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
  • G04B19/06—Dials
  • G04B19/08—Geometrical arrangement of the graduations

Definitions

• the present invention relates to a clock driven by a mechanical, electrical or electronic motor with an analog and unambiguous 24-hour display according to the preamble of claim 1.
• Several clocks with an analog and unambiguous 24-hour display are known, for example from DE 267 810 (Dl), US 5,696,740 (D2), WO 91/03774 (D3).
• D1 and D2 the 24-hour uniqueness is resolved with two concentric dials, each 12 hours, where the first 12-hour group sets the time from 0 ⁇ -12: 00, the second 12-hour group sets that of 12-- 12 a.m.
• the hour hand changes its position abruptly during the transition from one scale to the other; it is either extended jerkily or shortened as well.
• the devices for length change of the hour hand disclosed in D1 and D2 either require additional energy from the clock motor to tension a spring (Dl) or an additional energy source (D2).
• Dl additional energy source
• D2 additional energy source
• D3 shows the hours on two halves of the circle with different radius at all times of the day and night. Neither the technical feasibility nor the market acceptance were solutions that were able to prevail.
• clocks have become known which have non-circular scales, for example in DE 196 41 885 (D4), DE 299 03 950 (D5) and DE 299 04 451 (D6). While in D4 an hour display element is moved on any curve as a guide element, in D5 the display element is guided on cycloids by means of an additional gear and in D6 the display element moves on curves that are generated by a four-bar gearbox, means are described here that to move said display element on non-circular orbits, but a 24-hour display of a clear nature is not disclosed thereby.
• FIG. 1 is a top view of a first exemplary embodiment
• FIG. 2 shows a detail from FIG. 1, with a first exemplary embodiment of a guide element, 3 shows a longitudinal section through the exemplary embodiment from FIG. 1,
• Fig. 4 shows a detail of Fig. 3 with a second exemplary ⁇ h- approximately example of a Fuhrungsiatas
• Fig. 5 shows a second exemplary embodiment in a schematic longitudinal section
• FIG. 6 shows the exemplary embodiment of FIG. 5 m in a schematic plan view.
• FIG. 1 is a top view of a first exemplary embodiment of a watch according to the invention.
• an hour display element according to the invention is shown in the form of a long changeable hour hand 5.
• the tip of the hour hand 5 runs on a double-loop closed curve 7 with an outer loop 8 and an inner loop 9, which have a crossing point 6.
• Daytime hours from 6 a.m. to 6 p.m. are assigned to outer loop 8 and night hours from 6 p.m. to 6 a.m. to inner loop 9. Since this assignment is only graphical in nature, it can of course also be reversed.
• Such a double-loop closed curve is, for example, the conchoid, also called Pascal's snail (described, for example, in Karel Rektorys, Applicable Mathematics, Cambridge, Mass., USA, 1969).
• 1 shows the representation of a second conchoid 10, which emerges from curve 7 with an outer loop 8 and an inner loop 9 by a constant radial offset.
• This second conchoid 10 is shown in dashed lines, since it can be covered by a disk 11; it is designed as a guide curve and explained in more detail together with the guide elements in FIG. 2.
• Fig. 2 is the representation of only the inventive part of the clock.
• the disk 11 is only shown in broken lines and transparently and gives a clear view of the conchoid 10 underneath and covered by the disk 11.
• the hour hand 5 is made in two parts. Its outer part, numbered 13, is pivotally connected to a sliding element 12; this sliding element 12 lies in the, for example, groove-shaped conchoid 10 and follows the path of this conchoid 10 in the circumference of the inner part of the hour hand 5.
• the inner part of the hour hand 5 mentioned bears the number 14 and is firmly connected to the disk 11. The disc 11 thus, together with the inner part 14 of the hour hand 5, makes one revolution in 12 hours.
• the sliding element 12 is shaped like a sickle in such a way that the radius of curvature of the outer surface is smaller than the smallest radius of curvature of the outer surface of the conchoid 10, and that of the inner surface is larger than the largest radius of curvature of the inner surface of the conchoid 10
• the longitudinal extension of the sliding element 12 measured in the tangential direction is so large that at the intersection of the two loops of the conchoid 10 (which bear the numbers 15, 16) the sliding element 12 is guided securely from the outer loop 15 onto the inner loop 16 , or from the inner loop 16 to the outer loop 15.
• Fig. 3 is a longitudinal section through the exemplary embodiment of Fig. 1, for example by 24 h.
• a dial 24 serves here as an assembly platform for all the other elements mentioned and still to be mentioned.
• This element, which is referred to below as dial 24, can be both factory and house-related. It is only essential that the reference to the actual dial is fixed when the watch is in operation.
• the conchoid 10 with its outer loop 15 and its inner loop 16 is worked into the dial 24, for example by milling.
• a, called hour tube 18, hollow shaft is mounted, with which the disc 11 and the inner Part 14 of the hour hand 5 are firmly connected.
• the inner part 14 of the hour hand 5 is, for example, still connected to the disk 11 with a support 19.
• the disk 11 has a radial slot 20, running parallel to the inner part 14 of the hour hand 5.
• a guide pin 12 is movable, with which the outer part 13 of the hour hand is connected to the sliding element 12.
• the sliding element 21 is thus moved in the azimuthal direction through the disk 11.
• the guide pin 21 is, for example, firmly connected to the sliding element 12 and is rotatably mounted in the outer part 13 of the hour hand 5 about its longitudinal axis. According to the invention, however, this can also be solved in such a way that the guide pin 21 is fixedly connected to the outer part 13 of the hour hand 5 and is rotatably mounted in the sliding element 5 about its longitudinal axis.
• the outer part 13 of the hour hand 5 is arranged so that it can move slowly with respect to its inner part 14, for which arrangement several solutions which are not described here are known.
• FIG. 4 shows a section of the conchoid 10 together with a further exemplary embodiment of a guide element 17 mentioned in FIGS. 2, 3. This consists of a support body 25 and here, for example, three wheels 26, 27 rotatably mounted in it. 28.
• the middle wheel 26 is on the outside so that it can touch the outer surface of the conchoid 10; the other two wheels 27, 28 can touch the inner surface of the conchoid 10.
• the arrangement of the three wheels 26, 27, 28 is further designed so that the guide member 17 in both that part of the conchoid 10 with the largest radius of curvature, as well as in that with the smallest with radial play is movable in the tangential direction.
• the supporting body 25 carries the guide pin 21, for which the same applies, as said in this regard in FIG. 3.
• FIG. 4 - but dashed - is a variant of the support body 25.
• An arm 29 of the support body 25 is designed as a spiral spring 30, so that all three wheels 26, 27, 28 always touch the side surface of the conchoid 10 assigned to them.
• both arms of the support body 25 can be designed as spiral springs 30, with which the contact pressure of the wheels 26, 27, 28 on the side surfaces can be metered better.
• the length of the guide member 17, that is to say the distance between the outer wheels 27, 28, is selected such that the crossing point of the two loops 15, 16 of the conchoid 10 can be passed in the correct sense.
• the number of wheels 26, 27, 28 can of course be selected differently, for example larger, with the corresponding adjustments to the shape and structure of the support body 25.
• FIG. 5 and 6 are illustrations of a second embodiment for the management of. Tip of the hour hand 5 on the provided double-loop curve 7.
• FIG. 5 is a section perpendicular to the plane of the dial 24,
• FIG. 6 is a plan view.
• FIG. 5 is designed so for the purpose of better understanding that all subsequent axes lie in the same plane, which 'is actually never the case.
• a two-loop curve (also called a Pascal screw) 31 with an outer loop 40 and an inner loop 41 and a crossing point 42 is shown in dashed lines. This corresponds functionally to the conchoid 10 from FIG.
• this curve 31 is The gear wheels and guide arms effect as follows:
• a gear A Fixed to the dial 24 - or the mounting platform corresponding to it - is a gear A arranged coaxially to the hour tube 18 with radius r (A).
• the hour tube 18 carries an arm 32 which rotates with it and in which an axis 36 of a second gear wheel B with a radius r (B) is mounted, where applicable
• the arm 32 can be a component which is flat in a plane parallel to those of the gearwheels.
• it carries, firmly connected to it, a third gear C with radius r (C), which meshes with a fourth gear Dl with radius r (Dl), which is supported by an axis 33.
• This is supported in a second arm 34.
• the second arm 34 sits firmly on the axis 36 of the second gear B and therefore rotates with it.
• the axis 33 of the fourth gear D1 carries - also firmly connected to it - a fifth gear D2 with radius r (D2), which meshes with a sixth gear E with radius r (E).
• This sixth gear wheel E is mounted on an axle 35 which is attached to the second arm 34 at a distance d (E) from the axle 36 and runs parallel to all the axles mentioned above.
• the sixth gear E carries the guide pin 21, which runs parallel to the axes 33, 36, at a distance d (F) from the axis 35.
• r (C) is not dependent on r (A), but is given purely opportunistically by the space available, with the restriction that - if the hour tube 18 is assigned the radius r (18) -
• FIGS. 5, 6 are the disk 11 and the outer and inner parts 13, 14 of the hour hand 5. All these elements can be arranged as shown in the first exemplary embodiment.
• the actual dial 24 can be at least partially transparent and can be arranged such that the minute and second hands 1, 2 run over it, but the hour display below.
• the toothed wheel E then carries a marking which is particularly emphasized by its brightness or color - for example a round disc - which rotates on the double-loop curve 31. This disc then replaces the tip of the hour hand 5. The latter, as well as the disc mentioned, are then display elements.
• gearwheels and, if appropriate, these supporting arms can be realized for the transmission specialist and are contained in the inventive concept, which fulfill the task of generating the desired conchoid as a path of the display element with a guide pin 21 or a component corresponding to it.

