US3884033A - Switch for electronic watch - Google Patents

Switch for electronic watch Download PDF

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Publication number
US3884033A
US3884033A US407147A US40714773A US3884033A US 3884033 A US3884033 A US 3884033A US 407147 A US407147 A US 407147A US 40714773 A US40714773 A US 40714773A US 3884033 A US3884033 A US 3884033A
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United States
Prior art keywords
disk
terminals
switch
timepiece
sheet
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
US407147A
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English (en)
Inventor
John R Wood
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.)
American Microsystems Holding Corp
Original Assignee
American Microsystems Holding Corp
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 American Microsystems Holding Corp filed Critical American Microsystems Holding Corp
Priority to US407147A priority Critical patent/US3884033A/en
Priority to CA201,453A priority patent/CA995471A/en
Priority to GB2846774A priority patent/GB1446374A/en
Priority to FR7424423A priority patent/FR2257992B3/fr
Priority to JP49117786A priority patent/JPS5063971A/ja
Priority to FR7502795A priority patent/FR2257938A1/fr
Priority to US05/560,824 priority patent/US3934401A/en
Application granted granted Critical
Publication of US3884033A publication Critical patent/US3884033A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G04C3/001—Electromechanical switches for setting or display
    • G04C3/005—Multiple switches

Definitions

  • a multi-position switch particularly adaptable for an electronic watch comprises a movable plate or disk mounted within a cup-like body and rotatable about an axis to different positions for accomplishing various setting or operating modes.
  • Fixed contacts on the inside of the switch plate are spaced apart but electrically connected so that when the plate is rotated to certain positions relative to its central axis the contacts are aligned for engagement with a particular pair of a series of terminals located on the inside planar surface of the switch body and connected through the body to the internal circuitry of the device.
  • the interconnection of certain pairs of terminals accomplished by the contacts activates internal circuitry of the device to produce the desired operating function or mode.
  • This invention relates to a multi-position switch and more particularly to a switch that is well adapted for use with an electronic watch or some other relatively small electronic device.
  • One well known form of electronic watch generally comprises a crystal oscillator, and integrated circuit semi-conductor device providing the counter and driving circuitry, a coil, a battery and a digital display.
  • a switching means is required in order to set the watch display to the proper time as when the battery is replaced.
  • one setting switch commonly used for such watches was a standard rotary electronic switch with a stern and crown drive. This switch was relatively bulky in size and had to be accommodated inside the watch case with the other components, thereby contributing substantially to the total space required within the watch case.
  • the present invention provides a multiposition switch for electronic watches that solves this space problem.
  • Another form of setting means commonly used for watches was two push button switches. However, these were expensive to incorporate in a watch structure as well as being awkward to operate.
  • my switch comprises a disk or plate located within a shallow cup-like switch body located on the back of the watch case rather than inside of the case. This disk is retained so as to be rotatable about its central axis to any preselected position, and on its inside surface are projections forming electrical contacts. On the inside-planar surface of the switch body are a plurality of spaced apart electrical terminals connected to conductors of a predetermined shape and these termi-.
  • nals extend through the switch body to the appropriate electronic circuit components within the watch case.
  • the contacts on the back of the disk are so spaced and arranged that in various rotational positions of the disk certain of the contacts will be aligned with and contact certain combinations of the electronic terminals.
  • the aligned contacts and terminals engage to provide electrical continuity between the engaged terminals, thereby activating the internal circuitry connected thereto to produce the desired function.
  • the different rotational positions marked on the back of the watch case indicate when the contacts will be aligned with the terminals for causing the hour display to advance, the minute display to advance, or to hold the display or to merely run in its normal operating mode.
  • Another object of the present invention is to provide a controllable multi-position switch for electronic watches that is located outside of the interior cavity formed by the watch case, thereby providing more space within the case for the other essential watch components.
  • Another object of my invention is to provide a multiposition switch for electronic watches that eliminates the need for a turnable stern that projects outwardly from the case of the watch.
  • Yet another object of the present invention is to provide a controllable switch for electronic watches that is easy to operate, yet one that is relatively more reliable and trouble free than conventional watch switches and not easily operated inadvertently or damaged by extraneous forces that may be applied to the watch.
  • Still another object of the present invention is to provide a controllable multi-position switch particularly adaptable for electronic watches which can be economically manufactured with a high degree of precision.
  • FIG. 1 is an enlarged front view of an electronic watch embodying the principles of the present invention
  • FIG. 2 is an enlarged rear view of the watch of FIG.
  • FIG. 3 is a furtherenlarged plan view showing the general layout of components for the watch of FIGS. 1 and 2 before they are installed in the case;
  • FIG. 4 is a view in section taken along line 44 of FIG. 3;
  • FIG. 5 is a view in section taken along line 55 of FIG. 3;
  • FIG. 6 is a further enlarged view in section of the entire watch of FIGS. 1 and 2 taken along line 66 of FIG. 2;
  • FIG. 7 is a greatly enlarged fragmentary view in section showing the switch for the watch of FIGS. 1 and 2 according to the invention.
  • FIG. 8 is a view taken along line 88 of FIG. 7 showing the relative location of the contact points and terminals for the switch in one operating position with other operating positions shown in phantom;
  • FIG. 9 is a view in section similar to FIG. 7 showing another form of switch according to my invention.
  • FIG. 10 is a view in section taken along line 10-10 of FIG. 9
  • FIG. 11a is a view in section of still another form of my switch having a push-in connect feature
  • FIG. 11b is a view similar to FIG. lIa showing the i switch in the activated position.
  • FIG. 12 is a view in section taken along line 12l2 of FIG. 11a.
  • FIG. 2 shows the rear case plate 16 for the watch within which is mounted a switch 18 embodying the principles of the present invention. As shown, the rear plate is marked with appropriate indicia at circumferential locations around the switch to show the various positions for setting the hour display (HRS), the minute display (MIN), and for the hold and run positions. These are the normal setting functions that heretofore were accomplished by a standard stern and crown drive connected to a conventional rotary electronic switch located inside of the watch case.
  • FIGS. 3 are enlarged views showing the arrangement of the various interconnected watch components for an electronic watch that must be packaged together and housed within the case 12.
  • the package is extremely compact and includes a substrate or mounting board 20 of ceramic or plastic material having a generally rectangular shape with a recess 22 on its planar top surface within which is mounted an integrated circuit semi-conductor device 24 comprising the clock logic and drive circuitry.
  • Conductive paths 26 formed on the top surface of the substrate using standard printed circuit techniques extend to a series of connection pads 28 at one end thereof.
  • a cover 30 fits over the recess 22 and the integrated circuit device 24 therein and is secured, as by bonding, to the substrate 20.
  • a spacer 32 made of a suitable dielectric material is located around or at opposite ends of the cover and hasthe same thickness.
  • the digital display package 14 which is preferably one using a so-called liquid crystal material. Since the construction of such display devices is well known to those skilled in the art it need not be described here.
  • Adjacent to one end of the display is another recess 36 in the substrate which is open on its bottom or back side, and within this recess is the battery 38 for the watch.
  • all of the essential components of the electronic watch system except the switch may be packaged as one internal assembly and these components are electrically interconnected by suitable conductors (not shown) using conventional interconnect techniques such as printed circuit conductors on the substrate with appropriate soldered or bonded connections and terminals.
  • the circuitry When the set hours or set minutes positions are activated the circuitry will advance the hour or minute portion of the display until the desired digits are displayed at which point the switch may be disconnected.
  • the hold position the display is essentially disconnected so that it will remain on one indication until a synchronizing point is reached at which time the hold is released and the display commences to advance normally.
  • the run position is for the normal operating mode for the watch circuit.
  • theinternal components package 20 is shown installed within the case 12, as in a typical watch installation.
  • a lens 52 at the front of the watch may be retained against the edges 54 of an opening in the front of the case 12 by a generally annular internal face plate 56.
  • the components package is supported within the case such as by fasteners (not shown) so that the display 14 is properly positioned in back of the lens.
  • the back case plate 16 containing the switch 18 has an edge 58 that may be retained by a pressed fit along a complementary edge of the case sidewall.
  • a removable cover member 60 is provided in the back case plate for access to the battery 38.
  • the switch 18 is made as a separate subassembled unit and is installed within an opening in the back case plate 16. It may be held in place by any suitable means such as epoxy adhesive 64 preferably placed around the inside edge of the opening.
  • the switch comprises a cup-shaped body that may be formed from some suitable material such as beryllium copper and it has a generally planar bottom side 66 with a uniform, integral sidewall 68.
  • Supported within the switch body is an actuator disk 70 which may be formed from a rigid, preferably non-magnetic metal such as stainless steel.
  • This disk has a recess around its upper edge forming a circular shoulder 72 and extending diametrically across its top surface is a slot 74 capable of receiving the edge of a suitable turning instrument such as a coin.
  • a pair of spaced apart projections 76 which serve to retain and position a conductive wiper member 78 on the disk.
  • the wiper member may be in the form of a thin sheet of metal and has a pair of contact members 80 and 82 that are bent downwardly from the underside of the disk 72 which are spaced 180 apart.
  • At the outer edge of the wiper member are radially extending portions 84 which provide contacts with the cup-like body member.
  • these edge portions are also bent downwardly to engage the bottom inner surface of the body bottom 68 just inside of its sidewall. Since the contact members 80 and 82 are all part of the wiper member and integral with the portions 84 they are also ground contacts.
  • the disk is held within the body member by an upper edge flange 86 of the sidewall which is bent inwardly over an annular gasket member 88 that fits within the peripheral recess of the disk on the shoulder 72 formed thereby.
  • This seal is preferably made of some nonconductive material that affords a minimum amount of frictional resistance to the actuator disk 72, such as a polytetrafluoroethylene material.
  • the disk may be rotatable within the body member by a suitable instrument inserted within the disk slot 76.
  • a thin dielectric sheet 90 Fixed to the inside bottom surface of the switch body is a thin dielectric sheet 90 having on it a pair of terminal areas 92 and 94 each having a predetermined size and shape and formed from a layer of conductive metal. These conductive areas surround a pair of spaced apart terminals 96 and 98 which extend above insulated feedthroughs 100 and 102 located in the bottom of the switch body and are connected to the leads 46 and 48 extending into the feed-throughs.
  • the internal circuitry of the watch or the device being controlled is provided with a relatively large pullup resistor.
  • the conductive areas around their respective terminals are shaped so that they may be contacted by one wiper contact in various rotational positions of the actuator disk. Assuming that the terminals are located on a diametral line on the circular sheet 90 extending through the 9200,0c1ock and 3:00 oclock points, (assuming that the bottom surface of the watch body is a clock face) the area 92 connected to the terminal 96 extends to the 8:00 oclock and 11:00 oclock positions.
  • the area 94 connected to the terminal 98 extends to the 4:00 oclock and 5:00 oclock positions.
  • the terminals 96 and 98 are spaced closer to the center axis of the sheet 90 than are the contacts 80 and 82 on the wiper 78.
  • both of the terminals are kept at the electrical state (negative) which allows the logic circuit to run in its normal operating mode.
  • the actuator disk is turned to the Hold position, the contacts 80 and 82 of the wiper are at the 10:00 oclock and 4:00 oclock positions on the sheet 90.
  • FIGS. 9 and 10 show another form of rotary switch 18a embodying the principles of my invention wherein four terminals instead of two are provided within the switch.
  • one terminal 96.connected to the logic circuitry is centrally located and the other three terminals are spaced equally from it and 120 apart, one of this embodiment, no pullup resistors are required for the internal circuitry and no continuous ground contact between the case and the disk must be made, as by the extended wiper portions 84.
  • the switch 18a could be made as a separate unit similar to the switch 18, but as shown in FIG. 9, it may also be made with a body that is integral with a back cover plate 16a of the watch case.
  • the switch body is formed as a circular cuplike recess which extends inwardly from the cover plate.
  • An actuator disk a is retained within the recess and held against an annular non-conductive spacer 11 l by a split retaining ring 112 which is seated in a groove in the wall 114 of the recess.
