US3818689A - Digital display mechanism for a time-keeper - Google Patents

Digital display mechanism for a time-keeper Download PDF

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Publication number
US3818689A
US3818689A US00416837A US41683773A US3818689A US 3818689 A US3818689 A US 3818689A US 00416837 A US00416837 A US 00416837A US 41683773 A US41683773 A US 41683773A US 3818689 A US3818689 A US 3818689A
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US
United States
Prior art keywords
tens
disc
units
star wheel
lever
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
US00416837A
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English (en)
Inventor
J Muller
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.)
EBAUCHES TAVANNES SA
Original Assignee
EBAUCHES TAVANNES SA
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 EBAUCHES TAVANNES SA filed Critical EBAUCHES TAVANNES SA
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Publication of US3818689A publication Critical patent/US3818689A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/20—Indicating by numbered bands, drums, discs, or sheets
    • G04B19/202—Indicating by numbered bands, drums, discs, or sheets by means of turning discs

Definitions

  • the invention concerns a click mechanism for a clock or calendar, having two indicating or number discs but only one click or detent spring, thus reducing the friction in, and the driving force required by, the mechanism.
  • the units disc has a click wheel and spring, and is driven step-by-step by known means. When the figure 0 enters a display opening, the units disc turns a spur wheel which drives a second spur wheel attached to the tens disc, through a limited angular distance. The drive is completed by a lever driven by the completion of the step of the units disc, the lever locking the tens disc until the next time the disc is to be stepped.
  • two discs are provided, one indicating tens of minutes and one units; these discs are placed concentrically with respect to one other, and both are provided with a click as detent spring, which introduce fairly large friction forces in the movement.
  • the object of the present invention is to provide a digital display mechanism with two discs but only one click element, thus reducing friction forces and simplifying the construction.
  • a digital display mechanism for a time-keeper comprising a units disc, at tens disc placed concentrically therewith, said units disc having a finger initially driving a wheel drivingly co-operating with a tens star wheel, and a lever having inclined faces co-operating with said star wheel to effect a final driving action on said tens star wheel after the action of said finger, under the control of said units disc.
  • FIG. 1 is a plan view of a digital display mechanism before rotation of the tens disc
  • FIG. 2 is a plan view showing a digital display mechanism during the operation of rotation of the tens disc
  • FIG. 3 is a plan view, similar to FIG. 1, after rotation of the tens disc, and
  • FIG. 4 is a cross-section of the digital display mechanism.
  • the mechanism comprises a units disc 1 provided with a locking device 2 including a star wheel 3 having teeth, integrally mounted on the units disc I.
  • the wheel 3 is positioned by means of a click spring or detent 4.
  • the units disc 1 pivots freely on a ring 7 turned in a bottom plate 8, and provided with a finger 9 which cooperates with a driving pinion I0 freely mounted on a shoulder 11 of a headed pin 12 pressed into a hole 13 in the bottom plate 8.
  • the pin 11 also carries a freely pivoted lever 14 with inclined surfaces 15 and 16 and a nose l7 able to penetrate into a notch 19 machined on the inner face of the units disc 1.
  • the notch 19 has an entry slope 20 and a retaining edge 21.
  • the pinion l0 co-operates with a tens star wheel 24 with six teeth which freely pivots on a collet 25 fixed to the bottom plate 8.
  • the tens star wheel 24 presents on one of its lateral sides a counter-sunk portion receiving a tens disc 26 placed concentrically with respect to the units disc 1.
  • the tens star wheel 24 is normally held stationary by the inclined surfaces 15 and 16 of lever 14 which protrude between the flanks 28 and 29 of teeth 31 and 31 respectively of the star wheel 24, the lever being held by the nose l7'which normally abuts against the inner surface 30, when the units disc I is in rotation.
  • the tens star wheel 24 is maintained in place by means of a fixing screw 32.
  • the units disc is positioned 2 in its axial direction by the ring 7 and by a plate 33 fixed to the plate 8 by means of a screw 34.
  • the units disc 1 is numbered 0 to 9 and is entrained step-by-step one per minute by known means (not described), the appropriate number being presented in a window 37 of a casing 38.
  • the units disc 1 is caused by contact with the finger 9 to operate the intermediate pinion 10; however, as the notch 19 does not yet correspond with the position of the nose 17, the inclined planes l5 and 16 hold the tens star wheel 24 preventing the changing of the tens digit.
  • a digital display mechanism for a time-keeper comprising a units disc, a tens disc placed concentrically therewith, said units disc having a finger initially driving a wheel drivingly co-operating with a tens star wheel, and a lever having inclined faces co-operating with said star wheel to effect a final driving action on said tens star wheel after the action of said finger, under the control of said units disc.
  • a mechanism as recited in claim 1 characterized in that said lever is provided with a nose which abuts against the inner periphery of said units disc during the display of the units digits 1 to 9, thus locking said tens star wheel by means of said inclined faces.
  • a mechanism as recited in claim 1 characterized in that said lever nose is adapted to enter a notch which during rotation of said units disc causes said lever to exert a turning movement on said tens star wheel by the means of one of said inclined faces.
  • a mechanism as recited in claim 3 characterized in that said finger effects a couple on said wheel which co-operates with said tens star wheel to push back said lever by means of an inclined face of said notch.
  • said tens disc indicates tens of minutes and said units disc indicates individual minutes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US00416837A 1972-12-06 1973-11-19 Digital display mechanism for a time-keeper Expired - Lifetime US3818689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1774272A CH573616B5 (it) 1972-12-06 1972-12-06

