US3597916A

US3597916A - Day and date corrector mechanism for a watch

Info

Publication number: US3597916A
Application number: US833053A
Authority: US
Inventors: Yasuichi Nakagawa
Original assignee: Seiko Instruments Inc
Current assignee: Seiko Instruments Inc
Priority date: 1968-06-20
Filing date: 1969-06-13
Publication date: 1971-08-10
Anticipated expiration: 1988-08-10
Also published as: GB1234004A; SE351502B

Abstract

A day and date corrector mechanism mounted for pivotable displacement from outside said watch and having a quadrilateral aperture therein. A corrector wheel lever cooperatively engages said quadrilateral aperture for the selective positioning of a day and date corrector wheel mounted on said corrector wheel lever. The setting lever is pivotably displaceable between three positions, at one of which said corrector wheel lever may rock between one operative engagement of said corrector wheel for day correction and another operative connection of said corrector wheel for date correction. At the other of the two positions of said setting lever, said corrector wheel lever is restrained with the corrector wheel in a neutral position, while winding and hand setting functions are respectively performed.

Description

o United States Patent 1 1 3,597,916

[72] Inventor YasuichiNakagawa 3,470 687 10/1969 Ono et al. 58/58 Tokymhpan $470,688 l0/l969 Miyasaka 58/58 :2: ?leil' 2329. 45' Pmemed g lo l.445. 99 l-/l966 France i i l i 58/58 1 1 Assisnee Kabushiki Kaisha Daini Seikosha Primary Examiner-Richard B. Wilkinson TokyoJapan Assistant Examiner-George H. Miller,.lr. l Pnomy June 1968 AllurneyBlum, Moscovitz, Friedman & Kaplan [33] Japan [3|] 43/51836 ABSTRACT: A day and date corrector mechanism mounted for pivotable displacement from outside said watch and having [54] DAY AND DATE CORRECT-0R MECHANISM FOR a quadrilateral aperture therein. A corrector wheel lever A WATCH cooperatively engages said quadrilateral aperture for the 3 Chums 4 Drawing as selective positioning of a day and date corrector wheel mounted on said corrector wheel lever. The setting lever is U.S. CL... pivotably displaceable between three ositions at one of H F- --G04b19/24 which said corrector wheel lever may rock between one 0 Search .l o e aflye engagement of corrector whee] for day core 855 rection and another operative connection of said corrector wheel for date correction. At the other of the two ositions of [56] defences Cited said setting lever, said corrector wheel lever is rest zained with UNITED STATES PATENTS the corrector wheel in a neutral position, while winding and 3.093358 58/58 hand setting functions are respectively performed.

6/l963 Meyer F/G.l

Patenfed Au 10, 1971 3,597,916

4 Sheets-Sheet '1 Patented Aug. 10, 1971 4y Sheets-Sheet 2 v Patented Aug. 10, 1971 .4 Sheets-Sheet 5 Patented Aug. 10, 1971 3,597,916

4 Sheets-Shed 4 on also risrecoartiicroa Madmen-res A f watch having a day and date calendar mechanism.

A variety of the corrector mechanisms for correcting the date only have been heretofore contrived and embodied.

However, in order to achieve day correctiomit is necessary to advance or reverse a watch 24 hours. Onthe other hand, there are also watches having day corrector mechanism, but these watches are specially provided with a day correcting button or complicated mechanism so that the appearance is spoiled and the cost of manufacturing proves to be expensive.

This invention intends to avoid these disadvantages. An obtion of an ordinary date correctorwhccl.