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• Physics & Mathematics (AREA)
• Geometry (AREA)
• General Physics & Mathematics (AREA)
• Electromechanical Clocks (AREA)
• Electric Clocks (AREA)
• Lock And Its Accessories (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=4214284

Family Applications (1)

Country Status (10)

Cited By (2)

Families Citing this family (8)

Family Cites Families (13)

• 2000
  • 2000-09-01 DE DE50015790T patent/DE50015790D1/de not_active Expired - Lifetime
  • 2000-09-01 JP JP2001522146A patent/JP4471548B2/ja not_active Expired - Lifetime
  • 2000-09-01 CA CA002347860A patent/CA2347860A1/fr not_active Abandoned
  • 2000-09-01 EP EP00954245A patent/EP1125172B1/fr not_active Expired - Lifetime
  • 2000-09-01 CN CNB00802474XA patent/CN1154027C/zh not_active Expired - Fee Related
  • 2000-09-01 WO PCT/CH2000/000466 patent/WO2001018612A1/fr active Application Filing
  • 2000-09-01 US US09/830,929 patent/US6809992B1/en not_active Expired - Fee Related
  • 2000-09-01 AU AU66796/00A patent/AU6679600A/en not_active Abandoned
  • 2000-09-01 AT AT00954245T patent/ATE448510T1/de not_active IP Right Cessation
• 2002
  • 2002-05-30 HK HK02104032.0A patent/HK1042343B/zh not_active IP Right Cessation

Non-Patent Citations (1)

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