US3789604A - Digital watch - Google Patents

Digital watch Download PDF

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Publication number
US3789604A
US3789604A US00333456A US3789604DA US3789604A US 3789604 A US3789604 A US 3789604A US 00333456 A US00333456 A US 00333456A US 3789604D A US3789604D A US 3789604DA US 3789604 A US3789604 A US 3789604A
Authority
US
United States
Prior art keywords
disk
security
gear
cam
indexing
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
US00333456A
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English (en)
Inventor
Z Hurt
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.)
Agon Uhrenfabrik Robert Triebold AG
Original Assignee
Agon Uhrenfabrik Robert Triebold AG
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 Agon Uhrenfabrik Robert Triebold AG filed Critical Agon Uhrenfabrik Robert Triebold AG
Application granted granted Critical
Publication of US3789604A publication Critical patent/US3789604A/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

  • ABSTRACT A digital watch or timepiece with a cam disk seated upon a cannon pinion and provided with an indexing or switching cam for the stepwise indexing or rotation of an hour dial equipped with an indexing or pillar wheel.
  • a security gear is rigidly connected with the pillar wheel, the security gear having teeth which are offset by one half of a tooth spacing with respect to the teeth of the pillar wheel.
  • a circular security disk is rigidly connected for rotation with the cam disk, the security disk being provided with a recess which is symmetrical with respect to a radius directed towards the indexing cam. The recess possesses a size which is just sufficient to insure that in each instance only then, when the cam disk further rotates the pillar wheel, a single tooth of the security gear can pass the security disk.
  • the present invention broadly concerns improvements in timepieces and, more specifically, relates to a new and improved digital indicating watch with a cam disk seated upon a cannon pinion and having an indexing or switching cam which serves for the stepwise indexin g or rotation of an hour disk provided with a pillar wheel.
  • Such type watches which may constitute both wristwatches as well as table clocks or timepieces, are known as such in the art.
  • they For blocking the indexing or pillar wheel, they generally embody a small spring which brakes the movement of the pillar wheel.
  • this blocking mechanism is completely satisfactory.
  • the indicator disks are to be set by hand, then it can happen, particularly if the watch is set in a hurry, that not only during each complete revolution of the minute disk the hour disk is advanced by one hour but the latter also might overshoot one or more hours.
  • a security gear is rigidly connected for rotation with the indexing or pillar wheel.
  • the security gear has teeth which are offset by one half of the tooth spacing from the teeth of the pillar wheel.
  • a circular security disk is rigidly connected with the cam disk and the security disk is provided with a recess which is symmetrical with respect to a radius directed towards the indexing cam.
  • the recess possesses such a size or dimension that only then, when the cam disk further indexes or rotates the pillar wheel, can a single tooth of the security gear pass the security disk.
  • An advantageous manifestation of the invention contemplates rotatably mounting all of the parts driven by the cannon pinion upon a mounting plate. It is also possible to form a single plastic piece the hour disk, the security gear, and the pillar wheel. As a practical matter, the cam disk can be provided with a gear for driving a minute disk connected with a further gear and the cam disk, the gear and the security disk can likewise be fabricated from a single plastic piece.
  • FIG. 1 is a plan view of an exemplary embodiment of digital watch without the watchcase.
  • FIG. 2 is a cross-sectional view of the digital watch depicted in FIG. 1, taken substantially along the line Il-Il thereof, and wherein the gears are partially somewhat rotated.
  • Beneath mounting plate 1 at the side confronting the movement 2, there are concentrically secured three gears 4a, 4b and 40 to the cannon pinion 3, and these three gears are in fact part of the actual watch movement 2 and do not have any influence upon the significant aspects of the invention.
  • a support bushing or sleeve 5 is mounted upon the cannon pinion 3, extending partially within the mounting plate 1 and partially past such mounting plate.
  • the support bushing 5 is mounted in such a way that owing to the friction which is present it participates in the rotational movement of the cannon pinion.
  • a gear 6 is rigidly connected for rotation with the support bushing or sleeve 5 in such a manner that there is not present any play between this gear 6 and the mounting plate 1.
  • This indexing wheel 11 possesses twelve teeth 11a which are uniformly distributed about its periphery and between which can engage the indexing cam 12a. During each complete revolution of the cannon pinion 3 the indexing cam 12a indexes the indexing or pillar .wheel 11 by one tooth. As a braking mechanism to safeguard against unintentional rotation, there is pro- Upon the indexing or pillar wheel 11 there is attached a concentric security gear 14 which bears at its underface against the top'surface of this pillar wheel. its twelveteeth 14a are constructed at the tips so as to possess a substantially trapezoidal configuration and are offset through the spacing of one-half of a tooth with respect to the teeth 11a of the indexing or pillar wheel 11. Hence, always exactly at the center between two radii directed towards the teeth' 11a of the pillar wheel 11, there is always disposed a radius which extends towards the teeth 14a of the security gear 14.
  • This security disk 15 consists of a circular disk having a recess 15a. This recess is located symmetrically with respect to the radius of the disk which extends in the direction of the indexing or switching cam 12a. Further, such recess 15a possesses a shape which approximates that ofa circular segment, however with a secant which is convexly curved with respect to the center point of the disk.
  • this recess 15a The depth or width respectively of this recess 15a is just so large that the teeth 14a of the security gear 14 can pass when they are located approximately symmetrically with respect to a connection line between both centers ofrotation. Since however the security disk rotates together with the pillar wheel only a single'tooth of the security gear can rotatably move past the security disk when the cam 12a moves the pillar wheel because the tooth following the tooth which has moved therepast then bears against the periphery of the security disk and can no longer further rotate. When this happens the braking spring 13 again retains the pillar wheel 11 in such a manner that play is maintained between the security disk 15 and the teeth of the security gear 14.
  • the hour disk 16 which is rigidly secured for rotation and coaxially bears upon the security gear l4, during each complete revolution of the minute disk 9, can only further rotate by the amount of one tooth or one hour respectively. Even with direct setting of the indicator disks by means of non-illustrated indicator setting stems or shafts, it is not longer possible for one or more hours to be overshot.
  • a digital indicating watch comprising a cannon pinion, an hour disk, a pillar wheel provided for said hour disk, a cam disk equipped with an indexing cam seated upon the cannon pinion and serving for the stepwise indexing of said hour disk provided with said pillar wheel, a security gear rigidly connected for rotation with the pillar wheel having spaced teeth, said security gear having spaced teeth which are offset by one-half of the tooth spacing from the teeth of the pillar wheel, a substantially circular security disk rigidly connected for rotation with the cam disk, said security disk having a recess which is substantially symmetrical with respect to a radius directed towards the indexing cam, said recess having a size such that only when the cam disk further rotates the pillar wheel can a single tooth of the security gear pass the security disk.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Gears, Cams (AREA)
US00333456A 1972-02-29 1973-02-20 Digital watch Expired - Lifetime US3789604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH283872 1972-02-29

