US3472021A - World time clock system - Google Patents

World time clock system Download PDF

Info

Publication number
US3472021A
US3472021A US3472021DA US3472021A US 3472021 A US3472021 A US 3472021A US 3472021D A US3472021D A US 3472021DA US 3472021 A US3472021 A US 3472021A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
clock
hour
time
zone
world
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
Inventor
Hajime Karakawa
Original Assignee
Hajime Karakawa
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
Grant date

Links

Images

Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00Indicating the time by visual means
    • G04B19/22Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/223Arrangements for indicating different local apparent times; Universal time pieces with rotary disc, rotary bezel, or rotary dial

Description

Oct. 14, 1969 H. KARAKAWA WORLD TIME CLOCK SYSTEM 2 Sheets-Sheet 1 Filed April 6, 1967 INVENTOR. fW/ME A 4Q4/(4W4 an /W Oct. 14, 1969 H. KARAKAWA WORLD TIME CLOCK SYSTEM 2 Sheets-Sheet Filed April 6. 1967' IIIIIIIIA 'll fill! mmlllllm mm] IILIII un-I" Fun-n United States Patent 3,472,021 WORLD TIME CLOCK SYSTEM Hajime Karakawa, PO. Box 335, Makawao, Hawaii 96768 Filed Apr. 6, 1967, Ser. No. 628,928

Int. Cl. G041) 19/22 US. CI. 58-43 1 Claim ABSTRACT OF THE DISCLOSURE A world time clock system having a 24-hour clock, which may be a one revolution per 12-hour movement clock with reducing means to halve the rotation to that of a 24-hour movement clock per one revolution, and by adding a zone disc which is driven by the hour hand, the hour hand being thus eliminated. By driving the zone disc around the clock face a complete turn in one 24- hour day, it is apparent what the actual time is in hours for any particular zone of interest, as well as the mmutes and seconds, which hands are also provided and driven by the clock mechanism. The dial of the clock contains the numbers of the hours and identification of day and night, or A.M. and P.M., in fixed relation, while the zone dial is radially disposed therewith and rotates about 1t as described above.

The present invention relates to an improved world time clock showing 24-hour movement throughout a single revolution of the zone disc or hour indicator means, and more particularly the invention relates to a mechanism that can be used to reduce the hour hand rotatron of once in 12-hour movement to once in a 24-hour period, and by attaching a zone disc adjacent a numbered face so that the time in hours and minutes at any one particular zone may be readily determined by a single 1nstrument. I

A further object and advantage of the invention 1s to enable one to become knowledgeable of the time throughout the world any day or night so that the time of a particular place in any given time zone may be read1ly determined.

Another object of the invention is to provide a device that is easily manufactured with slight additional cost to present clock structures to provide the usefulness and advantages as set forth above.

The above and other objects and advantages will become apparent upon full consideration of the following detailed description and accompanying drawings in which:

FIGURE 1 is a front elevation view with a portion thereof broken away and illustrating the salient features of the invention;

FIGURE 2 is a cross-sectional view taken along lines 2--2 of FIGURE 1.

Referring now to the drawings, there is shown a basic or conventional 12-hour clock having a wall plate 12 for it to be mounted on a. wall or other vertical structure, and in which the clock movement provides one rotation of the hour hand for any 12-hour period. A spindle shaft 14 inserted within spindle shaft 16 is provided to indicate seconds and minutes on the face of the clock in conventional rotation of the second hand 20 and the minute hand 22, as seen in FIG. 1. There is also provided in concentric rotation with spindles 14, 16, an outside shaft 26 which is driven by a further reducing mechanism 28 so that the shaft 26 provides one rotation in a period of 24 hours in lieu of the 12-hour period. The gear 30 is seen to drive the shaft 26 and a bearing 32 is provided to seal the enclosure of the clock 10. The shaft 26' is secured to a flange 34 which in turn supports the zone disc 38 which may be made of plastic or other material adaptable for receiving decals or other indicia thereon. Screws 40, 42 are provided to secure the flange 34 to the zone disc 38.

