US3057147A - Motion converter - Google Patents

Motion converter Download PDF

Info

Publication number
US3057147A
US3057147A US600922A US60092256A US3057147A US 3057147 A US3057147 A US 3057147A US 600922 A US600922 A US 600922A US 60092256 A US60092256 A US 60092256A US 3057147 A US3057147 A US 3057147A
Authority
US
United States
Prior art keywords
ratchet wheel
pawl
vibrator
engagement
timepiece
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
US600922A
Other languages
English (en)
Inventor
Hetzel Max
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.)
Bulova Watch Co Inc
Original Assignee
Bulova Watch Co Inc
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
Priority to CA601505A priority Critical patent/CA601505A/en
Priority to IT563090D priority patent/IT563090A/it
Application filed by Bulova Watch Co Inc filed Critical Bulova Watch Co Inc
Priority to US600922A priority patent/US3057147A/en
Priority to DEB42305A priority patent/DE1034551B/de
Priority to GB35040/56A priority patent/GB825233A/en
Priority to FR1172061D priority patent/FR1172061A/fr
Application granted granted Critical
Publication of US3057147A publication Critical patent/US3057147A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • 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
    • G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion

Definitions

  • the present invention relates to a motion converter. More particularly, the present invention relates to a motion converter capable of converting the oscillatory movement of a mechanical vibrator into rotary movement.
  • the motion converter may thus be used in a timepiece which includes a vibrator as well as suitable means for oscillating the same wherein the rotary movement obtained from the converter drives the timepiece mechanism.
  • the timepiece may be of the type disclosed in copending applications Serial No. 436,949 filed June 15, 1954, now abandoned, Serial No.
  • an electric timepiece which incorporates suitable electrical means for oscillating a mechanical vibrator, the latter preferably being in the form of a tuningfork type vibrator.
  • a reciprocatable drive element such as a pawl, is attached to one of the tines of the vibrator and cooperates with a ratchet wheel so as to cause rotation thereof during oscillation of the tines.
  • the pawl reciprocates with a stroke the length of which is dependent upon the amplitude of oscillation of the tines
  • the electrical means for oscillating the tines are capable of normally maintaining the amplitude of oscillation of the tines within a range wherein the stroke of reciprocation of the pawl, in a direction substantially tangent to the ratchet wheel at the point of contact or engagement between the pawl and the ratchet wheel, is at least as great as the pitch of the ratchet teeth but is not greater than twice this pitch.
  • each oscillation of the tines causes the ratchet wheel to be rotated throughout an angular distance which corresponds to the pitch of the ratchet teeth.
  • the rotational speed of the ratchet wheel is exactly proportional to the frequency of oscillation of the tines, and since the latter may be maintained constant with an extremely high degree of accuracy, the rotational speed of the ratchet wheel and of the timepiece mechanism, which it drives is similarly maintained constant with the same high degree of accuracy.
  • the pawl or other drive element includes a leaf spring which is attached at one of its ends to one of the tines of the vibrator and which at its other end, either directly or through the intermediary of an engaging element, contacts the ratchet teeth, so that when the pawl moves forwardly in one direction, it engages the ratchet wheel positively and causes the same to rotate in one angular direction, whereas when the pawl moves backwardly in the opposite direction it engages the ratchet wheel frictionally and causes, or at least tends to cause, the same to rotate in the opposite angular direction. It will be understood that if the pawl were permitted so to rotate the ratchet wheel in this opposite direction, the
  • tats ifiatent pawl might not, upon completing its backward stroke, come into engagement with the next ratchet tooth. Instead, the pawl might remain in engagement with the same tooth so that each reciprocation of the pawl would not necessarily result in the proper angular displacement of the ratchet wheel, thereby adversely affecting the accuracy of the timepiece.
  • the ratchet wheel although no longer subject to the driving action of the pawl, will tend to continue it rotation simply under the influence of its own inertia or momentum, as well as that of the timepiece mechanism which the ratchet wheel drives. If this were permitted to occur, successive reciprocations of the pawl would not necessarily find the same in engagement with successive ratchet teeth, thereby again adversely affecting the accuracy of the timepiece.
  • the objects of the present invention further include the provision of an extremely accurate timepiece which may readily be mass-produced at low cost.
  • the present invention mainly resides in that improvement in a timepiece inc0rporating a timepiece mechanism which includes a base, a timepiece mechanism actuator rotatably mounted on the base and operatively associated with the timepiece mechanism for actuating the same during rotation of the actuator in one angular direction, reciprocatable driving means for driving the actuator and cooperating therewith in such a manner that when the driving means moves in one direction it engages the actuator and causes the same to rotate in this one angular direction, and means for limiting rotation of the actuator to rotation in this one angular direction.
  • the last mentioned means limit rotation of the actuator to rotation in this one angular direction by the driving means during periods while the same is in motion-transmitting engagement with the actuators and also prevent rotation of the actuator in the opposite angular direction.
  • the acuator is a ratchet wheel and the driving means is a pawl, the latter cooperating with the former in such a manner that when the pawl moves forwardly in one direction, it engages the ratchet wheel positively and causes the same to rotate in the one angular direction.
  • the pawl moves backwardly in the opposite direction, it engages the ratchet wheel frictionally and causes the same to rotate in the opposite angular direction.
  • Brake means are provided which frictionally engage the ratchet wheel with a braking force which is sufficiently great to prevent rotation of the ratchet wheel in this opposite angular direction during backward movement of the pawl and which braking force is also sufliciently great to prevent rotation of the ratchet wheel in the one angular direction under the influence of its inertia after the pawl has completed its forward movement and commenced its backward movement.
  • the pawl is connected to a mechanical vibrator which is carried by the base and is oscillatable relative thereto about an axis of oscillation.
  • the pawl is attached to the vibrator at a point thereof that lies on a line which passes through the point of engagement between the pawl and the ratchet wheel and is normal to a line passing through this point of engagement and thr ugh the axis of oscillation.
  • the pawl reciprocates along a path which passes through the point of engagement between the pawl and the ratchet wheel, which path is substantially tangent to a circle having its center at the axis of oscillation and passing through this point of engagement.
  • FIG. 1 is a fragmentary view, partly in section, of one embodiment of a motion converter according to the present invention
  • FIG. 2 is a fragmentary view of a motion converter according to the present invention incorporating a modified pawl
  • FIG. 3 is a fragmeentary view of a motion converter according to the present invention incorporating another modified pawl;
  • FIG. 4 is a fragmentary perspective View of yet another pawl adapted to be used in a motion converter according to the present invention, the figure further showing a mounting arrangement by which the pawl can be secured to the tine of a tuning-fork type vibrator;
  • FIG. 5 is a fragmentary perspective view of a modified friction brake adapted to be used in a motion converter according to the present invention
  • FIG. 6 is a diagrammatic view of another modified friction brake adapted to be used in a motion converter according to the present invention.
  • FIG. 7 is a sectional view taken along line 1212 of FIG. 11;
  • FIG. 8 is a diagrammatic view of yet another modified friction brake adapted to be used in a motion converter according to the present invention, the view being taken along line 1313 of FIG. 14;
  • FIG. 9 is a sectional view taken along line 14-14 of FIG. 13;
  • FIG, 10 is a diagrammatic view of a still further modified friction brake adapted to be used in a motion converter according to the present invention.
  • FIG. 11 is a sectional view taken along line 16-16 of FIG.
  • FIG. 12 is a fragmentary view, partly in section, of yet another embodiment of a motion converter according to the present invention.
  • FIG. 13, 14 and 15 show different types of ratchet teeth shapes which the ratchet wheel may have.
  • FIG. 16 is a diagrammatic illustration of another feature of the present invention.
  • the oscillations of the tuning fork must, in order to be useful in a timepiece of the type described, be con- 4 verted into a rotary movement. This conversion can take place by the transmission or motion converter mechanism illustrated in FIG. 1.
