US3205650A - Clocks with date indicators - Google Patents

Description

Sept. 14, 1965 w. TRIMPLER CLOCKS WITH DATE INDICATORS 2 Sheets-Sheet 1 Filed Jan. 7, 1963 FlG.1

INVENTOR Walter TRIMPLER Se t. 14, 1965 w. TRIMPLER 3,205,550

CLOCKS WITH DATE INDICATORS Filed Jan. 7, 1965 2 Sheets-Sheet 2 INVENTOR Walter TRIMPLER United States Patent 3,205,650 CLOCKS WITH DATE INDICATORS Walter Trimpler, Nurnberg, Germany, assignor to Firma Diehl, Nurnberg, Germany, a German Kommanditgesellschaft Filed Jan. 7, 1963, Ser. No. 249,920 Claims priority, application Germany, Jan. 13, 1962, D 23,992, D 37,917 14 Claims. (Cl. 585) This invention relates to calendar clocks and particularly to the actuation of the date dials of such clocks.

It is known practice for calendar clocks to have either one or two date-discs bearing the numbers 1 to 31, placed behind the clock dial in such a manner that the disc or discs can rotate, the said dial having a window within which the revelant dates appear one after the other.

It is also known practice for this indicator arrangement, consisting of one or two date discs, to be advanced in 24 hour intervals at midnight, so that at the end of months having less than 31 days, the arrangement has to be indexed forward manually by one or more intervals, in order to maintain the correct date indication sequence.

Automatic indexing of the date indicator arrangement by the clock mechanism is effected through the medium of the hour wheel shaft, in known arrangements of this type, means being provided whereby after each second revolution of the hour hand, the forward indexing move ment is rendered ineffective. The necessary indicator correction called for every other month is effected for instance, by advancing the clock mechanism by 24 hours, or, on the morning of the first day of the month, by turning the clock back to 12 oclock midnight, then moving it backwards and forwards at least once over the range of the period of meshing of the clock mechanism with the date indicator arrangement. The said meshing period between the clock mechanism and date indicator arrangement requires at least one hour to complete the forward indexing of the date disc or date discs.

It is also known, in order to achieve a quick date change, to fit a spring arrangement to the clock, the said spring arrangement being tensioned by the date indexing arrangement over a protracted period, so that as the date changes, the date indicator is indexed forward by one complete unit. It is also known practice for clocks fitted with date indicator arrangements, to have additional hand switching means, whereby the indicator arrangement can be indexed forward directly by hand, without the need for adjustment of the clock mechanism.

The present invention likewise relates to a date indicator arrangement which may be indexed forward by the clock movement, as well as by hand.

A feature of this invention is that the necessary arrangement for date indexing requires relatively few components which are simpl to manufacture and which, in I addition, are easily accommodated in a clock.

A further feature of the invention lies in the fact that the date change can take place in a very short period of less than 10 minutes through the medium of the clock movement, without an additional spring arrangement.

Yet another feature of the invention is that for a very low additional expenditure, direct hand changing of the date can be achieved.

According to the invention, the indexing of the date indicator arrangement by the clock movement itself can be achieved by a change gear consisting of a gear wheel and pinion, provided between the minute shaft and the hour shaft, a fixed sun wheel being mounted coaxially with, and adjacent to, the said change gear, and a planet 3,205,650 Patented Sept. 14, 1965 wheel rotating with the change gear and meshing with the said sun wheel. The planet wheel is fitted with an indexing pin, and the size ratio of the minute pinion to the change gear is selected large enough so that in 24 hours the change gear effects a complete number of revolutions, whereas the size ratio of the planet wheel to the sun wheel is different and is sufficient to allow the indexing pin fitted to the planet wheel to assume the sam indexing position, which effects the date change, only at intervals of 24 hours.

According to one modification of the invention, the ratio of the minute pinion to the change gear is 1:3, and the ratio of the planet wheel to the sun wheel is 6:5

.or 6:7, or alternatively the ratio of the minute pinion to the change gear is 1:4 with a planet to sun wheel ratio of 8:7, or 8:9.

The date disc or date discs may, in an arrangement in accordance with the invention, be located off-center from the finger mechanism shaft, and be held in rest positions, the periphery of the date disc of each date disc being notched for the purposes of forward indexing.

For indexing movement of the discs, the clock should preferably be fitted with a transmission component, the said transmission component having a finger projecting in the path of the indexing pin fixed to the planet wheel, so that the said finger may engage with the teeth of the date disc by means of a flexible switching component fixed to a switching lever.