Behind the zone disc 38 and mounted for adjustably fixed positioning, there is a circular 24-hour clock face 40 which may be readily observed through the transparent zone disc 38. The zone disc 38 revolves around the clock face for a complete turn in one 24-hour day, and there is disposed on the zone disc indicia indicative of the respective zones throughout the world between 0 longitudinal and longitude both East and West. The zone disc indicates the hours that are passing through the zones, while the second and minute hands indicate the correct portions of the hour of each such zone.

The time is set by first getting the correct time of the zone where the clock is positioned and aligning the hour number with the zone disc. For instance, since the clock 10 is in a given zone, the clock face 40 is rotated until it is in proper alignment to indicate the correct time to the zone where the clock 10 is. After the correct setting, all the rest of the zones will have the proper time capable of being identified or indicate-:1. Also substitute or replacement daylight indicia decals for the indicia decals 48, 50 may be replaced to indicate daylight time in those zones that are characterized by daylight saving. By means of the clock of the present invention, it is possible to perceive that part of the world that is in daylight and night, as well as that part which is in daylight saving time, as described above. The clock of the present invention shows how and when the calendar day changes take place and also the function of the international date line which is disclosed and made part of FIG. 1.

While some airports and other facilities have two dozen clocks for each of the time zones and cities of such time zones, it is seen by the apparatus of the present invention that one can obtain all the time zone information for any given time zones as well as for a given city or country, as well as the day and night periods thereof all from a single instrument. The clock is useful for understanding present day rapid transportation on land, sea and air when traveling to different time zones and across the international date line.

What is claimed is:

1. A world time clock apparatus having a conventional mechanism in which there is one revolution of the hour hand per 12-hour movement thereof, the improvement thereof consisting in reducing means to halve the rotation of the hour hand to a 24-hour movement clock, the minute hand of said clock mechanism disposed within a concentric hollow shaft, said concentric hollow shaft being driven by said 24-hour movement means, said concentric hollow shaft driving a zone disc, said zone disc having indicia of the 24 time zones throughout the world indicative of the times thereof, a face plate for said clock mechanism, and indicia decals may be replaced by daylight indicia decals to indicate daylight saving time in those zones that are characterized by daylight saving time, the rotating zone disc being superimposed over a clock face which indicates the portions of the hours that are indicated on the zone disc.

References Cited UNITED STATES PATENTS 2,056,038 9/1936 Angelis et al. 5-8-43 2,641,898 6/1953 Galley 58-43 3,049,863 10/1962 Ranney 5844 3,091,915 6/1963 Pawl 5850 RICHARD B. WILKINSON, Primary Examiner E. C. SIMMONS, Assistant Examiner

US3472021A 1967-04-06 1967-04-06 World time clock system Expired - Lifetime US3472021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US62892867 true 1967-04-06 1967-04-06

Publications (1)

Publication Number Publication Date
US3472021A true US3472021A (en) 1969-10-14

Family

ID=24520890

Family Applications (1)

Application Number Title Priority Date Filing Date
US3472021A Expired - Lifetime US3472021A (en) 1967-04-06 1967-04-06 World time clock system

Country Status (1)

Country Link
US (1) US3472021A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675411A (en) * 1970-02-27 1972-07-11 Seiko Instr & Electronics World timepiece
EP0086849A1 (en) * 1982-01-12 1983-08-31 Siegfried Pohl Werkzeug- und Formenbau World time indicating device
US5383165A (en) * 1992-07-17 1995-01-17 Compagnie Des Montres Longines Francillon S.A. Timepiece with a universal time display
EP0769733A1 (en) * 1995-10-18 1997-04-23 P.P.I. Intellectual Properties Ltd. Timepiece
US20020049122A1 (en) * 1998-07-23 2002-04-25 Fred Mercado Exercise and therapeutic trainer
US20110151415A1 (en) * 2008-08-14 2011-06-23 World View Time, Inc. Electronic presentation of world time zones
US9417888B2 (en) 2005-11-18 2016-08-16 Apple Inc. Management of user interface elements in a display environment
US9483164B2 (en) 2007-07-18 2016-11-01 Apple Inc. User-centric widgets and dashboards
US9507503B2 (en) 2004-06-25 2016-11-29 Apple Inc. Remote access to layer and user interface elements
US9804569B2 (en) * 2015-06-05 2017-10-31 Casio Computer Co., Ltd. Hand unit and timepiece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056038A (en) * 1935-06-25 1936-09-29 Angelis John De Universal clock
US2641898A (en) * 1950-06-22 1953-06-16 Tissot Horlogerie Universal timekeeper
US3049863A (en) * 1960-04-26 1962-08-21 Boivin C Ranney Globe and clock construction
US3091915A (en) * 1960-04-13 1963-06-04 Walter S Pawl Universal timepiece

