US3854280A - Mechanical digital watch - Google Patents

Mechanical digital watch Download PDF

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Publication number
US3854280A
US3854280A US00477731A US47773174A US3854280A US 3854280 A US3854280 A US 3854280A US 00477731 A US00477731 A US 00477731A US 47773174 A US47773174 A US 47773174A US 3854280 A US3854280 A US 3854280A
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US
United States
Prior art keywords
hour
pinion
disc
drive
window
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
US00477731A
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English (en)
Inventor
P Wuthrich
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.)
Timex Group USA Inc
Original Assignee
Timex Corp
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 Timex Corp filed Critical Timex Corp
Priority to US00477731A priority Critical patent/US3854280A/en
Application granted granted Critical
Publication of US3854280A publication Critical patent/US3854280A/en
Priority to CH714275A priority patent/CH613083B/de
Priority to DE19752524414 priority patent/DE2524414A1/de
Priority to FR7518085A priority patent/FR2274081A1/fr
Priority to JP50070122A priority patent/JPS518968A/ja
Assigned to CHASE MANHATTAN BANK, N.A., THE reassignment CHASE MANHATTAN BANK, N.A., THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREDERIKSPLEIN HOLDING 1970 B.V., TIMEX CLOCK COMPANY, A DE CORP., TIMEX COMPUTERS LTD., A DE CORP., TIMEX CORPORATION, A DE CORP., TIMEX ENTERPRISES, INC., A BERMUDA CORP., TIMEX GROUP LTD., A BERMUDA CORP., TIMEX MEDICAL PRODUCTS LTD., A BERMUDA CORP., TIMEX N.V.
Anticipated expiration legal-status Critical
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