  • the motion converter includes, a pawl constituted by a leaf spring 101 which is attached at one end thereof to the vibrator 102 (one tine of the tuning fork) and which engages at its other end the ratchet wheel 103, there being no separate tooth.
  • the braking means is constituted by a second leaf spring 104- one end of which is frictional engagement with an outer peripheral friction surface of a shaft 105 which is rotatable with the ratchet wheel 103.
  • the leaf spring 104 is secured at its other end to a member 106 of the timepiece base plate by means of a screw 107, and is arranged in a plane substantially normal to the plane of rotation of the ratchet wheel so that the pressure exerted by the free end of the leaf spring 1M is substantially perpendicular to the axis about which the ratchet Wheel 1103 and the shaft 105 rotate.
  • leaf spring 101 in the embodiment shown in FIG. 1 cooperates with the ratchet wheel in such manner that during each forward stroke of the pawl the vibrator, through the intermediary of this leaf spring, exerts a pushing force upon the particular ratchet tooth with which the leaf spring is in engagement
  • the leaf spring 201 shown in the embodiment of FIG. 2 has a hooked free end so that the vibrator 202 exerts a pulling force on the teeth of the ratchet wheel 203.
  • the leaf spring 301 carries at its free end a separate engaging element or tooth 301a which, as set forth above, may be a precious jewel.
  • the tooth may be wider than the leaf spring and project ahead of the latter, and be formed with a relative sharp edge 30117. If desired, a tooth of this type may be incorporated in a pawl device wherein the leaf spring has a hooked free end, as is shown in FIG. 2.
  • FIG. 4 differs from the above-described one in that the engaging tooth 401a carried by the leaf spring 401 is substantially blockshaped. Also, FIG. 4 shows how the leaf spring may be attached to the vibrator 402, the latter being formed with a relatively shallow bore which does not extend more than about one quarter of the way through the tine of the vibrator. The leaf spring 401 is soldered or otherwise attached to a mounting pin 4010 and this pin is inserted into the bore of the tine.
  • FIG. 5 is a fragmentary perspective of another embodiment of a friction brake arrangement according to the present invention. It differs from that shown in FIG. 1 in that the brake leaf spring 504 carries an engaging element 504a which frictionally engages an outer peripheral friction surface of the shaft 502 with which the ratchet Wheel (not shown) rotates.
  • the engaging element has an engaging surface which is curved about an axis transverse to the axis about which the shaft 502 rotates so that this engaging surface is in point contact frictional engagement with the shaft.
  • the ratchet wheel 603 rotates with a shaft 605 which has a free end face 605a.
  • the latter is frictionally engaged by the free end of the leaf spring 604 which at its other end is attached to a member 606 of the timepiece base plate by means of a screw 607.
  • the instant embodiment differs from the braking means shown above in that the leaf spring acting as the braking element does so on an end face of the shaft instead of a peripheral surface thereof.
  • FIGS. 8 and 9 show an embodiment of a friction brake arrangement wherein the ratchet wheel 703 is so shaped as to have an annular friction surface portion 703a shown in dot-and-dash lines in FIG. 8.
  • This friction surface portion may simply be part of one of the faces of the ratchet wheel 703 and thus lies in a plane transverse to the axis about which the ratchet wheel rotates.
  • the annular frictional surface is engaged by an engaging element or plunger 704a which is slidably arranged within a tubular guide element 707. The latter extends in a direction normal to the annular friction surface and is secured to a member 706 of the timepiece base plate.
  • a compression spring 704 is interposed between the plunger 704a and the member 706 and constantly urges the plunger into frictional engagement with the annular friction surface portion 703a.
  • the ratchet wheel 803 rotates together with a shaft 805 and, as in the above described embodiment, is so shaped as to have an annular friction surface portion 803a which may simply be part of the one of the ratchet wheel faces.
  • An annular engaging element 804a encompasses the shaft 805, is freely rotatable relative thereto and is arranged adjacent the ratchet wheel 803.
  • the engaging element 804a is pressed into face-to-face contact and thus into frictional engagement with the friction surface portion 803a by a leaf spring 804, the latter being formed with a'bifurcated free end portion the arms of which engage the element 804a on diametrically opposite points relative to the shaft 805.
  • the leaf spring 804 is attached at its other end to the timepiece base plate by means of a screw 807.
  • the ratchet wheel 903 which is driven by a pawl leaf spring 901 attached to the vibrator 902, cooperates with a second leaf spring 904 attached at one end to a member 90 6 of the timepiece base plate by means of a screw 907.
  • the leaf spring 904 is not only in friction engagement with the particular tooth with which it is in contact, but also acts as a pawl for preventing backward rotation of the ratchet wheel.
  • the teeth of the ratchet wheel may have any suitable configuration.
  • the teeth may have the rip-saw tooth configuration shown in FIG. 13, the V-shaped configuration shown in FIG. 14, or the undulatory configuration shown in FIG. 15.
  • FIG. 16 is a diagrammatic illustration of another feature of the present invention which incorporates a vibrator 1001.
  • the same maybe of the tuning-fork type having a base portion 1002 and a pair of tines 1003 and 1004 which may be vibrated in any suitable manner.
  • the vibration of each of the tines is in the nature of an arcuate oscillation about a corresponding nodal point in the stem of the fork, which point may be termed an axis of oscillation, the same being shown at 1003a and 1004a, respectively.
  • the tine 1004 carries a pawl 1005 cooperating with a ratchet wheel 1006' which is rotatable about an axis of rotation normal to the plane within which the tines 1003 and 1004 oscillate.
  • the pawl 1005 engages the ratchet wheel 1006 at a point a so as to rotate the same during oscillation of the tine 1004, and is attached to the tine 1004 at an attachment point 1004b, this point being so selected that it lies in a line b which passes through the point a and which is normal to a second line 0 that passes through the point a and through the axis of oscillation 1004a of the time 1004.
  • the tine 1004 is oscillated
  • the pawl 1005 is reciprocated along a path which passes through the point of engagement at and which is tangent to a circle d having its center at the axis of oscillation 1004a and passing through the point a.
  • the entire driving force of the vibrator is transmitted to the ratchet wheel 1006, thus permitting the vibrator operate at maximum efficiency.
  • This reduces the power required to drive the vibrator so that even a very small battery can for very long periods supply the timepiece with the necessary energy.
  • the path along which the pawl reciprocates should be inclined to a line tangent to the ratchet wheel at the point of engagement between the pawl and the ratchet wheel.
  • the vibrator 1001 and ratchet wheel 1006 are shown as being so arranged relative to each other that the line b, which is the path along which the pawl 1005 reciprocates, forms an angle 2 with a line 1 tangent to the ratchet wheel at the point a.
  • This angle e may be of the order of approximately 30.
  • the vibrator may have a configuration other than that illustrated in the instant application, and be shaped as is shown in copending application Serial No. 565,451.
  • the balance weight carried by one of the tines may be replaced by a magnetic drum similar to that carried by the other tine, in which event each magnetic drum cooperates with one of the two coils forming part of the electrical oscillating means, as disclosed in copending application Serial No. 570,958.
  • the abutment means which limit the maximum possible amplitude of oscillation may be constructed differentiy, for example, as disclosed in copending application Serial No. 570,958.
  • a timepiece incorporating a motion converter according to the present invention may be aranged as disclosed in copending application Serial No. 588,409.
  • the exact construction of the braking means need not be limited to those shown in the abovedescribed embodiments.
  • the leaf spring forming part of the brake may engage a separate friction wheel which rotates together with the ratchet wheel.
  • such leaf spring may, without acting as a pawl, engage the crests of the ratchet teeth which together form a discontinuous outer peripheral friction surface.
  • Ser No. 463,462 now abandoned, and to copending applications Serial No. 547,510 and Serial No. 580,813.
  • a timepiece having a timepiece mechanism, in combination, a base; ratchet wheel means rotatably mounted on said base and being operatively associated with said timepiece mechanism for actuating the same during rotation of said ratchet wheel means in one angular direction; pawl means for driving said ratchet wheel means and cooperating therewith in such a manner that 7 when said pawl means moves forwardly in one directionit engages said ratchet wheel means positively and causes the same to rotate in said one angular direction and that when said pawl means moves backwardly in the opposite direction it engages said ratchet wheel means frictionally and tends to cause the same to rotate in the opposite angular direction; a tuning fork vibrator carried by said base and having a tine connected to said pawl means for reciprocating the same during oscillation of said tine; said tine, said pawl means and said ratchet wheel lying in the same plane and braking means frictionally engaging said ratchet wheel means with a braking force which is sufficiently great to prevent
  • said pawl means include a leaf spring attached at one end thereof to said vibrator and engaging at the other thereof said ratchet wheel means.
  • said braking means include an engaging element mounted for movement in said direction normal to said annular friction surface portion of said ratchet wheel means and a spring constantly urging said engaging element into frictional engagement with said annular friction surface portion.
  • said braking means include a tubular guide element which is carried by said base and which extends in a direction normal to said annular friction surface portion and is in alignment therewith, an engaging element slidably arranged within said tubular guide element and adjacent said annular friction surface portion, and a compression spring interposed between said engaging element and said base and constantly urging said engaging element into frictional engagement with said annular friction surface portion.
  • said braking means include an annular engaging element adjacent said annular friction surface portion of said ratchet wheel means, and spring means constantly urging said engaging element into face-to-face contact and thus into frictional engagement with said annular friction surface portion.
  • ratchet wheel means is formed with ratchet teeth having a substantially V-shaped configuration.
  • a timepiece having a timepiece mechanism, in combination, a base; ratchet wheel means rotatably mounted on said base and being operatively associated with said timepiece mechanism for actuating the same during rotation of said ratchet wheel means in one angular direction; pawl means for driving said ratchet wheel means and cooperating therewith in such a manner that when said pawl means moves forwardly in one direction it engages said ratchet wheel means positively and causes the same to rotate in said one angular direction and that when said pawl means moves backwardly in the opposite direction it engages said ratchet wheel means frictionally and tends to cause the same to rotate in the opposite angular direction; a tuning fork vibrator carried by said base and having a tine connected to said pawl means for reciprocating the same during oscillation of said vibrator, said tine, said pawl means and said ratchet wheel lying in the same plane said tine being oscillatable about an axis of oscillation and said pawl means being attached to said tine at
  • a timepiece having a timepiece mechanism, in combination, a base; ratchet wheel means rotatably mounted on said base and being operatively associated with said timepiece mechanism for actuating the same during rotation of said ratchet wheel means in one angular direction; pawl means for driving said ratchet wheel means and cooperating therewith in such a manner that when said pawl means moves forwardly in one direction it engages said ratchet wheel means positively and causes the same to rotate in said one angular direction and that when said pawl means moves backwardly in the opposite direction it engages said ratchet wheel means frictionally and causes the same to rotate in the opposite angular direction; a tuning fork vibrator carried by said base and having a tine connected to said pawl means for reciprocating the same during oscillation of said vibrator, said tine, said pawl means and said ratchet wheel lying in the same plane, said tine being oscillatable about an axis of oscillation and said pawl means being attached to said tine at a
US600922A 1956-07-30 1956-07-30 Motion converter Expired - Lifetime US3057147A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA601505A CA601505A (en) 1956-07-30 Motion converter
IT563090D IT563090A (de) 1956-07-30
US600922A US3057147A (en) 1956-07-30 1956-07-30 Motion converter
DEB42305A DE1034551B (de) 1956-07-30 1956-10-29 Elektrische Uhr
GB35040/56A GB825233A (en) 1956-07-30 1956-11-16 Improvements in or relating to electric time-pieces
FR1172061D FR1172061A (fr) 1956-07-30 1956-12-03 Transformateur de mouvement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US600922A US3057147A (en) 1956-07-30 1956-07-30 Motion converter

