CH661175GA3 - Solar clock - Google Patents

Solar clock Download PDF

Info

Publication number
CH661175GA3
CH661175GA3 CH316285A CH316285A CH661175GA3 CH 661175G A3 CH661175G A3 CH 661175GA3 CH 316285 A CH316285 A CH 316285A CH 316285 A CH316285 A CH 316285A CH 661175G A3 CH661175G A3 CH 661175GA3
Authority
CH
Switzerland
Prior art keywords
dial
sun
graduations
clock
hour
Prior art date
Application number
CH316285A
Other languages
French (fr)
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 filed Critical
Priority to CH316285A priority Critical patent/CH661175GA3/en
Publication of CH661175GA3 publication Critical patent/CH661175GA3/en

Links

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
    • G04B49/00—Time-pieces using the position of the sun, moon or stars
    • G04B49/02—Sundials
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Abstract

The solar clock includes a dial (19) provided with hour graduations (20) and a stylus (12) arranged, with respect to the dial, so that its shadow is projected thereon by the sun. A series of light sources (21) are distributed over the dial opposite its graduations. When a photoelectric diode (22) signals that the intensity of the light received by the clock is below a specified level (disappearance of the sun), control electronics (23) turn on the light source arranged opposite the graduation of the dial which corresponds most closely to the current hour. <IMAGE>
CH316285A 1985-07-22 1985-07-22 Solar clock CH661175GA3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH316285A CH661175GA3 (en) 1985-07-22 1985-07-22 Solar clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH316285A CH661175GA3 (en) 1985-07-22 1985-07-22 Solar clock

Publications (1)

Publication Number Publication Date
CH661175GA3 true CH661175GA3 (en) 1987-07-15

Family

ID=4249959

Family Applications (1)

Application Number Title Priority Date Filing Date
CH316285A CH661175GA3 (en) 1985-07-22 1985-07-22 Solar clock

Country Status (1)

Country Link
CH (1) CH661175GA3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110108A (en) * 1961-07-17 1963-11-12 Modern Sundials Inc Solar instrument
DE2000577A1 (en) * 1970-01-08 1971-09-23 Gerhard Schoelver sundial
FR2153182A1 (en) * 1971-09-20 1973-05-04 Union Horlogere Gros Vol
DE2348435A1 (en) * 1973-09-26 1975-04-03 Iwan Kahn Sun dial responsive to light field - has separate time scale and light receiving surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110108A (en) * 1961-07-17 1963-11-12 Modern Sundials Inc Solar instrument
DE2000577A1 (en) * 1970-01-08 1971-09-23 Gerhard Schoelver sundial
FR2153182A1 (en) * 1971-09-20 1973-05-04 Union Horlogere Gros Vol
DE2348435A1 (en) * 1973-09-26 1975-04-03 Iwan Kahn Sun dial responsive to light field - has separate time scale and light receiving surface

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