  • ABSTRACT A mechanical digital watch comprises a continuously rotating minute disc having the numerals 0 through 59 positioned consecutively about the periphery thereof and an hour disc having the hour numerals thereon which is driven by a cannon pinion through a Geneva drive pinion arrangement.
  • the hour disc is stationary during approximately 54 minutes of each hour and rapidly shifts to the next digit between 3 minutes before each hour to 3 minutes past each hour.
  • the time indicating discs are in gear engagement with each other which prevents them from falling out of synchronism with each other under shock.
  • the present invention relates to watches and particularly to a mechanical digital watch having a unique drive arrangement for the time indicating means.
  • the present invention relates to a mechanical digital watch which includes a conventional second hand and a continuously rotating minute disc with suitable indicia located thereon and a concentrically mounted hour disc of larger diameter than the minute disc with indicia arranged about the periphery thereof;
  • the hour disc is maintained in a stationary position with one hour numeral showing in the center of a dial window du'ring approximately 54 minutes of each hour;
  • a cannon pinion coupled to the watch drive means actuates a Geneva gear portion of an hour drive pinion once each hour, driving the pinion by one-fifth revolution when a protruding nose on the cannon pinion engages the Geneva pinion.
  • An upper gear portion of the Geneva drive portion (the hour drive pinion), engages teeth on the hour disc thereby advancing the hour disc during a short interval at the turn of each hour.
  • the hour disc advances during an interval of approximately 6 minutes at the turn of each hour without the use of detenting springs. Furthermore, since the time indicating discs are in gear engagement with each other, they are prevented from falling out of synchronism with each other if a sudden shock is received.
  • an object of this invention is to provide a new and improved mechanical digital watch.
  • Another object of this invention is to providev a new and improved mechanical digital watch wherein the hour change is effected in a rapid manner at the turn of each hour.
  • a further object of this invention is to provide a new and improved digital watch wherein the hours and minutes are indicated on respective discs which are in gear engagement with each other to eliminate problems resulting from sudden shocks or rough use.
  • FIG. 1 is a plan view of the mechanical digital watch with portions shown in phantom;
  • FIG. 2 is a cross-sectional view of the watch of FIG. 1 taken along the line 2-2 of FIG. 1;
  • FIG. 3 is a partial cross-sectional view taken along the line 3-3 of FIG. 1 showing the relationship of the minute and hour indicia;
  • FIG. 4 is a partial plan view taken along the line 4-4 of FIG. 2 showing the interaction of the Geneva drive pinion with the hour disc gear;
  • FIG. 5 is a partial plan view taken along the line 55 of FIG. 2 showing the cannon pinion in engagement with the Geneva drive pinion;
  • FIG. 6 is a partial plan view with portions cut away to show the cannon pinion and the minute and hour discs.
  • the invention comprises a mechanical digital watch 10 having a case 11 with a conventional stem 12 protruding outwardly therefrom.
  • the mechanical digital watch 10 of FIG. 1 includes a dial 13 having window means 14 and 16 through which the hour indicia l7 and minute indicia 18, respectively, may be viewed.
  • the hour indicia l7 arelocated on an hour disc 19 which rotates about the watch drive shaft 21 while the minute indicia 18 are positioned about a minute disc 20 of lesser diameter which continuously rotates about the drive shaft 21.
  • the window means 14 and 16 are located in the middle of the watch 10 and on opposite sides of the drive shaft, with the window 14 being located to the viewers left and the window 16 to the viewers right. It is, of course, possible to envision an alternative arrangement with the hours and minutes being viewed through a single window (not shown) either to the left or right of the drive shaft.
  • FIG. 2 shows a drive coupling assembly 22 which includes shaft 21 on the upper portion thereof.
  • the coupling assembly 22 is connected to a conventional drive arrangement (not shown) and is pivotally mounted in members 23 and 29.
  • a seconds hand 24 is mounted to the shaft 21 for rotation above the dial 26.
  • the drive arrangement also includes a minute pipe or sleeve 27.
  • the entire drive assembly is mounted between frame member 29 and the dial 26 which are mounted together at the periphery of the watch 10.
  • the minute disc 20 is press fit on sleeve 27 and to the shoulder 25 of member 28 for continuous rotation thereabout and is held in place by a spring member 31.
  • the concentrically arranged free running hour disc 19 is generally located beneath the minute disc 20 and extendsoutwardly from sleeve 28 which in turn is supported on shoulder 35.
  • the end portion 32 of the disc 19 is located above the main body portion 33 and at a slight downward slope.
  • the hour indicia 17 are located on the outer portion of the hour disc.
  • a cannon pinion 34 see FIG. 6, is mounted to sleeve member 28 and includes protruding nose portion 37 which engages Geneva drive pinion 38 once during each hour to rotate the pinion 38 by one-fifth revolution.
  • the Geneva drive pinion 38 is part of a pinion hour drive member 39 which is mounted for rotation about shaft 41.
  • the Ge- 1 neva drive pinion 38 see FIG. 5, comprises five teeth shaped in a predetermined Geneva configuration which comprise the lower portion of member 39.
  • the upper portion of member 39 comprises a drive pinion 42 having five teeth 43 which consecutively engage the twelve teeth 45 of the hour disc gear 44 which projects downwardly from the hour disc 19.
  • the seconds are indicated by the conventional seconds hand 24 while the minute indication is viewed through the window 16 on a continuously rotating minute disc 20.
  • the hour disc 19 remains stationary with one hour numeral 17 showing in the center of window 14 during approximately 54 minutes of every hour.
  • the Geneva hour drive pinion 38 is engaged by protruding nose 37 on the cannon pinion 34 and is rotated by about one-fifth revolution.
  • the upper gear portion 44 of the hour drive pinion arrangement 39 engages the hour disc teeth 45 on gear 44 to advance the hour disc at the turn of the hour in a rapid manner terminating at approximately 3 minutes after the hour.
  • a digital watch having an outer case and watch drive means located therein comprising:
  • a minute disc coupled to said shaft and having indicia located on the periphery thereof for indicating minutes, said indicia being viewable through said window in the dial,
  • an hour disc concentrically coupled to said drive shaft and having hour indicia located about the periphery thereof, said indicia being viewable through said window in the dial, said hour disc having a disc gear portion extending therefrom,
  • a cannon pinion coupled to said drive shaft and having a protruding nose portion on the periphery thereof, and,
  • a pinion hour drive assembly comprising 21 Geneva drive pinion actuated each hour by said cannon pinion and a pinion gear portion which engages the hour disc gear to drive said gear during a relatively short interval at the turn of each hour thereby rapidly changing the hour indicia in said window.
  • the minute disc is coupled to the drive shaft for continuous rotation
  • the cannon pinion is coupled to the drive shaft to complete one rotation each hour, and,
  • the hour disc is coupled about said drive shaft and held fixedly in position by the pinion hour drive assembly except for a short interval at the turn of each hour when said assembly is engaged by the cannon pinion.
  • a digital watch in accordance with claim 2 wherein:
  • the hour disc gear has twelve protruding teeth thereon and the pinion drive portion of the pinion hour drive assembly has a plurality of protruding teeth which engage said hour disc gear teeth to drive said gear during a short interval at the turn of each hour.
  • the Geneva drive pinion portion of the pinion hour drive assembly comprises a Geneva gear configuration having a plurality of teeth, equal in number to the teeth on the pinion drive portion, which are engaged by the nose portion of the cannon pinion once each hour during the turn of said hour to rapidly rotate said hour disc.
  • the window opening in the dial comprises a first hour window and a second minute window located on opposite sides of the drive shaft with the hour window being located to viewers left and the minute window being located to viewers right.
  • a digital watch in accordance with claim 2 further including:
  • the minute disc is mounted to said drive shaft for continuous rotation and wherein the hour disc is coupled to said drive shaft for rotation during a period of approximately 6 minutes at the turn of each hour to effect rapid rotation of said hour disc.
  • the hour disc comprises a main body portion substantially perpendicular to the drive shaft and outer sloping portion having the indicia located on the upper surface thereof.
  • a digital watch in accordance with claim 2 wherein:
  • the pinion hour drive assembly comprises an upper pinion gear portion and a lower Geneva drive pinion portion, and,
  • the hour disc includes a downwardly extending hour disc gear into which engages the pinion gear portion of said assembly to hold said hour disc in place under shock.
  • the window opening comprises a single window through which the hour indicia and minute indicia may be viewed.
US00477731A 1974-06-10 1974-06-10 Mechanical digital watch Expired - Lifetime US3854280A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00477731A US3854280A (en) 1974-06-10 1974-06-10 Mechanical digital watch
CH714275A CH613083B (de) 1974-06-10 1975-06-03 Digitaluhr mit mechanischem gangwerk.
DE19752524414 DE2524414A1 (de) 1974-06-10 1975-06-03 Digitaluhr mit mechanischem gangwerk
FR7518085A FR2274081A1 (fr) 1974-06-10 1975-06-10 Montre numerique mecanique
JP50070122A JPS518968A (de) 1974-06-10 1975-06-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00477731A US3854280A (en) 1974-06-10 1974-06-10 Mechanical digital watch