Two date discs may, in an arrangement in accordance with the invention, be located one behind the other, with the dates split into two groups, whereby the front disc has a window, through which the dates on the rear disc can be seen when the forward disc has been brought to a standstill. By appropriate shaping of the teeth on th two discs, these can be actuated alternately by the same switching component, and indexed in common for forward indexing.

Examples of the invention will now be explained in further detail with reference to the accompanying drawings.

FIG. 1 of the said drawings is a front view of a clock mechanism with a date indicator arrangement having one indicator disc.

FIG. 2 is a view of FIG. 1 from above.

FIG. 3 is a vertical section on the line IIIIII of FIG. 2.

FIG. 4 is a front view section on the line IVIV of FIG. 5, showing a clock with a date indicator arrangement having two date-discs.

FIG. 5 is a view from above of the arrangement shown in FIG. 4.

FIGS. 6 and '7 are front views of the date discs shown in FIGS. 4 and 5.

Clock components which are not required for the purposes of explaining the invention have not been shown in the drawings.

In the example shown in FIGS. 1 to 3, the reference numeral 1 shows, in part only, a dial plate having a rectangular window 2 appropriately placed to show the date. A date disc means 3 is mounted on bearings in a support plate 4 so that it will rotate about the shank of a rivet 5 closely behind the dial plate 1. Near its periphery, the front face of the date disc 3 is provided with equally spaced numbers in sequence from 1 to 31, and thirty-one teeth 6 are cut in the periphery of the disc. Furthermore the support-plate 4 carries a leaf spring 8 fixed by means of a screw 7, the angled end 9, of the leaf spring 8, fitting between two of the teeth 6, thereby retaining the date-disc 3 in its thirty-one indexed positions so that any one of the numbers 1 to 31 may appear in the window 2 in the dial-plate 1.

The support plate 4 is fitted with three bracing components bent towards the rear, to which a front clock movement plate 13 is aflixed by means of small wedges 12 with the interposition of rubber buffers 11. In connection with FIGS. 1 to 3, as far as the clock mechanism itself is concerned, only the dial train fitted to the front of the clock-movement plate 13 is shown.

According to a known design, the dial train has a tubular minute shaft 14, in turn coaxially surrounded by an also tubular hour shaft 15, both shafts projecting forward through an opening in the support-plate 4 and the dial-plate 1. The minute shaft 14 has a minute hand 16 fitted to its ends, and the hour shaft is fitted with an hour hand 17. At an appropriate distance, shown in FIG. 3 to the right and above the shafts 14 and 15, a change gear set consisting of first and second coaxial interconnected gears, 19, rotates as a unit about a stub support shaft 18 fixed to clock movement plate 13; gear 19 of the said change gear meshing with a pinion 21 fixed on the minute shaft 14, whilst pinion 20 of the change gear meshes with a gear wheel 22 fixed on the hour shaft 15. By way of example, a dial train can be driven by means of a pinion 23 actuated by the clock mechanism, the said pinion being indicated in dot-dash outline in FIG. 3 but not being otherwise shown, and projecting through an aperture (not shown) in the clockmechanism plate 13, so that it meshes with a gear wheel 24 which is mounted on the minute shaft 14 in friction driving engagement with shaft 14. The dial train is then in fact driven by the clock mechanism, but can be adjusted without regard to the position of the clock movement. For the purposes of manual adjustment, an arrangement can be used consisting, for instance, of a pinion 25 shown in dot-dash outline in FIG. 3, mounted on a manually operable adjuster shaft (not shown), the said pinion meshing with gear wheel 19 of the change gear 19, 20.

The reduction ratio of the minute pinion 21 to the wheel 19 of the change gear should be great enough for the change gear unit 19, 20 to complete a whole number of revolutions in 24 hours. Likewise according to the invention, the total reduction between minute shaft 14 and hour shaft 15 should have a ratio of 12:1, and in view of the coaxial positioning of the two shafts 14 and 15, the reduction ratio of minute pinion 21 to the change gear wheel 19 should not vary too greatly from the reduction ratio between pinion 20 of the change gear and the hour gearwheel 22. The ratio of minute pinion 21 to change gear wheel 19 should preferably be 1:3 or 1:4, so that the change gear revolves six or eight complete turns in 24 hours.

