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Publication numberUS3763647 A
Publication typeGrant
Publication date9 Oct 1973
Filing date22 Sep 1972
Priority date22 Sep 1972
Publication numberUS 3763647 A, US 3763647A, US-A-3763647, US3763647 A, US3763647A
InventorsShibanai I
Original AssigneeKyoshin Sangyo Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Polychromatic watch dial plate
US 3763647 A
Abstract
A polychromatic watch dial plate wherein either on the surface of the dial plate or on the figure portion is coated with a liquid crystal film so that the dial plate or the figure portion may have a variety of colors according to the change of the ambient temperature.
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Description  (OCR text may contain errors)

United States Patent 1191 [111 3,763,%7 Shibanai Get 9, W73

[5 POLYCHROMATIC WATCH DIAL PLATE 3,440,882 4/1969 Jones 73/356 3,570,239 3/ 1971 Charles 58/152 R [75] Invent Japan 3,253,466 5/1966 Chough 58/152 R x [73] Assignee: Kyoshin Sangyo Ltd"T0kyo Primary Examiner-Richard B. Wilkinson Japan Assistant Examiner-Edith Simmons Jackmon [22] Fil d; S 22 1972 Attorney-Eric H. Waters et al. 21 Appl. No.: 291,839 [571' ABSTRACT A polychromatic watch dial plate wherein either on [52] US. Cl. 58/127 R, 58/152 R, 73/356 .the surface of the dial plate or on the figure portion is [51] Int. Cl. G04b 19/06 coated with a liquid crystal film so that the dial plate [58] Field of Search 58/127 R, 152 R, or the figure portion may have a variety of colors ac- 58/152 A, 50 R; 73/356 cording to the change of the ambient temperature.

3 References Cited Claims, 3 Drawing igures UNITED STATES PATENTS 3,505,804 4/1970 Hofstein 58/23 R 1- POLYCI'IROMATIC WATCH DIAL PLATE The present invention relates to a decorative watch and, more particularly to a polychromatic dial plate of a watch.

I-Ieretofore, a luminous paint coating has been applied on the pointers and the figures of a watch so that even in the dark the user can read a correct time. However, such a coating is used for that purpose only and has no decorative or magic effects. Also, there have been many decorative dial plates with beautiful and colorful designs and some of them are polychromic but none of them become polychromatic according to temperature variations. In other words, they only become polychromic due to the visual angle of the viewer, or to the effect of light and shade, or the like. On the contrary, the dial plate according to the present invention employs a liquid crystal film coating on the dial plate, either on the plate surface or on the firgure portion, and the liquid crystal film having characteristic of exhibiting a variety of colors according to the change of the ambient temperature or of the body heat of the user, gives rise to an excellent decorative and magic effect to the viewer, in addition to the normal function of the watch.

Therefore, an object of the present invention is to provide a decorative and magic watch having a-polychromatic dial plate which exhibits a variety of colors according to the change of the ambient temperature.

Another object of the present invention is to provide a decorative and magic watch having a polychromatic dial plate wherein the surface of the dial plate excluding the figure portion is coated with a liquid crystal film so that the dial plate may have a variety of colors according to the change of the ambient temperature.

Still another object of the present invention is to provide a decorative and magic watch having a polychromatic dial plate wherein the figure portion excluding the surface of the dial plate is coated with a liquid crystal film so that the figure portion may have a variety of colors in contrast to the surface of the dial plate according to the change of the ambient temperature.

The present invention will now be explained in detail by way of example, with reference to the accompanying drawings in which:

FIG. 1 shows a plain view of a watch dial plate according to the present invention;

FIG. 2 shows a vertical sectional view taken from A-A line of FIG. l in which a liquid crystal film is coated on the surface of the dial plate excluding the figure portion; and

FIG. 3 shows a vertical sectional view taken from A-A' line of FIG. I in which a liquid crystal film is coated only on the figure portion.

Referring to FIG. 1 and FIG. 2, a polychromatic watch dial plate according to the present invention roughly consists ofa dial plate I, a figure portion generally denoted by numeral 2, pointers 3, a watch frame 4 and a front glass 5.

Referring to FIG. 2, the surface of the dial plate 11, with the exception of the figure portion 2, is coated with a liquid crystal film 6. The figure portion 2 is made of, or drawn with, a material different, in color, from the liquid crystal film 6 so that both the crystal film applied portion and the non-applied portion on the dial plate I can be clearly distinguished from each other by color. On the contrary, as shown in FIG. 3, the liquid crystal film 6 may be applied only on the figure portion 2. In this case, the surface of the dial plate 1 is of course made of a material different, in color, from the liquid crystal film 6. In either case the entire surface is then covered by a transparent synthetic resin film 7 to protect the liquid crystal film 6 from damages.

The above described construction according to the present invention has the advantage that the user can enjoy a polychromic and magic beauty as he encounters various external temperature conditions.

What I claim is:

1. A polychromatic watch dial face plate with a liquid crystal film coating for varying the color of the dial face as a function of the ambient temperature, said dial face displaying a predetermined single color corresponding to a predetermined temperature, whereby the color of the dial face is indicative of the ambient temperature.

2. A polychromatic watch dial face plate as defined in claim 1 wherein said liquid crystal film coating is only on the dial face plate, the character portions of said dial face plate being free of said coating, so that said dial face changes colors with change in the abmient temperature.

3. The polychromatic watch dial face plate as defined in claim 3 wherein said liquid crystal film coating is only on the character portions of said dial face, so that said character portions only change color with change in ambient temperature.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3253466 *28 Mar 196331 May 1966Taik Chough KyoungThermometer device
US3440882 *9 Sep 196629 Apr 1969Westinghouse Electric CorpThermometer
US3505804 *23 Apr 196814 Apr 1970Rca CorpSolid state clock
US3570239 *13 May 196916 Mar 1971Georges Ruedin SaWristwatch with means for checking radioactivity of the environment
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3863439 *21 Aug 19734 Feb 1975Suwa Seikosha KkMacrocystalline watch dial
US4451157 *13 May 198229 May 1984Reap James DCombined time and temperature indicating device
US4687340 *16 Oct 198618 Aug 1987Karel HavelElectronic timepiece with transducers
US4705406 *3 Nov 198610 Nov 1987Karel HavelElectronic timepiece with physical transducer
US4707141 *6 Jan 198717 Nov 1987Karel HavelVariable color analog timepiece
US6616332 *18 Nov 19999 Sep 2003Sensarray CorporationOptical techniques for measuring parameters such as temperature across a surface
US6967900 *13 Sep 200222 Nov 2005Maverick Industries, Inc.Combination clock radio, weather station and message organizer
US699573923 Dec 20027 Feb 2006Zexus Technology LimitedVariable color display and articles incorporating same
Classifications
U.S. Classification368/235, 968/411, 968/156, 374/162
International ClassificationG04B47/00, G04B47/06, G04B19/12, G04B19/06
Cooperative ClassificationG04B47/008, G04B47/06, G04B19/12
European ClassificationG04B19/12, G04B47/06, G04B47/00T