GB487129A - Improvements in and relating to electric time-registering apparatus - Google Patents

Improvements in and relating to electric time-registering apparatus

Info

Publication number
GB487129A
GB487129A GB32779/37A GB3277937A GB487129A GB 487129 A GB487129 A GB 487129A GB 32779/37 A GB32779/37 A GB 32779/37A GB 3277937 A GB3277937 A GB 3277937A GB 487129 A GB487129 A GB 487129A
Authority
GB
United Kingdom
Prior art keywords
shaft
crown
crown wheel
nov
coils
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
GB32779/37A
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 Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB487129A publication Critical patent/GB487129A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/003—Apparatus for measuring unknown time intervals by electromechanical means using continuously running driving means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

487,129. Clocks; stop mechanism; clutches. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 27, 1937, No. 32779. Convention date, Nov. 27, 1936. [Class 139] [Also in Group XXIV] Electric time-registering apparatus comprises a rotatable and axially-slidable indicating shaft 6<1> arranged to be driven through a crown-wheel 13 from clockwork mechanism 1 and to be arrested in response to electromagnetic means comprising a pair of annular coils 19, 20 between which is arranged an armature disc 15 rigidly mounted on the shaft 6<1> and movable in response to selective energization of the coils to disengage the shaft and bring stop means 17 secured thereon into engagement with a fixed crown wheel 11, this latter and the crown wheel 13 being disposed concentrically within the annular coils 19 and 20 respectively. The clutch means 17, 18 comprise preferably resilient, radially disposed bars spaced so that at least one bar engages the crown wheel teeth in the coupling position. In a modification, the clutch device is arranged immediately behind the indicating pointer which can thereby be stopped while the rest of the mechanism continues to operate. Specification 420,419 is referred to.
GB32779/37A 1936-11-27 1937-11-27 Improvements in and relating to electric time-registering apparatus Expired GB487129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE487129X 1936-11-27

Publications (1)

Publication Number Publication Date
GB487129A true GB487129A (en) 1938-06-15

Family

ID=6543556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32779/37A Expired GB487129A (en) 1936-11-27 1937-11-27 Improvements in and relating to electric time-registering apparatus

Country Status (1)

Country Link
GB (1) GB487129A (en)

Similar Documents

Publication Publication Date Title
GB1069825A (en) Combined spring and friction clutch of the electrically actuated type
GB487129A (en) Improvements in and relating to electric time-registering apparatus
GB612320A (en) Improvements in or relating to electromagnetic clutches
US1963638A (en) Magnetic clutch
US2398015A (en) Visual indicating device
US2620872A (en) Expanded scale timer
US2377011A (en) Ammunition rounds indicator
US1960508A (en) Time-instrument resettingmechanism
US1895637A (en) Synchronous motor
GB533260A (en) Improvements relating to electro-magnetic clutching means
US2254912A (en) Watt-hour demand meter
US2488824A (en) Current interruption indicating means for electric clocks
GB399939A (en) Improvements relating to magnetic clutches
US2566940A (en) Secondary clock synchronizing mechanism
US1927895A (en) Electric clock
GB288285A (en) Improvements relating to electric speed indicating apparatus
GB1038927A (en) A clutch mechanism
GB1267579A (en) Synchronizing device
GB558322A (en) An improved device for the release of clockwork and like intermittently released driving mechanism
GB607678A (en) Improvements in and relating to dynamo-electric machine drives
GB790097A (en) Improvements in or relating to electro-magnetic torque transmission devices
GB384681A (en) Improvements in and relating to synchronous electric motors
GB573942A (en) Watch movement
GB478702A (en) Improvements in and relating to current impulse transmitters
GB509056A (en) Improvements in electro-magnetic devices