Publications (1)

Publication Number Publication Date
US3854280A true US3854280A (en) 1974-12-17

Family

ID=23897125

Family Applications (1)

Application Number Title Priority Date Filing Date
US00477731A Expired - Lifetime US3854280A (en) 1974-06-10 1974-06-10 Mechanical digital watch

Country Status (5)

Country Link
US (1) US3854280A (de)
JP (1) JPS518968A (de)
CH (1) CH613083B (de)
DE (1) DE2524414A1 (de)
FR (1) FR2274081A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376996A (en) * 1981-04-27 1983-03-15 Timex Corporation Thin stepping motor watch
US4676659A (en) * 1985-09-27 1987-06-30 Eta Sa Fabriques D'ebauches Intermittent driving arrangement for a time indicator
GB2309557A (en) * 1996-01-23 1997-07-30 Limani Oudani Rotating-disk watch
US20050152225A1 (en) * 2002-10-01 2005-07-14 Carlos Dias Mechanical hour and minute display device
US20110090768A1 (en) * 2009-04-30 2011-04-21 Lange Uhren Gmbh Watch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239217A1 (de) * 1982-10-22 1984-04-26 Wolfram 8019 Untereichhofen Müller Scheibenrotations-uhr
JPS5989394A (ja) * 1982-11-15 1984-05-23 Hitachi Ltd 金属加工用潤滑剤組成物
DE102014117436B3 (de) * 2014-11-27 2015-11-05 Lange Uhren Gmbh Schrittschalteinrichtung
EP3811157A1 (de) * 2018-06-20 2021-04-28 Patek Philippe SA Genève Digitale anzeige für eine uhr
EP4012508A1 (de) * 2020-12-08 2022-06-15 Montres Breguet S.A. Anzeigevorrichtung einer uhr auf mehreren ebenen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633696A (en) * 1944-11-22 1953-04-07 Casco Products Corp Cyclometer clock
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter
US3685283A (en) * 1970-11-13 1972-08-22 Joseph Bamat Digital watch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633696A (en) * 1944-11-22 1953-04-07 Casco Products Corp Cyclometer clock
US3045418A (en) * 1960-06-07 1962-07-24 Ed Heuer & Co Sa Time meter
US3685283A (en) * 1970-11-13 1972-08-22 Joseph Bamat Digital watch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376996A (en) * 1981-04-27 1983-03-15 Timex Corporation Thin stepping motor watch
US4676659A (en) * 1985-09-27 1987-06-30 Eta Sa Fabriques D'ebauches Intermittent driving arrangement for a time indicator
GB2309557A (en) * 1996-01-23 1997-07-30 Limani Oudani Rotating-disk watch
GB2309557B (en) * 1996-01-23 2000-01-19 Limani Oudani Rotating disc watch or clock
US20050152225A1 (en) * 2002-10-01 2005-07-14 Carlos Dias Mechanical hour and minute display device
US7075860B2 (en) * 2002-10-01 2006-07-11 Manufacture Roger Dubuis S.A. Mechanical hour and minute 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
FR2274081B3 (de) 1978-02-03
CH613083GA3 (de) 1979-09-14
JPS518968A (de) 1976-01-24
FR2274081A1 (fr) 1976-01-02
CH613083B (de)
DE2524414A1 (de) 1975-12-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CHASE MANHATTAN BANK, N.A., THE

Free format text: SECURITY INTEREST;ASSIGNORS:TIMEX CORPORATION, A DE CORP.;TIMEX COMPUTERS LTD., A DE CORP.;TIMEX CLOCK COMPANY, A DE CORP.;AND OTHERS;REEL/FRAME:004181/0596

Effective date: 19830331