GB1397667A - Electric clocks - Google Patents

Electric clocks

Info

Publication number
GB1397667A
GB1397667A GB843173A GB843173A GB1397667A GB 1397667 A GB1397667 A GB 1397667A GB 843173 A GB843173 A GB 843173A GB 843173 A GB843173 A GB 843173A GB 1397667 A GB1397667 A GB 1397667A
Authority
GB
United Kingdom
Prior art keywords
switch
motor
drums
magnet
drum
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
GB843173A
Other languages
English (en)
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1397667A publication Critical patent/GB1397667A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/0075—Indicating the time optically by electric means by drums or drum-like devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Stopping Of Electric Motors (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
GB843173A 1972-02-26 1973-02-21 Electric clocks Expired GB1397667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972023729U JPS48100170U (enrdf_load_stackoverflow) 1972-02-26 1972-02-26

Publications (1)

Publication Number Publication Date
GB1397667A true GB1397667A (en) 1975-06-18

Family

ID=12118390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB843173A Expired GB1397667A (en) 1972-02-26 1973-02-21 Electric clocks

Country Status (4)

Country Link
US (1) US3808791A (enrdf_load_stackoverflow)
JP (1) JPS48100170U (enrdf_load_stackoverflow)
CA (1) CA968167A (enrdf_load_stackoverflow)
GB (1) GB1397667A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336402Y2 (enrdf_load_stackoverflow) * 1974-01-17 1978-09-05
US6275449B1 (en) * 1998-08-07 2001-08-14 Richard Wang World clock with synchronous display

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134220A (en) * 1961-05-16 1964-05-26 Dichl Electric clock
US3451210A (en) * 1966-07-01 1969-06-24 Benrus Corp System for maintaining oscillations in an electric timing mechanism having an oscillatory element
US3568430A (en) * 1968-07-11 1971-03-09 Hamilton Watch Co Resistance bridge controlled timekeeping device
US3601975A (en) * 1969-04-23 1971-08-31 Timex Corp Horological movement utilizing a radioactivity detector and source
US3643419A (en) * 1969-07-14 1972-02-22 California Inst Of Techn Apparatus for fine adjustment of signal frequency

Also Published As

Publication number Publication date
US3808791A (en) 1974-05-07
JPS48100170U (enrdf_load_stackoverflow) 1973-11-26
CA968167A (en) 1975-05-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee