US3375653A - Electrical clock movement - Google Patents

Electrical clock movement Download PDF

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Publication number
US3375653A
US3375653A US471207A US47120765A US3375653A US 3375653 A US3375653 A US 3375653A US 471207 A US471207 A US 471207A US 47120765 A US47120765 A US 47120765A US 3375653 A US3375653 A US 3375653A
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United States
Prior art keywords
stepping
lock gear
wheel
teeth
stepping wheel
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
US471207A
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English (en)
Inventor
Wolber Robert
Hettich Otto
Fehrenbach Horst
Armbruster Heinz
Assmus Friedrich
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.)
Gebr Junghans AG
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Gebr Junghans 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 Gebr Junghans AG filed Critical Gebr Junghans AG
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Publication of US3375653A publication Critical patent/US3375653A/en
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    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance

Definitions

  • the invention relates to an electrical clock movement having a torsion oscillator which drives the wheel mechanism and is preferably kept oscillating by contactless means via a known electronic circuit, for example a semiconductor amplified circuit.
  • the invention is based on the problem of designing a movement of this kind in such manner that, whilst exhibiting satisfactory operating qualities, it can be manufactured simply and with the minimum expenditure. Consequently, it is one of the objects of the invention to so arrange the wheel mechanism of a clock of the type mentioned that it requires little space and can be mounted with only a few bearing points.
  • the invention is characterised in that, in a clock movement of the type discussed at the outset, all the wheels, with the exception of the stepping wheel, are arranged to pivot about only two arbors one of which is the hours shaft arbor.
  • the movement is secured, preferably with its carrier, for example the front plate, in the case With the aid of posts disposed closely together.
  • the clock movement is preferably provided with a stepping fork which for every half oscillation of the torsion pendulum steps-on the stepping wheel by the amount of half a tooth pitch.
  • a lock gear having double the number of teeth relative to the stepping wheel and having an adjustable locking member engaging in the toothing.
  • one of the clock plates preferably the front plate, may be formed with a punched-out tongue to the free end of which a retaining element for the battery is secured.
  • FIGURE 1 shows an embodiment of a stepping device
  • FIGURE 2 shows a part elevation of a clock movement with the lock gear according to FIGURE 1,
  • FIGURE 3 shows a further part elevation of the movement according to FIGURE 2
  • FIGURE 4 shows a part elevation corresponding to FIGURE 2 of a clock movement having a lock gear with teeth
  • FIGURE 5 shows an enlarged illustration of a part of the stepping wheel with the lock gear according to FIGURE 4.
  • FIGURE 6 shows an illustration of the stepping procedure of the stepping wheel by means of the stepping fork illustrated
  • reference numeral 210a designates a lock gear directly connected with the stepping wheel 21%; for example, the two wheels are in one piece. They are arranged on the shaft 218.
  • Reference numeral 210C designates the teeth of the lock gear, 210a and 210d designate the teeth of the stepping wheel 21012 which are stepped-on in known manner by means of the stepping fork 212 arranged on the balance staff 211.
  • the bent-over end 213a of the lock or click spring 213 engages in the toothing 2100 of the ratchet wheel 210a.
  • the teeth of the lock gear 210a are approximately triangular, so that the bent-over end 21312 of the lock spring 213 retains the stepping wheel 21Gb in a clearly defined inoperative position.
  • the end 2131) of the lock spring 213 remote from the lock gear 210a is fast in a cylinder 214 which is a friction fit on a stationary post 215.
  • the cylinder 214 is formed with a slot 214a for receiving a tool, for example a screwdriver with the aid of which the cylinder can be rotated on the stationary post 2 15.
  • a tool for example a screwdriver with the aid of which the cylinder can be rotated on the stationary post 2 15.
  • the position of the bent-over portion 213a of the lock spring 213 can be varied relatively to the lock gear 210a in the longitudinal direction of the lock spring, by which means the position of a tooth 210d of the stepping wheel 21Gb can be varied in the inoperative position of the ratchet wheel.
  • the adjustment is effected in such manner that the tooth of the stepping wheel 2101) located in the stepping fork 212 is so positioned that it does not scrape against the guides of the stepping fork.
  • the eccentric 216 is riveted, with friction, into the intermediate bridge 217 in such manner that it can be rotated with the aid of a screwdriver. With the aid of the said ececntric 216, the force with which the end 213a of the lock spring 213 bears against the lock gear 210a can be adjusted. The adjustment is effected in such manner that on the one hand the stepping Wheel 2101: is effectively locked in the inoperative position whereas on the other hand the oscillation of the balance is damped to the minimum extent.