Publications (1)

Publication Number Publication Date
US3057147A true US3057147A (en) 1962-10-09

Family

ID=24405608

Family Applications (1)

Application Number Title Priority Date Filing Date
US600922A Expired - Lifetime US3057147A (en) 1956-07-30 1956-07-30 Motion converter

Country Status (6)

Country Link
US (1) US3057147A (de)
CA (1) CA601505A (de)
DE (1) DE1034551B (de)
FR (1) FR1172061A (de)
GB (1) GB825233A (de)
IT (1) IT563090A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129554A (en) * 1961-03-06 1964-04-21 Suwa Seikosha Kk Electric timekeeper
US3169339A (en) * 1963-07-05 1965-02-16 Jerome D Ekstrand Deep water casting bobber
US3192417A (en) * 1963-07-16 1965-06-29 Hoover Co Synchronous electric motor
US3351788A (en) * 1966-02-01 1967-11-07 Movado Montres Apparatus for mechanically converting the oscillating movement of an electro-mechanical oscillator
US3670656A (en) * 1965-01-26 1972-06-20 Us Navy Fuze arming device
US4267740A (en) * 1978-09-14 1981-05-19 Bbc Brown, Boveri & Co., Ltd. Shaft-turning device
US4793199A (en) * 1985-12-19 1988-12-27 Messerschmitt-Bolkow-Blohm Gmbh Electromagnetic precision rotary drive

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH425640A (fr) * 1964-05-28 1966-08-15 Centre Electron Horloger Pièce d'horlogerie dont l'organe régulateur et moteur est constitué par un oscillateur mécanique
DE1287519B (de) * 1966-04-22 1969-01-16 Kienzle Uhrenfabriken Gmbh Vorrichtung zur Umwandlung der Schwingungen einer Stimmgabel in eine fortschreitende Drehbewegung
DE1298938B (de) * 1966-04-22 1969-07-03 Kienzle Uhrenfabriken Gmbh Vorrichtung zum Antrieb des Zeigerwerks einer Uhr von einem Schnellschwinger und Verfahren zur Montage dieser Vorrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1780194A (en) * 1929-05-03 1930-11-04 Phonodisc Corp Sound-reproducing machine
US1914215A (en) * 1931-05-06 1933-06-13 Gen Electric Dieect current timing device
FR767359A (fr) * 1933-04-10 1934-07-17 Appareil horaire synchrone
DE681623C (de) * 1934-10-06 1939-09-27 Landis & Gyr Ag Resonanzfederantrieb mit einem unmittelbar von der Resonanzfeder beeinflussten Triebzahnrad
US2545617A (en) * 1946-06-19 1951-03-20 Gen Time Corp Timer mechanism
IT526590B (it) * 1954-02-10 1955-05-18 Bulova Watch Co Inc Arpionismo atto a trasformare le vibrazioni di un vibratore meccanico in moto rotatorio per il comando di un meccanismo di orologeria
US2829740A (en) * 1955-09-08 1958-04-08 Hanes Hosiery Mills Company Brake means
US2949727A (en) * 1953-06-19 1960-08-23 Bulova Watch Co Inc Electric timepiece

