GB903721A - Electro-magnetically controlled visual indicators - Google Patents

Electro-magnetically controlled visual indicators

Info

Publication number
GB903721A
GB903721A GB3077658A GB3077658A GB903721A GB 903721 A GB903721 A GB 903721A GB 3077658 A GB3077658 A GB 3077658A GB 3077658 A GB3077658 A GB 3077658A GB 903721 A GB903721 A GB 903721A
Authority
GB
United Kingdom
Prior art keywords
spring
switch
disc
electromagnet
change
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
GB3077658A
Inventor
Harry Stanley Lewis
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.)
Chamberlain and Hookham Ltd
Original Assignee
Chamberlain and Hookham 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 Chamberlain and Hookham Ltd filed Critical Chamberlain and Hookham Ltd
Priority to GB3077658A priority Critical patent/GB903721A/en
Publication of GB903721A publication Critical patent/GB903721A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/28—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Switches With Compound Operations (AREA)

Abstract

903,721. Visible signalling-apparatus. CHAMBERLAIN & HOOKHAM Ltd. Sept. 21, 1959 [Sept. 26, 1958], No. 30776/58. Class 118. A semaphore indicator, for indicating the condition of a remotelydisposed switch, comprises a disc which is angularly movable between two positions by electromagnetic means, the electromagnetic means being energized only momentarily to effect each change of position of the disc. An electromagnet 11 is connected to a source of electric current through a changeover switch 21 and also through a second change-over switch (not shown), the latter being actuated in synchronism with the switch whose condition is to be indicated. The circuit is arranged so that actuation of the second change-over switch will cause energization of the electromagnet thereby attracting a spring-loaded armature 12 to operate the switch 21 which then breaks the circuit and allows the spring- loaded armature 12 to return to its original position, the two change-over switches thereupon forming an alternative circuit ready for the next energization of the electromagnet. The armature 12 of electromagnet 11 is connected to a spring-loaded pawl 14 operating a ratchet 16 which rotates upon a spindle 17 suspended between two plates 18 upstanding from the base of channel 7. At each end of the spindle 17 are square-shaped cams 19, 20, cam 19 being connected by a spring leaf 22 to changeover switch 21 and cam 20 to a spring-loaded lever 23 connected via pivoted lever 26, eccentric pin 28 and spindle 29 to the indicator disc 24 such that movement of the ratchet changes both the position of the switch 21 and the position of the disc. It is arranged so that if in either of the two positions angular movement is imparted to the disc to move it to the alternative position, other than by actuation of the cam 20, then the disc returns to its correct position as soon as it is released under the influence of either spring 27 or the two levers 23, 26 and spring 25. Specification 903,723 is referred to.
GB3077658A 1958-09-26 1958-09-26 Electro-magnetically controlled visual indicators Expired GB903721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3077658A GB903721A (en) 1958-09-26 1958-09-26 Electro-magnetically controlled visual indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3077658A GB903721A (en) 1958-09-26 1958-09-26 Electro-magnetically controlled visual indicators

Publications (1)

Publication Number Publication Date
GB903721A true GB903721A (en) 1962-08-15

Family

ID=10312967

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3077658A Expired GB903721A (en) 1958-09-26 1958-09-26 Electro-magnetically controlled visual indicators

Country Status (1)

Country Link
GB (1) GB903721A (en)

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