An'embodiment of the invention is illustrated in the accompanying drawings in which:

of hand setting. 1

Referring now to the drawings, Us a winding stem, 2 is a clutch wheel turning cooperatively with the winding stem 1 and conjoining to be able to slide axially, 3 is a winding pinion which-transmits the turning, of winding stem I to a crown wheel notshown in the drawings) through the intermediary of clutch wheel 4- Is a" setting lever conjoining with the groove of winding stem 1 and pivoting at the pin 5..lhc setting lever 4 is provided with the pin do which connects with access sively one of the three notchesof a setting lever spring 7 for positioning. A quadrilateral aperture 4b interlocks with the pin Ila-which projects downwardly below the end of the corrector wheel lever II. 6 is a yoke conjoining with the groove of the clutch wheel 2. 9ls the setting wheel lover having at the one. end a pin 90 which projects downwardly below the setting wheel lever 9'snd contacts with the end portion of the setting lever 4, and having at the other end, the setting wheel 8. i0 is a fixed pin of a plate for regulating the movement of the setting wheel lever 9; i1 is the corrector wheel lover which is provided at the lower side of the one end, with the intermediate whecl I2 engaged constantly with the setting wheel 8, and at the upper side of this and, with a day anddate corrector wheel; Iii which turns cooperatively with. the intermediate wheel I2. At the other end of thecorrcctor. wheel lever ii, the

- pin Ila interlocks with the aperture 4!: of the scttinglcvor 4,

I'd-is a. pin which supports the turning movement oithe setting wheel lcvcr 9 and the corrector wheel lever ll. 15 is a yoke spring, 16. Isa-date dial printed withtho dates, and i7 is an intermediate day corrector wheel which coscts always with aday star 18 whichin turn coactswith a dial disk'prlntcd'thc days (not shownin the drawings). I9 is a minute wheel-which cngagoswith the setting whoel'ti, duringhand setting.

FIG. I- shows the mechanism according to the invention during stateol winding the msinspring, thatis to say the watch isin the statc'ol usual running.lnthiutate-, when the winding stem I ll turned, whereof rotationv is transmitted from the clutch wheel: to-the windingtwheclii', thc'crown wheel and the ratchet whccllnot shown in-the drawingslarc turned toallow winding ofthe mainspring to take place. Moreover, in

this state, asthc pin "a located-at the'end of the corrector,

wheel lover II. isrcstrsined'by the aperture 4a of the setting lever 4, the day anddatc corrector whccl I3 is held out of the loci of the date dial Iii and olthe intermediate day corrector wheel 17, that is to say in a neutral position. When the winding stem I. is pulled out from the state shown inI lG. l the setting ject' of this'invention is a day and date corrector mechanism able'to correct simply and surely the day and dateby the air:-

, at the second notch of the setting lever spring 7, and the yoke 6 is pushed by the end of the settinglever 4 to engage the clutch wheel 2 with the setting wheel 8. This state of the mechanism is illustrated in FIG. 2 and FIG. 3. In this state,

when the stem I is turned counterclockwise the clutch wheel 2 and the setting wheel 8 are turned in the direction of arrow A in FIG. 2. At this time, as the corrector wheel lever 11 is in a position which permits the pin Ila to move freely on the diagonal line of the quadrilateral aperture 412, the corrector wheel lever 11 pivoted at the pin I4, comes to the state shown in FIG. 2. Consequently, when the stem 1 is further turned counterclockwise, the day and date corrector wheel-l3 drives the teeth of the date dial I6 one by one and corrects the date. On the contrary, when the stem I is turned clockwise, the setting wheel 8 turns counterclockwise and the corrector wheel lever II, having mounted thereon the intermediate wheel I2 which engages with the setting wheel 8, turns counterclockwise about pin I4 and comes to the state shown in FIG. 3, that is to say, the state of day correction. In this state, the stem 1 is turned clockwise further, the day and date corrector whecl I3 turns the day star 18 to allow day correction to takev place. Since setting wheel lever 9 is restrained by the end of setting lever 4 engaging pin 91: and steady pin I0, setting wheel 8 and clutch wheel 2 will not be disengaged. When the stem is pulled out farther from the state shown in FIG. 2 and FIG. 3, the setting lever 4 rotates clockwise at the pin 5, the pin 44 is located at the third notch of the setting lever spring 7, the yoke 6 is pushed by the end of the setting lever 4 and the pin 90 which is at the end of the the setting wheel lever 9 is released from cooperating with the end of the setting lever. Owing to this, when the clutch wheel 2 connected with the yoke 6 is pushed by the end of the setting lcvcr 4, the setting whccl lever 9 rotates around the pin I4 and the clutch wheel drives the minute wheel 19 through the setting wheel 8. 0n the other hand, as to the corrector wheel lover I I, pin Ila thereof is restrained by the aperture 4b of the setting lover 4 to allow the day and date corrector wheel 13 to come to the neutral position. This state of the mechanism is shown in FIG. 4. in this state, hand setting takes place by turning of stem I, while the day and date corrector wheel I3 runs ldlc at the neutral position.

