US3823545A - Electronic watch - Google Patents
Electronic watch Download PDFInfo
- Publication number
- US3823545A US3823545A US00187961A US18796171A US3823545A US 3823545 A US3823545 A US 3823545A US 00187961 A US00187961 A US 00187961A US 18796171 A US18796171 A US 18796171A US 3823545 A US3823545 A US 3823545A
- Authority
- US
- United States
- Prior art keywords
- data
- time
- logic circuit
- circuit
- display
- 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
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G5/00—Setting, i.e. correcting or changing, the time-indication
- G04G5/04—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently
- G04G5/043—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected
- G04G5/045—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected using a sequential electronic commutator
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0064—Visual time or date indication means in which functions not related to time can be displayed
- G04G9/007—Visual time or date indication means in which functions not related to time can be displayed combined with a calculator or computing means
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
- G04G9/10—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes
- G04G9/107—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes provided with means for displaying at will a time indication or a date or a part thereof
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/08—Output circuits
Definitions
- An electronic watch which includes a time base, a logic circuit and an electronic display, comprises a data input device including at least one manual con trol member for transferring data, eg a numerical value or a numerically coded instruction, into the logic circuit by means of a logic transfer circuit.
- any of 60 different data of any kind may be introduced into the logic circuit by means of a single push button.
- a number between 0 and 59 is attributed to each of these data. Any of these data is introduced by pushing the button where the corresponding number is displayed by the seconds display.
- a number indicated on a separate display by means of a separate counter can be selectively transferred into any part of the time counter to thereby set the time.
- the number indicated can be transferred into any digit of a register part of an auxiliary calculator included in the logic circuits to thereby introduce the number to be processed.
- an indication of a first unit of time e.g. seconds
- an indication of a second unit of time e.g hours
- a supplementary impulse generator selectively accelerating the sequential indication of seconds.
- the present invention relates to electronic watches.
- An aim of the present invention is to resolve this problem.
- an electronic watch comprises a data input device, said device comprising first circuit means for sequentially emitting data, a display device for electronically displaying the data emitted by the first circuit means, and a manual control member acting on a logical transfer circuit for controlling transfer of the displayed data.
- FIG. I is a block diagram of a basic arrangement of a watch according to the invention in which the circuit sequentially emitting data and the electronic display device are also used for displaying the time
- FIGS. 2 to 4 are more detailed partial block diagrams of three specific embodiments of the basic arrangement
- FIG. 5 is a partial block diagram of another embodiment
- FIG. 6 is a block diagram of a further embodiment
- FIG. 7 is. a partial block diagram of an improvement of the embodiment according to FIG. 6.
- the watch schematically shown in FIG. ll comprises a time base I supplying impulses which are counted and transcoded by at least a part of a logic circuit 2 before being applied to an electronic display device 3.
- the logic circuit 2 may otherwise carry out other accessory functions, as mentioned earlier, such as making simple calculations, storing simple data or simply switching on and off a receiver, a personal location apparatus or a small recorder.
- a supplementary circuit 4 enables introduction into the logical circuit 2 of a number of data equal to the number of different indications that can be displayed. To employ the device, it suffices to wait until the data that it is desired to introduce into the circuit 2 is displayed by the device 3 and actuate the manual control member 5 (hereinafter simply referred to as push button) at the moment when this data is displayed.
- the manual control member 5 hereinafter simply referred to as push button
- FIG. 2 is a partial schematic view of a first specific embodiment of the arrangement of FIG. I.
- the display device 3 consists of sixty luminous points formed by electroluminescent lamps or diodes 6 each remaining illuminated in turn during one second, so as to display the second.
- the watch also comprises displays of the hours and minutes, which are also not shown for the sake of greater clarity.
- the additionnal circuit 4 is formed of AND logical gates 7 one of the inputs of each of which is controlled by a circuit comprising the positive pole of a voltage source, not shown, in series with a switch or contact 8 controlled by the push button 5.
- the other input of each of the AND gates 7 is separately connected to the control circuit of one of the luminous diodes 6.
- the output of each of the AND gates is separately applied to the logic circuit 2.