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056038A (en) * 1935-06-25 1936-09-29 Angelis John De Universal clock
US2641898A (en) * 1950-06-22 1953-06-16 Tissot Horlogerie Universal timekeeper
US3091915A (en) * 1960-04-13 1963-06-04 Walter S Pawl Universal timepiece
US3049863A (en) * 1960-04-26 1962-08-21 Boivin C Ranney Globe and clock construction

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675411A (en) * 1970-02-27 1972-07-11 Seiko Instr & Electronics World timepiece
EP0086849A1 (en) * 1982-01-12 1983-08-31 Siegfried Pohl Werkzeug- und Formenbau World time indicating device
US5383165A (en) * 1992-07-17 1995-01-17 Compagnie Des Montres Longines Francillon S.A. Timepiece with a universal time display
EP0769733A1 (en) * 1995-10-18 1997-04-23 P.P.I. Intellectual Properties Ltd. Timepiece
US20020049122A1 (en) * 1998-07-23 2002-04-25 Fred Mercado Exercise and therapeutic trainer
US9507503B2 (en) 2004-06-25 2016-11-29 Apple Inc. Remote access to layer and user interface elements
US9753627B2 (en) 2004-06-25 2017-09-05 Apple Inc. Visual characteristics of user interface elements in a unified interest layer
US9417888B2 (en) 2005-11-18 2016-08-16 Apple Inc. Management of user interface elements in a display environment
US9483164B2 (en) 2007-07-18 2016-11-01 Apple Inc. User-centric widgets and dashboards
US20110151415A1 (en) * 2008-08-14 2011-06-23 World View Time, Inc. Electronic presentation of world time zones
US8221125B2 (en) 2008-08-14 2012-07-17 World View Time Inc. Electronic presentation of world time zones
US9804569B2 (en) * 2015-06-05 2017-10-31 Casio Computer Co., Ltd. Hand unit and timepiece

Similar Documents

Publication Publication Date Title
US3271945A (en) Watch casing with rotatable bezel
US3540209A (en) Horological time display
US3318085A (en) Setting means for universal timepiece
US3733810A (en) Timepiece with electronically designed digital read-out
US4482255A (en) Timepiece for displaying both time and orientation of the timepiece relative to the terrestrial magnetic field
US2852908A (en) Mysterious wrist watch
US557173A (en) Geographical-clock dial
US5708628A (en) Universal time equipment
US1998763A (en) Direct reading clock
US3662535A (en) Aircraft time indicator
US4766579A (en) Timepiece having a control stem correcting mechanism with at least two setting positions
US2305283A (en) Program clock
US3305946A (en) Apparatus simulating the illumination of earth by the sun at any time and date
US3587222A (en) Linear clock
US4748603A (en) Chronograph watch
US3815351A (en) Calendar indicator for time measuring systems
US3675411A (en) World timepiece
US20080013409A1 (en) Timepiece with overlapping, separately driven analog and mechanical functionality
US4077032A (en) Electronic display apparatus
Zeff Comparison of conventional and digital time displays
US3962861A (en) Apparatus for determining and lastingly showing the time at which an event occurs
US3695035A (en) Timepiece movement
US2456122A (en) Time zone watch
US3183659A (en) Watch with a sweep second hand and running-indicator means
US5349572A (en) Clock dial