US3796041A - Reset mechanisms - Google Patents

Reset mechanisms Download PDF

Info

Publication number
US3796041A
US3796041A US00279401A US3796041DA US3796041A US 3796041 A US3796041 A US 3796041A US 00279401 A US00279401 A US 00279401A US 3796041D A US3796041D A US 3796041DA US 3796041 A US3796041 A US 3796041A
Authority
US
United States
Prior art keywords
striker
support member
cam
reset
support
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
US00279401A
Other languages
English (en)
Inventor
C Boult
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Application granted granted Critical
Publication of US3796041A publication Critical patent/US3796041A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters

Definitions

  • ABSTRACT A reset mechanism for a stop-watch is operable to ro tate two cams on the staves of the minute and second hands respectively of the watch, back into datum angular positions. Depression of a reset button of the mechanism actuates an operating lever that engages with a cam surface of a pivotally-mounted supportmember to pivot the support member towards the cams against the action of a spring.
  • a striker of unitary construction and having camming surfaces for engaging the cams is pivotally mounted on the support member but is restrained from more than small angular displacement relative to the support member by a pin which from the striker member engages in an oversized hole in the support member. Pivoting of the support-member carries the striker to bring its two camming-surfaces into engagement with .the two cams respectively, the loose mounting of the striker on the support member permitting it limited adjustment of orientation relative to the support-member to ensure that the camming surfaces are both brought into positive engagement with their respective cams.
  • the striker is constrained to movement along a path which is defined by a slot in the base plate of the mechanism and which is spaced from the support-member pivot, the slot being engaged by a pin which is carried on the striker and which is spaced from the pivot of the striker with the support member.
  • One form of reset mechanism in common use at present provides a cam-piece which when released is operable under the influence of a spring to cooperate with cams mounted on the staves of the hands of the watch to return those hands to a datum position.
  • a reset mechanism comprises a striker member which is loosely mounted on a movably-mounted support member and which has a camming surface for engaging a reset cam of the mechanism for resetting the cam to a datum position, and operating means which is actuable to engage with the support member and to cause it to move such that the camming surface of the strikermember engages the reset cam to reset it to its datum position.
  • One advantage of the invention over the prior proposals is that the various parts of the reset mechanism may be manufactured to a lesser (or at least the same) degree of accuracy than has heretofore been necessary.
  • Another advantage resulting from the same feature of the invention is that the loose coupling between striker and support members permits their assembly very cheaply and quickly.
  • the stop-watch is described, by way of example only, with reference to the accompanying drawings, which show in FIGS. 1 and 2 respectively the watch before and after resetting of the hands.
  • the casing 9 of the watch carries a movement of which only one mounting plate 10 is shown.
  • a winder-reset button 12 is carried by the movement and extends through a hole in the casing 9.
  • a stop-start button 13 is mounted on the movement to extend through a hole in the casing 9 .
  • the button 13 may operate as described in my copending U. 5. Pat. application Ser. No. 279,400, filed Aug. 10, 1972, in starting and stopping operation of the watch.
  • the reset button 12 includes a knurled winder knob 14 and stem 15.
  • the stem 15 connects to the movement of the watch and may be operated to wind-up the mainspring of the watch in any well known way.
  • a flange 17 which is formed integrally with the stem 15 engages a boss 18 formed of an operating lever 19 pivotally mounted at one end, 20, on the plate 10.
  • the operating lever 19 carries a shouldered stud 21 located in a slot 22 formed in the mounting plate 10.
  • the mounting plate 10 also carries an arcuate support member 23 pivotally mounted at one end 24.
  • the striker member 28 is constrained to follow a predetermined path relative to the mounting plate 10 during movement of the support member 23. This path is defined by a slot 30 in the plate 10, and is followed by a pin member 29 that is carried by the striker member 28 to engage with the slot 30.
  • the other end of member 23 is formed with a camming surface 26 and pivotally supports, at 27, a striker member 28.
  • the striker 28 is formed with two camming surfaces 31 and 32 which are engageable respectively with two reset earns 33 and 34.
  • the cams 33 and 34 are rigidly mounted on the staves carrying the minute and second hands of the watch.