- the described data input device will for example enable modification of the position of the counter included in the circuit 2 so as to carry out setting of the time.
- this data input device it is possible to introduce sixty different data by means of a single push button 5. For example, if it is desired to introduce the data corresponding to the number three the operator will wait until the luminous diode 6 corresponding to the second 3" lights up, an then actuate the push button 5.
- FIG. 3 shows a second specific embodiment of the arrangement according to FIG. ll, namely a watch with a digital display of seconds provided by two matrices 9 each comprising fifteen electroluminescent diodes 10, only one of these matrices being shown. Only the matrix displaying the units of seconds is used for the input of data, which enables the input of 10 different data.
- the normal circuit of the watch associated with the time display comprises a counter 11 of which only the part corresponding to the counting of units of seconds is shown, this part delivering four logical signals A, B, C, D indicating the second in binary code.
- this code is firstly transformed into decimal code by a matrix 12 composed of diodes 13 then into a code for controlling the 15 diodes III of the matrix 9 by means of a further matrix I5 including diodes 16.
- the number seven is displayed by the diodes lltl.
- the data input circuit 4 comprises ten AND gates 17 controlled by the output of the transcoder matrix I2 and by a circuit comprising the positive pole of a voltage source in series with a switch or contact 18 controlled by means of the push button 5.
- the data input circuit enables the introduction of one of the ten data 9" to 9" by pressing on the push button 5 at the moment when the number of the desired data is displayed by the matrix 9.
- the data 0" to 9" thus introduced can be used to carry out a setting of the time or for other purposes, as will be described further on.
- FIG. 4 is a partial block diagram of a third specific embodiment of the arrangement according to FIG. 1, in which the introduction of data enables setting of the watch according to the time zone.
- the watch comprises an hours display formed by a matrix 20 of electroluminescent diodes for displaying the units and a matrix 21 for displaying the tens of hours and a seconds display formed by a matrix 22 for displaying the units and a matrix 23 for displaying the tens of seconds.
- the matrices 20 to 23 are respectively controlled by transcoders 24 to 27 with four, three or two inputs (as shown) and each with outputs, only one of these outputs for each transcoder being shown.
- the inputs of each of the transcoders 24 to 27 are provided by the outputs A, B, C, D of four counting groups 28 to 31 with four, three or two stages, as shown, of an impulsion counter fed by a time base 132.
- the outputs A, B, C, D of groups 28 to 31 indicate in binary code the decimal number which must be displayed by the corresponding matrix to 23.
- Each of the stages of the counting groups 28 and 29 comprises a SET input S and a RESET input R,'these inputs S and R being such that when a logical signal of value 1 and a logical signal of value 0 are respectively applied to the input S and R, the output takes the logical value 1, and conversely.
- the inputs R and S are themselves controlled by the corresponding outputs of eight AND logical gates 32 for the group 28 and four AND logical gates 33 for the group 29.
- One of the inputs of each of the AND gates 32 and 33 is fed by a circuit comprising the positive pole of a current source connected in series with a contact or switch 34 controlled by a push button 35.
- the other inputs of the AND gates 32 connected to the inputs S of the group 28 are connected directly to the corresponding outputs A, B, C, D of the group 30, whilst the other inputs of the AND gates 32 connected to the inputs R of the group 28 are connected to the corresponding outputs A, B, C, D of the group 30 via a corresponding inverter 36.
- the other inputs of the AND gates 33 are connected in the same manner to the outputs A, B of the counting group 31, two inverters 37 being provided for this purpose; Counters 28, 29 and inverters 36, 37 form the logic transfer circuit of FIG. 1.
- the matrices 2 and 23 display a desired indication and to press on the push button 35 so that the number displayed by these matrices is transferred to the counters 28 and 29 and hence to the matrices 20 and 21.
- the push button 35 is actuated with the display in the state shown, the number twenty four displayed by the matrices 20 and 21 will be replaced by the number seventeen displayed by the matrices22 and 23.
- the use of the display of seconds for the sequential indication of data to be selected has the disadvantage of obliging the user to wait for a desired indication of the second before carrying out selection.