Publications (1)

Publication Number Publication Date
US3818689A true US3818689A (en) 1974-06-25

Family

ID=4427755

Family Applications (1)

Application Number Title Priority Date Filing Date
US00416837A Expired - Lifetime US3818689A (en) 1972-12-06 1973-11-19 Digital display mechanism for a time-keeper

Country Status (4)

Country Link
US (1) US3818689A (it)
JP (1) JPS5521317B2 (it)
CH (2) CH1774272A4 (it)
DE (1) DE2357690C3 (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134751A (ja) * 1974-09-19 1976-03-24 Seikosha Kk Kuritsukukiko
US20050286348A1 (en) * 2004-06-28 2005-12-29 De Grisogono Large date display device
US20090139516A1 (en) * 2004-02-16 2009-06-04 Glaxo Group Limited Counter for use with a medicament dispenser
US20110090768A1 (en) * 2009-04-30 2011-04-21 Lange Uhren Gmbh Watch
EP3459578B1 (en) 2003-07-02 2021-03-03 Pfizer Limited Dispensing device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184786U (it) * 1984-11-05 1986-06-04
JPS61152089U (it) * 1985-03-06 1986-09-19
JPS6294178U (it) * 1985-11-28 1987-06-16
DE102005010602B4 (de) * 2005-03-06 2006-12-07 Mühle-Glashütte GmbH Nautische Instrumente & Feinmechanik Datumsanzeige für eine Uhr
FR3070508B1 (fr) * 2017-08-23 2019-09-06 Abmi Sud Est Mecanisme d'horlogerie et montre associee
NO20211186A1 (en) 2021-10-04 2023-04-05 Maturitas As Wristwatch with an improved date wheel system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579166A (en) * 1944-11-22 1951-12-18 Casco Products Corp Electric alarm clock
FR1186707A (fr) * 1957-06-13 1959-08-31 Pièce d'horlogerie
US2976672A (en) * 1955-10-21 1961-03-28 Geneva Sport Watch Ltd Timepiece with date indicator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4525373Y1 (it) * 1967-03-22 1970-10-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579166A (en) * 1944-11-22 1951-12-18 Casco Products Corp Electric alarm clock
US2976672A (en) * 1955-10-21 1961-03-28 Geneva Sport Watch Ltd Timepiece with date indicator
FR1186707A (fr) * 1957-06-13 1959-08-31 Pièce d'horlogerie

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134751A (ja) * 1974-09-19 1976-03-24 Seikosha Kk Kuritsukukiko
JPS557193B2 (it) * 1974-09-19 1980-02-22
EP3459578B1 (en) 2003-07-02 2021-03-03 Pfizer Limited Dispensing device
US11116917B2 (en) 2003-07-02 2021-09-14 Pfizer Limited Dispensing device
US20090139516A1 (en) * 2004-02-16 2009-06-04 Glaxo Group Limited Counter for use with a medicament dispenser
US8113199B2 (en) 2004-02-16 2012-02-14 Glaxo Group Limited Counter for use with a medicament dispenser
US20050286348A1 (en) * 2004-06-28 2005-12-29 De Grisogono Large date display device
US7133328B2 (en) 2004-06-28 2006-11-07 De Grisogono Large date display device
US20110090768A1 (en) * 2009-04-30 2011-04-21 Lange Uhren Gmbh Watch
US8406087B2 (en) 2009-04-30 2013-03-26 Jens Schneider Watch

Also Published As

Publication number Publication date
DE2357690C3 (de) 1975-08-07
DE2357690B2 (de) 1975-01-02
CH1774272A4 (it) 1975-09-15
DE2357690A1 (de) 1974-06-20
JPS4990567A (it) 1974-08-29
CH573616B5 (it) 1976-03-15
JPS5521317B2 (it) 1980-06-09

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