For the purpose offorward indexing of the date disc 3, the following arrangement is provided:

On the front face of the clock movement plate 13 the fixed stub shaft 18 has a large diameter boss, with teeth cut in it to form a fixed sun wheel gear 26. At a suitable distance on completion of 24 hours. The planet pinion 28 which carries pin 29 thus occupies a given position in space only once in 24 hours. The ratio of planet a pivot pin 27 on which rotates a planet wheel 28 which meshes with the sun gear 26. Planet gear 28 is fitted with an indexing or switch pin 29 which is parallel with the gear pivot pin 27, and near the outer edge of the gear 28.

In accordance with the invention, the indexing pin 29 should only take up the same date switching position from the center of shaft 18, the change gear wheel 19 carries gear 28 to sun gear 26 must therefore be appropriately selected.

If the change gear 19, 20 completes six revolutions in 24 hours, then the ratio of planet gear 28 to sun gear 26 must either be 6:5 or 6:7. If the change gear unit carries out eight revolutions in 24 hours, then the ratio of the planet gear 28 to gear 26 must be 8:7 or 8:9. If the ratio is in fact 6:5 or 8:7, then in 24 hours the indexing pin 29 will follow a retarded cycloidal path, whereby it only resumes the same position for switching after s x or eight revolutions; on the other hand if the teeth ratio is 6:7 or 8:9, then the indexing pin will follow an advanced cycloidal path in 24 hours, with the same result.

Through suitable design and location of the date disc 3, the indexing pin 29 can be used directly for forward indexing of the date disc 3. On the other hand, it is more advantageous to the transmission of the indexing movement from indexing pin 29 to date disc 3 to use a special transmission component, as described hereinafter.

At a suitable distance below the rivet 5, which is fixed to the clock movement plate 13, and serves as a bearing for the date disc 3, a stub shaft 30 is located to receive a rotating tubular part 31. At the end remote from the movement plate 13, this tubular section 31 is provided with a finger 32 pointing in the direction of the change gear shaft 18, the end of the said finger 32 terminating in a point, and its length being such that it lies in the cycloid path followed by the indexing pin 29 during the 24 hours. On turning the change gear unit 19, 20 about shaft 18 and in the direction of the arrow shown in FIG. 3, the planet gear 28 revolves around sun gear 26, so that the indexing pin 29 on planet wheel 28 and at a distance from the shaft 18, follows an advanced or retarded cycloid path. This path only crosses the end of finger 32 every 24 hours, and this at the time when the axis of pivot pin 27 passes through a line joining the centres of the fixed shafts 18, 3t), and when at the same time, the radius r connecting the axis of pin 27 with the axis of pin 29 lies on the aforesaid joining line. The indexing pin 29 moving anti-clockwise, then swings the finger 32 in a clockwise direction. During the other revolutions of the change gear unit 19, 20, the indexing pin 29 passes in front of, or behind the end of the finger 32.

Behind the date disc 3, a lever 33, with slot 34, at the end, is rigidly coupled to the front end of the tubular part 31 and lies at right-angles to the finger 32. At the back of lever 33 one end of a spring 35 is fixed, the free end of the said spring being bent outward and brought through the slot 34 in lever 33 to form a spring-loaded switching, or indexing, component 36 for forward indexing of the date disc.

A leaf spring 38 screwed at 37 to the clock-movement plate presses on a flat face 39 of finger 32, thus holding the said finger 32 and thereby lever 33 as well, in the center position as shown, in which the indexing component 36 lies just on the outside of the peaks of the teeth 6 on the date disc 3.

The forward indexing of the date disc occurs as finger 32 and lever 33 swing in a clockwise direction in FIGS. 1 and 3, whereby the indexing component 36 moves along the steep slope of a tooth notch in the date disc 3 and then engages the next radial tooth face and then pushes the disc forward by one step. 011 its return movement the indexing component 36 slides back along the same steep slope and snaps over the peak of the next tooth, moving outwardly under spring loading within the lever slot 34. If the dial train of the clock is set backwardly, finger 32 and lever 33 are swung in a counterclockwise direction by the indexing pin 29, so that as a result of the position of axis 39 and the direction taken by the lever 33, the indexing component 36 does not mesh with the teeth at the periphery of the date disc. The stop spring 8, 9 retains the date disc firmly in any assumed position.