- This time can be up to 59 seconds for the embodiments according to FIGS. 2 and 4.
- a time interval of only one second is available for giving the selection order.
- FIG. 5 is a partial block diagram of another embodiment in which a frequency generator and an auxiliary counter are provided to accelerate the introduction of data.
- the normal time display of the watch comprises a matrix 40 of electroluminescent diodes controlled by a counting group 41 with four stages, via a transcoder 42.
- the matrix 40 is intended to display the minutes for example, the other matrices not being shown.
- the data introduction device comprises an auxiliary impulse generator 43 and an auxiliary counter 44.
- the four binary outputs A, B, C, D of the counter 44 are respectively applied to one of the inputs of four corresponding AND logical gates 45 the other inputs of which are controlled by a circuit comprising the positive pole of a voltage source in series with a switch or contact 46 controlled by a push buttom 47.
- the data 48 emitted at the outputs of the four AND gates 45 are applied to the logic circuit 2, not shown, for example with a view toward carrying out a setting of the time indicated by the watch, or changing the content of a register part of an auxiliary calculator.
- Actuation of the auxiliary generator 43 is controlled by a circuit comprising the positive pole of a voltage source in series with a switch or contact 49 controlled by a push button 50.
- the latter circuit also controls a selector 51 with two positions and four channels comprising four OR logical gates 52, eight AND logical gates 53 and four inverters 54.
- the generator 43 In normal operation, that is to say when the two switches 46 and 49 are open, the generator 43 is inoperative and the selector 51 transmits to the transcoder 42 the binary outputs A, B, C, D of the counter 41, which binary outputs are transcoded into the decimal system by the transcoder 42 and displayed by the matrix 40.
- the push button 50 When the push button 50 is actuated, the generator 43 is put into operation and the state of the selector 51 is modified so that the outputs A, B, C, D of the counter 44 are applied to the transcoder 42 and displayed by the matrix 40.
- the push button 50 When the desired decimal number is displayed by the matrix 40, the push button 50 is relaxed and push button 47 is actuated so as to emit output data 48 representing in binary code the number which had been displayed by the matrix 40.
- the rate of sequential indication of the data to be transferred is no longer one number per second however, it is necessary to provide a supplementary push button.
- an additional push button enabling adjustment of the frequency of the generator 43 by changing the value of one of the elements determining its frequency, for example by means of a pressure-sensitive element such as a piezo-transistor.
- This push button could alternatively be combined with the push button 50 so that only two push buttons are required.
- the generator 43 could be eliminated, and a step by step control of the counter could be carried out by actuation of the push button 50 to close the switch 49.
- data can be combined to form a more evolved data.
- the operator could introduce a first data representing one of several possible orders or commands, and then introduce a second data representing a numerical value attached to the given order.
- FIG. 6 shows an embodiment of watch in which the second, the tens of seconds, the minute, and the tens of minutes can be selectively set by firstly introducing a first data indicating which of these four operations it is wished to carry out, and then introducing a second data indicating the corrected value.
- the normal time indicating device 55 comprises a matrix 56 for displaying the seconds, a matrix 57 for displaying the tens of seconds, a matrix 58 for displaying the minutes, and a matrix 59 for displaying the tens of minutes, these matrices being controlled from corresponding counters 68 to 63 through transcoders 64 to 67 respectively.
- the device 68 for setting the time comprises a display matrix 69 which does not form part of the time display. This matrix 69 is controlled by means of an independent counter 70, through a transcoder 7 l.
- the counter 70 moves forward step by step by means of a push button 86 controlling a switch or contact 87.
- the set of four binary outputs A, B, C, D of the counter 70 is applied to a transfer block 73 controlling the counter 68 for the units of seconds and to a transfer block 74 controlling the counter 62 for the units of minutes, whilst only the binary outputs A, B, C of the counter 78 are applied to the transfer blocks 75 and 76 controlling the counters 6ll and 63 for the tens of seconds and the tens of minutes respectively. In practice, since these latter counters do not provide for the display of any number greater than five, the binary output D of the counter 78 is not required.