  • the lock spring 213, the cross-section of which ispreferably rectangular, may 'be made of any desired metal material having resilient properties.
  • FIGURE 4 differs from that according to FIGURE 1 only with regard to the stepping wheel 220 with the lock gear 221, which is provided with a special toothing, as shown to an enlarged scale in FIGURE 5.
  • Reference numeral 220a designates the teeth of the stepping wheel, the pitch angle of which is designated beta.
  • the teeth of the lock gear 221 have a special shape, the front tooth flank in the rotation or stepping direction forming one plane, whereas the rear tooth flank 2 as seen in the stepping direction forms planes 221b and 221d which are inclined at an angle relatively to each other and meet at 2210. Thus, in its upper portion, this rear tooth flank forms a step which reliably prevents turning-back of the stepping wheel 220 or of the lock gear 221.
  • reference numeral 212 designates the fork plates and reference numerals 212a and 212b the stepping or lifting faces.
  • Reference numeral 220a designates the stepping Wheel teeth, shown in the position which they adopt in the inoperative position of the balance.
  • FIGURE 6 shows, in broken lines, further positions of the central stepping wheel tooth, as adopted thereby during the oscillation of the balance; however, the stepping Wheel teeth move in reality on the line II shown in FIGURE 6, during the movement of the stepping fork 212. In order to simplify the drawing, they are shown, in FIGURE 6, displaced with respect to the stepping fork 212.
  • the stepping wheel tooth 220a When the stepping fork 212 effects, out of the inoperative position, a movement through the angle a (approximately 17), the stepping wheel tooth 220a reaches the position 220a in which it contacts the stepping or lifting face 212a of the stepping fork 212. Up to this instant, the tip of the click spring 212 is in the tooth dedendum of the lock gear 220, as shown in full lines in FIGURE 5.
  • reference numeral 222 designates an arc of a circle showing the path of movement of the tip of the lock spring 213.
  • the shoulder 221b of therear (as seen in the stepping-on direction) tooth flank of the lock gear corresponds approximately to the shape of the arc of a circle 222; it may also be somewhat undercut, so that the tip of the lock spring 213, after sliding over one tooth addendum of the lock gear 221, immediately drops down on to the tooth flank or part 221d to position 213", shown in FIGURE 5, so that its tip is on the edge 221c.
  • the stepping wheel 220 is rotated further through a small angle into the position 220a shown in FIGURE 6.
  • the tip of the lock spring 213 slides on the tooth flank portion 221d but not quite as far as the dedendum 2212.
  • the remaining rotation of the stepping wheel 220 i.e. into the position 220a" of the stepping wheel tooth, is effected by the pressure of the click spring tip on the tooth flank portion 221d, until the tip of the lock spring has reached the tooth dedendum 221e.
  • the ratchet wheel tooth then adopts, as already explained, the position designated 220a" in FIGURE 6, in this way preventing abrasion of the stepping wheel teeth on the fork plates.
  • the pitch angle of the stepping wheel is designated [3.
  • the pitch angle of the lock gear is designated [3 It is half the size of the pitch angle ,8.
  • B is the angle of torque of the lock gear, produced by the lifting of the stepping fork when the latter moves through the angle (1 a is the remaining movement angle of the lock gear after which the lock spring 213 adopts the safety or Securing position.
  • Electric timekeeping mechanism with a driving balance and shaft which is kept oscillating by electromagnetic means comprising a branch'switch consisting of accelerating surfaces directed at an acute angle relative to the shaft and arranged on the balance shaft, adjoining safety surfaces directed perpendicularly in relation to the shaft, a stepping wheel moved on by one tooth division of the stepping wheel for each' half oscillation of the balance shaft, a lock gear for 'the' stepping wheel with double the number of teeth as compared to the stepping wheel, and a lock spring adjustable relative to its length and its pre-tension in relation to the lock gear and meshing with its free end with said teeth, whereby the teeth surfaces of the lock gear, which, relative to the direction of rotation are in back, form a shoulder and the profile of which corresponds approximately to the plane described by the point of the lock spring in its movement.
  • lock gear is formed with teeth which, on rearward rotation of the ratchet wheel forms a stop for the lock spring, and having an undercut surface.
  • lock gear is formed with teeth which, on rearward rotation of the lock gear forms a stop for the lock spring and having an undercut surface, and the tooth flank portion following the step in inclined relationship in such manner that the ratchet and with it the stepping wheel, is further-rotated by the pressure acting thereon of the spring tip, until the click tip has reached a tooth end.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
US471207A 1964-11-02 1965-07-12 Electrical clock movement Expired - Lifetime US3375653A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ26802A DE1281363B (de) 1964-11-02 1964-11-02 Fortschaltvorrichtung fuer den Antrieb des Raederwerkes einer Uhr

