GB491442A - Improvements in electric clocks - Google Patents

Improvements in electric clocks

Info

Publication number
GB491442A
GB491442A GB240137A GB240137A GB491442A GB 491442 A GB491442 A GB 491442A GB 240137 A GB240137 A GB 240137A GB 240137 A GB240137 A GB 240137A GB 491442 A GB491442 A GB 491442A
Authority
GB
United Kingdom
Prior art keywords
electromagnet
clock
balance
armature
contacts
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
GB240137A
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.)
BRITISH VACUUM CLEANER AND ENG
Original Assignee
BRITISH VACUUM CLEANER AND ENG
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 BRITISH VACUUM CLEANER AND ENG filed Critical BRITISH VACUUM CLEANER AND ENG
Priority to GB240137A priority Critical patent/GB491442A/en
Publication of GB491442A publication Critical patent/GB491442A/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
    • G04C3/063—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, the balance driving electro-magnet simultaneously driving the gear-train

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

491,442. Electric clocks. LANFRANCONI, F. A., and BRITISH VACUUM CLEANER & ENGINEERING CO., Ltd. Jan. 27, 1937, Nos. 2401 and 16476. [Class 139] In an electric clock of the type in which movement of the balance is maintained by an electromagnet energized intermittently under the control of a contact device actuated bv the balance, the electromagnet is arranged to drive the clock train through the medium of a separate oscillating member mechanically independent of the balance. An electromagnet 8 has two pairs of polepieces 10-13 and is mounted between two independent, hairspring-controlled, armatures 15, 27. The armature 15, by causing the bridging of two contacts 20 at each oscillation, gives intermittent energization to the electromagnet 8, while the armature 27, oscillating in sympathy with the magnetic impulses, actuates the clock train through a step-by-step mechanism. The hair-spring 16 tends to cause the contacts to be closed and, consequently, the clock is self-starting. Specification 491,487 is referred to.
GB240137A 1937-01-27 1937-01-27 Improvements in electric clocks Expired GB491442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB240137A GB491442A (en) 1937-01-27 1937-01-27 Improvements in electric clocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB240137A GB491442A (en) 1937-01-27 1937-01-27 Improvements in electric clocks

Publications (1)

Publication Number Publication Date
GB491442A true GB491442A (en) 1938-08-29

Family

ID=9738899

Family Applications (1)

Application Number Title Priority Date Filing Date
GB240137A Expired GB491442A (en) 1937-01-27 1937-01-27 Improvements in electric clocks

Country Status (1)

Country Link
GB (1) GB491442A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516720A (en) * 1945-11-26 1950-07-25 Bendix Aviat Corp Electric clock
US2642714A (en) * 1947-12-23 1953-06-23 Gen Motors Corp Electric clock
US2662365A (en) * 1951-10-13 1953-12-15 Stewart Warner Corp Hour meter
US2763121A (en) * 1950-06-01 1956-09-18 Ayres Clock Company Inc Horological mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516720A (en) * 1945-11-26 1950-07-25 Bendix Aviat Corp Electric clock
US2642714A (en) * 1947-12-23 1953-06-23 Gen Motors Corp Electric clock
US2763121A (en) * 1950-06-01 1956-09-18 Ayres Clock Company Inc Horological mechanism
US2662365A (en) * 1951-10-13 1953-12-15 Stewart Warner Corp Hour meter

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