- These transfer blocks 73 to 76 also comprise a control input respectively actuated by an AND logical gate 77, 78, 79, 80 each with three inputs.
- the transfer blocks 73 to 76 transfer to the corresponding counter 68 to 63 the data at the outputs A, B, C, D of the counter 78 when a control impulse is emitted by the corresponding AND gate 77 to 88.
- the transfer blocks 73 to 76 can be formed in the same manner as the device with AND gates 33 and inverters 37 of. FIG. 4.
- the time setting device also comprises a memory 81 formed of two RS type flipflops 82, 83 and a logical input comprising four AND gates 84 and two inverters 85.
- the time setting device comprises a second push button 88 controlling a switch or contact 89 for the excitation of one of the inputs of each of the four AND gates 77 to 80, and a third push button 90 controlling a switch or contact 91 for the excitation of one of the inputs of each of the AND gates 84.
- The'operation of the device is as follows For each of the four orders which can be carried out, a code number is attributed according to the following table O correction of the units of seconds l correction of the tens of seconds 2 correction of the units of minutes 3 correction of the tens of minutes.
- the button 98 is actuated, the effect of which is to register this number in the memory 811.
- FIG. 7 is a partial block diagram of an improvement of the input device according to FIG. 6, in which the two push buttons 88 and are replaced by a single push button 92 actuating a switch or contact 93.
- the data input device comprises a supplementary display matrix 94 with two diodes, controlled by a T-type flipflop 95 (two state counter). The outputs Q and O of the flip-flop95 change state each time that the button 92 is lifted up, the state of the flip-flop or counter 95 being displayed by the matrix 94.
- the device also comprises two AND gates 96 and 97 whose outputs 98 and 99 respectively replace the two push buttons 98 and 88 of FIG. 6. By applying on the button 92, the logical state l is alternatively imposed on the outputs 98 and 99, which thus behave the same as when the push buttons 88 and 90 of FIG. 6 are actuated alternatively.
- the data input device thus enables setting the time of a watch in the most general sense of the term. It additionally enables, by the use of more or less advanced logical systems, but which are available with present day integrated circuit techniques, other operations to be carried out. For example, for the adjustment of the running or timekeeping of the watch, an order can be given to modify the division ratio at the beginning of the counting chain by a certain number of parts per million (ppm).
- ppm parts per million
- the device also makes possible the provision of certain new functions in a watch, such as Momentary use of the display of the watch for the display of other data, for example the atmospheric pressure, the acceleration undergone by the wearer, or the wearers pulse rate.
- an electronic watch having a time base, a logic circuit, an input of which is coupled to an output of said time base, and an electronic display means coupled to the output of said logic circuit, the improvement comprising: data input means coupled between the output of said logic circuit and a further input thereof for selectively transferring signals from the output of said logic circuit to said further input; and manual control means coupled to said data input means for selecting the data to be transferred from said output of said logic circuit to said further input.
- said logic circuit includes first means for generating a signal corresponding to units of time to be displayed on said display means, the input of said data input means being coupled to the output of said first means.
