmbH
Original Assignee
Vereinigte Eisenbahn Signalwerke GmbH
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 Vereinigte Eisenbahn Signalwerke GmbH filed Critical Vereinigte Eisenbahn Signalwerke GmbH
Application granted granted Critical
Publication of FR781921A publication Critical patent/FR781921A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/28—Switches having at least one liquid contact with level of surface of contact liquid displaced by fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
FR781921D 1934-03-08 1934-11-27 Mercury switch, particularly applicable to signals for level crossings of safety devices for railways Expired FR781921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE781921X 1934-03-08

Publications (1)

Publication Number Publication Date
FR781921A true FR781921A (en) 1935-05-24

Family

ID=6692746

Family Applications (1)

Application Number Title Priority Date Filing Date
FR781921D Expired FR781921A (en) 1934-03-08 1934-11-27 Mercury switch, particularly applicable to signals for level crossings of safety devices for railways

Country Status (1)

Country Link
FR (1) FR781921A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6451389B1 (en) 1999-04-17 2002-09-17 Advanced Energy Industries, Inc. Method for deposition of diamond like carbon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6451389B1 (en) 1999-04-17 2002-09-17 Advanced Energy Industries, Inc. Method for deposition of diamond like carbon
US6818257B2 (en) 1999-04-17 2004-11-16 Advanced Energy Industries, Inc. Method of providing a material processing ion beam

Similar Documents

Publication Publication Date Title
FR781921A (en) Mercury switch, particularly applicable to signals for level crossings of safety devices for railways
FR793153A (en) Pneumatic switch for railway signals or barriers
FR835052A (en) Improvements to signaling devices for railways
FR808553A (en) Improvements to signaling devices for railways
FR781579A (en) Device for the connection of conductors to railway tracks
FR610070A (en) Improvements to safety devices for railways, in particular signaling devices
FR801917A (en) Improvements to light signal devices, in particular for railways
FR825309A (en) Improvements to railway safety devices
FR805316A (en) Improvements to signaling systems for railways
FR790780A (en) Electrical safety installation for railway level crossings
FR44632E (en) Improvements to signaling devices, more particularly for railways
FR797890A (en) Improvements to railway safety devices, such as points, signals or barriers
FR771476A (en) Improvements to signaling systems for railways
FR781920A (en) Mercury switch, applicable in particular to level crossing signals in railway signaling systems
FR786475A (en) One-piece anti-railway device for railway tracks
FR719534A (en) Improvements to signaling devices for railways
FR46110E (en) Signaling device for railways
FR45837E (en) Crocodile for signaling railway tracks
FR788804A (en) Crocodile for signaling railway tracks
FR776927A (en) Signaling for railway tracks
FR621455A (en) Improvements to signaling systems for railways
DK51571C (en) Signal system for railway crossings.
FR764690A (en) Improvements to signaling devices more particularly for railways
FR829260A (en) Signaling pedal for railway tracks
FR779963A (en) Railway signaling system for level crossings