DEP0011546DA - Pointer drive for clocks, preferably with an electric drive - Google Patents

Description

-i! rais- i ^ te ^ -t ^ -Ing DietTlch -F τ ■ e i- .rl e. 1

in Sansen Kreis 17 Ιέ en, - = SS gg i ge r t . τ j eb w rk for clocks, preferably international drive. be4 ^>? e # ^: # ewl *.

The gears between the second and minute hands (ΐ: 60} and between the minute and hour hands (1:12 or exceptionally 1:24) form essential parts of every clock and are almost always designed as normal spur gears , as these have the lowest friction losses «In addition, clocks have become known in which these gears are replaced by ratchets and ratchet wheels. In addition to considerable losses in rotation, the strong irregularity of the drive in

■■ How

A purchase is made, which leads to considerable peak values of the required torque .

Apparently the now well known in the art anderen'Zweigen Sehenergetriebe to Figure 1 have not yet been used in Ulirenbati, despite a significant simplification of TJhresiwerkes .ermöglichen "The friction losses are indeed greater than for spur gears, but the drive is completely evenly, so These gears are perfectly suitable for watches in which the drive power for the pendulum or the unrest is not passed through the gears, i.e. preferably electrically operated watches.

While in A-Ilgemeinen the inner wheel Χ, Ι'Κ in Fig. 1 by the crank \ 5 \ in the wheel% 2%, xm O is pivoted, being ensured by special measures that the wheel% l \ is can only move free of rotation, and are transmitted, the slow rotation of the wheel ^ 2'X to the output shaft O, is to allow to build up a Uhrgetriebes on zweekmässigsten, _ completely fix the wheel Ir 'and rotate the crank to O the rotatable in O Wheel X 2% mounted on the crank then simultaneously performs a scrubbing movement with the frequency of the crank and a rotation that is slowed down according to the number of teeth. If such a transmission (for example, with 11 teeth on the wheel XliS and 12 teeth on the wheel "% 2 \ used to drive the hour hand,

Claims (1)

so can this? set directly on the labe of the wheel % 2 \ Vierden, because • 'the. Abrasion movement can be kept so low that it does not interfere with the readings. If such an overall, gear (for example with 59 Tszw. .60. Teeth) for driving the minute hand applied, must zwischen.dessen shaft and .the wheel £? 5 is a clutch to be set, the scrubbing movement of the wheel 2%) ~ does not transmit to this wave. Such a construction of this transmission has the particular advantage :, that the RADT ^- H. is fixed stages in each of the two gears, so that these two wheels with the pointer shaft bearing and the mounting flange of the movement can become part · Matching Caps length construed as a result of Extraordinary ^ long intervention only a few teeth or Headstock of the wheel % 2 ^ Ti really need to be carried out. Particularly favorable manufacturing conditions result from these measures. Figure 2 shows a complete gearing for a clock, built with 2 such drives and a perforated disk clutch, whose electrical drive ^ 4 \ l acts directly on the second hand shaft t5i, on whose crank t6) "the pin wheel t7'X - correspondingly ^ 2 ^ in Fig. 1 - is stored «This is in engagement with the ~ - irRad 1; 1 in Fig. 1 corresponding ring gear "('8')., Of the bearing plate % 9 \ and takes the perforated disk" ^ -11% riveted to the minute hand shaft O ^ _{1 with it.} T he> on this wave wedged eccentric 2)., The hour schwenlct 113 ^? which is in engagement with the toothed rim ^ 1 A% of the bearing plate and bears the hour hand X '1 5% , while the minute "(16 ^ and Selranden hand" fl7l sit on the corresponding shafts. ρ at ent ans ρrüche : Claim-] . ZasLgertriebwerk for clocks, preferably with an electric drive ', characterized in that known single-stage gears are used for the translations from the second to the minute hand shaft and from the single-minute shaft to the hour hand or for one of these translations one of two meshing gears £ 1 $ - and <£ 2 ^ swiveled by a Eurbel (3) and one of them at the end execution of a Tireli movement is prevented so that the other executes the longitudinal angsanie "rotation corresponding to ¹ d « -H ^ -ähKSfiEahlen _v ^{. '1 4} "'*"'f' - 'l- ''Λ' f V ' » .. ^ - it Ansprucn · ü: aeigertrieDwerjc to Antrieo AES \ the hour hand according to claim 1 characterized dädurch that the lcleinere wheel (1) is established. ^ väh'rend the rotation excitation of the larger Eades pivoted by the Kurhel (3) is transmitted directly to the hourly serpent Claim 3 °. Zeigertrie DwerK zum AntrxeD aea? Minute hand shaft according to Claim 1, characterized in that the smaller wheel (1) is stationary, -during the rotational excitation of the larger wheel (QX ' ¹ minute hand shaft is transmitted. Claim 4; Pointer drive "I. -? Characterized in that the fixed gears (8) and (14) with the pointer bearing bush and the fastening bottle of the clockwork are united to one part and that either with the larger or on the smaller wheels only a part of the teeth is actually executed "