  • a pin or half-sheered dowel in striker 28 engages loosely in a hole 35 in the arcuate support member 23 so that striker 28 is free to rotate through a small angle about its pivotal support 27.
  • a spring 36 is provided to bias the arcuate support member away from thecams 33 and 34 as shown.
  • the floating feature of striker 28 provided by the loose mounting of the striker 28 on the support member 23, and acting within the constraint imposed by engagement of the pin 29 in the slot 30, ensures that cams 33 and 34 are returned to zero accurately and variations in manufacturing accuracies and finish are compensated for;
  • the surfaces 31 and 32 and the faces of the cams 33 and 34 which they engage may be flat, as shown, or curved. In this latter respect the faces 31 and 32 are preferably convex and the faces on the .camsshaped to conform with them.
  • the cam shaping facilitates return of each cam to its zero, datum position through the shortest available angular path when acted upon by the striker 28.
  • Means may be provided, associated with the stopstart mechanism for preventing operation of the reset mechanism while the hands of the watch are in motion.
  • a reset mechanism comprising a base member, a
  • reset cam which is mounted on the said base member for angular movement into a datum angular position with respect to said base member, a support member, pivot means pivotally mounting said support member on said base member for movement relative to said cam, a striker member, further mounting means loosely mounting said striker member on the support member,
  • a reset mechanism according to claim 1 in which said means interconnecting said striker and base members comprises a pin element carried by one of said striker and base members to engage in a slot in the other of the said striker and base members.
  • a reset mechanism as claimed in claim 1 in which said further mounting means comprises means pivotally mounting the striker member on the support member, and means to restrain said striker member from substantial pivotal movement relative to the support member when the striker member is brought into said engagement with said cam.
  • a reset mechanism according to claim 4 in which said means to restrain said striker member comprises a pin element carried by one of the siad striker and support members to engage in an aperture in the other of said striker and support members.
  • a reset mechanism comprising a base plate, a reset cam mounted on the staff of a hand of the stop-watch and movable angularly to a datum angular position with respect to the base plate to reset the said hand of the stop watch, a support member, pivot means pivotally mounting said support member on said base plate for movement relative to said base plate and said cam, a striker member, further mounting means loosely mounting said striker member on the support member, .the striker member having a camming surface for effecting engagement with the said cam to displace said cam angularly into said datum angular position,
  • operating means actuable to engage with the support member to move it to bring the said striker member into said engagement with the cam so as to reset the cam to its said datum angular position, and means interconnecting said striker member and the said base plate to constrain the said striker member to follow a predetermined path relative to the said base plate, and thereby to said cam, during said movement of the support member, said base plate having a slot therein that is spaced from said pivot means to define said path, and said interconnecting means comprising an element carried by said striker member to engage in said slot throughout said movement of the support member, said element being spaced on said striker member from the said further mounting means.
  • a reset mechanism comprising: a base member; a pair of reset cams mounted respectively on the staves of the minute and second hands of the watch, said cams being movable angularly with respect to said base member into respective datum angular positions to reset the hands of the stop watch; a support member; mounting means pivotally mounting said support member on said base member for movement relative to the said pair of cams; a unitary striker member loosely mounted on the support member, the striker member comprising two camming surfaces each for effective engagement with a respective one of said pair of reset cams, and means rigidly interconnecting the two camming surfaces with one another as a unitary whole; operating means actuab'le to engage with the support member to move it to bring the said striker member into said engagement with the said pair of reset cams so as to reset the said pair of cams to their respective datum positions; and'means interconnecting the striker member with the base member to constrain the striker member to follow a predetermined path relative to the

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Lock And Its Accessories (AREA)
US00279401A 1971-08-20 1972-08-10 Reset mechanisms Expired - Lifetime US3796041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3908771A GB1405101A (en) 1971-08-20 1971-08-20 Reset mechanisms for use in stopwatches

