Download metric clock

CA2333779A1 - Metric clock - Google Patents Metric clock Download PDF Info Publication number CA2333779A1 CA2333779A1 CA 2333779 CA2333779A CA2333779A1 CA 2333779 A1 CA2333779 A1 CA 2333779A1 CA 2333779 CA2333779 CA 2333779 CA 2333779 A CA2333779 A CA 2333779A CA 2333779 A1 CA2333779 A1 CA 2333779A1 Authority CA Canada Prior art keywords clock metric recited time hands Prior art date 2001-01-03 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.) Abandoned Application number CA 2333779 Other languages French (fr) Inventor Stanley J. Rose 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.) Individual Original Assignee Individual 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.) 2001-01-03 Filing date 2001-01-03 Publication date 2002-07-03 1999-04-01 Priority to CA 2268216 priority Critical patent/CA2268216A1/en 2001-01-03 Application filed by Individual filed Critical Individual 2001-01-03 Priority to CA 2333779 priority patent/CA2333779A1/en 2002-07-03 Publication of CA2333779A1 publication Critical patent/CA2333779A1/en Status Abandoned legal-status Critical Current Links Espacenet Global Dossier CIPO Discuss Classifications G—PHYSICS G04—HOROLOGY G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS G04B19/00—Indicating the time by visual means G04B19/06—Dials G04B19/08—Geometrical arrangement of the graduations G04B19/085—Geometrical arrangement of the graduations varying from the normal 12 hour arrangement Landscapes Physics & Mathematics (AREA) Geometry (AREA) General Physics & Mathematics (AREA) Electromechanical Clocks (AREA) Abstract The invention is a novelty clock for the telling of time. It is designed to provide a humorous and interesting view of the metric system and how it might apply to timepieces. The metric clock may be used to tell time in the metric system should metric time be considered or implemented. The metric clock has a standard clock movement with 3 rotating hands. Time is told by the position of the hands relative to each other or relative to the clock face. Description METRIC CLOCKThe metric clock is simply a clock face divided into 10 increments. At the top of the face is the number 10 and the number 5 appears at the

Bottom. The face is divided into 10 equal spaces consisting of 36 degrees each. The segments are identified by marks along the outer edge of the face. The body consists of material suitable for engraving, printing or mounting of numbers and markers. The movement is a standard cluck movement. The hands are standard clock hands. Time is determined by the position of the hands. Claims (9) 1. A metric clock for the measuring, marking and telling of time. 2. The metric clock recited in claim 1 has a face divided into 10 equal portions consisting of 36 degrees each. 3. The metric clock recited in claim 1 has each of the 10 portions divided into 10 equal increments. 4. The metric clock recited in claim 1 has the number 10 at the top. 5. The metric clock recited in claim 1 has the number 5 at the bottom. 6. The metric clock recited in claim 1 has the balance of the increments identified by lines, dots, numbers, jewels, gems, or marks to delineate the separation of each portion. 7. The metric clock recited in claim 1 has a standard clock movement. 8. The metric clock recited in claim 1 has 3 standard clock hands. 9. The metric clock recited in claim 1 will apply to all timepieces using rotating hands. CA 2333779 1998-04-01 2001-01-03 Metric clock Abandoned CA2333779A1 (en) Priority Applications (2) Application Number Priority Date Filing Date Title CA 2268216 CA2268216A1 (en) 1998-04-01 1999-04-01 Coating technique CA 2333779 CA2333779A1 (en) 2001-01-03 2001-01-03 Metric clock Applications Claiming Priority (1) Application Number Priority Date Filing Date Title CA 2333779 CA2333779A1 (en) 2001-01-03 2001-01-03 Metric clock Publications (1) Publication Number Publication Date CA2333779A1 true CA2333779A1 (en) 2002-07-03 Family ID=4168232 Family Applications (1) Application Number Title Priority Date Filing Date CA 2333779 Abandoned CA2333779A1 (en) 1998-04-01 2001-01-03 Metric clock Country Status (1) Country Link CA (1) CA2333779A1 (en) 2001 2001-01-03 CA CA 2333779 patent/CA2333779A1/en not_active Abandoned Similar Documents Publication Publication Date Title PL354351A1 (en) 2004-01-12 Hexahydrofuro'2,3-b!furan-3-yl-n- {3'(1,3-benzodioxol -5- ylsulfonyl) (isobutyl) amino! -1-benzyl-2-hydroxypropyl} carbamate as retroviral protease inhibitor CA2131095A1 (en) 1993-09-04 Electronic marking instrument GB2361337B (en) 2003-11-12 Printing indicia on game balls JP4813250B2 (en) 2011-11-09 Reversible display device DE69915371D1 (en) 2004-04-08 MECHANISM FOR INDEPENDENT MOVEMENT OF THE PARTS OF A THREE-DIMENSIONAL OBJECT AND THEIR APPLICATIONS US7997789B2 (en) 2011-08-16 Clock for displaying collectibles CA2333779A1 (en) 2002-07-03 Metric clock HK1035582A1 (en) 2001-11-30 Precious metal chronograph watch

Introduction: Tempus - a Metric ClockI was asked to build a metric, or decimal clock, as they are not readily available commercially. Metric time, or French Revolutionary time, divides the day into decimal units. A day has 10 hours, an hour 100 minutes, and a minute 100 seconds.(If you do a search, you will discover so-called metric or decimal clocks for sale. But be careful - these clocks have what looks like a metric face (10 hour markings and numbering), but use a standard 12-hour mechanism, with 60 seconds per hour and 60 seconds per minute. Such a clock is not a metric clock at all. I have not been able to find a true metric clock for sale, other than antiques. If you find a modern one, please let me know.) I was asked to build an analog metric clock with hour, minute, and second hands that would run on Great Britain mains power. I have built clocks using 1 RPM synchronous motors, which run in step with 60 Hz 120v power. My first thought was to use a 50 Hz synchronous motor. But doing the math reveals this to be problematic. There are 60*60*24 or 86,400 seconds per day in standard time, but 10*100*100 = 100,000 seconds per day in metric time. So a metric second is .864 of a standard second. With 100 metric seconds per revolution of the seconds hands, that makes 86.4 standard seconds per revolution, 60/86.4 = .694444444 RPMs. Not easy to find a synchronous motor like that.What kind of motor could operate accurately at an unusual speed? I decided a stepper motor would work. My first thought along this line was to use one motor at the proper RPM for the seconds hand, and gears to drive the minutes and hours hands. But a divide by 100 gear train would require 4 sets of wheels and pinions to be compact. I decided to use a separate stepper motor for each hand.SuppliesMSP 430 Launchpad - Texas Instruments28BYJ-48 5v stepper motor with ULN2003 Driver Board - eBaypushbutton switch, SPST.1 uF ceramic capacitorUSB power supplyGears -