Publications (1)

Publication Number Publication Date
US3375653A true US3375653A (en) 1968-04-02

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ID=7202758

Family Applications (1)

Application Number Title Priority Date Filing Date
US471207A Expired - Lifetime US3375653A (en) 1964-11-02 1965-07-12 Electrical clock movement

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US (1) US3375653A (de)
DE (1) DE1281363B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908357A (en) * 1974-09-25 1975-09-30 Junghans Gmbh Geb Ratchet locking arrangement

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603370A (en) * 1924-04-03 1926-10-19 Wilcox Novelty Company Clock casing
FR666179A (fr) * 1927-06-21 1929-09-27 Ateliers Brillie Freres Sa Perfectionnements aux horloges à entretien électrique
CH165203A (fr) * 1932-10-31 1933-11-15 Colomb Henri Ressort avec porte-ressort.
US2590365A (en) * 1945-02-28 1952-03-25 Anderson Clare Oscillatory timing mechanism
US2800763A (en) * 1953-08-04 1957-07-30 Elgin Nat Watch Co Power take-off device with staggered ratchets
US2907810A (en) * 1956-02-07 1959-10-06 Hamilton Watch Co Battery holder for electric wrist watches
CH344371A (fr) * 1959-09-12 1960-01-31 Ebauches Sa Dispositif d'encliquetage
US2926534A (en) * 1956-12-31 1960-03-01 Hamilton Watch Co Index mechanism
FR1255852A (fr) * 1960-05-02 1961-03-10 Langendorf Watch Co Perfectionnements apportés aux montres électriques à ancre
US2981117A (en) * 1960-04-08 1961-04-25 Hamilton Watch Co Indexing mechanism for electrical timepieces
US2985705A (en) * 1957-10-23 1961-05-23 Hamilton Watch Co Battery clip
US3001305A (en) * 1959-01-12 1961-09-26 Sardeson Robert Pressing irons
US3090193A (en) * 1958-12-09 1963-05-21 Hamilton Watch Co Clock housing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1224395A (fr) * 1959-03-24 1960-06-23 Hatot Leon Ets Perfectionnements aux appareils magnétoélectriques applicables notamment aux montres électroniques
FR1255269A (fr) * 1960-04-28 1961-03-03 Hatot Leon Ets Perfectionnements apportés aux horloges, montres et autres appareils comportant des organes moteurs à mouvement alternatif
FR1297957A (fr) * 1961-06-13 1962-07-06 Klement Gottwald Uhren Und Mas Dispositif de contact pour horloges et autres appareils marchant en fonction du temps
DE1178794B (de) * 1963-03-27 1964-09-24 Kienzle Uhrenfabriken Ag Fortschaltvorrichtung bei direkt angetriebenem Schwingsystem

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603370A (en) * 1924-04-03 1926-10-19 Wilcox Novelty Company Clock casing
FR666179A (fr) * 1927-06-21 1929-09-27 Ateliers Brillie Freres Sa Perfectionnements aux horloges à entretien électrique
CH165203A (fr) * 1932-10-31 1933-11-15 Colomb Henri Ressort avec porte-ressort.
US2590365A (en) * 1945-02-28 1952-03-25 Anderson Clare Oscillatory timing mechanism
US2800763A (en) * 1953-08-04 1957-07-30 Elgin Nat Watch Co Power take-off device with staggered ratchets
US2907810A (en) * 1956-02-07 1959-10-06 Hamilton Watch Co Battery holder for electric wrist watches
US2926534A (en) * 1956-12-31 1960-03-01 Hamilton Watch Co Index mechanism
US2985705A (en) * 1957-10-23 1961-05-23 Hamilton Watch Co Battery clip
US3090193A (en) * 1958-12-09 1963-05-21 Hamilton Watch Co Clock housing
US3001305A (en) * 1959-01-12 1961-09-26 Sardeson Robert Pressing irons
CH344371A (fr) * 1959-09-12 1960-01-31 Ebauches Sa Dispositif d'encliquetage
US2981117A (en) * 1960-04-08 1961-04-25 Hamilton Watch Co Indexing mechanism for electrical timepieces
FR1255852A (fr) * 1960-05-02 1961-03-10 Langendorf Watch Co Perfectionnements apportés aux montres électriques à ancre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908357A (en) * 1974-09-25 1975-09-30 Junghans Gmbh Geb Ratchet locking arrangement

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Publication number Publication date
DE1281363B (de) 1968-10-24

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