GB501391A - Improvements in and relating to devices for closing an electric circuit by means of rails - Google Patents

Improvements in and relating to devices for closing an electric circuit by means of rails

Info

Publication number
GB501391A
GB501391A GB21782/38A GB2178238A GB501391A GB 501391 A GB501391 A GB 501391A GB 21782/38 A GB21782/38 A GB 21782/38A GB 2178238 A GB2178238 A GB 2178238A GB 501391 A GB501391 A GB 501391A
Authority
GB
United Kingdom
Prior art keywords
mercury
tube
pressure
rails
relating
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
GB21782/38A
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.)
Felten and Guilleaume Carlswerk AG
Original Assignee
Felten and Guilleaume Carlswerk 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 Felten and Guilleaume Carlswerk AG filed Critical Felten and Guilleaume Carlswerk AG
Publication of GB501391A publication Critical patent/GB501391A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/04—Electric devices associated with track, e.g. rail contacts mechanically actuated by a part of the vehicle
    • B61L1/045—Electric devices associated with track, e.g. rail contacts mechanically actuated by a part of the vehicle actuated by fluid-pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

501,391. Mercury switches. FELTEN & GUILLEAUME CARLSWERK AKT.-GES. July 22, 1938, No. 21782. Convention date, July 23, 1937. [Class 38 (v)] Depression of a rail 1 by passage of a railway vehicle depresses a diaphragm 2 to increase the pressure in a tube 5 and decrease the pressure in a tube 6 and so move a mercury column 7 to connect a contact 9 with a contact 10. On return of the diaphragm 2, the mercury falls back until its surface reaches the end of a nozzle 14 on the end of tube 5. The opening of the nozzle is made so small that mercury does not enter it so that further return of the mercury to open the circuit is delayed until pressure above the columns is equalized through a porous body 12.
GB21782/38A 1937-07-23 1938-07-22 Improvements in and relating to devices for closing an electric circuit by means of rails Expired GB501391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE501391X 1937-07-23

Publications (1)

Publication Number Publication Date
GB501391A true GB501391A (en) 1939-02-27

Family

ID=6545756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21782/38A Expired GB501391A (en) 1937-07-23 1938-07-22 Improvements in and relating to devices for closing an electric circuit by means of rails

Country Status (1)

Country Link
GB (1) GB501391A (en)

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