Publications (1)

Publication Number Publication Date
US3796041A true US3796041A (en) 1974-03-12

Family

ID=10407561

Family Applications (1)

Application Number Title Priority Date Filing Date
US00279401A Expired - Lifetime US3796041A (en) 1971-08-20 1972-08-10 Reset mechanisms

Country Status (9)

Country Link
US (1) US3796041A (xx)
JP (1) JPS5613273B2 (xx)
AT (1) AT333669B (xx)
AU (1) AU468533B2 (xx)
CA (1) CA964472A (xx)
CH (2) CH1227272A4 (xx)
DE (1) DE2240081A1 (xx)
FR (1) FR2150387B1 (xx)
GB (1) GB1405101A (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901020A (en) * 1973-04-06 1975-08-26 Valjoux Sa Chronograph watch
US20040052162A1 (en) * 2002-07-11 2004-03-18 Takashi Takahashi Mechanical chronograph timepiece
US20040246820A1 (en) * 2001-09-24 2004-12-09 Johnny Girardin Chronograph mechanism
EP1746471A1 (fr) * 2005-07-20 2007-01-24 Breitling AG Dispositif de remise à zéro de deux compteurs de temps
EP1791042A1 (fr) * 2005-11-24 2007-05-30 Vaucher Manufacture Fleurier SA Marteau pour pièce d'horlogerie
US20090086583A1 (en) * 2007-10-02 2009-04-02 Omega Sa Zero reset device for two time counters
USD783576S1 (en) * 2015-12-30 2017-04-11 Oculus Vr, Llc Earbud connector plate
USD783578S1 (en) 2015-12-30 2017-04-11 Oculus Vr, Llc Earbud
USD787480S1 (en) 2015-12-30 2017-05-23 Oculus Vr, Llc Pair of earbud tips
US11910968B2 (en) 2021-11-15 2024-02-27 Cleana Inc. Self-lifting toilet seat
US11950733B2 (en) 2022-08-04 2024-04-09 Cleana Inc. Self-lowering toilet seat system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153229A (ja) * 1985-12-27 1987-07-08 Nippon Oil Co Ltd 皮膚マ−カ−
JPH034193A (ja) * 1989-05-31 1991-01-10 Sumitomo Rubber Ind Ltd 有効時間表示方法及び装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641899A (en) * 1950-07-31 1953-06-16 Jeanneret & Co R Chronograph setting hammer system
US3495397A (en) * 1967-06-14 1970-02-17 Valjoux Sa Return to zero mechanism of two chronograph counters
US3518826A (en) * 1967-08-21 1970-07-07 Seiko Instr & Electronics Return mechanism for stopwatches

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641899A (en) * 1950-07-31 1953-06-16 Jeanneret & Co R Chronograph setting hammer system
US3495397A (en) * 1967-06-14 1970-02-17 Valjoux Sa Return to zero mechanism of two chronograph counters
US3518826A (en) * 1967-08-21 1970-07-07 Seiko Instr & Electronics Return mechanism for stopwatches