- a watch according to claim 1 in which actuation of said manual control means causes transfer of data displayed by said display means to a circuit to cause a shift in said circuit, said shift corresponding to said displayed data.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Electric Clocks (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00385041A US3852952A (en) | 1970-10-20 | 1973-08-02 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1546470A CH533332A (fr) | 1970-10-20 | 1970-10-20 | Montre électronique |
Publications (1)
Publication Number | Publication Date |
---|---|
US3823545A true US3823545A (en) | 1974-07-16 |
Family
ID=4409326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00187961A Expired - Lifetime US3823545A (en) | 1970-10-20 | 1971-10-12 | Electronic watch |
Country Status (10)
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3910030A (en) * | 1973-09-12 | 1975-10-07 | Ise Electronics Corp | Digital clocks |
US3914931A (en) * | 1974-10-01 | 1975-10-28 | Suwa Seikosha Kk | Electronic timepiece |
US3925978A (en) * | 1972-07-31 | 1975-12-16 | Suwa Seikosha Kk | Time correcting arrangement for electronic wrist watches |
US4004407A (en) * | 1973-09-19 | 1977-01-25 | Kabushiki Kaisha Suwa Seikosha | Digital display electronic timepiece |
US4020626A (en) * | 1974-05-14 | 1977-05-03 | Kabushiki Kaisha Daini Seikosha | Electronic timepiece |
US4086755A (en) * | 1974-11-14 | 1978-05-02 | Kabushiki Kaisha Daini Seikosha | Apparatus for correcting second hand of electronic timepiece |
US4090353A (en) * | 1975-01-10 | 1978-05-23 | Sharp Kabushiki Kaisha | Touch switch controlled time information correction with safety lock in an electronic wristwatch |
USRE29720E (en) * | 1972-04-17 | 1978-08-08 | Kabushiki Kaisha Suwa Seikosha | Time correcting apparatus for an electronic timepiece |
US4133169A (en) * | 1974-08-30 | 1979-01-09 | Ebauches S.A. | Electronic circuit for a quartz crystal watch |
US4170870A (en) * | 1972-07-12 | 1979-10-16 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Control unit for electronic time-piece display |
US4182113A (en) * | 1972-04-21 | 1980-01-08 | Casio Computer Co., Ltd. | Electronic time keeping device with time-shared timing indicator |
US4199751A (en) * | 1977-06-08 | 1980-04-22 | Centre Electronique Horloger Sa | Device for the input of alphanumerical data for apparatus of small size |
US4228648A (en) * | 1978-10-11 | 1980-10-21 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Hour hand corrector for dual display timepiece |
US4232510A (en) * | 1974-09-25 | 1980-11-11 | Citizen Watch Co., Ltd. | Timepiece |
US4316276A (en) * | 1974-08-15 | 1982-02-16 | Bulova Watch Company, Inc. | Key-operated solid-state timepieces |
USRE31225E (en) * | 1975-02-13 | 1983-05-03 | Timex Corporation | Single switch arrangement for adjusting the time being displayed by a timepiece |
US5596554A (en) * | 1993-06-04 | 1997-01-21 | Hagadorn; Hubert W. | Set operation in a timepiece having an electrooptical display |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2264316A1 (en) * | 1974-03-12 | 1975-10-10 | Cetehor | Setting circuit for clock or calendar display - with comparator connected to pre-selector storing setting information |
CH1377974A4 (US07652168-20100126-C00068.png) * | 1974-10-14 | 1976-10-29 | ||
JPS51143327A (en) * | 1975-06-04 | 1976-12-09 | Canon Inc | Photographing data indication system |
DE2660840C2 (de) * | 1975-06-04 | 1985-08-08 | Canon K.K., Tokio/Tokyo | Informationseingabesystem für eine Kamera |
DE2660839C2 (de) * | 1975-06-04 | 1985-08-14 | Canon K.K., Tokio/Tokyo | Informationseingabesystem für eine Kamera |
CH654169GA3 (US07652168-20100126-C00068.png) * | 1984-04-25 | 1986-02-14 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3258906A (en) * | 1964-03-04 | 1966-07-05 | Gen Time Corp | Solid state clock |
US3646751A (en) * | 1969-12-05 | 1972-03-07 | Detection Sciences | Digital timing system |
