US3727398A - Chronograph - Google Patents

Chronograph Download PDF

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Publication number
US3727398A
US3727398A US00256292A US3727398DA US3727398A US 3727398 A US3727398 A US 3727398A US 00256292 A US00256292 A US 00256292A US 3727398D A US3727398D A US 3727398DA US 3727398 A US3727398 A US 3727398A
Authority
US
United States
Prior art keywords
control member
column wheel
teeth
chronograph
pair
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 - Lifetime
Application number
US00256292A
Other languages
English (en)
Inventor
D Rochat
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.)
VALJOUX
Original Assignee
VALJOUX
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 VALJOUX filed Critical VALJOUX
Application granted granted Critical
Publication of US3727398A publication Critical patent/US3727398A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04F7/062—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 with reset mechanisms
    • 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
    • G04F7/065—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 with start-stop control arrangements
    • 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
    • G04F7/0857—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with single push-button or actuation member for start-stop and reset

Definitions

  • ABSTRACT A timepiece such as a tirnecounter or a chronograph comprising a column wheel, a control member permitting the column wheel to be driven step by step unidirectionally so that the successive operations of the control, member produce successively starting, stopping and setting to zero of the hand of the counter or of the chronograph, and which comprises a second control member permitting the column wheel to be driven reversely one step, so that the operation of the second control member, when the counter or chronograph is stopped, efiects its restarting.
  • This timepiece is characterized by the fact that the ratchet toothing of the column wheel with which the first control member cooperates for driving it step by step comprises a number of teeth which is a multiple of 5 three, each third tooth having its rear face conformed in such a way that the second control member, while acting on this rear face, produces the rearward movement of one step of the column wheel, while the two other teeth of each group of three teeth show a rear face conformed in such a way that the second control member bears thereon when it is operated, without producing any displacement of the column wheel.
  • the drawing shows, by way of example, one embodiment of the invention.
  • the sole FIGURE is a timecounter.
  • the timecounter represented comprises a column wheel constituted by a ratchet wheel provided with four columns 150. These columns control a lever 16 provided with a whip serving to stop and to drive the balance wheel of the movement of the counter and a hammer l7 acting on a heart piece 18 for resetting the hand of the counter to zero, which hand is not shown and is carried by a shaft 19.
  • the center of the arc-shaped surface 22 serves as a center of rotation of the lever, a beak 20b of which then cooperates with the ratchet wheel of the column wheel for rotating it step by step in the direction of the arrow 26, to produce successively starting, stopping and return to zero of the hand of the counter.
  • the ratchet wheel 15 has twelve teeth, that is to say a multiple of three, and each third tooth, designated by 15b, has a rear face 27 which, rather than being inclined upwardly from the base of the front face of the preceding tooth, as are the rear faces 28 of the two other teeth 150 of each group of three teeth, is substantially symmetrical with the front face 29 with respect to the axis of the tooth.
  • the lever 20 includes a second beak 200 which, when pressure is exerted at 30 on a second bent portion 20d of the lever, rotating it around the center of its bearing surface 23, cooperates with the rear face of the teeth of the ratchet wheel 15.
  • the beak 20c slides on the rear inclined face 28 of the tooth of the ratchet wheel 15 on which it bears without driving it.
  • a tooth 15b of the ratchet wheel 15 is situated opposite the beak 200 of the lever 20, when the counter is stopped before it has been returned to zero, the beak 20c acts on the rear face 27 of the tooth 15b, to produce the rearward rotation of one step of the column wheel in a direction opposite to that of arrow 26, thus restarting the counter.
  • a timepiece such as a timecounter or chronograph comprising, a column wheel, a control member permitting the column wheel to be driven step by step unidirectionally so that the successive operations of the control member roduce successively starting, stopping and setting 0 zero of the hand of the counter or of the chronograph, and a second control member permitting the column wheel to be driven reversely one step, so that the operation of the second control member, when the counter or chronograph is stopped effects its restarting, the column wheel being provided with a number of teeth which is a multiple of three, each third tooth having its rear face so conformed that the second control member, when it is operated, produces the reverse movement of one step of the column wheel, the other teeth of each group of three teeth presenting rear face so conformed that the control member bears thereon, when it is operated, without producing displacement of the column wheel.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
US00256292A 1971-11-15 1972-05-24 Chronograph Expired - Lifetime US3727398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1657471A CH546435A (enrdf_load_stackoverflow) 1971-11-15 1971-11-15

Publications (1)

Publication Number Publication Date
US3727398A true US3727398A (en) 1973-04-17

Family

ID=4418479

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256292A Expired - Lifetime US3727398A (en) 1971-11-15 1972-05-24 Chronograph

Country Status (4)

Country Link
US (1) US3727398A (enrdf_load_stackoverflow)
JP (1) JPS4862467A (enrdf_load_stackoverflow)
CH (2) CH546435A (enrdf_load_stackoverflow)
DE (1) DE2223404A1 (enrdf_load_stackoverflow)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512088A (en) * 1945-03-19 1950-06-20 Willi A Buchler Chronograph
CH279962A (fr) * 1949-11-26 1951-12-31 D Horlogerie Minerva Sport S A Compteur de temps.
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512088A (en) * 1945-03-19 1950-06-20 Willi A Buchler Chronograph
CH279962A (fr) * 1949-11-26 1951-12-31 D Horlogerie Minerva Sport S A Compteur de temps.
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter

Also Published As

Publication number Publication date
DE2223404A1 (de) 1973-05-24
CH1657471A4 (enrdf_load_stackoverflow) 1973-09-14
CH546435A (enrdf_load_stackoverflow) 1974-02-28
JPS4862467A (enrdf_load_stackoverflow) 1973-08-31

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