JPH0720593U - Sundial with electronic clock - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a precision sundial whose accuracy can be confirmed. [Structure] An electronic timepiece for comparison was attached to a part of a precision sundial with corrections for time difference, longitude difference, atmospheric difference, and the like. [Effect] The accuracy read as a sundial can be checked with an electronic watch, and the time can be read with an electronic watch even when there is no sunshine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a precision sundial whose time accuracy can be confirmed.

[0002]

[Prior art]

 Conventionally, large sundial has been installed as an outdoor facility in public facilities such as science museums. However, such a sundial has a problem in terms of time accuracy, and since it can read the time only when it is exposed to sunlight, it is more than just a clock device, it is more like a plaza on the plaza. Was being treated.

Therefore, the present applicant has developed a precision sundial in which the time reading scale of the sundial is corrected for accuracy such as time difference correction and atmospheric difference correction in order to solve such a problem in accuracy of the sundial. It is installed in astronomical public facilities.

[0004]

[Problems to be solved by the device]

 A person who is a little accustomed to the precision sundial can read the time in about 10 seconds, and an ordinary person can read the time in about 30 seconds. However, such a precision sundial has a panel explaining that it is highly accurate, but when reading the actual time, there is no standard for comparing the accuracy, so the person reading it has high accuracy. However, as a result, they are treated like traditional figurines.

An object of the present invention is to solve the above problems and to make a person who reads the high precision of a precision sundial realize that the accuracy of celestial movements can be understood and moved, and It is to provide a timepiece device that can read the time even when there is no sunlight.

[0006]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above object is characterized in that a part of a precision sundial with corrections for time difference, longitude difference, atmospheric difference, etc. is equipped with a comparison electronic timepiece. The electronic timepiece is characterized by being a radio timepiece that receives a standard radio wave to correct the time, and further, the sundial with an electronic timepiece is equipped with a solar battery for driving the electronic timepiece. I am trying.

[0007]

【Example】

 FIG. 1 is a perspective view of a sundial with an electronic timepiece according to the invention. Reference numeral 1 denotes a sundial, in which a nonemon base portion 3 and a scale frame body 4 are fixed on a pedestal 2, and a time scale plate 5 is attached to the inner peripheral portion of the scale frame body 4. The time scale plate 5 is engraved with graduation lines 5a at intervals of 10 minutes, and the graduation lines 5a are in the shape of a figure 8 in which corrections such as time difference, longitude difference and atmospheric difference have been made.

Further, a Nomon tip sphere 6 is attached to the apex of the Nomon base portion 3, and as a sundial, the time on the time scale plate 5 where the shadow of the Nomon tip sphere 6 due to sunlight is located is read. This is well known. An electronic timepiece 10 that receives a standard radio wave that transmits time information to correct the time and a solar cell 11 that supplies energy to the electronic timepiece 10 are attached to the slope 3a of the nonmon base portion 3. .

According to the above configuration, the electronic timepiece 10 is always driven by the solar cell 11 and the time is adjusted by the standard radio wave, so that the electronic timepiece 10 is a maintenance-free standard timepiece that does not require battery replacement or time adjustment. ing. That is, even if the electronic timepiece 10 is temporarily stopped due to lack of energy from the solar cell 11 as a result of lack of sunlight due to continuous rainy weather, the weather is recovered and the energy from the solar cell 11 is supplied again. When the electronic timepiece 10 resumes operation, the time is immediately corrected by the standard radio wave, so the electronic timepiece 10 in operation always displays the correct time.

Therefore, the person who watches the sundial 1 should compare the time indicated by the shadow of the Nomon tip sphere 6 on the corrected time scale plate 5 with the standard time indicated by the electronic timepiece 10 as the standard timepiece. With this, you can recognize the high accuracy of the sundial 1, and you will be impressed again by the accuracy of celestial movement.

[0011]

[Effect of device]

 As described above, according to the present invention, the reading time of the sundial can be compared with that of the attached electronic timepiece, so that the accuracy of the sundial can be confirmed and the celestial body's accuracy can be felt and moved. It has the effect of being able to remember. Moreover, since the time can be read by the attached electronic timepiece even when the sunshine is interrupted, it can be used as a timepiece device at all times, and there is no fear of being treated as a mere figurine as in the past.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sundial of the present invention.

[Explanation of symbols]

 1 sundial 2 pedestal 3 Nomon base 5 Time scale 6 Nomon tip ball 10 Electronic clock

Claims (3)

[Scope of utility model registration request] 1. A sundial with an electronic timepiece, wherein an electronic timepiece for comparison is attached to a part of a precision sundial that has been corrected for time difference, longitude difference, atmospheric difference and the like. 2. A sundial with an electronic timepiece, wherein the electronic timepiece is a radio timepiece that receives a standard radio wave to correct the time. 3. The sundial with an electronic timepiece, wherein the sundial with an electronic timepiece is provided with a solar cell for driving the electronic timepiece.