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901020A (en) * 1973-04-06 1975-08-26 Valjoux Sa Chronograph watch
US20040246820A1 (en) * 2001-09-24 2004-12-09 Johnny Girardin Chronograph mechanism
US6926438B2 (en) * 2001-09-24 2005-08-09 Girard-Perregaux Sa Chronograph mechanism
US20040052162A1 (en) * 2002-07-11 2004-03-18 Takashi Takahashi Mechanical chronograph timepiece
US7331706B2 (en) 2005-07-20 2008-02-19 Breitling Ag Zero-resetting device for two time counters
EP1746471A1 (fr) * 2005-07-20 2007-01-24 Breitling AG Dispositif de remise à zéro de deux compteurs de temps
US20070019509A1 (en) * 2005-07-20 2007-01-25 Breitling Ag Zero-resetting device for two time counters
JP2009517645A (ja) * 2005-11-24 2009-04-30 ヴォーチェ マニファクチュール フルリエール エス．アー． タイムピースのリセットハンマー
WO2007060152A3 (fr) * 2005-11-24 2007-08-30 Vaucher Mft Fleurier Sa Marteau pour piece d'horlogerie
WO2007060152A2 (fr) * 2005-11-24 2007-05-31 Vaucher Manufacture Fleurier S.A. Marteau pour piece d'horlogerie
US20080291785A1 (en) * 2005-11-24 2008-11-27 Laurent Perret Timepiece Hammer
EP1791042A1 (fr) * 2005-11-24 2007-05-30 Vaucher Manufacture Fleurier SA Marteau pour pièce d'horlogerie
US7553067B2 (en) 2005-11-24 2009-06-30 Vaucher Manufacture Fleurier S.A. Timepiece Hammer
CN101313258B (zh) * 2005-11-24 2010-11-03 弗勒里耶沃谢制造股份有限公司 钟表锤
US20090086583A1 (en) * 2007-10-02 2009-04-02 Omega Sa Zero reset device for two time counters
US7871197B2 (en) * 2007-10-02 2011-01-18 Omega Sa Zero reset device for two time counters
USD783576S1 (en) * 2015-12-30 2017-04-11 Oculus Vr, Llc Earbud connector plate
USD783578S1 (en) 2015-12-30 2017-04-11 Oculus Vr, Llc Earbud
USD787480S1 (en) 2015-12-30 2017-05-23 Oculus Vr, Llc Pair of earbud tips
USD819604S1 (en) 2015-12-30 2018-06-05 Oculus Vr, Llc Earbud connector plate
USD834561S1 (en) 2015-12-30 2018-11-27 Oculus Vr, Llc Earbud
USD840979S1 (en) 2015-12-30 2019-02-19 Facebook Technologies, Llc Pair of earbud tips
US11910968B2 (en) 2021-11-15 2024-02-27 Cleana Inc. Self-lifting toilet seat
US11950733B2 (en) 2022-08-04 2024-04-09 Cleana Inc. Self-lowering toilet seat system

Also Published As

Publication number Publication date
FR2150387A1 (xx) 1973-04-06
DE2240081A1 (de) 1973-02-22
AT333669B (de) 1976-12-10
JPS5613273B2 (xx) 1981-03-27
AU468533B2 (en) 1976-01-15
AU4576472A (en) 1974-02-21
GB1405101A (en) 1975-09-03
FR2150387B1 (xx) 1976-03-12
JPS4830463A (xx) 1973-04-21
CA964472A (en) 1975-03-18
CH1227272A4 (xx) 1976-09-15
ATA707272A (de) 1976-03-15
CH585432B5 (xx) 1977-02-28

Similar Documents

Publication Publication Date Title
US3796041A (en) Reset mechanisms
US7959350B2 (en) Chronograph
US4247933A (en) Time striking device for timepiece
US3495397A (en) Return to zero mechanism of two chronograph counters
US3866407A (en) Stem locking mechanism for electric calendar watches
US3127733A (en) Drowse alarm mechanism
US3495396A (en) Numerically indicating timekeeper and timer
US2512088A (en) Chronograph
US3739570A (en) Column-wheel timer
US3667126A (en) Device for locking a rotatable drawing head
US3712036A (en) Cam wheel mechanism for watches
US3827235A (en) Winding and setting mechanism for watches
US4112673A (en) Operating mechanism for mechanical watch movement
US3733802A (en) Alarm device
US3643422A (en) Chronograph movement
US4445783A (en) System for the control of a wheel for driving in rotation a chronograph hand
US2913048A (en) Timer
US3762156A (en) Time-piece
US3701250A (en) Adjustable return mechanism for a watch
US3034280A (en) 24-hour time alarm
GB1347938A (en) Start/stop mechanism for a balance wheel
GB709774A (en) Timepiece movement, with an automatic winding mechanism comprising a lockable oscillating weight
US990465A (en) Alarm-clock.
GB1347024A (en) Centre seconds hand timepiece
JPS6020063Y2 (ja) 時計の停止装置