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB156697A (en) * 1920-01-08 1922-04-07 Charles Jean Victor Fery Improvements in electro-magnetic clocks
US1839215A (en) * 1931-03-18 1932-01-05 Arthur K Kempton Electric clock
DE840974C (de) * 1950-05-14 1952-06-09 Manfred Szyszka Unruhuhr mit Gleichstromantrieb
CH296731A (fr) * 1952-04-07 1954-02-28 Rolex Montres Montre électrique.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1780194A (en) * 1929-05-03 1930-11-04 Phonodisc Corp Sound-reproducing machine
US1914215A (en) * 1931-05-06 1933-06-13 Gen Electric Dieect current timing device
FR767359A (fr) * 1933-04-10 1934-07-17 Appareil horaire synchrone
DE681623C (de) * 1934-10-06 1939-09-27 Landis & Gyr Ag Resonanzfederantrieb mit einem unmittelbar von der Resonanzfeder beeinflussten Triebzahnrad
US2545617A (en) * 1946-06-19 1951-03-20 Gen Time Corp Timer mechanism
US2949727A (en) * 1953-06-19 1960-08-23 Bulova Watch Co Inc Electric timepiece
IT526590B (it) * 1954-02-10 1955-05-18 Bulova Watch Co Inc Arpionismo atto a trasformare le vibrazioni di un vibratore meccanico in moto rotatorio per il comando di un meccanismo di orologeria
US2829740A (en) * 1955-09-08 1958-04-08 Hanes Hosiery Mills Company Brake means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129554A (en) * 1961-03-06 1964-04-21 Suwa Seikosha Kk Electric timekeeper
US3169339A (en) * 1963-07-05 1965-02-16 Jerome D Ekstrand Deep water casting bobber
US3192417A (en) * 1963-07-16 1965-06-29 Hoover Co Synchronous electric motor
US3670656A (en) * 1965-01-26 1972-06-20 Us Navy Fuze arming device
US3351788A (en) * 1966-02-01 1967-11-07 Movado Montres Apparatus for mechanically converting the oscillating movement of an electro-mechanical oscillator
US4267740A (en) * 1978-09-14 1981-05-19 Bbc Brown, Boveri & Co., Ltd. Shaft-turning device
US4793199A (en) * 1985-12-19 1988-12-27 Messerschmitt-Bolkow-Blohm Gmbh Electromagnetic precision rotary drive

Also Published As

Publication number Publication date
GB825233A (en) 1959-12-09
FR1172061A (fr) 1959-02-05
DE1034551B (de) 1958-07-17
CA601505A (en) 1960-07-12
IT563090A (de)

Similar Documents

Publication Publication Date Title
US3057147A (en) Motion converter
US3204133A (en) Electric reciprocating drive with motion conversion
CN106557009B (zh) 具有旋转制动器的振荡器
US2960817A (en) Electrical timepiece
CN104011608B (zh) 擒纵机构
US2481213A (en) Escapement mechanism
US3070951A (en) Frequency-adjustable tuning fork type vibrator for an electrically energized timepiece
US2800763A (en) Power take-off device with staggered ratchets
US3377874A (en) Motion converter
US3469462A (en) Pawl and ratchet mechanism driven by vibratory means
US3107481A (en) Timing device utilizing a mechanism
US3609958A (en) Magnetic device for transforming an oscillatory motion into a rotary motion
US3129554A (en) Electric timekeeper
US2178243A (en) Film feeding device
US3425210A (en) Stepping device for tuning fork oscillator
US2536615A (en) Automatic winding mechanism for watch movements
US3975962A (en) Click work for a watch movement
US2897680A (en) Driving mechanism for an index wheel
US3440813A (en) Electromagnetic vibrator
US3670493A (en) Indexing mechanism for electric/electronic timepieces
US3086402A (en) Self-winding mechanism for timepieces
US3017742A (en) Escapement for a time rate mechanism
US11927917B2 (en) Mechanical horological movement provided with an escapement comprising an anchor
US2363993A (en) Escapement
US3631669A (en) Synchronizable clock