  • the actuator disk has a peripheral shoulder 72a which retains a nonconductive gasket member 88a that fits under the ring 112.
  • the disk 700 has a transverse open slot 74 on its outer surface and is otherwise similar to the disk 70 of the previous embodiment.
  • Fixed to the underside of the disk 70a is a conductive wiper member 116 having four bent down portions to form a central contact 118 and three other contacts 120, 122 and 124 which are spaced apart from each other and at the same distance from the central contact. These contacts are shown in phantom in FIG. 10.
  • the spacing of these contacts is such that at different rotational positions of the actuator disk the various terminals will be connected to either a power source or to ground.
  • the central contact 118 is aligned with and in constant contact with the central terminal 96 which is connected to the logic circuitry.
  • Fixed to the inside bottom surface of the switch body is a dielectric layer 126 to which the four terminals 96, 98, 104 and 108 are attached.
  • Around each of the outer terminals is a layer of conductive material formed as an area of a predetermined shape so as to provide the desired engagement between one of the disk contacts and a terminal as the actuator disk is rotated to different positions.
  • the shape of these three conductive areas 130, 132 and 134 around the terminals 104, 108 and 98 is also shown in FIG. 10.
  • terminal 104 and its conductive area 130 are connected to the negative power supply of the device; terminal 108 and its conductive area 132 are connected to ground potential; and terminal 98 and its conductive area 134 are connected to the internal logic or control circuitry.
  • the switch when the switch is in the Run position none of the contacts is on the power terminal 104, but they are aligned with and engaging the ground terminal 108 and the logic circuit terminals 96 and 98, thereby putting them at ground or potential and causing the watch to run normally.
  • logic terminals are connected by engaging contacts to the power terminal, thereby causing them to supply a negative signal to the logic circuit and advance the minutes display.
  • the terminal 98 In the Hold position, the terminal 98 is not connected to power and remains at its negative potential, while the logic terminal 96 is connected to ground, thereby causing the logic circuitry to hold the display at one point.
  • the polarity of the logic terminals is reversed to cause the logic circuitry to advance the hours display.
  • FIGS. 11a, 11b and 12 a switch 18b is shown in FIGS. 11a, 11b and 12 wherein a disk actuator 70b is rotatable to a pre-selected position and then is movable inwardly as by thumb pressure to make contacts with terminals within the switch.
  • a switch body similar to the embodiment of FIGS. 7 and 8 is provided which is secured within a cover plate of the device.
  • the leads 46 and 48 from the logic or control circuitry of the device and leads 106 and 110 from a ground and negative power source extend through the bottom of the switch body to four terminals 96, 98, 104 and 108 that are spaced apart and fixed to a dielectric sheet 126b on the body in a manner similar to the terminals of FIGS. 9 and 10.
  • the actuator disk 70b is supported within the switch body on a resiliently yieldable ring .140 which is made from a suitable elastomeric matefria l. Normally, this latter ring maintains the actuator ..the selected position (e.g. Hold or Reset Hours, etc.) and then is pressed inwardly. This causes a compression of the ring 140 and an axial movement of the disk which allows certain disk projections to make contact with aligned terminals. For example, in the Run posi- .tion shown in FIG. 12, the contact 12012 is in contact with the ground terminal 108, and the contacts ll8b and 122b are in contact with the logic terminals 96 and 98.
  • a resiliently yieldable ring .140 which is made from a suitable elastomeric matefria l. Normally, this latter ring maintains the actuator ..the selected position (e.g. Hold or Reset Hours, etc.) and then is pressed inwardly. This causes a
  • both are at ground potential, thereby maintaining the watch i n the Run mode.
  • a rotary movement and inward pressure on the disk 70b to another position will cause a different combination of contacts with the terminals to provide the desired operating mode as previously described. As soon as. the pressure is released the contacts are broken.
  • This version of my switch prevents the possibility of leaving the switch closed in one position for an undesired length of time.
  • t h'e present invention provides a highly versatile switch thatcan be made relatively small and compact and yet provide a multiplicity of functions or switch positions.
  • a limited number of terminals are employed on the illustrated examples of my switch, it is of course possible to provide additional terminals and by contacting different combinations of such terminals which contacts on the switch actuator and even greater num- .ber of switch functions may be provided.