If the minute hand 16 and hour hand 17 are pressed onto shafts 14, 15 in the twelve oclock position as the date is changing, and the clock is so adjusted that the date change takes place exactly at midnight, then the correct calendar date will show up during the first thirty days of the month. At the end of months with thirty days, the date disc must be indexed forward one step, and at the end of February by two or more steps, this being carried out by hand. This can be effected by putting back the clock beyond twelve oclock on the morning when the incorrect date shows up, so that an additional date index step occurs in the ensuing adjustment to the correct time. On the other hand, it is much more convenient if the clock is fitted with a device for direct date indexing by hand.

In the example illustrated, this is achieved by a lever arm 40 which projects beyond the under part of the clock casing, and is integral with lever 33. This lever 40 permits date indexing at any time, provided this has not just been effected by the clock mechanism itself. As a result of the high velocity of indexing pin 29 fitted to planet gear 28 the date change takes place within a period of less than ten minutes.

In the example shown in FIGS. 4 to 7, there is provided, between the support plate 4 and the dial plate 1, which in this case has a larger window 2', two date disc means 41, 42 rotatably mounted on rivet 5' in support plate 4. The front disc 41 bears fifteen of the numbers 1 to 3 1 near the edge, shown in the illustration as numbers 17 to 31, and the said disc also has a rectangular window 43 of the same width and height as window 2 in the dial plate, or somewhat greater. The rear disc 42 is numbered from 1 to 16 on the same radius as that of the numbers on the front disc. From the illustrations it will be seen that, when date disc 41 is halted and the window 43 in the said disc lies in alignment with the window in the dial plate 2', then figures 1 to "16 can be indexed and will show through the dial plate 2, and alternatively, when date disc 42 is halted, indexing of date disc 41 will show figures 17 to 31. It is immaterial as to which group of the series 1 to 31 appears on the front or the rear date disc, the essential thing being that the window 43 is located between the last and first number in the series on the front disc, so that the g missing numbers, which will be on the rear date disc,

may appear in window 43, and that during that time the front date disc be at a standstill. Furthermore, the indexing arrangement operates in such a manner that whilst an indexing step is being made, and expediently on the first renewal step, the date disc 41, which will remain at a halt over 16 indexing steps, is adjusted simultaneously with the rear disc 42. In comparison with the use of a single date disc in accordance with the perviously described example, the design incorporating two date discs as suggested has the advantage of permitting a dial face window 2' and numbers on the discs of twice the size of those in the single disc arrangement.

Forward indexing of both date discs 41, 42 by the clock-mechanism and/ or by hand, can be carried out in the same manner as in the example shown in FIGS. 1 to 3. The components are only partly represented in FIGS. 4 and 5, the reference numbers being used the same as for FIGS. 1 to 3. Just as in the previous example, a planet gear 28 mounted on shaft 27, is located off-center relative to a change gear wheel 19, the said planet gear meshing with a fixed sun wheel 26 and being fitted with an indexing pin 29 near its periphery and parallel to the wheel axis 27. Once more, the indexing pin 29 follows the same cycloidal path as that in the previous example.

Since in this case both discs must complete a full revolution in sixteen steps, the indexing lever 33 for the two discs 41, 42 simply has to travel twice as far as in the previous example. This can be achieved, for instance by extending finger 32', or by slightly modifying the position of the finger 32' in the anticlockwise direction as shown in FIG. 4. The free end 36 of a bow-shaped spring acts as the switching component for forward indexing of both date discs 41, 42, the said spring being threaded from the rear through a slot 34' in the switch lever 33 and extending forward so that it meshes with the teeth on both date discs 41, 42 as the lever 33' is tilted clockwise (referring to FIG. 4). A leaf spring 38 bearing on one edge 39 of finger 32 holds finger 32' and lever 33 firmly in a central position. For the purpose of deliberate hand adjustment of the date discs, a hand lever 40 is also integral with lever 33' in this example, and projects beneath the clock housing. For the purposes of forward indexing the two date discs at the required pace, alternately, and in common for one step, the following arrangement is provided for:

