GB1144902A - Improvements in or relating to clock indexing mechanisms - Google Patents

Improvements in or relating to clock indexing mechanisms

Info

Publication number
GB1144902A
GB1144902A GB954565A GB954565A GB1144902A GB 1144902 A GB1144902 A GB 1144902A GB 954565 A GB954565 A GB 954565A GB 954565 A GB954565 A GB 954565A GB 1144902 A GB1144902 A GB 1144902A
Authority
GB
United Kingdom
Prior art keywords
wheel
shaft
fixed
pinion
worm
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
GB954565A
Inventor
John Henry Shelley
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB954565A priority Critical patent/GB1144902A/en
Publication of GB1144902A publication Critical patent/GB1144902A/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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
    • G04C3/061—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance the balance controlling contacts and mechanically driving the gear-train

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1,144,902. Electric clocks. SMITHS INDUSTRIES Ltd. March 17, 1966 [March 5, 1965], No.9545/65. Heading G3T. A clock indexing mechanism comprises a toothed index wheel 35 arranged for step by step rotation under the control of an oscillating indexing lever (31, Fig. 2 not shown), which is itself controlled by an oscillating balance wheel 17 through a step down transmission formed by gears 25, 27, 29. Mounted on the balance wheel 17 is an arm 19 and a coil 18 which sweeps through a gap 20 between poles 21 of a permanent magnet. The pinion 25 is fixed to the shaft 16 of the balance wheel and meshes with the gear-wheel 27. A pinion 29 fixed to the gear-wheel 27 engages a toothed segment 30 of the lever (31) which has pallets (33, 34) engaging the index wheel 35. The pallets impart a step by step rotation to the index wheel to which is fixed a worm gear 37 engaging a worm-wheel 38 mounted on a shaft (39). A worm gear 40 also mounted on the shaft (39) transmits the step by step rotation to a worm-wheel 41 fixed to an output shaft 42 which drives the minutes hand. Step down gearing 44 drives the hours hand shaft 43. In a second embodiment, the pinion on the balance wheel meshes directly with a toothed segment of the indexing lever and the index wheel is formed in two parts connected by a spring.
GB954565A 1965-03-05 1965-03-05 Improvements in or relating to clock indexing mechanisms Expired GB1144902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB954565A GB1144902A (en) 1965-03-05 1965-03-05 Improvements in or relating to clock indexing mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB954565A GB1144902A (en) 1965-03-05 1965-03-05 Improvements in or relating to clock indexing mechanisms

Publications (1)

Publication Number Publication Date
GB1144902A true GB1144902A (en) 1969-03-12

Family

ID=9874067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB954565A Expired GB1144902A (en) 1965-03-05 1965-03-05 Improvements in or relating to clock indexing mechanisms

Country Status (1)

Country Link
GB (1) GB1144902A (en)

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