  • the invention has been described in terms of embodiments particularly adaptable for use in an electronic watch it may be highly useful on a wide variety of electrically operated devices, especially where a disclosures of switch positions is desired.
  • An electrically operated timepiece comprising a plurality of components including a mounting board, an electrical circuit means fixed to said board, an oscillator means and a battery connected to said circuit means, and a housing means for supporting said components therein including front and rear wall members with a display means displaying at least hours and minutes mounted in said front wall member and connected to said circuit means.
  • switch means situated in said rear wall member and connected therethrough to said circuit means for setting the hours and minutes on said display means, said switch means comprising a thin disklike body forming a relatively shallow recess and extending inwardly from one of said wall members, said body having a planar bottom portion with a plurality of spaced apart terminals thereon each connected by conductors through said bottom portion to said circuit means, a rotatable actuator disk supported within said shallow recess with contact means on its underside for contacting individual terminals and interconnecting preselected pairs of terminals in different combinations when the disk is placed in various rotational positions for thereby controlling said display means.
  • the timepiece as described in claim 1 including a thin dielectric sheet fixed to said planar bottom portion, said terminals being supported by and exposed along the upper surface of said sheet, and conductive area means on said sheet, connected to said terminals and extending therefrom and having a predetermined irregular shaped pattern so as to be contacted by said contact means and thereby interconnect different combinations of terminals when said actuator disk is rotated to various preselected positions.
  • one of said conductive area means on said dielectric sheet extends radially outwardly from one said terminal to cover a radial area of at least 30 from the center of said sheet and the other said area means has a pair of radially extending portions from its terminal which are substantially 90 apart.
  • first and second conductive area means on said dielectric sheet both have two radially extending portions spaced about 90 apart from the center of said sheet, and a third said area means has a radially extending portion covering a segmental area of 30 from the center of said sheet.
  • an electronically operated watch having internal components including a mounting board, an electric circuit means fixed to said board, an oscillator means and a battery connected to said circuit means, a housing means for supporting said components therein including front and rear wall members connected by a peripheral sidewall and a display means including hour and minute indications mounted in said front member and connected to said circuit means, a
  • rotary switch means situated in said rear wall member and connected therethrough to said circuit means for setting the hours and minutes on said display means, said switch means comprising:
  • a relatively thin, disk-like body forming a shallow recess and extending inwardly from said rear wall member, said body having a planar bottom portion partially covered by dielectric material, a plurality of terminals on said bottomportion each being exposed on the surface of said dielectric material and connected therethrough to said circuit means, a ro tatable actuator disk supported within said shallow recess of said body, contact means on the underside of said actuator disk for contacting individual terminals and interconnecting preselected pairs of terminals in different combinations when the disk is placed in various rotational positions for thereby controlling said display means.
  • said dielectric material is a thin sheet attached to the bottom surface of said disk-like body and a thin layer of conductive material formed as conductive areas connected to and extending from said terminals and having predetermined shapes so that various combinations of terminals will be contacted by said contact means when said actuator disk is placed in different preselected positions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
US407147A 1973-10-17 1973-10-17 Switch for electronic watch Expired - Lifetime US3884033A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US407147A US3884033A (en) 1973-10-17 1973-10-17 Switch for electronic watch
CA201,453A CA995471A (en) 1973-10-17 1974-06-03 Switch for electronic watch
GB2846774A GB1446374A (en) 1973-10-17 1974-06-26 Watch
FR7424423A FR2257992B3 (fr) 1973-10-17 1974-07-12
JP49117786A JPS5063971A (fr) 1973-10-17 1974-10-15
FR7502795A FR2257938A1 (fr) 1973-10-17 1975-01-29
US05/560,824 US3934401A (en) 1973-10-17 1975-03-21 Switch for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US407147A US3884033A (en) 1973-10-17 1973-10-17 Switch for electronic watch