Publications (1)

Publication Number Publication Date
US3789604A true US3789604A (en) 1974-02-05

Family

ID=4242730

Family Applications (1)

Application Number Title Priority Date Filing Date
US00333456A Expired - Lifetime US3789604A (en) 1972-02-29 1973-02-20 Digital watch

Country Status (4)

Country Link
US (1) US3789604A (enrdf_load_html_response)
JP (1) JPS48104582A (enrdf_load_html_response)
DE (2) DE2307116A1 (enrdf_load_html_response)
FR (1) FR2174066A1 (enrdf_load_html_response)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123897A (en) * 1975-06-04 1978-11-07 Kabushiki Kaisha Daini Seikosha Second jumper spring
EP2574476A1 (en) 2011-09-28 2013-04-03 Trespa International B.V. Method for producing a decorative film and decorative panel comprising said film
WO2015065191A1 (en) 2013-11-01 2015-05-07 Trespa International B.V. A decorative panel
US9091025B2 (en) 2009-03-13 2015-07-28 Trespa International B.V. Method for manufacturing a resin-impregnated decorative paper, and decorative panel
WO2016105202A1 (en) 2014-12-24 2016-06-30 Trespa International B.V. A method for producing a printed decorative paper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US339377A (en) * 1886-04-06 Dial-train for time-pieces
CH146600A (fr) * 1930-01-27 1931-04-30 Henri Golay Charles Pièce d'horlogerie avec cadran à chiffres sauteurs.
US3177647A (en) * 1962-10-31 1965-04-13 Ebauches Sa Timepiece
US3438196A (en) * 1966-04-20 1969-04-15 Citizen Watch Co Ltd Quick-acting feed mechanism for day-and-date indicator means of timepiece

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US339377A (en) * 1886-04-06 Dial-train for time-pieces
CH146600A (fr) * 1930-01-27 1931-04-30 Henri Golay Charles Pièce d'horlogerie avec cadran à chiffres sauteurs.
US3177647A (en) * 1962-10-31 1965-04-13 Ebauches Sa Timepiece
US3438196A (en) * 1966-04-20 1969-04-15 Citizen Watch Co Ltd Quick-acting feed mechanism for day-and-date indicator means of timepiece

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123897A (en) * 1975-06-04 1978-11-07 Kabushiki Kaisha Daini Seikosha Second jumper spring
US9091025B2 (en) 2009-03-13 2015-07-28 Trespa International B.V. Method for manufacturing a resin-impregnated decorative paper, and decorative panel
EP2574476A1 (en) 2011-09-28 2013-04-03 Trespa International B.V. Method for producing a decorative film and decorative panel comprising said film
US9033486B2 (en) 2011-09-28 2015-05-19 Trespa International B.V. Method for producing a decorative film, as well as a decorative panel
WO2015065191A1 (en) 2013-11-01 2015-05-07 Trespa International B.V. A decorative panel
WO2016105202A1 (en) 2014-12-24 2016-06-30 Trespa International B.V. A method for producing a printed decorative paper
US10906265B2 (en) 2014-12-24 2021-02-02 Trespa International B.V. Method for producing a printed decorative paper

Also Published As

Publication number Publication date
JPS48104582A (enrdf_load_html_response) 1973-12-27
DE2307116A1 (de) 1973-09-06
DE7305548U (de) 1973-05-10
FR2174066A1 (enrdf_load_html_response) 1973-10-12

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