Each of the two dates discs 41, 42 has sixteen saw tooth shaped teeth at the periphery. One of the two discs (date disc 41 in the example) has fifteen teeth 44 at afirst distance from the axis of the disc and one tooth close to the axis, while the other disc 42 in this case, has sixteen teeth 45 at a second distance from the axis less than said first distance by such an amount that the peaks of teeth 45 on disc 42 do not project above the roots of teeth 44 on disc 41. This means that over fifteen index steps, date disc 41 only will be pushed forward by the switching componets 36'. In order to index date disc 42 forwardly, whilst date disc 41 is at a standstill, the said date disc 41 has the said one tooth 46 so formed that the peak of tooth 46 does not project above the roots of teeth 45 on disc 42. When the date disc 41 reaches a position where the lower tooth 46 comes within the path of the switching component 36, then date disc 42 will be indexed forward through the medium of its higher teeth 45 which project above tooth 46. In order that both date discs may be indexed forward together for one step, when the right time occurs, and so that the one disc which has completed its revolution may thereafter be held at a standstill, the root 47 of the tooth following the lower tooth 46 on date disc 41, is lower, ie is located at a lesser distance from the disc axis than the roots of the other teeth of disc 41, and on date disc 42 an appropriately located tooth also has a root 48 deeper than the other tooth roots of disc 42. When, after forward indexing of date disc 42, the tooth root 48 on the said disc reaches a position immediately behind tooth root 47 on disc 41, then the switching component 36' will engage not only in root 48 of disc 42, but also in root 47 behind tooth 46 of disc 41, thereby readjusting date disc 41. Thereafter, for the following 15 steps, only date disc 41 will move forward.

In order that the change over may always occur when the window 43 in date disc 41 comes behind the window 2' in the dial plate, the lower tooth 46 and its adjacent root 17 on date disc 41, and root 48 on date disc 42, must respectively be at such an angle to the window or starting point of the number sequence, as to correspond to the angular position of the switching component 36' in relation to the position of the window 2' in the dial plate. To ensure that both date discs 41, 42 are firmly maintained in each of their sixteen indexed positions, each disc has sixteen holes or notches 49 which are located on a radius within that of the circle of date figures, and within which a locating peg 51 on the end of a holding spring 50 is engageable. The holding springs 50 are both fitted to a small bracket 53 to which they are adjustably secured by a screw 52. The said bracket 53 is rivetted to the support-plate 4. In conjunction with the notches, the two holding springs 50 allow the two discs 41, 42 to be adjusted into the precise location of their indexed positions. They also serve to compensate any slight overtravel or under-travel of the switching or indexing component 36'. Between the two date discs, a further fixed or rotatable thin spacer disc 54 can be located, having such a diameter that the locating pegs 51 of the one disc cannot engage in the notches of the other disc.

What I claim is:

1. In a calendar clock having a frame and concentric minute hand and hour hand shafts in said-frame and date disc means in said frame adjacent said shafts and having numerals thereon for indicating dates, a pinion on the minute hand shaft, a gear on the hour hand shaft, gearing rotatable in the frame comprising coaxial interconnected first and second gears meshing with said pinion and the said gear on the hour hand shaft respectively and providing for a 12:1 speed reduction from the minute hand shaft and to the hour hand shaft, a support shaft fixed in the frame and rotatably supporting said first and second gears, a sun gear fixed in the frame on an axis concentric with said support shaft, a planet pinion rotatably supported on said first gear in an eccentric position thereon and meshing with said sun gear, a pin eccentrically mounted on said planet pinion, a leved pivotally mounted in said frame and having a finger disposed in the path of said pin so said finger will oscillate said lever when the pin passes by the finger, the number of teeth of said sun wheel and of said planet pinion being so selected that said pin engages said finger once every 24 hours, notch means in the periphery of said disc means, and means on the lever to engage said notch means drivingly in one direction of movement only of said lever thereby undirectionally to index said disc means when said lever is oscillated.

2. A calendar clock according to claim 1 wherein the gear ratio between said pinion on the minute hand shaft and said first gear is such that said first gear turns a plurality of whole revolutions in 24 hours whereas the gear ratio between said sun gear and planet pinion is such that said planet pinion makes a plurality of revolutions on its axis in 24 hours but occupies any given position in space only once in 24 hours.

3. A calendar clock according to claim 2 wherein said clock includes a dial forming a face, an aperture in the dial through which numerals on the date disc means are visible, and said lever including means for manual actuation thereof for manual indexing of the date disc means.

4. A calendar clock according to claim 3 wherein said notch means are saw tooth in shape and said lever comprises spring finger means operable to drivingly engage the notch means in said one direction of movement of the lever while yielding on the lever so as to permit the lever to cam over the notch means in the other direction of movement of the lever.

5. A calendar clock according to claim 4 wherein said lever has a slot in the portion adjacent the edge of the date disc means and said spring finger comprises a spring wire secured to the lever and having an end .part bent through said slot and extending over the edge of the date disc means.