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/569,824 Continuation-In-Part US3999592A (en) 1975-04-21 1975-04-21 Apparatus and method for manufacturing cores and molds with static mixer stage

Publications (1)

Publication Number Publication Date
US3884033A true US3884033A (en) 1975-05-20

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ID=23610817

Family Applications (1)

Application Number Title Priority Date Filing Date
US407147A Expired - Lifetime US3884033A (en) 1973-10-17 1973-10-17 Switch for electronic watch

Country Status (5)

Country Link
US (1) US3884033A (fr)
JP (1) JPS5063971A (fr)
CA (1) CA995471A (fr)
FR (2) FR2257992B3 (fr)
GB (1) GB1446374A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968640A (en) * 1974-09-16 1976-07-13 Hughes Aircraft Company Digital watch with elastomer housing block and flexible printed circuitry
US4007347A (en) * 1975-07-28 1977-02-08 Haber Terry M Simplified actuating switch for electronic timepieces
US4244040A (en) * 1978-10-10 1981-01-06 Robert Fondiller Miniature electronic device construction
US4400095A (en) * 1982-10-12 1983-08-23 Timex Corporation Push button assembly for a watch
US4681461A (en) * 1985-10-31 1987-07-21 Montres Rado S.A. Electronic watch with operating controls in the back cover of the case
US20070103617A1 (en) * 2003-10-15 2007-05-10 Yasuo Kitajima Display unit

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482670U (fr) * 1977-11-24 1979-06-12
JPS5935888U (ja) * 1982-08-31 1984-03-06 セイコーインスツルメンツ株式会社 電子時計
FR2537297B1 (fr) * 1982-12-02 1985-10-11 Poux Jean Yves Systeme permettant le reglage des montres a quartz " sans poussoirs exterieurs au boitier "
EP0127651A1 (fr) * 1982-12-02 1984-12-12 POUX, Jean-Yves Montre a quartz a boitier monobloc sans poussoir ni couronne a l'exterieur
JPS60106196U (ja) * 1983-12-24 1985-07-19 塩尻工業株式会社 電子時計のスイツチ構造
JPH0648299B2 (ja) * 1985-02-14 1994-06-22 セイコー電子工業株式会社 電子時計用回転スイッチ
JPH02196993A (ja) * 1989-01-20 1990-08-03 Seiko Instr Inc 電子時計
JPH01251525A (ja) * 1989-01-20 1989-10-06 Seiko Instr Inc 電子時計
JPH01251524A (ja) * 1989-01-20 1989-10-06 Seiko Instr Inc 電子時計
JPH0454476Y2 (fr) * 1990-07-11 1992-12-21

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733810A (en) * 1970-03-06 1973-05-22 Rolex Montres Timepiece with electronically designed digital read-out
US3733803A (en) * 1971-06-23 1973-05-22 Citizen Watch Co Ltd Device for correcting time displayed on electronic timepiece

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733810A (en) * 1970-03-06 1973-05-22 Rolex Montres Timepiece with electronically designed digital read-out
US3733803A (en) * 1971-06-23 1973-05-22 Citizen Watch Co Ltd Device for correcting time displayed on electronic timepiece

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968640A (en) * 1974-09-16 1976-07-13 Hughes Aircraft Company Digital watch with elastomer housing block and flexible printed circuitry
US4007347A (en) * 1975-07-28 1977-02-08 Haber Terry M Simplified actuating switch for electronic timepieces
US4244040A (en) * 1978-10-10 1981-01-06 Robert Fondiller Miniature electronic device construction
US4400095A (en) * 1982-10-12 1983-08-23 Timex Corporation Push button assembly for a watch
US4681461A (en) * 1985-10-31 1987-07-21 Montres Rado S.A. Electronic watch with operating controls in the back cover of the case
US20070103617A1 (en) * 2003-10-15 2007-05-10 Yasuo Kitajima Display unit

Also Published As

Publication number Publication date
FR2257938A1 (fr) 1975-08-08
CA995471A (en) 1976-08-24
GB1446374A (en) 1976-08-18
FR2257992B3 (fr) 1977-05-06
FR2257992A1 (fr) 1975-08-08
JPS5063971A (fr) 1975-05-30

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