In the invention, as above mentioned, the quadrilateral aperture. in the setting lever A rcstrains the movement of the factors which makes it expansive. Moreover, as the day and date corrector wheel I3 rests always at the neutral position, except during day and date correction, the. said corrector wheel I3 does not disturb the motion of the date dial, or day star and dioidisk.

l'claim:

l. in a calendar watch having a longitudinally displaccablc winding stem disposable in at least three predetermined positions, mainspring winding means, hand setting means, day setting and display means, and date setting and display means,

. the improvement which comprises a pivotable setting lever coupled to-said winding atom for pivoting in response to the longitudinal displacement of said winding stem and being formed with'a quadrilateral aperture therein; a pivotable corrector wheel lover having a portion thereof projecting into said setting lever aperture for guiding the pivotablc displacement of said corrector wheel lever; and a corrector wheel at a third oi said predetermined positions, saidsctting'lovor aperture and corrector wheel lcvcr being placed to retain said corrector wheel in a neutral position out of-operativc engagemom with said day setting and display means and said datc setting and display means when said winding ste'm'is in said first and third oi'said predetermined positions, and-to permit said corrector wheel lever to selectively rock between'a first placement of said corrector wheel in operative engagement with said day settingand display means for day correction and a second placement of said corrector wheel in operative engagement with said day setting and display means for day correetion and a second placement of said corrector wheel in operative engagement with said date setting and display means for date correction when said winding stem is disposed in .the

second of said predetermined positions.

2. A calendar watch as recited in claim 1, wherein the portion of said corrector wheel lever projecting into said setting lever aperture is engaged against one of a pair of opposed cor- I ners of said quadrilateral aperture when said winding stem is

Claims

1. In a calendar watch having a longitudinally displaceable winding stem disposable in at least three predetermined positions, mainspring winding means, hand setting means, day setting and display means, and date setting and display means, the improvement which comprises a pivotable setting lever coupled to said winding stem for pivoting in response to the longitudinal displacement of said winding stem and being formed with a quadrilateral aperture therein; a pivotable corrector wheel lever having a portion thereof projecting into said setting lever aperture for guiding the pivotable displacement of said corrector wheel lever; and a corrector wheel rotatably mounted on said corrector wheel lever for displacement therewith, said winding stem being operatively coupled to said mainspring winding means at a first of the predetermined positions thereof, to said corrector wheel at a second of said predetermined positions, and to said hand setting means at a third of said predetermined positions, said setting lever aperture and corrector wheel lever being placed to retain said corrector wheel in a neutral position out of operative engagement with said day setting and display means and said date setting and display means when said winding stem is in said first and third of said predetermined positions, and to permit said corrector wheel lever to selectively rock between a first placement of said corrector wheel in operative engagement with said day setting and display means for day correction and a second placement of said corrector wheel in operative engagement with said date setting and display means for date correction when said winding stem is disposed in the second of said predetermined positions.

2. A calendar watch as recited in claim 1, wherein the portion of said corrector wheel lever projecting into said setting lever aperture is engaged against one of a pair of opposed corners of said quadrilateral aperture when said winding stem is positioned in each of said first and third predetermined positions, the projecting portion of said corrector wheel lever being positioned to rock diagonally across said quadrilateral aperture between the other pair of opposed corners thereof when said winding stem is in said second of said predetermined positions.

3. A calendar watch as recited in claim 1, wherein the selective rocking of said corrector wheel lever is in response to the direction of rotation of said winding stem.