GB580967A - Improvements in or relating to indicator calling installations - Google Patents

Improvements in or relating to indicator calling installations

Info

Publication number
GB580967A
GB580967A GB15488/43A GB1548843A GB580967A GB 580967 A GB580967 A GB 580967A GB 15488/43 A GB15488/43 A GB 15488/43A GB 1548843 A GB1548843 A GB 1548843A GB 580967 A GB580967 A GB 580967A
Authority
GB
United Kingdom
Prior art keywords
pointers
numerals
marking
dial
bears
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
GB15488/43A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr 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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB580967A publication Critical patent/GB580967A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

580,967. Electric signalling systems. LANDIS & GYR SOC. ANON. Sept. 21, 1943, No'. 15488. Convention date, Oct. 31, 1942. [Class 40 (i)] In an installation comprising a number of indicators disposed at different points for summoning selected persons, each indicator is provided with two or more pointers 2, 3 which have their driving shafts one within the other and are individually driven by:electric impulses. As shown in Fig. 1, in which the dial bears a single ring of numerals, one of the pointers is longer than the other. The pointers are driven by separate magnets 6 through pawl-andratchet mechanism. A screen may be provided for marking the pointers in their normal position. An inner ring of Roman numerals may be used for marking the position of the shorter pointer. Alternatively, each pointer may move over one half of the dial, which bears a double series of numerals, as in Fig. 4. Instead of numerals, other signs or colours may be employed.
GB15488/43A 1942-10-31 1943-09-21 Improvements in or relating to indicator calling installations Expired GB580967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH580967X 1942-10-31

Publications (1)

Publication Number Publication Date
GB580967A true GB580967A (en) 1946-09-26

Family

ID=4521501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15488/43A Expired GB580967A (en) 1942-10-31 1943-09-21 Improvements in or relating to indicator calling installations

Country Status (1)

Country Link
GB (1) GB580967A (en)

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