6. A calendar clock according to claim 5 wherein said date disc means comprise two concentric discs with numerals on both thereof the same radial distance from the axis of discs and the outermost disc having an aperture therein through which the numerals on the innermost disc can be observed.

7. A calendar clock according to claim 6 wherein each disc has sixteen notches in the periphery, all but one notch of one disc lying radially outside the outer limits of the other disc with the said one notch being deeper than all but one of the notches of the other disc and the said one notch of the other disc being of about the same depth as the said one notch of the said one disc.

8. A calendar clock according to claim 1 in which said sun gear is formed directly on said support shaft.

9. A calendar clock according to claim 6 in which spring means is provided in the frame engaging said lever and biasing the lever toward a neutral position.

10. A calendar clock according to claim 9 in which detent means are provided in the frame engaging said disc means for releasably retaining the disc means in the respective indexed positions thereof.

11. A calendar clock according to claim 10 wherein said detent means are operable for urging said disc means toward exact indexed position to compensate for slight inaccuracies in the indexing movement imparted thereto by said lever.

12. A calendar clock according to claim 6 wherein said deep notches are so located as to become effective when the aperture in the outermost disc registers with the aperture in the said dial.

13. A calendar clock according to claim 3 wherein the gear ratio between the pinion on the minute hand shaft and said first gear is 1:3 and the gear ratio between said planet pinion and said sun gear is 6:5 or 6:7.

14. A calendar clock according to claim 1 wherein the gear ratio between the pinion on the minute hand shaft and said first gear is 1:4 and the gear ratio between said planet pinion and said sun gear is 8:7 or 8:9.

References Cited by the Examiner UNITED STATES PATENTS 2,537,886 1/51 Frank 58-5 2,632,293 3/53 Meyer 5858 2,720, 746 10/55 Punzmann 5 8--5 3,03 6,424 5/62 Perrott 5 8-5 FOREIGN PATENTS 1,169,572 12/58 France.

LEYLAND M. MARTIN, Primary Examiner.

JOSEPH P. STRIZAK, Examiner.

Claims (1)

1. IN A CALENDER CLOCK HAVING A FRAME AND CONCENTRIC MINUTE HAND AND HOUR HAND SHAFTS IN SAID FRAME AND DATE DISC MEANS IN SAID FRAME ADAJCENT SAID SHAFTS AND HAVING NUMERALS THEREON FOR INDICATING DATES, A PINION OON THE MINUTE HAND SHAFFT, A GEAR ON THE HOUR HAND SHAFT, GEARING ROTATABLE IN THE FRAME COMPRISING COAXIAL INTERCONNECTED FIRST AND SECOND GEARS MESHING WITH SAID PINION AND THE SAIDI GEAR ON THE HOUR HAND SHAFT RESPECTIVELY AND PROVIDING FOR A 12:1 SPEED REDUCTION FROM THE MINUTE HAND SHAFT AND TO THE HOUR HAND SHAFT, A SUPPORT SHAFT FIXED IN THE FRAME AND ROTATABLY SUPPORTING SAID FIRST AND SECOND GEARS, A SUN GEAR FIXED IN THE FRAME ON AN AXIS CONCENTRIC WITH SAID SUPPORT SHAFT, A PLANET PINION ROTATABLY SUPPORTED ON SAID FIRST GEAR IN AN ECCENTRIC POSITION THEREON AND MESHING WITH SAID SUN GEAR, A PIN ECCENTRICALLY MOUNTED ON SAID PLANET PINION, A LEVELED PIVOTALLY MOUNTED IN SAID FRAME AND HAVING A FINGER DISPOSED IN THE PATH OF SAID PIN SO SAID FINGER WILL OSCILLATE SAID LEVER WHEN THE PIN PASSES BY THE FINGER, THE NUMBER OF TEETH OF SAID SUN WHEEL AND OF SAID PLANET PINION BEING SO SELECTED THAT SAID PINN ENGAGES SAID FINGER ONCE EVERY 24 HOURS, NOTCH MEANS IN THE PERIPHERY OF SAID DISC MEANS, AND MEANS ON THE LEVER TO ENGAGE SAID NOTCH MEANS DRIVINGLY IN ONE DIRECTION OF MOVEMENNT ONLY OF SAID LEVER THEREBY UNDIRECTIONALLY TO INDEX SAID DISCC MEANS WHEN SAID LEVER IS OSCILLATED.

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