US3672155A (en) * | 1970-05-06 | 1972-06-27 | Hamilton Watch Co | Solid state watch |
-
1970
- 1970-10-20 CH CH1546470D patent/CH1546470A4/xx unknown
- 1970-10-20 CH CH1546470A patent/CH533332A/fr unknown
-
1971
- 1971-09-09 BE BE772397A patent/BE772397A/xx unknown
- 1971-09-15 FR FR7133275A patent/FR2112320B1/fr not_active Expired
- 1971-09-17 JP JP7184571A patent/JPS568315B1/ja active Pending
- 1971-10-04 DE DE2149535A patent/DE2149535C3/de not_active Expired
- 1971-10-05 CA CA124,446A patent/CA997032A/en not_active Expired
- 1971-10-08 GB GB4704771A patent/GB1372714A/en not_active Expired
- 1971-10-12 US US00187961A patent/US3823545A/en not_active Expired - Lifetime
- 1971-10-15 NL NL7114231A patent/NL7114231A/xx not_active Application Discontinuation
-
1979
- 1979-04-26 HK HK277/79A patent/HK27779A/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3258906A (en) * | 1964-03-04 | 1966-07-05 | Gen Time Corp | Solid state clock |
US3646751A (en) * | 1969-12-05 | 1972-03-07 | Detection Sciences | Digital timing system |
US3672155A (en) * | 1970-05-06 | 1972-06-27 | Hamilton Watch Co | Solid state watch |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE29720E (en) * | 1972-04-17 | 1978-08-08 | Kabushiki Kaisha Suwa Seikosha | Time correcting apparatus for an electronic timepiece |
US4182113A (en) * | 1972-04-21 | 1980-01-08 | Casio Computer Co., Ltd. | Electronic time keeping device with time-shared timing indicator |
US4170870A (en) * | 1972-07-12 | 1979-10-16 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Control unit for electronic time-piece display |
US3925978A (en) * | 1972-07-31 | 1975-12-16 | Suwa Seikosha Kk | Time correcting arrangement for electronic wrist watches |
US3910030A (en) * | 1973-09-12 | 1975-10-07 | Ise Electronics Corp | Digital clocks |
US4004407A (en) * | 1973-09-19 | 1977-01-25 | Kabushiki Kaisha Suwa Seikosha | Digital display electronic timepiece |
US4020626A (en) * | 1974-05-14 | 1977-05-03 | Kabushiki Kaisha Daini Seikosha | Electronic timepiece |
US4316276A (en) * | 1974-08-15 | 1982-02-16 | Bulova Watch Company, Inc. | Key-operated solid-state timepieces |
US4133169A (en) * | 1974-08-30 | 1979-01-09 | Ebauches S.A. | Electronic circuit for a quartz crystal watch |
US4232510A (en) * | 1974-09-25 | 1980-11-11 | Citizen Watch Co., Ltd. | Timepiece |
US3914931A (en) * | 1974-10-01 | 1975-10-28 | Suwa Seikosha Kk | Electronic timepiece |
US4086755A (en) * | 1974-11-14 | 1978-05-02 | Kabushiki Kaisha Daini Seikosha | Apparatus for correcting second hand of electronic timepiece |
US4090353A (en) * | 1975-01-10 | 1978-05-23 | Sharp Kabushiki Kaisha | Touch switch controlled time information correction with safety lock in an electronic wristwatch |
USRE31225E (en) * | 1975-02-13 | 1983-05-03 | Timex Corporation | Single switch arrangement for adjusting the time being displayed by a timepiece |
US4199751A (en) * | 1977-06-08 | 1980-04-22 | Centre Electronique Horloger Sa | Device for the input of alphanumerical data for apparatus of small size |
US4228648A (en) * | 1978-10-11 | 1980-10-21 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Hour hand corrector for dual display timepiece |
US5596554A (en) * | 1993-06-04 | 1997-01-21 | Hagadorn; Hubert W. | Set operation in a timepiece having an electrooptical display |
Also Published As
Publication number | Publication date |
---|---|
NL7114231A (US07652168-20100126-C00068.png) | 1972-04-24 |
CH533332A (fr) | 1972-09-15 |
DE2149535A1 (de) | 1972-04-27 |
FR2112320A1 (US07652168-20100126-C00068.png) | 1972-06-16 |
DE2149535C3 (de) | 1974-06-27 |
HK27779A (en) | 1979-05-04 |
JPS568315B1 (US07652168-20100126-C00068.png) | 1981-02-23 |
CH1546470A4 (US07652168-20100126-C00068.png) | 1972-09-15 |
FR2112320B1 (US07652168-20100126-C00068.png) | 1976-03-26 |
DE2149535B2 (de) | 1973-11-29 |
BE772397A (fr) | 1972-01-17 |
CA997032A (en) | 1976-09-14 |
GB1372714A (en) | 1974-11-06 |
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