GB994871A - Improvements in or relating to stop watches - Google Patents

Improvements in or relating to stop watches

Info

Publication number
GB994871A
GB994871A GB32175/60A GB3217560A GB994871A GB 994871 A GB994871 A GB 994871A GB 32175/60 A GB32175/60 A GB 32175/60A GB 3217560 A GB3217560 A GB 3217560A GB 994871 A GB994871 A GB 994871A
Authority
GB
United Kingdom
Prior art keywords
balance
pin
seconds hand
turreted
arrest
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
GB32175/60A
Inventor
James George Habgood
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.)
S Smith and Sons Ltd
S Smith and Sons England Ltd
Original Assignee
S Smith and Sons Ltd
S Smith and Sons England 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 S Smith and Sons Ltd, S Smith and Sons England Ltd filed Critical S Smith and Sons Ltd
Priority to GB32175/60A priority Critical patent/GB994871A/en
Publication of GB994871A publication Critical patent/GB994871A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/06—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0847—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

994,871. Watches. S. SMITH & SONS (ENGLAND) Ltd. Sept. 19,1961 [Sept. 19,1960], No.32175/60, Heading G3T. A stop watch of the kind in which three successive depressions and releases of a control button 29 step-on a cam device in the form of a turreted ratchet wheel 26, so that (a) the first step actuates a follower 22 on a lever 20 to carry a resilient stop pin 19 on the lever, which pin is initially in contact with the balance at a position A, along with the balance to start it before moving clear of it to a position B, whereby the seconds hand is started; (b) the second step actuates the follower so that it moves the stop pin from position B back into contact with the balance at position A to arrest it along with the seconds hand; and (c) the third step (by means not shown) releases the seconds hand for return to zero by a spring, is characterized by guard means 17 which prevents the pin 19 from re-engaging the balance until step (b) is substantially ended. The invention avoids the possibility of fictitious low readings being obtained owing to an arrest of the balance by a partial depression only if the button 29 during a timing operation. As shown, the guard 17 is constituted by an upstanding rib on an arm 16 carried from a bridge 13 which supports the balance arbor. A spring biased detent 35 locates the turreted ratchet wheel 26 in the initial position, this detent being moved out of the space between the turret cam projections 25 to engage the projectors frictionally. Reverse movement of the ratchet is prevented by a pawl 31.
GB32175/60A 1960-09-19 1960-09-19 Improvements in or relating to stop watches Expired GB994871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32175/60A GB994871A (en) 1960-09-19 1960-09-19 Improvements in or relating to stop watches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32175/60A GB994871A (en) 1960-09-19 1960-09-19 Improvements in or relating to stop watches

Publications (1)

Publication Number Publication Date
GB994871A true GB994871A (en) 1965-06-10

Family

ID=10334465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32175/60A Expired GB994871A (en) 1960-09-19 1960-09-19 Improvements in or relating to stop watches

Country Status (1)

Country Link
GB (1) GB994871A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430434A (en) * 1966-06-14 1969-03-04 Lemania Lugrin Horlogerie Zero reset mechanism for timepieces measuring time intervals
US3712036A (en) * 1969-10-03 1973-01-23 Daini Seikosha Koto Ku Tokyo K Cam wheel mechanism for watches
CH700046A1 (en) * 2008-12-05 2010-06-15 Christophe Claret S A Control mechanism for stopping and restarting balance of timepiece movement, has lever comprising portion that passes from end position to another end position by being moved into plane for attaining latter end position

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430434A (en) * 1966-06-14 1969-03-04 Lemania Lugrin Horlogerie Zero reset mechanism for timepieces measuring time intervals
US3712036A (en) * 1969-10-03 1973-01-23 Daini Seikosha Koto Ku Tokyo K Cam wheel mechanism for watches
CH700046A1 (en) * 2008-12-05 2010-06-15 Christophe Claret S A Control mechanism for stopping and restarting balance of timepiece movement, has lever comprising portion that passes from end position to another end position by being moved into plane for attaining latter end position

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